diff options
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 9e8a496fb284..403d7479c0bc 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -220,20 +220,10 @@ struct kvm_mpidr_data { static inline u16 kvm_mpidr_index(struct kvm_mpidr_data *data, u64 mpidr) { - unsigned long mask = data->mpidr_mask; - u64 aff = mpidr & MPIDR_HWID_BITMASK; - int nbits, bit, bit_idx = 0; - u16 index = 0; + unsigned long index = 0, mask = data->mpidr_mask; + unsigned long aff = mpidr & MPIDR_HWID_BITMASK; - /* - * If this looks like RISC-V's BEXT or x86's PEXT - * instructions, it isn't by accident. - */ - nbits = fls(mask); - for_each_set_bit(bit, &mask, nbits) { - index |= (aff & BIT(bit)) >> (bit - bit_idx); - bit_idx++; - } + bitmap_gather(&index, &aff, &mask, fls(mask)); return index; } |