Commit e0e3903f authored by Mark Rutland's avatar Mark Rutland Committed by Will Deacon
Browse files

arm64: mm: decode xFSC in mem_abort_decode() 



It would be helpful if mem_abort_decode() could decode the DFSC/IFSC, as
this can make it easier to identify common bugs (e.g. accesses which
trigger alignment faults) without having to manually decode the xFSC
value.

Decode the xFSC in mem_abort_decode().

Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210608123742.11921-1-mark.rutland@arm.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent fcf9dc02

arch/arm64/mm/fault.c

+2 −0
Original line number Diff line number Diff line
@@ -99,6 +99,8 @@ static void mem_abort_decode(unsigned int esr) 
	pr_alert("  EA = %lu, S1PTW = %lu\n",

		 (esr & ESR_ELx_EA) >> ESR_ELx_EA_SHIFT,

		 (esr & ESR_ELx_S1PTW) >> ESR_ELx_S1PTW_SHIFT);

	pr_alert("  FSC = 0x%02x: %s\n", (esr & ESR_ELx_FSC),

		 esr_to_fault_info(esr)->name);



	if (esr_is_data_abort(esr))

		data_abort_decode(esr);