linux-kernel - [PATCH 5.15 034/148] iommu/vt-d: Check correct capability for sagaw determination

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Message-Id: <20220926100757.320220944@linuxfoundation.org>
Date:   Mon, 26 Sep 2022 12:11:08 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Raghunathan Srinivasan <raghunathan.srinivasan@...el.com>,
        Yi Liu <yi.l.liu@...el.com>,
        Jerry Snitselaar <jsnitsel@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 5.15 034/148] iommu/vt-d: Check correct capability for sagaw determination

From: Yi Liu <yi.l.liu@...el.com>

commit 154897807050c1161cb2660e502fc0470d46b986 upstream.

Check 5-level paging capability for 57 bits address width instead of
checking 1GB large page capability.

Fixes: 53fc7ad6edf2 ("iommu/vt-d: Correctly calculate sagaw value of IOMMU")
Cc: stable@...r.kernel.org
Reported-by: Raghunathan Srinivasan <raghunathan.srinivasan@...el.com>
Signed-off-by: Yi Liu <yi.l.liu@...el.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>
Reviewed-by: Kevin Tian <kevin.tian@...el.com>
Reviewed-by: Raghunathan Srinivasan <raghunathan.srinivasan@...el.com>
Link: https://lore.kernel.org/r/20220916071212.2223869-2-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/iommu/intel/iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -539,7 +539,7 @@ static unsigned long __iommu_calculate_s
 {
 	unsigned long fl_sagaw, sl_sagaw;
 
-	fl_sagaw = BIT(2) | (cap_fl1gp_support(iommu->cap) ? BIT(3) : 0);
+	fl_sagaw = BIT(2) | (cap_5lp_support(iommu->cap) ? BIT(3) : 0);
 	sl_sagaw = cap_sagaw(iommu->cap);
 
 	/* Second level only. */