iommu/vt-d: Check correct capability for sagaw determination

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@vger.kernel.org
Reported-by: Raghunathan Srinivasan <raghunathan.srinivasan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Raghunathan Srinivasan <raghunathan.srinivasan@intel.com>
Link: https://lore.kernel.org/r/20220916071212.2223869-2-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 64d3089..31bc50e 100644 (file)
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -399,7 +399,7 @@ static unsigned long __iommu_calculate_sagaw(struct intel_iommu *iommu)
 {
        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. */