linux-kernel - Re: [PATCH v2 0/3] Add some perf support for mips

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Date:   Thu, 25 Feb 2021 10:10:12 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, Xuefeng Li <lixuefeng@...ngson.cn>,
        Juxin Gao <gaojuxin@...ngson.cn>
Subject: Re: [PATCH v2 0/3] Add some perf support for mips

Em Thu, Feb 25, 2021 at 09:49:56AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Wed, Feb 24, 2021 at 10:16:55AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Mon, Feb 22, 2021 at 02:43:39PM +0800, Tiezhu Yang escreveu:
> > > On 02/04/2021 11:35 AM, Tiezhu Yang wrote:
> > > > v2: add R26 and R27 to the enum perf_event_mips_regs in patch #1
> > > > 
> > > > Tiezhu Yang (3):
> > > >    MIPS: kernel: Support extracting off-line stack traces from user-space
> > > >      with perf
> > > >    perf tools: Support mips unwinding and dwarf-regs
> > > >    perf tools: Generate mips syscalls_n64.c syscall table
> > > 
> > > Hi Arnaldo,
> > > 
> > > The kernel part patch #1 has been merged.
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1ddc96bd42da
> > > 
> > > Could the perf tool patches #2 and #3 have a chance to be merged before
> > > 5.12-rc1?
> > > If yes, we can use this feature in 5.12-rc1.
> > 
> > Thanks, applied, should make it into 5.12-rc1.
> 
> First we'll have to fix this problem:
> 
>   28    12.45 debian:experimental-x-mips64  : FAIL gcc version 10.2.1 20201224 (Debian 10.2.1-3)
>                      from builtin-diff.c:12:
>     /git/linux/tools/perf/arch/mips/include/perf_regs.h:7:10: fatal error: asm/perf_regs.h: No such file or directory
>         7 | #include <asm/perf_regs.h>
>           |          ^~~~~~~~~~~~~~~~~
>     compilation terminated.
>     In file included from util/perf_regs.h:30,
>                      from util/event.h:15,
>                      from util/branch.h:15,
>                      from util/callchain.h:8,
>                      from builtin-record.c:16:
>     /git/linux/tools/perf/arch/mips/include/perf_regs.h:7:10: fatal error: asm/perf_regs.h: No such file or directory

I'm not finding it in the debian cross build packages:

root@...a78c0aa1c:/# apt-file find perf_regs.h | grep cross
linux-libc-dev-amd64-cross: /usr/x86_64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-arm64-cross: /usr/aarch64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-armel-cross: /usr/arm-linux-gnueabi/include/asm/perf_regs.h
linux-libc-dev-armhf-cross: /usr/arm-linux-gnueabihf/include/asm/perf_regs.h
linux-libc-dev-i386-cross: /usr/i686-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-powerpc-cross: /usr/powerpc-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-ppc64-cross: /usr/powerpc64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-ppc64el-cross: /usr/powerpc64le-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-riscv64-cross: /usr/riscv64-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-s390x-cross: /usr/s390x-linux-gnu/include/asm/perf_regs.h
linux-libc-dev-x32-cross: /usr/x86_64-linux-gnux32/include/asm/perf_regs.h
root@...a78c0aa1c:/#

Ideas?

- Arnaldo