[PATCH 1/5] qemu-kvm: Add kvm_enable_cap() interface for x86

[Sheng Yang <sheng@linux.intel.com>]

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
 qemu-kvm.c |   16 ++++++++++++++++
 qemu-kvm.h |    8 ++++++++
 2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/qemu-kvm.c b/qemu-kvm.c
index 733d0a9..fbb68f6 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -540,6 +540,22 @@ int kvm_set_xcrs(CPUState *env, struct kvm_xcrs *xcrs)
 }
 #endif
 
+#ifdef KVM_CAP_ENABLE_CAP
+int kvm_enable_cap(CPUState *env, uint32_t cap)
+{
+    int r = 0;
+    struct kvm_enable_cap enable_cap = {
+        .cap = cap,
+        .flags = 0,
+    };
+
+    r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_ENABLE_CAP);
+    if (r > 0)
+	    r = kvm_vcpu_ioctl(env, KVM_ENABLE_CAP, &enable_cap);
+    return r;
+}
+#endif
+
 static int handle_mmio(CPUState *env)
 {
     unsigned long addr = env->kvm_run->mmio.phys_addr;
diff --git a/qemu-kvm.h b/qemu-kvm.h
index 9c08ab4..5cac0c2 100644
--- a/qemu-kvm.h
+++ b/qemu-kvm.h
@@ -316,6 +316,14 @@ int kvm_get_xcrs(CPUState *env, struct kvm_xcrs *xcrs);
 int kvm_set_xcrs(CPUState *env, struct kvm_xcrs *xcrs);
 #endif
 
+#ifdef KVM_ENABLE_CAP
+/*!
+ *  * \brief Enable specific capability of KVM
+ *
+ */
+int kvm_enable_cap(CPUState *env, uint32_t cap);
+#endif
+
 /*!
  * \brief Simulate an external vectored interrupt
  *
-- 
1.7.0.1