Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
LoongArch: Mask all interrupts during kexec/kdump
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>
+2
+2
arch/loongarch/kernel/machine_kexec.c
+2
arch/loongarch/kernel/machine_kexec.c
···
237
237
#ifdef CONFIG_SMP
238
238
crash_smp_send_stop();
239
239
#endif
240
+
machine_kexec_mask_interrupts();
240
241
cpumask_set_cpu(crashing_cpu, &cpus_in_crash);
241
242
242
243
pr_info("Starting crashdump kernel...\n");
···
275
274
276
275
/* We do not want to be bothered. */
277
276
local_irq_disable();
277
+
machine_kexec_mask_interrupts();
278
278
279
279
pr_notice("EFI boot flag: 0x%lx\n", efi_boot);
280
280
pr_notice("Command line addr: 0x%lx\n", cmdline_ptr);