From: Peter Xu <pet...@redhat.com>
Enable IR in IOMMU Extended Capability register.
Signed-off-by: Peter Xu <pet...@redhat.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
hw/i386/intel_iommu_internal.h | 2 ++
hw/i386/intel_iommu.c | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index b648e69..5b98a11 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -176,6 +176,8 @@
/* (offset >> 4) << 8 */
#define VTD_ECAP_IRO (DMAR_IOTLB_REG_OFFSET << 4)
#define VTD_ECAP_QI (1ULL << 1)
+/* Interrupt Remapping support */
+#define VTD_ECAP_IR (1ULL << 3)
/* CAP_REG */
/* (offset >> 4) << 24 */
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 26e322a..9c7a084 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1956,6 +1956,8 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s,
PCIBus *bus, int devfn)
*/
static void vtd_init(IntelIOMMUState *s)
{
+ X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s);
+
memset(s->csr, 0, DMAR_REG_SIZE);
memset(s->wmask, 0, DMAR_REG_SIZE);
memset(s->w1cmask, 0, DMAR_REG_SIZE);
@@ -1977,6 +1979,10 @@ static void vtd_init(IntelIOMMUState *s)
VTD_CAP_SAGAW | VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS;
s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO;
+ if (x86_iommu->intr_supported) {
+ s->ecap |= VTD_ECAP_IR;
+ }
+
vtd_reset_context_cache(s);
vtd_reset_iotlb(s);
--
MST
