From: Julien Grall <julien.grall@arm.com>
To: Tamas K Lengyel <tamas@tklengyel.com>,
"Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Cc: Xen-devel <xen-devel@lists.xenproject.org>,
Stefano Stabellini <sstabellini@kernel.org>,
Steve Capper <Steve.Capper@arm.com>
Subject: Re: [PATCH v5 5/9] monitor: ARM SMC events
Date: Mon, 6 Jun 2016 11:07:54 +0100 [thread overview]
Message-ID: <bcdf8c5f-d20c-1144-0968-fd18fc712455@arm.com> (raw)
In-Reply-To: <CABfawh=uNi=paxdV1kJVikm4izfU4jdevGDviuwn620k1OhMOQ@mail.gmail.com>
Hello,
On 04/06/2016 18:40, Tamas K Lengyel wrote:
> On Sat, Jun 4, 2016 at 3:03 AM, Edgar E. Iglesias
> <edgar.iglesias@gmail.com> wrote:
>> Forwarding SMC events for SMC insns that didn't pass the condition tests
>> doesn't make any sense to me. It'll just make the receivers job harder.
>> Why would a receiver want to do anything else than drop these?
>> If it actually does look at them it'll be looking at implementation
>> defined HW behaviour that may vary between CPU implementations.
>
> If for no other purposes it may be useful to log them to be able to
> study the CPU implementation's behavior.
I cannot see how you will be able to study ARM CPU implementation's
behavior with VM event. Though I am not familiar with it.
For now, it looks like to me that forwarding conditional SMC even if the
condition check has failed will require a lot of code in each
introspection applications, not to mention that they will need specific
code to distinguish ARMv7 vs ARMv8.
Anyway, I am planning to send a patch to ignore conditional SMCs if the
condition check has failed because this is the right thing to do.
Regards,
--
Julien Grall
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next prev parent reply other threads:[~2016-06-06 10:08 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-02 22:52 [PATCH v5 1/9] vm_event: clear up return value of vm_event_monitor_traps Tamas K Lengyel
2016-06-02 22:52 ` [PATCH v5 2/9] monitor: Rename vm_event_monitor_get_capabilities Tamas K Lengyel
2016-06-17 19:07 ` Tamas K Lengyel
2016-06-21 9:20 ` Julien Grall
2016-06-02 22:52 ` [PATCH v5 3/9] monitor: Rename vm_event_monitor_guest_request Tamas K Lengyel
2016-06-17 19:10 ` Tamas K Lengyel
2016-06-21 9:18 ` Julien Grall
2016-06-02 22:52 ` [PATCH v5 4/9] monitor: Rename hvm/event to hvm/monitor Tamas K Lengyel
2016-06-02 22:52 ` [PATCH v5 5/9] monitor: ARM SMC events Tamas K Lengyel
2016-06-03 9:49 ` Julien Grall
2016-06-03 13:40 ` Tamas K Lengyel
2016-06-03 14:43 ` Julien Grall
2016-06-03 15:03 ` Tamas K Lengyel
2016-06-03 15:06 ` Julien Grall
2016-06-03 15:42 ` Tamas K Lengyel
2016-06-03 15:27 ` Tamas K Lengyel
2016-06-03 15:34 ` Tamas K Lengyel
2016-06-04 9:03 ` Edgar E. Iglesias
2016-06-04 17:40 ` Tamas K Lengyel
2016-06-06 10:07 ` Julien Grall [this message]
[not found] ` <CABfawh=tOsUP1dQi9oAZM+iy3rMmCKDW=VByT-L-xYdAMBiMKw@mail.gmail.com>
[not found] ` <CABfawhkSXqky9WWp8NyKEUrH_ZzSJToxAncTeSYeKBg1q63rwg@mail.gmail.com>
2016-06-06 15:24 ` Tamas K Lengyel
2016-06-06 15:54 ` Julien Grall
2016-06-06 15:56 ` Tamas K Lengyel
2016-06-06 16:14 ` Tamas K Lengyel
2016-06-06 16:38 ` Julien Grall
2016-06-06 17:28 ` Tamas K Lengyel
2016-06-07 7:13 ` Jan Beulich
2016-06-07 10:30 ` Stefano Stabellini
2016-06-07 16:06 ` Tamas K Lengyel
2016-06-02 22:52 ` [PATCH v5 6/9] arm/vm_event: get/set registers Tamas K Lengyel
2016-06-03 10:34 ` Jan Beulich
2016-06-03 19:27 ` Tamas K Lengyel
2016-06-02 22:52 ` [PATCH v5 7/9] tools/libxc: add xc_monitor_privileged_call Tamas K Lengyel
2016-06-02 22:52 ` [PATCH v5 8/9] x86/vm_event: Add HVM debug exception vm_events Tamas K Lengyel
2016-06-03 10:49 ` Jan Beulich
2016-06-03 13:29 ` Tamas K Lengyel
2016-06-03 14:23 ` Jan Beulich
2016-06-03 14:34 ` Tamas K Lengyel
2016-06-03 14:45 ` Jan Beulich
2016-06-03 14:51 ` Tamas K Lengyel
2016-06-02 22:52 ` [PATCH v5 9/9] tools/xen-access: add test-case for ARM SMC Tamas K Lengyel
2016-06-03 7:08 ` [PATCH v5 1/9] vm_event: clear up return value of vm_event_monitor_traps Razvan Cojocaru
2016-06-03 15:54 ` Jan Beulich
2016-06-03 16:03 ` Tamas K Lengyel
2016-06-17 19:09 ` Tamas K Lengyel
2016-06-24 10:58 ` Tian, Kevin
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