From: Avi Kivity <avi@redhat.com>
To: "Mao, Junjie" <junjie.mao@intel.com>
Cc: "'kvm@vger.kernel.org'" <kvm@vger.kernel.org>
Subject: Re: [PATCH v4] KVM: x86: Implement PCID/INVPCID for guests with EPT
Date: Thu, 28 Jun 2012 18:49:48 +0300 [thread overview]
Message-ID: <4FEC7D1C.9030203@redhat.com> (raw)
In-Reply-To: <4FEC7CFB.5010001@redhat.com>
On 06/28/2012 06:49 PM, Avi Kivity wrote:
> On 06/14/2012 05:04 AM, Mao, Junjie wrote:
>> This patch handles PCID/INVPCID for guests.
>>
>> Process-context identifiers (PCIDs) are a facility by which a logical processor
>> may cache information for multiple linear-address spaces so that the processor
>> may retain cached information when software switches to a different linear
>> address space. Refer to section 4.10.1 in IA32 Intel Software Developer's Manual
>> Volume 3A for details.
>>
>> For guests with EPT, the PCID feature is enabled and INVPCID behaves as running
>> natively.
>> For guests without EPT, the PCID feature is disabled and INVPCID triggers #UD.
>>
Oh, and sorry about the late review.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-06-28 15:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-14 2:04 [PATCH v4] KVM: x86: Implement PCID/INVPCID for guests with EPT Mao, Junjie
2012-06-16 2:32 ` Marcelo Tosatti
2012-06-19 8:24 ` Mao, Junjie
2012-06-28 15:49 ` Avi Kivity
2012-06-28 15:49 ` Avi Kivity [this message]
2012-06-29 2:37 ` Mao, Junjie
2012-06-29 14:51 ` Avi Kivity
2012-07-02 0:32 ` Mao, Junjie
2012-07-02 8:59 ` Avi Kivity
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