linux-kernel - [PATCH V4 0/5] RISC-V fixups to work with crash tool

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Message-Id: <20220726093729.1231867-1-xianting.tian@linux.alibaba.com>
Date:   Tue, 26 Jul 2022 17:37:24 +0800
From:   Xianting Tian <xianting.tian@...ux.alibaba.com>
To:     paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, anup@...infault.org, heiko@...ech.de,
        guoren@...nel.org, mick@....forth.gr,
        alexandre.ghiti@...onical.com, bhe@...hat.com, vgoyal@...hat.com,
        dyoung@...hat.com, corbet@....net
Cc:     kexec@...ts.infradead.org, linux-doc@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        crash-utility@...hat.com, huanyi.xj@...baba-inc.com,
        heinrich.schuchardt@...onical.com, k-hagio-ab@....com,
        hschauhan@...ltrace.org,
        Xianting Tian <xianting.tian@...ux.alibaba.com>
Subject: [PATCH V4 0/5] RISC-V fixups to work with crash tool

I ever sent the patch 1 in the link:
https://patchwork.kernel.org/project/linux-riscv/patch/20220708073150.352830-3-xianting.tian@linux.alibaba.com/
And patch 2,3 in the link:
https://patchwork.kernel.org/project/linux-riscv/patch/20220714113300.367854-2-xianting.tian@linux.alibaba.com/
https://patchwork.kernel.org/project/linux-riscv/patch/20220714113300.367854-3-xianting.tian@linux.alibaba.com/

This patch series just put these patches together, and with two new patch 4, 5.
these five patches are the fixups for machine_kexec, kernel mode PC for vmcore
and improvements for vmcoreinfo and memory layout dump.

The main changes in the five patchs as below,
Patch 1: use __smp_processor_id() instead of smp_processor_id() to cleanup
         the console prints.
Patch 2: Add VM layout, va bits, ram base to vmcoreinfo, which can simplify
         the development of crash tool as ARM64 already did
         (arch/arm64/kernel/crash_core.c).
Patch 3: Add modules to virtual kernel memory layout dump.
Patch 4: Fixup to get correct kernel mode PC for vmcore.
Patch 5: Updates vmcoreinfo.rst.

With these 5 patches(patch 2 is must), crash tool can work well to analyze
a vmcore. The patches for crash tool for RISCV64 is in the link:
https://lore.kernel.org/linux-riscv/20220718025346.411758-1-xianting.tian@linux.alibaba.com/

Changes v1 -> v2:
 1, remove the patch "Add a fast call path of crash_kexec()" from this series
 of patches, as it already applied to riscv git.
 https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git/commit/?h=for-next&id=3f1901110a89b0e2e13adb2ac8d1a7102879ea98
 2, add 'Reviewed-by' based on the comments of v1.
Changes v2 -> v3:
 use "riscv" instead of "riscv64" in patch 5 subject line.
Changes v3 -> v4:
 use "riscv" instead of "riscv64" in the summary of patch 5 subject line.

Xianting Tian (5):
  RISC-V: use __smp_processor_id() instead of smp_processor_id()
  RISC-V: Add arch_crash_save_vmcoreinfo support
  riscv: Add modules to virtual kernel memory layout dump
  RISC-V: Fixup getting correct current pc
  riscv: crash_core: Export kernel vm layout, phys_ram_base

 .../admin-guide/kdump/vmcoreinfo.rst          | 31 +++++++++++++++++++
 arch/riscv/kernel/Makefile                    |  1 +
 arch/riscv/kernel/crash_core.c                | 29 +++++++++++++++++
 arch/riscv/kernel/crash_save_regs.S           |  2 +-
 arch/riscv/kernel/machine_kexec.c             |  2 +-
 arch/riscv/mm/init.c                          |  4 +++
 6 files changed, 67 insertions(+), 2 deletions(-)
 create mode 100644 arch/riscv/kernel/crash_core.c

-- 
2.17.1