p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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 <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Changbin Du 2017-08-15 13:20:51 +08:00 committed by Zhenyu Wang
parent bb9d2d0505
commit 5d5fe17615
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/gvt/kvmgt.c
View File

@ -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: