From: Balbir Singh <bsingharora@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>, linuxppc-dev@ozlabs.org
Cc: duwe@lst.de, linux-kernel@vger.kernel.org, rostedt@goodmis.org,
kamalesh@linux.vnet.ibm.com, pmladek@suse.com, jeyu@redhat.com,
jkosina@suse.cz, live-patching@vger.kernel.org, mbenes@suse.cz
Subject: Re: [PATCH 5/6] powerpc/livepatch: Add livepatch stack to struct thread_info
Date: Fri, 1 Apr 2016 12:02:29 +1100 [thread overview]
Message-ID: <56FDC8A5.8010303@gmail.com> (raw)
In-Reply-To: <1458817445-5855-5-git-send-email-mpe@ellerman.id.au>
On 24/03/16 22:04, Michael Ellerman wrote:
> In order to support live patching we need to maintain an alternate
> stack of TOC & LR values. We use the base of the stack for this, and
> store the "live patch stack pointer" in struct thread_info.
>
> Unlike the other fields of thread_info, we can not statically initialise
> that value, so it must be done at run time.
>
> This patch just adds the code to support that, it is not enabled until
> the next patch which actually adds live patch support.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
> ---
> arch/powerpc/include/asm/livepatch.h | 8 ++++++++
> arch/powerpc/include/asm/thread_info.h | 4 +++-
> arch/powerpc/kernel/irq.c | 3 +++
> arch/powerpc/kernel/process.c | 6 +++++-
> arch/powerpc/kernel/setup_64.c | 17 ++++++++++-------
> 5 files changed, 29 insertions(+), 9 deletions(-)
>
>
Acked-by: Balbir Singh <bsingharora@gmail.com>
next prev parent reply other threads:[~2016-04-01 1:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-24 11:04 [PATCH HACK 1/6] livepatch-test: Add more cases Michael Ellerman
2016-03-24 11:04 ` [PATCH 2/6] ftrace: Make ftrace_location_range() global Michael Ellerman
2016-03-24 15:20 ` Steven Rostedt
2016-03-24 15:24 ` Jiri Kosina
2016-03-25 10:24 ` Michael Ellerman
2016-03-24 11:04 ` [PATCH 3/6] livepatch: Allow architectures to specify an alternate ftrace location Michael Ellerman
2016-03-24 11:04 ` [PATCH 4/6] powerpc/livepatch: Add livepatch header Michael Ellerman
2016-03-24 11:04 ` [PATCH 5/6] powerpc/livepatch: Add livepatch stack to struct thread_info Michael Ellerman
2016-03-28 23:58 ` Balbir Singh
2016-03-29 5:19 ` Michael Ellerman
2016-03-29 5:45 ` Balbir Singh
2016-04-01 1:02 ` Balbir Singh [this message]
2016-03-24 11:04 ` [PATCH 6/6] powerpc/livepatch: Add live patching support on ppc64le Michael Ellerman
2016-03-24 13:42 ` Torsten Duwe
2016-03-29 5:28 ` Michael Ellerman
2016-04-01 1:10 ` Balbir Singh
2016-03-24 16:37 ` [PATCH HACK 1/6] livepatch-test: Add more cases Kamalesh Babulal
2016-03-26 7:11 ` Balbir Singh
2016-03-28 4:52 ` Kamalesh Babulal
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