diff options
| author | Pu Lehui <pulehui@huawei.com> | 2025-07-11 09:04:43 +0000 |
|---|---|---|
| committer | Paul Walmsley <pjw@kernel.org> | 2025-09-18 08:20:59 -0600 |
| commit | 205cbc714842478df4239b5be205b9b459fd9fbc (patch) | |
| tree | 020e74a5f4a45793f0d38c266a7d64dc1849444d /scripts/extract-fwblobs | |
| parent | 6dab7e15c0b312be79ccadf85c9ec7332427ba7b (diff) | |
riscv: Enable ARCH_HAVE_NMI_SAFE_CMPXCHG
The implement of cmpxchg() in riscv is based on atomic primitives and
has NMI-safe features, so it can be used safely in the in_nmi context.
ftrace's ringbuffer relies on NMI-safe cmpxchg() in the NMI context.
Currently, in_nmi() is true when riscv kprobe is in trap-based mode, so
this config needs to be selected, otherwise kprobetrace will not be
available.
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Tested-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20250711090443.1688404-1-pulehui@huaweicloud.com
[pjw@kernel.org: moved to preserve alphabetical order]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Diffstat (limited to 'scripts/extract-fwblobs')
0 files changed, 0 insertions, 0 deletions