tests/virtio-blk-test.c - qemu - Git at Google

 /*
  * 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.
  */

 #include "qemu/osdep.h"
 #include "libqtest.h"
 #include "libqos/libqos-pc.h"
 #include "libqos/libqos-spapr.h"
 #include "libqos/virtio.h"
 #include "libqos/virtio-pci.h"
 #include "libqos/virtio-mmio.h"
 #include "libqos/malloc-generic.h"
 #include "qemu/bswap.h"
 #include "standard-headers/linux/virtio_ids.h"
 #include "standard-headers/linux/virtio_config.h"
 #include "standard-headers/linux/virtio_ring.h"
 #include "standard-headers/linux/virtio_blk.h"
 #include "standard-headers/linux/virtio_pci.h"

 #define TEST_IMAGE_SIZE         (64 * 1024 * 1024)
 #define QVIRTIO_BLK_TIMEOUT_US  (30 * 1000 * 1000)
 #define PCI_SLOT_HP             0x06
 #define PCI_SLOT                0x04
 #define PCI_FN                  0x00

 #define MMIO_PAGE_SIZE          4096
 #define MMIO_DEV_BASE_ADDR      0x0A003E00
 #define MMIO_RAM_ADDR           0x40000000
 #define MMIO_RAM_SIZE           0x20000000

 typedef struct QVirtioBlkReq {
     uint32_t type;
     uint32_t ioprio;
     uint64_t sector;
     char *data;
     uint8_t status;
 } QVirtioBlkReq;

 static char *drive_create(void)
 {
     int fd, ret;
     char *tmp_path = g_strdup("/tmp/qtest.XXXXXX");

     /* 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);

     return tmp_path;
 }

 static QOSState *pci_test_start(void)
 {
     QOSState *qs;
     const char *arch = qtest_get_arch();
     char *tmp_path;
     const char *cmd = "-drive if=none,id=drive0,file=%s,format=raw "
                       "-drive if=none,id=drive1,file=null-co://,format=raw "
                       "-device virtio-blk-pci,id=drv0,drive=drive0,"
                       "addr=%x.%x";

     tmp_path = drive_create();

     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
         qs = qtest_pc_boot(cmd, tmp_path, PCI_SLOT, PCI_FN);
     } else if (strcmp(arch, "ppc64") == 0) {
         qs = qtest_spapr_boot(cmd, tmp_path, PCI_SLOT, PCI_FN);
     } else {
         g_printerr("virtio-blk tests are only available on x86 or ppc64\n");
         exit(EXIT_FAILURE);
     }
     unlink(tmp_path);
     g_free(tmp_path);
     return qs;
 }

 static void arm_test_start(void)
 {
     char *tmp_path;

     tmp_path = drive_create();

     global_qtest = qtest_startf("-machine virt "
                                 "-drive if=none,id=drive0,file=%s,format=raw "
                                 "-device virtio-blk-device,drive=drive0",
                                 tmp_path);
     unlink(tmp_path);
     g_free(tmp_path);
 }

 static void test_end(void)
 {
     qtest_end();
 }

 static QVirtioPCIDevice *virtio_blk_pci_init(QPCIBus *bus, int slot)
 {
     QVirtioPCIDevice *dev;

     dev = qvirtio_pci_device_find_slot(bus, VIRTIO_ID_BLOCK, slot);
     g_assert(dev != NULL);
     g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_BLOCK);
     g_assert_cmphex(dev->pdev->devfn, ==, ((slot << 3) | PCI_FN));

     qvirtio_pci_device_enable(dev);
     qvirtio_reset(&dev->vdev);
     qvirtio_set_acknowledge(&dev->vdev);
     qvirtio_set_driver(&dev->vdev);

     return dev;
 }

 static inline void virtio_blk_fix_request(QVirtioDevice *d, QVirtioBlkReq *req)
 {
 #ifdef HOST_WORDS_BIGENDIAN
     const bool host_is_big_endian = true;
 #else
     const bool host_is_big_endian = false;
 #endif

     if (qvirtio_is_big_endian(d) != host_is_big_endian) {
         req->type = bswap32(req->type);
         req->ioprio = bswap32(req->ioprio);
         req->sector = bswap64(req->sector);
     }
 }

 static uint64_t virtio_blk_request(QGuestAllocator *alloc, QVirtioDevice *d,
                                    QVirtioBlkReq *req, uint64_t data_size)
 {
     uint64_t addr;
     uint8_t status = 0xFF;

     g_assert_cmpuint(data_size % 512, ==, 0);
     addr = guest_alloc(alloc, sizeof(*req) + data_size);

     virtio_blk_fix_request(d, req);

     memwrite(addr, req, 16);
     memwrite(addr + 16, req->data, data_size);
     memwrite(addr + 16 + data_size, &status, sizeof(status));

     return addr;
 }

 static void test_basic(QVirtioDevice *dev, QGuestAllocator *alloc,
                        QVirtQueue *vq)
 {
     QVirtioBlkReq req;
     uint64_t req_addr;
     uint64_t capacity;
     uint32_t features;
     uint32_t free_head;
     uint8_t status;
     char *data;

     capacity = qvirtio_config_readq(dev, 0);

     g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

     features = qvirtio_get_features(dev);
     features = features & ~(QVIRTIO_F_BAD_FEATURE |
                     (1u << VIRTIO_RING_F_INDIRECT_DESC) |
                     (1u << VIRTIO_RING_F_EVENT_IDX) |
                     (1u << VIRTIO_BLK_F_SCSI));
     qvirtio_set_features(dev, features);

     qvirtio_set_driver_ok(dev);

