From: Jay Cornwall <jay.cornw...@amd.com> 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.cornw...@amd.com> Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com> --- drivers/iommu/amd_iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index faf0da4..1dd9f81 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); -- 1.8.1.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu