* [Qemu-devel] [PULL 00/19] first batch of s390x patches for 4.1
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Cornelia Huck
The following changes since commit 3284aa128153750f14a61e8a96fd085e6f2999b6:
Merge remote-tracking branch 'remotes/lersek/tags/edk2-pull-2019-04-22' into staging (2019-04-24 13:19:41 +0100)
are available in the Git repository at:
https://github.com/cohuck/qemu tags/s390x-20190425
for you to fetch changes up to 41c3d4269b1c18d12d33c5bf089dace25d08e82e:
Merge tag 's390-ccw-bios-2019-04-12' into s390-next-staging (2019-04-25 14:09:20 +0200)
----------------------------------------------------------------
- properly detect page size of initial memory
- support for IPL (boot) from ECKD DASD passed through via vfio-ccw
----------------------------------------------------------------
Cornelia Huck (1):
Merge tag 's390-ccw-bios-2019-04-12' into s390-next-staging
David Hildenbrand (2):
s390x/kvm: Configure page size after memory has actually been
initialized
exec: Introduce qemu_maxrampagesize() and rename qemu_getrampagesize()
Jason J. Herne (16):
s390 vfio-ccw: Add bootindex property and IPLB data
s390-bios: decouple cio setup from virtio
s390-bios: decouple common boot logic from virtio
s390-bios: Clean up cio.h
s390-bios: Decouple channel i/o logic from virtio
s390-bios: Map low core memory
s390-bios: ptr2u32 and u32toptr
s390-bios: Support for running format-0/1 channel programs
s390-bios: cio error handling
s390-bios: Extend find_dev() for non-virtio devices
s390-bios: Factor finding boot device out of virtio code path
s390-bios: Refactor virtio to run channel programs via cio
s390-bios: Use control unit type to determine boot method
s390-bios: Add channel command codes/structs needed for dasd-ipl
s390-bios: Support booting from real dasd device
s390-bios: Use control unit type to find bootable devices
Thomas Huth (1):
pc-bios/s390: Update firmware images
--
2.17.2
^ permalink raw reply [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 00/19] first batch of s390x patches for 4.1
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, Cornelia Huck, qemu-devel
The following changes since commit 3284aa128153750f14a61e8a96fd085e6f2999b6:
Merge remote-tracking branch 'remotes/lersek/tags/edk2-pull-2019-04-22' into staging (2019-04-24 13:19:41 +0100)
are available in the Git repository at:
https://github.com/cohuck/qemu tags/s390x-20190425
for you to fetch changes up to 41c3d4269b1c18d12d33c5bf089dace25d08e82e:
Merge tag 's390-ccw-bios-2019-04-12' into s390-next-staging (2019-04-25 14:09:20 +0200)
----------------------------------------------------------------
- properly detect page size of initial memory
- support for IPL (boot) from ECKD DASD passed through via vfio-ccw
----------------------------------------------------------------
Cornelia Huck (1):
Merge tag 's390-ccw-bios-2019-04-12' into s390-next-staging
David Hildenbrand (2):
s390x/kvm: Configure page size after memory has actually been
initialized
exec: Introduce qemu_maxrampagesize() and rename qemu_getrampagesize()
Jason J. Herne (16):
s390 vfio-ccw: Add bootindex property and IPLB data
s390-bios: decouple cio setup from virtio
s390-bios: decouple common boot logic from virtio
s390-bios: Clean up cio.h
s390-bios: Decouple channel i/o logic from virtio
s390-bios: Map low core memory
s390-bios: ptr2u32 and u32toptr
s390-bios: Support for running format-0/1 channel programs
s390-bios: cio error handling
s390-bios: Extend find_dev() for non-virtio devices
s390-bios: Factor finding boot device out of virtio code path
s390-bios: Refactor virtio to run channel programs via cio
s390-bios: Use control unit type to determine boot method
s390-bios: Add channel command codes/structs needed for dasd-ipl
s390-bios: Support booting from real dasd device
s390-bios: Use control unit type to find bootable devices
Thomas Huth (1):
pc-bios/s390: Update firmware images
--
2.17.2
^ permalink raw reply [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Add bootindex property and iplb data for vfio-ccw devices. This allows us to
forward boot information into the bios for vfio-ccw devices.
Refactor s390_get_ccw_device() to return device type. This prevents us from
having to use messy casting logic in several places.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-2-git-send-email-jjherne@linux.ibm.com>
[thuth: fixed "typedef struct VFIOCCWDevice" build failure with clang]
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
MAINTAINERS | 1 +
hw/s390x/ipl.c | 61 ++++++++++++++++++++++++++++---------
hw/s390x/s390-ccw.c | 9 ++++++
hw/vfio/ccw.c | 6 ++--
include/hw/s390x/s390-ccw.h | 1 +
include/hw/s390x/vfio-ccw.h | 28 +++++++++++++++++
6 files changed, 88 insertions(+), 18 deletions(-)
create mode 100644 include/hw/s390x/vfio-ccw.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 56139ac8ab05..f7976aa43d0a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1445,6 +1445,7 @@ S: Supported
F: hw/vfio/ccw.c
F: hw/s390x/s390-ccw.c
F: include/hw/s390x/s390-ccw.h
+F: include/hw/s390x/vfio-ccw.h
T: git https://github.com/cohuck/qemu.git s390-next
L: qemu-s390x@nongnu.org
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 51b272e190a9..d0cc06a05fd0 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -19,6 +19,7 @@
#include "hw/loader.h"
#include "hw/boards.h"
#include "hw/s390x/virtio-ccw.h"
+#include "hw/s390x/vfio-ccw.h"
#include "hw/s390x/css.h"
#include "hw/s390x/ebcdic.h"
#include "ipl.h"
@@ -303,16 +304,36 @@ static void s390_ipl_set_boot_menu(S390IPLState *ipl)
ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
}
-static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
+#define CCW_DEVTYPE_NONE 0x00
+#define CCW_DEVTYPE_VIRTIO 0x01
+#define CCW_DEVTYPE_VIRTIO_NET 0x02
+#define CCW_DEVTYPE_SCSI 0x03
+#define CCW_DEVTYPE_VFIO 0x04
+
+static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
{
CcwDevice *ccw_dev = NULL;
+ int tmp_dt = CCW_DEVTYPE_NONE;
if (dev_st) {
+ VirtIONet *virtio_net_dev = (VirtIONet *)
+ object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
TYPE_VIRTIO_CCW_DEVICE);
+ VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
+ object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
+
if (virtio_ccw_dev) {
ccw_dev = CCW_DEVICE(virtio_ccw_dev);
+ if (virtio_net_dev) {
+ tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
+ } else {
+ tmp_dt = CCW_DEVTYPE_VIRTIO;
+ }
+ } else if (vfio_ccw_dev) {
+ ccw_dev = CCW_DEVICE(vfio_ccw_dev);
+ tmp_dt = CCW_DEVTYPE_VFIO;
} else {
SCSIDevice *sd = (SCSIDevice *)
object_dynamic_cast(OBJECT(dev_st),
@@ -325,9 +346,13 @@ static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
TYPE_CCW_DEVICE);
+ tmp_dt = CCW_DEVTYPE_SCSI;
}
}
}
+ if (devtype) {
+ *devtype = tmp_dt;
+ }
return ccw_dev;
}
@@ -335,20 +360,22 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
{
DeviceState *dev_st;
CcwDevice *ccw_dev = NULL;
+ SCSIDevice *sd;
+ int devtype;
dev_st = get_boot_device(0);
if (dev_st) {
- ccw_dev = s390_get_ccw_device(dev_st);
+ ccw_dev = s390_get_ccw_device(dev_st, &devtype);
}
/*
* Currently allow IPL only from CCW devices.
*/
if (ccw_dev) {
- SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
- TYPE_SCSI_DEVICE);
-
- if (sd) {
+ switch (devtype) {
+ case CCW_DEVTYPE_SCSI:
+ sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
+ TYPE_SCSI_DEVICE);
ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
ipl->iplb.blk0_len =
cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
@@ -358,20 +385,24 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
- } else {
- VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
- TYPE_VIRTIO_NET);
-
+ break;
+ case CCW_DEVTYPE_VFIO:
+ ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
+ ipl->iplb.pbt = S390_IPL_TYPE_CCW;
+ ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
+ ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
+ break;
+ case CCW_DEVTYPE_VIRTIO_NET:
+ ipl->netboot = true;
+ /* Fall through to CCW_DEVTYPE_VIRTIO case */
+ case CCW_DEVTYPE_VIRTIO:
ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
ipl->iplb.blk0_len =
cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
ipl->iplb.pbt = S390_IPL_TYPE_CCW;
ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
-
- if (vn) {
- ipl->netboot = true;
- }
+ break;
}
if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
@@ -530,7 +561,7 @@ void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
!ipl->netboot &&
ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
is_virtio_scsi_device(&ipl->iplb)) {
- CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0));
+ CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
if (ccw_dev &&
cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c
index cad91ee62679..f5f025d1b6ca 100644
--- a/hw/s390x/s390-ccw.c
+++ b/hw/s390x/s390-ccw.c
@@ -124,6 +124,14 @@ static void s390_ccw_unrealize(S390CCWDevice *cdev, Error **errp)
g_free(cdev->mdevid);
}
+static void s390_ccw_instance_init(Object *obj)
+{
+ S390CCWDevice *dev = S390_CCW_DEVICE(obj);
+
+ device_add_bootindex_property(obj, &dev->bootindex, "bootindex",
+ "/disk@0,0", DEVICE(obj), NULL);
+}
+
static void s390_ccw_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@@ -137,6 +145,7 @@ static void s390_ccw_class_init(ObjectClass *klass, void *data)
static const TypeInfo s390_ccw_info = {
.name = TYPE_S390_CCW,
.parent = TYPE_CCW_DEVICE,
+ .instance_init = s390_ccw_instance_init,
.instance_size = sizeof(S390CCWDevice),
.class_size = sizeof(S390CCWDeviceClass),
.class_init = s390_ccw_class_init,
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index c44d13cc5081..31dd3a2a87b6 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -21,12 +21,12 @@
#include "hw/vfio/vfio.h"
#include "hw/vfio/vfio-common.h"
#include "hw/s390x/s390-ccw.h"
+#include "hw/s390x/vfio-ccw.h"
#include "hw/s390x/ccw-device.h"
#include "exec/address-spaces.h"
#include "qemu/error-report.h"
-#define TYPE_VFIO_CCW "vfio-ccw"
-typedef struct VFIOCCWDevice {
+struct VFIOCCWDevice {
S390CCWDevice cdev;
VFIODevice vdev;
uint64_t io_region_size;
@@ -35,7 +35,7 @@ typedef struct VFIOCCWDevice {
EventNotifier io_notifier;
bool force_orb_pfch;
bool warned_orb_pfch;
-} VFIOCCWDevice;
+};
static inline void warn_once_pfch(VFIOCCWDevice *vcdev, SubchDev *sch,
const char *msg)
diff --git a/include/hw/s390x/s390-ccw.h b/include/hw/s390x/s390-ccw.h
index 7d15a1a5d41d..901d805d79a3 100644
--- a/include/hw/s390x/s390-ccw.h
+++ b/include/hw/s390x/s390-ccw.h
@@ -27,6 +27,7 @@ typedef struct S390CCWDevice {
CcwDevice parent_obj;
CssDevId hostid;
char *mdevid;
+ int32_t bootindex;
} S390CCWDevice;
typedef struct S390CCWDeviceClass {
diff --git a/include/hw/s390x/vfio-ccw.h b/include/hw/s390x/vfio-ccw.h
new file mode 100644
index 000000000000..ee5250d0d788
--- /dev/null
+++ b/include/hw/s390x/vfio-ccw.h
@@ -0,0 +1,28 @@
+/*
+ * vfio based subchannel assignment support
+ *
+ * Copyright 2017, 2019 IBM Corp.
+ * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
+ * Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
+ * Pierre Morel <pmorel@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef HW_VFIO_CCW_H
+#define HW_VFIO_CCW_H
+
+#include "hw/vfio/vfio-common.h"
+#include "hw/s390x/s390-ccw.h"
+#include "hw/s390x/ccw-device.h"
+
+#define TYPE_VFIO_CCW "vfio-ccw"
+#define VFIO_CCW(obj) \
+ OBJECT_CHECK(VFIOCCWDevice, (obj), TYPE_VFIO_CCW)
+
+#define TYPE_VFIO_CCW "vfio-ccw"
+typedef struct VFIOCCWDevice VFIOCCWDevice;
+
+#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Add bootindex property and iplb data for vfio-ccw devices. This allows us to
forward boot information into the bios for vfio-ccw devices.
Refactor s390_get_ccw_device() to return device type. This prevents us from
having to use messy casting logic in several places.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-2-git-send-email-jjherne@linux.ibm.com>
[thuth: fixed "typedef struct VFIOCCWDevice" build failure with clang]
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
MAINTAINERS | 1 +
hw/s390x/ipl.c | 61 ++++++++++++++++++++++++++++---------
hw/s390x/s390-ccw.c | 9 ++++++
hw/vfio/ccw.c | 6 ++--
include/hw/s390x/s390-ccw.h | 1 +
include/hw/s390x/vfio-ccw.h | 28 +++++++++++++++++
6 files changed, 88 insertions(+), 18 deletions(-)
create mode 100644 include/hw/s390x/vfio-ccw.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 56139ac8ab05..f7976aa43d0a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1445,6 +1445,7 @@ S: Supported
F: hw/vfio/ccw.c
F: hw/s390x/s390-ccw.c
F: include/hw/s390x/s390-ccw.h
+F: include/hw/s390x/vfio-ccw.h
T: git https://github.com/cohuck/qemu.git s390-next
L: qemu-s390x@nongnu.org
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 51b272e190a9..d0cc06a05fd0 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -19,6 +19,7 @@
#include "hw/loader.h"
#include "hw/boards.h"
#include "hw/s390x/virtio-ccw.h"
+#include "hw/s390x/vfio-ccw.h"
#include "hw/s390x/css.h"
#include "hw/s390x/ebcdic.h"
#include "ipl.h"
@@ -303,16 +304,36 @@ static void s390_ipl_set_boot_menu(S390IPLState *ipl)
ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
}
-static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
+#define CCW_DEVTYPE_NONE 0x00
+#define CCW_DEVTYPE_VIRTIO 0x01
+#define CCW_DEVTYPE_VIRTIO_NET 0x02
+#define CCW_DEVTYPE_SCSI 0x03
+#define CCW_DEVTYPE_VFIO 0x04
+
+static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
{
CcwDevice *ccw_dev = NULL;
+ int tmp_dt = CCW_DEVTYPE_NONE;
if (dev_st) {
+ VirtIONet *virtio_net_dev = (VirtIONet *)
+ object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
TYPE_VIRTIO_CCW_DEVICE);
+ VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
+ object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
+
if (virtio_ccw_dev) {
ccw_dev = CCW_DEVICE(virtio_ccw_dev);
+ if (virtio_net_dev) {
+ tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
+ } else {
+ tmp_dt = CCW_DEVTYPE_VIRTIO;
+ }
+ } else if (vfio_ccw_dev) {
+ ccw_dev = CCW_DEVICE(vfio_ccw_dev);
+ tmp_dt = CCW_DEVTYPE_VFIO;
} else {
SCSIDevice *sd = (SCSIDevice *)
object_dynamic_cast(OBJECT(dev_st),
@@ -325,9 +346,13 @@ static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
TYPE_CCW_DEVICE);
+ tmp_dt = CCW_DEVTYPE_SCSI;
}
}
}
+ if (devtype) {
+ *devtype = tmp_dt;
+ }
return ccw_dev;
}
@@ -335,20 +360,22 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
{
DeviceState *dev_st;
CcwDevice *ccw_dev = NULL;
+ SCSIDevice *sd;
+ int devtype;
dev_st = get_boot_device(0);
if (dev_st) {
- ccw_dev = s390_get_ccw_device(dev_st);
+ ccw_dev = s390_get_ccw_device(dev_st, &devtype);
}
/*
* Currently allow IPL only from CCW devices.
*/
if (ccw_dev) {
- SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
- TYPE_SCSI_DEVICE);
-
- if (sd) {
+ switch (devtype) {
+ case CCW_DEVTYPE_SCSI:
+ sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
+ TYPE_SCSI_DEVICE);
ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
ipl->iplb.blk0_len =
cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
@@ -358,20 +385,24 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
- } else {
- VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
- TYPE_VIRTIO_NET);
-
+ break;
+ case CCW_DEVTYPE_VFIO:
+ ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
+ ipl->iplb.pbt = S390_IPL_TYPE_CCW;
+ ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
+ ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
+ break;
+ case CCW_DEVTYPE_VIRTIO_NET:
+ ipl->netboot = true;
+ /* Fall through to CCW_DEVTYPE_VIRTIO case */
+ case CCW_DEVTYPE_VIRTIO:
ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
ipl->iplb.blk0_len =
cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
ipl->iplb.pbt = S390_IPL_TYPE_CCW;
ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
-
- if (vn) {
- ipl->netboot = true;
- }
+ break;
}
if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
@@ -530,7 +561,7 @@ void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
!ipl->netboot &&
ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
is_virtio_scsi_device(&ipl->iplb)) {
- CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0));
+ CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
if (ccw_dev &&
cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c
index cad91ee62679..f5f025d1b6ca 100644
--- a/hw/s390x/s390-ccw.c
+++ b/hw/s390x/s390-ccw.c
@@ -124,6 +124,14 @@ static void s390_ccw_unrealize(S390CCWDevice *cdev, Error **errp)
g_free(cdev->mdevid);
}
+static void s390_ccw_instance_init(Object *obj)
+{
+ S390CCWDevice *dev = S390_CCW_DEVICE(obj);
+
+ device_add_bootindex_property(obj, &dev->bootindex, "bootindex",
+ "/disk@0,0", DEVICE(obj), NULL);
+}
+
static void s390_ccw_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@@ -137,6 +145,7 @@ static void s390_ccw_class_init(ObjectClass *klass, void *data)
static const TypeInfo s390_ccw_info = {
.name = TYPE_S390_CCW,
.parent = TYPE_CCW_DEVICE,
+ .instance_init = s390_ccw_instance_init,
.instance_size = sizeof(S390CCWDevice),
.class_size = sizeof(S390CCWDeviceClass),
.class_init = s390_ccw_class_init,
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index c44d13cc5081..31dd3a2a87b6 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -21,12 +21,12 @@
#include "hw/vfio/vfio.h"
#include "hw/vfio/vfio-common.h"
#include "hw/s390x/s390-ccw.h"
+#include "hw/s390x/vfio-ccw.h"
#include "hw/s390x/ccw-device.h"
#include "exec/address-spaces.h"
#include "qemu/error-report.h"
-#define TYPE_VFIO_CCW "vfio-ccw"
-typedef struct VFIOCCWDevice {
+struct VFIOCCWDevice {
S390CCWDevice cdev;
VFIODevice vdev;
uint64_t io_region_size;
@@ -35,7 +35,7 @@ typedef struct VFIOCCWDevice {
EventNotifier io_notifier;
bool force_orb_pfch;
bool warned_orb_pfch;
-} VFIOCCWDevice;
+};
static inline void warn_once_pfch(VFIOCCWDevice *vcdev, SubchDev *sch,
const char *msg)
diff --git a/include/hw/s390x/s390-ccw.h b/include/hw/s390x/s390-ccw.h
index 7d15a1a5d41d..901d805d79a3 100644
--- a/include/hw/s390x/s390-ccw.h
+++ b/include/hw/s390x/s390-ccw.h
@@ -27,6 +27,7 @@ typedef struct S390CCWDevice {
CcwDevice parent_obj;
CssDevId hostid;
char *mdevid;
+ int32_t bootindex;
} S390CCWDevice;
typedef struct S390CCWDeviceClass {
diff --git a/include/hw/s390x/vfio-ccw.h b/include/hw/s390x/vfio-ccw.h
new file mode 100644
index 000000000000..ee5250d0d788
--- /dev/null
+++ b/include/hw/s390x/vfio-ccw.h
@@ -0,0 +1,28 @@
+/*
+ * vfio based subchannel assignment support
+ *
+ * Copyright 2017, 2019 IBM Corp.
+ * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
+ * Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
+ * Pierre Morel <pmorel@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef HW_VFIO_CCW_H
+#define HW_VFIO_CCW_H
+
+#include "hw/vfio/vfio-common.h"
+#include "hw/s390x/s390-ccw.h"
+#include "hw/s390x/ccw-device.h"
+
+#define TYPE_VFIO_CCW "vfio-ccw"
+#define VFIO_CCW(obj) \
+ OBJECT_CHECK(VFIOCCWDevice, (obj), TYPE_VFIO_CCW)
+
+#define TYPE_VFIO_CCW "vfio-ccw"
+typedef struct VFIOCCWDevice VFIOCCWDevice;
+
+#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 02/19] s390-bios: decouple cio setup from virtio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Move channel i/o setup code out to a separate function. This decouples cio
setup from the virtio code path and allows us to make use of it for booting
dasd devices.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-3-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 544851d672d8..e82fe2ce2315 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -99,6 +99,18 @@ static void menu_setup(void)
}
}
+/*
+ * Initialize the channel I/O subsystem so we can talk to our ipl/boot device.
+ */
+static void css_setup(void)
+{
+ /*
+ * Unconditionally enable mss support. In every sane configuration this
+ * will succeed; and even if it doesn't, stsch_err() can handle it.
+ */
+ enable_mss_facility();
+}
+
static void virtio_setup(void)
{
Schib schib;
@@ -109,13 +121,6 @@ static void virtio_setup(void)
VDev *vdev = virtio_get_device();
QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
- /*
- * We unconditionally enable mss support. In every sane configuration,
- * this will succeed; and even if it doesn't, stsch_err() can deal
- * with the consequences.
- */
- enable_mss_facility();
-
sclp_get_loadparm_ascii(loadparm_str);
memcpy(ldp + 10, loadparm_str, LOADPARM_LEN);
sclp_print(ldp);
@@ -168,6 +173,7 @@ static void virtio_setup(void)
int main(void)
{
sclp_setup();
+ css_setup();
virtio_setup();
zipl_load(); /* no return */
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 02/19] s390-bios: decouple cio setup from virtio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Move channel i/o setup code out to a separate function. This decouples cio
setup from the virtio code path and allows us to make use of it for booting
dasd devices.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-3-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 544851d672d8..e82fe2ce2315 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -99,6 +99,18 @@ static void menu_setup(void)
}
}
+/*
+ * Initialize the channel I/O subsystem so we can talk to our ipl/boot device.
+ */
+static void css_setup(void)
+{
+ /*
+ * Unconditionally enable mss support. In every sane configuration this
+ * will succeed; and even if it doesn't, stsch_err() can handle it.
+ */
+ enable_mss_facility();
+}
+
static void virtio_setup(void)
{
Schib schib;
@@ -109,13 +121,6 @@ static void virtio_setup(void)
VDev *vdev = virtio_get_device();
QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
- /*
- * We unconditionally enable mss support. In every sane configuration,
- * this will succeed; and even if it doesn't, stsch_err() can deal
- * with the consequences.
- */
- enable_mss_facility();
-
sclp_get_loadparm_ascii(loadparm_str);
memcpy(ldp + 10, loadparm_str, LOADPARM_LEN);
sclp_print(ldp);
@@ -168,6 +173,7 @@ static void virtio_setup(void)
int main(void)
{
sclp_setup();
+ css_setup();
virtio_setup();
zipl_load(); /* no return */
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 03/19] s390-bios: decouple common boot logic from virtio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Create a boot_setup function to handle getting boot information from
the machine/hypervisor. This decouples common boot logic from the
virtio code path and allows us to make use of it for the real dasd boot
scenario.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-4-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 28 ++++++++++++++++++++--------
1 file changed, 20 insertions(+), 8 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index e82fe2ce2315..67df42191b94 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -14,16 +14,17 @@
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
static SubChannelId blk_schid = { .one = 1 };
-IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static char loadparm_str[LOADPARM_LEN + 1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
QemuIplParameters qipl;
+IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
+static bool have_iplb;
#define LOADPARM_PROMPT "PROMPT "
#define LOADPARM_EMPTY " "
#define BOOT_MENU_FLAG_MASK (QIPL_FLAG_BM_OPTS_CMD | QIPL_FLAG_BM_OPTS_ZIPL)
/*
- * Priniciples of Operations (SA22-7832-09) chapter 17 requires that
+ * Principles of Operations (SA22-7832-09) chapter 17 requires that
* a subsystem-identification is at 184-187 and bytes 188-191 are zero
* after list-directed-IPL and ccw-IPL.
*/
@@ -111,23 +112,33 @@ static void css_setup(void)
enable_mss_facility();
}
+/*
+ * Collect various pieces of information from the hypervisor/hardware that
+ * we'll use to determine exactly how we'll boot.
+ */
+static void boot_setup(void)
+{
+ char lpmsg[] = "LOADPARM=[________]\n";
+
+ sclp_get_loadparm_ascii(loadparm_str);
+ memcpy(lpmsg + 10, loadparm_str, 8);
+ sclp_print(lpmsg);
+
+ have_iplb = store_iplb(&iplb);
+}
+
static void virtio_setup(void)
{
Schib schib;
int ssid;
bool found = false;
uint16_t dev_no;
- char ldp[] = "LOADPARM=[________]\n";
VDev *vdev = virtio_get_device();
QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
- sclp_get_loadparm_ascii(loadparm_str);
- memcpy(ldp + 10, loadparm_str, LOADPARM_LEN);
- sclp_print(ldp);
-
memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
- if (store_iplb(&iplb)) {
+ if (have_iplb) {
switch (iplb.pbt) {
case S390_IPL_TYPE_CCW:
dev_no = iplb.ccw.devno;
@@ -174,6 +185,7 @@ int main(void)
{
sclp_setup();
css_setup();
+ boot_setup();
virtio_setup();
zipl_load(); /* no return */
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 03/19] s390-bios: decouple common boot logic from virtio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Create a boot_setup function to handle getting boot information from
the machine/hypervisor. This decouples common boot logic from the
virtio code path and allows us to make use of it for the real dasd boot
scenario.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-4-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 28 ++++++++++++++++++++--------
1 file changed, 20 insertions(+), 8 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index e82fe2ce2315..67df42191b94 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -14,16 +14,17 @@
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
static SubChannelId blk_schid = { .one = 1 };
-IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static char loadparm_str[LOADPARM_LEN + 1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
QemuIplParameters qipl;
+IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
+static bool have_iplb;
#define LOADPARM_PROMPT "PROMPT "
#define LOADPARM_EMPTY " "
#define BOOT_MENU_FLAG_MASK (QIPL_FLAG_BM_OPTS_CMD | QIPL_FLAG_BM_OPTS_ZIPL)
/*
- * Priniciples of Operations (SA22-7832-09) chapter 17 requires that
+ * Principles of Operations (SA22-7832-09) chapter 17 requires that
* a subsystem-identification is at 184-187 and bytes 188-191 are zero
* after list-directed-IPL and ccw-IPL.
*/
@@ -111,23 +112,33 @@ static void css_setup(void)
enable_mss_facility();
}
+/*
+ * Collect various pieces of information from the hypervisor/hardware that
+ * we'll use to determine exactly how we'll boot.