     /* Write and read with 3 descriptor layout */
     /* Write request */
     req.type = VIRTIO_BLK_T_OUT;
     req.ioprio = 1;
     req.sector = 0;
     req.data = g_malloc0(512);
     strcpy(req.data, "TEST");

     req_addr = virtio_blk_request(alloc, dev, &req, 512);

     g_free(req.data);

     free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
     qvirtqueue_add(vq, req_addr + 16, 512, false, true);
     qvirtqueue_add(vq, req_addr + 528, 1, true, false);

     qvirtqueue_kick(dev, vq, free_head);

     qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
     status = readb(req_addr + 528);
     g_assert_cmpint(status, ==, 0);

     guest_free(alloc, req_addr);

     /* Read request */
     req.type = VIRTIO_BLK_T_IN;
     req.ioprio = 1;
     req.sector = 0;
     req.data = g_malloc0(512);

     req_addr = virtio_blk_request(alloc, dev, &req, 512);

     g_free(req.data);

     free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
     qvirtqueue_add(vq, req_addr + 16, 512, true, true);
     qvirtqueue_add(vq, req_addr + 528, 1, true, false);

     qvirtqueue_kick(dev, vq, free_head);

     qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
     status = readb(req_addr + 528);
     g_assert_cmpint(status, ==, 0);

     data = g_malloc0(512);
     memread(req_addr + 16, data, 512);
     g_assert_cmpstr(data, ==, "TEST");
     g_free(data);

     guest_free(alloc, req_addr);

     if (features & (1u << VIRTIO_F_ANY_LAYOUT)) {
         /* Write and read with 2 descriptor layout */
         /* Write request */
         req.type = VIRTIO_BLK_T_OUT;
         req.ioprio = 1;
         req.sector = 1;
         req.data = g_malloc0(512);
         strcpy(req.data, "TEST");

         req_addr = virtio_blk_request(alloc, dev, &req, 512);

         g_free(req.data);

         free_head = qvirtqueue_add(vq, req_addr, 528, false, true);
         qvirtqueue_add(vq, req_addr + 528, 1, true, false);
         qvirtqueue_kick(dev, vq, free_head);

         qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
         status = readb(req_addr + 528);
         g_assert_cmpint(status, ==, 0);

         guest_free(alloc, req_addr);

         /* Read request */
         req.type = VIRTIO_BLK_T_IN;
         req.ioprio = 1;
         req.sector = 1;
         req.data = g_malloc0(512);

         req_addr = virtio_blk_request(alloc, dev, &req, 512);

         g_free(req.data);

         free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
         qvirtqueue_add(vq, req_addr + 16, 513, true, false);

         qvirtqueue_kick(dev, vq, free_head);

         qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
         status = readb(req_addr + 528);
         g_assert_cmpint(status, ==, 0);

         data = g_malloc0(512);
         memread(req_addr + 16, data, 512);
         g_assert_cmpstr(data, ==, "TEST");
         g_free(data);

         guest_free(alloc, req_addr);
     }
 }

 static void pci_basic(void)
 {
     QVirtioPCIDevice *dev;
     QOSState *qs;
     QVirtQueuePCI *vqpci;

     qs = pci_test_start();
     dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);

     vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);

     test_basic(&dev->vdev, qs->alloc, &vqpci->vq);

     /* End test */
     qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
     qvirtio_pci_device_disable(dev);
     qvirtio_pci_device_free(dev);
     qtest_shutdown(qs);
 }

 static void pci_indirect(void)
 {
     QVirtioPCIDevice *dev;
     QVirtQueuePCI *vqpci;
     QOSState *qs;
     QVirtioBlkReq req;
     QVRingIndirectDesc *indirect;
     uint64_t req_addr;
     uint64_t capacity;
     uint32_t features;
     uint32_t free_head;
     uint8_t status;
     char *data;

     qs = pci_test_start();

     dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);

     capacity = qvirtio_config_readq(&dev->vdev, 0);
     g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

     features = qvirtio_get_features(&dev->vdev);
     g_assert_cmphex(features & (1u << VIRTIO_RING_F_INDIRECT_DESC), !=, 0);
     features = features & ~(QVIRTIO_F_BAD_FEATURE |
                             (1u << VIRTIO_RING_F_EVENT_IDX) |
                             (1u << VIRTIO_BLK_F_SCSI));
     qvirtio_set_features(&dev->vdev, features);

     vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);
     qvirtio_set_driver_ok(&dev->vdev);

     /* Write request */
     req.type = VIRTIO_BLK_T_OUT;
     req.ioprio = 1;
     req.sector = 0;
     req.data = g_malloc0(512);
     strcpy(req.data, "TEST");

     req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

     g_free(req.data);

     indirect = qvring_indirect_desc_setup(&dev->vdev, qs->alloc, 2);
     qvring_indirect_desc_add(indirect, req_addr, 528, false);
     qvring_indirect_desc_add(indirect, req_addr + 528, 1, true);
     free_head = qvirtqueue_add_indirect(&vqpci->vq, indirect);
     qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

     qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
                            QVIRTIO_BLK_TIMEOUT_US);
     status = readb(req_addr + 528);
     g_assert_cmpint(status, ==, 0);

     g_free(indirect);
     guest_free(qs->alloc, req_addr);

     /* Read request */
     req.type = VIRTIO_BLK_T_IN;
     req.ioprio = 1;
     req.sector = 0;
     req.data = g_malloc0(512);
     strcpy(req.data, "TEST");

     req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

     g_free(req.data);

     indirect = qvring_indirect_desc_setup(&dev->vdev, qs->alloc, 2);
     qvring_indirect_desc_add(indirect, req_addr, 16, false);
     qvring_indirect_desc_add(indirect, req_addr + 16, 513, true);
     free_head = qvirtqueue_add_indirect(&vqpci->vq, indirect);
     qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

     qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
                            QVIRTIO_BLK_TIMEOUT_US);
     status = readb(req_addr + 528);
     g_assert_cmpint(status, ==, 0);

     data = g_malloc0(512);
     memread(req_addr + 16, data, 512);
     g_assert_cmpstr(data, ==, "TEST");
     g_free(data);

     g_free(indirect);
     guest_free(qs->alloc, req_addr);

