iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iommu/amd: Enable Guest Translation before registering devices

Browse Source 
IOMMU Guest Translation (GT) feature needs to be enabled before
invalidating guest translations (CMD_INV_IOMMU_PAGES with GN=1).

Currently GT feature is enabled after setting up interrupt handler.
So far it was fine as we were not invalidating guest page table
before this point.

Upcoming series will introduce per device GCR3 table and it will
invalidate guest pages after configuring. Hence move GT feature
enablement to early_enable_iommu().

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240205115615.6053-3-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2024-02-05 11:56:00 +00:00 committed by Joerg Roedel
parent a6ffb9b3d7
commit 8e01797331
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/iommu/amd/init.c
View File

@ -2769,6 +2769,7 @@ static void early_enable_iommu(struct amd_iommu *iommu)
iommu_enable_command_buffer(iommu);
iommu_enable_event_buffer(iommu);
iommu_set_exclusion_range(iommu);
iommu_enable_gt(iommu);
iommu_enable_ga(iommu);
iommu_enable_xt(iommu);
iommu_enable_irtcachedis(iommu);
@ -2825,6 +2826,7 @@ static void early_enable_iommus(void)
iommu_disable_irtcachedis(iommu);
iommu_enable_command_buffer(iommu);
iommu_enable_event_buffer(iommu);
iommu_enable_gt(iommu);
iommu_enable_ga(iommu);
iommu_enable_xt(iommu);
iommu_enable_irtcachedis(iommu);
@ -2838,10 +2840,8 @@ static void enable_iommus_v2(void)
{
struct amd_iommu *iommu;
for_each_iommu(iommu) {
for_each_iommu(iommu)
iommu_enable_ppr_log(iommu);
iommu_enable_gt(iommu);
}
}
static void enable_iommus_vapic(void)