+ */
+static void boot_setup(void)
+{
+ char lpmsg[] = "LOADPARM=[________]\n";
+
+ sclp_get_loadparm_ascii(loadparm_str);
+ memcpy(lpmsg + 10, loadparm_str, 8);
+ sclp_print(lpmsg);
+
+ have_iplb = store_iplb(&iplb);
+}
+
static void virtio_setup(void)
{
Schib schib;
int ssid;
bool found = false;
uint16_t dev_no;
- char ldp[] = "LOADPARM=[________]\n";
VDev *vdev = virtio_get_device();
QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
- sclp_get_loadparm_ascii(loadparm_str);
- memcpy(ldp + 10, loadparm_str, LOADPARM_LEN);
- sclp_print(ldp);
-
memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
- if (store_iplb(&iplb)) {
+ if (have_iplb) {
switch (iplb.pbt) {
case S390_IPL_TYPE_CCW:
dev_no = iplb.ccw.devno;
@@ -174,6 +185,7 @@ int main(void)
{
sclp_setup();
css_setup();
+ boot_setup();
virtio_setup();
zipl_load(); /* no return */
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 04/19] s390-bios: Clean up cio.h
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Add proper typedefs to all structs and modify all bit fields to use consistent
formatting.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-5-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.h | 114 ++++++++++++++++++------------------
pc-bios/s390-ccw/s390-ccw.h | 8 ---
2 files changed, 57 insertions(+), 65 deletions(-)
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index 1a0795f6455f..ed5b2cbf72db 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -17,35 +17,35 @@
* path management control word
*/
struct pmcw {
- __u32 intparm; /* interruption parameter */
- __u32 qf : 1; /* qdio facility */
- __u32 w : 1;
- __u32 isc : 3; /* interruption sublass */
- __u32 res5 : 3; /* reserved zeros */
- __u32 ena : 1; /* enabled */
- __u32 lm : 2; /* limit mode */
- __u32 mme : 2; /* measurement-mode enable */
- __u32 mp : 1; /* multipath mode */
- __u32 tf : 1; /* timing facility */
- __u32 dnv : 1; /* device number valid */
- __u32 dev : 16; /* device number */
- __u8 lpm; /* logical path mask */
- __u8 pnom; /* path not operational mask */
- __u8 lpum; /* last path used mask */
- __u8 pim; /* path installed mask */
- __u16 mbi; /* measurement-block index */
- __u8 pom; /* path operational mask */
- __u8 pam; /* path available mask */
- __u8 chpid[8]; /* CHPID 0-7 (if available) */
- __u32 unused1 : 8; /* reserved zeros */
- __u32 st : 3; /* subchannel type */
- __u32 unused2 : 18; /* reserved zeros */
- __u32 mbfc : 1; /* measurement block format control */
- __u32 xmwme : 1; /* extended measurement word mode enable */
- __u32 csense : 1; /* concurrent sense; can be enabled ...*/
- /* ... per MSCH, however, if facility */
- /* ... is not installed, this results */
- /* ... in an operand exception. */
+ __u32 intparm; /* interruption parameter */
+ __u32 qf:1; /* qdio facility */
+ __u32 w:1;
+ __u32 isc:3; /* interruption sublass */
+ __u32 res5:3; /* reserved zeros */
+ __u32 ena:1; /* enabled */
+ __u32 lm:2; /* limit mode */
+ __u32 mme:2; /* measurement-mode enable */
+ __u32 mp:1; /* multipath mode */
+ __u32 tf:1; /* timing facility */
+ __u32 dnv:1; /* device number valid */
+ __u32 dev:16; /* device number */
+ __u8 lpm; /* logical path mask */
+ __u8 pnom; /* path not operational mask */
+ __u8 lpum; /* last path used mask */
+ __u8 pim; /* path installed mask */
+ __u16 mbi; /* measurement-block index */
+ __u8 pom; /* path operational mask */
+ __u8 pam; /* path available mask */
+ __u8 chpid[8]; /* CHPID 0-7 (if available) */
+ __u32 unused1:8; /* reserved zeros */
+ __u32 st:3; /* subchannel type */
+ __u32 unused2:18; /* reserved zeros */
+ __u32 mbfc:1; /* measurement block format control */
+ __u32 xmwme:1; /* extended measurement word mode enable */
+ __u32 csense:1; /* concurrent sense; can be enabled ...*/
+ /* ... per MSCH, however, if facility */
+ /* ... is not installed, this results */
+ /* ... in an operand exception. */
} __attribute__ ((packed));
/* Target SCHIB configuration. */
@@ -77,28 +77,28 @@ struct scsw {
/*
* subchannel information block
*/
-struct schib {
+typedef struct schib {
struct pmcw pmcw; /* path management control word */
struct scsw scsw; /* subchannel status word */
__u64 mba; /* measurement block address */
__u8 mda[4]; /* model dependent area */
-} __attribute__ ((packed,aligned(4)));
-
-struct subchannel_id {
- __u32 cssid : 8;
- __u32 : 4;
- __u32 m : 1;
- __u32 ssid : 2;
- __u32 one : 1;
- __u32 sch_no : 16;
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) Schib;
+
+typedef struct subchannel_id {
+ __u32 cssid:8;
+ __u32:4;
+ __u32 m:1;
+ __u32 ssid:2;
+ __u32 one:1;
+ __u32 sch_no:16;
+} __attribute__ ((packed, aligned(4))) SubChannelId;
struct chsc_header {
__u16 length;
__u16 code;
} __attribute__((packed));
-struct chsc_area_sda {
+typedef struct chsc_area_sda {
struct chsc_header request;
__u8 reserved1:4;
__u8 format:4;
@@ -111,29 +111,29 @@ struct chsc_area_sda {
__u32 reserved5:4;
__u32 format2:4;
__u32 reserved6:24;
-} __attribute__((packed));
+} __attribute__((packed)) ChscAreaSda;
/*
* TPI info structure
*/
struct tpi_info {
struct subchannel_id schid;
- __u32 intparm; /* interruption parameter */
- __u32 adapter_IO : 1;
- __u32 reserved2 : 1;
- __u32 isc : 3;
- __u32 reserved3 : 12;
- __u32 int_type : 3;
- __u32 reserved4 : 12;
+ __u32 intparm; /* interruption parameter */
+ __u32 adapter_IO:1;
+ __u32 reserved2:1;
+ __u32 isc:3;
+ __u32 reserved3:12;
+ __u32 int_type:3;
+ __u32 reserved4:12;
} __attribute__ ((packed, aligned(4)));
/* channel command word (type 1) */
-struct ccw1 {
+typedef struct ccw1 {
__u8 cmd_code;
__u8 flags;
__u16 count;
__u32 cda;
-} __attribute__ ((packed, aligned(8)));
+} __attribute__ ((packed, aligned(8))) Ccw1;
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
@@ -162,7 +162,7 @@ struct ccw1 {
/*
* Command-mode operation request block
*/
-struct cmd_orb {
+typedef struct cmd_orb {
__u32 intparm; /* interruption parameter */
__u32 key:4; /* flags, like key, suspend control, etc. */
__u32 spnd:1; /* suspend control */
@@ -182,7 +182,7 @@ struct cmd_orb {
__u32 zero:6; /* reserved zeros */
__u32 orbx:1; /* ORB extension control */
__u32 cpa; /* channel program address */
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) CmdOrb;
struct ciw {
__u8 type;
@@ -193,7 +193,7 @@ struct ciw {
/*
* sense-id response buffer layout
*/
-struct senseid {
+typedef struct senseid {
/* common part */
__u8 reserved; /* always 0x'FF' */
__u16 cu_type; /* control unit type */
@@ -203,15 +203,15 @@ struct senseid {
__u8 unused; /* padding byte */
/* extended part */
struct ciw ciw[62];
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) SenseId;
/* interruption response block */
-struct irb {
+typedef struct irb {
struct scsw scsw;
__u32 esw[5];
__u32 ecw[8];
__u32 emw[8];
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) Irb;
/*
* Some S390 specific IO instructions as inline
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 9828aa233d2e..241c6d0b69be 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -49,14 +49,6 @@ typedef unsigned long long __u64;
#include "cio.h"
#include "iplb.h"
-typedef struct irb Irb;
-typedef struct ccw1 Ccw1;
-typedef struct cmd_orb CmdOrb;
-typedef struct schib Schib;
-typedef struct chsc_area_sda ChscAreaSda;
-typedef struct senseid SenseId;
-typedef struct subchannel_id SubChannelId;
-
/* start.s */
void disabled_wait(void);
void consume_sclp_int(void);
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 04/19] s390-bios: Clean up cio.h
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Add proper typedefs to all structs and modify all bit fields to use consistent
formatting.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-5-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.h | 114 ++++++++++++++++++------------------
pc-bios/s390-ccw/s390-ccw.h | 8 ---
2 files changed, 57 insertions(+), 65 deletions(-)
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index 1a0795f6455f..ed5b2cbf72db 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -17,35 +17,35 @@
* path management control word
*/
struct pmcw {
- __u32 intparm; /* interruption parameter */
- __u32 qf : 1; /* qdio facility */
- __u32 w : 1;
- __u32 isc : 3; /* interruption sublass */
- __u32 res5 : 3; /* reserved zeros */
- __u32 ena : 1; /* enabled */
- __u32 lm : 2; /* limit mode */
- __u32 mme : 2; /* measurement-mode enable */
- __u32 mp : 1; /* multipath mode */
- __u32 tf : 1; /* timing facility */
- __u32 dnv : 1; /* device number valid */
- __u32 dev : 16; /* device number */
- __u8 lpm; /* logical path mask */
- __u8 pnom; /* path not operational mask */
- __u8 lpum; /* last path used mask */
- __u8 pim; /* path installed mask */
- __u16 mbi; /* measurement-block index */
- __u8 pom; /* path operational mask */
- __u8 pam; /* path available mask */
- __u8 chpid[8]; /* CHPID 0-7 (if available) */
- __u32 unused1 : 8; /* reserved zeros */
- __u32 st : 3; /* subchannel type */
- __u32 unused2 : 18; /* reserved zeros */
- __u32 mbfc : 1; /* measurement block format control */
- __u32 xmwme : 1; /* extended measurement word mode enable */
- __u32 csense : 1; /* concurrent sense; can be enabled ...*/
- /* ... per MSCH, however, if facility */
- /* ... is not installed, this results */
- /* ... in an operand exception. */
+ __u32 intparm; /* interruption parameter */
+ __u32 qf:1; /* qdio facility */
+ __u32 w:1;
+ __u32 isc:3; /* interruption sublass */
+ __u32 res5:3; /* reserved zeros */
+ __u32 ena:1; /* enabled */
+ __u32 lm:2; /* limit mode */
+ __u32 mme:2; /* measurement-mode enable */
+ __u32 mp:1; /* multipath mode */
+ __u32 tf:1; /* timing facility */
+ __u32 dnv:1; /* device number valid */
+ __u32 dev:16; /* device number */
+ __u8 lpm; /* logical path mask */
+ __u8 pnom; /* path not operational mask */
+ __u8 lpum; /* last path used mask */
+ __u8 pim; /* path installed mask */
+ __u16 mbi; /* measurement-block index */
+ __u8 pom; /* path operational mask */
+ __u8 pam; /* path available mask */
+ __u8 chpid[8]; /* CHPID 0-7 (if available) */
+ __u32 unused1:8; /* reserved zeros */
+ __u32 st:3; /* subchannel type */
+ __u32 unused2:18; /* reserved zeros */
+ __u32 mbfc:1; /* measurement block format control */
+ __u32 xmwme:1; /* extended measurement word mode enable */
+ __u32 csense:1; /* concurrent sense; can be enabled ...*/
+ /* ... per MSCH, however, if facility */
+ /* ... is not installed, this results */
+ /* ... in an operand exception. */
} __attribute__ ((packed));
/* Target SCHIB configuration. */
@@ -77,28 +77,28 @@ struct scsw {
/*
* subchannel information block
*/
-struct schib {
+typedef struct schib {
struct pmcw pmcw; /* path management control word */
struct scsw scsw; /* subchannel status word */
__u64 mba; /* measurement block address */
__u8 mda[4]; /* model dependent area */
-} __attribute__ ((packed,aligned(4)));
-
-struct subchannel_id {
- __u32 cssid : 8;
- __u32 : 4;
- __u32 m : 1;
- __u32 ssid : 2;
- __u32 one : 1;
- __u32 sch_no : 16;
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) Schib;
+
+typedef struct subchannel_id {
+ __u32 cssid:8;
+ __u32:4;
+ __u32 m:1;
+ __u32 ssid:2;
+ __u32 one:1;
+ __u32 sch_no:16;
+} __attribute__ ((packed, aligned(4))) SubChannelId;
struct chsc_header {
__u16 length;
__u16 code;
} __attribute__((packed));
-struct chsc_area_sda {
+typedef struct chsc_area_sda {
struct chsc_header request;
__u8 reserved1:4;
__u8 format:4;
@@ -111,29 +111,29 @@ struct chsc_area_sda {
__u32 reserved5:4;
__u32 format2:4;
__u32 reserved6:24;
-} __attribute__((packed));
+} __attribute__((packed)) ChscAreaSda;
/*
* TPI info structure
*/
struct tpi_info {
struct subchannel_id schid;
- __u32 intparm; /* interruption parameter */
- __u32 adapter_IO : 1;
- __u32 reserved2 : 1;
- __u32 isc : 3;
- __u32 reserved3 : 12;
- __u32 int_type : 3;
- __u32 reserved4 : 12;
+ __u32 intparm; /* interruption parameter */
+ __u32 adapter_IO:1;
+ __u32 reserved2:1;
+ __u32 isc:3;
+ __u32 reserved3:12;
+ __u32 int_type:3;
+ __u32 reserved4:12;
} __attribute__ ((packed, aligned(4)));
/* channel command word (type 1) */
-struct ccw1 {
+typedef struct ccw1 {
__u8 cmd_code;
__u8 flags;
__u16 count;
__u32 cda;
-} __attribute__ ((packed, aligned(8)));
+} __attribute__ ((packed, aligned(8))) Ccw1;
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
@@ -162,7 +162,7 @@ struct ccw1 {
/*
* Command-mode operation request block
*/
-struct cmd_orb {
+typedef struct cmd_orb {
__u32 intparm; /* interruption parameter */
__u32 key:4; /* flags, like key, suspend control, etc. */
__u32 spnd:1; /* suspend control */
@@ -182,7 +182,7 @@ struct cmd_orb {
__u32 zero:6; /* reserved zeros */
__u32 orbx:1; /* ORB extension control */
__u32 cpa; /* channel program address */
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) CmdOrb;
struct ciw {
__u8 type;
@@ -193,7 +193,7 @@ struct ciw {
/*
* sense-id response buffer layout
*/
-struct senseid {
+typedef struct senseid {
/* common part */
__u8 reserved; /* always 0x'FF' */
__u16 cu_type; /* control unit type */
@@ -203,15 +203,15 @@ struct senseid {
__u8 unused; /* padding byte */
/* extended part */
struct ciw ciw[62];
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) SenseId;
/* interruption response block */
-struct irb {
+typedef struct irb {
struct scsw scsw;
__u32 esw[5];
__u32 ecw[8];
__u32 emw[8];
-} __attribute__ ((packed, aligned(4)));
+} __attribute__ ((packed, aligned(4))) Irb;
/*
* Some S390 specific IO instructions as inline
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 9828aa233d2e..241c6d0b69be 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -49,14 +49,6 @@ typedef unsigned long long __u64;
#include "cio.h"
#include "iplb.h"
-typedef struct irb Irb;
-typedef struct ccw1 Ccw1;
-typedef struct cmd_orb CmdOrb;
-typedef struct schib Schib;
-typedef struct chsc_area_sda ChscAreaSda;
-typedef struct senseid SenseId;
-typedef struct subchannel_id SubChannelId;
-
/* start.s */
void disabled_wait(void);
void consume_sclp_int(void);
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 05/19] s390-bios: Decouple channel i/o logic from virtio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Create a separate library for channel i/o related code. This decouples
channel i/o operations from virtio and allows us to make use of them for
the real dasd boot path.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-6-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/Makefile | 2 +-
pc-bios/s390-ccw/cio.c | 44 ++++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/cio.h | 3 +++
pc-bios/s390-ccw/main.c | 1 +
pc-bios/s390-ccw/netboot.mak | 2 +-
pc-bios/s390-ccw/netmain.c | 1 +
pc-bios/s390-ccw/s390-ccw.h | 1 -
pc-bios/s390-ccw/virtio.c | 27 ++--------------------
8 files changed, 53 insertions(+), 28 deletions(-)
create mode 100644 pc-bios/s390-ccw/cio.c
diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile
index 1eb316b02f1f..12ad9c1d5813 100644
--- a/pc-bios/s390-ccw/Makefile
+++ b/pc-bios/s390-ccw/Makefile
@@ -10,7 +10,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
.PHONY : all clean build-all
OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \
- virtio.o virtio-scsi.o virtio-blkdev.o libc.o
+ virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o
QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS))
QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float
diff --git a/pc-bios/s390-ccw/cio.c b/pc-bios/s390-ccw/cio.c
new file mode 100644
index 000000000000..87c6b34e88af
--- /dev/null
+++ b/pc-bios/s390-ccw/cio.c
@@ -0,0 +1,44 @@
+/*
+ * S390 Channel I/O
+ *
+ * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
+ * Copyright (c) 2019 IBM Corp.
+ *
+ * Author(s): Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "libc.h"
+#include "s390-ccw.h"
+#include "cio.h"
+
+static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+
+int enable_mss_facility(void)
+{
+ int ret;
+ ChscAreaSda *sda_area = (ChscAreaSda *) chsc_page;
+
+ memset(sda_area, 0, PAGE_SIZE);
+ sda_area->request.length = 0x0400;
+ sda_area->request.code = 0x0031;
+ sda_area->operation_code = 0x2;
+
+ ret = chsc(sda_area);
+ if ((ret == 0) && (sda_area->response.code == 0x0001)) {
+ return 0;
+ }
+ return -EIO;
+}
+
+void enable_subchannel(SubChannelId schid)
+{
+ Schib schib;
+
+ stsch_err(schid, &schib);
+ schib.pmcw.ena = 1;
+ msch(schid, &schib);
+}
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index ed5b2cbf72db..218fd96ea3a6 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -213,6 +213,9 @@ typedef struct irb {
__u32 emw[8];
} __attribute__ ((packed, aligned(4))) Irb;
+int enable_mss_facility(void);
+void enable_subchannel(SubChannelId schid);
+
/*
* Some S390 specific IO instructions as inline
*/
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 67df42191b94..10f04c69068f 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -10,6 +10,7 @@
#include "libc.h"
#include "s390-ccw.h"
+#include "cio.h"
#include "virtio.h"
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
diff --git a/pc-bios/s390-ccw/netboot.mak b/pc-bios/s390-ccw/netboot.mak
index 14e96b2aa611..5eefb7c28939 100644
--- a/pc-bios/s390-ccw/netboot.mak
+++ b/pc-bios/s390-ccw/netboot.mak
@@ -1,7 +1,7 @@
SLOF_DIR := $(SRC_PATH)/roms/SLOF
-NETOBJS := start.o sclp.o virtio.o virtio-net.o jump2ipl.o netmain.o \
+NETOBJS := start.o sclp.o cio.o virtio.o virtio-net.o jump2ipl.o netmain.o \
libnet.a libc.a
LIBC_INC := -nostdinc -I$(SLOF_DIR)/lib/libc/include
diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index 0392131c27b3..5189c0fc39e5 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -33,6 +33,7 @@
#include <pxelinux.h>
#include "s390-ccw.h"
+#include "cio.h"
#include "virtio.h"
#define DEFAULT_BOOT_RETRIES 10
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 241c6d0b69be..b39ee5d32314 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -72,7 +72,6 @@ unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
bool virtio_is_supported(SubChannelId schid);
void virtio_blk_setup_device(SubChannelId schid);
int virtio_read(ulong sector, void *load_addr);
-int enable_mss_facility(void);
u64 get_clock(void);
ulong get_second(void);
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index cdb66f459e15..aa9da7253fb2 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -10,6 +10,7 @@
#include "libc.h"
#include "s390-ccw.h"
+#include "cio.h"
#include "virtio.h"
#include "virtio-scsi.h"
#include "bswap.h"
@@ -20,8 +21,6 @@ static VRing block[VIRTIO_MAX_VQS];
static char ring_area[VIRTIO_RING_SIZE * VIRTIO_MAX_VQS]
__attribute__((__aligned__(PAGE_SIZE)));
-static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
-
static VDev vdev = {
.nr_vqs = 1,
.vrings = block,
@@ -94,14 +93,9 @@ static int run_ccw(VDev *vdev, int cmd, void *ptr, int len)
{
Ccw1 ccw = {};
CmdOrb orb = {};
- Schib schib;
int r;
- /* start command processing */
- stsch_err(vdev->schid, &schib);
- /* enable the subchannel for IPL device */
- schib.pmcw.ena = 1;
- msch(vdev->schid, &schib);
+ enable_subchannel(vdev->schid);
/* start subchannel command */
orb.fmt = 1;
@@ -343,20 +337,3 @@ bool virtio_is_supported(SubChannelId schid)
}
return false;
}
-
-int enable_mss_facility(void)
-{
- int ret;
- ChscAreaSda *sda_area = (ChscAreaSda *) chsc_page;
-
- memset(sda_area, 0, PAGE_SIZE);
- sda_area->request.length = 0x0400;
- sda_area->request.code = 0x0031;
- sda_area->operation_code = 0x2;
-
- ret = chsc(sda_area);
- if ((ret == 0) && (sda_area->response.code == 0x0001)) {
- return 0;
- }
- return -EIO;
-}
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 05/19] s390-bios: Decouple channel i/o logic from virtio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Create a separate library for channel i/o related code. This decouples
channel i/o operations from virtio and allows us to make use of them for
the real dasd boot path.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-6-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/Makefile | 2 +-
pc-bios/s390-ccw/cio.c | 44 ++++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/cio.h | 3 +++
pc-bios/s390-ccw/main.c | 1 +
pc-bios/s390-ccw/netboot.mak | 2 +-
pc-bios/s390-ccw/netmain.c | 1 +
pc-bios/s390-ccw/s390-ccw.h | 1 -
pc-bios/s390-ccw/virtio.c | 27 ++--------------------
8 files changed, 53 insertions(+), 28 deletions(-)
create mode 100644 pc-bios/s390-ccw/cio.c
diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile
index 1eb316b02f1f..12ad9c1d5813 100644
--- a/pc-bios/s390-ccw/Makefile
+++ b/pc-bios/s390-ccw/Makefile
@@ -10,7 +10,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
.PHONY : all clean build-all
OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \
- virtio.o virtio-scsi.o virtio-blkdev.o libc.o
+ virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o
QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS))
QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float
diff --git a/pc-bios/s390-ccw/cio.c b/pc-bios/s390-ccw/cio.c
new file mode 100644
index 000000000000..87c6b34e88af
--- /dev/null
+++ b/pc-bios/s390-ccw/cio.c
@@ -0,0 +1,44 @@
+/*
+ * S390 Channel I/O
+ *
+ * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
+ * Copyright (c) 2019 IBM Corp.
+ *
+ * Author(s): Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "libc.h"
+#include "s390-ccw.h"
+#include "cio.h"
+
+static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+
+int enable_mss_facility(void)
+{
+ int ret;
+ ChscAreaSda *sda_area = (ChscAreaSda *) chsc_page;
+
+ memset(sda_area, 0, PAGE_SIZE);
+ sda_area->request.length = 0x0400;
+ sda_area->request.code = 0x0031;
+ sda_area->operation_code = 0x2;
+
+ ret = chsc(sda_area);
+ if ((ret == 0) && (sda_area->response.code == 0x0001)) {
+ return 0;
+ }
+ return -EIO;
+}
+
+void enable_subchannel(SubChannelId schid)
+{
+ Schib schib;
+
+ stsch_err(schid, &schib);
+ schib.pmcw.ena = 1;
+ msch(schid, &schib);
+}
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index ed5b2cbf72db..218fd96ea3a6 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -213,6 +213,9 @@ typedef struct irb {
__u32 emw[8];
} __attribute__ ((packed, aligned(4))) Irb;
+int enable_mss_facility(void);
+void enable_subchannel(SubChannelId schid);
+
/*
* Some S390 specific IO instructions as inline
*/
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 67df42191b94..10f04c69068f 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -10,6 +10,7 @@
#include "libc.h"
#include "s390-ccw.h"
+#include "cio.h"
#include "virtio.h"
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
diff --git a/pc-bios/s390-ccw/netboot.mak b/pc-bios/s390-ccw/netboot.mak
index 14e96b2aa611..5eefb7c28939 100644
--- a/pc-bios/s390-ccw/netboot.mak
+++ b/pc-bios/s390-ccw/netboot.mak
@@ -1,7 +1,7 @@
SLOF_DIR := $(SRC_PATH)/roms/SLOF
-NETOBJS := start.o sclp.o virtio.o virtio-net.o jump2ipl.o netmain.o \
+NETOBJS := start.o sclp.o cio.o virtio.o virtio-net.o jump2ipl.o netmain.o \
libnet.a libc.a
LIBC_INC := -nostdinc -I$(SLOF_DIR)/lib/libc/include
diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index 0392131c27b3..5189c0fc39e5 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -33,6 +33,7 @@
#include <pxelinux.h>
#include "s390-ccw.h"
+#include "cio.h"
#include "virtio.h"
#define DEFAULT_BOOT_RETRIES 10
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 241c6d0b69be..b39ee5d32314 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -72,7 +72,6 @@ unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
bool virtio_is_supported(SubChannelId schid);
void virtio_blk_setup_device(SubChannelId schid);
int virtio_read(ulong sector, void *load_addr);
-int enable_mss_facility(void);
u64 get_clock(void);
ulong get_second(void);
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index cdb66f459e15..aa9da7253fb2 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -10,6 +10,7 @@
#include "libc.h"
#include "s390-ccw.h"
+#include "cio.h"
#include "virtio.h"
#include "virtio-scsi.h"
#include "bswap.h"
@@ -20,8 +21,6 @@ static VRing block[VIRTIO_MAX_VQS];
static char ring_area[VIRTIO_RING_SIZE * VIRTIO_MAX_VQS]
__attribute__((__aligned__(PAGE_SIZE)));
-static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
-
static VDev vdev = {
.nr_vqs = 1,
.vrings = block,
@@ -94,14 +93,9 @@ static int run_ccw(VDev *vdev, int cmd, void *ptr, int len)
{
Ccw1 ccw = {};
CmdOrb orb = {};
- Schib schib;
int r;
- /* start command processing */
- stsch_err(vdev->schid, &schib);
- /* enable the subchannel for IPL device */
- schib.pmcw.ena = 1;
- msch(vdev->schid, &schib);
+ enable_subchannel(vdev->schid);
/* start subchannel command */
orb.fmt = 1;
@@ -343,20 +337,3 @@ bool virtio_is_supported(SubChannelId schid)
}
return false;
}
-
-int enable_mss_facility(void)
-{
- int ret;
- ChscAreaSda *sda_area = (ChscAreaSda *) chsc_page;
-
- memset(sda_area, 0, PAGE_SIZE);
- sda_area->request.length = 0x0400;
- sda_area->request.code = 0x0031;
- sda_area->operation_code = 0x2;
-
- ret = chsc(sda_area);
- if ((ret == 0) && (sda_area->response.code == 0x0001)) {
- return 0;
- }
- return -EIO;
-}
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 06/19] s390-bios: Map low core memory
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Create a new header for basic architecture specific definitions and add a
mapping of low core memory. This mapping will be used by the real dasd boot
process.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-7-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 2 +
pc-bios/s390-ccw/s390-arch.h | 90 ++++++++++++++++++++++++++++++++++++
2 files changed, 92 insertions(+)
create mode 100644 pc-bios/s390-ccw/s390-arch.h
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 10f04c69068f..e403b5f733e4 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -9,6 +9,7 @@
*/
#include "libc.h"
+#include "s390-arch.h"
#include "s390-ccw.h"
#include "cio.h"
#include "virtio.h"
@@ -19,6 +20,7 @@ static char loadparm_str[LOADPARM_LEN + 1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
QemuIplParameters qipl;
IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static bool have_iplb;
+LowCore const *lowcore; /* Yes, this *is* a pointer to address 0 */
#define LOADPARM_PROMPT "PROMPT "
#define LOADPARM_EMPTY " "
diff --git a/pc-bios/s390-ccw/s390-arch.h b/pc-bios/s390-ccw/s390-arch.h
new file mode 100644
index 000000000000..5e92c7a27d53
--- /dev/null
+++ b/pc-bios/s390-ccw/s390-arch.h
@@ -0,0 +1,90 @@
+/*
+ * S390 Basic Architecture
+ *
+ * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef S390_ARCH_H
+#define S390_ARCH_H
+
+typedef struct PSW {
+ uint64_t mask;
+ uint64_t addr;
+} __attribute__ ((aligned(8))) PSW;
+_Static_assert(sizeof(struct PSW) == 16, "PSW size incorrect");
+
+/* Older PSW format used by LPSW instruction */
+typedef struct PSWLegacy {
+ uint32_t mask;
+ uint32_t addr;
+} __attribute__ ((aligned(8))) PSWLegacy;
+_Static_assert(sizeof(struct PSWLegacy) == 8, "PSWLegacy size incorrect");
+
+/* s390 psw bit masks */
+#define PSW_MASK_IOINT 0x0200000000000000ULL
+#define PSW_MASK_WAIT 0x0002000000000000ULL
+#define PSW_MASK_EAMODE 0x0000000100000000ULL
+#define PSW_MASK_BAMODE 0x0000000080000000ULL
+#define PSW_MASK_ZMODE (PSW_MASK_EAMODE | PSW_MASK_BAMODE)
+
+/* Low core mapping */
+typedef struct LowCore {
+ /* prefix area: defined by architecture */
+ PSWLegacy ipl_psw; /* 0x000 */
+ uint32_t ccw1[2]; /* 0x008 */
+ uint32_t ccw2[2]; /* 0x010 */
+ uint8_t pad1[0x80 - 0x18]; /* 0x018 */
+ uint32_t ext_params; /* 0x080 */
+ uint16_t cpu_addr; /* 0x084 */
+ uint16_t ext_int_code; /* 0x086 */
+ uint16_t svc_ilen; /* 0x088 */
+ uint16_t svc_code; /* 0x08a */
+ uint16_t pgm_ilen; /* 0x08c */
+ uint16_t pgm_code; /* 0x08e */
+ uint32_t data_exc_code; /* 0x090 */
+ uint16_t mon_class_num; /* 0x094 */
+ uint16_t per_perc_atmid; /* 0x096 */
+ uint64_t per_address; /* 0x098 */
+ uint8_t exc_access_id; /* 0x0a0 */
+ uint8_t per_access_id; /* 0x0a1 */
+ uint8_t op_access_id; /* 0x0a2 */
+ uint8_t ar_access_id; /* 0x0a3 */
+ uint8_t pad2[0xA8 - 0xA4]; /* 0x0a4 */
+ uint64_t trans_exc_code; /* 0x0a8 */
+ uint64_t monitor_code; /* 0x0b0 */
+ uint16_t subchannel_id; /* 0x0b8 */
+ uint16_t subchannel_nr; /* 0x0ba */
+ uint32_t io_int_parm; /* 0x0bc */
+ uint32_t io_int_word; /* 0x0c0 */
+ uint8_t pad3[0xc8 - 0xc4]; /* 0x0c4 */
+ uint32_t stfl_fac_list; /* 0x0c8 */
+ uint8_t pad4[0xe8 - 0xcc]; /* 0x0cc */
+ uint64_t mcic; /* 0x0e8 */
+ uint8_t pad5[0xf4 - 0xf0]; /* 0x0f0 */
+ uint32_t external_damage_code; /* 0x0f4 */
+ uint64_t failing_storage_address; /* 0x0f8 */
+ uint8_t pad6[0x110 - 0x100]; /* 0x100 */
+ uint64_t per_breaking_event_addr; /* 0x110 */
+ uint8_t pad7[0x120 - 0x118]; /* 0x118 */
+ PSW restart_old_psw; /* 0x120 */
+ PSW external_old_psw; /* 0x130 */
+ PSW svc_old_psw; /* 0x140 */
+ PSW program_old_psw; /* 0x150 */
+ PSW mcck_old_psw; /* 0x160 */
+ PSW io_old_psw; /* 0x170 */
+ uint8_t pad8[0x1a0 - 0x180]; /* 0x180 */
+ PSW restart_new_psw; /* 0x1a0 */
+ PSW external_new_psw; /* 0x1b0 */
+ PSW svc_new_psw; /* 0x1c0 */
+ PSW program_new_psw; /* 0x1d0 */
+ PSW mcck_new_psw; /* 0x1e0 */
+ PSW io_new_psw; /* 0x1f0 */
+} __attribute__((packed, aligned(8192))) LowCore;
+
+extern LowCore const *lowcore;
+
+#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 06/19] s390-bios: Map low core memory
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Create a new header for basic architecture specific definitions and add a
mapping of low core memory. This mapping will be used by the real dasd boot
process.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-7-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 2 +
pc-bios/s390-ccw/s390-arch.h | 90 ++++++++++++++++++++++++++++++++++++
2 files changed, 92 insertions(+)
create mode 100644 pc-bios/s390-ccw/s390-arch.h
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 10f04c69068f..e403b5f733e4 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -9,6 +9,7 @@
*/
#include "libc.h"
+#include "s390-arch.h"
#include "s390-ccw.h"
#include "cio.h"
#include "virtio.h"
@@ -19,6 +20,7 @@ static char loadparm_str[LOADPARM_LEN + 1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
QemuIplParameters qipl;
IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static bool have_iplb;
+LowCore const *lowcore; /* Yes, this *is* a pointer to address 0 */
#define LOADPARM_PROMPT "PROMPT "
#define LOADPARM_EMPTY " "
diff --git a/pc-bios/s390-ccw/s390-arch.h b/pc-bios/s390-ccw/s390-arch.h
new file mode 100644
index 000000000000..5e92c7a27d53
--- /dev/null
+++ b/pc-bios/s390-ccw/s390-arch.h
@@ -0,0 +1,90 @@
+/*
+ * S390 Basic Architecture
+ *
+ * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef S390_ARCH_H
+#define S390_ARCH_H
+
+typedef struct PSW {
+ uint64_t mask;
+ uint64_t addr;
+} __attribute__ ((aligned(8))) PSW;
+_Static_assert(sizeof(struct PSW) == 16, "PSW size incorrect");
+
+/* Older PSW format used by LPSW instruction */
+typedef struct PSWLegacy {
+ uint32_t mask;
+ uint32_t addr;
+} __attribute__ ((aligned(8))) PSWLegacy;
+_Static_assert(sizeof(struct PSWLegacy) == 8, "PSWLegacy size incorrect");
+
+/* s390 psw bit masks */
+#define PSW_MASK_IOINT 0x0200000000000000ULL
+#define PSW_MASK_WAIT 0x0002000000000000ULL
+#define PSW_MASK_EAMODE 0x0000000100000000ULL
+#define PSW_MASK_BAMODE 0x0000000080000000ULL
+#define PSW_MASK_ZMODE (PSW_MASK_EAMODE | PSW_MASK_BAMODE)
+
+/* Low core mapping */
+typedef struct LowCore {
+ /* prefix area: defined by architecture */
+ PSWLegacy ipl_psw; /* 0x000 */
+ uint32_t ccw1[2]; /* 0x008 */
+ uint32_t ccw2[2]; /* 0x010 */
+ uint8_t pad1[0x80 - 0x18]; /* 0x018 */
+ uint32_t ext_params; /* 0x080 */
+ uint16_t cpu_addr; /* 0x084 */
+ uint16_t ext_int_code; /* 0x086 */
+ uint16_t svc_ilen; /* 0x088 */
+ uint16_t svc_code; /* 0x08a */
+ uint16_t pgm_ilen; /* 0x08c */
+ uint16_t pgm_code; /* 0x08e */
+ uint32_t data_exc_code; /* 0x090 */
+ uint16_t mon_class_num; /* 0x094 */
+ uint16_t per_perc_atmid; /* 0x096 */
+ uint64_t per_address; /* 0x098 */
+ uint8_t exc_access_id; /* 0x0a0 */
+ uint8_t per_access_id; /* 0x0a1 */
+ uint8_t op_access_id; /* 0x0a2 */
+ uint8_t ar_access_id; /* 0x0a3 */
+ uint8_t pad2[0xA8 - 0xA4]; /* 0x0a4 */
+ uint64_t trans_exc_code; /* 0x0a8 */
+ uint64_t monitor_code; /* 0x0b0 */
+ uint16_t subchannel_id; /* 0x0b8 */
+ uint16_t subchannel_nr; /* 0x0ba */
+ uint32_t io_int_parm; /* 0x0bc */
+ uint32_t io_int_word; /* 0x0c0 */
+ uint8_t pad3[0xc8 - 0xc4]; /* 0x0c4 */
+ uint32_t stfl_fac_list; /* 0x0c8 */
+ uint8_t pad4[0xe8 - 0xcc]; /* 0x0cc */
+ uint64_t mcic; /* 0x0e8 */
+ uint8_t pad5[0xf4 - 0xf0]; /* 0x0f0 */
+ uint32_t external_damage_code; /* 0x0f4 */
+ uint64_t failing_storage_address; /* 0x0f8 */
+ uint8_t pad6[0x110 - 0x100]; /* 0x100 */
+ uint64_t per_breaking_event_addr; /* 0x110 */
+ uint8_t pad7[0x120 - 0x118]; /* 0x118 */
+ PSW restart_old_psw; /* 0x120 */
+ PSW external_old_psw; /* 0x130 */
+ PSW svc_old_psw; /* 0x140 */
+ PSW program_old_psw; /* 0x150 */
+ PSW mcck_old_psw; /* 0x160 */
+ PSW io_old_psw; /* 0x170 */
+ uint8_t pad8[0x1a0 - 0x180]; /* 0x180 */
+ PSW restart_new_psw; /* 0x1a0 */
+ PSW external_new_psw; /* 0x1b0 */
+ PSW svc_new_psw; /* 0x1c0 */
+ PSW program_new_psw; /* 0x1d0 */
+ PSW mcck_new_psw; /* 0x1e0 */
+ PSW io_new_psw; /* 0x1f0 */
+} __attribute__((packed, aligned(8192))) LowCore;
+
+extern LowCore const *lowcore;
+
+#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 07/19] s390-bios: ptr2u32 and u32toptr
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Introduce inline functions to convert between pointers and unsigned 32-bit
ints. These are used to hide the ugliness required to avoid compiler
warnings.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-8-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/helper.h | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 pc-bios/s390-ccw/helper.h
diff --git a/pc-bios/s390-ccw/helper.h b/pc-bios/s390-ccw/helper.h
new file mode 100644
index 000000000000..78d5bc74421b
--- /dev/null
+++ b/pc-bios/s390-ccw/helper.h
@@ -0,0 +1,31 @@
+/*
+ * Helper Functions
+ *
+ * Copyright (c) 2019 IBM Corp.