     /* End test */
     qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
     qvirtio_pci_device_disable(dev);
     qvirtio_pci_device_free(dev);
     qtest_shutdown(qs);
 }

 static void pci_config(void)
 {
     QVirtioPCIDevice *dev;
     QOSState *qs;
     int n_size = TEST_IMAGE_SIZE / 2;
     uint64_t capacity;

     qs = pci_test_start();

     dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);

     capacity = qvirtio_config_readq(&dev->vdev, 0);
     g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

     qvirtio_set_driver_ok(&dev->vdev);

     qmp_discard_response("{ 'execute': 'block_resize', "
                          " 'arguments': { 'device': 'drive0', "
                          " 'size': %d } }", n_size);
     qvirtio_wait_config_isr(&dev->vdev, QVIRTIO_BLK_TIMEOUT_US);

     capacity = qvirtio_config_readq(&dev->vdev, 0);
     g_assert_cmpint(capacity, ==, n_size / 512);

     qvirtio_pci_device_disable(dev);
     qvirtio_pci_device_free(dev);

     qtest_shutdown(qs);
 }

 static void pci_msix(void)
 {
     QVirtioPCIDevice *dev;
     QOSState *qs;
     QVirtQueuePCI *vqpci;
     QVirtioBlkReq req;
     int n_size = TEST_IMAGE_SIZE / 2;
     uint64_t req_addr;
     uint64_t capacity;
     uint32_t features;
     uint32_t free_head;
     uint8_t status;
     char *data;

     qs = pci_test_start();

     dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);
     qpci_msix_enable(dev->pdev);

     qvirtio_pci_set_msix_configuration_vector(dev, qs->alloc, 0);

     capacity = qvirtio_config_readq(&dev->vdev, 0);
     g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

     features = qvirtio_get_features(&dev->vdev);
     features = features & ~(QVIRTIO_F_BAD_FEATURE |
                             (1u << VIRTIO_RING_F_INDIRECT_DESC) |
                             (1u << VIRTIO_RING_F_EVENT_IDX) |
                             (1u << VIRTIO_BLK_F_SCSI));
     qvirtio_set_features(&dev->vdev, features);

     vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);
     qvirtqueue_pci_msix_setup(dev, vqpci, qs->alloc, 1);

     qvirtio_set_driver_ok(&dev->vdev);

     qmp_discard_response("{ 'execute': 'block_resize', "
                          " 'arguments': { 'device': 'drive0', "
                          " 'size': %d } }", n_size);

     qvirtio_wait_config_isr(&dev->vdev, QVIRTIO_BLK_TIMEOUT_US);

     capacity = qvirtio_config_readq(&dev->vdev, 0);
     g_assert_cmpint(capacity, ==, n_size / 512);

     /* Write request */
     req.type = VIRTIO_BLK_T_OUT;
     req.ioprio = 1;
     req.sector = 0;
     req.data = g_malloc0(512);
     strcpy(req.data, "TEST");

     req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

     g_free(req.data);

     free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
     qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

     qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
                            QVIRTIO_BLK_TIMEOUT_US);

     status = readb(req_addr + 528);
     g_assert_cmpint(status, ==, 0);

     guest_free(qs->alloc, req_addr);

     /* Read request */
     req.type = VIRTIO_BLK_T_IN;
     req.ioprio = 1;
     req.sector = 0;
     req.data = g_malloc0(512);

     req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

     g_free(req.data);

     free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, true, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);

     qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);


     qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
                            QVIRTIO_BLK_TIMEOUT_US);

     status = readb(req_addr + 528);
     g_assert_cmpint(status, ==, 0);

     data = g_malloc0(512);
     memread(req_addr + 16, data, 512);
     g_assert_cmpstr(data, ==, "TEST");
     g_free(data);

     guest_free(qs->alloc, req_addr);

     /* End test */
     qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
     qpci_msix_disable(dev->pdev);
     qvirtio_pci_device_disable(dev);
     qvirtio_pci_device_free(dev);
     qtest_shutdown(qs);
 }

 static void pci_idx(void)
 {
     QVirtioPCIDevice *dev;
     QOSState *qs;
     QVirtQueuePCI *vqpci;
     QVirtioBlkReq req;
     uint64_t req_addr;
     uint64_t capacity;
     uint32_t features;
     uint32_t free_head;
     uint32_t write_head;
     uint32_t desc_idx;
     uint8_t status;
     char *data;

     qs = pci_test_start();

     dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);
     qpci_msix_enable(dev->pdev);

     qvirtio_pci_set_msix_configuration_vector(dev, qs->alloc, 0);

     capacity = qvirtio_config_readq(&dev->vdev, 0);
     g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

     features = qvirtio_get_features(&dev->vdev);
     features = features & ~(QVIRTIO_F_BAD_FEATURE |
                             (1u << VIRTIO_RING_F_INDIRECT_DESC) |
                             (1u << VIRTIO_F_NOTIFY_ON_EMPTY) |
                             (1u << VIRTIO_BLK_F_SCSI));
     qvirtio_set_features(&dev->vdev, features);

     vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);
     qvirtqueue_pci_msix_setup(dev, vqpci, qs->alloc, 1);

     qvirtio_set_driver_ok(&dev->vdev);

