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riscv: cpufeature: Fix extension subset checking

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BugLink: https://bugs.launchpad.net/bugs/2073603

[ Upstream commit e67e98ee8952c7d5ce986d1dc6f8221ab8674afa ]

This loop is supposed to check if ext->subset_ext_ids[j] is valid, rather
than if ext->subset_ext_ids[i] is valid, before setting the extension
id ext->subset_ext_ids[j] in isainfo->isa.

Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Fixes: 0d8295ed97 ("riscv: add ISA extension parsing for scalar crypto")
Link: https://lore.kernel.org/r/20240502-cpufeature_fixes-v4-2-b3d1a088722d@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Charlie Jenkins
2024-05-02 21:50:51 -07:00
committed by Roxana Nicolescu
parent 255fcffd59
commit 93312eb4c4
1 changed files with 1 additions and 1 deletions
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arch/riscv/kernel/cpufeature.c
+1 -1
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@@ -616,7 +616,7 @@ static int __init riscv_fill_hwcap_from_ext_list(unsigned long *isa2hwcap)
if (ext->subset_ext_size) {
for (int j = 0; j < ext->subset_ext_size; j++) {
if (riscv_isa_extension_check(ext->subset_ext_ids[i]))
if (riscv_isa_extension_check(ext->subset_ext_ids[j]))
set_bit(ext->subset_ext_ids[j], isainfo->isa);
}
}