linux-kernel - Re: [PATCH] KVM: nVMX: expose VPID capability to L1

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Message-ID: <BLU436-SMTP836B8F64853B13DFF973C804E0@phx.gbl>
Date:	Tue, 29 Sep 2015 09:15:52 +0800
From:	Wanpeng Li <wanpeng.li@...mail.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
CC:	Jan Kiszka <jan.kiszka@...mens.com>, Bandan Das <bsd@...hat.com>,
	Wincy Van <fanwenyi0529@...il.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: nVMX: expose VPID capability to L1

On 9/28/15 8:05 PM, Paolo Bonzini wrote:
>
> On 24/09/2015 08:51, Wanpeng Li wrote:
>>   		/*
>>   		 * For nested guests, we don't do anything specific
>>   		 * for single context invalidation. Hence, only advertise
>>   		 * support for global context invalidation.
>>   		 */
>> -		vmx->nested.nested_vmx_ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT;
>> +		vmx->nested.nested_vmx_ept_vpid_caps |= VMX_EPT_EXTENT_GLOBAL_BIT;
>> +		vmx->nested.nested_vmx_ept_vpid_caps |= (unsigned long)vmx_capability.vpid << 32;
> Hi Wanpeng, the comment above is about invept, but the same applies
> applies to invvpid.  We can set only VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT.

Agreed. I see the patch has already in kvm/queue, if I need to send out 
another patch or you can adjust it for me? :-)

Regards,
Wanpeng Li
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