linux-kernel - Re: [PATCH v4 4/6] KVM: MMU: prefetch ptes when intercepted guest #PF

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]

Date:	Mon, 5 Jul 2010 09:01:18 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Cc:	Avi Kivity <avi@...hat.com>, LKML <linux-kernel@...r.kernel.org>,
	KVM list <kvm@...r.kernel.org>
Subject: Re: [PATCH v4 4/6] KVM: MMU: prefetch ptes when intercepted guest #PF

On Sat, Jul 03, 2010 at 04:08:42PM +0800, Xiao Guangrong wrote:
> 
> 
> Marcelo Tosatti wrote:
> 
> >> +
> >> +		if (is_rsvd_bits_set(vcpu, gpte, PT_PAGE_TABLE_LEVEL))
> >> +			break;
> > 
> > BTW, doesnt sync_page also lack reserved bit checking? (unrelated to
> > this patch).
> > 
> 
> I think it's not since if EPT is enabled, no unsync page exist, the sync page
> path can't be trigged. :-)

What i mean is, why the sync_page path does not require reserved bit
checking? (EPT disabled).

Just to clarify, this has nothing to do with your patch.

--
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/