linux-kernel - Re: [PATCH 3/9] KVM: x86: add pcommit support

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Message-ID: <55EF4628.4070607@redhat.com>
Date:	Tue, 8 Sep 2015 22:33:44 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Xiao Guangrong <guangrong.xiao@...ux.intel.com>
Cc:	gleb@...nel.org, mtosatti@...hat.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/9] KVM: x86: add pcommit support



On 08/09/2015 16:17, Xiao Guangrong wrote:
> 
> BTW, the spec saied:
> 
> | IA32_VMX_PROCBASED_CTLS2[53] (which enumerates support for the
> 1-setting of “PCOMMIT exiting”) is
> | always the same as CPUID.07H:EBX.PCOMMIT[bit 22]. Thus, software can
> set “PCOMMIT exiting” to 1
> | if and only if the PCOMMIT instruction is enumerated via CPUID

Thanks.  Can you add it to the commit message ("allow L1 to catch this
instruction for L2 if, as required by the spec, L1 can enumerate the
PCOMMIT instruction via CPUID").

Paolo
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