     /* Write request */
     req.type = VIRTIO_BLK_T_OUT;
     req.ioprio = 1;
     req.sector = 0;
     req.data = g_malloc0(512);
     strcpy(req.data, "TEST");

     req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

     g_free(req.data);

     free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
     qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

     qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
                            QVIRTIO_BLK_TIMEOUT_US);

     /* Write request */
     req.type = VIRTIO_BLK_T_OUT;
     req.ioprio = 1;
     req.sector = 1;
     req.data = g_malloc0(512);
     strcpy(req.data, "TEST");

     req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

     g_free(req.data);

     /* Notify after processing the third request */
     qvirtqueue_set_used_event(&vqpci->vq, 2);
     free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
     qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
     write_head = free_head;

     /* No notification expected */
     status = qvirtio_wait_status_byte_no_isr(&dev->vdev,
                                              &vqpci->vq, req_addr + 528,
                                              QVIRTIO_BLK_TIMEOUT_US);
     g_assert_cmpint(status, ==, 0);

     guest_free(qs->alloc, req_addr);

     /* Read request */
     req.type = VIRTIO_BLK_T_IN;
     req.ioprio = 1;
     req.sector = 1;
     req.data = g_malloc0(512);

     req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

     g_free(req.data);

     free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, true, true);
     qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);

     qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

     /* We get just one notification for both requests */
     qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, write_head,
                            QVIRTIO_BLK_TIMEOUT_US);
     g_assert(qvirtqueue_get_buf(&vqpci->vq, &desc_idx));
     g_assert_cmpint(desc_idx, ==, free_head);

     status = readb(req_addr + 528);
     g_assert_cmpint(status, ==, 0);

     data = g_malloc0(512);
     memread(req_addr + 16, data, 512);
     g_assert_cmpstr(data, ==, "TEST");
     g_free(data);

     guest_free(qs->alloc, req_addr);

     /* End test */
     qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
     qpci_msix_disable(dev->pdev);
     qvirtio_pci_device_disable(dev);
     qvirtio_pci_device_free(dev);
     qtest_shutdown(qs);
 }

 static void pci_hotplug(void)
 {
     QVirtioPCIDevice *dev;
     QOSState *qs;
     const char *arch = qtest_get_arch();

     qs = pci_test_start();

     /* plug secondary disk */
     qpci_plug_device_test("virtio-blk-pci", "drv1", PCI_SLOT_HP,
                           "'drive': 'drive1'");

     dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT_HP);
     g_assert(dev);
     qvirtio_pci_device_disable(dev);
     qvirtio_pci_device_free(dev);

     /* unplug secondary disk */
     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
         qpci_unplug_acpi_device_test("drv1", PCI_SLOT_HP);
     }
     qtest_shutdown(qs);
 }

 /*
  * Check that setting the vring addr on a non-existent virtqueue does
  * not crash.
  */
 static void test_nonexistent_virtqueue(void)
 {
     QPCIBar bar0;
     QOSState *qs;
     QPCIDevice *dev;

     qs = pci_test_start();
     dev = qpci_device_find(qs->pcibus, QPCI_DEVFN(4, 0));
     g_assert(dev != NULL);

     qpci_device_enable(dev);
     bar0 = qpci_iomap(dev, 0, NULL);

     qpci_io_writeb(dev, bar0, VIRTIO_PCI_QUEUE_SEL, 2);
     qpci_io_writel(dev, bar0, VIRTIO_PCI_QUEUE_PFN, 1);

     g_free(dev);
     qtest_shutdown(qs);
 }

 static void mmio_basic(void)
 {
     QVirtioMMIODevice *dev;
     QVirtQueue *vq;
     QGuestAllocator *alloc;
     int n_size = TEST_IMAGE_SIZE / 2;
     uint64_t capacity;

     arm_test_start();

     dev = qvirtio_mmio_init_device(MMIO_DEV_BASE_ADDR, MMIO_PAGE_SIZE);
     g_assert(dev != NULL);
     g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_BLOCK);

     qvirtio_reset(&dev->vdev);
     qvirtio_set_acknowledge(&dev->vdev);
     qvirtio_set_driver(&dev->vdev);

     alloc = generic_alloc_init(MMIO_RAM_ADDR, MMIO_RAM_SIZE, MMIO_PAGE_SIZE);
     vq = qvirtqueue_setup(&dev->vdev, alloc, 0);

     test_basic(&dev->vdev, alloc, vq);

     qmp_discard_response("{ 'execute': 'block_resize', "
                          " 'arguments': { 'device': 'drive0', "
                          " 'size': %d } }", n_size);

     qvirtio_wait_queue_isr(&dev->vdev, vq, QVIRTIO_BLK_TIMEOUT_US);

     capacity = qvirtio_config_readq(&dev->vdev, 0);
     g_assert_cmpint(capacity, ==, n_size / 512);

     /* End test */
     qvirtqueue_cleanup(dev->vdev.bus, vq, alloc);
     g_free(dev);
     generic_alloc_uninit(alloc);
     test_end();
 }

 int main(int argc, char **argv)
 {
     const char *arch = qtest_get_arch();

     g_test_init(&argc, &argv, NULL);

     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0 ||
         strcmp(arch, "ppc64") == 0) {
         qtest_add_func("/virtio/blk/pci/basic", pci_basic);
         qtest_add_func("/virtio/blk/pci/indirect", pci_indirect);
         qtest_add_func("/virtio/blk/pci/config", pci_config);
         qtest_add_func("/virtio/blk/pci/nxvirtq", test_nonexistent_virtqueue);
         if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
             qtest_add_func("/virtio/blk/pci/msix", pci_msix);
             qtest_add_func("/virtio/blk/pci/idx", pci_idx);
         }
         qtest_add_func("/virtio/blk/pci/hotplug", pci_hotplug);
     } else if (strcmp(arch, "arm") == 0) {
         qtest_add_func("/virtio/blk/mmio/basic", mmio_basic);
     }

     return g_test_run();
 }
	/*
	* 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.
	*/

