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| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-07-14 01:56:47 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-07-15 11:41:03 +0300 |
| commit | 02c6f31d0e010a7eef849ca6457e5801de2b42d1 (patch) | |
| tree | 3e31dcfc1abfb1f686ce8b290f74e2ccc71f6dc7 /drivers/iommu | |
| parent | ae180ba42662afe2ed7620bdb863c7c6b61f6f2d (diff) | |
| download | linux-02c6f31d0e010a7eef849ca6457e5801de2b42d1.tar.xz | |
iommu/amd: Globally detect SNP support
Modify existing SNP feature check to use the helper function
check_feature_on_all_iommus() to ensure consistency among all IOMMUs.
Also report IOMMU SNP support information for each IOMMU.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20220713225651.20758-6-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd/init.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 371f0b276696..7c6e61451ff7 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -389,7 +389,7 @@ static void iommu_set_cwwb_range(struct amd_iommu *iommu) u64 start = iommu_virt_to_phys((void *)iommu->cmd_sem); u64 entry = start & PM_ADDR_MASK; - if (!iommu_feature(iommu, FEATURE_SNP)) + if (!check_feature_on_all_iommus(FEATURE_SNP)) return; /* Note: @@ -804,7 +804,7 @@ static void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu, void *buf = (void *)__get_free_pages(gfp, order); if (buf && - iommu_feature(iommu, FEATURE_SNP) && + check_feature_on_all_iommus(FEATURE_SNP) && set_memory_4k((unsigned long)buf, (1 << order))) { free_pages((unsigned long)buf, order); buf = NULL; @@ -2143,6 +2143,9 @@ static void print_iommu_info(void) if (iommu->features & FEATURE_GAM_VAPIC) pr_cont(" GA_vAPIC"); + if (iommu->features & FEATURE_SNP) + pr_cont(" SNP"); + pr_cont("\n"); } } |