From 2bd3e04c3b3c76d573435a299a4d85bad0021a90 Mon Sep 17 00:00:00 2001
From: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Date: Fri, 10 Dec 2010 17:21:14 +0900
Subject: [PATCH] Add function for checking mca broadcast of CPU

Add function for checking whether current CPU support mca broadcast.

Signed-off-by: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
 target-i386/cpu.h    |  1 +
 target-i386/helper.c | 33 +++++++++++++++++++++++++++++++++
 target-i386/kvm.c    |  6 +-----
 3 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index f0c07cde3b..dddcd749cc 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -760,6 +760,7 @@ int cpu_x86_exec(CPUX86State *s);
 void cpu_x86_close(CPUX86State *s);
 void x86_cpu_list (FILE *f, fprintf_function cpu_fprintf, const char *optarg);
 void x86_cpudef_setup(void);
+int cpu_x86_support_mca_broadcast(CPUState *env);
 
 int cpu_get_pic_interrupt(CPUX86State *s);
 /* MSDOS compatibility mode FPU exception support */
diff --git a/target-i386/helper.c b/target-i386/helper.c
index 2cfb4a42a7..6dfa27d51b 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -110,6 +110,32 @@ void cpu_x86_close(CPUX86State *env)
     qemu_free(env);
 }
 
+static void cpu_x86_version(CPUState *env, int *family, int *model)
+{
+    int cpuver = env->cpuid_version;
+
+    if (family == NULL || model == NULL) {
+        return;
+    }
+
+    *family = (cpuver >> 8) & 0x0f;
+    *model = ((cpuver >> 12) & 0xf0) + ((cpuver >> 4) & 0x0f);
+}
+
+/* Broadcast MCA signal for processor version 06H_EH and above */
+int cpu_x86_support_mca_broadcast(CPUState *env)
+{
+    int family = 0;
+    int model = 0;
+
+    cpu_x86_version(env, &family, &model);
+    if ((family == 6 && model >= 14) || family > 6) {
+        return 1;
+    }
+
+    return 0;
+}
+
 /***********************************************************/
 /* x86 debug */
 
@@ -1080,6 +1106,13 @@ void cpu_inject_x86_mce(CPUState *cenv, int bank, uint64_t status,
         return;
     }
 
+    if (broadcast) {
+        if (!cpu_x86_support_mca_broadcast(cenv)) {
+            fprintf(stderr, "Current CPU does not support broadcast\n");
+            return;
+        }
+    }
+
     if (kvm_enabled()) {
         if (broadcast) {
             flag |= MCE_BROADCAST;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8b868ad40a..2115a585ef 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1711,13 +1711,9 @@ static void hardware_memory_error(void)
 static void kvm_mce_broadcast_rest(CPUState *env)
 {
     CPUState *cenv;
-    int family, model, cpuver = env->cpuid_version;
-
-    family = (cpuver >> 8) & 0xf;
-    model = ((cpuver >> 12) & 0xf0) + ((cpuver >> 4) & 0xf);
 
     /* Broadcast MCA signal for processor version 06H_EH and above */
-    if ((family == 6 && model >= 14) || family > 6) {
+    if (cpu_x86_support_mca_broadcast(env)) {
         for (cenv = first_cpu; cenv != NULL; cenv = cenv->next_cpu) {
             if (cenv == env) {
                 continue;
-- 
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