Re: [Qemu-devel] [BUGFIX] MCE: Fix bug of IA32_MCG_STATUS after system reset
On 01/05/2010 02:32 AM, Huang Ying wrote: Now, if we inject a fatal MCE into guest OS, for example Linux, Linux will go panic and then reboot. But if we inject another MCE now, system will reset directly instead of go panic firstly, because MCG_STATUS.MCIP is set to 1 and not cleared after reboot. This is does not follow the behavior in real hardware. This patch fixes this via set env-mcg_status to 0 during system reset. Signed-off-by: Huang Yingying.hu...@intel.com Applied. Thanks. Regards, Anthony Liguori --- target-i386/helper.c |2 ++ 1 file changed, 2 insertions(+) --- a/target-i386/helper.c +++ b/target-i386/helper.c @@ -617,6 +617,8 @@ void cpu_reset(CPUX86State *env) env-dr[7] = DR7_FIXED_1; cpu_breakpoint_remove_all(env, BP_CPU); cpu_watchpoint_remove_all(env, BP_CPU); + +env-mcg_status = 0; } void cpu_x86_close(CPUX86State *env)
[Qemu-devel] [BUGFIX] MCE: Fix bug of IA32_MCG_STATUS after system reset
Now, if we inject a fatal MCE into guest OS, for example Linux, Linux will go panic and then reboot. But if we inject another MCE now, system will reset directly instead of go panic firstly, because MCG_STATUS.MCIP is set to 1 and not cleared after reboot. This is does not follow the behavior in real hardware. This patch fixes this via set env-mcg_status to 0 during system reset. Signed-off-by: Huang Ying ying.hu...@intel.com --- target-i386/helper.c |2 ++ 1 file changed, 2 insertions(+) --- a/target-i386/helper.c +++ b/target-i386/helper.c @@ -617,6 +617,8 @@ void cpu_reset(CPUX86State *env) env-dr[7] = DR7_FIXED_1; cpu_breakpoint_remove_all(env, BP_CPU); cpu_watchpoint_remove_all(env, BP_CPU); + +env-mcg_status = 0; } void cpu_x86_close(CPUX86State *env)
