kernel/linux.git/arch/riscv/include/asm/archrandom.h, branch linux-7.0.yLinux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=linux-7.0.y2024-01-18T02:20:49+00:00RISC-V: Implement archrandom when Zkr is available2024-01-18T02:20:49+00:00Samuel Ortizsameo@rivosinc.com2023-11-30T11:17:02+00:00urn:sha1:10243401059287868a5651f869a2494368872add
The Zkr extension is ratified and provides 16 bits of entropy seed when
reading the SEED CSR.
We can implement arch_get_random_seed_longs() by doing multiple csrrw to
that CSR and filling an unsigned long with valid entropy bits.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Samuel Ortiz <sameo@rivosinc.com>
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Link: https://lore.kernel.org/r/20231130111704.1319081-1-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>