linux-kernel - Re: [PATCH v2 07/22] KVM: MMU: cache mmio info on page fault path

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4E0B081B.4080306@redhat.com>
Date:	Wed, 29 Jun 2011 14:10:19 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v2 07/22] KVM: MMU: cache mmio info on page fault path

On 06/29/2011 02:09 PM, Xiao Guangrong wrote:
> On 06/29/2011 04:48 PM, Avi Kivity wrote:
> >  On 06/22/2011 05:31 PM, Xiao Guangrong wrote:
> >>  If the page fault is caused by mmio, we can cache the mmio info, later, we do
> >>  not need to walk guest page table and quickly know it is a mmio fault while we
> >>  emulate the mmio instruction
> >
> >  Does this work if the mmio spans two pages?
> >
>
> If the mmio spans two pages, we already split the emulation into two parts,
> and the mmio cache info is only matched for one page, so i thinks it works
> well :-)

Ok, thanks.

-- 
error compiling committee.c: too many arguments to function

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/