Commit ec91bb159dc2 for kernel

commit ec91bb159dc24eefe144ef8867937f4a055dd0e2
Author: Dheeraj Kumar Srivastava <dheerajkumar.srivastava@amd.com>
Date:   Thu Nov 5 16:32:16 2026 +0000

    iommu/amd: Clear amd_iommu_snp_en if snp_rmptable_init() fails

    iommu_snp_enable() checks that the IOMMU can support SNP and sets
    amd_iommu_snp_en, then calls snp_rmptable_init() to map the RMP table.
    If that call fails, CC_ATTR_HOST_SEV_SNP is cleared but amd_iommu_snp_en
    is left set. Later IOMMU initialization uses amd_iommu_snp_en to
    configure the IOMMU for SNP, on the assumption that RMP setup succeeded.

    Clear amd_iommu_snp_en along with CC_ATTR_HOST_SEV_SNP.

    Fixes: 409f45387c93 ("x86/sev: Fix broken SNP support with KVM module built-in")
    Signed-off-by: Dheeraj Kumar Srivastava <dheerajkumar.srivastava@amd.com>
    Reviewed-by: Ankit Soni <Ankit.Soni@amd.com>
    Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 0cb9aeb0597b..78c7079dec9d 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -3514,6 +3514,7 @@ static __init void iommu_snp_enable(void)
 	return;

 disable_snp:
+	amd_iommu_snp_en = false;
 	cc_platform_clear(CC_ATTR_HOST_SEV_SNP);
 #endif
 }