+ *
+ * Author(s): Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef S390_CCW_HELPER_H
+#define S390_CCW_HELPER_H
+
+#include "s390-ccw.h"
+
+/* Avoids compiler warnings when casting a pointer to a u32 */
+static inline uint32_t ptr2u32(void *ptr)
+{
+ IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large");
+ return (uint32_t)(uint64_t)ptr;
+}
+
+/* Avoids compiler warnings when casting a u32 to a pointer */
+static inline void *u32toptr(uint32_t n)
+{
+ return (void *)(uint64_t)n;
+}
+
+#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 07/19] s390-bios: ptr2u32 and u32toptr
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Introduce inline functions to convert between pointers and unsigned 32-bit
ints. These are used to hide the ugliness required to avoid compiler
warnings.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-8-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/helper.h | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 pc-bios/s390-ccw/helper.h
diff --git a/pc-bios/s390-ccw/helper.h b/pc-bios/s390-ccw/helper.h
new file mode 100644
index 000000000000..78d5bc74421b
--- /dev/null
+++ b/pc-bios/s390-ccw/helper.h
@@ -0,0 +1,31 @@
+/*
+ * Helper Functions
+ *
+ * Copyright (c) 2019 IBM Corp.
+ *
+ * Author(s): Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef S390_CCW_HELPER_H
+#define S390_CCW_HELPER_H
+
+#include "s390-ccw.h"
+
+/* Avoids compiler warnings when casting a pointer to a u32 */
+static inline uint32_t ptr2u32(void *ptr)
+{
+ IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large");
+ return (uint32_t)(uint64_t)ptr;
+}
+
+/* Avoids compiler warnings when casting a u32 to a pointer */
+static inline void *u32toptr(uint32_t n)
+{
+ return (void *)(uint64_t)n;
+}
+
+#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 08/19] s390-bios: Support for running format-0/1 channel programs
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Introduce a library function for executing format-0 and format-1
channel programs and waiting for their completion before continuing
execution.
Add cu_type() to channel io library. This will be used to query control
unit type which is used to determine if we are booting a virtio device or a
real dasd device.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Message-Id: <1554388475-18329-9-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.c | 144 ++++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/cio.h | 130 +++++++++++++++++++++++++++++++-
pc-bios/s390-ccw/s390-ccw.h | 1 +
pc-bios/s390-ccw/start.S | 29 ++++++++
4 files changed, 301 insertions(+), 3 deletions(-)
diff --git a/pc-bios/s390-ccw/cio.c b/pc-bios/s390-ccw/cio.c
index 87c6b34e88af..c43e50b00b8e 100644
--- a/pc-bios/s390-ccw/cio.c
+++ b/pc-bios/s390-ccw/cio.c
@@ -13,10 +13,14 @@
#include "libc.h"
#include "s390-ccw.h"
+#include "s390-arch.h"
+#include "helper.h"
#include "cio.h"
static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+static int __do_cio(SubChannelId schid, uint32_t ccw_addr, int fmt, Irb *irb);
+
int enable_mss_facility(void)
{
int ret;
@@ -42,3 +46,143 @@ void enable_subchannel(SubChannelId schid)
schib.pmcw.ena = 1;
msch(schid, &schib);
}
+
+uint16_t cu_type(SubChannelId schid)
+{
+ Ccw1 sense_id_ccw;
+ SenseId sense_data;
+
+ sense_id_ccw.cmd_code = CCW_CMD_SENSE_ID;
+ sense_id_ccw.cda = ptr2u32(&sense_data);
+ sense_id_ccw.count = sizeof(sense_data);
+ sense_id_ccw.flags |= CCW_FLAG_SLI;
+
+ if (do_cio(schid, CU_TYPE_UNKNOWN, ptr2u32(&sense_id_ccw), CCW_FMT1)) {
+ panic("Failed to run SenseID CCw\n");
+ }
+
+ return sense_data.cu_type;
+}
+
+int basic_sense(SubChannelId schid, uint16_t cutype, void *sense_data,
+ uint16_t data_size)
+{
+ Ccw1 senseCcw;
+ Irb irb;
+
+ senseCcw.cmd_code = CCW_CMD_BASIC_SENSE;
+ senseCcw.cda = ptr2u32(sense_data);
+ senseCcw.count = data_size;
+
+ return __do_cio(schid, ptr2u32(&senseCcw), CCW_FMT1, &irb);
+}
+
+static bool irb_error(Irb *irb)
+{
+ if (irb->scsw.cstat) {
+ return true;
+ }
+ return irb->scsw.dstat != (SCSW_DSTAT_DEVEND | SCSW_DSTAT_CHEND);
+}
+
+/*
+ * Handles executing ssch, tsch and returns the irb obtained from tsch.
+ * Returns 0 on success, -1 if unexpected status pending and we need to retry,
+ * otherwise returns condition code from ssch/tsch for error cases.
+ */
+static int __do_cio(SubChannelId schid, uint32_t ccw_addr, int fmt, Irb *irb)
+{
+ CmdOrb orb = {};
+ int rc;
+
+ IPL_assert(fmt == 0 || fmt == 1, "Invalid ccw format");
+
+ /* ccw_addr must be <= 24 bits and point to at least one whole ccw. */
+ if (fmt == 0) {
+ IPL_assert(ccw_addr <= 0xFFFFFF - 8, "Invalid ccw address");
+ }
+
+ orb.fmt = fmt;
+ orb.pfch = 1; /* QEMU's cio implementation requires prefetch */
+ orb.c64 = 1; /* QEMU's cio implementation requires 64-bit idaws */
+ orb.lpm = 0xFF; /* All paths allowed */
+ orb.cpa = ccw_addr;
+
+ rc = ssch(schid, &orb);
+ if (rc == 1 || rc == 2) {
+ /* Subchannel status pending or busy. Eat status and ask for retry. */
+ tsch(schid, irb);
+ return -1;
+ }
+ if (rc) {
+ print_int("ssch failed with cc=", rc);
+ return rc;
+ }
+
+ consume_io_int();
+
+ /* collect status */
+ rc = tsch(schid, irb);
+ if (rc) {
+ print_int("tsch failed with cc=", rc);
+ }
+
+ return rc;
+}
+
+/*
+ * Executes a channel program at a given subchannel. The request to run the
+ * channel program is sent to the subchannel, we then wait for the interrupt
+ * signaling completion of the I/O operation(s) performed by the channel
+ * program. Lastly we verify that the i/o operation completed without error and
+ * that the interrupt we received was for the subchannel used to run the
+ * channel program.
+ *
+ * Note: This function assumes it is running in an environment where no other
+ * cpus are generating or receiving I/O interrupts. So either run it in a
+ * single-cpu environment or make sure all other cpus are not doing I/O and
+ * have I/O interrupts masked off. We also assume that only one device is
+ * active (generating i/o interrupts).
+ *
+ * Returns non-zero on error.
+ */
+int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt)
+{
+ Irb irb = {};
+ SenseDataEckdDasd sd;
+ int rc, retries = 0;
+
+ while (true) {
+ rc = __do_cio(schid, ccw_addr, fmt, &irb);
+
+ if (rc == -1) {
+ retries++;
+ continue;
+ }
+ if (rc) {
+ /* ssch/tsch error. Message already reported by __do_cio */
+ break;
+ }
+
+ if (!irb_error(&irb)) {
+ break;
+ }
+
+ /*
+ * Unexpected unit check, or interface-control-check. Use sense to
+ * clear (unit check only) then retry.
+ */
+ if ((unit_check(&irb) || iface_ctrl_check(&irb)) && retries <= 2) {
+ if (unit_check(&irb)) {
+ basic_sense(schid, cutype, &sd, sizeof(sd));
+ }
+ retries++;
+ continue;
+ }
+
+ rc = -1;
+ break;
+ }
+
+ return rc;
+}
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index 218fd96ea3a6..1637e32070f3 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -70,9 +70,46 @@ struct scsw {
__u16 count;
} __attribute__ ((packed));
-#define SCSW_FCTL_CLEAR_FUNC 0x1000
-#define SCSW_FCTL_HALT_FUNC 0x2000
+/* Function Control */
#define SCSW_FCTL_START_FUNC 0x4000
+#define SCSW_FCTL_HALT_FUNC 0x2000
+#define SCSW_FCTL_CLEAR_FUNC 0x1000
+
+/* Activity Control */
+#define SCSW_ACTL_RESUME_PEND 0x0800
+#define SCSW_ACTL_START_PEND 0x0400
+#define SCSW_ACTL_HALT_PEND 0x0200
+#define SCSW_ACTL_CLEAR_PEND 0x0100
+#define SCSW_ACTL_CH_ACTIVE 0x0080
+#define SCSW_ACTL_DEV_ACTIVE 0x0040
+#define SCSW_ACTL_SUSPENDED 0x0020
+
+/* Status Control */
+#define SCSW_SCTL_ALERT 0x0010
+#define SCSW_SCTL_INTERMED 0x0008
+#define SCSW_SCTL_PRIMARY 0x0004
+#define SCSW_SCTL_SECONDARY 0x0002
+#define SCSW_SCTL_STATUS_PEND 0x0001
+
+/* SCSW Device Status Flags */
+#define SCSW_DSTAT_ATTN 0x80
+#define SCSW_DSTAT_STATMOD 0x40
+#define SCSW_DSTAT_CUEND 0x20
+#define SCSW_DSTAT_BUSY 0x10
+#define SCSW_DSTAT_CHEND 0x08
+#define SCSW_DSTAT_DEVEND 0x04
+#define SCSW_DSTAT_UCHK 0x02
+#define SCSW_DSTAT_UEXCP 0x01
+
+/* SCSW Subchannel Status Flags */
+#define SCSW_CSTAT_PCINT 0x80
+#define SCSW_CSTAT_BADLEN 0x40
+#define SCSW_CSTAT_PROGCHK 0x20
+#define SCSW_CSTAT_PROTCHK 0x10
+#define SCSW_CSTAT_CHDCHK 0x08
+#define SCSW_CSTAT_CHCCHK 0x04
+#define SCSW_CSTAT_ICCHK 0x02
+#define SCSW_CSTAT_CHAINCHK 0x01
/*
* subchannel information block
@@ -127,7 +164,23 @@ struct tpi_info {
__u32 reserved4:12;
} __attribute__ ((packed, aligned(4)));
-/* channel command word (type 1) */
+/* channel command word (format 0) */
+typedef struct ccw0 {
+ __u8 cmd_code;
+ __u32 cda:24;
+ __u32 chainData:1;
+ __u32 chain:1;
+ __u32 sli:1;
+ __u32 skip:1;
+ __u32 pci:1;
+ __u32 ida:1;
+ __u32 suspend:1;
+ __u32 mida:1;
+ __u8 reserved;
+ __u16 count;
+} __attribute__ ((packed, aligned(8))) Ccw0;
+
+/* channel command word (format 1) */
typedef struct ccw1 {
__u8 cmd_code;
__u8 flags;
@@ -135,6 +188,10 @@ typedef struct ccw1 {
__u32 cda;
} __attribute__ ((packed, aligned(8))) Ccw1;
+/* do_cio() CCW formats */
+#define CCW_FMT0 0x00
+#define CCW_FMT1 0x01
+
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
#define CCW_FLAG_SLI 0x20
@@ -190,6 +247,11 @@ struct ciw {
__u16 count;
};
+#define CU_TYPE_UNKNOWN 0x0000
+#define CU_TYPE_DASD_2107 0x2107
+#define CU_TYPE_VIRTIO 0x3832
+#define CU_TYPE_DASD_3990 0x3990
+
/*
* sense-id response buffer layout
*/
@@ -205,6 +267,64 @@ typedef struct senseid {
struct ciw ciw[62];
} __attribute__ ((packed, aligned(4))) SenseId;
+/*
+ * architected values for first sense byte - common_status. Bits 0-5 of this
+ * field are common to all device types.
+ */
+#define SNS_STAT0_CMD_REJECT 0x80
+#define SNS_STAT0_INTERVENTION_REQ 0x40
+#define SNS_STAT0_BUS_OUT_CHECK 0x20
+#define SNS_STAT0_EQUIPMENT_CHECK 0x10
+#define SNS_STAT0_DATA_CHECK 0x08
+#define SNS_STAT0_OVERRUN 0x04
+#define SNS_STAT0_INCOMPL_DOMAIN 0x01
+
+/* ECKD DASD status[0] byte */
+#define SNS_STAT1_PERM_ERR 0x80
+#define SNS_STAT1_INV_TRACK_FORMAT 0x40
+#define SNS_STAT1_EOC 0x20
+#define SNS_STAT1_MESSAGE_TO_OPER 0x10
+#define SNS_STAT1_NO_REC_FOUND 0x08
+#define SNS_STAT1_FILE_PROTECTED 0x04
+#define SNS_STAT1_WRITE_INHIBITED 0x02
+#define SNS_STAT1_IMPRECISE_END 0x01
+
+/* ECKD DASD status[1] byte */
+#define SNS_STAT2_REQ_INH_WRITE 0x80
+#define SNS_STAT2_CORRECTABLE 0x40
+#define SNS_STAT2_FIRST_LOG_ERR 0x20
+#define SNS_STAT2_ENV_DATA_PRESENT 0x10
+#define SNS_STAT2_IMPRECISE_END 0x04
+
+/* ECKD DASD 24-byte Sense fmt_msg codes */
+#define SENSE24_FMT_PROG_SYS 0x0
+#define SENSE24_FMT_EQUIPMENT 0x2
+#define SENSE24_FMT_CONTROLLER 0x3
+#define SENSE24_FMT_MISC 0xF
+
+/* basic sense response buffer layout */
+typedef struct SenseDataEckdDasd {
+ uint8_t common_status;
+ uint8_t status[2];
+ uint8_t res_count;
+ uint8_t phys_drive_id;
+ uint8_t low_cyl_addr;
+ uint8_t head_high_cyl_addr;
+ uint8_t fmt_msg;
+ uint64_t fmt_dependent_info[2];
+ uint8_t reserved;
+ uint8_t program_action_code;
+ uint16_t config_info;
+ uint8_t mcode_hicyl;
+ uint8_t cyl_head_addr[3];
+} __attribute__ ((packed, aligned(4))) SenseDataEckdDasd;
+
+#define ECKD_SENSE24_GET_FMT(sd) (sd->fmt_msg & 0xF0 >> 4)
+#define ECKD_SENSE24_GET_MSG(sd) (sd->fmt_msg & 0x0F)
+
+#define unit_check(irb) ((irb)->scsw.dstat & SCSW_DSTAT_UCHK)
+#define iface_ctrl_check(irb) ((irb)->scsw.cstat & SCSW_CSTAT_ICCHK)
+
/* interruption response block */
typedef struct irb {
struct scsw scsw;
@@ -215,6 +335,10 @@ typedef struct irb {
int enable_mss_facility(void);
void enable_subchannel(SubChannelId schid);
+uint16_t cu_type(SubChannelId schid);
+int basic_sense(SubChannelId schid, uint16_t cutype, void *sense_data,
+ uint16_t data_size);
+int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt);
/*
* Some S390 specific IO instructions as inline
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index b39ee5d32314..11bce7d73c85 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -52,6 +52,7 @@ typedef unsigned long long __u64;
/* start.s */
void disabled_wait(void);
void consume_sclp_int(void);
+void consume_io_int(void);
/* main.c */
void panic(const char *string);
diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S
index 5c22cb0849d3..aa8fceb19da2 100644
--- a/pc-bios/s390-ccw/start.S
+++ b/pc-bios/s390-ccw/start.S
@@ -71,6 +71,26 @@ consume_sclp_int:
larl %r1, enabled_wait_psw
lpswe 0(%r1)
+/*
+ * void consume_io_int(void)
+ *
+ * eats one I/O interrupt
+ */
+ .globl consume_io_int
+consume_io_int:
+ /* enable I/O interrupts in cr6 */
+ stctg %c6,%c6,0(%r15)
+ oi 4(%r15), 0xff
+ lctlg %c6,%c6,0(%r15)
+ /* prepare i/o call handler */
+ larl %r1, io_new_code
+ stg %r1, 0x1f8
+ larl %r1, io_new_mask
+ mvc 0x1f0(8),0(%r1)
+ /* load enabled wait PSW */
+ larl %r1, enabled_wait_psw
+ lpswe 0(%r1)
+
external_new_code:
/* disable service interrupts in cr0 */
stctg %c0,%c0,0(%r15)
@@ -78,6 +98,13 @@ external_new_code:
lctlg %c0,%c0,0(%r15)
br %r14
+io_new_code:
+ /* disable I/O interrupts in cr6 */
+ stctg %c6,%c6,0(%r15)
+ ni 4(%r15), 0x00
+ lctlg %c6,%c6,0(%r15)
+ br %r14
+
.align 8
disabled_wait_psw:
.quad 0x0002000180000000,0x0000000000000000
@@ -85,3 +112,5 @@ enabled_wait_psw:
.quad 0x0302000180000000,0x0000000000000000
external_new_mask:
.quad 0x0000000180000000
+io_new_mask:
+ .quad 0x0000000180000000
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 08/19] s390-bios: Support for running format-0/1 channel programs
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Introduce a library function for executing format-0 and format-1
channel programs and waiting for their completion before continuing
execution.
Add cu_type() to channel io library. This will be used to query control
unit type which is used to determine if we are booting a virtio device or a
real dasd device.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Message-Id: <1554388475-18329-9-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.c | 144 ++++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/cio.h | 130 +++++++++++++++++++++++++++++++-
pc-bios/s390-ccw/s390-ccw.h | 1 +
pc-bios/s390-ccw/start.S | 29 ++++++++
4 files changed, 301 insertions(+), 3 deletions(-)
diff --git a/pc-bios/s390-ccw/cio.c b/pc-bios/s390-ccw/cio.c
index 87c6b34e88af..c43e50b00b8e 100644
--- a/pc-bios/s390-ccw/cio.c
+++ b/pc-bios/s390-ccw/cio.c
@@ -13,10 +13,14 @@
#include "libc.h"
#include "s390-ccw.h"
+#include "s390-arch.h"
+#include "helper.h"
#include "cio.h"
static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+static int __do_cio(SubChannelId schid, uint32_t ccw_addr, int fmt, Irb *irb);
+
int enable_mss_facility(void)
{
int ret;
@@ -42,3 +46,143 @@ void enable_subchannel(SubChannelId schid)
schib.pmcw.ena = 1;
msch(schid, &schib);
}
+
+uint16_t cu_type(SubChannelId schid)
+{
+ Ccw1 sense_id_ccw;
+ SenseId sense_data;
+
+ sense_id_ccw.cmd_code = CCW_CMD_SENSE_ID;
+ sense_id_ccw.cda = ptr2u32(&sense_data);
+ sense_id_ccw.count = sizeof(sense_data);
+ sense_id_ccw.flags |= CCW_FLAG_SLI;
+
+ if (do_cio(schid, CU_TYPE_UNKNOWN, ptr2u32(&sense_id_ccw), CCW_FMT1)) {
+ panic("Failed to run SenseID CCw\n");
+ }
+
+ return sense_data.cu_type;
+}
+
+int basic_sense(SubChannelId schid, uint16_t cutype, void *sense_data,
+ uint16_t data_size)
+{
+ Ccw1 senseCcw;
+ Irb irb;
+
+ senseCcw.cmd_code = CCW_CMD_BASIC_SENSE;
+ senseCcw.cda = ptr2u32(sense_data);
+ senseCcw.count = data_size;
+
+ return __do_cio(schid, ptr2u32(&senseCcw), CCW_FMT1, &irb);
+}
+
+static bool irb_error(Irb *irb)
+{
+ if (irb->scsw.cstat) {
+ return true;
+ }
+ return irb->scsw.dstat != (SCSW_DSTAT_DEVEND | SCSW_DSTAT_CHEND);
+}
+
+/*
+ * Handles executing ssch, tsch and returns the irb obtained from tsch.
+ * Returns 0 on success, -1 if unexpected status pending and we need to retry,
+ * otherwise returns condition code from ssch/tsch for error cases.
+ */
+static int __do_cio(SubChannelId schid, uint32_t ccw_addr, int fmt, Irb *irb)
+{
+ CmdOrb orb = {};
+ int rc;
+
+ IPL_assert(fmt == 0 || fmt == 1, "Invalid ccw format");
+
+ /* ccw_addr must be <= 24 bits and point to at least one whole ccw. */
+ if (fmt == 0) {
+ IPL_assert(ccw_addr <= 0xFFFFFF - 8, "Invalid ccw address");
+ }
+
+ orb.fmt = fmt;
+ orb.pfch = 1; /* QEMU's cio implementation requires prefetch */
+ orb.c64 = 1; /* QEMU's cio implementation requires 64-bit idaws */
+ orb.lpm = 0xFF; /* All paths allowed */
+ orb.cpa = ccw_addr;
+
+ rc = ssch(schid, &orb);
+ if (rc == 1 || rc == 2) {
+ /* Subchannel status pending or busy. Eat status and ask for retry. */
+ tsch(schid, irb);
+ return -1;
+ }
+ if (rc) {
+ print_int("ssch failed with cc=", rc);
+ return rc;
+ }
+
+ consume_io_int();
+
+ /* collect status */
+ rc = tsch(schid, irb);
+ if (rc) {
+ print_int("tsch failed with cc=", rc);
+ }
+
+ return rc;
+}
+
+/*
+ * Executes a channel program at a given subchannel. The request to run the
+ * channel program is sent to the subchannel, we then wait for the interrupt
+ * signaling completion of the I/O operation(s) performed by the channel
+ * program. Lastly we verify that the i/o operation completed without error and
+ * that the interrupt we received was for the subchannel used to run the
+ * channel program.
+ *
+ * Note: This function assumes it is running in an environment where no other
+ * cpus are generating or receiving I/O interrupts. So either run it in a
+ * single-cpu environment or make sure all other cpus are not doing I/O and
+ * have I/O interrupts masked off. We also assume that only one device is
+ * active (generating i/o interrupts).
+ *
+ * Returns non-zero on error.
+ */
+int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt)
+{
+ Irb irb = {};
+ SenseDataEckdDasd sd;
+ int rc, retries = 0;
+
+ while (true) {
+ rc = __do_cio(schid, ccw_addr, fmt, &irb);
+
+ if (rc == -1) {
+ retries++;
+ continue;
+ }
+ if (rc) {
+ /* ssch/tsch error. Message already reported by __do_cio */
+ break;
+ }
+
+ if (!irb_error(&irb)) {
+ break;
+ }
+
+ /*
+ * Unexpected unit check, or interface-control-check. Use sense to
+ * clear (unit check only) then retry.
