From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2 v2] perf tools: Enable bpf prologue for arm64
Date: Wed, 25 Jan 2017 13:32:01 +0000 [thread overview]
Message-ID: <20170125133201.GC27026@arm.com> (raw)
In-Reply-To: <20170125072311.22922-1-hekuang@huawei.com>
On Wed, Jan 25, 2017 at 07:23:11AM +0000, He Kuang wrote:
> Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> regs_query_register_offset() to convert register name to offset for
> arm64, so the BPF prologue feature is ready to use.
>
> This patch also changes the 'dwarfnum' to 'offset' in register table,
> so the related functions are consistent with x86.
Wouldn't it be an awful lot simpler just to leave the code as-is, and
implement regs_query_register_offset in the same way that we implement
get_arch_regstr but return the dwarfnum?
I don't really see the point of all the refactoring.
Will
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will.deacon@arm.com>
To: He Kuang <hekuang@huawei.com>
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
alexander.shishkin@linux.intel.com, jolsa@redhat.com,
mhiramat@kernel.org, wangnan0@huawei.com,
bintian.wang@huawei.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/2 v2] perf tools: Enable bpf prologue for arm64
Date: Wed, 25 Jan 2017 13:32:01 +0000 [thread overview]
Message-ID: <20170125133201.GC27026@arm.com> (raw)
In-Reply-To: <20170125072311.22922-1-hekuang@huawei.com>
On Wed, Jan 25, 2017 at 07:23:11AM +0000, He Kuang wrote:
> Since HAVE_KPROBES can be enabled in arm64, this patch introduces
> regs_query_register_offset() to convert register name to offset for
> arm64, so the BPF prologue feature is ready to use.
>
> This patch also changes the 'dwarfnum' to 'offset' in register table,
> so the related functions are consistent with x86.
Wouldn't it be an awful lot simpler just to leave the code as-is, and
implement regs_query_register_offset in the same way that we implement
get_arch_regstr but return the dwarfnum?
I don't really see the point of all the refactoring.
Will
next prev parent reply other threads:[~2017-01-25 13:32 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-24 10:30 [PATCH 0/2] Support bpf prologue for arm64 He Kuang
2017-01-24 10:30 ` [PATCH 1/2] perf probe: Fix wrong register name " He Kuang
2017-01-24 19:11 ` Arnaldo Carvalho de Melo
2017-01-25 9:22 ` Will Deacon
2017-01-26 1:24 ` Masami Hiramatsu
2017-01-26 15:28 ` [tip:perf/core] " tip-bot for He Kuang
2017-05-03 8:54 ` [PATCH 1/2] " Pratyush Anand
2017-01-24 10:30 ` [PATCH 2/2] perf tools: Introduce regs_query_register_offset() " He Kuang
2017-01-24 18:25 ` Will Deacon
2017-01-24 19:09 ` Arnaldo Carvalho de Melo
2017-01-25 7:23 ` [PATCH 2/2 v2] perf tools: Enable bpf prologue " He Kuang
2017-01-25 7:23 ` He Kuang
2017-01-25 13:32 ` Will Deacon [this message]
2017-01-25 13:32 ` Will Deacon
2017-01-26 1:49 ` Masami Hiramatsu
2017-01-26 1:49 ` Masami Hiramatsu
2017-01-26 16:52 ` Will Deacon
2017-01-26 16:52 ` Will Deacon
2017-01-26 19:31 ` Arnaldo Carvalho de Melo
2017-01-26 19:31 ` Arnaldo Carvalho de Melo
2017-02-03 11:08 ` Hekuang
2017-02-03 11:08 ` Hekuang
2017-01-26 1:51 ` Masami Hiramatsu
2017-01-26 1:51 ` Masami Hiramatsu
2017-01-25 7:26 ` [PATCH 2/2] perf tools: Introduce regs_query_register_offset() " Hekuang
2017-01-24 15:56 ` [PATCH 0/2] Support bpf prologue " Arnaldo Carvalho de Melo
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