talos-obmc-linux/drivers/net/ethernet/netronome, branch dev-5.0

nfp: bpf: fix ALU32 high bits clearance bug

2019-02-22T23:07:47+00:00

NFP BPF JIT compiler is doing a couple of small optimizations when jitting ALU imm instructions, some of these optimizations could save code-gen, for example: A & -1 = A A | 0 = A A ^ 0 = A However, for ALU32, high 32-bit of the 64-bit register should still be cleared according to ISA semantics. Fixes: cd7df56ed3e6 ("nfp: add BPF to NFP code translator") Reviewed-by: Jakub Kicinski Signed-off-by: Jiong Wang Signed-off-by: Daniel Borkmann

nfp: bpf: fix code-gen bug on BPF_ALU | BPF_XOR | BPF_K

2019-02-22T23:07:47+00:00

The intended optimization should be A ^ 0 = A, not A ^ -1 = A. Fixes: cd7df56ed3e6 ("nfp: add BPF to NFP code translator") Reviewed-by: Jakub Kicinski Signed-off-by: Jiong Wang Signed-off-by: Daniel Borkmann

cross-tree: phase out dma_zalloc_coherent()

2019-01-08T12:58:37+00:00

We already need to zero out memory for dma_alloc_coherent(), as such using dma_zalloc_coherent() is superflous. Phase it out. This change was generated with the following Coccinelle SmPL patch: @ replace_dma_zalloc_coherent @ expression dev, size, data, handle, flags; @@ -dma_zalloc_coherent(dev, size, handle, flags) +dma_alloc_coherent(dev, size, handle, flags) Suggested-by: Christoph Hellwig Signed-off-by: Luis Chamberlain [hch: re-ran the script on the latest tree] Signed-off-by: Christoph Hellwig

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2018-12-21T01:31:36+00:00

Daniel Borkmann says: ==================== pull-request: bpf-next 2018-12-21 The following pull-request contains BPF updates for your *net-next* tree. There is a merge conflict in test_verifier.c. Result looks as follows: [...] }, { "calls: cross frame pruning", .insns = { [...] .prog_type = BPF_PROG_TYPE_SOCKET_FILTER, .errstr_unpriv = "function calls to other bpf functions are allowed for root only", .result_unpriv = REJECT, .errstr = "!read_ok", .result = REJECT, }, { "jset: functional", .insns = { [...] { "jset: unknown const compare not taken", .insns = { BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32), BPF_JMP_IMM(BPF_JSET, BPF_REG_0, 1, 1), BPF_LDX_MEM(BPF_B, BPF_REG_8, BPF_REG_9, 0), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_SOCKET_FILTER, .errstr_unpriv = "!read_ok", .result_unpriv = REJECT, .errstr = "!read_ok", .result = REJECT, }, [...] { "jset: range", .insns = { [...] }, .prog_type = BPF_PROG_TYPE_SOCKET_FILTER, .result_unpriv = ACCEPT, .result = ACCEPT, }, The main changes are: 1) Various BTF related improvements in order to get line info working. Meaning, verifier will now annotate the corresponding BPF C code to the error log, from Martin and Yonghong. 2) Implement support for raw BPF tracepoints in modules, from Matt. 3) Add several improvements to verifier state logic, namely speeding up stacksafe check, optimizations for stack state equivalence test and safety checks for liveness analysis, from Alexei. 4) Teach verifier to make use of BPF_JSET instruction, add several test cases to kselftests and remove nfp specific JSET optimization now that verifier has awareness, from Jakub. 5) Improve BPF verifier's slot_type marking logic in order to allow more stack slot sharing, from Jiong. 6) Add sk_msg->size member for context access and add set of fixes and improvements to make sock_map with kTLS usable with openssl based applications, from John. 7) Several cleanups and documentation updates in bpftool as well as auto-mount of tracefs for "bpftool prog tracelog" command, from Quentin. 8) Include sub-program tags from now on in bpf_prog_info in order to have a reliable way for user space to get all tags of the program e.g. needed for kallsyms correlation, from Song. 9) Add BTF annotations for cgroup_local_storage BPF maps and implement bpf fs pretty print support, from Roman. 10) Fix bpftool in order to allow for cross-compilation, from Ivan. 11) Update of bpftool license to GPLv2-only + BSD-2-Clause in order to be compatible with libbfd and allow for Debian packaging, from Jakub. 12) Remove an obsolete prog->aux sanitation in dump and get rid of version check for prog load, from Daniel. 13) Fix a memory leak in libbpf's line info handling, from Prashant. 14) Fix cpumap's frame alignment for build_skb() so that skb_shared_info does not get unaligned, from Jesper. 15) Fix test_progs kselftest to work with older compilers which are less smart in optimizing (and thus throwing build error), from Stanislav. 16) Cleanup and simplify AF_XDP socket teardown, from Björn. 17) Fix sk lookup in BPF kselftest's test_sock_addr with regards to netns_id argument, from Andrey. ==================== Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2018-12-20T19:53:36+00:00