	#include "qemu/osdep.h"
	#include "libqtest.h"
	#include "libqos/libqos-pc.h"
	#include "libqos/libqos-spapr.h"
	#include "libqos/virtio.h"
	#include "libqos/virtio-pci.h"
	#include "libqos/virtio-mmio.h"
	#include "libqos/malloc-generic.h"
	#include "qemu/bswap.h"
	#include "standard-headers/linux/virtio_ids.h"
	#include "standard-headers/linux/virtio_config.h"
	#include "standard-headers/linux/virtio_ring.h"
	#include "standard-headers/linux/virtio_blk.h"
	#include "standard-headers/linux/virtio_pci.h"

	#define TEST_IMAGE_SIZE (64 * 1024 * 1024)
	#define QVIRTIO_BLK_TIMEOUT_US (30 * 1000 * 1000)
	#define PCI_SLOT_HP 0x06
	#define PCI_SLOT 0x04
	#define PCI_FN 0x00

	#define MMIO_PAGE_SIZE 4096
	#define MMIO_DEV_BASE_ADDR 0x0A003E00
	#define MMIO_RAM_ADDR 0x40000000
	#define MMIO_RAM_SIZE 0x20000000

	typedef struct QVirtioBlkReq {
	uint32_t type;
	uint32_t ioprio;
	uint64_t sector;
	char *data;
	uint8_t status;
	} QVirtioBlkReq;

	static char *drive_create(void)
	{
	int fd, ret;
	char *tmp_path = g_strdup("/tmp/qtest.XXXXXX");

	/* 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);

	return tmp_path;
	}

	static QOSState *pci_test_start(void)
	{
	QOSState *qs;
	const char *arch = qtest_get_arch();
	char *tmp_path;
	const char *cmd = "-drive if=none,id=drive0,file=%s,format=raw "
	"-drive if=none,id=drive1,file=null-co://,format=raw "
	"-device virtio-blk-pci,id=drv0,drive=drive0,"
	"addr=%x.%x";

	tmp_path = drive_create();

	if (strcmp(arch, "i386") == 0 \|\| strcmp(arch, "x86_64") == 0) {
	qs = qtest_pc_boot(cmd, tmp_path, PCI_SLOT, PCI_FN);
	} else if (strcmp(arch, "ppc64") == 0) {
	qs = qtest_spapr_boot(cmd, tmp_path, PCI_SLOT, PCI_FN);
	} else {
	g_printerr("virtio-blk tests are only available on x86 or ppc64\n");
	exit(EXIT_FAILURE);
	}
	unlink(tmp_path);
	g_free(tmp_path);
	return qs;
	}

	static void arm_test_start(void)
	{
	char *tmp_path;

	tmp_path = drive_create();

	global_qtest = qtest_startf("-machine virt "
	"-drive if=none,id=drive0,file=%s,format=raw "
	"-device virtio-blk-device,drive=drive0",
	tmp_path);
	unlink(tmp_path);
	g_free(tmp_path);
	}

	static void test_end(void)
	{
	qtest_end();
	}

	static QVirtioPCIDevice virtio_blk_pci_init(QPCIBus bus, int slot)
	{
	QVirtioPCIDevice *dev;

	dev = qvirtio_pci_device_find_slot(bus, VIRTIO_ID_BLOCK, slot);
	g_assert(dev != NULL);
	g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_BLOCK);
	g_assert_cmphex(dev->pdev->devfn, ==, ((slot << 3) \| PCI_FN));

	qvirtio_pci_device_enable(dev);
	qvirtio_reset(&dev->vdev);
	qvirtio_set_acknowledge(&dev->vdev);
	qvirtio_set_driver(&dev->vdev);

	return dev;
	}

	static inline void virtio_blk_fix_request(QVirtioDevice d, QVirtioBlkReq req)
	{
	#ifdef HOST_WORDS_BIGENDIAN
	const bool host_is_big_endian = true;
	#else
	const bool host_is_big_endian = false;
	#endif

	if (qvirtio_is_big_endian(d) != host_is_big_endian) {
	req->type = bswap32(req->type);
	req->ioprio = bswap32(req->ioprio);
	req->sector = bswap64(req->sector);
	}
	}

	static uint64_t virtio_blk_request(QGuestAllocator alloc, QVirtioDevice d,
	QVirtioBlkReq *req, uint64_t data_size)
	{
	uint64_t addr;
	uint8_t status = 0xFF;

	g_assert_cmpuint(data_size % 512, ==, 0);
	addr = guest_alloc(alloc, sizeof(*req) + data_size);

	virtio_blk_fix_request(d, req);

	memwrite(addr, req, 16);
	memwrite(addr + 16, req->data, data_size);
	memwrite(addr + 16 + data_size, &status, sizeof(status));

	return addr;
	}

	static void test_basic(QVirtioDevice dev, QGuestAllocator alloc,
	QVirtQueue *vq)
	{
	QVirtioBlkReq req;
	uint64_t req_addr;
	uint64_t capacity;
	uint32_t features;
	uint32_t free_head;
	uint8_t status;
	char *data;

	capacity = qvirtio_config_readq(dev, 0);

	g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

	features = qvirtio_get_features(dev);
	features = features & ~(QVIRTIO_F_BAD_FEATURE \|
	(1u << VIRTIO_RING_F_INDIRECT_DESC) \|
	(1u << VIRTIO_RING_F_EVENT_IDX) \|
	(1u << VIRTIO_BLK_F_SCSI));
	qvirtio_set_features(dev, features);

	qvirtio_set_driver_ok(dev);

