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hv: More changes to enable GPU passthru

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Snoop control is not supported in the graphics VT-d engine and so should
be disabled in the PTEs. Also enabled iommu for graphics in the
dmar_drhd array.

v2: removed disable iommu in handle_one_drhd and combined if cond.
v3: minor code review changes
v4: moved the snoop control change to ept.c to accomodate upstream changes
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@intel.com>
Reviewed-by: Gong Zhipeng <zhipeng.gong@intel.com>
This commit is contained in:
Anitha Chrisanthus
2018-06-12 03:49:05 -07:00
committed by Xie, nanlin
parent 9d4cc5c11d
commit 8d50d40ff8
6 changed files with 11 additions and 12 deletions
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7
hypervisor/boot/dmar_parse.c
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@@ -270,13 +270,6 @@ handle_one_drhd(struct acpi_dmar_hardware_unit *acpi_drhd,
consumed = handle_dmar_devscope(dev_scope, cp, remaining);
if (((drhd->segment << 16) |
(dev_scope->bus << 8) |
dev_scope->devfun) == CONFIG_GPU_SBDF) {
ASSERT(dev_count == 1, "no dedicated iommu for gpu");
drhd->ignore = true;
}
if (consumed <= 0)
break;