3 files changed, 33 insertions, 7 deletions

diff --git a/arch/alpha/include/asm/percpu.h b/arch/alpha/include/asm/percpu.h
index e9e0bb5a23bf..06c5c7a4afd3 100644
--- a/arch/alpha/include/asm/percpu.h
+++ b/arch/alpha/include/asm/percpu.h
@@ -1,7 +1,9 @@
 #ifndef __ALPHA_PERCPU_H
 #define __ALPHA_PERCPU_H
+
 #include <linux/compiler.h>
 #include <linux/threads.h>
+#include <linux/percpu-defs.h>
 
 /*
  * Determine the real variable name from the name visible in the
@@ -73,6 +75,28 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
 
 #endif /* SMP */
 
-#include <asm-generic/percpu.h>
+#ifdef CONFIG_SMP
+#define PER_CPU_BASE_SECTION ".data.percpu"
+#else
+#define PER_CPU_BASE_SECTION ".data"
+#endif
+
+#ifdef CONFIG_SMP
+
+#ifdef MODULE
+#define PER_CPU_SHARED_ALIGNED_SECTION ""
+#else
+#define PER_CPU_SHARED_ALIGNED_SECTION ".shared_aligned"
+#endif
+#define PER_CPU_FIRST_SECTION ".first"
+
+#else
+
+#define PER_CPU_SHARED_ALIGNED_SECTION ""
+#define PER_CPU_FIRST_SECTION ""
+
+#endif
+
+#define PER_CPU_ATTRIBUTES
 
 #endif /* __ALPHA_PERCPU_H */
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 1821c2078199..1f8510c51d6e 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -411,7 +411,6 @@ static __init int svm_hardware_setup(void)
 
         iopm_va = page_address(iopm_pages);
         memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
-        clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */
         iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
 
         if (boot_cpu_has(X86_FEATURE_NX))
@@ -796,6 +795,11 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
         var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
         var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
 
+        /* AMD's VMCB does not have an explicit unusable field, so emulate it
+         * for cross vendor migration purposes by "not present"
+         */
+        var->unusable = !var->present || (var->type == 0);
+
         switch (seg) {
         case VCPU_SREG_CS:
                 /*
@@ -827,8 +831,6 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
                         var->type |= 0x1;
                 break;
         }
-
-        var->unusable = !var->present;
 }
 
 static int svm_get_cpl(struct kvm_vcpu *vcpu)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7c1ce5ac6131..49079a46687b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1121,9 +1121,9 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 
 static int is_efer_nx(void)
 {
-        u64 efer;
+        unsigned long long efer = 0;
 
-        rdmsrl(MSR_EFER, efer);
+        rdmsrl_safe(MSR_EFER, &efer);
         return efer & EFER_NX;
 }
 
@@ -1259,7 +1259,7 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                 bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
                 bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) |
                 bit(X86_FEATURE_SYSCALL) |
-                (bit(X86_FEATURE_NX) && is_efer_nx()) |
+                (is_efer_nx() ? bit(X86_FEATURE_NX) : 0) |
 #ifdef CONFIG_X86_64
                 bit(X86_FEATURE_LM) |
 #endif