diff options
| author | Jay Cornwall <jay.cornwall@amd.com> | 2014-02-26 15:49:31 -0600 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-04-25 19:01:23 +0200 |
| commit | 8152809394aea1d96e0ebf77700c9e4f2237d04e (patch) | |
| tree | 800e8c853426f2982eda4897d91fe7c947b068b1 /drivers/iommu | |
| parent | d4527ea4815ea643d7d4341ac69efbd528f19c0f (diff) | |
| download | lwn-8152809394aea1d96e0ebf77700c9e4f2237d04e.tar.gz lwn-8152809394aea1d96e0ebf77700c9e4f2237d04e.zip | |
iommu/amd: Fix PASID format in INVALIDATE_IOTLB_PAGES command
commit e8d2d82d4a73f37b3270e4fd19ba83e48b589656 upstream.
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>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/iommu')
| -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 72531f008a5e..5d2edb4b60aa 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); |