The function would fail when it detects the calling hart's vlen doesn't match the first one's. The boot hart is the first hart calling this function during riscv_fill_hwcap, so it is impossible to fail here. Add a comment about this behavior.
Signed-off-by: Andy Chiu andy.chiu@sifive.com Reviewed-by: Conor Dooley conor.dooley@microchip.com --- Changelog v2, v5: - update the comment (Conor) --- arch/riscv/kernel/cpufeature.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 3ed2359eae35..15ffda1968d8 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -683,6 +683,9 @@ void __init riscv_fill_hwcap(void) }
if (elf_hwcap & COMPAT_HWCAP_ISA_V) { + /* + * This cannot fail when called on the boot hart + */ riscv_v_setup_vsize(); /* * ISA string in device tree might have 'v' flag, but