diff mbox

[v7,25/25] intel_iommu: support all masks in interrupt entry cache invalidation

Message ID 1463469353-25642-26-git-send-email-peterx@redhat.com
State New
Headers show

Commit Message

Peter Xu May 17, 2016, 7:15 a.m. UTC 
From: Radim Krčmář <rkrcmar@redhat.com>

Linux guests do not gracefully handle cases when the invalidation mask
they wanted is not supported, probably because real hardware always
allowed all.

We can just say that all 16 masks are supported, because both
ioapic_iec_notifier and kvm_update_msi_routes_all invalidate all caches.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
---
 hw/i386/intel_iommu.c          | 2 +-
 hw/i386/intel_iommu_internal.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 0e340b9..56e2975 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2353,7 +2353,7 @@  static void vtd_init(IntelIOMMUState *s)
     s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO;
 
     if (ms->iommu_intr) {
-        s->ecap |= VTD_ECAP_IR | VTD_ECAP_EIM;
+        s->ecap |= VTD_ECAP_IR | VTD_ECAP_EIM | VTD_ECAP_MHMV;
     }
 
     vtd_reset_context_cache(s);
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 72b0114..0829a50 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -186,6 +186,7 @@ 
 /* Interrupt Remapping support */
 #define VTD_ECAP_IR                 (1ULL << 3)
 #define VTD_ECAP_EIM                (1ULL << 4)
+#define VTD_ECAP_MHMV               (15ULL << 20)
 
 /* CAP_REG */
 /* (offset >> 4) << 24 */