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[03/13] KVM: Add KVM_CAP_PI to detect VT-d Posted-Interrtups

Message ID 1415600812-27773-4-git-send-email-feng.wu@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Wu, Feng Nov. 10, 2014, 6:26 a.m. UTC 
This patch adds KVM_CAP_PI to detect VT-d Posted-Interrtups
feature for QEMU.

Signed-off-by: Feng Wu <feng.wu@intel.com>
---
 arch/x86/kvm/x86.c       |    4 ++++
 include/uapi/linux/kvm.h |    1 +
 2 files changed, 5 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0033df3..b447a98 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -63,6 +63,7 @@ 
 #include <asm/xcr.h>
 #include <asm/pvclock.h>
 #include <asm/div64.h>
+#include <asm/irq_remapping.h>
 
 #define MAX_IO_MSRS 256
 #define KVM_MAX_MCE_BANKS 32
@@ -2775,6 +2776,9 @@  int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_TSC_DEADLINE_TIMER:
 		r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER);
 		break;
+	case KVM_CAP_PI:
+		r = irq_post_enabled;
+		break;
 	default:
 		r = 0;
 		break;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 6076882..7593c52 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -761,6 +761,7 @@  struct kvm_ppc_smmu_info {
 #define KVM_CAP_PPC_FIXUP_HCALL 103
 #define KVM_CAP_PPC_ENABLE_HCALL 104
 #define KVM_CAP_CHECK_EXTENSION_VM 105
+#define KVM_CAP_PI 106
 
 #ifdef KVM_CAP_IRQ_ROUTING