[PATCH v2 0/3] Support SSTC while PM operations

From: Nick Hu
Date: Thu Sep 26 2024 - 02:57:23 EST


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 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@xxxxxxxxxx/T/#u

Nick Hu (3):
riscv: Add csr_read/write_hi_lo support
riscv: Add stimecmp save and restore
clocksource/drivers/timer-riscv: Stop stimecmp when cpu hotplug

arch/riscv/include/asm/csr.h | 22 ++++++++++++++++++++++
arch/riscv/include/asm/suspend.h | 1 +
arch/riscv/kernel/suspend.c | 6 ++++++
drivers/clocksource/timer-riscv.c | 6 ++++++
4 files changed, 35 insertions(+)

--
2.34.1