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    Subject[PATCH 5.15 034/148] iommu/vt-d: Check correct capability for sagaw determination
    Date
    From: Yi Liu <yi.l.liu@intel.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@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>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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. */

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