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Re: [PATCH] target/i386: do not set unsupported VMX secondary execution
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From: |
Vitaly Kuznetsov |
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Subject: |
Re: [PATCH] target/i386: do not set unsupported VMX secondary execution controls |
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Date: |
Wed, 01 Apr 2020 09:08:13 +0200 |
"Dr. David Alan Gilbert" <address@hidden> writes:
> So you would think that would tkae care of RDSEED exiting - but what
> about VMCS shadowing?
>
SECONDARY_EXEC_SHADOW_VMCS is special, we are able to emulate it in KVM
even when it is not supported by hardware, see
nested_vmx_setup_ctls_msrs():
/*
* We can emulate "VMCS shadowing," even if the hardware
* doesn't support it.
*/
msrs->secondary_ctls_high |=
SECONDARY_EXEC_SHADOW_VMCS;
--
Vitaly