KVM: SVM: move has_svm() code to asm/virtext.h

Use a trick to keep the printk()s on has_svm() working as before. gcc
will take care of not generating code for the 'msg' stuff when the
function is called with a NULL msg argument.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 5 insertions, 14 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index f0ad4d4217e4..0667c6d13d30 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -28,6 +28,8 @@
 
 #include <asm/desc.h>
 
+#include <asm/virtext.h>
+
 #define __ex(x) __kvm_handle_fault_on_reboot(x)
 
 MODULE_AUTHOR("Qumranet");
@@ -245,24 +247,13 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
 
 static int has_svm(void)
 {
-        uint32_t eax, ebx, ecx, edx;
-
-        if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
-                printk(KERN_INFO "has_svm: not amd\n");
-                return 0;
-        }
+        const char *msg;
 
-        cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
-        if (eax < SVM_CPUID_FUNC) {
-                printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
+        if (!cpu_has_svm(&msg)) {
+                printk(KERN_INFO "has_svn: %s\n", msg);
                 return 0;
         }
 
-        cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
-        if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
-                printk(KERN_DEBUG "has_svm: svm not available\n");
-                return 0;
-        }
         return 1;
 }