+ */
+ if ((unit_check(&irb) || iface_ctrl_check(&irb)) && retries <= 2) {
+ if (unit_check(&irb)) {
+ basic_sense(schid, cutype, &sd, sizeof(sd));
+ }
+ retries++;
+ continue;
+ }
+
+ rc = -1;
+ break;
+ }
+
+ return rc;
+}
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index 218fd96ea3a6..1637e32070f3 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -70,9 +70,46 @@ struct scsw {
__u16 count;
} __attribute__ ((packed));
-#define SCSW_FCTL_CLEAR_FUNC 0x1000
-#define SCSW_FCTL_HALT_FUNC 0x2000
+/* Function Control */
#define SCSW_FCTL_START_FUNC 0x4000
+#define SCSW_FCTL_HALT_FUNC 0x2000
+#define SCSW_FCTL_CLEAR_FUNC 0x1000
+
+/* Activity Control */
+#define SCSW_ACTL_RESUME_PEND 0x0800
+#define SCSW_ACTL_START_PEND 0x0400
+#define SCSW_ACTL_HALT_PEND 0x0200
+#define SCSW_ACTL_CLEAR_PEND 0x0100
+#define SCSW_ACTL_CH_ACTIVE 0x0080
+#define SCSW_ACTL_DEV_ACTIVE 0x0040
+#define SCSW_ACTL_SUSPENDED 0x0020
+
+/* Status Control */
+#define SCSW_SCTL_ALERT 0x0010
+#define SCSW_SCTL_INTERMED 0x0008
+#define SCSW_SCTL_PRIMARY 0x0004
+#define SCSW_SCTL_SECONDARY 0x0002
+#define SCSW_SCTL_STATUS_PEND 0x0001
+
+/* SCSW Device Status Flags */
+#define SCSW_DSTAT_ATTN 0x80
+#define SCSW_DSTAT_STATMOD 0x40
+#define SCSW_DSTAT_CUEND 0x20
+#define SCSW_DSTAT_BUSY 0x10
+#define SCSW_DSTAT_CHEND 0x08
+#define SCSW_DSTAT_DEVEND 0x04
+#define SCSW_DSTAT_UCHK 0x02
+#define SCSW_DSTAT_UEXCP 0x01
+
+/* SCSW Subchannel Status Flags */
+#define SCSW_CSTAT_PCINT 0x80
+#define SCSW_CSTAT_BADLEN 0x40
+#define SCSW_CSTAT_PROGCHK 0x20
+#define SCSW_CSTAT_PROTCHK 0x10
+#define SCSW_CSTAT_CHDCHK 0x08
+#define SCSW_CSTAT_CHCCHK 0x04
+#define SCSW_CSTAT_ICCHK 0x02
+#define SCSW_CSTAT_CHAINCHK 0x01
/*
* subchannel information block
@@ -127,7 +164,23 @@ struct tpi_info {
__u32 reserved4:12;
} __attribute__ ((packed, aligned(4)));
-/* channel command word (type 1) */
+/* channel command word (format 0) */
+typedef struct ccw0 {
+ __u8 cmd_code;
+ __u32 cda:24;
+ __u32 chainData:1;
+ __u32 chain:1;
+ __u32 sli:1;
+ __u32 skip:1;
+ __u32 pci:1;
+ __u32 ida:1;
+ __u32 suspend:1;
+ __u32 mida:1;
+ __u8 reserved;
+ __u16 count;
+} __attribute__ ((packed, aligned(8))) Ccw0;
+
+/* channel command word (format 1) */
typedef struct ccw1 {
__u8 cmd_code;
__u8 flags;
@@ -135,6 +188,10 @@ typedef struct ccw1 {
__u32 cda;
} __attribute__ ((packed, aligned(8))) Ccw1;
+/* do_cio() CCW formats */
+#define CCW_FMT0 0x00
+#define CCW_FMT1 0x01
+
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
#define CCW_FLAG_SLI 0x20
@@ -190,6 +247,11 @@ struct ciw {
__u16 count;
};
+#define CU_TYPE_UNKNOWN 0x0000
+#define CU_TYPE_DASD_2107 0x2107
+#define CU_TYPE_VIRTIO 0x3832
+#define CU_TYPE_DASD_3990 0x3990
+
/*
* sense-id response buffer layout
*/
@@ -205,6 +267,64 @@ typedef struct senseid {
struct ciw ciw[62];
} __attribute__ ((packed, aligned(4))) SenseId;
+/*
+ * architected values for first sense byte - common_status. Bits 0-5 of this
+ * field are common to all device types.
+ */
+#define SNS_STAT0_CMD_REJECT 0x80
+#define SNS_STAT0_INTERVENTION_REQ 0x40
+#define SNS_STAT0_BUS_OUT_CHECK 0x20
+#define SNS_STAT0_EQUIPMENT_CHECK 0x10
+#define SNS_STAT0_DATA_CHECK 0x08
+#define SNS_STAT0_OVERRUN 0x04
+#define SNS_STAT0_INCOMPL_DOMAIN 0x01
+
+/* ECKD DASD status[0] byte */
+#define SNS_STAT1_PERM_ERR 0x80
+#define SNS_STAT1_INV_TRACK_FORMAT 0x40
+#define SNS_STAT1_EOC 0x20
+#define SNS_STAT1_MESSAGE_TO_OPER 0x10
+#define SNS_STAT1_NO_REC_FOUND 0x08
+#define SNS_STAT1_FILE_PROTECTED 0x04
+#define SNS_STAT1_WRITE_INHIBITED 0x02
+#define SNS_STAT1_IMPRECISE_END 0x01
+
+/* ECKD DASD status[1] byte */
+#define SNS_STAT2_REQ_INH_WRITE 0x80
+#define SNS_STAT2_CORRECTABLE 0x40
+#define SNS_STAT2_FIRST_LOG_ERR 0x20
+#define SNS_STAT2_ENV_DATA_PRESENT 0x10
+#define SNS_STAT2_IMPRECISE_END 0x04
+
+/* ECKD DASD 24-byte Sense fmt_msg codes */
+#define SENSE24_FMT_PROG_SYS 0x0
+#define SENSE24_FMT_EQUIPMENT 0x2
+#define SENSE24_FMT_CONTROLLER 0x3
+#define SENSE24_FMT_MISC 0xF
+
+/* basic sense response buffer layout */
+typedef struct SenseDataEckdDasd {
+ uint8_t common_status;
+ uint8_t status[2];
+ uint8_t res_count;
+ uint8_t phys_drive_id;
+ uint8_t low_cyl_addr;
+ uint8_t head_high_cyl_addr;
+ uint8_t fmt_msg;
+ uint64_t fmt_dependent_info[2];
+ uint8_t reserved;
+ uint8_t program_action_code;
+ uint16_t config_info;
+ uint8_t mcode_hicyl;
+ uint8_t cyl_head_addr[3];
+} __attribute__ ((packed, aligned(4))) SenseDataEckdDasd;
+
+#define ECKD_SENSE24_GET_FMT(sd) (sd->fmt_msg & 0xF0 >> 4)
+#define ECKD_SENSE24_GET_MSG(sd) (sd->fmt_msg & 0x0F)
+
+#define unit_check(irb) ((irb)->scsw.dstat & SCSW_DSTAT_UCHK)
+#define iface_ctrl_check(irb) ((irb)->scsw.cstat & SCSW_CSTAT_ICCHK)
+
/* interruption response block */
typedef struct irb {
struct scsw scsw;
@@ -215,6 +335,10 @@ typedef struct irb {
int enable_mss_facility(void);
void enable_subchannel(SubChannelId schid);
+uint16_t cu_type(SubChannelId schid);
+int basic_sense(SubChannelId schid, uint16_t cutype, void *sense_data,
+ uint16_t data_size);
+int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt);
/*
* Some S390 specific IO instructions as inline
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index b39ee5d32314..11bce7d73c85 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -52,6 +52,7 @@ typedef unsigned long long __u64;
/* start.s */
void disabled_wait(void);
void consume_sclp_int(void);
+void consume_io_int(void);
/* main.c */
void panic(const char *string);
diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S
index 5c22cb0849d3..aa8fceb19da2 100644
--- a/pc-bios/s390-ccw/start.S
+++ b/pc-bios/s390-ccw/start.S
@@ -71,6 +71,26 @@ consume_sclp_int:
larl %r1, enabled_wait_psw
lpswe 0(%r1)
+/*
+ * void consume_io_int(void)
+ *
+ * eats one I/O interrupt
+ */
+ .globl consume_io_int
+consume_io_int:
+ /* enable I/O interrupts in cr6 */
+ stctg %c6,%c6,0(%r15)
+ oi 4(%r15), 0xff
+ lctlg %c6,%c6,0(%r15)
+ /* prepare i/o call handler */
+ larl %r1, io_new_code
+ stg %r1, 0x1f8
+ larl %r1, io_new_mask
+ mvc 0x1f0(8),0(%r1)
+ /* load enabled wait PSW */
+ larl %r1, enabled_wait_psw
+ lpswe 0(%r1)
+
external_new_code:
/* disable service interrupts in cr0 */
stctg %c0,%c0,0(%r15)
@@ -78,6 +98,13 @@ external_new_code:
lctlg %c0,%c0,0(%r15)
br %r14
+io_new_code:
+ /* disable I/O interrupts in cr6 */
+ stctg %c6,%c6,0(%r15)
+ ni 4(%r15), 0x00
+ lctlg %c6,%c6,0(%r15)
+ br %r14
+
.align 8
disabled_wait_psw:
.quad 0x0002000180000000,0x0000000000000000
@@ -85,3 +112,5 @@ enabled_wait_psw:
.quad 0x0302000180000000,0x0000000000000000
external_new_mask:
.quad 0x0000000180000000
+io_new_mask:
+ .quad 0x0000000180000000
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 09/19] s390-bios: cio error handling
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Add verbose error output for when unexpected i/o errors happen. This eases the
burden of debugging and reporting i/o errors. No error information is printed
in the success case, here is an example of what is output on error:
cio device error
ssid : 0x0000000000000000
cssid : 0x0000000000000000
sch_no: 0x0000000000000000
Interrupt Response Block Data:
Function Ctrl : [Start]
Activity Ctrl : [Start-Pending]
Status Ctrl : [Alert] [Primary] [Secondary] [Status-Pending]
Device Status : [Unit-Check]
Channel Status :
cpa=: 0x000000007f8d6038
prev_ccw=: 0x0000000000000000
this_ccw=: 0x0000000000000000
Eckd Dasd Sense Data (fmt 32-bytes):
Sense Condition Flags :
Residual Count =: 0x0000000000000000
Phys Drive ID =: 0x000000000000009e
low cyl address =: 0x0000000000000000
head addr & hi cyl =: 0x0000000000000000
format/message =: 0x0000000000000008
fmt-dependent[0-7] =: 0x0000000000000004
fmt-dependent[8-15]=: 0xe561282305082fff
prog action code =: 0x0000000000000016
Configuration info =: 0x00000000000040e0
mcode / hi-cyl =: 0x0000000000000000
cyl & head addr [0]=: 0x0000000000000000
cyl & head addr [1]=: 0x0000000000000000
cyl & head addr [2]=: 0x0000000000000000
The Sense Data section is currently only printed for ECKD DASD.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-10-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.c | 235 ++++++++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/libc.h | 11 ++
2 files changed, 246 insertions(+)
diff --git a/pc-bios/s390-ccw/cio.c b/pc-bios/s390-ccw/cio.c
index c43e50b00b8e..339ec5fbe7a4 100644
--- a/pc-bios/s390-ccw/cio.c
+++ b/pc-bios/s390-ccw/cio.c
@@ -85,6 +85,228 @@ static bool irb_error(Irb *irb)
return irb->scsw.dstat != (SCSW_DSTAT_DEVEND | SCSW_DSTAT_CHEND);
}
+static void print_eckd_dasd_sense_data(SenseDataEckdDasd *sd)
+{
+ char msgline[512];
+
+ if (sd->config_info & 0x8000) {
+ sclp_print("Eckd Dasd Sense Data (fmt 24-bytes):\n");
+ } else {
+ sclp_print("Eckd Dasd Sense Data (fmt 32-bytes):\n");
+ }
+
+ strcat(msgline, " Sense Condition Flags :");
+ if (sd->common_status & SNS_STAT0_CMD_REJECT) {
+ strcat(msgline, " [Cmd-Reject]");
+ }
+ if (sd->common_status & SNS_STAT0_INTERVENTION_REQ) {
+ strcat(msgline, " [Intervention-Required]");
+ }
+ if (sd->common_status & SNS_STAT0_BUS_OUT_CHECK) {
+ strcat(msgline, " [Bus-Out-Parity-Check]");
+ }
+ if (sd->common_status & SNS_STAT0_EQUIPMENT_CHECK) {
+ strcat(msgline, " [Equipment-Check]");
+ }
+ if (sd->common_status & SNS_STAT0_DATA_CHECK) {
+ strcat(msgline, " [Data-Check]");
+ }
+ if (sd->common_status & SNS_STAT0_OVERRUN) {
+ strcat(msgline, " [Overrun]");
+ }
+ if (sd->common_status & SNS_STAT0_INCOMPL_DOMAIN) {
+ strcat(msgline, " [Incomplete-Domain]");
+ }
+
+ if (sd->status[0] & SNS_STAT1_PERM_ERR) {
+ strcat(msgline, " [Permanent-Error]");
+ }
+ if (sd->status[0] & SNS_STAT1_INV_TRACK_FORMAT) {
+ strcat(msgline, " [Invalid-Track-Fmt]");
+ }
+ if (sd->status[0] & SNS_STAT1_EOC) {
+ strcat(msgline, " [End-of-Cyl]");
+ }
+ if (sd->status[0] & SNS_STAT1_MESSAGE_TO_OPER) {
+ strcat(msgline, " [Operator-Msg]");
+ }
+ if (sd->status[0] & SNS_STAT1_NO_REC_FOUND) {
+ strcat(msgline, " [No-Record-Found]");
+ }
+ if (sd->status[0] & SNS_STAT1_FILE_PROTECTED) {
+ strcat(msgline, " [File-Protected]");
+ }
+ if (sd->status[0] & SNS_STAT1_WRITE_INHIBITED) {
+ strcat(msgline, " [Write-Inhibited]");
+ }
+ if (sd->status[0] & SNS_STAT1_IMPRECISE_END) {
+ strcat(msgline, " [Imprecise-Ending]");
+ }
+
+ if (sd->status[1] & SNS_STAT2_REQ_INH_WRITE) {
+ strcat(msgline, " [Req-Inhibit-Write]");
+ }
+ if (sd->status[1] & SNS_STAT2_CORRECTABLE) {
+ strcat(msgline, " [Correctable-Data-Check]");
+ }
+ if (sd->status[1] & SNS_STAT2_FIRST_LOG_ERR) {
+ strcat(msgline, " [First-Error-Log]");
+ }
+ if (sd->status[1] & SNS_STAT2_ENV_DATA_PRESENT) {
+ strcat(msgline, " [Env-Data-Present]");
+ }
+ if (sd->status[1] & SNS_STAT2_IMPRECISE_END) {
+ strcat(msgline, " [Imprecise-End]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ print_int(" Residual Count =", sd->res_count);
+ print_int(" Phys Drive ID =", sd->phys_drive_id);
+ print_int(" low cyl address =", sd->low_cyl_addr);
+ print_int(" head addr & hi cyl =", sd->head_high_cyl_addr);
+ print_int(" format/message =", sd->fmt_msg);
+ print_int(" fmt-dependent[0-7] =", sd->fmt_dependent_info[0]);
+ print_int(" fmt-dependent[8-15]=", sd->fmt_dependent_info[1]);
+ print_int(" prog action code =", sd->program_action_code);
+ print_int(" Configuration info =", sd->config_info);
+ print_int(" mcode / hi-cyl =", sd->mcode_hicyl);
+ print_int(" cyl & head addr [0]=", sd->cyl_head_addr[0]);
+ print_int(" cyl & head addr [1]=", sd->cyl_head_addr[1]);
+ print_int(" cyl & head addr [2]=", sd->cyl_head_addr[2]);
+}
+
+static void print_irb_err(Irb *irb)
+{
+ uint64_t this_ccw = *(uint64_t *)u32toptr(irb->scsw.cpa);
+ uint64_t prev_ccw = *(uint64_t *)u32toptr(irb->scsw.cpa - 8);
+ char msgline[256];
+
+ sclp_print("Interrupt Response Block Data:\n");
+
+ strcat(msgline, " Function Ctrl :");
+ if (irb->scsw.ctrl & SCSW_FCTL_START_FUNC) {
+ strcat(msgline, " [Start]");
+ }
+ if (irb->scsw.ctrl & SCSW_FCTL_HALT_FUNC) {
+ strcat(msgline, " [Halt]");
+ }
+ if (irb->scsw.ctrl & SCSW_FCTL_CLEAR_FUNC) {
+ strcat(msgline, " [Clear]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Activity Ctrl :");
+ if (irb->scsw.ctrl & SCSW_ACTL_RESUME_PEND) {
+ strcat(msgline, " [Resume-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_START_PEND) {
+ strcat(msgline, " [Start-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_HALT_PEND) {
+ strcat(msgline, " [Halt-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_CLEAR_PEND) {
+ strcat(msgline, " [Clear-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_CH_ACTIVE) {
+ strcat(msgline, " [Channel-Active]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_DEV_ACTIVE) {
+ strcat(msgline, " [Device-Active]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_SUSPENDED) {
+ strcat(msgline, " [Suspended]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Status Ctrl :");
+ if (irb->scsw.ctrl & SCSW_SCTL_ALERT) {
+ strcat(msgline, " [Alert]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_INTERMED) {
+ strcat(msgline, " [Intermediate]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_PRIMARY) {
+ strcat(msgline, " [Primary]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_SECONDARY) {
+ strcat(msgline, " [Secondary]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_STATUS_PEND) {
+ strcat(msgline, " [Status-Pending]");
+ }
+
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Device Status :");
+ if (irb->scsw.dstat & SCSW_DSTAT_ATTN) {
+ strcat(msgline, " [Attention]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_STATMOD) {
+ strcat(msgline, " [Status-Modifier]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_CUEND) {
+ strcat(msgline, " [Ctrl-Unit-End]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_BUSY) {
+ strcat(msgline, " [Busy]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_CHEND) {
+ strcat(msgline, " [Channel-End]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_DEVEND) {
+ strcat(msgline, " [Device-End]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_UCHK) {
+ strcat(msgline, " [Unit-Check]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_UEXCP) {
+ strcat(msgline, " [Unit-Exception]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Channel Status :");
+ if (irb->scsw.cstat & SCSW_CSTAT_PCINT) {
+ strcat(msgline, " [Program-Ctrl-Interruption]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_BADLEN) {
+ strcat(msgline, " [Incorrect-Length]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_PROGCHK) {
+ strcat(msgline, " [Program-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_PROTCHK) {
+ strcat(msgline, " [Protection-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_CHDCHK) {
+ strcat(msgline, " [Channel-Data-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_CHCCHK) {
+ strcat(msgline, " [Channel-Ctrl-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_ICCHK) {
+ strcat(msgline, " [Interface-Ctrl-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_CHAINCHK) {
+ strcat(msgline, " [Chaining-Check]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ print_int(" cpa=", irb->scsw.cpa);
+ print_int(" prev_ccw=", prev_ccw);
+ print_int(" this_ccw=", this_ccw);
+}
+
/*
* Handles executing ssch, tsch and returns the irb obtained from tsch.
* Returns 0 on success, -1 if unexpected status pending and we need to retry,
@@ -180,6 +402,19 @@ int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt)
continue;
}
+ sclp_print("cio device error\n");
+ print_int(" ssid ", schid.ssid);
+ print_int(" cssid ", schid.cssid);
+ print_int(" sch_no", schid.sch_no);
+ print_int(" ctrl-unit type", cutype);
+ sclp_print("\n");
+ print_irb_err(&irb);
+ if (cutype == CU_TYPE_DASD_3990 || cutype == CU_TYPE_DASD_2107 ||
+ cutype == CU_TYPE_UNKNOWN) {
+ if (!basic_sense(schid, cutype, &sd, sizeof(sd))) {
+ print_eckd_dasd_sense_data(&sd);
+ }
+ }
rc = -1;
break;
}
diff --git a/pc-bios/s390-ccw/libc.h b/pc-bios/s390-ccw/libc.h
index 818517ff5d44..bcdc45732dd8 100644
--- a/pc-bios/s390-ccw/libc.h
+++ b/pc-bios/s390-ccw/libc.h
@@ -67,6 +67,17 @@ static inline size_t strlen(const char *str)
return i;
}
+static inline char *strcat(char *dest, const char *src)
+{
+ int i;
+ char *dest_end = dest + strlen(dest);
+
+ for (i = 0; i <= strlen(src); i++) {
+ dest_end[i] = src[i];
+ }
+ return dest;
+}
+
static inline int isdigit(int c)
{
return (c >= '0') && (c <= '9');
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 09/19] s390-bios: cio error handling
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Add verbose error output for when unexpected i/o errors happen. This eases the
burden of debugging and reporting i/o errors. No error information is printed
in the success case, here is an example of what is output on error:
cio device error
ssid : 0x0000000000000000
cssid : 0x0000000000000000
sch_no: 0x0000000000000000
Interrupt Response Block Data:
Function Ctrl : [Start]
Activity Ctrl : [Start-Pending]
Status Ctrl : [Alert] [Primary] [Secondary] [Status-Pending]
Device Status : [Unit-Check]
Channel Status :
cpa=: 0x000000007f8d6038
prev_ccw=: 0x0000000000000000
this_ccw=: 0x0000000000000000
Eckd Dasd Sense Data (fmt 32-bytes):
Sense Condition Flags :
Residual Count =: 0x0000000000000000
Phys Drive ID =: 0x000000000000009e
low cyl address =: 0x0000000000000000
head addr & hi cyl =: 0x0000000000000000
format/message =: 0x0000000000000008
fmt-dependent[0-7] =: 0x0000000000000004
fmt-dependent[8-15]=: 0xe561282305082fff
prog action code =: 0x0000000000000016
Configuration info =: 0x00000000000040e0
mcode / hi-cyl =: 0x0000000000000000
cyl & head addr [0]=: 0x0000000000000000
cyl & head addr [1]=: 0x0000000000000000
cyl & head addr [2]=: 0x0000000000000000
The Sense Data section is currently only printed for ECKD DASD.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-10-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.c | 235 ++++++++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/libc.h | 11 ++
2 files changed, 246 insertions(+)
diff --git a/pc-bios/s390-ccw/cio.c b/pc-bios/s390-ccw/cio.c
index c43e50b00b8e..339ec5fbe7a4 100644
--- a/pc-bios/s390-ccw/cio.c
+++ b/pc-bios/s390-ccw/cio.c
@@ -85,6 +85,228 @@ static bool irb_error(Irb *irb)
return irb->scsw.dstat != (SCSW_DSTAT_DEVEND | SCSW_DSTAT_CHEND);
}
+static void print_eckd_dasd_sense_data(SenseDataEckdDasd *sd)
+{
+ char msgline[512];
+
+ if (sd->config_info & 0x8000) {
+ sclp_print("Eckd Dasd Sense Data (fmt 24-bytes):\n");
+ } else {
+ sclp_print("Eckd Dasd Sense Data (fmt 32-bytes):\n");
+ }
+
+ strcat(msgline, " Sense Condition Flags :");
+ if (sd->common_status & SNS_STAT0_CMD_REJECT) {
+ strcat(msgline, " [Cmd-Reject]");
+ }
+ if (sd->common_status & SNS_STAT0_INTERVENTION_REQ) {
+ strcat(msgline, " [Intervention-Required]");
+ }
+ if (sd->common_status & SNS_STAT0_BUS_OUT_CHECK) {
+ strcat(msgline, " [Bus-Out-Parity-Check]");
+ }
+ if (sd->common_status & SNS_STAT0_EQUIPMENT_CHECK) {
+ strcat(msgline, " [Equipment-Check]");
+ }
+ if (sd->common_status & SNS_STAT0_DATA_CHECK) {
+ strcat(msgline, " [Data-Check]");
+ }
+ if (sd->common_status & SNS_STAT0_OVERRUN) {
+ strcat(msgline, " [Overrun]");
+ }
+ if (sd->common_status & SNS_STAT0_INCOMPL_DOMAIN) {
+ strcat(msgline, " [Incomplete-Domain]");
+ }
+
+ if (sd->status[0] & SNS_STAT1_PERM_ERR) {
+ strcat(msgline, " [Permanent-Error]");
+ }
+ if (sd->status[0] & SNS_STAT1_INV_TRACK_FORMAT) {
+ strcat(msgline, " [Invalid-Track-Fmt]");
+ }
+ if (sd->status[0] & SNS_STAT1_EOC) {
+ strcat(msgline, " [End-of-Cyl]");
+ }
+ if (sd->status[0] & SNS_STAT1_MESSAGE_TO_OPER) {
+ strcat(msgline, " [Operator-Msg]");
+ }
+ if (sd->status[0] & SNS_STAT1_NO_REC_FOUND) {
+ strcat(msgline, " [No-Record-Found]");
+ }
+ if (sd->status[0] & SNS_STAT1_FILE_PROTECTED) {
+ strcat(msgline, " [File-Protected]");
+ }
+ if (sd->status[0] & SNS_STAT1_WRITE_INHIBITED) {
+ strcat(msgline, " [Write-Inhibited]");
+ }
+ if (sd->status[0] & SNS_STAT1_IMPRECISE_END) {
+ strcat(msgline, " [Imprecise-Ending]");
+ }
+
+ if (sd->status[1] & SNS_STAT2_REQ_INH_WRITE) {
+ strcat(msgline, " [Req-Inhibit-Write]");
+ }
+ if (sd->status[1] & SNS_STAT2_CORRECTABLE) {
+ strcat(msgline, " [Correctable-Data-Check]");
+ }
+ if (sd->status[1] & SNS_STAT2_FIRST_LOG_ERR) {
+ strcat(msgline, " [First-Error-Log]");
+ }
+ if (sd->status[1] & SNS_STAT2_ENV_DATA_PRESENT) {
+ strcat(msgline, " [Env-Data-Present]");
+ }
+ if (sd->status[1] & SNS_STAT2_IMPRECISE_END) {
+ strcat(msgline, " [Imprecise-End]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ print_int(" Residual Count =", sd->res_count);
+ print_int(" Phys Drive ID =", sd->phys_drive_id);
+ print_int(" low cyl address =", sd->low_cyl_addr);
+ print_int(" head addr & hi cyl =", sd->head_high_cyl_addr);
+ print_int(" format/message =", sd->fmt_msg);
+ print_int(" fmt-dependent[0-7] =", sd->fmt_dependent_info[0]);
+ print_int(" fmt-dependent[8-15]=", sd->fmt_dependent_info[1]);
+ print_int(" prog action code =", sd->program_action_code);
+ print_int(" Configuration info =", sd->config_info);
+ print_int(" mcode / hi-cyl =", sd->mcode_hicyl);
+ print_int(" cyl & head addr [0]=", sd->cyl_head_addr[0]);
+ print_int(" cyl & head addr [1]=", sd->cyl_head_addr[1]);
+ print_int(" cyl & head addr [2]=", sd->cyl_head_addr[2]);
+}
+
+static void print_irb_err(Irb *irb)
+{
+ uint64_t this_ccw = *(uint64_t *)u32toptr(irb->scsw.cpa);
+ uint64_t prev_ccw = *(uint64_t *)u32toptr(irb->scsw.cpa - 8);
+ char msgline[256];
+
+ sclp_print("Interrupt Response Block Data:\n");
+
+ strcat(msgline, " Function Ctrl :");
+ if (irb->scsw.ctrl & SCSW_FCTL_START_FUNC) {
+ strcat(msgline, " [Start]");
+ }
+ if (irb->scsw.ctrl & SCSW_FCTL_HALT_FUNC) {
+ strcat(msgline, " [Halt]");
+ }
+ if (irb->scsw.ctrl & SCSW_FCTL_CLEAR_FUNC) {
+ strcat(msgline, " [Clear]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Activity Ctrl :");
+ if (irb->scsw.ctrl & SCSW_ACTL_RESUME_PEND) {
+ strcat(msgline, " [Resume-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_START_PEND) {
+ strcat(msgline, " [Start-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_HALT_PEND) {
+ strcat(msgline, " [Halt-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_CLEAR_PEND) {
+ strcat(msgline, " [Clear-Pending]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_CH_ACTIVE) {
+ strcat(msgline, " [Channel-Active]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_DEV_ACTIVE) {
+ strcat(msgline, " [Device-Active]");
+ }
+ if (irb->scsw.ctrl & SCSW_ACTL_SUSPENDED) {
+ strcat(msgline, " [Suspended]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Status Ctrl :");
+ if (irb->scsw.ctrl & SCSW_SCTL_ALERT) {
+ strcat(msgline, " [Alert]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_INTERMED) {
+ strcat(msgline, " [Intermediate]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_PRIMARY) {
+ strcat(msgline, " [Primary]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_SECONDARY) {
+ strcat(msgline, " [Secondary]");
+ }
+ if (irb->scsw.ctrl & SCSW_SCTL_STATUS_PEND) {
+ strcat(msgline, " [Status-Pending]");
+ }
+
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Device Status :");
+ if (irb->scsw.dstat & SCSW_DSTAT_ATTN) {
+ strcat(msgline, " [Attention]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_STATMOD) {
+ strcat(msgline, " [Status-Modifier]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_CUEND) {
+ strcat(msgline, " [Ctrl-Unit-End]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_BUSY) {
+ strcat(msgline, " [Busy]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_CHEND) {
+ strcat(msgline, " [Channel-End]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_DEVEND) {
+ strcat(msgline, " [Device-End]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_UCHK) {
+ strcat(msgline, " [Unit-Check]");
+ }
+ if (irb->scsw.dstat & SCSW_DSTAT_UEXCP) {
+ strcat(msgline, " [Unit-Exception]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ msgline[0] = '\0';
+ strcat(msgline, " Channel Status :");
+ if (irb->scsw.cstat & SCSW_CSTAT_PCINT) {
+ strcat(msgline, " [Program-Ctrl-Interruption]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_BADLEN) {
+ strcat(msgline, " [Incorrect-Length]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_PROGCHK) {
+ strcat(msgline, " [Program-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_PROTCHK) {
+ strcat(msgline, " [Protection-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_CHDCHK) {
+ strcat(msgline, " [Channel-Data-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_CHCCHK) {
+ strcat(msgline, " [Channel-Ctrl-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_ICCHK) {
+ strcat(msgline, " [Interface-Ctrl-Check]");
+ }
+ if (irb->scsw.cstat & SCSW_CSTAT_CHAINCHK) {
+ strcat(msgline, " [Chaining-Check]");
+ }
+ strcat(msgline, "\n");
+ sclp_print(msgline);
+
+ print_int(" cpa=", irb->scsw.cpa);
+ print_int(" prev_ccw=", prev_ccw);
+ print_int(" this_ccw=", this_ccw);
+}
+
/*
* Handles executing ssch, tsch and returns the irb obtained from tsch.