	/* Write and read with 3 descriptor layout */
	/* Write request */
	req.type = VIRTIO_BLK_T_OUT;
	req.ioprio = 1;
	req.sector = 0;
	req.data = g_malloc0(512);
	strcpy(req.data, "TEST");

	req_addr = virtio_blk_request(alloc, dev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
	qvirtqueue_add(vq, req_addr + 16, 512, false, true);
	qvirtqueue_add(vq, req_addr + 528, 1, true, false);

	qvirtqueue_kick(dev, vq, free_head);

	qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	guest_free(alloc, req_addr);

	/* Read request */
	req.type = VIRTIO_BLK_T_IN;
	req.ioprio = 1;
	req.sector = 0;
	req.data = g_malloc0(512);

	req_addr = virtio_blk_request(alloc, dev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
	qvirtqueue_add(vq, req_addr + 16, 512, true, true);
	qvirtqueue_add(vq, req_addr + 528, 1, true, false);

	qvirtqueue_kick(dev, vq, free_head);

	qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	data = g_malloc0(512);
	memread(req_addr + 16, data, 512);
	g_assert_cmpstr(data, ==, "TEST");
	g_free(data);

	guest_free(alloc, req_addr);

	if (features & (1u << VIRTIO_F_ANY_LAYOUT)) {
	/* Write and read with 2 descriptor layout */
	/* Write request */
	req.type = VIRTIO_BLK_T_OUT;
	req.ioprio = 1;
	req.sector = 1;
	req.data = g_malloc0(512);
	strcpy(req.data, "TEST");

	req_addr = virtio_blk_request(alloc, dev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(vq, req_addr, 528, false, true);
	qvirtqueue_add(vq, req_addr + 528, 1, true, false);
	qvirtqueue_kick(dev, vq, free_head);

	qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	guest_free(alloc, req_addr);

	/* Read request */
	req.type = VIRTIO_BLK_T_IN;
	req.ioprio = 1;
	req.sector = 1;
	req.data = g_malloc0(512);

	req_addr = virtio_blk_request(alloc, dev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(vq, req_addr, 16, false, true);
	qvirtqueue_add(vq, req_addr + 16, 513, true, false);

	qvirtqueue_kick(dev, vq, free_head);

	qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	data = g_malloc0(512);
	memread(req_addr + 16, data, 512);
	g_assert_cmpstr(data, ==, "TEST");
	g_free(data);

	guest_free(alloc, req_addr);
	}
	}

	static void pci_basic(void)
	{
	QVirtioPCIDevice *dev;
	QOSState *qs;
	QVirtQueuePCI *vqpci;

	qs = pci_test_start();
	dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);

	vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);

	test_basic(&dev->vdev, qs->alloc, &vqpci->vq);

	/* End test */
	qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
	qvirtio_pci_device_disable(dev);
	qvirtio_pci_device_free(dev);
	qtest_shutdown(qs);
	}

	static void pci_indirect(void)
	{
	QVirtioPCIDevice *dev;
	QVirtQueuePCI *vqpci;
	QOSState *qs;
	QVirtioBlkReq req;
	QVRingIndirectDesc *indirect;
	uint64_t req_addr;
	uint64_t capacity;
	uint32_t features;
	uint32_t free_head;
	uint8_t status;
	char *data;

	qs = pci_test_start();

	dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);

	capacity = qvirtio_config_readq(&dev->vdev, 0);
	g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

	features = qvirtio_get_features(&dev->vdev);
	g_assert_cmphex(features & (1u << VIRTIO_RING_F_INDIRECT_DESC), !=, 0);
	features = features & ~(QVIRTIO_F_BAD_FEATURE \|
	(1u << VIRTIO_RING_F_EVENT_IDX) \|
	(1u << VIRTIO_BLK_F_SCSI));
	qvirtio_set_features(&dev->vdev, features);

	vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);
	qvirtio_set_driver_ok(&dev->vdev);

	/* Write request */
	req.type = VIRTIO_BLK_T_OUT;
	req.ioprio = 1;
	req.sector = 0;
	req.data = g_malloc0(512);
	strcpy(req.data, "TEST");

	req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

	g_free(req.data);

	indirect = qvring_indirect_desc_setup(&dev->vdev, qs->alloc, 2);
	qvring_indirect_desc_add(indirect, req_addr, 528, false);
	qvring_indirect_desc_add(indirect, req_addr + 528, 1, true);
	free_head = qvirtqueue_add_indirect(&vqpci->vq, indirect);
	qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

	qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
	QVIRTIO_BLK_TIMEOUT_US);
	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	g_free(indirect);
	guest_free(qs->alloc, req_addr);

	/* Read request */
	req.type = VIRTIO_BLK_T_IN;
	req.ioprio = 1;
	req.sector = 0;
	req.data = g_malloc0(512);
	strcpy(req.data, "TEST");

	req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

	g_free(req.data);

	indirect = qvring_indirect_desc_setup(&dev->vdev, qs->alloc, 2);
	qvring_indirect_desc_add(indirect, req_addr, 16, false);
	qvring_indirect_desc_add(indirect, req_addr + 16, 513, true);
	free_head = qvirtqueue_add_indirect(&vqpci->vq, indirect);
	qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

	qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
	QVIRTIO_BLK_TIMEOUT_US);
	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	data = g_malloc0(512);
	memread(req_addr + 16, data, 512);
	g_assert_cmpstr(data, ==, "TEST");
	g_free(data);

	g_free(indirect);
	guest_free(qs->alloc, req_addr);

