diff mbox

[04/13] intel_iommu: set IR bit for ECAP register

Message ID 1455852618-5224-5-git-send-email-peterx@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Peter Xu Feb. 19, 2016, 3:30 a.m. UTC 
Enable IR in IOMMU Extended Capability register.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 hw/i386/intel_iommu.c          | 4 ++++
 hw/i386/intel_iommu_internal.h | 2 ++
 2 files changed, 6 insertions(+)
diff mbox

Patch

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 4b0558e..79585d2 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1961,6 +1961,10 @@  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 (s->intr_supported) {
+        s->ecap |= VTD_ECAP_IR;
+    }
+
     vtd_reset_context_cache(s);
     vtd_reset_iotlb(s);
 
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 */