KVM: Add x86_hyper_kvm to complete detect_hypervisor_platform check

While debugging I noticed that unlike all the other hypervisor code in the kernel, kvm does not have an entry for x86_hyper which is used in detect_hypervisor_platform() which results in a nice printk in the syslog. This is only really a stub function but it does make kvm more consistent with the other hypervisors. Signed-off-by: Prarit Bhargava <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Gleb Natapov <[email protected]> Cc: Alex Williamson <[email protected]> Cc: Konrad Rzeszutek Wilk <[email protected]> Cc: Marcelo Tostatti <[email protected]> Cc: [email protected] Signed-off-by: Avi Kivity <[email protected]>
kazikcz · Jul 11, 2012 · fc73373 · fc73373
1 parent 58d8b17
commit fc73373
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diff --git a/arch/x86/include/asm/hypervisor.h b/arch/x86/include/asm/hypervisor.h
@@ -49,6 +49,7 @@ extern const struct hypervisor_x86 *x86_hyper;
 extern const struct hypervisor_x86 x86_hyper_vmware;
 extern const struct hypervisor_x86 x86_hyper_ms_hyperv;
 extern const struct hypervisor_x86 x86_hyper_xen_hvm;
+extern const struct hypervisor_x86 x86_hyper_kvm;
 
 static inline bool hypervisor_x2apic_available(void)
 {

diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c
@@ -37,6 +37,7 @@ static const __initconst struct hypervisor_x86 * const hypervisors[] =
 #endif
 	&x86_hyper_vmware,
 	&x86_hyper_ms_hyperv,
+	&x86_hyper_kvm,
 };
 
 const struct hypervisor_x86 *x86_hyper;

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
@@ -41,6 +41,7 @@
 #include <asm/idle.h>
 #include <asm/apic.h>
 #include <asm/apicdef.h>
+#include <asm/hypervisor.h>
 
 static int kvmapf = 1;
 
@@ -483,6 +484,19 @@ void __init kvm_guest_init(void)
 #endif
 }
 
+static bool __init kvm_detect(void)
+{
+	if (!kvm_para_available())
+		return false;
+	return true;
+}
+
+const struct hypervisor_x86 x86_hyper_kvm __refconst = {
+	.name			= "KVM",
+	.detect			= kvm_detect,
+};
+EXPORT_SYMBOL_GPL(x86_hyper_kvm);
+
 static __init int activate_jump_labels(void)
 {
 	if (has_steal_clock) {