* Returns 0 on success, -1 if unexpected status pending and we need to retry,
@@ -180,6 +402,19 @@ int do_cio(SubChannelId schid, uint16_t cutype, uint32_t ccw_addr, int fmt)
continue;
}
+ sclp_print("cio device error\n");
+ print_int(" ssid ", schid.ssid);
+ print_int(" cssid ", schid.cssid);
+ print_int(" sch_no", schid.sch_no);
+ print_int(" ctrl-unit type", cutype);
+ sclp_print("\n");
+ print_irb_err(&irb);
+ if (cutype == CU_TYPE_DASD_3990 || cutype == CU_TYPE_DASD_2107 ||
+ cutype == CU_TYPE_UNKNOWN) {
+ if (!basic_sense(schid, cutype, &sd, sizeof(sd))) {
+ print_eckd_dasd_sense_data(&sd);
+ }
+ }
rc = -1;
break;
}
diff --git a/pc-bios/s390-ccw/libc.h b/pc-bios/s390-ccw/libc.h
index 818517ff5d44..bcdc45732dd8 100644
--- a/pc-bios/s390-ccw/libc.h
+++ b/pc-bios/s390-ccw/libc.h
@@ -67,6 +67,17 @@ static inline size_t strlen(const char *str)
return i;
}
+static inline char *strcat(char *dest, const char *src)
+{
+ int i;
+ char *dest_end = dest + strlen(dest);
+
+ for (i = 0; i <= strlen(src); i++) {
+ dest_end[i] = src[i];
+ }
+ return dest;
+}
+
static inline int isdigit(int c)
{
return (c >= '0') && (c <= '9');
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 10/19] s390-bios: Extend find_dev() for non-virtio devices
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
We need a method for finding the subchannel of a dasd device. Let's
modify find_dev to handle this since it mostly does what we need. Up to
this point find_dev has been specific to only virtio devices.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-11-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index e403b5f733e4..d04ea8972a0c 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -52,6 +52,12 @@ unsigned int get_loadparm_index(void)
return atoui(loadparm_str);
}
+/*
+ * Find the subchannel connected to the given device (dev_no) and fill in the
+ * subchannel information block (schib) with the connected subchannel's info.
+ * NOTE: The global variable blk_schid is updated to contain the subchannel
+ * information.
+ */
static bool find_dev(Schib *schib, int dev_no)
{
int i, r;
@@ -65,15 +71,15 @@ static bool find_dev(Schib *schib, int dev_no)
if (!schib->pmcw.dnv) {
continue;
}
- if (!virtio_is_supported(blk_schid)) {
- continue;
- }
+
/* Skip net devices since no IPLB is created and therefore no
- * no network bootloader has been loaded
+ * network bootloader has been loaded
*/
- if (virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
+ if (virtio_is_supported(blk_schid) &&
+ virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
continue;
}
+
if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
return true;
}
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 10/19] s390-bios: Extend find_dev() for non-virtio devices
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
We need a method for finding the subchannel of a dasd device. Let's
modify find_dev to handle this since it mostly does what we need. Up to
this point find_dev has been specific to only virtio devices.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-11-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index e403b5f733e4..d04ea8972a0c 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -52,6 +52,12 @@ unsigned int get_loadparm_index(void)
return atoui(loadparm_str);
}
+/*
+ * Find the subchannel connected to the given device (dev_no) and fill in the
+ * subchannel information block (schib) with the connected subchannel's info.
+ * NOTE: The global variable blk_schid is updated to contain the subchannel
+ * information.
+ */
static bool find_dev(Schib *schib, int dev_no)
{
int i, r;
@@ -65,15 +71,15 @@ static bool find_dev(Schib *schib, int dev_no)
if (!schib->pmcw.dnv) {
continue;
}
- if (!virtio_is_supported(blk_schid)) {
- continue;
- }
+
/* Skip net devices since no IPLB is created and therefore no
- * no network bootloader has been loaded
+ * network bootloader has been loaded
*/
- if (virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
+ if (virtio_is_supported(blk_schid) &&
+ virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
continue;
}
+
if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
return true;
}
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 11/19] s390-bios: Factor finding boot device out of virtio code path
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Make a new routine find_boot_device to locate the boot device for all
cases, not just virtio.
The error message for the case where no boot device has been specified
and a suitable boot device cannot be auto detected was specific to
virtio devices. We update this message to remove virtio specific wording.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-12-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 85 ++++++++++++++++++++++------------------
tests/boot-serial-test.c | 2 +-
2 files changed, 47 insertions(+), 40 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index d04ea8972a0c..d3a161c68546 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -58,17 +58,18 @@ unsigned int get_loadparm_index(void)
* NOTE: The global variable blk_schid is updated to contain the subchannel
* information.
*/
-static bool find_dev(Schib *schib, int dev_no)
+static bool find_subch(int dev_no)
{
+ Schib schib;
int i, r;
for (i = 0; i < 0x10000; i++) {
blk_schid.sch_no = i;
- r = stsch_err(blk_schid, schib);
+ r = stsch_err(blk_schid, &schib);
if ((r == 3) || (r == -EIO)) {
break;
}
- if (!schib->pmcw.dnv) {
+ if (!schib.pmcw.dnv) {
continue;
}
@@ -80,7 +81,7 @@ static bool find_dev(Schib *schib, int dev_no)
continue;
}
- if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
+ if ((dev_no < 0) || (schib.pmcw.dev == dev_no)) {
return true;
}
}
@@ -136,56 +137,61 @@ static void boot_setup(void)
have_iplb = store_iplb(&iplb);
}
-static void virtio_setup(void)
+static void find_boot_device(void)
{
- Schib schib;
- int ssid;
- bool found = false;
- uint16_t dev_no;
VDev *vdev = virtio_get_device();
- QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
-
- memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
+ int ssid;
+ bool found;
- if (have_iplb) {
- switch (iplb.pbt) {
- case S390_IPL_TYPE_CCW:
- dev_no = iplb.ccw.devno;
- debug_print_int("device no. ", dev_no);
- blk_schid.ssid = iplb.ccw.ssid & 0x3;
- debug_print_int("ssid ", blk_schid.ssid);
- found = find_dev(&schib, dev_no);
- break;
- case S390_IPL_TYPE_QEMU_SCSI:
- vdev->scsi_device_selected = true;
- vdev->selected_scsi_device.channel = iplb.scsi.channel;
- vdev->selected_scsi_device.target = iplb.scsi.target;
- vdev->selected_scsi_device.lun = iplb.scsi.lun;
- blk_schid.ssid = iplb.scsi.ssid & 0x3;
- found = find_dev(&schib, iplb.scsi.devno);
- break;
- default:
- panic("List-directed IPL not supported yet!\n");
- }
- menu_setup();
- } else {
+ if (!have_iplb) {
for (ssid = 0; ssid < 0x3; ssid++) {
blk_schid.ssid = ssid;
- found = find_dev(&schib, -1);
+ found = find_subch(-1);
if (found) {
- break;
+ return;
}
}
+ panic("Could not find a suitable boot device (none specified)\n");
+ }
+
+ switch (iplb.pbt) {
+ case S390_IPL_TYPE_CCW:
+ debug_print_int("device no. ", iplb.ccw.devno);
+ blk_schid.ssid = iplb.ccw.ssid & 0x3;
+ debug_print_int("ssid ", blk_schid.ssid);
+ found = find_subch(iplb.ccw.devno);
+ break;
+ case S390_IPL_TYPE_QEMU_SCSI:
+ vdev->scsi_device_selected = true;
+ vdev->selected_scsi_device.channel = iplb.scsi.channel;
+ vdev->selected_scsi_device.target = iplb.scsi.target;
+ vdev->selected_scsi_device.lun = iplb.scsi.lun;
+ blk_schid.ssid = iplb.scsi.ssid & 0x3;
+ found = find_subch(iplb.scsi.devno);
+ break;
+ default:
+ panic("List-directed IPL not supported yet!\n");
}
- IPL_assert(found, "No virtio device found");
+ IPL_assert(found, "Boot device not found\n");
+}
+
+static void virtio_setup(void)
+{
+ VDev *vdev = virtio_get_device();
+ QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
+
+ memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
+
+ if (have_iplb) {
+ menu_setup();
+ }
if (virtio_get_device_type() == VIRTIO_ID_NET) {
sclp_print("Network boot device detected\n");
vdev->netboot_start_addr = qipl.netboot_start_addr;
} else {
virtio_blk_setup_device(blk_schid);
-
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
}
@@ -195,8 +201,9 @@ int main(void)
sclp_setup();
css_setup();
boot_setup();
- virtio_setup();
+ find_boot_device();
+ virtio_setup();
zipl_load(); /* no return */
panic("Failed to load OS from hard disk\n");
diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c
index c591748aaf00..24852d4c7d0b 100644
--- a/tests/boot-serial-test.c
+++ b/tests/boot-serial-test.c
@@ -114,7 +114,7 @@ static testdef_t tests[] = {
{ "sparc", "SS-4", "", "MB86904" },
{ "sparc", "SS-600MP", "", "TMS390Z55" },
{ "sparc64", "sun4u", "", "UltraSPARC" },
- { "s390x", "s390-ccw-virtio", "", "virtio device" },
+ { "s390x", "s390-ccw-virtio", "", "device" },
{ "m68k", "mcf5208evb", "", "TT", sizeof(kernel_mcf5208), kernel_mcf5208 },
{ "microblaze", "petalogix-s3adsp1800", "", "TT",
sizeof(kernel_pls3adsp1800), kernel_pls3adsp1800 },
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 11/19] s390-bios: Factor finding boot device out of virtio code path
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Make a new routine find_boot_device to locate the boot device for all
cases, not just virtio.
The error message for the case where no boot device has been specified
and a suitable boot device cannot be auto detected was specific to
virtio devices. We update this message to remove virtio specific wording.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-12-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 85 ++++++++++++++++++++++------------------
tests/boot-serial-test.c | 2 +-
2 files changed, 47 insertions(+), 40 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index d04ea8972a0c..d3a161c68546 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -58,17 +58,18 @@ unsigned int get_loadparm_index(void)
* NOTE: The global variable blk_schid is updated to contain the subchannel
* information.
*/
-static bool find_dev(Schib *schib, int dev_no)
+static bool find_subch(int dev_no)
{
+ Schib schib;
int i, r;
for (i = 0; i < 0x10000; i++) {
blk_schid.sch_no = i;
- r = stsch_err(blk_schid, schib);
+ r = stsch_err(blk_schid, &schib);
if ((r == 3) || (r == -EIO)) {
break;
}
- if (!schib->pmcw.dnv) {
+ if (!schib.pmcw.dnv) {
continue;
}
@@ -80,7 +81,7 @@ static bool find_dev(Schib *schib, int dev_no)
continue;
}
- if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
+ if ((dev_no < 0) || (schib.pmcw.dev == dev_no)) {
return true;
}
}
@@ -136,56 +137,61 @@ static void boot_setup(void)
have_iplb = store_iplb(&iplb);
}
-static void virtio_setup(void)
+static void find_boot_device(void)
{
- Schib schib;
- int ssid;
- bool found = false;
- uint16_t dev_no;
VDev *vdev = virtio_get_device();
- QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
-
- memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
+ int ssid;
+ bool found;
- if (have_iplb) {
- switch (iplb.pbt) {
- case S390_IPL_TYPE_CCW:
- dev_no = iplb.ccw.devno;
- debug_print_int("device no. ", dev_no);
- blk_schid.ssid = iplb.ccw.ssid & 0x3;
- debug_print_int("ssid ", blk_schid.ssid);
- found = find_dev(&schib, dev_no);
- break;
- case S390_IPL_TYPE_QEMU_SCSI:
- vdev->scsi_device_selected = true;
- vdev->selected_scsi_device.channel = iplb.scsi.channel;
- vdev->selected_scsi_device.target = iplb.scsi.target;
- vdev->selected_scsi_device.lun = iplb.scsi.lun;
- blk_schid.ssid = iplb.scsi.ssid & 0x3;
- found = find_dev(&schib, iplb.scsi.devno);
- break;
- default:
- panic("List-directed IPL not supported yet!\n");
- }
- menu_setup();
- } else {
+ if (!have_iplb) {
for (ssid = 0; ssid < 0x3; ssid++) {
blk_schid.ssid = ssid;
- found = find_dev(&schib, -1);
+ found = find_subch(-1);
if (found) {
- break;
+ return;
}
}
+ panic("Could not find a suitable boot device (none specified)\n");
+ }
+
+ switch (iplb.pbt) {
+ case S390_IPL_TYPE_CCW:
+ debug_print_int("device no. ", iplb.ccw.devno);
+ blk_schid.ssid = iplb.ccw.ssid & 0x3;
+ debug_print_int("ssid ", blk_schid.ssid);
+ found = find_subch(iplb.ccw.devno);
+ break;
+ case S390_IPL_TYPE_QEMU_SCSI:
+ vdev->scsi_device_selected = true;
+ vdev->selected_scsi_device.channel = iplb.scsi.channel;
+ vdev->selected_scsi_device.target = iplb.scsi.target;
+ vdev->selected_scsi_device.lun = iplb.scsi.lun;
+ blk_schid.ssid = iplb.scsi.ssid & 0x3;
+ found = find_subch(iplb.scsi.devno);
+ break;
+ default:
+ panic("List-directed IPL not supported yet!\n");
}
- IPL_assert(found, "No virtio device found");
+ IPL_assert(found, "Boot device not found\n");
+}
+
+static void virtio_setup(void)
+{
+ VDev *vdev = virtio_get_device();
+ QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
+
+ memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
+
+ if (have_iplb) {
+ menu_setup();
+ }
if (virtio_get_device_type() == VIRTIO_ID_NET) {
sclp_print("Network boot device detected\n");
vdev->netboot_start_addr = qipl.netboot_start_addr;
} else {
virtio_blk_setup_device(blk_schid);
-
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
}
@@ -195,8 +201,9 @@ int main(void)
sclp_setup();
css_setup();
boot_setup();
- virtio_setup();
+ find_boot_device();
+ virtio_setup();
zipl_load(); /* no return */
panic("Failed to load OS from hard disk\n");
diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c
index c591748aaf00..24852d4c7d0b 100644
--- a/tests/boot-serial-test.c
+++ b/tests/boot-serial-test.c
@@ -114,7 +114,7 @@ static testdef_t tests[] = {
{ "sparc", "SS-4", "", "MB86904" },
{ "sparc", "SS-600MP", "", "TMS390Z55" },
{ "sparc64", "sun4u", "", "UltraSPARC" },
- { "s390x", "s390-ccw-virtio", "", "virtio device" },
+ { "s390x", "s390-ccw-virtio", "", "device" },
{ "m68k", "mcf5208evb", "", "TT", sizeof(kernel_mcf5208), kernel_mcf5208 },
{ "microblaze", "petalogix-s3adsp1800", "", "TT",
sizeof(kernel_pls3adsp1800), kernel_pls3adsp1800 },
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 12/19] s390-bios: Refactor virtio to run channel programs via cio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Now that we have a Channel I/O library let's modify virtio boot code to
make use of it for running channel programs.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-13-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio.c | 57 +++++++++++++++++++--------------------
1 file changed, 27 insertions(+), 30 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index aa9da7253fb2..35278eaee13d 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -14,6 +14,7 @@
#include "virtio.h"
#include "virtio-scsi.h"
#include "bswap.h"
+#include "helper.h"
#define VRING_WAIT_REPLY_TIMEOUT 30
@@ -89,33 +90,20 @@ int drain_irqs(SubChannelId schid)
}
}
-static int run_ccw(VDev *vdev, int cmd, void *ptr, int len)
+static int run_ccw(VDev *vdev, int cmd, void *ptr, int len, bool sli)
{
Ccw1 ccw = {};
- CmdOrb orb = {};
- int r;
-
- enable_subchannel(vdev->schid);
-
- /* start subchannel command */
- orb.fmt = 1;
- orb.cpa = (u32)(long)&ccw;
- orb.lpm = 0x80;
ccw.cmd_code = cmd;
ccw.cda = (long)ptr;
ccw.count = len;
- r = ssch(vdev->schid, &orb);
- /*
- * XXX Wait until device is done processing the CCW. For now we can
- * assume that a simple tsch will have finished the CCW processing,
- * but the architecture allows for asynchronous operation
- */
- if (!r) {
- r = drain_irqs(vdev->schid);
+ if (sli) {
+ ccw.flags |= CCW_FLAG_SLI;
}
- return r;
+
+ enable_subchannel(vdev->schid);
+ return do_cio(vdev->schid, vdev->senseid.cu_type, ptr2u32(&ccw), CCW_FMT1);
}
static void vring_init(VRing *vr, VqInfo *info)
@@ -257,7 +245,7 @@ void virtio_setup_ccw(VDev *vdev)
vdev->config.blk.blk_size = 0; /* mark "illegal" - setup started... */
vdev->guessed_disk_nature = VIRTIO_GDN_NONE;
- run_ccw(vdev, CCW_CMD_VDEV_RESET, NULL, 0);
+ run_ccw(vdev, CCW_CMD_VDEV_RESET, NULL, 0, false);
switch (vdev->senseid.cu_model) {
case VIRTIO_ID_NET:
@@ -278,18 +266,19 @@ void virtio_setup_ccw(VDev *vdev)
default:
panic("Unsupported virtio device\n");
}
- IPL_assert(run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size) == 0,
- "Could not get block device configuration");
+ IPL_assert(
+ run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size, false) == 0,
+ "Could not get block device configuration");
/* Feature negotiation */
for (i = 0; i < ARRAY_SIZE(vdev->guest_features); i++) {
feats.features = 0;
feats.index = i;
- rc = run_ccw(vdev, CCW_CMD_READ_FEAT, &feats, sizeof(feats));
+ rc = run_ccw(vdev, CCW_CMD_READ_FEAT, &feats, sizeof(feats), false);
IPL_assert(rc == 0, "Could not get features bits");
vdev->guest_features[i] &= bswap32(feats.features);
feats.features = bswap32(vdev->guest_features[i]);
- rc = run_ccw(vdev, CCW_CMD_WRITE_FEAT, &feats, sizeof(feats));
+ rc = run_ccw(vdev, CCW_CMD_WRITE_FEAT, &feats, sizeof(feats), false);
IPL_assert(rc == 0, "Could not set features bits");
}
@@ -306,16 +295,17 @@ void virtio_setup_ccw(VDev *vdev)
};
IPL_assert(
- run_ccw(vdev, CCW_CMD_READ_VQ_CONF, &config, sizeof(config)) == 0,
+ run_ccw(vdev, CCW_CMD_READ_VQ_CONF, &config, sizeof(config), false) == 0,
"Could not get block device VQ configuration");
info.num = config.num;
vring_init(&vdev->vrings[i], &info);
vdev->vrings[i].schid = vdev->schid;
- IPL_assert(run_ccw(vdev, CCW_CMD_SET_VQ, &info, sizeof(info)) == 0,
- "Cannot set VQ info");
+ IPL_assert(
+ run_ccw(vdev, CCW_CMD_SET_VQ, &info, sizeof(info), false) == 0,
+ "Cannot set VQ info");
}
IPL_assert(
- run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status)) == 0,
+ run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false) == 0,
"Could not write status to host");
}
@@ -323,8 +313,15 @@ bool virtio_is_supported(SubChannelId schid)
{
vdev.schid = schid;
memset(&vdev.senseid, 0, sizeof(vdev.senseid));
- /* run sense id command */
- if (run_ccw(&vdev, CCW_CMD_SENSE_ID, &vdev.senseid, sizeof(vdev.senseid))) {
+
+ /*
+ * Run sense id command.
+ * The size of the senseid data differs between devices (notably,
+ * between virtio devices and dasds), so specify the largest possible
+ * size and suppress the incorrect length indication for smaller sizes.
+ */
+ if (run_ccw(&vdev, CCW_CMD_SENSE_ID, &vdev.senseid, sizeof(vdev.senseid),
+ true)) {
return false;
}
if (vdev.senseid.cu_type == 0x3832) {
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 12/19] s390-bios: Refactor virtio to run channel programs via cio
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Now that we have a Channel I/O library let's modify virtio boot code to
make use of it for running channel programs.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-13-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio.c | 57 +++++++++++++++++++--------------------
1 file changed, 27 insertions(+), 30 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index aa9da7253fb2..35278eaee13d 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -14,6 +14,7 @@
#include "virtio.h"
#include "virtio-scsi.h"
#include "bswap.h"
+#include "helper.h"
#define VRING_WAIT_REPLY_TIMEOUT 30
@@ -89,33 +90,20 @@ int drain_irqs(SubChannelId schid)
}
}
-static int run_ccw(VDev *vdev, int cmd, void *ptr, int len)
+static int run_ccw(VDev *vdev, int cmd, void *ptr, int len, bool sli)
{
Ccw1 ccw = {};
- CmdOrb orb = {};
- int r;
-
- enable_subchannel(vdev->schid);
-
- /* start subchannel command */
- orb.fmt = 1;
- orb.cpa = (u32)(long)&ccw;
- orb.lpm = 0x80;
ccw.cmd_code = cmd;
ccw.cda = (long)ptr;
ccw.count = len;
- r = ssch(vdev->schid, &orb);
- /*
- * XXX Wait until device is done processing the CCW. For now we can
- * assume that a simple tsch will have finished the CCW processing,
- * but the architecture allows for asynchronous operation
- */
- if (!r) {
- r = drain_irqs(vdev->schid);
+ if (sli) {
+ ccw.flags |= CCW_FLAG_SLI;
}
- return r;
+
+ enable_subchannel(vdev->schid);
+ return do_cio(vdev->schid, vdev->senseid.cu_type, ptr2u32(&ccw), CCW_FMT1);
}
static void vring_init(VRing *vr, VqInfo *info)
@@ -257,7 +245,7 @@ void virtio_setup_ccw(VDev *vdev)
vdev->config.blk.blk_size = 0; /* mark "illegal" - setup started... */
vdev->guessed_disk_nature = VIRTIO_GDN_NONE;
- run_ccw(vdev, CCW_CMD_VDEV_RESET, NULL, 0);
+ run_ccw(vdev, CCW_CMD_VDEV_RESET, NULL, 0, false);
switch (vdev->senseid.cu_model) {
case VIRTIO_ID_NET:
@@ -278,18 +266,19 @@ void virtio_setup_ccw(VDev *vdev)
default:
panic("Unsupported virtio device\n");
}
- IPL_assert(run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size) == 0,
- "Could not get block device configuration");
+ IPL_assert(
+ run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size, false) == 0,
+ "Could not get block device configuration");
/* Feature negotiation */
for (i = 0; i < ARRAY_SIZE(vdev->guest_features); i++) {
feats.features = 0;
feats.index = i;
- rc = run_ccw(vdev, CCW_CMD_READ_FEAT, &feats, sizeof(feats));
+ rc = run_ccw(vdev, CCW_CMD_READ_FEAT, &feats, sizeof(feats), false);
IPL_assert(rc == 0, "Could not get features bits");
vdev->guest_features[i] &= bswap32(feats.features);
feats.features = bswap32(vdev->guest_features[i]);
- rc = run_ccw(vdev, CCW_CMD_WRITE_FEAT, &feats, sizeof(feats));
+ rc = run_ccw(vdev, CCW_CMD_WRITE_FEAT, &feats, sizeof(feats), false);
IPL_assert(rc == 0, "Could not set features bits");
}
@@ -306,16 +295,17 @@ void virtio_setup_ccw(VDev *vdev)
};
IPL_assert(
- run_ccw(vdev, CCW_CMD_READ_VQ_CONF, &config, sizeof(config)) == 0,
+ run_ccw(vdev, CCW_CMD_READ_VQ_CONF, &config, sizeof(config), false) == 0,
"Could not get block device VQ configuration");
info.num = config.num;
vring_init(&vdev->vrings[i], &info);
vdev->vrings[i].schid = vdev->schid;
- IPL_assert(run_ccw(vdev, CCW_CMD_SET_VQ, &info, sizeof(info)) == 0,
- "Cannot set VQ info");
+ IPL_assert(
+ run_ccw(vdev, CCW_CMD_SET_VQ, &info, sizeof(info), false) == 0,
+ "Cannot set VQ info");
}
IPL_assert(
- run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status)) == 0,
+ run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false) == 0,
"Could not write status to host");
}
@@ -323,8 +313,15 @@ bool virtio_is_supported(SubChannelId schid)
{
vdev.schid = schid;
memset(&vdev.senseid, 0, sizeof(vdev.senseid));
- /* run sense id command */
- if (run_ccw(&vdev, CCW_CMD_SENSE_ID, &vdev.senseid, sizeof(vdev.senseid))) {
+
+ /*
+ * Run sense id command.
+ * The size of the senseid data differs between devices (notably,
+ * between virtio devices and dasds), so specify the largest possible
+ * size and suppress the incorrect length indication for smaller sizes.
+ */
+ if (run_ccw(&vdev, CCW_CMD_SENSE_ID, &vdev.senseid, sizeof(vdev.senseid),
+ true)) {
return false;
}
if (vdev.senseid.cu_type == 0x3832) {
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 13/19] s390-bios: Use control unit type to determine boot method
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
The boot method is different depending on which device type we are
booting from. Let's examine the control unit type to determine if we're
a virtio device. We'll eventually add a case to check for a real dasd device
here as well.
Since we have to call enable_subchannel() in main now, might as well
remove that call from virtio.c : run_ccw(). This requires adding some
additional enable_subchannel calls to not break calls to
virtio_is_supported().
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-14-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 16 ++++++++++++++--
pc-bios/s390-ccw/netmain.c | 1 +
pc-bios/s390-ccw/virtio.c | 1 -
3 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index d3a161c68546..57a10138c65d 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -76,6 +76,7 @@ static bool find_subch(int dev_no)
/* Skip net devices since no IPLB is created and therefore no
* network bootloader has been loaded
*/
+ enable_subchannel(blk_schid);
if (virtio_is_supported(blk_schid) &&
virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
continue;
@@ -198,13 +199,24 @@ static void virtio_setup(void)
int main(void)
{
+ uint16_t cutype;
+
sclp_setup();
css_setup();
boot_setup();
find_boot_device();
+ enable_subchannel(blk_schid);
- virtio_setup();
- zipl_load(); /* no return */
+ cutype = cu_type(blk_schid);
+ switch (cutype) {
+ case CU_TYPE_VIRTIO:
+ virtio_setup();
+ zipl_load(); /* no return */
+ break;
+ default:
+ print_int("Attempting to boot from unexpected device type", cutype);
+ panic("");
+ }
panic("Failed to load OS from hard disk\n");
return 0; /* make compiler happy */
diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index 5189c0fc39e5..f3542cb2cf11 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -476,6 +476,7 @@ static bool find_net_dev(Schib *schib, int dev_no)
if (!schib->pmcw.dnv) {
continue;
}
+ enable_subchannel(net_schid);
if (!virtio_is_supported(net_schid)) {
continue;
}
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index 35278eaee13d..fb40ca982853 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -102,7 +102,6 @@ static int run_ccw(VDev *vdev, int cmd, void *ptr, int len, bool sli)
ccw.flags |= CCW_FLAG_SLI;
}
- enable_subchannel(vdev->schid);
return do_cio(vdev->schid, vdev->senseid.cu_type, ptr2u32(&ccw), CCW_FMT1);
}
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 13/19] s390-bios: Use control unit type to determine boot method
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
The boot method is different depending on which device type we are
booting from. Let's examine the control unit type to determine if we're
a virtio device. We'll eventually add a case to check for a real dasd device
here as well.
Since we have to call enable_subchannel() in main now, might as well
remove that call from virtio.c : run_ccw(). This requires adding some
additional enable_subchannel calls to not break calls to
virtio_is_supported().
