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[xen staging] xen/arm: smmuv1: Set privileged attr to 'default'

commit bb11edcec1a953ce590da797b0d005cd60f21e83
Author:     Rahul Singh <rahul.singh@xxxxxxx>
AuthorDate: Fri Jun 25 17:37:27 2021 +0100
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Fri Jun 25 14:54:17 2021 -0700

    xen/arm: smmuv1: Set privileged attr to 'default'
    Backport commit e19898077cfb642fe151ba22981e795c74d9e114
    "iommu/arm-smmu: Set privileged attribute to 'default' instead of
    Original commit message:
        Currently the driver sets all the device transactions privileges
        to UNPRIVILEGED, but there are cases where the iommu masters wants
        to isolate privileged supervisor and unprivileged user.
        So don't override the privileged setting to unprivileged, instead
        set it to default as incoming and let it be controlled by the
        pagetable settings.
        Acked-by: Will Deacon <will.deacon@xxxxxxx>
        Signed-off-by: Sricharan R <sricharan@xxxxxxxxxxxxxx>
        Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
    Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Tested-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
 xen/drivers/passthrough/arm/smmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/drivers/passthrough/arm/smmu.c 
index 05c2d238b3..da2cd457d7 100644
--- a/xen/drivers/passthrough/arm/smmu.c
+++ b/xen/drivers/passthrough/arm/smmu.c
@@ -1567,7 +1567,7 @@ static int arm_smmu_domain_add_master(struct 
arm_smmu_domain *smmu_domain,
                s2cr[idx].type = type ;
-               s2cr[idx].privcfg = S2CR_PRIVCFG_UNPRIV;
+               s2cr[idx].privcfg = S2CR_PRIVCFG_DEFAULT;
                s2cr[idx].cbndx = cbndx;
                arm_smmu_write_s2cr(smmu, idx);
generated by git-patchbot for /home/xen/git/xen.git#staging



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