diff options
| -rw-r--r-- | drivers/iommu/amd/amd_iommu_types.h | 7 | ||||
| -rw-r--r-- | drivers/iommu/amd/init.c | 11 |
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index 3c1205ba636a..5b1019dab328 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -103,6 +103,12 @@ #define FEATURE_GLXVAL_SHIFT 14 #define FEATURE_GLXVAL_MASK (0x03ULL << FEATURE_GLXVAL_SHIFT) +/* Extended Feature 2 Bits */ +#define FEATURE_SNPAVICSUP_SHIFT 5 +#define FEATURE_SNPAVICSUP_MASK (0x07ULL << FEATURE_SNPAVICSUP_SHIFT) +#define FEATURE_SNPAVICSUP_GAM(x) \ + ((x & FEATURE_SNPAVICSUP_MASK) >> FEATURE_SNPAVICSUP_SHIFT == 0x1) + /* Note: * The current driver only support 16-bit PASID. * Currently, hardware only implement upto 16-bit PASID @@ -165,6 +171,7 @@ #define CONTROL_GAINT_EN 29 #define CONTROL_XT_EN 50 #define CONTROL_INTCAPXT_EN 51 +#define CONTROL_SNPAVIC_EN 61 #define CTRL_INV_TO_MASK (7 << CONTROL_INV_TIMEOUT) #define CTRL_INV_TO_NONE 0 diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 4cd94d716122..6bbaf6b971e8 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -2794,13 +2794,22 @@ static void enable_iommus_vapic(void) return; } - /* Enabling GAM support */ + if (amd_iommu_snp_en && + !FEATURE_SNPAVICSUP_GAM(amd_iommu_efr2)) { + pr_warn("Force to disable Virtual APIC due to SNP\n"); + amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY_GA; + return; + } + + /* Enabling GAM and SNPAVIC support */ for_each_iommu(iommu) { if (iommu_init_ga_log(iommu) || iommu_ga_log_enable(iommu)) return; iommu_feature_enable(iommu, CONTROL_GAM_EN); + if (amd_iommu_snp_en) + iommu_feature_enable(iommu, CONTROL_SNPAVIC_EN); } amd_iommu_irq_ops.capability |= (1 << IRQ_POSTING_CAP); |