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-14-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 16 ++++++++++++++--
pc-bios/s390-ccw/netmain.c | 1 +
pc-bios/s390-ccw/virtio.c | 1 -
3 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index d3a161c68546..57a10138c65d 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -76,6 +76,7 @@ static bool find_subch(int dev_no)
/* Skip net devices since no IPLB is created and therefore no
* network bootloader has been loaded
*/
+ enable_subchannel(blk_schid);
if (virtio_is_supported(blk_schid) &&
virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
continue;
@@ -198,13 +199,24 @@ static void virtio_setup(void)
int main(void)
{
+ uint16_t cutype;
+
sclp_setup();
css_setup();
boot_setup();
find_boot_device();
+ enable_subchannel(blk_schid);
- virtio_setup();
- zipl_load(); /* no return */
+ cutype = cu_type(blk_schid);
+ switch (cutype) {
+ case CU_TYPE_VIRTIO:
+ virtio_setup();
+ zipl_load(); /* no return */
+ break;
+ default:
+ print_int("Attempting to boot from unexpected device type", cutype);
+ panic("");
+ }
panic("Failed to load OS from hard disk\n");
return 0; /* make compiler happy */
diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index 5189c0fc39e5..f3542cb2cf11 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -476,6 +476,7 @@ static bool find_net_dev(Schib *schib, int dev_no)
if (!schib->pmcw.dnv) {
continue;
}
+ enable_subchannel(net_schid);
if (!virtio_is_supported(net_schid)) {
continue;
}
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index 35278eaee13d..fb40ca982853 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -102,7 +102,6 @@ static int run_ccw(VDev *vdev, int cmd, void *ptr, int len, bool sli)
ccw.flags |= CCW_FLAG_SLI;
}
- enable_subchannel(vdev->schid);
return do_cio(vdev->schid, vdev->senseid.cu_type, ptr2u32(&ccw), CCW_FMT1);
}
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 14/19] s390-bios: Add channel command codes/structs needed for dasd-ipl
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
The dasd IPL procedure needs to execute a few previously unused
channel commands. Let's define them and their associated data
structures.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-15-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index 1637e32070f3..aaa432deddb9 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -200,11 +200,14 @@ typedef struct ccw1 {
#define CCW_FLAG_IDA 0x04
#define CCW_FLAG_SUSPEND 0x02
+/* Common CCW commands */
+#define CCW_CMD_READ_IPL 0x02
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_BASIC_SENSE 0x04
#define CCW_CMD_TIC 0x08
#define CCW_CMD_SENSE_ID 0xe4
+/* Virtio CCW commands */
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
#define CCW_CMD_READ_FEAT 0x12
@@ -216,6 +219,12 @@ typedef struct ccw1 {
#define CCW_CMD_SET_CONF_IND 0x53
#define CCW_CMD_READ_VQ_CONF 0x32
+/* DASD CCW commands */
+#define CCW_CMD_DASD_READ 0x06
+#define CCW_CMD_DASD_SEEK 0x07
+#define CCW_CMD_DASD_SEARCH_ID_EQ 0x31
+#define CCW_CMD_DASD_READ_MT 0x86
+
/*
* Command-mode operation request block
*/
@@ -333,6 +342,20 @@ typedef struct irb {
__u32 emw[8];
} __attribute__ ((packed, aligned(4))) Irb;
+/* Used for SEEK ccw commands */
+typedef struct CcwSeekData {
+ uint16_t reserved;
+ uint16_t cyl;
+ uint16_t head;
+} __attribute__((packed)) CcwSeekData;
+
+/* Used for SEARCH ID ccw commands */
+typedef struct CcwSearchIdData {
+ uint16_t cyl;
+ uint16_t head;
+ uint8_t record;
+} __attribute__((packed)) CcwSearchIdData;
+
int enable_mss_facility(void);
void enable_subchannel(SubChannelId schid);
uint16_t cu_type(SubChannelId schid);
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 14/19] s390-bios: Add channel command codes/structs needed for dasd-ipl
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
The dasd IPL procedure needs to execute a few previously unused
channel commands. Let's define them and their associated data
structures.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-15-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/cio.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
index 1637e32070f3..aaa432deddb9 100644
--- a/pc-bios/s390-ccw/cio.h
+++ b/pc-bios/s390-ccw/cio.h
@@ -200,11 +200,14 @@ typedef struct ccw1 {
#define CCW_FLAG_IDA 0x04
#define CCW_FLAG_SUSPEND 0x02
+/* Common CCW commands */
+#define CCW_CMD_READ_IPL 0x02
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_BASIC_SENSE 0x04
#define CCW_CMD_TIC 0x08
#define CCW_CMD_SENSE_ID 0xe4
+/* Virtio CCW commands */
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
#define CCW_CMD_READ_FEAT 0x12
@@ -216,6 +219,12 @@ typedef struct ccw1 {
#define CCW_CMD_SET_CONF_IND 0x53
#define CCW_CMD_READ_VQ_CONF 0x32
+/* DASD CCW commands */
+#define CCW_CMD_DASD_READ 0x06
+#define CCW_CMD_DASD_SEEK 0x07
+#define CCW_CMD_DASD_SEARCH_ID_EQ 0x31
+#define CCW_CMD_DASD_READ_MT 0x86
+
/*
* Command-mode operation request block
*/
@@ -333,6 +342,20 @@ typedef struct irb {
__u32 emw[8];
} __attribute__ ((packed, aligned(4))) Irb;
+/* Used for SEEK ccw commands */
+typedef struct CcwSeekData {
+ uint16_t reserved;
+ uint16_t cyl;
+ uint16_t head;
+} __attribute__((packed)) CcwSeekData;
+
+/* Used for SEARCH ID ccw commands */
+typedef struct CcwSearchIdData {
+ uint16_t cyl;
+ uint16_t head;
+ uint8_t record;
+} __attribute__((packed)) CcwSearchIdData;
+
int enable_mss_facility(void);
void enable_subchannel(SubChannelId schid);
uint16_t cu_type(SubChannelId schid);
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 15/19] s390-bios: Support booting from real dasd device
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Allows guest to boot from a vfio configured real dasd device.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-16-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
MAINTAINERS | 1 +
docs/devel/s390-dasd-ipl.txt | 133 ++++++++++++++++++++
pc-bios/s390-ccw/Makefile | 2 +-
pc-bios/s390-ccw/dasd-ipl.c | 235 +++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/dasd-ipl.h | 16 +++
pc-bios/s390-ccw/main.c | 5 +
pc-bios/s390-ccw/s390-arch.h | 13 ++
7 files changed, 404 insertions(+), 1 deletion(-)
create mode 100644 docs/devel/s390-dasd-ipl.txt
create mode 100644 pc-bios/s390-ccw/dasd-ipl.c
create mode 100644 pc-bios/s390-ccw/dasd-ipl.h
diff --git a/MAINTAINERS b/MAINTAINERS
index f7976aa43d0a..be53b7d3b703 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1181,6 +1181,7 @@ S: Supported
F: hw/s390x/ipl.*
F: pc-bios/s390-ccw/
F: pc-bios/s390-ccw.img
+F: docs/devel/s390-dasd-ipl.txt
T: git https://github.com/borntraeger/qemu.git s390-next
L: qemu-s390x@nongnu.org
diff --git a/docs/devel/s390-dasd-ipl.txt b/docs/devel/s390-dasd-ipl.txt
new file mode 100644
index 000000000000..9107e048e4e6
--- /dev/null
+++ b/docs/devel/s390-dasd-ipl.txt
@@ -0,0 +1,133 @@
+*****************************
+***** s390 hardware IPL *****
+*****************************
+
+The s390 hardware IPL process consists of the following steps.
+
+1. A READ IPL ccw is constructed in memory location 0x0.
+ This ccw, by definition, reads the IPL1 record which is located on the disk
+ at cylinder 0 track 0 record 1. Note that the chain flag is on in this ccw
+ so when it is complete another ccw will be fetched and executed from memory
+ location 0x08.
+
+2. Execute the Read IPL ccw at 0x00, thereby reading IPL1 data into 0x00.
+ IPL1 data is 24 bytes in length and consists of the following pieces of
+ information: [psw][read ccw][tic ccw]. When the machine executes the Read
+ IPL ccw it read the 24-bytes of IPL1 to be read into memory starting at
+ location 0x0. Then the ccw program at 0x08 which consists of a read
+ ccw and a tic ccw is automatically executed because of the chain flag from
+ the original READ IPL ccw. The read ccw will read the IPL2 data into memory
+ and the TIC (Transfer In Channel) will transfer control to the channel
+ program contained in the IPL2 data. The TIC channel command is the
+ equivalent of a branch/jump/goto instruction for channel programs.
+ NOTE: The ccws in IPL1 are defined by the architecture to be format 0.
+
+3. Execute IPL2.
+ The TIC ccw instruction at the end of the IPL1 channel program will begin
+ the execution of the IPL2 channel program. IPL2 is stage-2 of the boot
+ process and will contain a larger channel program than IPL1. The point of
+ IPL2 is to find and load either the operating system or a small program that
+ loads the operating system from disk. At the end of this step all or some of
+ the real operating system is loaded into memory and we are ready to hand
+ control over to the guest operating system. At this point the guest
+ operating system is entirely responsible for loading any more data it might
+ need to function. NOTE: The IPL2 channel program might read data into memory
+ location 0 thereby overwriting the IPL1 psw and channel program. This is ok
+ as long as the data placed in location 0 contains a psw whose instruction
+ address points to the guest operating system code to execute at the end of
+ the IPL/boot process.
+ NOTE: The ccws in IPL2 are defined by the architecture to be format 0.
+
+4. Start executing the guest operating system.
+ The psw that was loaded into memory location 0 as part of the ipl process
+ should contain the needed flags for the operating system we have loaded. The
+ psw's instruction address will point to the location in memory where we want
+ to start executing the operating system. This psw is loaded (via LPSW
+ instruction) causing control to be passed to the operating system code.
+
+In a non-virtualized environment this process, handled entirely by the hardware,
+is kicked off by the user initiating a "Load" procedure from the hardware
+management console. This "Load" procedure crafts a special "Read IPL" ccw in
+memory location 0x0 that reads IPL1. It then executes this ccw thereby kicking
+off the reading of IPL1 data. Since the channel program from IPL1 will be
+written immediately after the special "Read IPL" ccw, the IPL1 channel program
+will be executed immediately (the special read ccw has the chaining bit turned
+on). The TIC at the end of the IPL1 channel program will cause the IPL2 channel
+program to be executed automatically. After this sequence completes the "Load"
+procedure then loads the psw from 0x0.
+
+**********************************************************
+***** How this all pertains to QEMU (and the kernel) *****
+**********************************************************
+
+In theory we should merely have to do the following to IPL/boot a guest
+operating system from a DASD device:
+
+1. Place a "Read IPL" ccw into memory location 0x0 with chaining bit on.
+2. Execute channel program at 0x0.
+3. LPSW 0x0.
+
+However, our emulation of the machine's channel program logic within the kernel
+is missing one key feature that is required for this process to work:
+non-prefetch of ccw data.
+
+When we start a channel program we pass the channel subsystem parameters via an
+ORB (Operation Request Block). One of those parameters is a prefetch bit. If the
+bit is on then the vfio-ccw kernel driver is allowed to read the entire channel
+program from guest memory before it starts executing it. This means that any
+channel commands that read additional channel commands will not work as expected
+because the newly read commands will only exist in guest memory and NOT within
+the kernel's channel subsystem memory. The kernel vfio-ccw driver currently
+requires this bit to be on for all channel programs. This is a problem because
+the IPL process consists of transferring control from the "Read IPL" ccw
+immediately to the IPL1 channel program that was read by "Read IPL".
+
+Not being able to turn off prefetch will also prevent the TIC at the end of the
+IPL1 channel program from transferring control to the IPL2 channel program.
+
+Lastly, in some cases (the zipl bootloader for example) the IPL2 program also
+transfers control to another channel program segment immediately after reading
+it from the disk. So we need to be able to handle this case.
+
+**************************
+***** What QEMU does *****
+**************************
+
+Since we are forced to live with prefetch we cannot use the very simple IPL
+procedure we defined in the preceding section. So we compensate by doing the
+following.
+
+1. Place "Read IPL" ccw into memory location 0x0, but turn off chaining bit.
+2. Execute "Read IPL" at 0x0.
+
+ So now IPL1's psw is at 0x0 and IPL1's channel program is at 0x08.
+
+4. Write a custom channel program that will seek to the IPL2 record and then
+ execute the READ and TIC ccws from IPL1. Normally the seek is not required
+ because after reading the IPL1 record the disk is automatically positioned
+ to read the very next record which will be IPL2. But since we are not reading
+ both IPL1 and IPL2 as part of the same channel program we must manually set
+ the position.
+
+5. Grab the target address of the TIC instruction from the IPL1 channel program.
+ This address is where the IPL2 channel program starts.
+
+ Now IPL2 is loaded into memory somewhere, and we know the address.
+
+6. Execute the IPL2 channel program at the address obtained in step #5.
+
+ Because this channel program can be dynamic, we must use a special algorithm
+ that detects a READ immediately followed by a TIC and breaks the ccw chain
+ by turning off the chain bit in the READ ccw. When control is returned from
+ the kernel/hardware to the QEMU bios code we immediately issue another start
+ subchannel to execute the remaining TIC instruction. This causes the entire
+ channel program (starting from the TIC) and all needed data to be refetched
+ thereby stepping around the limitation that would otherwise prevent this
+ channel program from executing properly.
+
+ Now the operating system code is loaded somewhere in guest memory and the psw
+ in memory location 0x0 will point to entry code for the guest operating
+ system.
+
+7. LPSW 0x0.
+ LPSW transfers control to the guest operating system and we're done.
diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile
index 12ad9c1d5813..a048b6b077a9 100644
--- a/pc-bios/s390-ccw/Makefile
+++ b/pc-bios/s390-ccw/Makefile
@@ -10,7 +10,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
.PHONY : all clean build-all
OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \
- virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o
+ virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o dasd-ipl.o
QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS))
QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float
diff --git a/pc-bios/s390-ccw/dasd-ipl.c b/pc-bios/s390-ccw/dasd-ipl.c
new file mode 100644
index 000000000000..0fc879bb8e8f
--- /dev/null
+++ b/pc-bios/s390-ccw/dasd-ipl.c
@@ -0,0 +1,235 @@
+/*
+ * S390 IPL (boot) from a real DASD device via vfio framework.
+ *
+ * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "libc.h"
+#include "s390-ccw.h"
+#include "s390-arch.h"
+#include "dasd-ipl.h"
+#include "helper.h"
+
+static char prefix_page[PAGE_SIZE * 2]
+ __attribute__((__aligned__(PAGE_SIZE * 2)));
+
+static void enable_prefixing(void)
+{
+ memcpy(&prefix_page, lowcore, 4096);
+ set_prefix(ptr2u32(&prefix_page));
+}
+
+static void disable_prefixing(void)
+{
+ set_prefix(0);
+ /* Copy io interrupt info back to low core */
+ memcpy((void *)&lowcore->subchannel_id, prefix_page + 0xB8, 12);
+}
+
+static bool is_read_tic_ccw_chain(Ccw0 *ccw)
+{
+ Ccw0 *next_ccw = ccw + 1;
+
+ return ((ccw->cmd_code == CCW_CMD_DASD_READ ||
+ ccw->cmd_code == CCW_CMD_DASD_READ_MT) &&
+ ccw->chain && next_ccw->cmd_code == CCW_CMD_TIC);
+}
+
+static bool dynamic_cp_fixup(uint32_t ccw_addr, uint32_t *next_cpa)
+{
+ Ccw0 *cur_ccw = (Ccw0 *)(uint64_t)ccw_addr;
+ Ccw0 *tic_ccw;
+
+ while (true) {
+ /* Skip over inline TIC (it might not have the chain bit on) */
+ if (cur_ccw->cmd_code == CCW_CMD_TIC &&
+ cur_ccw->cda == ptr2u32(cur_ccw) - 8) {
+ cur_ccw += 1;
+ continue;
+ }
+
+ if (!cur_ccw->chain) {
+ break;
+ }
+ if (is_read_tic_ccw_chain(cur_ccw)) {
+ /*
+ * Breaking a chain of CCWs may alter the semantics or even the
+ * validity of a channel program. The heuristic implemented below
+ * seems to work well in practice for the channel programs
+ * generated by zipl.
+ */
+ tic_ccw = cur_ccw + 1;
+ *next_cpa = tic_ccw->cda;
+ cur_ccw->chain = 0;
+ return true;
+ }
+ cur_ccw += 1;
+ }
+ return false;
+}
+
+static int run_dynamic_ccw_program(SubChannelId schid, uint16_t cutype,
+ uint32_t cpa)
+{
+ bool has_next;
+ uint32_t next_cpa = 0;
+ int rc;
+
+ do {
+ has_next = dynamic_cp_fixup(cpa, &next_cpa);
+
+ print_int("executing ccw chain at ", cpa);
+ enable_prefixing();
+ rc = do_cio(schid, cutype, cpa, CCW_FMT0);
+ disable_prefixing();
+
+ if (rc) {
+ break;
+ }
+ cpa = next_cpa;
+ } while (has_next);
+
+ return rc;
+}
+
+static void make_readipl(void)
+{
+ Ccw0 *ccwIplRead = (Ccw0 *)0x00;
+
+ /* Create Read IPL ccw at address 0 */
+ ccwIplRead->cmd_code = CCW_CMD_READ_IPL;
+ ccwIplRead->cda = 0x00; /* Read into address 0x00 in main memory */
+ ccwIplRead->chain = 0; /* Chain flag */
+ ccwIplRead->count = 0x18; /* Read 0x18 bytes of data */
+}
+
+static void run_readipl(SubChannelId schid, uint16_t cutype)
+{
+ if (do_cio(schid, cutype, 0x00, CCW_FMT0)) {
+ panic("dasd-ipl: Failed to run Read IPL channel program\n");
+ }
+}
+
+/*
+ * The architecture states that IPL1 data should consist of a psw followed by
+ * format-0 READ and TIC CCWs. Let's sanity check.
+ */
+static void check_ipl1(void)
+{
+ Ccw0 *ccwread = (Ccw0 *)0x08;
+ Ccw0 *ccwtic = (Ccw0 *)0x10;
+
+ if (ccwread->cmd_code != CCW_CMD_DASD_READ ||
+ ccwtic->cmd_code != CCW_CMD_TIC) {
+ panic("dasd-ipl: IPL1 data invalid. Is this disk really bootable?\n");
+ }
+}
+
+static void check_ipl2(uint32_t ipl2_addr)
+{
+ Ccw0 *ccw = u32toptr(ipl2_addr);
+
+ if (ipl2_addr == 0x00) {
+ panic("IPL2 address invalid. Is this disk really bootable?\n");
+ }
+ if (ccw->cmd_code == 0x00) {
+ panic("IPL2 ccw data invalid. Is this disk really bootable?\n");
+ }
+}
+
+static uint32_t read_ipl2_addr(void)
+{
+ Ccw0 *ccwtic = (Ccw0 *)0x10;
+
+ return ccwtic->cda;
+}
+
+static void ipl1_fixup(void)
+{
+ Ccw0 *ccwSeek = (Ccw0 *) 0x08;
+ Ccw0 *ccwSearchID = (Ccw0 *) 0x10;
+ Ccw0 *ccwSearchTic = (Ccw0 *) 0x18;
+ Ccw0 *ccwRead = (Ccw0 *) 0x20;
+ CcwSeekData *seekData = (CcwSeekData *) 0x30;
+ CcwSearchIdData *searchData = (CcwSearchIdData *) 0x38;
+
+ /* move IPL1 CCWs to make room for CCWs needed to locate record 2 */
+ memcpy(ccwRead, (void *)0x08, 16);
+
+ /* Disable chaining so we don't TIC to IPL2 channel program */
+ ccwRead->chain = 0x00;
+
+ ccwSeek->cmd_code = CCW_CMD_DASD_SEEK;
+ ccwSeek->cda = ptr2u32(seekData);
+ ccwSeek->chain = 1;
+ ccwSeek->count = sizeof(*seekData);
+ seekData->reserved = 0x00;
+ seekData->cyl = 0x00;
+ seekData->head = 0x00;
+
+ ccwSearchID->cmd_code = CCW_CMD_DASD_SEARCH_ID_EQ;
+ ccwSearchID->cda = ptr2u32(searchData);
+ ccwSearchID->chain = 1;
+ ccwSearchID->count = sizeof(*searchData);
+ searchData->cyl = 0;
+ searchData->head = 0;
+ searchData->record = 2;
+
+ /* Go back to Search CCW if correct record not yet found */
+ ccwSearchTic->cmd_code = CCW_CMD_TIC;
+ ccwSearchTic->cda = ptr2u32(ccwSearchID);
+}
+
+static void run_ipl1(SubChannelId schid, uint16_t cutype)
+ {
+ uint32_t startAddr = 0x08;
+
+ if (do_cio(schid, cutype, startAddr, CCW_FMT0)) {
+ panic("dasd-ipl: Failed to run IPL1 channel program\n");
+ }
+}
+
+static void run_ipl2(SubChannelId schid, uint16_t cutype, uint32_t addr)
+{
+ if (run_dynamic_ccw_program(schid, cutype, addr)) {
+ panic("dasd-ipl: Failed to run IPL2 channel program\n");
+ }
+}
+
+/*
+ * Limitations in vfio-ccw support complicate the IPL process. Details can
+ * be found in docs/devel/s390-dasd-ipl.txt
+ */
+void dasd_ipl(SubChannelId schid, uint16_t cutype)
+{
+ PSWLegacy *pswl = (PSWLegacy *) 0x00;
+ uint32_t ipl2_addr;
+
+ /* Construct Read IPL CCW and run it to read IPL1 from boot disk */
+ make_readipl();
+ run_readipl(schid, cutype);
+ ipl2_addr = read_ipl2_addr();
+ check_ipl1();
+
+ /*
+ * Fixup IPL1 channel program to account for vfio-ccw limitations, then run
+ * it to read IPL2 channel program from boot disk.
+ */
+ ipl1_fixup();
+ run_ipl1(schid, cutype);
+ check_ipl2(ipl2_addr);
+
+ /*
+ * Run IPL2 channel program to read operating system code from boot disk
+ */
+ run_ipl2(schid, cutype, ipl2_addr);
+
+ /* Transfer control to the guest operating system */
+ pswl->mask |= PSW_MASK_EAMODE; /* Force z-mode */
+ pswl->addr |= PSW_MASK_BAMODE; /* ... */
+ jump_to_low_kernel();
+}
diff --git a/pc-bios/s390-ccw/dasd-ipl.h b/pc-bios/s390-ccw/dasd-ipl.h
new file mode 100644
index 000000000000..c3948289062c
--- /dev/null
+++ b/pc-bios/s390-ccw/dasd-ipl.h
@@ -0,0 +1,16 @@
+/*
+ * S390 IPL (boot) from a real DASD device via vfio framework.
+ *
+ * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef DASD_IPL_H
+#define DASD_IPL_H
+
+void dasd_ipl(SubChannelId schid, uint16_t cutype);
+
+#endif /* DASD_IPL_H */
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 57a10138c65d..3c449ad49688 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -13,6 +13,7 @@
#include "s390-ccw.h"
#include "cio.h"
#include "virtio.h"
+#include "dasd-ipl.h"
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
static SubChannelId blk_schid = { .one = 1 };
@@ -209,6 +210,10 @@ int main(void)
cutype = cu_type(blk_schid);
switch (cutype) {
+ case CU_TYPE_DASD_3990:
+ case CU_TYPE_DASD_2107:
+ dasd_ipl(blk_schid, cutype); /* no return */
+ break;
case CU_TYPE_VIRTIO:
virtio_setup();
zipl_load(); /* no return */
diff --git a/pc-bios/s390-ccw/s390-arch.h b/pc-bios/s390-ccw/s390-arch.h
index 5e92c7a27d53..504fc7c2f098 100644
--- a/pc-bios/s390-ccw/s390-arch.h
+++ b/pc-bios/s390-ccw/s390-arch.h
@@ -87,4 +87,17 @@ typedef struct LowCore {
extern LowCore const *lowcore;
+static inline void set_prefix(uint32_t address)
+{
+ asm volatile("spx %0" : : "m" (address) : "memory");
+}
+
+static inline uint32_t store_prefix(void)
+{
+ uint32_t address;
+
+ asm volatile("stpx %0" : "=m" (address));
+ return address;
+}
+
#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 15/19] s390-bios: Support booting from real dasd device
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
Allows guest to boot from a vfio configured real dasd device.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-16-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
MAINTAINERS | 1 +
docs/devel/s390-dasd-ipl.txt | 133 ++++++++++++++++++++
pc-bios/s390-ccw/Makefile | 2 +-
pc-bios/s390-ccw/dasd-ipl.c | 235 +++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/dasd-ipl.h | 16 +++
pc-bios/s390-ccw/main.c | 5 +
pc-bios/s390-ccw/s390-arch.h | 13 ++
7 files changed, 404 insertions(+), 1 deletion(-)
create mode 100644 docs/devel/s390-dasd-ipl.txt
create mode 100644 pc-bios/s390-ccw/dasd-ipl.c
create mode 100644 pc-bios/s390-ccw/dasd-ipl.h
diff --git a/MAINTAINERS b/MAINTAINERS
index f7976aa43d0a..be53b7d3b703 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1181,6 +1181,7 @@ S: Supported
F: hw/s390x/ipl.*
F: pc-bios/s390-ccw/
F: pc-bios/s390-ccw.img
+F: docs/devel/s390-dasd-ipl.txt
T: git https://github.com/borntraeger/qemu.git s390-next
L: qemu-s390x@nongnu.org
diff --git a/docs/devel/s390-dasd-ipl.txt b/docs/devel/s390-dasd-ipl.txt
new file mode 100644
index 000000000000..9107e048e4e6
--- /dev/null
+++ b/docs/devel/s390-dasd-ipl.txt
@@ -0,0 +1,133 @@
+*****************************
+***** s390 hardware IPL *****
+*****************************
+
+The s390 hardware IPL process consists of the following steps.
+
+1. A READ IPL ccw is constructed in memory location 0x0.
+ This ccw, by definition, reads the IPL1 record which is located on the disk
+ at cylinder 0 track 0 record 1. Note that the chain flag is on in this ccw
+ so when it is complete another ccw will be fetched and executed from memory
+ location 0x08.
+
+2. Execute the Read IPL ccw at 0x00, thereby reading IPL1 data into 0x00.
+ IPL1 data is 24 bytes in length and consists of the following pieces of
+ information: [psw][read ccw][tic ccw]. When the machine executes the Read
+ IPL ccw it read the 24-bytes of IPL1 to be read into memory starting at
+ location 0x0. Then the ccw program at 0x08 which consists of a read
+ ccw and a tic ccw is automatically executed because of the chain flag from
+ the original READ IPL ccw. The read ccw will read the IPL2 data into memory
+ and the TIC (Transfer In Channel) will transfer control to the channel
+ program contained in the IPL2 data. The TIC channel command is the
+ equivalent of a branch/jump/goto instruction for channel programs.
+ NOTE: The ccws in IPL1 are defined by the architecture to be format 0.
+
+3. Execute IPL2.
+ The TIC ccw instruction at the end of the IPL1 channel program will begin
+ the execution of the IPL2 channel program. IPL2 is stage-2 of the boot
+ process and will contain a larger channel program than IPL1. The point of
+ IPL2 is to find and load either the operating system or a small program that
+ loads the operating system from disk. At the end of this step all or some of
+ the real operating system is loaded into memory and we are ready to hand
+ control over to the guest operating system. At this point the guest
+ operating system is entirely responsible for loading any more data it might
+ need to function. NOTE: The IPL2 channel program might read data into memory
+ location 0 thereby overwriting the IPL1 psw and channel program. This is ok
+ as long as the data placed in location 0 contains a psw whose instruction
+ address points to the guest operating system code to execute at the end of
+ the IPL/boot process.
+ NOTE: The ccws in IPL2 are defined by the architecture to be format 0.
+
+4. Start executing the guest operating system.
+ The psw that was loaded into memory location 0 as part of the ipl process
+ should contain the needed flags for the operating system we have loaded. The
+ psw's instruction address will point to the location in memory where we want
+ to start executing the operating system. This psw is loaded (via LPSW
+ instruction) causing control to be passed to the operating system code.
+
+In a non-virtualized environment this process, handled entirely by the hardware,
+is kicked off by the user initiating a "Load" procedure from the hardware
+management console. This "Load" procedure crafts a special "Read IPL" ccw in
+memory location 0x0 that reads IPL1. It then executes this ccw thereby kicking
+off the reading of IPL1 data. Since the channel program from IPL1 will be
+written immediately after the special "Read IPL" ccw, the IPL1 channel program
+will be executed immediately (the special read ccw has the chaining bit turned
+on). The TIC at the end of the IPL1 channel program will cause the IPL2 channel
+program to be executed automatically. After this sequence completes the "Load"
+procedure then loads the psw from 0x0.
+
+**********************************************************
+***** How this all pertains to QEMU (and the kernel) *****
+**********************************************************
+
+In theory we should merely have to do the following to IPL/boot a guest
+operating system from a DASD device:
+
+1. Place a "Read IPL" ccw into memory location 0x0 with chaining bit on.
+2. Execute channel program at 0x0.
+3. LPSW 0x0.
+
+However, our emulation of the machine's channel program logic within the kernel
+is missing one key feature that is required for this process to work:
+non-prefetch of ccw data.
+
+When we start a channel program we pass the channel subsystem parameters via an
+ORB (Operation Request Block). One of those parameters is a prefetch bit. If the
+bit is on then the vfio-ccw kernel driver is allowed to read the entire channel
+program from guest memory before it starts executing it. This means that any
+channel commands that read additional channel commands will not work as expected
+because the newly read commands will only exist in guest memory and NOT within
+the kernel's channel subsystem memory. The kernel vfio-ccw driver currently
+requires this bit to be on for all channel programs. This is a problem because
+the IPL process consists of transferring control from the "Read IPL" ccw
+immediately to the IPL1 channel program that was read by "Read IPL".
+
+Not being able to turn off prefetch will also prevent the TIC at the end of the
+IPL1 channel program from transferring control to the IPL2 channel program.
+
+Lastly, in some cases (the zipl bootloader for example) the IPL2 program also
+transfers control to another channel program segment immediately after reading
+it from the disk. So we need to be able to handle this case.
+
+**************************
+***** What QEMU does *****
+**************************
+
+Since we are forced to live with prefetch we cannot use the very simple IPL
+procedure we defined in the preceding section. So we compensate by doing the
+following.
+
+1. Place "Read IPL" ccw into memory location 0x0, but turn off chaining bit.
+2. Execute "Read IPL" at 0x0.
+
+ So now IPL1's psw is at 0x0 and IPL1's channel program is at 0x08.
+
+4. Write a custom channel program that will seek to the IPL2 record and then
+ execute the READ and TIC ccws from IPL1. Normally the seek is not required
+ because after reading the IPL1 record the disk is automatically positioned
+ to read the very next record which will be IPL2. But since we are not reading
+ both IPL1 and IPL2 as part of the same channel program we must manually set
+ the position.
+
+5. Grab the target address of the TIC instruction from the IPL1 channel program.
+ This address is where the IPL2 channel program starts.
+
+ Now IPL2 is loaded into memory somewhere, and we know the address.
+
+6. Execute the IPL2 channel program at the address obtained in step #5.
+
+ Because this channel program can be dynamic, we must use a special algorithm
+ that detects a READ immediately followed by a TIC and breaks the ccw chain
+ by turning off the chain bit in the READ ccw. When control is returned from
+ the kernel/hardware to the QEMU bios code we immediately issue another start
+ subchannel to execute the remaining TIC instruction. This causes the entire
+ channel program (starting from the TIC) and all needed data to be refetched
+ thereby stepping around the limitation that would otherwise prevent this
+ channel program from executing properly.
