提交 b96672dd 编写于 作者: N Nicholas Piggin 提交者: Michael Ellerman

powerpc: Machine check interrupt is a non-maskable interrupt

Use nmi_enter similarly to system reset interrupts. This uses NMI
printk NMI buffers and turns off various debugging facilities that
helps avoid tripping on ourselves or other CPUs.
Signed-off-by: NNicholas Piggin <npiggin@gmail.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
上级 6fcd6baa
......@@ -644,8 +644,10 @@ int machine_check_generic(struct pt_regs *regs)
void machine_check_exception(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
int recover = 0;
bool nested = in_nmi();
if (!nested)
nmi_enter();
/* 64s accounts the mce in machine_check_early when in HVMODE */
if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) || !cpu_has_feature(CPU_FTR_HVMODE))
......@@ -677,10 +679,11 @@ void machine_check_exception(struct pt_regs *regs)
/* Must die if the interrupt is not recoverable */
if (!(regs->msr & MSR_RI))
panic("Unrecoverable Machine check");
nmi_panic(regs, "Unrecoverable Machine check");
bail:
exception_exit(prev_state);
if (!nested)
nmi_exit();
}
void SMIException(struct pt_regs *regs)
......
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