| Message ID | 20201104080539.3205889-1-ito-yuichi@fujitsu.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Enable support IPI_CPU_CRASH_STOP to be pseudo-NMI | expand |
Hi Marc, Sumit What should I do to merge this patch. I would appreciate if you have any advice. I have not tested it with ThunderX2 yet. Best regards, Yuichi Ito > -----Original Message----- > From: Yuichi Ito <ito-yuichi@fujitsu.com> > Sent: Wednesday, November 4, 2020 5:06 PM > To: maz@kernel.org; sumit.garg@linaro.org; tglx@linutronix.de; > jason@lakedaemon.net; catalin.marinas@arm.com; will@kernel.org > Cc: linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org; Ito, > Yuichi/伊藤 有一 <ito-yuichi@fujitsu.com> > Subject: [PATCH v2 0/3] Enable support IPI_CPU_CRASH_STOP to be > pseudo-NMI > > This patchset enables IPI_CPU_CRASH_STOP IPI to be pseudo-NMI. > This allows kdump to collect system information even when the CPU is in a > HARDLOCKUP state. > > Only IPI_CPU_CRASH_STOP uses NMI and the other IPIs remain normal > IRQs. > > The patch has been tested on FX1000. > > It also uses some of Sumit's IPI patch set for NMI.[1] > > [1] > https://lore.kernel.org/lkml/1603983387-8738-3-git-send-email-sumit.garg@l > inaro.org/ > > $ echo 1 > /proc/sys/kernel/panic_on_rcu_stal > $ echo HARDLOCKUP > /sys/kernel/debug/provoke-crash/DIRECT > : kernel panics and crash kernel boot > : makedumpfile saves the system state at HARDLOCKUP in vmcore. > > crash utility: > #7 [fffffe00290afd30] lkdtm_HARDLOCKUP at fffffe0010857ee8 > #8 [fffffe00290afd40] direct_entry at fffffe0010857c94 > #9 [fffffe00290afd90] full_proxy_write at fffffe001055dea0 > #10 [fffffe00290afdd0] vfs_write at fffffe001047533c > #11 [fffffe00290afe10] ksys_write at fffffe001047563c > #12 [fffffe00290afe60] __arm64_sys_write at fffffe00104756e8 > #13 [fffffe00290afe70] do_el0_svc at fffffe00101590cc > #14 [fffffe00290afea0] el0_svc at fffffe0010147a30 > #15 [fffffe00290afeb0] el0_sync_handler at fffffe001014835c > #16 [fffffe00290afff0] el0_sync at fffffe0010142c14 > > Changes in v1: > - Rebased to head of upstream master. > - Rebased to Sumit's latest IPIs patch-set [1]. > > [1] > https://lore.kernel.org/lkml/1603983387-8738-3-git-send-email-sumit.garg@l > inaro.org/ > > - Add conditional branch of local_irq_disable(). > > Sumit Garg (1): > irqchip/gic-v3: Enable support for SGIs to act as NMIs > > Yuichi Ito (2): > arch64: smp: Register IPI_CPU_CRASH_STOP IPI as pseudo-NMI > arch64: smp: Disable priority masking when received NMI on PSR.I section > > arch/arm64/kernel/smp.c | 44 > +++++++++++++++++++++++++++++++++++--------- > drivers/irqchip/irq-gic-v3.c | 29 +++++++++++++++++++++-------- > 2 files changed, 56 insertions(+), 17 deletions(-) > > -- > 1.8.3.1