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| author | Vasant Hegde <vasant.hegde@amd.com> | 2024-05-30 10:11:18 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-06-04 14:59:52 +0300 |
| commit | 48dc345a23b984c457d1c5878168d026c500618f (patch) | |
| tree | 37fc18b53e4fb0c336ee355ad690d06796f6e444 /drivers | |
| parent | 998a0a362b0b4cf501161c3319e6994d37c45a8c (diff) | |
| download | linux-48dc345a23b984c457d1c5878168d026c500618f.tar.xz | |
iommu/amd: Check EFR[EPHSup] bit before enabling PPR
Check for EFR[EPHSup] bit before enabling PPR. This bit must be set
to enable PPR.
Reported-by: Borislav Petkov <bp@alien8.de>
Fixes: c4cb23111103 ("iommu/amd: Add support for enable/disable IOPF")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218900
Tested-by: Borislav Petkov <bp@alien8.de>
Tested-by: Jean-Christophe Guillain <jean-christophe@guillain.net>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20240530071118.10297-1-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/amd/amd_iommu.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h index 2fde1302a584..2d5945c982bd 100644 --- a/drivers/iommu/amd/amd_iommu.h +++ b/drivers/iommu/amd/amd_iommu.h @@ -129,7 +129,8 @@ static inline int check_feature_gpt_level(void) static inline bool amd_iommu_gt_ppr_supported(void) { return (check_feature(FEATURE_GT) && - check_feature(FEATURE_PPR)); + check_feature(FEATURE_PPR) && + check_feature(FEATURE_EPHSUP)); } static inline u64 iommu_virt_to_phys(void *vaddr) |