Re: [RFC PATCH v2 09/11] KVM: VMX: Advertise MITI_CTRL_BHB_CLEAR_SEQ_S_SUPPORT

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On 4/14/2023 2:25 PM, Chao Gao wrote:
From: Zhang Chen <chen.zhang@xxxxxxxxx>

Allow guest to query if the underying VMM understands BHB-clearing
sequence and report the statue of BHB-clearing sequence in suprevisor
s/statue/status
mode i.e. CPL < 3 via MSR_VIRTUAL_MITIGATION_ENUM/CTRL.

Enable BHI_DIS_S for guest if guest is using BHI-clearing sequence and
the sequence isn't effective on the processor.

Signed-off-by: Zhang Chen <chen.zhang@xxxxxxxxx>
Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>
Tested-by: Jiaan Lu <jiaan.lu@xxxxxxxxx>
---
Thanks,
Jingqi



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