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| author | Andrew Jones <ajones@ventanamicro.com> | 2023-04-27 19:36:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 17:03:04 +0300 |
| commit | ccfe86622082fcd352c2935825226f23b422ab8f (patch) | |
| tree | 15d7cc15a5b82d5ac3e24c3f8c374d45cfec8f3f /arch/riscv/include/asm/sbi.h | |
| parent | f8076d2a7fcee64cb417c2c41ce19d1f652ab38f (diff) | |
| download | linux-ccfe86622082fcd352c2935825226f23b422ab8f.tar.xz | |
RISC-V: Align SBI probe implementation with spec
commit 41cad8284d5e6bf1d49d3c10a6b52ee1ae866a20 upstream.
sbi_probe_extension() is specified with "Returns 0 if the given SBI
extension ID (EID) is not available, or 1 if it is available unless
defined as any other non-zero value by the implementation."
Additionally, sbiret.value is a long. Fix the implementation to
ensure any nonzero long value is considered a success, rather
than only positive int values.
Fixes: b9dcd9e41587 ("RISC-V: Add basic support for SBI v0.2")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230427163626.101042-1-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/riscv/include/asm/sbi.h')
| -rw-r--r-- | arch/riscv/include/asm/sbi.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 2a0ef738695e..9baddaee5623 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -293,7 +293,7 @@ int sbi_remote_hfence_vvma_asid(const struct cpumask *cpu_mask, unsigned long start, unsigned long size, unsigned long asid); -int sbi_probe_extension(int ext); +long sbi_probe_extension(int ext); /* Check if current SBI specification version is 0.1 or not */ static inline int sbi_spec_is_0_1(void) |