Re: [PATCH v9 25/27] KVM: nVMX: Introduce new VMX_BASIC bit for event error_code delivery to L1

Chao Gao
2024-01-26T07:54:15Z

On Tue, Jan 23, 2024 at 06:41:58PM -0800, Yang Weijiang wrote:
>Per SDM description(Vol.3D, Appendix A.1):
>"If bit 56 is read as 1, software can use VM entry to deliver a hardware
>exception with or without an error code, regardless of vector"
>
>Modify has_error_code check before inject events to nested guest. Only
>enforce the check when guest is in real mode, the exception is not hard
>exception and the platform doesn't enumerate bit56 in VMX_BASIC, in all
>other case ignore the check to make the logic consistent with SDM.
>
>Suggested-by: Chao Gao <chao.gao@intel.com>
>Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
>Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>

Reviewed-by: Chao Gao <chao.gao@intel.com>