linux-kernel - Re: [PATCH 1/2] drivers: perf: ctr_get_width function for legacy is not defined

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Message-Id: 
 <170913302972.9913.1220229545519276494.git-patchwork-notify@kernel.org>
Date: Wed, 28 Feb 2024 15:10:29 +0000
From: patchwork-bot+linux-riscv@...nel.org
To: Vadim Shakirov <vadim.shakirov@...tacore.com>
Cc: linux-riscv@...ts.infradead.org, atishp@...shpatra.org,
 anup@...infault.org, will@...nel.org, mark.rutland@....com,
 paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu,
 alexghiti@...osinc.com, ajones@...tanamicro.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drivers: perf: ctr_get_width function for legacy is not
 defined

Hello:

This series was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer@...osinc.com>:

On Tue, 5 Dec 2023 12:25:54 +0300 you wrote:
> With parameters CONFIG_RISCV_PMU_LEGACY=y and CONFIG_RISCV_PMU_SBI=n
> linux kernel crashes when you try perf record:
> 
> $ perf record ls
> [   46.749286] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
> [   46.750199] Oops [#1]
> [   46.750342] Modules linked in:
> [   46.750608] CPU: 0 PID: 107 Comm: perf-exec Not tainted 6.6.0 #2
> [   46.750906] Hardware name: riscv-virtio,qemu (DT)
> [   46.751184] epc : 0x0
> [   46.751430]  ra : arch_perf_update_userpage+0x54/0x13e
> [   46.751680] epc : 0000000000000000 ra : ffffffff8072ee52 sp : ff2000000022b8f0
> [   46.751958]  gp : ffffffff81505988 tp : ff6000000290d400 t0 : ff2000000022b9c0
> [   46.752229]  t1 : 0000000000000001 t2 : 0000000000000003 s0 : ff2000000022b930
> [   46.752451]  s1 : ff600000028fb000 a0 : 0000000000000000 a1 : ff600000028fb000
> [   46.752673]  a2 : 0000000ae2751268 a3 : 00000000004fb708 a4 : 0000000000000004
> [   46.752895]  a5 : 0000000000000000 a6 : 000000000017ffe3 a7 : 00000000000000d2
> [   46.753117]  s2 : ff600000028fb000 s3 : 0000000ae2751268 s4 : 0000000000000000
> [   46.753338]  s5 : ffffffff8153e290 s6 : ff600000863b9000 s7 : ff60000002961078
> [   46.753562]  s8 : ff60000002961048 s9 : ff60000002961058 s10: 0000000000000001
> [   46.753783]  s11: 0000000000000018 t3 : ffffffffffffffff t4 : ffffffffffffffff
> [   46.754005]  t5 : ff6000000292270c t6 : ff2000000022bb30
> [   46.754179] status: 0000000200000100 badaddr: 0000000000000000 cause: 000000000000000c
> [   46.754653] Code: Unable to access instruction at 0xffffffffffffffec.
> [   46.754939] ---[ end trace 0000000000000000 ]---
> [   46.755131] note: perf-exec[107] exited with irqs disabled
> [   46.755546] note: perf-exec[107] exited with preempt_count 4
> 
> [...]

Here is the summary with links:
  - [1/2] drivers: perf: ctr_get_width function for legacy is not defined
    https://git.kernel.org/riscv/c/682dc133f83e
  - [2/2] drivers: perf: added capabilities for legacy PMU
    https://git.kernel.org/riscv/c/65730fe8f4fb

You are awesome, thank you!
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