diff options
| author | Vasant Hegde <vasant.hegde@amd.com> | 2023-05-18 08:43:51 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-05-23 09:29:25 +0300 |
| commit | 11c439a19466e7feaccdbce148a75372fddaf4e9 (patch) | |
| tree | b1fdc274ac2fb0377d27ccca4997257e809646bf /drivers/iommu | |
| parent | 2212fc2acf3f6ee690ea36506fb882a19d1bfcab (diff) | |
| download | linux-11c439a19466e7feaccdbce148a75372fddaf4e9.tar.xz | |
iommu/amd/pgtbl_v2: Fix domain max address
IOMMU v2 page table supports 4 level (47 bit) or 5 level (56 bit) virtual
address space. Current code assumes it can support 64bit IOVA address
space. If IOVA allocator allocates virtual address > 47/56 bit (depending
on page table level) then it will do wrong mapping and cause invalid
translation.
Hence adjust aperture size to use max address supported by the page table.
Reported-by: Jerry Snitselaar <jsnitsel@redhat.com>
Fixes: aaac38f61487 ("iommu/amd: Initial support for AMD IOMMU v2 page table")
Cc: <Stable@vger.kernel.org> # v6.0+
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20230518054351.9626-1-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 0f3ac4b489d6..dc1ec6849775 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2129,6 +2129,15 @@ out_err: return NULL; } +static inline u64 dma_max_address(void) +{ + if (amd_iommu_pgtable == AMD_IOMMU_V1) + return ~0ULL; + + /* V2 with 4/5 level page table */ + return ((1ULL << PM_LEVEL_SHIFT(amd_iommu_gpt_level)) - 1); +} + static struct iommu_domain *amd_iommu_domain_alloc(unsigned type) { struct protection_domain *domain; @@ -2145,7 +2154,7 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned type) return NULL; domain->domain.geometry.aperture_start = 0; - domain->domain.geometry.aperture_end = ~0ULL; + domain->domain.geometry.aperture_end = dma_max_address(); domain->domain.geometry.force_aperture = true; return &domain->domain; |