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Diffstat (limited to 'arch/riscv/kernel/machine_kexec.c')
-rw-r--r--arch/riscv/kernel/machine_kexec.c46
1 files changed, 35 insertions, 11 deletions
diff --git a/arch/riscv/kernel/machine_kexec.c b/arch/riscv/kernel/machine_kexec.c
index ee79e6839b86..2d139b724bc8 100644
--- a/arch/riscv/kernel/machine_kexec.c
+++ b/arch/riscv/kernel/machine_kexec.c
@@ -15,6 +15,8 @@
#include <linux/compiler.h> /* For unreachable() */
#include <linux/cpu.h> /* For cpu_down() */
#include <linux/reboot.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
/*
* kexec_image_info - Print received image details
@@ -138,20 +140,35 @@ void machine_shutdown(void)
#endif
}
-/* Override the weak function in kernel/panic.c */
-void crash_smp_send_stop(void)
+static void machine_kexec_mask_interrupts(void)
{
- static int cpus_stopped;
+ unsigned int i;
+ struct irq_desc *desc;
- /*
- * This function can be called twice in panic path, but obviously
- * we execute this only once.
- */
- if (cpus_stopped)
- return;
+ for_each_irq_desc(i, desc) {
+ struct irq_chip *chip;
+ int ret;
+
+ chip = irq_desc_get_chip(desc);
+ if (!chip)
+ continue;
+
+ /*
+ * First try to remove the active state. If this
+ * fails, try to EOI the interrupt.
+ */
+ ret = irq_set_irqchip_state(i, IRQCHIP_STATE_ACTIVE, false);
+
+ if (ret && irqd_irq_inprogress(&desc->irq_data) &&
+ chip->irq_eoi)
+ chip->irq_eoi(&desc->irq_data);
- smp_send_stop();
- cpus_stopped = 1;
+ if (chip->irq_mask)
+ chip->irq_mask(&desc->irq_data);
+
+ if (chip->irq_disable && !irqd_irq_disabled(&desc->irq_data))
+ chip->irq_disable(&desc->irq_data);
+ }
}
/*
@@ -169,6 +186,8 @@ machine_crash_shutdown(struct pt_regs *regs)
crash_smp_send_stop();
crash_save_cpu(regs, smp_processor_id());
+ machine_kexec_mask_interrupts();
+
pr_info("Starting crashdump kernel...\n");
}
@@ -195,6 +214,11 @@ machine_kexec(struct kimage *image)
void *control_code_buffer = page_address(image->control_code_page);
riscv_kexec_method kexec_method = NULL;
+#ifdef CONFIG_SMP
+ WARN(smp_crash_stop_failed(),
+ "Some CPUs may be stale, kdump will be unreliable.\n");
+#endif
+
if (image->type != KEXEC_TYPE_CRASH)
kexec_method = control_code_buffer;
else