	/* End test */
	qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
	qvirtio_pci_device_disable(dev);
	qvirtio_pci_device_free(dev);
	qtest_shutdown(qs);
	}

	static void pci_config(void)
	{
	QVirtioPCIDevice *dev;
	QOSState *qs;
	int n_size = TEST_IMAGE_SIZE / 2;
	uint64_t capacity;

	qs = pci_test_start();

	dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);

	capacity = qvirtio_config_readq(&dev->vdev, 0);
	g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

	qvirtio_set_driver_ok(&dev->vdev);

	qmp_discard_response("{ 'execute': 'block_resize', "
	" 'arguments': { 'device': 'drive0', "
	" 'size': %d } }", n_size);
	qvirtio_wait_config_isr(&dev->vdev, QVIRTIO_BLK_TIMEOUT_US);

	capacity = qvirtio_config_readq(&dev->vdev, 0);
	g_assert_cmpint(capacity, ==, n_size / 512);

	qvirtio_pci_device_disable(dev);
	qvirtio_pci_device_free(dev);

	qtest_shutdown(qs);
	}

	static void pci_msix(void)
	{
	QVirtioPCIDevice *dev;
	QOSState *qs;
	QVirtQueuePCI *vqpci;
	QVirtioBlkReq req;
	int n_size = TEST_IMAGE_SIZE / 2;
	uint64_t req_addr;
	uint64_t capacity;
	uint32_t features;
	uint32_t free_head;
	uint8_t status;
	char *data;

	qs = pci_test_start();

	dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);
	qpci_msix_enable(dev->pdev);

	qvirtio_pci_set_msix_configuration_vector(dev, qs->alloc, 0);

	capacity = qvirtio_config_readq(&dev->vdev, 0);
	g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

	features = qvirtio_get_features(&dev->vdev);
	features = features & ~(QVIRTIO_F_BAD_FEATURE \|
	(1u << VIRTIO_RING_F_INDIRECT_DESC) \|
	(1u << VIRTIO_RING_F_EVENT_IDX) \|
	(1u << VIRTIO_BLK_F_SCSI));
	qvirtio_set_features(&dev->vdev, features);

	vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);
	qvirtqueue_pci_msix_setup(dev, vqpci, qs->alloc, 1);

	qvirtio_set_driver_ok(&dev->vdev);

	qmp_discard_response("{ 'execute': 'block_resize', "
	" 'arguments': { 'device': 'drive0', "
	" 'size': %d } }", n_size);

	qvirtio_wait_config_isr(&dev->vdev, QVIRTIO_BLK_TIMEOUT_US);

	capacity = qvirtio_config_readq(&dev->vdev, 0);
	g_assert_cmpint(capacity, ==, n_size / 512);

	/* Write request */
	req.type = VIRTIO_BLK_T_OUT;
	req.ioprio = 1;
	req.sector = 0;
	req.data = g_malloc0(512);
	strcpy(req.data, "TEST");

	req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
	qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

	qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
	QVIRTIO_BLK_TIMEOUT_US);

	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	guest_free(qs->alloc, req_addr);

	/* Read request */
	req.type = VIRTIO_BLK_T_IN;
	req.ioprio = 1;
	req.sector = 0;
	req.data = g_malloc0(512);

	req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, true, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);

	qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);


	qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
	QVIRTIO_BLK_TIMEOUT_US);

	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	data = g_malloc0(512);
	memread(req_addr + 16, data, 512);
	g_assert_cmpstr(data, ==, "TEST");
	g_free(data);

	guest_free(qs->alloc, req_addr);

	/* End test */
	qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
	qpci_msix_disable(dev->pdev);
	qvirtio_pci_device_disable(dev);
	qvirtio_pci_device_free(dev);
	qtest_shutdown(qs);
	}

	static void pci_idx(void)
	{
	QVirtioPCIDevice *dev;
	QOSState *qs;
	QVirtQueuePCI *vqpci;
	QVirtioBlkReq req;
	uint64_t req_addr;
	uint64_t capacity;
	uint32_t features;
	uint32_t free_head;
	uint32_t write_head;
	uint32_t desc_idx;
	uint8_t status;
	char *data;

	qs = pci_test_start();

	dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT);
	qpci_msix_enable(dev->pdev);

	qvirtio_pci_set_msix_configuration_vector(dev, qs->alloc, 0);

	capacity = qvirtio_config_readq(&dev->vdev, 0);
	g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE / 512);

	features = qvirtio_get_features(&dev->vdev);
	features = features & ~(QVIRTIO_F_BAD_FEATURE \|
	(1u << VIRTIO_RING_F_INDIRECT_DESC) \|
	(1u << VIRTIO_F_NOTIFY_ON_EMPTY) \|
	(1u << VIRTIO_BLK_F_SCSI));
	qvirtio_set_features(&dev->vdev, features);

	vqpci = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, qs->alloc, 0);
	qvirtqueue_pci_msix_setup(dev, vqpci, qs->alloc, 1);

	qvirtio_set_driver_ok(&dev->vdev);

	/* Write request */
	req.type = VIRTIO_BLK_T_OUT;
	req.ioprio = 1;
	req.sector = 0;
	req.data = g_malloc0(512);
	strcpy(req.data, "TEST");

	req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
	qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

	qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
	QVIRTIO_BLK_TIMEOUT_US);

	/* Write request */
	req.type = VIRTIO_BLK_T_OUT;
	req.ioprio = 1;
	req.sector = 1;
	req.data = g_malloc0(512);
	strcpy(req.data, "TEST");

	req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

	g_free(req.data);

	/* Notify after processing the third request */
	qvirtqueue_set_used_event(&vqpci->vq, 2);
	free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
	qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
	write_head = free_head;