+
+ Now the operating system code is loaded somewhere in guest memory and the psw
+ in memory location 0x0 will point to entry code for the guest operating
+ system.
+
+7. LPSW 0x0.
+ LPSW transfers control to the guest operating system and we're done.
diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile
index 12ad9c1d5813..a048b6b077a9 100644
--- a/pc-bios/s390-ccw/Makefile
+++ b/pc-bios/s390-ccw/Makefile
@@ -10,7 +10,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
.PHONY : all clean build-all
OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \
- virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o
+ virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o dasd-ipl.o
QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS))
QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float
diff --git a/pc-bios/s390-ccw/dasd-ipl.c b/pc-bios/s390-ccw/dasd-ipl.c
new file mode 100644
index 000000000000..0fc879bb8e8f
--- /dev/null
+++ b/pc-bios/s390-ccw/dasd-ipl.c
@@ -0,0 +1,235 @@
+/*
+ * S390 IPL (boot) from a real DASD device via vfio framework.
+ *
+ * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "libc.h"
+#include "s390-ccw.h"
+#include "s390-arch.h"
+#include "dasd-ipl.h"
+#include "helper.h"
+
+static char prefix_page[PAGE_SIZE * 2]
+ __attribute__((__aligned__(PAGE_SIZE * 2)));
+
+static void enable_prefixing(void)
+{
+ memcpy(&prefix_page, lowcore, 4096);
+ set_prefix(ptr2u32(&prefix_page));
+}
+
+static void disable_prefixing(void)
+{
+ set_prefix(0);
+ /* Copy io interrupt info back to low core */
+ memcpy((void *)&lowcore->subchannel_id, prefix_page + 0xB8, 12);
+}
+
+static bool is_read_tic_ccw_chain(Ccw0 *ccw)
+{
+ Ccw0 *next_ccw = ccw + 1;
+
+ return ((ccw->cmd_code == CCW_CMD_DASD_READ ||
+ ccw->cmd_code == CCW_CMD_DASD_READ_MT) &&
+ ccw->chain && next_ccw->cmd_code == CCW_CMD_TIC);
+}
+
+static bool dynamic_cp_fixup(uint32_t ccw_addr, uint32_t *next_cpa)
+{
+ Ccw0 *cur_ccw = (Ccw0 *)(uint64_t)ccw_addr;
+ Ccw0 *tic_ccw;
+
+ while (true) {
+ /* Skip over inline TIC (it might not have the chain bit on) */
+ if (cur_ccw->cmd_code == CCW_CMD_TIC &&
+ cur_ccw->cda == ptr2u32(cur_ccw) - 8) {
+ cur_ccw += 1;
+ continue;
+ }
+
+ if (!cur_ccw->chain) {
+ break;
+ }
+ if (is_read_tic_ccw_chain(cur_ccw)) {
+ /*
+ * Breaking a chain of CCWs may alter the semantics or even the
+ * validity of a channel program. The heuristic implemented below
+ * seems to work well in practice for the channel programs
+ * generated by zipl.
+ */
+ tic_ccw = cur_ccw + 1;
+ *next_cpa = tic_ccw->cda;
+ cur_ccw->chain = 0;
+ return true;
+ }
+ cur_ccw += 1;
+ }
+ return false;
+}
+
+static int run_dynamic_ccw_program(SubChannelId schid, uint16_t cutype,
+ uint32_t cpa)
+{
+ bool has_next;
+ uint32_t next_cpa = 0;
+ int rc;
+
+ do {
+ has_next = dynamic_cp_fixup(cpa, &next_cpa);
+
+ print_int("executing ccw chain at ", cpa);
+ enable_prefixing();
+ rc = do_cio(schid, cutype, cpa, CCW_FMT0);
+ disable_prefixing();
+
+ if (rc) {
+ break;
+ }
+ cpa = next_cpa;
+ } while (has_next);
+
+ return rc;
+}
+
+static void make_readipl(void)
+{
+ Ccw0 *ccwIplRead = (Ccw0 *)0x00;
+
+ /* Create Read IPL ccw at address 0 */
+ ccwIplRead->cmd_code = CCW_CMD_READ_IPL;
+ ccwIplRead->cda = 0x00; /* Read into address 0x00 in main memory */
+ ccwIplRead->chain = 0; /* Chain flag */
+ ccwIplRead->count = 0x18; /* Read 0x18 bytes of data */
+}
+
+static void run_readipl(SubChannelId schid, uint16_t cutype)
+{
+ if (do_cio(schid, cutype, 0x00, CCW_FMT0)) {
+ panic("dasd-ipl: Failed to run Read IPL channel program\n");
+ }
+}
+
+/*
+ * The architecture states that IPL1 data should consist of a psw followed by
+ * format-0 READ and TIC CCWs. Let's sanity check.
+ */
+static void check_ipl1(void)
+{
+ Ccw0 *ccwread = (Ccw0 *)0x08;
+ Ccw0 *ccwtic = (Ccw0 *)0x10;
+
+ if (ccwread->cmd_code != CCW_CMD_DASD_READ ||
+ ccwtic->cmd_code != CCW_CMD_TIC) {
+ panic("dasd-ipl: IPL1 data invalid. Is this disk really bootable?\n");
+ }
+}
+
+static void check_ipl2(uint32_t ipl2_addr)
+{
+ Ccw0 *ccw = u32toptr(ipl2_addr);
+
+ if (ipl2_addr == 0x00) {
+ panic("IPL2 address invalid. Is this disk really bootable?\n");
+ }
+ if (ccw->cmd_code == 0x00) {
+ panic("IPL2 ccw data invalid. Is this disk really bootable?\n");
+ }
+}
+
+static uint32_t read_ipl2_addr(void)
+{
+ Ccw0 *ccwtic = (Ccw0 *)0x10;
+
+ return ccwtic->cda;
+}
+
+static void ipl1_fixup(void)
+{
+ Ccw0 *ccwSeek = (Ccw0 *) 0x08;
+ Ccw0 *ccwSearchID = (Ccw0 *) 0x10;
+ Ccw0 *ccwSearchTic = (Ccw0 *) 0x18;
+ Ccw0 *ccwRead = (Ccw0 *) 0x20;
+ CcwSeekData *seekData = (CcwSeekData *) 0x30;
+ CcwSearchIdData *searchData = (CcwSearchIdData *) 0x38;
+
+ /* move IPL1 CCWs to make room for CCWs needed to locate record 2 */
+ memcpy(ccwRead, (void *)0x08, 16);
+
+ /* Disable chaining so we don't TIC to IPL2 channel program */
+ ccwRead->chain = 0x00;
+
+ ccwSeek->cmd_code = CCW_CMD_DASD_SEEK;
+ ccwSeek->cda = ptr2u32(seekData);
+ ccwSeek->chain = 1;
+ ccwSeek->count = sizeof(*seekData);
+ seekData->reserved = 0x00;
+ seekData->cyl = 0x00;
+ seekData->head = 0x00;
+
+ ccwSearchID->cmd_code = CCW_CMD_DASD_SEARCH_ID_EQ;
+ ccwSearchID->cda = ptr2u32(searchData);
+ ccwSearchID->chain = 1;
+ ccwSearchID->count = sizeof(*searchData);
+ searchData->cyl = 0;
+ searchData->head = 0;
+ searchData->record = 2;
+
+ /* Go back to Search CCW if correct record not yet found */
+ ccwSearchTic->cmd_code = CCW_CMD_TIC;
+ ccwSearchTic->cda = ptr2u32(ccwSearchID);
+}
+
+static void run_ipl1(SubChannelId schid, uint16_t cutype)
+ {
+ uint32_t startAddr = 0x08;
+
+ if (do_cio(schid, cutype, startAddr, CCW_FMT0)) {
+ panic("dasd-ipl: Failed to run IPL1 channel program\n");
+ }
+}
+
+static void run_ipl2(SubChannelId schid, uint16_t cutype, uint32_t addr)
+{
+ if (run_dynamic_ccw_program(schid, cutype, addr)) {
+ panic("dasd-ipl: Failed to run IPL2 channel program\n");
+ }
+}
+
+/*
+ * Limitations in vfio-ccw support complicate the IPL process. Details can
+ * be found in docs/devel/s390-dasd-ipl.txt
+ */
+void dasd_ipl(SubChannelId schid, uint16_t cutype)
+{
+ PSWLegacy *pswl = (PSWLegacy *) 0x00;
+ uint32_t ipl2_addr;
+
+ /* Construct Read IPL CCW and run it to read IPL1 from boot disk */
+ make_readipl();
+ run_readipl(schid, cutype);
+ ipl2_addr = read_ipl2_addr();
+ check_ipl1();
+
+ /*
+ * Fixup IPL1 channel program to account for vfio-ccw limitations, then run
+ * it to read IPL2 channel program from boot disk.
+ */
+ ipl1_fixup();
+ run_ipl1(schid, cutype);
+ check_ipl2(ipl2_addr);
+
+ /*
+ * Run IPL2 channel program to read operating system code from boot disk
+ */
+ run_ipl2(schid, cutype, ipl2_addr);
+
+ /* Transfer control to the guest operating system */
+ pswl->mask |= PSW_MASK_EAMODE; /* Force z-mode */
+ pswl->addr |= PSW_MASK_BAMODE; /* ... */
+ jump_to_low_kernel();
+}
diff --git a/pc-bios/s390-ccw/dasd-ipl.h b/pc-bios/s390-ccw/dasd-ipl.h
new file mode 100644
index 000000000000..c3948289062c
--- /dev/null
+++ b/pc-bios/s390-ccw/dasd-ipl.h
@@ -0,0 +1,16 @@
+/*
+ * S390 IPL (boot) from a real DASD device via vfio framework.
+ *
+ * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef DASD_IPL_H
+#define DASD_IPL_H
+
+void dasd_ipl(SubChannelId schid, uint16_t cutype);
+
+#endif /* DASD_IPL_H */
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 57a10138c65d..3c449ad49688 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -13,6 +13,7 @@
#include "s390-ccw.h"
#include "cio.h"
#include "virtio.h"
+#include "dasd-ipl.h"
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
static SubChannelId blk_schid = { .one = 1 };
@@ -209,6 +210,10 @@ int main(void)
cutype = cu_type(blk_schid);
switch (cutype) {
+ case CU_TYPE_DASD_3990:
+ case CU_TYPE_DASD_2107:
+ dasd_ipl(blk_schid, cutype); /* no return */
+ break;
case CU_TYPE_VIRTIO:
virtio_setup();
zipl_load(); /* no return */
diff --git a/pc-bios/s390-ccw/s390-arch.h b/pc-bios/s390-ccw/s390-arch.h
index 5e92c7a27d53..504fc7c2f098 100644
--- a/pc-bios/s390-ccw/s390-arch.h
+++ b/pc-bios/s390-ccw/s390-arch.h
@@ -87,4 +87,17 @@ typedef struct LowCore {
extern LowCore const *lowcore;
+static inline void set_prefix(uint32_t address)
+{
+ asm volatile("spx %0" : : "m" (address) : "memory");
+}
+
+static inline uint32_t store_prefix(void)
+{
+ uint32_t address;
+
+ asm volatile("stpx %0" : "=m" (address));
+ return address;
+}
+
#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 16/19] s390-bios: Use control unit type to find bootable devices
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Jason J. Herne, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
When the user does not specify which device to boot from then we end
up guessing. Instead of simply grabbing the first available device let's
be a little bit smarter and only choose devices that might be bootable
like disk, and not console devices.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Message-Id: <1554388475-18329-17-git-send-email-jjherne@linux.ibm.com>
[thuth: Added fix for virtio_is_supported() not being called anymore]
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 45 ++++++++++++++++++++++++++++++++---------
1 file changed, 35 insertions(+), 10 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 3c449ad49688..a69c73349e8f 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -21,6 +21,7 @@ static char loadparm_str[LOADPARM_LEN + 1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
QemuIplParameters qipl;
IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static bool have_iplb;
+static uint16_t cutype;
LowCore const *lowcore; /* Yes, this *is* a pointer to address 0 */
#define LOADPARM_PROMPT "PROMPT "
@@ -58,11 +59,15 @@ unsigned int get_loadparm_index(void)
* subchannel information block (schib) with the connected subchannel's info.
* NOTE: The global variable blk_schid is updated to contain the subchannel
* information.
+ *
+ * If the caller gives dev_no=-1 then the user did not specify a boot device.
+ * In this case we'll just use the first potentially bootable device we find.
*/
static bool find_subch(int dev_no)
{
Schib schib;
int i, r;
+ bool is_virtio;
for (i = 0; i < 0x10000; i++) {
blk_schid.sch_no = i;
@@ -74,16 +79,39 @@ static bool find_subch(int dev_no)
continue;
}
- /* Skip net devices since no IPLB is created and therefore no
- * network bootloader has been loaded
- */
enable_subchannel(blk_schid);
- if (virtio_is_supported(blk_schid) &&
- virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
- continue;
+ cutype = cu_type(blk_schid);
+
+ /*
+ * Note: we always have to run virtio_is_supported() here to make
+ * sure that the vdev.senseid data gets pre-initialized correctly
+ */
+ is_virtio = virtio_is_supported(blk_schid);
+
+ /* No specific devno given, just return 1st possibly bootable device */
+ if (dev_no < 0) {
+ switch (cutype) {
+ case CU_TYPE_VIRTIO:
+ if (is_virtio) {
+ /*
+ * Skip net devices since no IPLB is created and therefore
+ * no network bootloader has been loaded
+ */
+ if (virtio_get_device_type() != VIRTIO_ID_NET) {
+ return true;
+ }
+ }
+ continue;
+ case CU_TYPE_DASD_3990:
+ case CU_TYPE_DASD_2107:
+ return true;
+ default:
+ continue;
+ }
}
- if ((dev_no < 0) || (schib.pmcw.dev == dev_no)) {
+ /* Caller asked for a specific devno */
+ if (schib.pmcw.dev == dev_no) {
return true;
}
}
@@ -200,15 +228,12 @@ static void virtio_setup(void)
int main(void)
{
- uint16_t cutype;
-
sclp_setup();
css_setup();
boot_setup();
find_boot_device();
enable_subchannel(blk_schid);
- cutype = cu_type(blk_schid);
switch (cutype) {
case CU_TYPE_DASD_3990:
case CU_TYPE_DASD_2107:
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 16/19] s390-bios: Use control unit type to find bootable devices
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Jason J. Herne, qemu-s390x, qemu-devel, Thomas Huth
From: "Jason J. Herne" <jjherne@linux.ibm.com>
When the user does not specify which device to boot from then we end
up guessing. Instead of simply grabbing the first available device let's
be a little bit smarter and only choose devices that might be bootable
like disk, and not console devices.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Message-Id: <1554388475-18329-17-git-send-email-jjherne@linux.ibm.com>
[thuth: Added fix for virtio_is_supported() not being called anymore]
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 45 ++++++++++++++++++++++++++++++++---------
1 file changed, 35 insertions(+), 10 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 3c449ad49688..a69c73349e8f 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -21,6 +21,7 @@ static char loadparm_str[LOADPARM_LEN + 1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
QemuIplParameters qipl;
IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
static bool have_iplb;
+static uint16_t cutype;
LowCore const *lowcore; /* Yes, this *is* a pointer to address 0 */
#define LOADPARM_PROMPT "PROMPT "
@@ -58,11 +59,15 @@ unsigned int get_loadparm_index(void)
* subchannel information block (schib) with the connected subchannel's info.
* NOTE: The global variable blk_schid is updated to contain the subchannel
* information.
+ *
+ * If the caller gives dev_no=-1 then the user did not specify a boot device.
+ * In this case we'll just use the first potentially bootable device we find.
*/
static bool find_subch(int dev_no)
{
Schib schib;
int i, r;
+ bool is_virtio;
for (i = 0; i < 0x10000; i++) {
blk_schid.sch_no = i;
@@ -74,16 +79,39 @@ static bool find_subch(int dev_no)
continue;
}
- /* Skip net devices since no IPLB is created and therefore no
- * network bootloader has been loaded
- */
enable_subchannel(blk_schid);
- if (virtio_is_supported(blk_schid) &&
- virtio_get_device_type() == VIRTIO_ID_NET && dev_no < 0) {
- continue;
+ cutype = cu_type(blk_schid);
+
+ /*
+ * Note: we always have to run virtio_is_supported() here to make
+ * sure that the vdev.senseid data gets pre-initialized correctly
+ */
+ is_virtio = virtio_is_supported(blk_schid);
+
+ /* No specific devno given, just return 1st possibly bootable device */
+ if (dev_no < 0) {
+ switch (cutype) {
+ case CU_TYPE_VIRTIO:
+ if (is_virtio) {
+ /*
+ * Skip net devices since no IPLB is created and therefore
+ * no network bootloader has been loaded
+ */
+ if (virtio_get_device_type() != VIRTIO_ID_NET) {
+ return true;
+ }
+ }
+ continue;
+ case CU_TYPE_DASD_3990:
+ case CU_TYPE_DASD_2107:
+ return true;
+ default:
+ continue;
+ }
}
- if ((dev_no < 0) || (schib.pmcw.dev == dev_no)) {
+ /* Caller asked for a specific devno */
+ if (schib.pmcw.dev == dev_no) {
return true;
}
}
@@ -200,15 +228,12 @@ static void virtio_setup(void)
int main(void)
{
- uint16_t cutype;
-
sclp_setup();
css_setup();
boot_setup();
find_boot_device();
enable_subchannel(blk_schid);
- cutype = cu_type(blk_schid);
switch (cutype) {
case CU_TYPE_DASD_3990:
case CU_TYPE_DASD_2107:
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 17/19] pc-bios/s390: Update firmware images
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, Thomas Huth
From: Thomas Huth <thuth@redhat.com>
s390-ccw.img contains support for booting from vfio-ccw dasd passthrough
devices now, and s390-netboot.img is updated since there were changes
to the code that is shared between s390-ccw.img and s390-netboot.img.
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw.img | Bin 34568 -> 42608 bytes
pc-bios/s390-netboot.img | Bin 54944 -> 67232 bytes
2 files changed, 0 insertions(+), 0 deletions(-)
diff --git a/pc-bios/s390-ccw.img b/pc-bios/s390-ccw.img
index 450a076dc0ad9f2babc7f2e3005ea05a1082a808..ba054828d35d72fd1ed5521a48f43f593a1c291f 100644
GIT binary patch
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diff --git a/pc-bios/s390-netboot.img b/pc-bios/s390-netboot.img
index 2c6886efb8320ff711589119ffbf077e68ec8784..aa90fbccb142470924ad5f0de5a4c6337916c63a 100644
GIT binary patch
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--
2.17.2
^ permalink raw reply [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 17/19] pc-bios/s390: Update firmware images
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: Thomas Huth, qemu-s390x, qemu-devel
From: Thomas Huth <thuth@redhat.com>
s390-ccw.img contains support for booting from vfio-ccw dasd passthrough
devices now, and s390-netboot.img is updated since there were changes
to the code that is shared between s390-ccw.img and s390-netboot.img.
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw.img | Bin 34568 -> 42608 bytes
pc-bios/s390-netboot.img | Bin 54944 -> 67232 bytes
2 files changed, 0 insertions(+), 0 deletions(-)
diff --git a/pc-bios/s390-ccw.img b/pc-bios/s390-ccw.img
index 450a076dc0ad9f2babc7f2e3005ea05a1082a808..ba054828d35d72fd1ed5521a48f43f593a1c291f 100644
GIT binary patch
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diff --git a/pc-bios/s390-netboot.img b/pc-bios/s390-netboot.img
index 2c6886efb8320ff711589119ffbf077e68ec8784..aa90fbccb142470924ad5f0de5a4c6337916c63a 100644
GIT binary patch
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--
2.17.2
^ permalink raw reply [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 18/19] s390x/kvm: Configure page size after memory has actually been initialized
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, David Hildenbrand, Cornelia Huck
From: David Hildenbrand <david@redhat.com>
Right now we configure the pagesize quite early, when initializing KVM.
This is long before system memory is actually allocated via
memory_region_allocate_system_memory(), and therefore memory backends
marked as mapped.
Instead, let's configure the maximum page size after initializing
memory in s390_memory_init(). cap_hpage_1m is still properly
configured before creating any CPUs, and therefore before configuring
the CPU model and eventually enabling CMMA.
This is not a fix but rather a preparation for the future, when initial
memory might reside on memory backends (not the case for s390x right now)
We will replace qemu_getrampagesize() soon by a function that will always
return the maximum page size (not the minimum page size, which only
works by pure luck so far, as there are no memory backends).
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190417113143.5551-2-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
hw/s390x/s390-virtio-ccw.c | 12 ++++++++++++
target/s390x/cpu.c | 7 +++++++
target/s390x/cpu.h | 1 +
target/s390x/kvm-stub.c | 4 ++++
target/s390x/kvm.c | 35 ++++++++++++++---------------------
target/s390x/kvm_s390x.h | 1 +
6 files changed, 39 insertions(+), 21 deletions(-)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index d11069b860b4..3be567965736 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -15,6 +15,7 @@
#include "cpu.h"
#include "hw/boards.h"
#include "exec/address-spaces.h"
+#include "exec/ram_addr.h"
#include "hw/s390x/s390-virtio-hcall.h"
#include "hw/s390x/sclp.h"
#include "hw/s390x/s390_flic.h"
@@ -163,6 +164,7 @@ static void s390_memory_init(ram_addr_t mem_size)
MemoryRegion *sysmem = get_system_memory();
ram_addr_t chunk, offset = 0;
unsigned int number = 0;
+ Error *local_err = NULL;
gchar *name;
/* allocate RAM for core */
@@ -182,6 +184,15 @@ static void s390_memory_init(ram_addr_t mem_size)
}
g_free(name);
+ /*
+ * Configure the maximum page size. As no memory devices were created
+ * yet, this is the page size of initial memory only.
+ */
+ s390_set_max_pagesize(qemu_getrampagesize(), &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ exit(EXIT_FAILURE);
+ }
/* Initialize storage key device */
s390_skeys_init();
/* Initialize storage attributes device */
@@ -253,6 +264,7 @@ static void ccw_init(MachineState *machine)
DeviceState *dev;
s390_sclp_init();
+ /* init memory + setup max page size. Required for the CPU model */
s390_memory_init(machine->ram_size);
/* init CPUs (incl. CPU model) early so s390_has_feature() works */
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index 698dd9cb82ab..b58ef0a8ef62 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -399,6 +399,13 @@ int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit)
return 0;
}
+void s390_set_max_pagesize(uint64_t pagesize, Error **errp)
+{
+ if (kvm_enabled()) {
+ kvm_s390_set_max_pagesize(pagesize, errp);
+ }
+}
+
void s390_cmma_reset(void)
{
if (kvm_enabled()) {
diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
index d8990c405a5d..7305cacc7b77 100644
--- a/target/s390x/cpu.h
+++ b/target/s390x/cpu.h
@@ -734,6 +734,7 @@ static inline void s390_do_cpu_load_normal(CPUState *cs, run_on_cpu_data arg)
/* cpu.c */
void s390_crypto_reset(void);
int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit);
+void s390_set_max_pagesize(uint64_t pagesize, Error **errp);
void s390_cmma_reset(void);
void s390_enable_css_support(S390CPU *cpu);
int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id,
diff --git a/target/s390x/kvm-stub.c b/target/s390x/kvm-stub.c
index bf7795e47a1c..22b4514ca68c 100644
--- a/target/s390x/kvm-stub.c
+++ b/target/s390x/kvm-stub.c
@@ -93,6 +93,10 @@ int kvm_s390_set_mem_limit(uint64_t new_limit, uint64_t *hw_limit)
return 0;
}
+void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp)
+{
+}
+
void kvm_s390_crypto_reset(void)
{
}
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index 2c6e35b5aafe..7df7be4a1bdc 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -283,44 +283,37 @@ void kvm_s390_crypto_reset(void)
}
}
-static int kvm_s390_configure_mempath_backing(KVMState *s)
+void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp)
{
- size_t path_psize = qemu_getrampagesize();
-
- if (path_psize == 4 * KiB) {
- return 0;
+ if (pagesize == 4 * KiB) {
+ return;
}
if (!hpage_1m_allowed()) {
- error_report("This QEMU machine does not support huge page "
- "mappings");
- return -EINVAL;
+ error_setg(errp, "This QEMU machine does not support huge page "
+ "mappings");
+ return;
}
- if (path_psize != 1 * MiB) {
- error_report("Memory backing with 2G pages was specified, "
- "but KVM does not support this memory backing");
- return -EINVAL;
+ if (pagesize != 1 * MiB) {
+ error_setg(errp, "Memory backing with 2G pages was specified, "
+ "but KVM does not support this memory backing");
+ return;
}
- if (kvm_vm_enable_cap(s, KVM_CAP_S390_HPAGE_1M, 0)) {
- error_report("Memory backing with 1M pages was specified, "
- "but KVM does not support this memory backing");
- return -EINVAL;
+ if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_HPAGE_1M, 0)) {
+ error_setg(errp, "Memory backing with 1M pages was specified, "
+ "but KVM does not support this memory backing");
+ return;
}
cap_hpage_1m = 1;
- return 0;
}
int kvm_arch_init(MachineState *ms, KVMState *s)
{
MachineClass *mc = MACHINE_GET_CLASS(ms);
- if (kvm_s390_configure_mempath_backing(s)) {
- return -EINVAL;
- }
-
mc->default_cpu_type = S390_CPU_TYPE_NAME("host");
cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
diff --git a/target/s390x/kvm_s390x.h b/target/s390x/kvm_s390x.h
index 6e52287da3f0..caf985955ba5 100644
--- a/target/s390x/kvm_s390x.h
+++ b/target/s390x/kvm_s390x.h
@@ -36,6 +36,7 @@ int kvm_s390_cmma_active(void);
void kvm_s390_cmma_reset(void);
void kvm_s390_reset_vcpu(S390CPU *cpu);
int kvm_s390_set_mem_limit(uint64_t new_limit, uint64_t *hw_limit);
+void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp);
void kvm_s390_crypto_reset(void);
void kvm_s390_restart_interrupt(S390CPU *cpu);
void kvm_s390_stop_interrupt(S390CPU *cpu);
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 18/19] s390x/kvm: Configure page size after memory has actually been initialized
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, Cornelia Huck, qemu-devel, David Hildenbrand
From: David Hildenbrand <david@redhat.com>
Right now we configure the pagesize quite early, when initializing KVM.
This is long before system memory is actually allocated via
memory_region_allocate_system_memory(), and therefore memory backends
marked as mapped.
Instead, let's configure the maximum page size after initializing
memory in s390_memory_init(). cap_hpage_1m is still properly
configured before creating any CPUs, and therefore before configuring
the CPU model and eventually enabling CMMA.
This is not a fix but rather a preparation for the future, when initial
memory might reside on memory backends (not the case for s390x right now)
We will replace qemu_getrampagesize() soon by a function that will always
return the maximum page size (not the minimum page size, which only
works by pure luck so far, as there are no memory backends).
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190417113143.5551-2-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
hw/s390x/s390-virtio-ccw.c | 12 ++++++++++++
target/s390x/cpu.c | 7 +++++++
target/s390x/cpu.h | 1 +
target/s390x/kvm-stub.c | 4 ++++
target/s390x/kvm.c | 35 ++++++++++++++---------------------
target/s390x/kvm_s390x.h | 1 +
6 files changed, 39 insertions(+), 21 deletions(-)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index d11069b860b4..3be567965736 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -15,6 +15,7 @@
#include "cpu.h"
#include "hw/boards.h"
#include "exec/address-spaces.h"
+#include "exec/ram_addr.h"
#include "hw/s390x/s390-virtio-hcall.h"
#include "hw/s390x/sclp.h"
#include "hw/s390x/s390_flic.h"
@@ -163,6 +164,7 @@ static void s390_memory_init(ram_addr_t mem_size)
MemoryRegion *sysmem = get_system_memory();
ram_addr_t chunk, offset = 0;
unsigned int number = 0;
+ Error *local_err = NULL;
gchar *name;
/* allocate RAM for core */
@@ -182,6 +184,15 @@ static void s390_memory_init(ram_addr_t mem_size)
}
g_free(name);
+ /*
+ * Configure the maximum page size. As no memory devices were created
+ * yet, this is the page size of initial memory only.
