Commit b8ab5397 authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Russell King
Browse files

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



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: default avatarKirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 993bf4ec
......@@ -926,8 +926,18 @@ static int __init alignment_init(void)
hook_fault_code(1, do_alignment, SIGBUS, BUS_ADRALN,
"alignment exception");
/*
* ARMv6K and ARMv7 use fault status 3 (0b00011) as Access Flag section
* fault, not as alignment error.
*
* TODO: handle ARMv6K properly. Runtime check for 'K' extension is
* needed.
*/
if (cpu_architecture() <= CPU_ARCH_ARMv6) {
hook_fault_code(3, do_alignment, SIGBUS, BUS_ADRALN,
"alignment exception");
}
return 0;
}
......
......@@ -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;
}
......
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