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riscv: cpufeature: detect RISCV_ALTERNATIVES_EARLY_BOOT earlier

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Currently riscv_cpufeature_patch_func() does nothing at the
RISCV_ALTERNATIVES_EARLY_BOOT stage. Add a check to detect whether we
are in this stage and exit early. This will allow us to use
riscv_cpufeature_patch_func() for scanning of all ISA extensions.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230128172856.3814-3-jszhang@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Jisheng Zhang 2023-01-29 01:28:45 +08:00 committed by Palmer Dabbelt
parent abcc445acd
commit 191b27c7c0
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1 changed files with 3 additions and 0 deletions
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3
arch/riscv/kernel/cpufeature.c
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@ -330,6 +330,9 @@ void __init_or_module riscv_cpufeature_patch_func(struct alt_entry *begin,
struct alt_entry *alt;
u32 tmp;
if (stage == RISCV_ALTERNATIVES_EARLY_BOOT)
return;
for (alt = begin; alt < end; alt++) {
if (alt->vendor_id != 0)
continue;