arm64/mm: Define esr_to_debug_fault_info() (359048f9) · Commits · 戴 / test

fault_info[] and debug_fault_info[] are static arrays defining memory abort exception handling functions looking into ESR fault status code encodings. As esr_to_fault_info() is already available providing fault_info[] array lookup, it really makes sense to have a corresponding debug_fault_info[] array lookup function as well. This just adds an equivalent helper function esr_to_debug_fault_info(). Acked-by:

Mark Rutland <mark.rutland@arm.com> Signed-off-by:

Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by:

Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/mm/fault.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -56,12 +56,18 @@ struct fault_info {
		};

		static const struct fault_info fault_info[];
		static struct fault_info debug_fault_info[];

		static inline const struct fault_info *esr_to_fault_info(unsigned int esr)
		{
		return fault_info + (esr & ESR_ELx_FSC);
		}

		static inline const struct fault_info *esr_to_debug_fault_info(unsigned int esr)
		{
		return debug_fault_info + DBG_ESR_EVT(esr);
		}

		#ifdef CONFIG_KPROBES
		static inline int notify_page_fault(struct pt_regs *regs, unsigned int esr)
		{
		@@ -830,7 +836,7 @@ asmlinkage int __exception do_debug_exception(unsigned long addr,
		unsigned int esr,
		struct pt_regs *regs)
		{
		const struct fault_info *inf = debug_fault_info + DBG_ESR_EVT(esr);
		const struct fault_info *inf = esr_to_debug_fault_info(esr);
		int rv;

		/*

Admin message