From: Changbin Du Date: Tue, 15 Aug 2017 05:20:51 +0000 (+0800) Subject: drm/i915/kvmgt: Sanitize PCI bar emulation X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5d5fe176155e6cfa4a53accb90e4010baa5266d0;p=linux.git 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 --- diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 83e88c70272a5..9201db0892f1e 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: