From 5d5fe176155e6cfa4a53accb90e4010baa5266d0 Mon Sep 17 00:00:00 2001 From: Changbin Du Date: Tue, 15 Aug 2017 13:20:51 +0800 Subject: [PATCH] drm/i915/kvmgt: Sanitize PCI bar emulation For PCI, 64bit bar consumes two BAR registers, but this doesn't mean both of two BAR are valid. Actually the second BAR is regarded as reserved in this case. So we shouldn't emulate the second BAR. Signed-off-by: Changbin Du Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 83e88c70272a..9201db0892f1 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -661,7 +661,6 @@ static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf, buf, count); break; case VFIO_PCI_BAR0_REGION_INDEX: - case VFIO_PCI_BAR1_REGION_INDEX: if (is_write) { uint64_t bar0_start = intel_vgpu_get_bar0_addr(vgpu); @@ -674,6 +673,7 @@ static ssize_t intel_vgpu_rw(struct mdev_device *mdev, char *buf, bar0_start + pos, buf, count); } break; + case VFIO_PCI_BAR1_REGION_INDEX: case VFIO_PCI_BAR2_REGION_INDEX: case VFIO_PCI_BAR3_REGION_INDEX: case VFIO_PCI_BAR4_REGION_INDEX: -- 2.45.2