x86, cpu: Use AMD errata checking framework for erratum 383

Use the AMD errata checking framework instead of open-coding the test.
Signed-off-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
LKML-Reference: <1280336972-865982-3-git-send-email-hans.rosenfeld@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/include/asm/processor.h

@@ -1029,6 +1029,7 @@ unsigned long calc_aperfmperf_ratio(struct aperfmperf *old,
  * AMD errata checking
  */
 #ifdef CONFIG_CPU_SUP_AMD
+extern const int amd_erratum_383[];
 extern const int amd_erratum_400[];
 extern bool cpu_has_amd_erratum(const int *);
 

arch/x86/kernel/cpu/amd.c

@@ -632,6 +632,8 @@ const int amd_erratum_400[] =
 	AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0xf, 0x41, 0x2, 0xff, 0xf),
 			    AMD_MODEL_RANGE(0x10, 0x2, 0x1, 0xff, 0xf));
 
+const int amd_erratum_383[] =
+	AMD_OSVW_ERRATUM(3, AMD_MODEL_RANGE(0x10, 0, 0, 0xff, 0xf));
 
 bool cpu_has_amd_erratum(const int *erratum)
 {

arch/x86/kvm/svm.c

@@ -383,8 +383,7 @@ static void svm_init_erratum_383(void)
 	int err;
 	u64 val;
 
-	/* Only Fam10h is affected */
-	if (boot_cpu_data.x86 != 0x10)
+	if (!cpu_has_amd_erratum(amd_erratum_383))
 		return;
 
 	/* Use _safe variants to not break nested virtualization */