linux

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Pu Lehui dd642ccb45 riscv, bpf: Implement more atomic operations for RV64

This patch implement more BPF atomic operations for RV64. The newly
added operations are shown below:

  atomic[64]_[fetch_]add
  atomic[64]_[fetch_]and
  atomic[64]_[fetch_]or
  atomic[64]_xchg
  atomic[64]_cmpxchg

Since riscv specification does not provide AMO instruction for CAS
operation, we use lr/sc instruction for cmpxchg operation, and AMO
instructions for the rest ops.

Tests "test_bpf.ko" and "test_progs -t atomic" have passed, as well
as "test_verifier" with no new failure cases.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/bpf/20220410101246.232875-1-pulehui@huawei.com

2022-04-11 16:54:54 +02:00

boot

RISC-V Patches for the 5.18 Merge Window, Part 2

2022-04-01 13:31:57 -07:00

configs

RISC-V: K210 defconfigs: Drop redundant MEMBARRIER=n

2022-03-31 17:19:27 -07:00

errata

riscv: errata: alternative: mark vendor_patch_func __initdata

2022-01-09 11:02:46 -08:00

include

RISC-V Patches for the 5.18 Merge Window, Part 2