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ccd477028a
HV interrupts that use HSRR registers do not enter with MSR[RI] clear, but their entry code is not recoverable vs NMI, due to shared use of HSPRG1 as a scratch register to save r13. This means that a system reset or machine check that hits in HSRR interrupt entry can cause r13 to be silently corrupted. Fix this by marking NMIs non-recoverable if they land in HV interrupt ranges. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
20 lines
532 B
C
20 lines
532 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_NMI_H
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#define _ASM_NMI_H
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#ifdef CONFIG_PPC_WATCHDOG
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extern void arch_touch_nmi_watchdog(void);
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#else
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static inline void arch_touch_nmi_watchdog(void) {}
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#endif
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#if defined(CONFIG_NMI_IPI) && defined(CONFIG_STACKTRACE)
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extern void arch_trigger_cpumask_backtrace(const cpumask_t *mask,
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bool exclude_self);
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#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
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#endif
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extern void hv_nmi_check_nonrecoverable(struct pt_regs *regs);
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#endif /* _ASM_NMI_H */
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