From: Andrey Smetanin <asmetanin@xxxxxxxxxxxxx>
It's usually impossible to understand from Hyper-V
crash msr's that crash happened because ctl msr
always contains the same value HV_X64_MSR_CRASH_CTL_NOTIFY.
To solve it add a particalar value hv_crash_occurred
inside CPU state and migrate this value with crash msr's.
Signed-off-by: Andrey Smetanin <asmetanin@xxxxxxxxxxxxx>
Signed-off-by: Denis V. Lunev <den@xxxxxxxxxx>
CC: Paolo Bonzini <pbonzini@xxxxxxxxxx>
CC: Andreas Färber <afaerber@xxxxxxx>
---
target-i386/cpu.h | 1 +
target-i386/kvm.c | 1 +
target-i386/machine.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 474a93e..2958cdc 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -907,6 +907,7 @@ typedef struct CPUX86State {
uint64_t msr_hv_tsc;
uint64_t msr_hv_crash_prm[HV_X64_MSR_CRASH_PARAMS];
uint64_t msr_hv_crash_ctl;
+ uint8_t hv_crash_occurred;
/* exception/interrupt handling */
int error_code;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 690677b..2c8d00f 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -2616,6 +2616,7 @@ int kvm_arch_handle_hv_crash(CPUState *cs)
break;
}
}
+ env->hv_crash_occurred = 1;
return 0;
}
diff --git a/target-i386/machine.c b/target-i386/machine.c
index 15b3f31..4f72ba8 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -679,6 +679,7 @@ static const VMStateDescription vmstate_msr_hyperv_crash = {
VMSTATE_UINT64(env.msr_hv_crash_ctl, X86CPU),
VMSTATE_UINT64_ARRAY(env.msr_hv_crash_prm,
X86CPU, HV_X64_MSR_CRASH_PARAMS),
+ VMSTATE_UINT8(env.hv_crash_occurred, X86CPU),
VMSTATE_END_OF_LIST()
}
};
--
1.9.1
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