+ */
+ s390_set_max_pagesize(qemu_getrampagesize(), &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ exit(EXIT_FAILURE);
+ }
/* Initialize storage key device */
s390_skeys_init();
/* Initialize storage attributes device */
@@ -253,6 +264,7 @@ static void ccw_init(MachineState *machine)
DeviceState *dev;
s390_sclp_init();
+ /* init memory + setup max page size. Required for the CPU model */
s390_memory_init(machine->ram_size);
/* init CPUs (incl. CPU model) early so s390_has_feature() works */
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index 698dd9cb82ab..b58ef0a8ef62 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -399,6 +399,13 @@ int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit)
return 0;
}
+void s390_set_max_pagesize(uint64_t pagesize, Error **errp)
+{
+ if (kvm_enabled()) {
+ kvm_s390_set_max_pagesize(pagesize, errp);
+ }
+}
+
void s390_cmma_reset(void)
{
if (kvm_enabled()) {
diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
index d8990c405a5d..7305cacc7b77 100644
--- a/target/s390x/cpu.h
+++ b/target/s390x/cpu.h
@@ -734,6 +734,7 @@ static inline void s390_do_cpu_load_normal(CPUState *cs, run_on_cpu_data arg)
/* cpu.c */
void s390_crypto_reset(void);
int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit);
+void s390_set_max_pagesize(uint64_t pagesize, Error **errp);
void s390_cmma_reset(void);
void s390_enable_css_support(S390CPU *cpu);
int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id,
diff --git a/target/s390x/kvm-stub.c b/target/s390x/kvm-stub.c
index bf7795e47a1c..22b4514ca68c 100644
--- a/target/s390x/kvm-stub.c
+++ b/target/s390x/kvm-stub.c
@@ -93,6 +93,10 @@ int kvm_s390_set_mem_limit(uint64_t new_limit, uint64_t *hw_limit)
return 0;
}
+void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp)
+{
+}
+
void kvm_s390_crypto_reset(void)
{
}
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index 2c6e35b5aafe..7df7be4a1bdc 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -283,44 +283,37 @@ void kvm_s390_crypto_reset(void)
}
}
-static int kvm_s390_configure_mempath_backing(KVMState *s)
+void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp)
{
- size_t path_psize = qemu_getrampagesize();
-
- if (path_psize == 4 * KiB) {
- return 0;
+ if (pagesize == 4 * KiB) {
+ return;
}
if (!hpage_1m_allowed()) {
- error_report("This QEMU machine does not support huge page "
- "mappings");
- return -EINVAL;
+ error_setg(errp, "This QEMU machine does not support huge page "
+ "mappings");
+ return;
}
- if (path_psize != 1 * MiB) {
- error_report("Memory backing with 2G pages was specified, "
- "but KVM does not support this memory backing");
- return -EINVAL;
+ if (pagesize != 1 * MiB) {
+ error_setg(errp, "Memory backing with 2G pages was specified, "
+ "but KVM does not support this memory backing");
+ return;
}
- if (kvm_vm_enable_cap(s, KVM_CAP_S390_HPAGE_1M, 0)) {
- error_report("Memory backing with 1M pages was specified, "
- "but KVM does not support this memory backing");
- return -EINVAL;
+ if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_HPAGE_1M, 0)) {
+ error_setg(errp, "Memory backing with 1M pages was specified, "
+ "but KVM does not support this memory backing");
+ return;
}
cap_hpage_1m = 1;
- return 0;
}
int kvm_arch_init(MachineState *ms, KVMState *s)
{
MachineClass *mc = MACHINE_GET_CLASS(ms);
- if (kvm_s390_configure_mempath_backing(s)) {
- return -EINVAL;
- }
-
mc->default_cpu_type = S390_CPU_TYPE_NAME("host");
cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
diff --git a/target/s390x/kvm_s390x.h b/target/s390x/kvm_s390x.h
index 6e52287da3f0..caf985955ba5 100644
--- a/target/s390x/kvm_s390x.h
+++ b/target/s390x/kvm_s390x.h
@@ -36,6 +36,7 @@ int kvm_s390_cmma_active(void);
void kvm_s390_cmma_reset(void);
void kvm_s390_reset_vcpu(S390CPU *cpu);
int kvm_s390_set_mem_limit(uint64_t new_limit, uint64_t *hw_limit);
+void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp);
void kvm_s390_crypto_reset(void);
void kvm_s390_restart_interrupt(S390CPU *cpu);
void kvm_s390_stop_interrupt(S390CPU *cpu);
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 19/19] exec: Introduce qemu_maxrampagesize() and rename qemu_getrampagesize()
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, qemu-devel, David Hildenbrand, Cornelia Huck
From: David Hildenbrand <david@redhat.com>
Rename qemu_getrampagesize() to qemu_minrampagesize(). While at it,
properly rename find_max_supported_pagesize() to
find_min_backend_pagesize().
s390x is actually interested into the maximum ram pagesize, so
introduce and use qemu_maxrampagesize().
Add a TODO, indicating that looking at any mapped memory backends is not
100% correct in some cases.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190417113143.5551-3-david@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
exec.c | 44 ++++++++++++++++++++++++++++++++++----
hw/ppc/spapr_caps.c | 4 ++--
hw/s390x/s390-virtio-ccw.c | 2 +-
hw/vfio/spapr.c | 2 +-
include/exec/ram_addr.h | 3 ++-
target/ppc/kvm.c | 2 +-
6 files changed, 47 insertions(+), 10 deletions(-)
diff --git a/exec.c b/exec.c
index 2646207661d4..bb1dff423aaf 100644
--- a/exec.c
+++ b/exec.c
@@ -1688,7 +1688,7 @@ void ram_block_dump(Monitor *mon)
* when we actually open and map them. Iterate over the file
* descriptors instead, and use qemu_fd_getpagesize().
*/
-static int find_max_supported_pagesize(Object *obj, void *opaque)
+static int find_min_backend_pagesize(Object *obj, void *opaque)
{
long *hpsize_min = opaque;
@@ -1704,7 +1704,27 @@ static int find_max_supported_pagesize(Object *obj, void *opaque)
return 0;
}
-long qemu_getrampagesize(void)
+static int find_max_backend_pagesize(Object *obj, void *opaque)
+{
+ long *hpsize_max = opaque;
+
+ if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
+ HostMemoryBackend *backend = MEMORY_BACKEND(obj);
+ long hpsize = host_memory_backend_pagesize(backend);
+
+ if (host_memory_backend_is_mapped(backend) && (hpsize > *hpsize_max)) {
+ *hpsize_max = hpsize;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * TODO: We assume right now that all mapped host memory backends are
+ * used as RAM, however some might be used for different purposes.
+ */
+long qemu_minrampagesize(void)
{
long hpsize = LONG_MAX;
long mainrampagesize;
@@ -1724,7 +1744,7 @@ long qemu_getrampagesize(void)
*/
memdev_root = object_resolve_path("/objects", NULL);
if (memdev_root) {
- object_child_foreach(memdev_root, find_max_supported_pagesize, &hpsize);
+ object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize);
}
if (hpsize == LONG_MAX) {
/* No additional memory regions found ==> Report main RAM page size */
@@ -1747,8 +1767,24 @@ long qemu_getrampagesize(void)
return hpsize;
}
+
+long qemu_maxrampagesize(void)
+{
+ long pagesize = qemu_mempath_getpagesize(mem_path);
+ Object *memdev_root = object_resolve_path("/objects", NULL);
+
+ if (memdev_root) {
+ object_child_foreach(memdev_root, find_max_backend_pagesize,
+ &pagesize);
+ }
+ return pagesize;
+}
#else
-long qemu_getrampagesize(void)
+long qemu_minrampagesize(void)
+{
+ return getpagesize();
+}
+long qemu_maxrampagesize(void)
{
return getpagesize();
}
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index edc5ed0e0c4e..9b1c10baa6c5 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -347,7 +347,7 @@ static void cap_hpt_maxpagesize_apply(SpaprMachineState *spapr,
warn_report("Many guests require at least 64kiB hpt-max-page-size");
}
- spapr_check_pagesize(spapr, qemu_getrampagesize(), errp);
+ spapr_check_pagesize(spapr, qemu_minrampagesize(), errp);
}
static bool spapr_pagesize_cb(void *opaque, uint32_t seg_pshift,
@@ -609,7 +609,7 @@ static SpaprCapabilities default_caps_with_cpu(SpaprMachineState *spapr,
uint8_t mps;
if (kvmppc_hpt_needs_host_contiguous_pages()) {
- mps = ctz64(qemu_getrampagesize());
+ mps = ctz64(qemu_minrampagesize());
} else {
mps = 34; /* allow everything up to 16GiB, i.e. everything */
}
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 3be567965736..7e256d3d31b8 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -188,7 +188,7 @@ static void s390_memory_init(ram_addr_t mem_size)
* Configure the maximum page size. As no memory devices were created
* yet, this is the page size of initial memory only.
*/
- s390_set_max_pagesize(qemu_getrampagesize(), &local_err);
+ s390_set_max_pagesize(qemu_maxrampagesize(), &local_err);
if (local_err) {
error_report_err(local_err);
exit(EXIT_FAILURE);
diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c
index 57fe758e5441..96c0ad9d9b7e 100644
--- a/hw/vfio/spapr.c
+++ b/hw/vfio/spapr.c
@@ -148,7 +148,7 @@ int vfio_spapr_create_window(VFIOContainer *container,
uint64_t pagesize = memory_region_iommu_get_min_page_size(iommu_mr);
unsigned entries, bits_total, bits_per_level, max_levels;
struct vfio_iommu_spapr_tce_create create = { .argsz = sizeof(create) };
- long rampagesize = qemu_getrampagesize();
+ long rampagesize = qemu_minrampagesize();
/*
* The host might not support the guest supported IOMMU page size,
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index 9ecd911c3e78..139ad79390fa 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -73,7 +73,8 @@ static inline unsigned long int ramblock_recv_bitmap_offset(void *host_addr,
bool ramblock_is_pmem(RAMBlock *rb);
-long qemu_getrampagesize(void);
+long qemu_minrampagesize(void);
+long qemu_maxrampagesize(void);
/**
* qemu_ram_alloc_from_file,
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 2427c8ee13ae..59d92c42751e 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2136,7 +2136,7 @@ uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift)
/* Find the largest hardware supported page size that's less than
* or equal to the (logical) backing page size of guest RAM */
kvm_get_smmu_info(&info, &error_fatal);
- rampagesize = qemu_getrampagesize();
+ rampagesize = qemu_minrampagesize();
best_page_shift = 0;
for (i = 0; i < KVM_PPC_PAGE_SIZES_MAX_SZ; i++) {
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* [Qemu-devel] [PULL 19/19] exec: Introduce qemu_maxrampagesize() and rename qemu_getrampagesize()
@ 2019-04-25 13:21 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-04-25 13:21 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-s390x, Cornelia Huck, qemu-devel, David Hildenbrand
From: David Hildenbrand <david@redhat.com>
Rename qemu_getrampagesize() to qemu_minrampagesize(). While at it,
properly rename find_max_supported_pagesize() to
find_min_backend_pagesize().
s390x is actually interested into the maximum ram pagesize, so
introduce and use qemu_maxrampagesize().
Add a TODO, indicating that looking at any mapped memory backends is not
100% correct in some cases.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190417113143.5551-3-david@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
exec.c | 44 ++++++++++++++++++++++++++++++++++----
hw/ppc/spapr_caps.c | 4 ++--
hw/s390x/s390-virtio-ccw.c | 2 +-
hw/vfio/spapr.c | 2 +-
include/exec/ram_addr.h | 3 ++-
target/ppc/kvm.c | 2 +-
6 files changed, 47 insertions(+), 10 deletions(-)
diff --git a/exec.c b/exec.c
index 2646207661d4..bb1dff423aaf 100644
--- a/exec.c
+++ b/exec.c
@@ -1688,7 +1688,7 @@ void ram_block_dump(Monitor *mon)
* when we actually open and map them. Iterate over the file
* descriptors instead, and use qemu_fd_getpagesize().
*/
-static int find_max_supported_pagesize(Object *obj, void *opaque)
+static int find_min_backend_pagesize(Object *obj, void *opaque)
{
long *hpsize_min = opaque;
@@ -1704,7 +1704,27 @@ static int find_max_supported_pagesize(Object *obj, void *opaque)
return 0;
}
-long qemu_getrampagesize(void)
+static int find_max_backend_pagesize(Object *obj, void *opaque)
+{
+ long *hpsize_max = opaque;
+
+ if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
+ HostMemoryBackend *backend = MEMORY_BACKEND(obj);
+ long hpsize = host_memory_backend_pagesize(backend);
+
+ if (host_memory_backend_is_mapped(backend) && (hpsize > *hpsize_max)) {
+ *hpsize_max = hpsize;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * TODO: We assume right now that all mapped host memory backends are
+ * used as RAM, however some might be used for different purposes.
+ */
+long qemu_minrampagesize(void)
{
long hpsize = LONG_MAX;
long mainrampagesize;
@@ -1724,7 +1744,7 @@ long qemu_getrampagesize(void)
*/
memdev_root = object_resolve_path("/objects", NULL);
if (memdev_root) {
- object_child_foreach(memdev_root, find_max_supported_pagesize, &hpsize);
+ object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize);
}
if (hpsize == LONG_MAX) {
/* No additional memory regions found ==> Report main RAM page size */
@@ -1747,8 +1767,24 @@ long qemu_getrampagesize(void)
return hpsize;
}
+
+long qemu_maxrampagesize(void)
+{
+ long pagesize = qemu_mempath_getpagesize(mem_path);
+ Object *memdev_root = object_resolve_path("/objects", NULL);
+
+ if (memdev_root) {
+ object_child_foreach(memdev_root, find_max_backend_pagesize,
+ &pagesize);
+ }
+ return pagesize;
+}
#else
-long qemu_getrampagesize(void)
+long qemu_minrampagesize(void)
+{
+ return getpagesize();
+}
+long qemu_maxrampagesize(void)
{
return getpagesize();
}
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index edc5ed0e0c4e..9b1c10baa6c5 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -347,7 +347,7 @@ static void cap_hpt_maxpagesize_apply(SpaprMachineState *spapr,
warn_report("Many guests require at least 64kiB hpt-max-page-size");
}
- spapr_check_pagesize(spapr, qemu_getrampagesize(), errp);
+ spapr_check_pagesize(spapr, qemu_minrampagesize(), errp);
}
static bool spapr_pagesize_cb(void *opaque, uint32_t seg_pshift,
@@ -609,7 +609,7 @@ static SpaprCapabilities default_caps_with_cpu(SpaprMachineState *spapr,
uint8_t mps;
if (kvmppc_hpt_needs_host_contiguous_pages()) {
- mps = ctz64(qemu_getrampagesize());
+ mps = ctz64(qemu_minrampagesize());
} else {
mps = 34; /* allow everything up to 16GiB, i.e. everything */
}
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 3be567965736..7e256d3d31b8 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -188,7 +188,7 @@ static void s390_memory_init(ram_addr_t mem_size)
* Configure the maximum page size. As no memory devices were created
* yet, this is the page size of initial memory only.
*/
- s390_set_max_pagesize(qemu_getrampagesize(), &local_err);
+ s390_set_max_pagesize(qemu_maxrampagesize(), &local_err);
if (local_err) {
error_report_err(local_err);
exit(EXIT_FAILURE);
diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c
index 57fe758e5441..96c0ad9d9b7e 100644
--- a/hw/vfio/spapr.c
+++ b/hw/vfio/spapr.c
@@ -148,7 +148,7 @@ int vfio_spapr_create_window(VFIOContainer *container,
uint64_t pagesize = memory_region_iommu_get_min_page_size(iommu_mr);
unsigned entries, bits_total, bits_per_level, max_levels;
struct vfio_iommu_spapr_tce_create create = { .argsz = sizeof(create) };
- long rampagesize = qemu_getrampagesize();
+ long rampagesize = qemu_minrampagesize();
/*
* The host might not support the guest supported IOMMU page size,
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index 9ecd911c3e78..139ad79390fa 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -73,7 +73,8 @@ static inline unsigned long int ramblock_recv_bitmap_offset(void *host_addr,
bool ramblock_is_pmem(RAMBlock *rb);
-long qemu_getrampagesize(void);
+long qemu_minrampagesize(void);
+long qemu_maxrampagesize(void);
/**
* qemu_ram_alloc_from_file,
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 2427c8ee13ae..59d92c42751e 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2136,7 +2136,7 @@ uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift)
/* Find the largest hardware supported page size that's less than
* or equal to the (logical) backing page size of guest RAM */
kvm_get_smmu_info(&info, &error_fatal);
- rampagesize = qemu_getrampagesize();
+ rampagesize = qemu_minrampagesize();
best_page_shift = 0;
for (i = 0; i < KVM_PPC_PAGE_SIZES_MAX_SZ; i++) {
--
2.17.2
^ permalink raw reply related [flat|nested] 47+ messages in thread
* Re: [Qemu-devel] [PULL 00/19] first batch of s390x patches for 4.1
2019-04-25 13:21 ` Cornelia Huck
` (19 preceding siblings ...)
(?)
@ 2019-04-26 13:29 ` Peter Maydell
-1 siblings, 0 replies; 47+ messages in thread
From: Peter Maydell @ 2019-04-26 13:29 UTC (permalink / raw)
To: Cornelia Huck; +Cc: qemu-s390x, QEMU Developers
On Thu, 25 Apr 2019 at 14:21, Cornelia Huck <cohuck@redhat.com> wrote:
>
> The following changes since commit 3284aa128153750f14a61e8a96fd085e6f2999b6:
>
> Merge remote-tracking branch 'remotes/lersek/tags/edk2-pull-2019-04-22' into staging (2019-04-24 13:19:41 +0100)
>
> are available in the Git repository at:
>
> https://github.com/cohuck/qemu tags/s390x-20190425
>
> for you to fetch changes up to 41c3d4269b1c18d12d33c5bf089dace25d08e82e:
>
> Merge tag 's390-ccw-bios-2019-04-12' into s390-next-staging (2019-04-25 14:09:20 +0200)
>
> ----------------------------------------------------------------
> - properly detect page size of initial memory
> - support for IPL (boot) from ECKD DASD passed through via vfio-ccw
>
> ----------------------------------------------------------------
>
Applied, thanks.
Please update the changelog at https://wiki.qemu.org/ChangeLog/4.1
for any user-visible changes.
-- PMM
^ permalink raw reply [flat|nested] 47+ messages in thread
* Re: [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-04-30 16:54 ` Peter Maydell
0 siblings, 0 replies; 47+ messages in thread
From: Peter Maydell @ 2019-04-30 16:54 UTC (permalink / raw)
To: Cornelia Huck; +Cc: qemu-s390x, QEMU Developers, Jason J. Herne, Thomas Huth
On Thu, 25 Apr 2019 at 14:21, Cornelia Huck <cohuck@redhat.com> wrote:
>
> From: "Jason J. Herne" <jjherne@linux.ibm.com>
>
> Add bootindex property and iplb data for vfio-ccw devices. This allows us to
> forward boot information into the bios for vfio-ccw devices.
>
> Refactor s390_get_ccw_device() to return device type. This prevents us from
> having to use messy casting logic in several places.
>
> Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
> Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> Message-Id: <1554388475-18329-2-git-send-email-jjherne@linux.ibm.com>
> [thuth: fixed "typedef struct VFIOCCWDevice" build failure with clang]
> Signed-off-by: Thomas Huth <thuth@redhat.com>
Hi; Coverity has a complaint (CID 1401098) about the use of
object_dynamic_cast() in this function. It looks like it's just
the result of code motion making it forget we'd dismissed the
warning before, but maybe we can avoid it entirely...
> @@ -335,20 +360,22 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
> {
> DeviceState *dev_st;
> CcwDevice *ccw_dev = NULL;
> + SCSIDevice *sd;
> + int devtype;
>
> dev_st = get_boot_device(0);
> if (dev_st) {
> - ccw_dev = s390_get_ccw_device(dev_st);
> + ccw_dev = s390_get_ccw_device(dev_st, &devtype);
> }
>
> /*
> * Currently allow IPL only from CCW devices.
> */
> if (ccw_dev) {
> - SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> - TYPE_SCSI_DEVICE);
> -
> - if (sd) {
> + switch (devtype) {
> + case CCW_DEVTYPE_SCSI:
> + sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> + TYPE_SCSI_DEVICE);
Coverity doesn't like the use of object_dynamic_cast() without a
check that the return value isn't NULL before we dereference
it a few lines further down.
I think that if we know this cast must always succeed, we
could instead just write
SCSIDevice *sd = SCSI_DEVICE(dev_st);
On the other hand if the cast might not succeed because dev_st
isn't necessarily of the right type, then we should check it
for NULL and handle that appropriately.
thanks
-- PMM
^ permalink raw reply [flat|nested] 47+ messages in thread
* Re: [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-04-30 16:54 ` Peter Maydell
0 siblings, 0 replies; 47+ messages in thread
From: Peter Maydell @ 2019-04-30 16:54 UTC (permalink / raw)
To: Cornelia Huck; +Cc: Jason J. Herne, qemu-s390x, QEMU Developers, Thomas Huth
On Thu, 25 Apr 2019 at 14:21, Cornelia Huck <cohuck@redhat.com> wrote:
>
> From: "Jason J. Herne" <jjherne@linux.ibm.com>
>
> Add bootindex property and iplb data for vfio-ccw devices. This allows us to
> forward boot information into the bios for vfio-ccw devices.
>
> Refactor s390_get_ccw_device() to return device type. This prevents us from
> having to use messy casting logic in several places.
>
> Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
> Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> Message-Id: <1554388475-18329-2-git-send-email-jjherne@linux.ibm.com>
> [thuth: fixed "typedef struct VFIOCCWDevice" build failure with clang]
> Signed-off-by: Thomas Huth <thuth@redhat.com>
Hi; Coverity has a complaint (CID 1401098) about the use of
object_dynamic_cast() in this function. It looks like it's just
the result of code motion making it forget we'd dismissed the
warning before, but maybe we can avoid it entirely...
> @@ -335,20 +360,22 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
> {
> DeviceState *dev_st;
> CcwDevice *ccw_dev = NULL;
> + SCSIDevice *sd;
> + int devtype;
>
> dev_st = get_boot_device(0);
> if (dev_st) {
> - ccw_dev = s390_get_ccw_device(dev_st);
> + ccw_dev = s390_get_ccw_device(dev_st, &devtype);
> }
>
> /*
> * Currently allow IPL only from CCW devices.
> */
> if (ccw_dev) {
> - SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> - TYPE_SCSI_DEVICE);
> -
> - if (sd) {
> + switch (devtype) {
> + case CCW_DEVTYPE_SCSI:
> + sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> + TYPE_SCSI_DEVICE);
Coverity doesn't like the use of object_dynamic_cast() without a
check that the return value isn't NULL before we dereference
it a few lines further down.
I think that if we know this cast must always succeed, we
could instead just write
SCSIDevice *sd = SCSI_DEVICE(dev_st);
On the other hand if the cast might not succeed because dev_st
isn't necessarily of the right type, then we should check it
for NULL and handle that appropriately.
thanks
-- PMM
^ permalink raw reply [flat|nested] 47+ messages in thread
* Re: [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-04-30 20:30 ` Eduardo Habkost
0 siblings, 0 replies; 47+ messages in thread
From: Eduardo Habkost @ 2019-04-30 20:30 UTC (permalink / raw)
To: Peter Maydell
Cc: Cornelia Huck, Jason J. Herne, qemu-s390x, QEMU Developers,
Thomas Huth
On Tue, Apr 30, 2019 at 05:54:49PM +0100, Peter Maydell wrote:
> On Thu, 25 Apr 2019 at 14:21, Cornelia Huck <cohuck@redhat.com> wrote:
[...]
> > - SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > - TYPE_SCSI_DEVICE);
> > -
> > - if (sd) {
> > + switch (devtype) {
> > + case CCW_DEVTYPE_SCSI:
> > + sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > + TYPE_SCSI_DEVICE);
>
> Coverity doesn't like the use of object_dynamic_cast() without a
> check that the return value isn't NULL before we dereference
> it a few lines further down.
>
> I think that if we know this cast must always succeed, we
> could instead just write
> SCSIDevice *sd = SCSI_DEVICE(dev_st);
>
> On the other hand if the cast might not succeed because dev_st
> isn't necessarily of the right type, then we should check it
> for NULL and handle that appropriately.
s390_get_ccw_device() will set devtype=CCW_DEVTYPE_SCSI only if
dev_st is TYPE_SCSI_DEVICE, so the cast must always succeed and
we should use SCSI_DEVICE(dev_st) here.
--
Eduardo
^ permalink raw reply [flat|nested] 47+ messages in thread
* Re: [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-04-30 20:30 ` Eduardo Habkost
0 siblings, 0 replies; 47+ messages in thread
From: Eduardo Habkost @ 2019-04-30 20:30 UTC (permalink / raw)
To: Peter Maydell
Cc: Jason J. Herne, qemu-s390x, Cornelia Huck, QEMU Developers,
Thomas Huth
On Tue, Apr 30, 2019 at 05:54:49PM +0100, Peter Maydell wrote:
> On Thu, 25 Apr 2019 at 14:21, Cornelia Huck <cohuck@redhat.com> wrote:
[...]
> > - SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > - TYPE_SCSI_DEVICE);
> > -
> > - if (sd) {
> > + switch (devtype) {
> > + case CCW_DEVTYPE_SCSI:
> > + sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > + TYPE_SCSI_DEVICE);
>
> Coverity doesn't like the use of object_dynamic_cast() without a
> check that the return value isn't NULL before we dereference
> it a few lines further down.
>
> I think that if we know this cast must always succeed, we
> could instead just write
> SCSIDevice *sd = SCSI_DEVICE(dev_st);
>
> On the other hand if the cast might not succeed because dev_st
> isn't necessarily of the right type, then we should check it
> for NULL and handle that appropriately.
s390_get_ccw_device() will set devtype=CCW_DEVTYPE_SCSI only if
dev_st is TYPE_SCSI_DEVICE, so the cast must always succeed and
we should use SCSI_DEVICE(dev_st) here.
--
Eduardo
^ permalink raw reply [flat|nested] 47+ messages in thread
* Re: [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-05-02 15:48 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-05-02 15:48 UTC (permalink / raw)
To: Eduardo Habkost
Cc: Peter Maydell, Jason J. Herne, qemu-s390x, QEMU Developers,
Thomas Huth
On Tue, 30 Apr 2019 17:30:09 -0300
Eduardo Habkost <ehabkost@redhat.com> wrote:
> On Tue, Apr 30, 2019 at 05:54:49PM +0100, Peter Maydell wrote:
> > On Thu, 25 Apr 2019 at 14:21, Cornelia Huck <cohuck@redhat.com> wrote:
> [...]
> > > - SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > > - TYPE_SCSI_DEVICE);
> > > -
> > > - if (sd) {
> > > + switch (devtype) {
> > > + case CCW_DEVTYPE_SCSI:
> > > + sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > > + TYPE_SCSI_DEVICE);
> >
> > Coverity doesn't like the use of object_dynamic_cast() without a
> > check that the return value isn't NULL before we dereference
> > it a few lines further down.
> >
> > I think that if we know this cast must always succeed, we
> > could instead just write
> > SCSIDevice *sd = SCSI_DEVICE(dev_st);
> >
> > On the other hand if the cast might not succeed because dev_st
> > isn't necessarily of the right type, then we should check it
> > for NULL and handle that appropriately.
>
> s390_get_ccw_device() will set devtype=CCW_DEVTYPE_SCSI only if
> dev_st is TYPE_SCSI_DEVICE, so the cast must always succeed and
> we should use SCSI_DEVICE(dev_st) here.
>
Yes; sending a patch.
^ permalink raw reply [flat|nested] 47+ messages in thread
* Re: [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data
@ 2019-05-02 15:48 ` Cornelia Huck
0 siblings, 0 replies; 47+ messages in thread
From: Cornelia Huck @ 2019-05-02 15:48 UTC (permalink / raw)
To: Eduardo Habkost
Cc: Jason J. Herne, Peter Maydell, qemu-s390x, QEMU Developers,
Thomas Huth
On Tue, 30 Apr 2019 17:30:09 -0300
Eduardo Habkost <ehabkost@redhat.com> wrote:
> On Tue, Apr 30, 2019 at 05:54:49PM +0100, Peter Maydell wrote:
> > On Thu, 25 Apr 2019 at 14:21, Cornelia Huck <cohuck@redhat.com> wrote:
> [...]
> > > - SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > > - TYPE_SCSI_DEVICE);
> > > -
> > > - if (sd) {
> > > + switch (devtype) {
> > > + case CCW_DEVTYPE_SCSI:
> > > + sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
> > > + TYPE_SCSI_DEVICE);
> >
> > Coverity doesn't like the use of object_dynamic_cast() without a
> > check that the return value isn't NULL before we dereference
> > it a few lines further down.
> >
> > I think that if we know this cast must always succeed, we
> > could instead just write
> > SCSIDevice *sd = SCSI_DEVICE(dev_st);
> >
> > On the other hand if the cast might not succeed because dev_st
> > isn't necessarily of the right type, then we should check it
> > for NULL and handle that appropriately.
>
> s390_get_ccw_device() will set devtype=CCW_DEVTYPE_SCSI only if
> dev_st is TYPE_SCSI_DEVICE, so the cast must always succeed and
> we should use SCSI_DEVICE(dev_st) here.
>
Yes; sending a patch.
^ permalink raw reply [flat|nested] 47+ messages in thread
end of thread, other threads:[~2019-05-02 15:51 UTC | newest]
Thread overview: 47+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-04-25 13:21 [Qemu-devel] [PULL 00/19] first batch of s390x patches for 4.1 Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 01/19] s390 vfio-ccw: Add bootindex property and IPLB data Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-30 16:54 ` Peter Maydell
2019-04-30 16:54 ` Peter Maydell
2019-04-30 20:30 ` Eduardo Habkost
2019-04-30 20:30 ` Eduardo Habkost
2019-05-02 15:48 ` Cornelia Huck
2019-05-02 15:48 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 02/19] s390-bios: decouple cio setup from virtio Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 03/19] s390-bios: decouple common boot logic " Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 04/19] s390-bios: Clean up cio.h Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 05/19] s390-bios: Decouple channel i/o logic from virtio Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 06/19] s390-bios: Map low core memory Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 07/19] s390-bios: ptr2u32 and u32toptr Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 08/19] s390-bios: Support for running format-0/1 channel programs Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 09/19] s390-bios: cio error handling Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 10/19] s390-bios: Extend find_dev() for non-virtio devices Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 11/19] s390-bios: Factor finding boot device out of virtio code path Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 12/19] s390-bios: Refactor virtio to run channel programs via cio Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 13/19] s390-bios: Use control unit type to determine boot method Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 14/19] s390-bios: Add channel command codes/structs needed for dasd-ipl Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 15/19] s390-bios: Support booting from real dasd device Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 16/19] s390-bios: Use control unit type to find bootable devices Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 17/19] pc-bios/s390: Update firmware images Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 18/19] s390x/kvm: Configure page size after memory has actually been initialized Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-25 13:21 ` [Qemu-devel] [PULL 19/19] exec: Introduce qemu_maxrampagesize() and rename qemu_getrampagesize() Cornelia Huck
2019-04-25 13:21 ` Cornelia Huck
2019-04-26 13:29 ` [Qemu-devel] [PULL 00/19] first batch of s390x patches for 4.1 Peter Maydell
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