6.6-stable review patch. If anyone has any objections, please let me know.
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From: Huacai Chen chenhuacai@loongson.cn
[ Upstream commit 863a320dc6fd7c855f47da4bb82a8de2d9102ea2 ]
If the default state of the interrupt controllers in the first kernel don't mask any interrupts, it may cause the second kernel to potentially receive interrupts (which were previously allocated by the first kernel) immediately after a CPU becomes online during its boot process. These interrupts cannot be properly routed, leading to bad IRQ issues.
This patch calls machine_kexec_mask_interrupts() to mask all interrupts during the kexec/kdump process.
Signed-off-by: Tianyang Zhang zhangtianyang@loongson.cn Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Sasha Levin sashal@kernel.org --- arch/loongarch/kernel/machine_kexec.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/loongarch/kernel/machine_kexec.c b/arch/loongarch/kernel/machine_kexec.c index 30aa420610a06..e50c9a81ff1aa 100644 --- a/arch/loongarch/kernel/machine_kexec.c +++ b/arch/loongarch/kernel/machine_kexec.c @@ -249,6 +249,7 @@ void machine_crash_shutdown(struct pt_regs *regs) #ifdef CONFIG_SMP crash_smp_send_stop(); #endif + machine_kexec_mask_interrupts(); cpumask_set_cpu(crashing_cpu, &cpus_in_crash);
pr_info("Starting crashdump kernel...\n"); @@ -286,6 +287,7 @@ void machine_kexec(struct kimage *image)
/* We do not want to be bothered. */ local_irq_disable(); + machine_kexec_mask_interrupts();
pr_notice("EFI boot flag 0x%lx\n", efi_boot); pr_notice("Command line at 0x%lx\n", cmdline_ptr);