1 files changed, 38 insertions, 17 deletions

diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c
index 08be922de33a..8095f8611f8a 100644
--- a/arch/x86/kernel/cpu/hypervisor.c
+++ b/arch/x86/kernel/cpu/hypervisor.c
@@ -21,37 +21,58 @@
  *
  */
 
+#include <linux/module.h>
 #include <asm/processor.h>
-#include <asm/vmware.h>
 #include <asm/hypervisor.h>
 
-static inline void __cpuinit
-detect_hypervisor_vendor(struct cpuinfo_x86 *c)
+/*
+ * Hypervisor detect order.  This is specified explicitly here because
+ * some hypervisors might implement compatibility modes for other
+ * hypervisors and therefore need to be detected in specific sequence.
+ */
+static const __initconst struct hypervisor_x86 * const hypervisors[] =
 {
-        if (vmware_platform())
-                c->x86_hyper_vendor = X86_HYPER_VENDOR_VMWARE;
-        else
-                c->x86_hyper_vendor = X86_HYPER_VENDOR_NONE;
-}
+        &x86_hyper_vmware,
+        &x86_hyper_ms_hyperv,
+#ifdef CONFIG_XEN_PVHVM
+        &x86_hyper_xen_hvm,
+#endif
+};
 
-static inline void __cpuinit
-hypervisor_set_feature_bits(struct cpuinfo_x86 *c)
+const struct hypervisor_x86 *x86_hyper;
+EXPORT_SYMBOL(x86_hyper);
+
+static inline void __init
+detect_hypervisor_vendor(void)
 {
-        if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE) {
-                vmware_set_feature_bits(c);
-                return;
+        const struct hypervisor_x86 *h, * const *p;
+
+        for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {
+                h = *p;
+                if (h->detect()) {
+                        x86_hyper = h;
+                        printk(KERN_INFO "Hypervisor detected: %s\n", h->name);
+                        break;
+                }
         }
 }
 
 void __cpuinit init_hypervisor(struct cpuinfo_x86 *c)
 {
-        detect_hypervisor_vendor(c);
-        hypervisor_set_feature_bits(c);
+        if (x86_hyper && x86_hyper->set_cpu_features)
+                x86_hyper->set_cpu_features(c);
 }
 
 void __init init_hypervisor_platform(void)
 {
+
+        detect_hypervisor_vendor();
+
+        if (!x86_hyper)
+                return;
+
         init_hypervisor(&boot_cpu_data);
-        if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE)
-                vmware_platform_setup();
+
+        if (x86_hyper->init_platform)
+                x86_hyper->init_platform();
 }