[Qemu-devel] [PATCH 0/3] Virtio PCI libqos driver

[Qemu-devel] [PATCH 0/3] Virtio PCI libqos driver

[Marc Marí]

Add first functions for virtio PCI libqos driver in two steps. Add more
debugging tools.

Marc Marí (3):
  tests: Functions bus_foreach and device_find from libqos virtio API
  tests: Add virtio device initialization
  libqtest: add QTEST_LOG for debugging qtest testcases

 tests/Makefile            |    3 +-
 tests/libqos/virtio-pci.c |  114 +++++++++++++++++++++++++++++++++++++++++++++
 tests/libqos/virtio-pci.h |   41 ++++++++++++++++
 tests/libqos/virtio.c     |   31 ++++++++++++
 tests/libqos/virtio.h     |   42 +++++++++++++++++
 tests/libqtest.c          |   11 ++++-
 tests/virtio-blk-test.c   |   81 ++++++++++++++++++++++++++++----
 7 files changed, 313 insertions(+), 10 deletions(-)
 create mode 100644 tests/libqos/virtio-pci.c
 create mode 100644 tests/libqos/virtio-pci.h
 create mode 100644 tests/libqos/virtio.c
 create mode 100644 tests/libqos/virtio.h

-- 
1.7.10.4

[Qemu-devel] [PATCH 1/3] tests: Functions bus_foreach and device_find from libqos virtio API

[Marc Marí]

Virtio header has been changed to compile and work with a real device.
Functions bus_foreach and device_find have been implemented for PCI.
Virtio-blk test case now opens a fake device.

Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
---
 tests/Makefile            |    3 +-
 tests/libqos/virtio-pci.c |   82 +++++++++++++++++++++++++++++++++++++++++++++
 tests/libqos/virtio-pci.h |   24 +++++++++++++
 tests/libqos/virtio.h     |   23 +++++++++++++
 tests/virtio-blk-test.c   |   67 +++++++++++++++++++++++++++++++-----
 5 files changed, 190 insertions(+), 9 deletions(-)
 create mode 100644 tests/libqos/virtio-pci.c
 create mode 100644 tests/libqos/virtio-pci.h
 create mode 100644 tests/libqos/virtio.h

diff --git a/tests/Makefile b/tests/Makefile
index 1fcd633..c40a75d 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -292,6 +292,7 @@ libqos-obj-y += tests/libqos/i2c.o
 libqos-pc-obj-y = $(libqos-obj-y) tests/libqos/pci-pc.o
 libqos-pc-obj-y += tests/libqos/malloc-pc.o
 libqos-omap-obj-y = $(libqos-obj-y) tests/libqos/i2c-omap.o
+libqos-virtio-obj-y = $(libqos-obj-y) $(libqos-pc-obj-y) tests/libqos/virtio-pci.o
 
