Re: [PATCH v13 0/7] arm64: Add IPI for backtraces / kgdb; try to use NMI for some IPIs

On Wed, 06 Sep 2023 09:02:55 -0700, Douglas Anderson wrote:

This is an attempt to resurrect Sumit's old patch series [1] that
allowed us to use the arm64 pseudo-NMI to get backtraces of CPUs and
also to round up CPUs in kdb/kgdb. The last post from Sumit that I
could find was v7, so I started my series at v8. I haven't copied all
of his old changelongs here, but you can find them from the link.

This patch series targets v6.6. Specifically it can't land in v6.5
since it depends on commit 8d539b84f1e3 ("nmi_backtrace: allow
excluding an arbitrary CPU").

[...]

Applied to arm64 (for-next/backtrace-ipi), thanks!

[1/7] irqchip/gic-v3: Enable support for SGIs to act as NMIs
      https://git.kernel.org/arm64/c/a02026bf9da1
[2/7] arm64: idle: Tag the arm64 idle functions as __cpuidle
      https://git.kernel.org/arm64/c/d0c14a7d36f0
[3/7] arm64: smp: Remove dedicated wakeup IPI
      https://git.kernel.org/arm64/c/2b2d0a7a96ab
[4/7] arm64: smp: Add arch support for backtrace using pseudo-NMI
      https://git.kernel.org/arm64/c/331a1b3a836c
[5/7] arm64: smp: IPI_CPU_STOP and IPI_CPU_CRASH_STOP should try for NMI
      https://git.kernel.org/arm64/c/d7402513c935
[6/7] arm64: kgdb: Implement kgdb_roundup_cpus() to enable pseudo-NMI roundup
      https://git.kernel.org/arm64/c/2f5cd0c7ffde
[7/7] arm64: smp: Mark IPI globals as __ro_after_init
      https://git.kernel.org/arm64/c/62817d5ba25d

-- 
Catalin


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