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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-12-02 00:41:39 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-12-02 22:57:23 +1100 |
| commit | 935b534c24f014325b72a3619bbbdc18191f9c3d (patch) | |
| tree | d9e1ffd153608fa4e206b9a20fdc896d3e40597f /arch/powerpc/mm/fault.c | |
| parent | a4135cbebde8375e2a9d91261b4546ce3f3b9b0f (diff) | |
| download | linux-935b534c24f014325b72a3619bbbdc18191f9c3d.tar.bz2 | |
powerpc/64s: Move and rename do_bad_slb_fault as it is not hash specific
slb.c is hash-specific SLB management, but do_bad_slb_fault deals with
segment interrupts that occur with radix MMU as well.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211201144153.2456614-5-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/mm/fault.c')
| -rw-r--r-- | arch/powerpc/mm/fault.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index a8d0ce85d39a..2d4a411c7c85 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -35,6 +35,7 @@ #include <linux/kfence.h> #include <linux/pkeys.h> +#include <asm/asm-prototypes.h> #include <asm/firmware.h> #include <asm/interrupt.h> #include <asm/page.h> @@ -620,4 +621,27 @@ DEFINE_INTERRUPT_HANDLER(do_bad_page_fault_segv) { bad_page_fault(regs, SIGSEGV); } + +/* + * In radix, segment interrupts indicate the EA is not addressable by the + * page table geometry, so they are always sent here. + * + * In hash, this is called if do_slb_fault returns error. Typically it is + * because the EA was outside the region allowed by software. + */ +DEFINE_INTERRUPT_HANDLER(do_bad_segment_interrupt) +{ + int err = regs->result; + + if (err == -EFAULT) { + if (user_mode(regs)) + _exception(SIGSEGV, regs, SEGV_BNDERR, regs->dar); + else + bad_page_fault(regs, SIGSEGV); + } else if (err == -EINVAL) { + unrecoverable_exception(regs); + } else { + BUG(); + } +} #endif |