 tests/rtc-test$(EXESUF): tests/rtc-test.o
 tests/m48t59-test$(EXESUF): tests/m48t59-test.o
@@ -312,7 +313,7 @@ tests/eepro100-test$(EXESUF): tests/eepro100-test.o
 tests/vmxnet3-test$(EXESUF): tests/vmxnet3-test.o
 tests/ne2000-test$(EXESUF): tests/ne2000-test.o
 tests/virtio-balloon-test$(EXESUF): tests/virtio-balloon-test.o
-tests/virtio-blk-test$(EXESUF): tests/virtio-blk-test.o
+tests/virtio-blk-test$(EXESUF): tests/virtio-blk-test.o $(libqos-virtio-obj-y)
 tests/virtio-net-test$(EXESUF): tests/virtio-net-test.o
 tests/virtio-rng-test$(EXESUF): tests/virtio-rng-test.o
 tests/virtio-scsi-test$(EXESUF): tests/virtio-scsi-test.o
diff --git a/tests/libqos/virtio-pci.c b/tests/libqos/virtio-pci.c
new file mode 100644
index 0000000..2bd1006
--- /dev/null
+++ b/tests/libqos/virtio-pci.c
@@ -0,0 +1,82 @@
+/*
+ * libqos virtio PCI driver
+ *
+ * Copyright (c) 2014 Marc Marí
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <glib.h>
+#include "libqtest.h"
+#include "libqos/virtio.h"
+#include "libqos/virtio-pci.h"
+#include "libqos/pci.h"
+#include "libqos/pci-pc.h"
+
+#include "hw/pci/pci_regs.h"
+
+typedef struct QVirtioPCIForeachData {
+    void (*func)(QVirtioDevice *d, void *data);
+    uint16_t device_type;
+    void *user_data;
+} QVirtioPCIForeachData;
+
+static QVirtioPCIDevice *qpcidevice_to_qvirtiodevice(QPCIDevice *pdev)
+{
+    QVirtioPCIDevice *vpcidev;
+    vpcidev = g_malloc0(sizeof(*vpcidev));
+
+    if (pdev) {
+        vpcidev->pdev = pdev;
+        vpcidev->vdev.device_type =
+                            qpci_config_readw(vpcidev->pdev, PCI_SUBSYSTEM_ID);
+    }
+
+    return vpcidev;
+}
+
+static void qvirtio_pci_foreach_callback(
+                        QPCIDevice *dev, int devfn, void *data)
+{
+    QVirtioPCIForeachData *d = data;
+    QVirtioPCIDevice *vpcidev = qpcidevice_to_qvirtiodevice(dev);
+
+    if (vpcidev->vdev.device_type == d->device_type) {
+        d->func(&vpcidev->vdev, d->user_data);
+    }
+
+    g_free(vpcidev);
+}
+
+static void qvirtio_pci_assign_device(QVirtioDevice *d, void *data)
+{
+    QVirtioPCIDevice *vpcidev = data;
+    vpcidev->pdev               = ((QVirtioPCIDevice *)d)->pdev;
+    vpcidev->vdev.device_type   = ((QVirtioPCIDevice *)d)->vdev.device_type;
+}
+
+void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
+                void (*func)(QVirtioDevice *d, void *data), void *data)
+{
+    QVirtioPCIForeachData d = { .func = func,
+                                .device_type = device_type,
+                                .user_data = data };
+
+    qpci_device_foreach(bus, QVIRTIO_VENDOR_ID, -1,
+                                qvirtio_pci_foreach_callback, &d);
+}
+
+QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type)
+{
+    QVirtioPCIDevice *dev;
+
+    dev = g_malloc0(sizeof(*dev));
+    qvirtio_pci_foreach(bus, device_type, qvirtio_pci_assign_device, dev);
+
+    if (dev->pdev == NULL) {
+        return NULL;
+    } else {
+        return dev;
+    }
+}
diff --git a/tests/libqos/virtio-pci.h b/tests/libqos/virtio-pci.h
new file mode 100644
index 0000000..5101abb
--- /dev/null
+++ b/tests/libqos/virtio-pci.h
@@ -0,0 +1,24 @@
+/*
+ * libqos virtio PCI definitions
+ *
+ * Copyright (c) 2014 Marc Marí
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef LIBQOS_VIRTIO_PCI_H
+#define LIBQOS_VIRTIO_PCI_H
+
+#include "libqos/virtio.h"
+#include "libqos/pci.h"
+
+typedef struct QVirtioPCIDevice {
+    QVirtioDevice vdev;
+    QPCIDevice *pdev;
+} QVirtioPCIDevice;
+
+void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
+                void (*func)(QVirtioDevice *d, void *data), void *data);
+QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type);
+#endif
diff --git a/tests/libqos/virtio.h b/tests/libqos/virtio.h
new file mode 100644
index 0000000..2a05798
--- /dev/null
+++ b/tests/libqos/virtio.h
@@ -0,0 +1,23 @@
+/*
+ * libqos virtio definitions
+ *
+ * Copyright (c) 2014 Marc Marí
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef LIBQOS_VIRTIO_H
+#define LIBQOS_VIRTIO_H
+
+#define QVIRTIO_VENDOR_ID       0x1AF4
+
+#define QVIRTIO_NET_DEVICE_ID   0x1
+#define QVIRTIO_BLK_DEVICE_ID   0x2
+
+typedef struct QVirtioDevice {
+    /* Device type */
+    uint16_t device_type;
+} QVirtioDevice;
+
+#endif
diff --git a/tests/virtio-blk-test.c b/tests/virtio-blk-test.c
index d53f875..52894f4 100644
--- a/tests/virtio-blk-test.c
+++ b/tests/virtio-blk-test.c
@@ -2,6 +2,7 @@
  * QTest testcase for VirtIO Block Device
  *
  * Copyright (c) 2014 SUSE LINUX Products GmbH
+ * Copyright (c) 2014 Marc Marí
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
@@ -9,12 +10,65 @@
 
 #include <glib.h>
 #include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
 #include "libqtest.h"
-#include "qemu/osdep.h"
+#include "libqos/virtio.h"
+#include "libqos/virtio-pci.h"
+#include "libqos/pci-pc.h"
 
