From: Ian Campbell <ian.campbell@citrix.com>
To: Tamas K Lengyel <tklengyel@sec.in.tum.de>
Cc: "wei.liu2@citrix.com" <wei.liu2@citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>,
Julien Grall <julien.grall@linaro.org>, Tim Deegan <tim@xen.org>,
Xen-devel <xen-devel@lists.xen.org>,
Stefano Stabellini <stefano.stabellini@citrix.com>,
Jan Beulich <jbeulich@suse.com>, Keir Fraser <keir@xen.org>
Subject: Re: [PATCH V14 5/7] xen/arm: Instruction prefetch abort (X) mem_access event handling
Date: Mon, 30 Mar 2015 16:24:02 +0100 [thread overview]
Message-ID: <1427729042.13935.312.camel@citrix.com> (raw)
In-Reply-To: <CABfawhnqwVQ0+8dnrJrsR5H2Yzqn3PWGz5ogZOxCiJSRTZbQSg@mail.gmail.com>
On Mon, 2015-03-30 at 17:14 +0200, Tamas K Lengyel wrote:
> According to ARMv8 ARM HPFAR is valid for any of these:
> * A Translation or Access Flag fault on a stage 2 translation.
> * A stage 2 Address Size fault.
> * A fault on the stage 2 translation of an address accessed in a
> stage 1 translation table walk.
>
> I think what you are (correctly) saying is that it omits "a permission
> fault on a stage 2 translation", which is one of the cases which can
> occur under xenaccess. Which is shame :-(
>
> Hm, what I recall is that it is valid for permission faults as well,
> but only and exclusively during s1ptw.
Right, which is the third bullet I quoted. The issue I was referring to
was the lack of permission faults being mentioned in the first bullet (!
s1ptw case).
Ian.
next prev parent reply other threads:[~2015-03-30 15:24 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-26 22:05 [PATCH V14 0/7] Mem_access for ARM Tamas K Lengyel
2015-03-26 22:05 ` [PATCH V14 1/7] xen/arm: groundwork for mem_access support on ARM Tamas K Lengyel
2015-04-15 13:39 ` Ian Campbell
2015-03-26 22:05 ` [PATCH V14 2/7] xen/arm: Implement domain_get_maximum_gpfn Tamas K Lengyel
2015-04-08 13:23 ` Julien Grall
2015-04-08 13:38 ` Tamas K Lengyel
2015-04-08 13:42 ` Julien Grall
2015-04-08 13:47 ` Tamas K Lengyel
2015-04-08 13:49 ` Julien Grall
2015-03-26 22:05 ` [PATCH V14 3/7] xen/arm: Allow hypervisor access to mem_access protected pages Tamas K Lengyel
2015-04-08 14:33 ` Julien Grall
2015-04-08 15:57 ` Tamas K Lengyel
2015-04-08 16:07 ` Julien Grall
2015-04-15 13:48 ` Ian Campbell
2015-04-15 15:36 ` Tamas K Lengyel
2015-04-15 15:45 ` Ian Campbell
2015-04-16 9:04 ` Tim Deegan
2015-03-26 22:05 ` [PATCH V14 4/7] xen/arm: Data abort exception (R/W) mem_access events Tamas K Lengyel
2015-04-08 15:26 ` Julien Grall
2015-04-08 15:45 ` Tamas K Lengyel
2015-04-15 13:53 ` Ian Campbell
2015-03-26 22:05 ` [PATCH V14 5/7] xen/arm: Instruction prefetch abort (X) mem_access event handling Tamas K Lengyel
2015-03-26 23:21 ` Julien Grall
2015-03-27 8:32 ` Tamas K Lengyel
2015-03-27 12:21 ` Julien Grall
2015-03-27 15:52 ` Ian Campbell
2015-03-27 22:18 ` Tamas K Lengyel
2015-03-30 9:41 ` Ian Campbell
2015-03-30 15:14 ` Tamas K Lengyel
2015-03-30 15:24 ` Ian Campbell [this message]
2015-03-30 15:28 ` Tamas K Lengyel
2015-03-26 22:05 ` [PATCH V14 6/7] xen/arm: Enable mem_access on ARM Tamas K Lengyel
2015-03-26 22:05 ` [PATCH V14 7/7] tools/libxc: Allocate magic page for mem access " Tamas K Lengyel
2015-04-15 13:36 ` [PATCH V14 0/7] Mem_access for ARM Ian Campbell
2015-04-15 14:47 ` Tamas K Lengyel
2015-04-15 15:04 ` Ian Campbell
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