diff options
| author | Ben Serebrin <[email protected]> | 2015-04-16 11:58:05 -0700 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2015-04-21 19:01:44 +0200 |
| commit | 085e68eeafbf76e21848ad5bafaecec88a11dd64 (patch) | |
| tree | 67ac2223d422bd7db56c9929e16394ae52a796dd /lib/cpu-notifier-error-inject.c | |
| parent | decf63336e356423300b935afbebeca1fcb15184 (diff) | |
KVM: VMX: Preserve host CR4.MCE value while in guest mode.
The host's decision to enable machine check exceptions should remain
in force during non-root mode. KVM was writing 0 to cr4 on VCPU reset
and passed a slightly-modified 0 to the vmcs.guest_cr4 value.
Tested: Built.
On earlier version, tested by injecting machine check
while a guest is spinning.
Before the change, if guest CR4.MCE==0, then the machine check is
escalated to Catastrophic Error (CATERR) and the machine dies.
If guest CR4.MCE==1, then the machine check causes VMEXIT and is
handled normally by host Linux. After the change, injecting a machine
check causes normal Linux machine check handling.
Signed-off-by: Ben Serebrin <[email protected]>
Reviewed-by: Venkatesh Srinivas <[email protected]>
Cc: [email protected]
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'lib/cpu-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions