forked from Minki/linux
arm64: stacktrace: move SDEI stack helpers to stacktrace code
For clarity and ease of maintenance, it would be helpful for all the stack helpers to be in the same place. Move the SDEI stack helpers into the stacktrace code where all the other stack helpers live. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Kalesh Singh <kaleshsingh@google.com> Reviewed-by: Madhavan T. Venkataraman <madvenka@linux.microsoft.com> Reviewed-by: Mark Brown <broonie@kernel.org> Cc: Fuad Tabba <tabba@google.com> Cc: James Morse <james.morse@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20220901130646.1316937-5-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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@ -43,22 +43,5 @@ unsigned long do_sdei_event(struct pt_regs *regs,
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unsigned long sdei_arch_get_entry_point(int conduit);
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#define sdei_arch_get_entry_point(x) sdei_arch_get_entry_point(x)
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struct stack_info;
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bool _on_sdei_stack(unsigned long sp, unsigned long size,
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struct stack_info *info);
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static inline bool on_sdei_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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if (!IS_ENABLED(CONFIG_VMAP_STACK))
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return false;
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if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE))
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return false;
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if (in_nmi())
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return _on_sdei_stack(sp, size, info);
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return false;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_SDEI_H */
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@ -54,7 +54,45 @@ static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
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}
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#else
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static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
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struct stack_info *info) { return false; }
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struct stack_info *info)
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{
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return false;
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}
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#endif
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#if defined(CONFIG_ARM_SDE_INTERFACE) && defined(CONFIG_VMAP_STACK)
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DECLARE_PER_CPU(unsigned long *, sdei_stack_normal_ptr);
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DECLARE_PER_CPU(unsigned long *, sdei_stack_critical_ptr);
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static inline bool on_sdei_normal_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_normal_ptr);
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unsigned long high = low + SDEI_STACK_SIZE;
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return on_stack(sp, size, low, high, STACK_TYPE_SDEI_NORMAL, info);
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}
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static inline bool on_sdei_critical_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_critical_ptr);
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unsigned long high = low + SDEI_STACK_SIZE;
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return on_stack(sp, size, low, high, STACK_TYPE_SDEI_CRITICAL, info);
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}
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#else
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static inline bool on_sdei_normal_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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return false;
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}
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static inline bool on_sdei_critical_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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return false;
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}
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#endif
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#endif /* __ASM_STACKTRACE_H */
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@ -162,38 +162,6 @@ static int init_sdei_scs(void)
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return err;
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}
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static bool on_sdei_normal_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_normal_ptr);
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unsigned long high = low + SDEI_STACK_SIZE;
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return on_stack(sp, size, low, high, STACK_TYPE_SDEI_NORMAL, info);
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}
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static bool on_sdei_critical_stack(unsigned long sp, unsigned long size,
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struct stack_info *info)
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{
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unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_critical_ptr);
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unsigned long high = low + SDEI_STACK_SIZE;
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return on_stack(sp, size, low, high, STACK_TYPE_SDEI_CRITICAL, info);
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}
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bool _on_sdei_stack(unsigned long sp, unsigned long size, struct stack_info *info)
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{
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if (!IS_ENABLED(CONFIG_VMAP_STACK))
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return false;
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if (on_sdei_critical_stack(sp, size, info))
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return true;
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if (on_sdei_normal_stack(sp, size, info))
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return true;
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return false;
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}
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unsigned long sdei_arch_get_entry_point(int conduit)
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{
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/*
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@ -86,8 +86,15 @@ static bool on_accessible_stack(const struct task_struct *tsk,
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return true;
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if (on_overflow_stack(sp, size, info))
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return true;
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if (on_sdei_stack(sp, size, info))
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return true;
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if (IS_ENABLED(CONFIG_VMAP_STACK) &&
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IS_ENABLED(CONFIG_ARM_SDE_INTERFACE) &&
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in_nmi()) {
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if (on_sdei_critical_stack(sp, size, info))
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return true;
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if (on_sdei_normal_stack(sp, size, info))
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return true;
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}
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return false;
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}
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