[Qemu-devel] [PATCH] x86, mce: broadcast mce depending on the cpu version

[Qemu-devel] [PATCH] x86, mce: broadcast mce depending on the cpu version

[Hidetoshi Seto]

There is no reason why SRAO event received by the main thread
is the only one that being broadcasted.

According to the x86 ASDM vol.3A 15.10.4.1,
MCE signal is broadcast on processor version 06H_EH or later.

This change is required to handle SRAR in smp guests.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
---
 target-i386/kvm.c |   29 ++++++++++++++++++++++++-----
 1 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index a0d0603..00bb083 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1637,6 +1637,28 @@ static void hardware_memory_error(void)
     exit(1);
 }
 
+#ifdef KVM_CAP_MCE
+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 (cenv == env) {
+            continue;
+        }
+        for (cenv = first_cpu; cenv != NULL; cenv = cenv->next_cpu) {
+            kvm_inject_x86_mce(cenv, 1, MCI_STATUS_VAL | MCI_STATUS_UC,
+                               MCG_STATUS_MCIP | MCG_STATUS_RIPV, 0, 0, 1);
+        }
+    }
+}
+#endif
+
 int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
 {
 #if defined(KVM_CAP_MCE)
@@ -1694,6 +1716,7 @@ int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
             fprintf(stderr, "kvm_set_mce: %s\n", strerror(errno));
             abort();
         }
+        kvm_mce_broadcast_rest(env);
     } else
 #endif
     {
@@ -1716,7 +1739,6 @@ int kvm_on_sigbus(int code, void *addr)
         void *vaddr;
         ram_addr_t ram_addr;
         target_phys_addr_t paddr;
-        CPUState *cenv;
 
         /* Hope we are lucky for AO MCE */
         vaddr = addr;
@@ -1732,10 +1754,7 @@ int kvm_on_sigbus(int code, void *addr)
         kvm_inject_x86_mce(first_cpu, 9, status,
                            MCG_STATUS_MCIP | MCG_STATUS_RIPV, paddr,
                            (MCM_ADDR_PHYS << 6) | 0xc, 1);
-        for (cenv = first_cpu->next_cpu; cenv != NULL; cenv = cenv->next_cpu) {
-            kvm_inject_x86_mce(cenv, 1, MCI_STATUS_VAL | MCI_STATUS_UC,
-                               MCG_STATUS_MCIP | MCG_STATUS_RIPV, 0, 0, 1);
-        }
+        kvm_mce_broadcast_rest(first_cpu);
     } else
 #endif
     {
-- 
1.6.5.2

[Qemu-devel] Re: [PATCH] x86, mce: broadcast mce depending on the cpu version

[Marcelo Tosatti]

On Thu, Oct 21, 2010 at 05:47:06PM +0900, Hidetoshi Seto wrote:
> There is no reason why SRAO event received by the main thread
> is the only one that being broadcasted.
> 
> According to the x86 ASDM vol.3A 15.10.4.1,
> MCE signal is broadcast on processor version 06H_EH or later.
> 
> This change is required to handle SRAR in smp guests.
> 
> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
> ---
>  target-i386/kvm.c |   29 ++++++++++++++++++++++++-----
>  1 files changed, 24 insertions(+), 5 deletions(-)

Applied all to uq/master, thanks.