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charset="utf-8" VM state change handler gets called on change in VM's state. This is used t= o set VFIO device state to _RUNNING. Signed-off-by: Kirti Wankhede Reviewed-by: Neo Jia --- hw/vfio/migration.c | 87 +++++++++++++++++++++++++++++++++++++++= ++++ hw/vfio/trace-events | 2 + include/hw/vfio/vfio-common.h | 4 ++ 3 files changed, 93 insertions(+) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index bf9384907ec0..e79b34003079 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -10,6 +10,7 @@ #include "qemu/osdep.h" #include =20 +#include "sysemu/runstate.h" #include "hw/vfio/vfio-common.h" #include "cpu.h" #include "migration/migration.h" @@ -74,6 +75,85 @@ err: return ret; } =20 +static int vfio_migration_set_state(VFIODevice *vbasedev, uint32_t mask, + uint32_t value) +{ + VFIOMigration *migration =3D vbasedev->migration; + VFIORegion *region =3D &migration->region; + uint32_t device_state; + int ret; + + ret =3D 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 =3D (device_state & mask) | value; + + if (!VFIO_DEVICE_STATE_VALID(device_state)) { + return -EINVAL; + } + + ret =3D 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 =3D 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 =3D 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 =3D opaque; + + if ((vbasedev->vm_running !=3D running)) { + int ret; + uint32_t value =3D 0, mask =3D 0; + + if (running) { + value =3D VFIO_DEVICE_STATE_RUNNING; + if (vbasedev->device_state & VFIO_DEVICE_STATE_RESUMING) { + mask =3D ~VFIO_DEVICE_STATE_RESUMING; + } + } else { + mask =3D ~VFIO_DEVICE_STATE_RUNNING; + } + + ret =3D 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 =3D running; + trace_vfio_vmstate_change(vbasedev->name, running, RunState_str(st= ate), + 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; } =20 + vbasedev->vm_state =3D qemu_add_vm_change_state_handler(vfio_vmstate_c= hange, + vbasedev); + return 0; } =20 @@ -128,6 +211,10 @@ add_blocker: =20 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); diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index fd034ac53684..14b0a86c0035 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -146,3 +146,5 @@ vfio_display_edid_write_error(void) "" =20 # 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" diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index d4b268641173..3d18eb146b33 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -29,6 +29,7 @@ #ifdef CONFIG_LINUX #include #endif +#include "sysemu/sysemu.h" =20 #define VFIO_MSG_PREFIX "vfio %s: " =20 @@ -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; =20 struct VFIODeviceOps { --=20 2.7.0