diff options
| author | Jay Cornwall <jay.cornwall@amd.com> | 2014-02-26 15:49:31 -0600 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2014-03-04 15:10:17 +0100 |
| commit | e8d2d82d4a73f37b3270e4fd19ba83e48b589656 (patch) | |
| tree | a083051537cfaca0a2dfcb81d366c11efb45e043 /drivers/iommu/amd_iommu.c | |
| parent | 0414855fdc4a40da05221fc6062cccbc0c30f169 (diff) | |
| download | linux-e8d2d82d4a73f37b3270e4fd19ba83e48b589656.tar.bz2 | |
iommu/amd: Fix PASID format in INVALIDATE_IOTLB_PAGES command
This patch corrects the PASID format in the INVALIDATE_IOTLB_PAGES
command, which was caused by incorrect information in
the AMD IOMMU Architectural Specification v2.01 document.
Incorrect format:
cmd->data[0][16:23] = PASID[7:0]
cmd->data[1][16:27] = PASID[19:8]
Correct format:
cmd->data[0][16:23] = PASID[15:8]
cmd->data[1][16:23] = PASID[7:0]
However, this does not affect the IOMMUv2 hardware implementation,
and has been corrected since version 2.02 of the specification
(available through AMD NDA).
Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index faf0da4bb3a2..1dd9f818fc84 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -982,10 +982,10 @@ static void build_inv_iotlb_pasid(struct iommu_cmd *cmd, u16 devid, int pasid, address &= ~(0xfffULL); cmd->data[0] = devid; - cmd->data[0] |= (pasid & 0xff) << 16; + cmd->data[0] |= ((pasid >> 8) & 0xff) << 16; cmd->data[0] |= (qdep & 0xff) << 24; cmd->data[1] = devid; - cmd->data[1] |= ((pasid >> 8) & 0xfff) << 16; + cmd->data[1] |= (pasid & 0xff) << 16; cmd->data[2] = lower_32_bits(address); cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK; cmd->data[3] = upper_32_bits(address); |