diff options
Diffstat (limited to 'hw/i386')
| -rw-r--r-- | hw/i386/intel_iommu.c | 4 | ||||
| -rw-r--r-- | hw/i386/intel_iommu_internal.h | 3 |
2 files changed, 7 insertions, 0 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 4806d7edb4..26cc731c7b 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2659,6 +2659,7 @@ static Property vtd_properties[] = { DEFINE_PROP_UINT8("x-aw-bits", IntelIOMMUState, aw_bits, VTD_HOST_ADDRESS_WIDTH), DEFINE_PROP_BOOL("caching-mode", IntelIOMMUState, caching_mode, FALSE), + DEFINE_PROP_BOOL("dma-drain", IntelIOMMUState, dma_drain, true), DEFINE_PROP_END_OF_LIST(), }; @@ -3147,6 +3148,9 @@ static void vtd_init(IntelIOMMUState *s) s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND | VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS | VTD_CAP_SAGAW_39bit | VTD_CAP_MGAW(s->aw_bits); + if (s->dma_drain) { + s->cap |= VTD_CAP_DRAIN; + } if (s->aw_bits == VTD_HOST_AW_48BIT) { s->cap |= VTD_CAP_SAGAW_48bit; } diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h index d084099ed9..00e9edbc66 100644 --- a/hw/i386/intel_iommu_internal.h +++ b/hw/i386/intel_iommu_internal.h @@ -203,6 +203,9 @@ #define VTD_CAP_MAMV (VTD_MAMV << 48) #define VTD_CAP_PSI (1ULL << 39) #define VTD_CAP_SLLPS ((1ULL << 34) | (1ULL << 35)) +#define VTD_CAP_DRAIN_WRITE (1ULL << 54) +#define VTD_CAP_DRAIN_READ (1ULL << 55) +#define VTD_CAP_DRAIN (VTD_CAP_DRAIN_READ | VTD_CAP_DRAIN_WRITE) #define VTD_CAP_CM (1ULL << 7) /* Supported Adjusted Guest Address Widths */ |