diff options
| author | Clément Léger <cleger@rivosinc.com> | 2025-05-23 12:19:22 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@dabbelt.com> | 2025-06-04 15:11:02 -0700 |
| commit | c4a50db1e1739a5d4698dee7cd4c6f6430bff7b3 (patch) | |
| tree | 3dec4a330fb41f25e7de28a960bfd8b42958f756 | |
| parent | 6d6d0641dcfa9d1e398d75791283bf6d129135de (diff) | |
riscv: sbi: add SBI FWFT extension calls
Add FWFT extension calls. This will be ratified in SBI V3.0 hence, it is
provided as a separate commit that can be left out if needed.
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20250523101932.1594077-6-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
| -rw-r--r-- | arch/riscv/kernel/sbi.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c index 818efafdc8e9..53836a9235e3 100644 --- a/arch/riscv/kernel/sbi.c +++ b/arch/riscv/kernel/sbi.c @@ -299,6 +299,8 @@ static int __sbi_rfence_v02(int fid, const struct cpumask *cpu_mask, return 0; } +static bool sbi_fwft_supported; + struct fwft_set_req { u32 feature; unsigned long value; @@ -326,7 +328,15 @@ static void cpu_sbi_fwft_set(void *arg) */ int sbi_fwft_set(u32 feature, unsigned long value, unsigned long flags) { - return -EOPNOTSUPP; + struct sbiret ret; + + if (!sbi_fwft_supported) + return -EOPNOTSUPP; + + ret = sbi_ecall(SBI_EXT_FWFT, SBI_EXT_FWFT_SET, + feature, value, flags, 0, 0, 0); + + return sbi_err_map_linux_errno(ret.error); } /** @@ -348,6 +358,9 @@ int sbi_fwft_set_cpumask(const cpumask_t *mask, u32 feature, .error = ATOMIC_INIT(0), }; + if (!sbi_fwft_supported) + return -EOPNOTSUPP; + if (feature & SBI_FWFT_GLOBAL_FEATURE_BIT) return -EINVAL; @@ -679,6 +692,11 @@ void __init sbi_init(void) pr_info("SBI DBCN extension detected\n"); sbi_debug_console_available = true; } + if (sbi_spec_version >= sbi_mk_version(3, 0) && + sbi_probe_extension(SBI_EXT_FWFT)) { + pr_info("SBI FWFT extension detected\n"); + sbi_fwft_supported = true; + } } else { __sbi_set_timer = __sbi_set_timer_v01; __sbi_send_ipi = __sbi_send_ipi_v01; |