riscv: report misaligned accesses emulation to hwprobe

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hwprobe provides a way to report if misaligned access are emulated. In
order to correctly populate that feature, we can check if it actually
traps when doing a misaligned access. This can be checked using an
exception table entry which will actually be used when a misaligned
access is done from kernel mode.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Link: https://lore.kernel.org/r/20231004151405.521596-8-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

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Clément Léger 2023-10-04 17:14:04 +02:00 • committed by Palmer Dabbelt

parent 90b11b470b

commit 71c54b3d16

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4 changed files with 79 additions and 1 deletions

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18

arch/riscv/include/asm/cpufeature.h

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4

arch/riscv/kernel/cpufeature.c

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2

arch/riscv/kernel/smpboot.c

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56

arch/riscv/kernel/traps_misaligned.c

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