github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-07-04 11:07:51 +00:00
Code Issues Projects Releases Wiki Activity

hv:refine comment about intel integrated gpu dmar

Browse Source 
The dedicated DMAR unit for Intel integrated GPU
shall be available on the physical platform.
So remove the assert and add application constraint
in handle_one_drhd func.

Tracked-On: #4405

Signed-off-by: Junming Liu <junming.liu@intel.com>
Reviewed-by: Wu Binbin <binbin.wu@intel.com>
Reviewed-by: Wu Xiangyang <xiangyang.wu@linux.intel.com>
This commit is contained in:
Junming Liu 2020-02-26 09:55:51 +00:00 committed by wenlingz
parent 3098c4937b
commit 96f92373cd
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
hypervisor/acpi_parser/dmar_parse.c
View File

@ -176,6 +176,10 @@ get_drhd_dev_scope_cnt(struct acpi_dmar_hardware_unit *drhd)
return count; return count;
} }
/**
* @Application constraint: The dedicated DMAR unit for Intel integrated GPU
* shall be available on the physical platform.
*/
static int32_t static int32_t
handle_one_drhd(struct acpi_dmar_hardware_unit *acpi_drhd, handle_one_drhd(struct acpi_dmar_hardware_unit *acpi_drhd,
struct dmar_drhd *drhd) struct dmar_drhd *drhd)
@ -210,7 +214,6 @@ handle_one_drhd(struct acpi_dmar_hardware_unit *acpi_drhd,
if (((drhd->segment << 16U) | if (((drhd->segment << 16U) |
(dev_scope->bus << 8U) | (dev_scope->bus << 8U) |
dev_scope->devfun) == CONFIG_GPU_SBDF) { dev_scope->devfun) == CONFIG_GPU_SBDF) {
ASSERT(dev_count == 1, "no dedicated iommu for gpu");
drhd->ignore = true; drhd->ignore = true;
} }
} }