Kumar Kartikeya Dwivedi a50388dbb3 bpf: Support constant scalar arguments for kfuncs ... Allow passing known constant scalars as arguments to kfuncs that do not represent a size parameter. We use mark_chain_precision for the constant scalar argument to mark it precise. This makes the search pruning optimization of verifier more conservative for such kfunc calls, and each non-distinct argument is considered unequivalent. We will use this support to then expose a bpf_obj_new function where it takes the local type ID of a type in program BTF, and returns a PTR_TO_BTF_ID | MEM_ALLOC to the local type, and allows programs to allocate their own objects. Each type ID resolves to a distinct type with a possibly distinct size, hence the type ID constant matters in terms of program safety and its precision needs to be checked between old and cur states inside regsafe. The use of mark_chain_precision enables this. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20221118015614.2013203-13-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2022-11-17 19:22:13 -08:00
..
libbpf	bpf, docs: Remove deprecated xsk libbpf APIs description	2022-07-08 14:18:50 +02:00
bpf_design_QA.rst	bpf: Remove local kptr references in documentation	2022-11-14 21:52:45 -08:00
bpf_devel_QA.rst	bpf/docs: Include blank lines between bullet points in bpf_devel_QA.rst	2022-11-17 16:26:42 +01:00
bpf_licensing.rst	bpf: Document BPF licensing.	2021-09-22 23:13:13 +02:00
bpf_prog_run.rst	Documentation/bpf: Add documentation for BPF_PROG_RUN	2022-03-09 14:19:22 -08:00
btf.rst	docs/bpf: Update documentation for BTF_KIND_FUNC	2022-07-19 09:42:09 -07:00
clang-notes.rst	bpf, docs: Add Clang note about BPF_ALU	2022-09-30 13:41:25 -07:00
classic_vs_extended.rst	bpf, docs: Split the comparism to classic BPF from instruction-set.rst	2021-12-30 16:31:44 -08:00
drgn.rst	bpf: Document bpf_inspect drgn tool	2020-03-26 00:08:36 +01:00
faq.rst	bpf, docs: Fix ordering of bpf documentation	2021-11-17 23:24:01 +01:00
helpers.rst	bpf, docs: Fix ordering of bpf documentation	2021-11-17 23:24:01 +01:00
index.rst	Documentation: bpf: Add implementation notes documentations to table of contents	2022-10-03 09:16:52 -07:00
instruction-set.rst	Networking changes for 6.1.	2022-10-04 13:38:03 -07:00
kfuncs.rst	bpf: Support constant scalar arguments for kfuncs	2022-11-17 19:22:13 -08:00
linux-notes.rst	bpf, docs: Delete misformatted table.	2022-10-01 08:51:26 -07:00
llvm_reloc.rst	bpf, docs: Add llvm_reloc.rst to explain llvm bpf relocations	2021-05-28 22:12:04 +02:00
map_array.rst	docs/bpf: Fix sample code in MAP_TYPE_ARRAY docs	2022-11-15 21:33:47 -08:00
map_cgroup_storage.rst	Remove duplicate words inside documentation	2022-09-27 13:21:43 -06:00
map_cgrp_storage.rst	docs/bpf: Add documentation for new cgroup local storage	2022-10-25 23:19:20 -07:00
map_cpumap.rst	bpf, docs: Fixup cpumap sphinx >= 3.1 warning	2022-11-14 19:10:57 +01:00
map_hash.rst	bpf, docs: document BPF_MAP_TYPE_HASH and variants	2022-07-19 10:38:03 -07:00
map_lpm_trie.rst	docs/bpf: Document BPF_MAP_TYPE_LPM_TRIE map	2022-11-11 11:32:49 -08:00
map_of_maps.rst	docs/bpf: Document BPF ARRAY_OF_MAPS and HASH_OF_MAPS	2022-11-11 11:32:54 -08:00
map_queue_stack.rst	docs/bpf: Document BPF map types QUEUE and STACK	2022-11-11 11:34:39 -08:00
maps.rst	bpf, docs: Reformat BPF maps page to be more readable	2022-10-20 18:53:34 -07:00
other.rst	bpf, docs: Fix ordering of bpf documentation	2021-11-17 23:24:01 +01:00
prog_cgroup_sockopt.rst	bpf: Document optval > PAGE_SIZE behavior for sockopt hooks	2020-06-17 10:54:05 -07:00
prog_cgroup_sysctl.rst	bpf: Document BPF_PROG_TYPE_CGROUP_SYSCTL	2019-04-18 16:05:36 -07:00
prog_flow_dissector.rst	bpf/flow_dissector: add mode to enforce global BPF flow dissector	2019-10-07 20:16:33 -07:00
prog_lsm.rst	bpf, docs: Rename bpf_lsm.rst to prog_lsm.rst	2021-11-17 23:23:58 +01:00
prog_sk_lookup.rst	bpf: sk_lookup: Add user documentation	2020-08-24 14:46:50 -07:00
programs.rst	bpf, docs: Fix ordering of bpf documentation	2021-11-17 23:24:01 +01:00
ringbuf.rst	docs/bpf: Remove source code links	2020-09-14 18:46:54 -07:00
s390.rst	bpf: Add s390 testing documentation	2019-10-30 16:25:31 +01:00
syscall_api.rst	bpf, docs: Fix ordering of bpf documentation	2021-11-17 23:24:01 +01:00
test_debug.rst	bpf, docs: Fix ordering of bpf documentation	2021-11-17 23:24:01 +01:00
verifier.rst	bpf, docs: Add a missing colon in verifier.rst	2022-02-28 18:20:35 +01:00