@@ -10,6 +10,7 @@
#include "qemu/osdep.h"
#include <linux/vfio.h>
+#include "sysemu/runstate.h"
#include "hw/vfio/vfio-common.h"
#include "cpu.h"
#include "migration/migration.h"
@@ -74,6 +75,85 @@ err:
return ret;
}
+static int vfio_migration_set_state(VFIODevice *vbasedev, uint32_t mask,
+ uint32_t value)
+{
+ VFIOMigration *migration = vbasedev->migration;
+ VFIORegion *region = &migration->region;
+ uint32_t device_state;
+ int ret;
+
+ ret = pread(vbasedev->fd, &device_state, sizeof(device_state),
+ region->fd_offset + offsetof(struct vfio_device_migration_info,
+ device_state));
+ if (ret < 0) {
+ error_report("%s: Failed to read device state %d %s",
+ vbasedev->name, ret, strerror(errno));
+ return ret;
+ }
+
+ device_state = (device_state & mask) | value;
+
+ if (!VFIO_DEVICE_STATE_VALID(device_state)) {
+ return -EINVAL;
+ }
+
+ ret = pwrite(vbasedev->fd, &device_state, sizeof(device_state),
+ region->fd_offset + offsetof(struct vfio_device_migration_info,
+ device_state));
+ if (ret < 0) {
+ error_report("%s: Failed to set device state %d %s",
+ vbasedev->name, ret, strerror(errno));
+
+ ret = pread(vbasedev->fd, &device_state, sizeof(device_state),
+ region->fd_offset + offsetof(struct vfio_device_migration_info,
+ device_state));
+ if (ret < 0) {
+ error_report("%s: On failure, failed to read device state %d %s",
+ vbasedev->name, ret, strerror(errno));
+ return ret;
+ }
+
+ if (VFIO_DEVICE_STATE_IS_ERROR(device_state)) {
+ error_report("%s: Device is in error state 0x%x",
+ vbasedev->name, device_state);
+ return -EFAULT;
+ }
+ }
+
+ vbasedev->device_state = device_state;
+ trace_vfio_migration_set_state(vbasedev->name, device_state);
+ return 0;
+}
+
+static void vfio_vmstate_change(void *opaque, int running, RunState state)
+{
+ VFIODevice *vbasedev = opaque;
+
+ if ((vbasedev->vm_running != running)) {
+ int ret;
+ uint32_t value = 0, mask = 0;
+
+ if (running) {
+ value = VFIO_DEVICE_STATE_RUNNING;
+ if (vbasedev->device_state & VFIO_DEVICE_STATE_RESUMING) {
+ mask = ~VFIO_DEVICE_STATE_RESUMING;
+ }
+ } else {
+ mask = ~VFIO_DEVICE_STATE_RUNNING;
+ }
+
+ ret = vfio_migration_set_state(vbasedev, mask, value);
+ if (ret) {
+ error_report("%s: Failed to set device state 0x%x",
+ vbasedev->name, value & mask);
+ }
+ vbasedev->vm_running = running;
+ trace_vfio_vmstate_change(vbasedev->name, running, RunState_str(state),
+ value & mask);
+ }
+}
+
static int vfio_migration_init(VFIODevice *vbasedev,
struct vfio_region_info *info)
{
@@ -90,6 +170,9 @@ static int vfio_migration_init(VFIODevice *vbasedev,
return ret;
}
+ vbasedev->vm_state = qemu_add_vm_change_state_handler(vfio_vmstate_change,
+ vbasedev);
+
return 0;
}
@@ -128,6 +211,10 @@ add_blocker:
void vfio_migration_finalize(VFIODevice *vbasedev)
{
+ if (vbasedev->vm_state) {
+ qemu_del_vm_change_state_handler(vbasedev->vm_state);
+ }
+
if (vbasedev->migration_blocker) {
migrate_del_blocker(vbasedev->migration_blocker);
error_free(vbasedev->migration_blocker);
@@ -146,3 +146,5 @@ vfio_display_edid_write_error(void) ""
# migration.c
vfio_migration_probe(const char *name, uint32_t index) " (%s) Region %d"
+vfio_migration_set_state(char *name, uint32_t state) " (%s) state %d"
+vfio_vmstate_change(char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %d"
@@ -29,6 +29,7 @@
#ifdef CONFIG_LINUX
#include <linux/vfio.h>
#endif
+#include "sysemu/sysemu.h"
#define VFIO_MSG_PREFIX "vfio %s: "
@@ -119,6 +120,9 @@ typedef struct VFIODevice {
unsigned int flags;
VFIOMigration *migration;
Error *migration_blocker;
+ VMChangeStateEntry *vm_state;
+ uint32_t device_state;
+ int vm_running;
} VFIODevice;
struct VFIODeviceOps {