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Index: sys/conf/files.amd64
===================================================================
--- sys/conf/files.amd64
+++ sys/conf/files.amd64
@@ -564,6 +564,7 @@
x86/x86/identcpu.c standard
x86/x86/intr_machdep.c standard
x86/x86/io_apic.c standard
+x86/x86/kvm.c standard
x86/x86/legacy.c standard
x86/x86/local_apic.c standard
x86/x86/mca.c standard
Index: sys/conf/files.i386
===================================================================
--- sys/conf/files.i386
+++ sys/conf/files.i386
@@ -582,6 +582,7 @@
x86/x86/identcpu.c standard
x86/x86/intr_machdep.c standard
x86/x86/io_apic.c optional apic
+x86/x86/kvm.c standard
x86/x86/legacy.c optional native
x86/x86/local_apic.c optional apic
x86/x86/mca.c standard
Index: sys/kern/subr_param.c
===================================================================
--- sys/kern/subr_param.c
+++ sys/kern/subr_param.c
@@ -160,6 +160,7 @@
"hv",
"vmware",
"bhyve",
+ "kvm",
NULL
};
CTASSERT(nitems(vm_guest_sysctl_names) - 1 == VM_LAST);
Index: sys/sys/systm.h
===================================================================
--- sys/sys/systm.h
+++ sys/sys/systm.h
@@ -73,7 +73,7 @@
* Keep in sync with vm_guest_sysctl_names[].
*/
enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
- VM_GUEST_VMWARE, VM_GUEST_BHYVE, VM_LAST };
+ VM_GUEST_VMWARE, VM_GUEST_BHYVE, VM_GUEST_KVM, VM_LAST };
#if defined(WITNESS) || defined(INVARIANTS)
void kassert_panic(const char *fmt, ...) __printflike(1, 2);
Index: sys/x86/include/kvm.h
===================================================================
--- /dev/null
+++ sys/x86/include/kvm.h
@@ -0,0 +1,37 @@
+/*-
+ * Copyright (c) 2014 Bryan Venteicher <bryanv@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _X86_KVM_H_
+#define _X86_KVM_H_
+
+#define KVM_CPUID_FEATURES_LEAF 0x40000001
+
+int kvm_paravirt_supported(void);
+uint32_t kvm_get_features(void);
+
+#endif /* !_X86_KVM_H_ */
Index: sys/x86/x86/kvm.c
===================================================================
--- /dev/null
+++ sys/x86/x86/kvm.c
@@ -0,0 +1,83 @@
+/*-
+ * Copyright (c) 2014 Bryan Venteicher <bryanv@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+#include <machine/cpufunc.h>
+
+#include <x86/hypervisor.h>
+#include <x86/kvm.h>
+
+static int kvm_cpuid_identify(void);
+
+static uint32_t kvm_cpuid_base = -1;
+static uint32_t kvm_cpuid_high = -1;
+
+static int
+kvm_cpuid_identify(void)
+{
+
+ if (kvm_cpuid_base == -1) {
+ hypervisor_cpuid_base("KVMKVMKVM\0\0", 0, &kvm_cpuid_base,
+ &kvm_cpuid_high);
+ }
+
+ return (kvm_cpuid_base > 0);
+}
+
+int
+kvm_paravirt_supported(void)
+{
+
+ return (kvm_cpuid_base > 0);
+}
+
+uint32_t
+kvm_get_features(void)
+{
+ u_int regs[4];
+
+ if (kvm_paravirt_supported())
+ do_cpuid(kvm_cpuid_base | KVM_CPUID_FEATURES_LEAF, regs);
+ else
+ regs[0] = 0;
+
+ return (regs[0]);
+}
+
+static void
+kvm_init(void)
+{
+
+ if (kvm_cpuid_identify() != 0)
+ hypervisor_register("KVM", VM_GUEST_KVM, NULL);
+}
+
+HYPERVISOR_SYSINIT(kvm, kvm_init);

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