From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: Re: [PATCH v3 03/11] KVM: x86: retry non-page-table writing instruction
Date: Thu, 15 Sep 2011 12:56:07 +0800 [thread overview]
Message-ID: <4E718567.9080702@cn.fujitsu.com> (raw)
In-Reply-To: <4E707FBB.5030809@cn.fujitsu.com>
On 09/14/2011 06:19 PM, Xiao Guangrong wrote:
> On 09/14/2011 05:53 PM, Avi Kivity wrote:
>> On 09/13/2011 09:24 PM, Xiao Guangrong wrote:
>>>>>
>>>>> +static bool retry_instruction(struct x86_emulate_ctxt *ctxt,
>>>>> + unsigned long cr2, int emulation_type)
>>>>> +{
>>>>> + if (!vcpu->arch.mmu.direct_map&& !mmu_is_nested(vcpu))
>>>>> + gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL);
>>>>
>>>> If mmu_is_nested() cr2 is an ngpa, we have to translate it to a gpa, no?
>>>>
>>>
>>> Yeah, will fix it.
>>>
>>> And this bug also exists in the current code: it always uses L2 gpa to emulate
>>> write operation.
>>
>> Can you please send this fix separately, so it can be backported if needed?
>>
>
> Sure, i will do it as soon as possible. :-)
I am so sorry, the current code is good, it has already translated L2 gpa to
L1 gpa:
vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa;
Please ignore it.
next prev parent reply other threads:[~2011-09-15 4:53 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-30 2:34 [PATCH v3 01/11] KVM: MMU: avoid pte_list_desc running out in kvm_mmu_pte_write Xiao Guangrong
2011-08-30 2:34 ` [PATCH v3 02/11] KVM: x86: tag the instructions which are used to write page table Xiao Guangrong
2011-08-30 2:35 ` [PATCH v3 03/11] KVM: x86: retry non-page-table writing instruction Xiao Guangrong
2011-09-13 10:47 ` Avi Kivity
2011-09-13 18:24 ` Xiao Guangrong
2011-09-14 9:53 ` Avi Kivity
2011-09-14 10:19 ` Xiao Guangrong
2011-09-15 4:56 ` Xiao Guangrong [this message]
2011-08-30 2:35 ` [PATCH v3 04/11] KVM: x86: cleanup port-in/port-out emulated Xiao Guangrong
2011-08-30 2:35 ` [PATCH v3 05/11] KVM: MMU: do not mark accessed bit on pte write path Xiao Guangrong
2011-09-13 10:53 ` Avi Kivity
2011-09-13 18:29 ` Xiao Guangrong
2011-09-14 9:55 ` Avi Kivity
2011-09-15 13:11 ` Marcelo Tosatti
2011-08-30 2:36 ` [PATCH v3 06/11] KVM: MMU: cleanup FNAME(invlpg) Xiao Guangrong
2011-09-13 11:00 ` Avi Kivity
2011-09-13 18:31 ` Xiao Guangrong
2011-09-14 9:57 ` Avi Kivity
2011-08-30 2:36 ` [PATCH v3 07/11] KVM: MMU: fast prefetch spte on invlpg path Xiao Guangrong
2011-08-30 2:37 ` [PATCH v3 08/11] KVM: MMU: remove unnecessary kvm_mmu_free_some_pages Xiao Guangrong
2011-08-30 2:37 ` [PATCH v3 09/11] KVM: MMU: split kvm_mmu_pte_write function Xiao Guangrong
2011-08-30 2:37 ` [PATCH v3 10/11] KVM: MMU: fix detecting misaligned accessed Xiao Guangrong
2011-08-30 2:38 ` [PATCH v3 11/11] KVM: MMU: improve write flooding detected Xiao Guangrong
2011-09-13 11:07 ` Avi Kivity
2011-09-13 19:19 ` Xiao Guangrong
2011-09-14 9:59 ` Avi Kivity
2011-09-13 9:51 ` [PATCH v3 01/11] KVM: MMU: avoid pte_list_desc running out in kvm_mmu_pte_write Avi Kivity
2011-09-13 10:24 ` Xiao Guangrong
2011-09-13 10:50 ` Avi Kivity
2011-09-13 19:31 ` Xiao Guangrong
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