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: 53fc7ad ("iommu/vt-d: Correctly calculate sagaw value of IOMMU")
Cc: [email protected]
Reported-by: Raghunathan Srinivasan <[email protected]>
Signed-off-by: Yi Liu <[email protected]>
Reviewed-by: Jerry Snitselaar <[email protected]>
Reviewed-by: Kevin Tian <[email protected]>
Reviewed-by: Raghunathan Srinivasan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>

Author: yiliu1765

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. */