linux-kernel - Re: [PATCH 2/4] MIPS: kvm: Use vm_get_page

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Message-ID: <CAAhV-H57XNHurOYw8PG4=praXEWQ7h_TKM08cGBVRgAth1Rx1A@mail.gmail.com>
Date:   Tue, 17 Nov 2020 09:18:15 +0800
From:   Huacai Chen <chenhc@...ote.com>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
        "open list:MIPS" <linux-mips@...r.kernel.org>,
        kvm <kvm@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] MIPS: kvm: Use vm_get_page_prot to get protection bits

Hi, Thomas,

On Mon, Nov 16, 2020 at 8:35 PM Thomas Bogendoerfer
<tsbogend@...ha.franken.de> wrote:
>
> On Sat, Nov 14, 2020 at 03:34:14PM +0800, Huacai Chen wrote:
> > Hi, Thomas,
> >
> > On Fri, Nov 13, 2020 at 7:13 PM Thomas Bogendoerfer
> > <tsbogend@...ha.franken.de> wrote:
> > >
> > > MIPS protection bits are setup during runtime so using defines like
> > > PAGE_SHARED ignores this runtime changes. Using vm_get_page_prot
> > > to get correct page protection fixes this.
> > Is there some visible bugs if without this fix?
>
> no exec isn't enabled for these mappings, if cpu supports it.
The whole series wants to set XI if supported?

Huacai


Huacai

>
> Thomas.
>
> --
> Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
> good idea.                                                [ RFC1925, 2.3 ]