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From: Florian Weimer <fweimer@redhat.com>
To: Sandipan Das <sandipan@linux.ibm.com>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
	linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linuxram@us.ibm.com, aneesh.kumar@linux.ibm.com,
	bauerman@linux.ibm.com, mpe@ellerman.id.au
Subject: Re: [PATCH 2/2] selftests: vm: pkeys: Fix powerpc access right updates
Date: Fri, 08 May 2020 22:03:20 +0200	[thread overview]
Message-ID: <87mu6ii48n.fsf@oldenburg2.str.redhat.com> (raw)
In-Reply-To: <a40c364d-e204-1d63-c211-7cdfdccb32e0@linux.ibm.com> (Sandipan Das's message of "Sat, 9 May 2020 01:24:26 +0530")

* Sandipan Das:

> Hi Florian,
>
> On 08/05/20 11:31 pm, Florian Weimer wrote:
>> * Sandipan Das:
>> 
>>> The Power ISA mandates that all writes to the Authority
>>> Mask Register (AMR) must always be preceded as well as
>>> succeeded by a context-synchronizing instruction. This
>>> applies to both the privileged and unprivileged variants
>>> of the Move To AMR instruction.
>> 
>> Ugh.  Do you have a reference for that?
>> 
>> We need to fix this in glibc.
>> 
>
> This is from Table 6 of Chapter 11 in page 1134 of Power
> ISA 3.0B. The document can be found here:
> https://ibm.ent.box.com/s/1hzcwkwf8rbju5h9iyf44wm94amnlcrv

Thanks a lot!  I filed:

  <https://sourceware.org/bugzilla/show_bug.cgi?id=25954>

Florian


WARNING: multiple messages have this Message-ID (diff)
From: Florian Weimer <fweimer@redhat.com>
To: Sandipan Das <sandipan@linux.ibm.com>
Cc: aneesh.kumar@linux.ibm.com, linuxram@us.ibm.com,
	linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
	akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org,
	bauerman@linux.ibm.com
Subject: Re: [PATCH 2/2] selftests: vm: pkeys: Fix powerpc access right updates
Date: Fri, 08 May 2020 22:03:20 +0200	[thread overview]
Message-ID: <87mu6ii48n.fsf@oldenburg2.str.redhat.com> (raw)
In-Reply-To: <a40c364d-e204-1d63-c211-7cdfdccb32e0@linux.ibm.com> (Sandipan Das's message of "Sat, 9 May 2020 01:24:26 +0530")

* Sandipan Das:

> Hi Florian,
>
> On 08/05/20 11:31 pm, Florian Weimer wrote:
>> * Sandipan Das:
>> 
>>> The Power ISA mandates that all writes to the Authority
>>> Mask Register (AMR) must always be preceded as well as
>>> succeeded by a context-synchronizing instruction. This
>>> applies to both the privileged and unprivileged variants
>>> of the Move To AMR instruction.
>> 
>> Ugh.  Do you have a reference for that?
>> 
>> We need to fix this in glibc.
>> 
>
> This is from Table 6 of Chapter 11 in page 1134 of Power
> ISA 3.0B. The document can be found here:
> https://ibm.ent.box.com/s/1hzcwkwf8rbju5h9iyf44wm94amnlcrv

Thanks a lot!  I filed:

  <https://sourceware.org/bugzilla/show_bug.cgi?id=25954>

Florian


  reply	other threads:[~2020-05-08 20:03 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-08 17:49 [PATCH 0/2] selftests: vm: pkeys: Some powerpc fixes Sandipan Das
2020-05-08 17:49 ` Sandipan Das
2020-05-08 17:49 ` [PATCH 1/2] selftests: vm: pkeys: Fix powerpc access right definitions Sandipan Das
2020-05-08 17:49   ` Sandipan Das
2020-05-08 17:49 ` [PATCH 2/2] selftests: vm: pkeys: Fix powerpc access right updates Sandipan Das
2020-05-08 17:49   ` Sandipan Das
2020-05-08 18:01   ` Florian Weimer
2020-05-08 18:01     ` Florian Weimer
2020-05-08 19:54     ` Sandipan Das
2020-05-08 19:54       ` Sandipan Das
2020-05-08 20:03       ` Florian Weimer [this message]
2020-05-08 20:03         ` Florian Weimer

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