Brendan Jackman 981f94c3e9 bpf: Add bitwise atomic instructions ... This adds instructions for atomic[64]_[fetch_]and atomic[64]_[fetch_]or atomic[64]_[fetch_]xor All these operations are isomorphic enough to implement with the same verifier, interpreter, and x86 JIT code, hence being a single commit. The main interesting thing here is that x86 doesn't directly support the fetch_ version these operations, so we need to generate a CMPXCHG loop in the JIT. This requires the use of two temporary registers, IIUC it's safe to use BPF_REG_AX and x86's AUX_REG for this purpose. Signed-off-by: Brendan Jackman <jackmanb@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210114181751.768687-10-jackmanb@google.com		2021-01-14 18:34:29 -08:00
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preload
arraymap.c
bpf_inode_storage.c
bpf_iter.c
bpf_local_storage.c
bpf_lru_list.c
bpf_lru_list.h
bpf_lsm.c
bpf_struct_ops.c
bpf_struct_ops_types.h
bpf_task_storage.c
btf.c
cgroup.c
core.c	bpf: Add bitwise atomic instructions	2021-01-14 18:34:29 -08:00
cpumap.c
devmap.c
disasm.c	bpf: Add bitwise atomic instructions	2021-01-14 18:34:29 -08:00
disasm.h
dispatcher.c
hashtab.c
helpers.c
inode.c
local_storage.c
lpm_trie.c
Makefile
map_in_map.c
map_in_map.h
map_iter.c
net_namespace.c
offload.c
percpu_freelist.c
percpu_freelist.h
prog_iter.c
queue_stack_maps.c
reuseport_array.c
ringbuf.c
stackmap.c
syscall.c
sysfs_btf.c
task_iter.c
tnum.c
trampoline.c
verifier.c	bpf: Add bitwise atomic instructions	2021-01-14 18:34:29 -08:00