diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/kvmgt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/kvmgt.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 1466d8769ec9..df4e4a07db3d 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -123,6 +123,12 @@ static int gvt_dma_map_page(struct intel_vgpu *vgpu, unsigned long gfn, return -EINVAL; } + if (!pfn_valid(pfn)) { + gvt_vgpu_err("pfn 0x%lx is not mem backed\n", pfn); + vfio_unpin_pages(mdev_dev(vgpu->vdev.mdev), &gfn, 1); + return -EINVAL; + } + /* Setup DMA mapping. */ page = pfn_to_page(pfn); *dma_addr = dma_map_page(dev, page, 0, PAGE_SIZE, @@ -583,6 +589,17 @@ out: return ret; } +static void intel_vgpu_release_msi_eventfd_ctx(struct intel_vgpu *vgpu) +{ + struct eventfd_ctx *trigger; + + trigger = vgpu->vdev.msi_trigger; + if (trigger) { + eventfd_ctx_put(trigger); + vgpu->vdev.msi_trigger = NULL; + } +} + static void __intel_vgpu_release(struct intel_vgpu *vgpu) { struct kvmgt_guest_info *info; @@ -607,6 +624,8 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu) info = (struct kvmgt_guest_info *)vgpu->handle; kvmgt_guest_exit(info); + intel_vgpu_release_msi_eventfd_ctx(vgpu); + vgpu->vdev.kvm = NULL; vgpu->handle = 0; } @@ -987,7 +1006,8 @@ static int intel_vgpu_set_msi_trigger(struct intel_vgpu *vgpu, return PTR_ERR(trigger); } vgpu->vdev.msi_trigger = trigger; - } + } else if ((flags & VFIO_IRQ_SET_DATA_NONE) && !count) + intel_vgpu_release_msi_eventfd_ctx(vgpu); return 0; } @@ -1592,6 +1612,18 @@ static int kvmgt_inject_msi(unsigned long handle, u32 addr, u16 data) info = (struct kvmgt_guest_info *)handle; vgpu = info->vgpu; + /* + * When guest is poweroff, msi_trigger is set to NULL, but vgpu's + * config and mmio register isn't restored to default during guest + * poweroff. If this vgpu is still used in next vm, this vgpu's pipe + * may be enabled, then once this vgpu is active, it will get inject + * vblank interrupt request. But msi_trigger is null until msi is + * enabled by guest. so if msi_trigger is null, success is still + * returned and don't inject interrupt into guest. + */ + if (vgpu->vdev.msi_trigger == NULL) + return 0; + if (eventfd_signal(vgpu->vdev.msi_trigger, 1) == 1) return 0; |