Re: [Qemu-devel] [qemu-s390x] [PATCH 01/15] s390 vfio-ccw: Add bootindex property and IPLB data

[Thomas Huth <thuth@redhat.com>]

On 2019-01-29 14:29, Jason J. Herne wrote:
> Add bootindex property and iplb data for vfio-ccw devices. This allows us to
> forward boot information into the bios for vfio-ccw devices.
> 
> Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
> Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
> ---
>  hw/s390x/ipl.c              | 14 ++++++++++++++
>  hw/s390x/s390-ccw.c         |  9 +++++++++
>  hw/vfio/ccw.c               | 13 +------------
>  include/hw/s390x/s390-ccw.h |  1 +
>  include/hw/s390x/vfio-ccw.h | 38 ++++++++++++++++++++++++++++++++++++++
>  5 files changed, 63 insertions(+), 12 deletions(-)
>  create mode 100644 include/hw/s390x/vfio-ccw.h
> 
> diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
> index 21f64ad..a993f65 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"
> @@ -311,8 +312,12 @@ static CcwDevice *s390_get_ccw_device(DeviceState *dev_st)
>          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);
> +        } else if (vfio_ccw_dev) {
> +            ccw_dev = CCW_DEVICE(vfio_ccw_dev);
>          } else {
>              SCSIDevice *sd = (SCSIDevice *)
>                  object_dynamic_cast(OBJECT(dev_st),
> @@ -347,6 +352,8 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
>      if (ccw_dev) {
>          SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
>                                                              TYPE_SCSI_DEVICE);
> +        VFIOCCWDevice *vc = (VFIOCCWDevice *)
> +            object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
>  
>          if (sd) {
>              ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
> @@ -358,6 +365,13 @@ 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 if (vc) {
> +            CcwDevice *ccw_dev = CCW_DEVICE(vc);
> +
> +            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;
>          } else {
>              VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
>                                                                TYPE_VIRTIO_NET);
> diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c
> index cad91ee..f5f025d 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 9246729..d815a4f 100644
> --- a/hw/vfio/ccw.c
> +++ b/hw/vfio/ccw.c
> @@ -21,22 +21,11 @@
>  #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 {
> -    S390CCWDevice cdev;
> -    VFIODevice vdev;
> -    uint64_t io_region_size;
> -    uint64_t io_region_offset;
> -    struct ccw_io_region *io_region;
> -    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 7d15a1a..901d805 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 0000000..a7d699d
> --- /dev/null
> +++ b/include/hw/s390x/vfio-ccw.h
> @@ -0,0 +1,38 @@
> +/*
> + * vfio based subchannel assignment support
> + *
> + * Copyright 2018 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)
> +
> +

Remove one empty line, please.

> +#define TYPE_VFIO_CCW "vfio-ccw"
> +typedef struct VFIOCCWDevice {
> +    S390CCWDevice cdev;
> +    VFIODevice vdev;
> +    uint64_t io_region_size;
> +    uint64_t io_region_offset;
> +    struct ccw_io_region *io_region;
> +    EventNotifier io_notifier;
> +    bool force_orb_pfch;
> +    bool warned_orb_pfch;
> +} VFIOCCWDevice;

Do you really need to make the whole structure public here? If not, I
think it would be sufficient to only have the "anonymous" typedef here:

typedef struct VFIOCCWDevice VFIOCCWDevice;

 Thomas