[PATCH v3 0/2] Support SSTC while PM operations
Nick Hu
nick.hu at sifive.com
Sun Oct 27 20:39:24 PDT 2024
When the cpu is going to be hotplug, stop the stimecmp to prevent pending
interrupt.
When the cpu is going to be suspended, save the stimecmp before entering
the suspend state and restore it in the resume path.
changes in v3:
1. Update the commit description
2. Remove csr_read/write_hi_lo from the previous patch
Link: https://lore.kernel.org/lkml/20240926065422.226518-1-nick.hu@sifive.com/T/
changes in v2:
1. Add csr_read/write_hi_lo operations
2. Apply the suggestion from Anup.
Link: https://lore.kernel.org/lkml/20240829033904.477200-3-nick.hu@sifive.com/T/#u
Nick Hu (2):
riscv: Add stimecmp save and restore
clocksource/drivers/timer-riscv: Stop stimecmp when cpu hotplug
arch/riscv/include/asm/suspend.h | 4 ++++
arch/riscv/kernel/suspend.c | 14 ++++++++++++++
drivers/clocksource/timer-riscv.c | 6 ++++++
3 files changed, 24 insertions(+)
--
2.34.1
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