From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Zenghui Yu yuzenghui@huawei.com
[ Upstream commit 444d66a23c1f1e4c4d12aed4812681d0ad835d60 ]
As per Intel vt-d spec, Rev 3.0 (section 10.4.45 "Virtual Command Response Register"), the status code of "No PASID available" error in response to the Allocate PASID command is 2, not 1. The same for "Invalid PASID" error in response to the Free PASID command.
We will otherwise see confusing kernel log under the command failure from guest side. Fix it.
Fixes: 24f27d32ab6b ("iommu/vt-d: Enlightened PASID allocation") Signed-off-by: Zenghui Yu yuzenghui@huawei.com Acked-by: Lu Baolu baolu.lu@linux.intel.com Link: https://lore.kernel.org/r/20210227073909.432-1-yuzenghui@huawei.com Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/intel/pasid.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/intel/pasid.h b/drivers/iommu/intel/pasid.h index 97dfcffbf495..444c0bec221a 100644 --- a/drivers/iommu/intel/pasid.h +++ b/drivers/iommu/intel/pasid.h @@ -30,8 +30,8 @@ #define VCMD_VRSP_IP 0x1 #define VCMD_VRSP_SC(e) (((e) >> 1) & 0x3) #define VCMD_VRSP_SC_SUCCESS 0 -#define VCMD_VRSP_SC_NO_PASID_AVAIL 1 -#define VCMD_VRSP_SC_INVALID_PASID 1 +#define VCMD_VRSP_SC_NO_PASID_AVAIL 2 +#define VCMD_VRSP_SC_INVALID_PASID 2 #define VCMD_VRSP_RESULT_PASID(e) (((e) >> 8) & 0xfffff) #define VCMD_CMD_OPERAND(e) ((e) << 8) /*