diff options
| author | Andrew Jones <ajones@ventanamicro.com> | 2023-04-27 18:36:26 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-29 13:04:50 -0700 |
| commit | 41cad8284d5e6bf1d49d3c10a6b52ee1ae866a20 (patch) | |
| tree | 5ec9f85ff9226487c9e5bafa47a4a69338ca8915 /arch/riscv/include | |
| parent | e4ef93edd4e0b022529303db1915766ff9de450e (diff) | |
| download | linux-41cad8284d5e6bf1d49d3c10a6b52ee1ae866a20.tar.gz | |
RISC-V: Align SBI probe implementation with spec
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>
Diffstat (limited to 'arch/riscv/include')
| -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 acab4410ef2a..5b4a1bf5f439 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -295,7 +295,7 @@ 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) |