	/* No notification expected */
	status = qvirtio_wait_status_byte_no_isr(&dev->vdev,
	&vqpci->vq, req_addr + 528,
	QVIRTIO_BLK_TIMEOUT_US);
	g_assert_cmpint(status, ==, 0);

	guest_free(qs->alloc, req_addr);

	/* Read request */
	req.type = VIRTIO_BLK_T_IN;
	req.ioprio = 1;
	req.sector = 1;
	req.data = g_malloc0(512);

	req_addr = virtio_blk_request(qs->alloc, &dev->vdev, &req, 512);

	g_free(req.data);

	free_head = qvirtqueue_add(&vqpci->vq, req_addr, 16, false, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 16, 512, true, true);
	qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);

	qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);

	/* We get just one notification for both requests */
	qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, write_head,
	QVIRTIO_BLK_TIMEOUT_US);
	g_assert(qvirtqueue_get_buf(&vqpci->vq, &desc_idx));
	g_assert_cmpint(desc_idx, ==, free_head);

	status = readb(req_addr + 528);
	g_assert_cmpint(status, ==, 0);

	data = g_malloc0(512);
	memread(req_addr + 16, data, 512);
	g_assert_cmpstr(data, ==, "TEST");
	g_free(data);

	guest_free(qs->alloc, req_addr);

	/* End test */
	qvirtqueue_cleanup(dev->vdev.bus, &vqpci->vq, qs->alloc);
	qpci_msix_disable(dev->pdev);
	qvirtio_pci_device_disable(dev);
	qvirtio_pci_device_free(dev);
	qtest_shutdown(qs);
	}

	static void pci_hotplug(void)
	{
	QVirtioPCIDevice *dev;
	QOSState *qs;
	const char *arch = qtest_get_arch();

	qs = pci_test_start();

	/* plug secondary disk */
	qpci_plug_device_test("virtio-blk-pci", "drv1", PCI_SLOT_HP,
	"'drive': 'drive1'");

	dev = virtio_blk_pci_init(qs->pcibus, PCI_SLOT_HP);
	g_assert(dev);
	qvirtio_pci_device_disable(dev);
	qvirtio_pci_device_free(dev);

	/* unplug secondary disk */
	if (strcmp(arch, "i386") == 0 \|\| strcmp(arch, "x86_64") == 0) {
	qpci_unplug_acpi_device_test("drv1", PCI_SLOT_HP);
	}
	qtest_shutdown(qs);
	}

	/*
	* Check that setting the vring addr on a non-existent virtqueue does
	* not crash.
	*/
	static void test_nonexistent_virtqueue(void)
	{
	QPCIBar bar0;
	QOSState *qs;
	QPCIDevice *dev;

	qs = pci_test_start();
	dev = qpci_device_find(qs->pcibus, QPCI_DEVFN(4, 0));
	g_assert(dev != NULL);

	qpci_device_enable(dev);
	bar0 = qpci_iomap(dev, 0, NULL);

	qpci_io_writeb(dev, bar0, VIRTIO_PCI_QUEUE_SEL, 2);
	qpci_io_writel(dev, bar0, VIRTIO_PCI_QUEUE_PFN, 1);

	g_free(dev);
	qtest_shutdown(qs);
	}

	static void mmio_basic(void)
	{
	QVirtioMMIODevice *dev;
	QVirtQueue *vq;
	QGuestAllocator *alloc;
	int n_size = TEST_IMAGE_SIZE / 2;
	uint64_t capacity;

	arm_test_start();

	dev = qvirtio_mmio_init_device(MMIO_DEV_BASE_ADDR, MMIO_PAGE_SIZE);
	g_assert(dev != NULL);
	g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_BLOCK);

	qvirtio_reset(&dev->vdev);
	qvirtio_set_acknowledge(&dev->vdev);
	qvirtio_set_driver(&dev->vdev);

	alloc = generic_alloc_init(MMIO_RAM_ADDR, MMIO_RAM_SIZE, MMIO_PAGE_SIZE);
	vq = qvirtqueue_setup(&dev->vdev, alloc, 0);

	test_basic(&dev->vdev, alloc, vq);

	qmp_discard_response("{ 'execute': 'block_resize', "
	" 'arguments': { 'device': 'drive0', "
	" 'size': %d } }", n_size);

	qvirtio_wait_queue_isr(&dev->vdev, vq, QVIRTIO_BLK_TIMEOUT_US);

	capacity = qvirtio_config_readq(&dev->vdev, 0);
	g_assert_cmpint(capacity, ==, n_size / 512);

	/* End test */
	qvirtqueue_cleanup(dev->vdev.bus, vq, alloc);
	g_free(dev);
	generic_alloc_uninit(alloc);
	test_end();
	}

	int main(int argc, char **argv)
	{
	const char *arch = qtest_get_arch();

	g_test_init(&argc, &argv, NULL);

	if (strcmp(arch, "i386") == 0 \|\| strcmp(arch, "x86_64") == 0 \|\|
	strcmp(arch, "ppc64") == 0) {
	qtest_add_func("/virtio/blk/pci/basic", pci_basic);
	qtest_add_func("/virtio/blk/pci/indirect", pci_indirect);
	qtest_add_func("/virtio/blk/pci/config", pci_config);
	qtest_add_func("/virtio/blk/pci/nxvirtq", test_nonexistent_virtqueue);
	if (strcmp(arch, "i386") == 0 \|\| strcmp(arch, "x86_64") == 0) {
	qtest_add_func("/virtio/blk/pci/msix", pci_msix);
	qtest_add_func("/virtio/blk/pci/idx", pci_idx);
	}
	qtest_add_func("/virtio/blk/pci/hotplug", pci_hotplug);
	} else if (strcmp(arch, "arm") == 0) {
	qtest_add_func("/virtio/blk/mmio/basic", mmio_basic);
	}

	return g_test_run();
	}