[ck] [PATCH openEuler v1 041/119] openeuler: arm64: kexec: only clear EOI for SDEI in NMI context

From: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> commit 21440a9cd9bea4d8d2c41064cc9d9a06e30e4d96 openEuler-1.0. We need to clear EOI for the secure timer only when we panic from sdei_handler. If we clear EOI for the secure timer in normal panic routiue, it has no bad effect on Hi1620, but it may cause undefine behavior on Hi1616. So add a check for NMI context before we clear EOI for the secure timer. Fixes: dd397d5febc4("sdei_watchdog: clear EOI of the secure timer before kdump") Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> Reviewed-by: Wei Li <liwei391(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Signed-off-by: Xin Hao <haoxing990(a)gmail.com> --- arch/arm64/kernel/machine_kexec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 3c0e9383d7e0..e3b427446d2b 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -268,7 +268,8 @@ void machine_crash_shutdown(struct pt_regs *regs) * interrupt failed to trigger in the second kernel. So we clear eoi * of the secure timer before booting the second kernel. */ - sdei_watchdog_clear_eoi(); + if (in_nmi()) + sdei_watchdog_clear_eoi(); /* for crashing cpu */ crash_save_cpu(regs, smp_processor_id()); -- 2.31.0