Commit 444d66a2 authored by Zenghui Yu's avatar Zenghui Yu Committed by Joerg Roedel
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iommu/vt-d: Fix status code for Allocate/Free PASID command 



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: 24f27d32 ("iommu/vt-d: Enlightened PASID allocation")
Signed-off-by: default avatarZenghui Yu <yuzenghui@huawei.com>
Acked-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210227073909.432-1-yuzenghui@huawei.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 82c3cefb

drivers/iommu/intel/pasid.h

+2 −2
Original line number Diff line number Diff line
@@ -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)

/*