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ARM: 6268/1: ARMv6K and ARMv7 use fault statuses 3 and 6 as Access Flag fault

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Statuses 3 (0b00011) and 6 (0x00110) of DFSR are Access Flags faults on
ARMv6K and ARMv7. Let's patch fsr_info[] at runtime if we are on ARMv7
or later.

Unfortunately, we don't have runtime check for 'K' extension, so we
can't check for it.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Kirill A. Shutemov
2010-07-26 11:20:41 +01:00
committed by Russell King
parent 993bf4ec8c
commit b8ab5397bc
2 changed files with 23 additions and 2 deletions
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11
arch/arm/mm/fault.c
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@@ -607,6 +607,17 @@ static int __init exceptions_init(void)
"I-cache maintenance fault");
}
if (cpu_architecture() >= CPU_ARCH_ARMv7) {
/*
* TODO: Access flag faults introduced in ARMv6K.
* Runtime check for 'K' extension is needed
*/
hook_fault_code(3, do_bad, SIGSEGV, SEGV_MAPERR,
"section access flag fault");
hook_fault_code(6, do_bad, SIGSEGV, SEGV_MAPERR,
"section access flag fault");
}
return 0;
}