... to avoid guest errors due to LMCE configurations changes when
migrating from LMCE-enabled QEMU to LMCE-disabled QEMU.
Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
target-i386/machine.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/target-i386/machine.c b/target-i386/machine.c
index 71c0e4d..00375a3 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -347,6 +347,12 @@ static int cpu_post_load(void *opaque, int version_id)
return -EINVAL;
}
+ if (!cpu->enable_lmce && (env->mcg_cap & MCG_LMCE_P)) {
+ error_report("Config mismatch: VCPU has LMCE enabled, "
+ "but \"lmce\" option is disabled");
+ return -EINVAL;
+ }
+
/*
* Real mode guest segments register DPL should be zero.
* Older KVM version were setting it wrongly.
--
2.9.0
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