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| author | Andrew Jones <ajones@ventanamicro.com> | 2023-04-27 19:36:26 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-29 23:04:50 +0300 |
| commit | 41cad8284d5e6bf1d49d3c10a6b52ee1ae866a20 (patch) | |
| tree | 5ec9f85ff9226487c9e5bafa47a4a69338ca8915 /arch/riscv/kvm | |
| parent | e4ef93edd4e0b022529303db1915766ff9de450e (diff) | |
| download | linux-41cad8284d5e6bf1d49d3c10a6b52ee1ae866a20.tar.xz | |
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/kvm')
| -rw-r--r-- | arch/riscv/kvm/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/kvm/main.c b/arch/riscv/kvm/main.c index 41ad7639a17b..c923c113a129 100644 --- a/arch/riscv/kvm/main.c +++ b/arch/riscv/kvm/main.c @@ -75,7 +75,7 @@ static int __init riscv_kvm_init(void) return -ENODEV; } - if (sbi_probe_extension(SBI_EXT_RFENCE) <= 0) { + if (!sbi_probe_extension(SBI_EXT_RFENCE)) { kvm_info("require SBI RFENCE extension\n"); return -ENODEV; } |