From: Samuel Holland samuel@sholland.org
stable inclusion from stable-v5.10.122 commit d54a51b51851ead86292a0db4a7184d77623bfe2 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5W6OE
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 232ccac1bd9b5bfe73895f527c08623e7fa0752d ]
Some implementations of the SBI time extension depend on hart-local state (for example, CSRs) that are lost or hardware that is powered down when a CPU is suspended. To be safe, the clockevents driver cannot assume that timer IRQs will be received during CPU suspend.
Fixes: 62b019436814 ("clocksource: new RISC-V SBI timer driver") Signed-off-by: Samuel Holland samuel@sholland.org Reviewed-by: Anup Patel anup@brainfault.org Link: https://lore.kernel.org/r/20220509012121.40031-1-samuel@sholland.org Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/clocksource/timer-riscv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c index 8e73c0a23910..f6adffaecf4d 100644 --- a/drivers/clocksource/timer-riscv.c +++ b/drivers/clocksource/timer-riscv.c @@ -33,7 +33,7 @@ static int riscv_clock_next_event(unsigned long delta, static unsigned int riscv_clock_event_irq; static DEFINE_PER_CPU(struct clock_event_device, riscv_clock_event) = { .name = "riscv_timer_clockevent", - .features = CLOCK_EVT_FEAT_ONESHOT, + .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_C3STOP, .rating = 100, .set_next_event = riscv_clock_next_event, };