linux-kernel - [PATCH] iommu/vt-d: Fix PASID cache flush

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Message-Id: <1585610725-78316-1-git-send-email-jacob.jun.pan@linux.intel.com>
Date:   Mon, 30 Mar 2020 16:25:25 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        "Lu Baolu" <baolu.lu@...ux.intel.com>
Cc:     Raj Ashok <ashok.raj@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Eric Auger <eric.auger@...hat.com>
Subject: [PATCH] iommu/vt-d: Fix PASID cache flush

PASID cache type and shift of granularity bits are missing in
the current code.

Fixes: 6f7db75e1c46 ("iommu/vt-d: Add second level page table
interface")

Cc: Eric Auger <eric.auger@...hat.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
---
 drivers/iommu/intel-pasid.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
index 22b30f10b396..57d05b0fbafc 100644
--- a/drivers/iommu/intel-pasid.c
+++ b/drivers/iommu/intel-pasid.c
@@ -365,7 +365,8 @@ pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu,
 {
 	struct qi_desc desc;
 
-	desc.qw0 = QI_PC_DID(did) | QI_PC_PASID_SEL | QI_PC_PASID(pasid);
+	desc.qw0 = QI_PC_DID(did) | QI_PC_GRAN(QI_PC_PASID_SEL) |
+		   QI_PC_PASID(pasid) | QI_PC_TYPE;
 	desc.qw1 = 0;
 	desc.qw2 = 0;
 	desc.qw3 = 0;
-- 
2.7.4