-/* Tests only initialization so far. TODO: Replace with functional tests */
-static void pci_nop(void)
+#define TEST_IMAGE_SIZE (64 * 1024 * 1024)
+#define PCI_SLOT    0x04
+#define PCI_FN      0x00
+
+static char *last_tmp_path;
+
+static QPCIBus *test_start(void)
+{
+    char cmdline[100];
+    char tmp_path[] = "/tmp/qtest.XXXXXX";
+    int fd, ret;
+
+    /* Create a temporary raw image */
+    fd = mkstemp(tmp_path);
+    g_assert_cmpint(fd, >=, 0);
+    ret = ftruncate(fd, TEST_IMAGE_SIZE);
+    g_assert_cmpint(ret, ==, 0);
+    close(fd);
+
+    last_tmp_path = g_malloc0(strlen(tmp_path));
+    strcpy(last_tmp_path, tmp_path);
+
+    snprintf(cmdline, 100, "-drive if=none,id=drive0,file=%s "
+                            "-device virtio-blk-pci,drive=drive0,addr=%x.%x",
+                            tmp_path, PCI_SLOT, PCI_FN);
+    qtest_start(cmdline);
+
+    return qpci_init_pc();
+}
+
+static void test_end(void)
 {
+    qtest_end();
+    unlink(last_tmp_path);
+    g_free(last_tmp_path);
+}
+
+static void pci_basic(void)
+{
+    QVirtioPCIDevice *dev;
+    QPCIBus *bus;
+
+    bus = test_start();
+
+    dev = qvirtio_pci_device_find(bus, QVIRTIO_BLK_DEVICE_ID);
+    g_assert(dev != NULL);
+    g_assert_cmphex(dev->vdev.device_type, ==, QVIRTIO_BLK_DEVICE_ID);
+    g_assert_cmphex(dev->pdev->devfn, ==, ((PCI_SLOT << 3) | PCI_FN));
+
+    g_free(dev);
+    test_end();
 }
 
 int main(int argc, char **argv)
@@ -22,13 +76,10 @@ int main(int argc, char **argv)
     int ret;
 
     g_test_init(&argc, &argv, NULL);
-    qtest_add_func("/virtio/blk/pci/nop", pci_nop);
 
-    qtest_start("-drive id=drv0,if=none,file=/dev/null "
-                "-device virtio-blk-pci,drive=drv0");
-    ret = g_test_run();
+    g_test_add_func("/virtio/blk/pci/basic", pci_basic);
 
-    qtest_end();
+    ret = g_test_run();
 
     return ret;
 }
-- 
1.7.10.4

[Qemu-devel] [PATCH 2/3] tests: Add virtio device initialization

[Marc Marí]

Add functions to read and write virtio header fields.
Add feature checking and status bit setting in virtio-blk-device.

Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
---
 tests/Makefile            |    2 +-
 tests/libqos/virtio-pci.c |   32 ++++++++++++++++++++++++++++++++
 tests/libqos/virtio-pci.h |   17 +++++++++++++++++
 tests/libqos/virtio.c     |   31 +++++++++++++++++++++++++++++++
 tests/libqos/virtio.h     |   19 +++++++++++++++++++
 tests/virtio-blk-test.c   |   14 ++++++++++++++
 6 files changed, 114 insertions(+), 1 deletion(-)
 create mode 100644 tests/libqos/virtio.c

diff --git a/tests/Makefile b/tests/Makefile
index c40a75d..bdb7d0a 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -292,7 +292,7 @@ libqos-obj-y += tests/libqos/i2c.o
 libqos-pc-obj-y = $(libqos-obj-y) tests/libqos/pci-pc.o
 libqos-pc-obj-y += tests/libqos/malloc-pc.o
 libqos-omap-obj-y = $(libqos-obj-y) tests/libqos/i2c-omap.o
-libqos-virtio-obj-y = $(libqos-obj-y) $(libqos-pc-obj-y) tests/libqos/virtio-pci.o
+libqos-virtio-obj-y = $(libqos-obj-y) $(libqos-pc-obj-y) tests/libqos/virtio.o tests/libqos/virtio-pci.o
 
 tests/rtc-test$(EXESUF): tests/rtc-test.o
 tests/m48t59-test$(EXESUF): tests/m48t59-test.o
diff --git a/tests/libqos/virtio-pci.c b/tests/libqos/virtio-pci.c
index 2bd1006..a514a7a 100644
--- a/tests/libqos/virtio-pci.c
+++ b/tests/libqos/virtio-pci.c
@@ -56,6 +56,30 @@ static void qvirtio_pci_assign_device(QVirtioDevice *d, void *data)
     vpcidev->vdev.device_type   = ((QVirtioPCIDevice *)d)->vdev.device_type;
 }
 
