2 files changed, 15 insertions, 1 deletions

diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index 85574b7c1bc1..1fecb7e61130 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -57,7 +57,8 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
         u16 intercept_dr_write;
         u32 intercept_exceptions;
         u64 intercept;
-        u8 reserved_1[44];
+        u8 reserved_1[42];
+        u16 pause_filter_count;
         u64 iopm_base_pa;
         u64 msrpm_base_pa;
         u64 tsc_offset;
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 69610c5d6dea..170b2d9c6909 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -46,6 +46,7 @@ MODULE_LICENSE("GPL");
 #define SVM_FEATURE_NPT  (1 << 0)
 #define SVM_FEATURE_LBRV (1 << 1)
 #define SVM_FEATURE_SVML (1 << 2)
+#define SVM_FEATURE_PAUSE_FILTER (1 << 10)
 
 #define NESTED_EXIT_HOST        0       /* Exit handled on host level */
 #define NESTED_EXIT_DONE        1       /* Exit caused nested vmexit  */
@@ -654,6 +655,11 @@ static void init_vmcb(struct vcpu_svm *svm)
         svm->nested.vmcb = 0;
         svm->vcpu.arch.hflags = 0;
 
+        if (svm_has(SVM_FEATURE_PAUSE_FILTER)) {
+                control->pause_filter_count = 3000;
+                control->intercept |= (1ULL << INTERCEPT_PAUSE);
+        }
+
         enable_gif(svm);
 }
 
@@ -2281,6 +2287,12 @@ static int interrupt_window_interception(struct vcpu_svm *svm)
         return 1;
 }
 
+static int pause_interception(struct vcpu_svm *svm)
+{
+        kvm_vcpu_on_spin(&(svm->vcpu));
+        return 1;
+}
+
 static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
         [SVM_EXIT_READ_CR0]                     = emulate_on_interception,
         [SVM_EXIT_READ_CR3]                     = emulate_on_interception,
@@ -2316,6 +2328,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
         [SVM_EXIT_CPUID]                        = cpuid_interception,
         [SVM_EXIT_IRET]                         = iret_interception,
         [SVM_EXIT_INVD]                         = emulate_on_interception,
+        [SVM_EXIT_PAUSE]                        = pause_interception,
         [SVM_EXIT_HLT]                          = halt_interception,
         [SVM_EXIT_INVLPG]                       = invlpg_interception,
         [SVM_EXIT_INVLPGA]                      = invlpga_interception,