From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: Jordan Niethe <jniethe5@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
mikey@neuling.org, apopple@linux.ibm.com,
Paul Mackerras <paulus@samba.org>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@c-s.fr>,
naveen.n.rao@linux.vnet.ibm.com, peterz@infradead.org,
jolsa@kernel.org, oleg@redhat.com, fweisbec@gmail.com,
mingo@kernel.org, pedromfc@br.ibm.com, miltonm@us.ibm.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Subject: Re: [PATCH v4 10/10] powerpc/watchpoint: Remove 512 byte boundary
Date: Tue, 21 Jul 2020 08:54:54 +0530 [thread overview]
Message-ID: <8ee4424b-ca42-082d-d845-0e06357c8b8f@linux.ibm.com> (raw)
In-Reply-To: <CACzsE9og50tH9jRZjWYDgbFxdTkDXJq3gMuP8uxPWfrrREo=4w@mail.gmail.com>
Hi Jordan,
On 7/20/20 12:24 PM, Jordan Niethe wrote:
> On Fri, Jul 17, 2020 at 2:11 PM Ravi Bangoria
> <ravi.bangoria@linux.ibm.com> wrote:
>>
>> Power10 has removed 512 bytes boundary from match criteria. i.e. The watch
>> range can cross 512 bytes boundary.
> It looks like this change is not mentioned in ISA v3.1 Book III 9.4
> Data Address Watchpoint. It could be useful to mention that in the
> commit message.
Yes, ISA 3.1 Book III 9.4 has a documentation mistake and hopefully it
will be fixed in the next version of ISA. Though, this is mentioned in
ISA 3.1 change log:
Multiple DEAW:
Added a second Data Address Watchpoint. [H]DAR is
set to the first byte of overlap. 512B boundary is
removed.
I'll mention this in the commit description.
> Also I wonder if could add a test for this to the ptrace-hwbreak selftest?
Yes, I already have a selftest for this in perf-hwbreak. Will send that soon.
Thanks,
Ravi
WARNING: multiple messages have this Message-ID (diff)
From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: Jordan Niethe <jniethe5@gmail.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>,
apopple@linux.ibm.com, mikey@neuling.org, miltonm@us.ibm.com,
peterz@infradead.org, oleg@redhat.com,
Nicholas Piggin <npiggin@gmail.com>,
linux-kernel@vger.kernel.org, Paul Mackerras <paulus@samba.org>,
jolsa@kernel.org, fweisbec@gmail.com, pedromfc@br.ibm.com,
naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org,
mingo@kernel.org, Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Subject: Re: [PATCH v4 10/10] powerpc/watchpoint: Remove 512 byte boundary
Date: Tue, 21 Jul 2020 08:54:54 +0530 [thread overview]
Message-ID: <8ee4424b-ca42-082d-d845-0e06357c8b8f@linux.ibm.com> (raw)
In-Reply-To: <CACzsE9og50tH9jRZjWYDgbFxdTkDXJq3gMuP8uxPWfrrREo=4w@mail.gmail.com>
Hi Jordan,
On 7/20/20 12:24 PM, Jordan Niethe wrote:
> On Fri, Jul 17, 2020 at 2:11 PM Ravi Bangoria
> <ravi.bangoria@linux.ibm.com> wrote:
>>
>> Power10 has removed 512 bytes boundary from match criteria. i.e. The watch
>> range can cross 512 bytes boundary.
> It looks like this change is not mentioned in ISA v3.1 Book III 9.4
> Data Address Watchpoint. It could be useful to mention that in the
> commit message.
Yes, ISA 3.1 Book III 9.4 has a documentation mistake and hopefully it
will be fixed in the next version of ISA. Though, this is mentioned in
ISA 3.1 change log:
Multiple DEAW:
Added a second Data Address Watchpoint. [H]DAR is
set to the first byte of overlap. 512B boundary is
removed.
I'll mention this in the commit description.
> Also I wonder if could add a test for this to the ptrace-hwbreak selftest?
Yes, I already have a selftest for this in perf-hwbreak. Will send that soon.
Thanks,
Ravi
next prev parent reply other threads:[~2020-07-21 3:25 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-17 4:09 [PATCH v4 00/10] powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 01/10] powerpc/watchpoint: Fix 512 byte boundary limit Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 02/10] powerpc/watchpoint: Fix DAWR exception constraint Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 03/10] powerpc/watchpoint: Fix DAWR exception for CACHEOP Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 04/10] powerpc/watchpoint: Enable watchpoint functionality on power10 guest Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-17 4:23 ` Jordan Niethe
2020-07-17 4:23 ` Jordan Niethe
2020-07-17 4:09 ` [PATCH v4 05/10] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-17 5:44 ` Jordan Niethe
2020-07-17 5:44 ` Jordan Niethe
2020-07-21 7:51 ` Ravi Bangoria
2020-07-21 7:51 ` Ravi Bangoria
2020-07-21 11:29 ` Michael Ellerman
2020-07-21 11:29 ` Michael Ellerman
2020-07-21 13:42 ` Ravi Bangoria
2020-07-21 13:42 ` Ravi Bangoria
2020-07-21 14:07 ` Michael Ellerman
2020-07-21 14:07 ` Michael Ellerman
2020-07-21 14:16 ` Ravi Bangoria
2020-07-21 14:16 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 06/10] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-20 1:39 ` Jordan Niethe
2020-07-20 1:39 ` Jordan Niethe
2020-07-17 4:09 ` [PATCH v4 07/10] powerpc/watchpoint: Rename current H_SET_MODE DAWR macro Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-20 1:50 ` Jordan Niethe
2020-07-20 1:50 ` Jordan Niethe
2020-07-17 4:09 ` [PATCH v4 08/10] powerpc/watchpoint: Guest support for 2nd DAWR hcall Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 09/10] powerpc/watchpoint: Return available watchpoints dynamically Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-20 3:42 ` Jordan Niethe
2020-07-20 3:42 ` Jordan Niethe
2020-07-21 3:57 ` Ravi Bangoria
2020-07-21 3:57 ` Ravi Bangoria
2020-07-21 4:41 ` Jordan Niethe
2020-07-21 4:41 ` Jordan Niethe
2020-07-21 8:15 ` Ravi Bangoria
2020-07-21 8:15 ` Ravi Bangoria
2020-07-21 11:36 ` Michael Ellerman
2020-07-21 11:36 ` Michael Ellerman
2020-07-21 13:33 ` Ravi Bangoria
2020-07-21 13:33 ` Ravi Bangoria
2020-07-17 4:09 ` [PATCH v4 10/10] powerpc/watchpoint: Remove 512 byte boundary Ravi Bangoria
2020-07-17 4:09 ` Ravi Bangoria
2020-07-20 6:54 ` Jordan Niethe
2020-07-20 6:54 ` Jordan Niethe
2020-07-21 3:24 ` Ravi Bangoria [this message]
2020-07-21 3:24 ` Ravi Bangoria
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