+static uint32_t qvirtio_pci_get_features(QVirtioDevice *d)
+{
+    QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
+    return qpci_io_readl(dev->pdev, dev->addr + QVIRTIO_DEVICE_FEATURES);
+}
+
+static uint8_t qvirtio_pci_get_status(QVirtioDevice *d)
+{
+    QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
+    return qpci_io_readb(dev->pdev, dev->addr + QVIRTIO_DEVICE_STATUS);
+}
+
+static void qvirtio_pci_set_status(QVirtioDevice *d, uint8_t val)
+{
+    QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
+    qpci_io_writeb(dev->pdev, dev->addr + QVIRTIO_DEVICE_STATUS, val);
+}
+
+const QVirtioBus qvirtio_pci = {
+    .get_features = qvirtio_pci_get_features,
+    .get_status = qvirtio_pci_get_status,
+    .set_status = qvirtio_pci_set_status,
+};
+
 void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
                 void (*func)(QVirtioDevice *d, void *data), void *data)
 {
@@ -80,3 +104,11 @@ QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type)
         return dev;
     }
 }
+
+void qvirtio_pci_enable_device(QVirtioPCIDevice *d)
+{
+    qpci_device_enable(d->pdev);
+    d->addr = qpci_iomap(d->pdev, 0);
+    g_assert(d->addr != NULL);
+}
+
diff --git a/tests/libqos/virtio-pci.h b/tests/libqos/virtio-pci.h
index 5101abb..ef7744e 100644
--- a/tests/libqos/virtio-pci.h
+++ b/tests/libqos/virtio-pci.h
@@ -13,12 +13,29 @@
 #include "libqos/virtio.h"
 #include "libqos/pci.h"
 
+#define QVIRTIO_DEVICE_FEATURES         0x00
+#define QVIRTIO_GUEST_FEATURES          0x04
+#define QVIRTIO_QUEUE_ADDRESS           0x08
+#define QVIRTIO_QUEUE_SIZE              0x0C
+#define QVIRTIO_QUEUE_SELECT            0x0E
+#define QVIRTIO_QUEUE_NOTIFY            0x10
+#define QVIRTIO_DEVICE_STATUS           0x12
+#define QVIRTIO_ISR_STATUS              0x13
+#define QVIRTIO_MSIX_CONF_VECTOR        0x14
+#define QVIRTIO_MSIX_QUEUE_VECTOR       0x16
+#define QVIRTIO_DEVICE_SPECIFIC_MSIX    0x18
+#define QVIRTIO_DEVICE_SPECIFIC_NO_MSIX 0x14
+
 typedef struct QVirtioPCIDevice {
     QVirtioDevice vdev;
     QPCIDevice *pdev;
+    void *addr;
 } QVirtioPCIDevice;
 
+extern const QVirtioBus qvirtio_pci;
+
 void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type,
                 void (*func)(QVirtioDevice *d, void *data), void *data);
 QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type);
+void qvirtio_pci_enable_device(QVirtioPCIDevice *d);
 #endif
diff --git a/tests/libqos/virtio.c b/tests/libqos/virtio.c
new file mode 100644
index 0000000..118cb15
--- /dev/null
+++ b/tests/libqos/virtio.c
@@ -0,0 +1,31 @@
+/*
+ * libqos virtio driver
+ *
+ * Copyright (c) 2014 Marc Marí
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <glib.h>
+#include "libqtest.h"
+#include "libqos/virtio.h"
+
+void qvirtio_reset(const QVirtioBus *bus, QVirtioDevice *d)
+{
+    bus->set_status(d, QVIRTIO_RESET);
+    g_assert_cmphex(bus->get_status(d), ==, QVIRTIO_RESET);
+}
+
+void qvirtio_set_acknowledge(const QVirtioBus *bus, QVirtioDevice *d)
+{
+    bus->set_status(d, bus->get_status(d) | QVIRTIO_ACKNOWLEDGE);
+    g_assert_cmphex(bus->get_status(d), ==, QVIRTIO_ACKNOWLEDGE);
+}
+
+void qvirtio_set_driver(const QVirtioBus *bus, QVirtioDevice *d)
+{
+    bus->set_status(d, bus->get_status(d) | QVIRTIO_DRIVER);
+    g_assert_cmphex(bus->get_status(d), ==,
+                                    QVIRTIO_DRIVER | QVIRTIO_ACKNOWLEDGE);
+}
diff --git a/tests/libqos/virtio.h b/tests/libqos/virtio.h
index 2a05798..a2e3219 100644
--- a/tests/libqos/virtio.h
+++ b/tests/libqos/virtio.h
@@ -12,6 +12,10 @@
 
 #define QVIRTIO_VENDOR_ID       0x1AF4
 
+#define QVIRTIO_RESET           0x0
+#define QVIRTIO_ACKNOWLEDGE     0x1
+#define QVIRTIO_DRIVER          0x2
+
 #define QVIRTIO_NET_DEVICE_ID   0x1
 #define QVIRTIO_BLK_DEVICE_ID   0x2
 
@@ -20,4 +24,19 @@ typedef struct QVirtioDevice {
     uint16_t device_type;
 } QVirtioDevice;
 
+typedef struct QVirtioBus {
+    /* Get features of the device */
+    uint32_t (*get_features)(QVirtioDevice *d);
+
+    /* Get status of the device */
+    uint8_t (*get_status)(QVirtioDevice *d);
+
+    /* Set status of the device  */
+    void (*set_status)(QVirtioDevice *d, uint8_t val);
+} QVirtioBus;
+
+void qvirtio_reset(const QVirtioBus *bus, QVirtioDevice *d);
+void qvirtio_set_acknowledge(const QVirtioBus *bus, QVirtioDevice *d);
+void qvirtio_set_driver(const QVirtioBus *bus, QVirtioDevice *d);
+
 #endif
diff --git a/tests/virtio-blk-test.c b/tests/virtio-blk-test.c
index 52894f4..83be520 100644
--- a/tests/virtio-blk-test.c
+++ b/tests/virtio-blk-test.c
@@ -59,6 +59,8 @@ static void pci_basic(void)
 {
     QVirtioPCIDevice *dev;
     QPCIBus *bus;
+    void *addr;
+    uint64_t capacity;
 
     bus = test_start();
 
@@ -67,6 +69,18 @@ static void pci_basic(void)
     g_assert_cmphex(dev->vdev.device_type, ==, QVIRTIO_BLK_DEVICE_ID);
     g_assert_cmphex(dev->pdev->devfn, ==, ((PCI_SLOT << 3) | PCI_FN));
 
+    qvirtio_pci_enable_device(dev);
+    qvirtio_reset(&qvirtio_pci, &dev->vdev);
+    qvirtio_set_acknowledge(&qvirtio_pci, &dev->vdev);
+    qvirtio_set_driver(&qvirtio_pci, &dev->vdev);
+
+    /* MSI-X is not enabled */
+    addr = dev->addr + QVIRTIO_DEVICE_SPECIFIC_NO_MSIX;
+
+    capacity = qpci_io_readl(dev->pdev, addr) |
+                qpci_io_readl(dev->pdev, addr+4);
+    g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE/512);
+
     g_free(dev);
     test_end();
 }
-- 
1.7.10.4

[Qemu-devel] [PATCH 3/3] libqtest: add QTEST_LOG for debugging qtest testcases

[Marc Marí]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
---
 tests/libqtest.c |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tests/libqtest.c b/tests/libqtest.c
index 98e8f4b..056275d 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -167,11 +167,12 @@ QTestState *qtest_init(const char *extra_args)
     if (s->qemu_pid == 0) {
         command = g_strdup_printf("exec %s "
                                   "-qtest unix:%s,nowait "
-                                  "-qtest-log /dev/null "
+                                  "-qtest-log %s "
                                   "-qmp unix:%s,nowait "
                                   "-machine accel=qtest "
                                   "-display none "
                                   "%s", qemu_binary, socket_path,
+                                  getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
                                   qmp_socket_path,
                                   extra_args ?: "");
         execlp("/bin/sh", "sh", "-c", command, NULL);
@@ -397,10 +398,18 @@ QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
 
     /* No need to send anything for an empty QObject.  */
     if (qobj) {
+        size_t len;
+        int log = getenv("QTEST_LOG") != NULL;
         QString *qstr = qobject_to_json(qobj);
         const char *str = qstring_get_str(qstr);
         size_t size = qstring_get_length(qstr);
 
+        if (log) {
+            len = write(2, str, size);
+            if (len != size) {
+                fprintf(stderr, "Could not log\n");
+            }
+        }
         /* Send QMP request */
         socket_send(s->qmp_fd, str, size);
 
-- 
1.7.10.4