Lots of conflicts, by happily all cases of overlapping changes, parallel adds, things of that nature. Thanks to Stephen Rothwell, Saeed Mahameed, and others for their guidance in these resolutions. Signed-off-by: David S. Miller

nfp: bpf: optimize codegen for JSET with a constant

2018-12-20T16:28:29+00:00

The top word of the constant can only have bits set if sign extension set it to all-1, therefore we don't really have to mask the top half of the register. We can just OR it into the result as is. Signed-off-by: Jakub Kicinski Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann

nfp: bpf: remove the trivial JSET optimization

2018-12-20T16:28:28+00:00

The verifier will now understand the JSET instruction, so don't mark the dead branch in the JIT as noop. We won't generate any code, anyway. Signed-off-by: Jakub Kicinski Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann

nfp: flower: fix cb_ident duplicate in indirect block register

2018-12-18T07:34:12+00:00

Previously the identifier used for indirect block callback registry and for block rule cb registry (when done via indirect blocks) was the pointer to the netdev we were interested in receiving updates on. This worked fine if a single app existed that registered one callback per netdev of interest. However, if multiple cards are in place and, in turn, multiple apps, then each app may register the same callback with the same identifier to both the netdev's indirect block cb list and to a block's cb list. This can lead to EEXIST errors and/or incorrect cb deletions. Prevent this conflict by using the app pointer as the identifier for netdev indirect block cb registry, allowing each app to register a unique callback per netdev. For block cb registry, the same app may register multiple cbs to the same block if using TC shared blocks. Instead of the app, use the pointer to the allocated cb_priv data as the identifier here. This means that there can be a unique block callback for each app/netdev combo. Fixes: 3166dd07a9cb ("nfp: flower: offload tunnel decap rules via indirect TC blocks") Reported-by: Edward Cree Signed-off-by: John Hurley Reviewed-by: Jakub Kicinski Signed-off-by: David S. Miller

nfp: abm: allow to opt-out of RED offload

2018-12-16T20:41:42+00:00

FW team asks to be able to not support RED even if NIC is capable of buffering for testing and experimentation. Add an opt-out flag. Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2018-12-11T02:00:43+00:00

Daniel Borkmann says: ==================== pull-request: bpf-next 2018-12-11 The following pull-request contains BPF updates for your *net-next* tree. It has three minor merge conflicts, resolutions: 1) tools/testing/selftests/bpf/test_verifier.c Take first chunk with alignment_prevented_execution. 2) net/core/filter.c [...] case bpf_ctx_range_ptr(struct __sk_buff, flow_keys): case bpf_ctx_range(struct __sk_buff, wire_len): return false; [...] 3) include/uapi/linux/bpf.h Take the second chunk for the two cases each. The main changes are: 1) Add support for BPF line info via BTF and extend libbpf as well as bpftool's program dump to annotate output with BPF C code to facilitate debugging and introspection, from Martin. 2) Add support for BPF_ALU | BPF_ARSH | BPF_{K,X} in interpreter and all JIT backends, from Jiong. 3) Improve BPF test coverage on archs with no efficient unaligned access by adding an "any alignment" flag to the BPF program load to forcefully disable verifier alignment checks, from David. 4) Add a new bpf_prog_test_run_xattr() API to libbpf which allows for proper use of BPF_PROG_TEST_RUN with data_out, from Lorenz. 5) Extend tc BPF programs to use a new __sk_buff field called wire_len for more accurate accounting of packets going to wire, from Petar. 6) Improve bpftool to allow dumping the trace pipe from it and add several improvements in bash completion and map/prog dump, from Quentin. 7) Optimize arm64 BPF JIT to always emit movn/movk/movk sequence for kernel addresses and add a dedicated BPF JIT backend allocator, from Ard. 8) Add a BPF helper function for IR remotes to report mouse movements, from Sean. 9) Various cleanups in BPF prog dump e.g. to make UAPI bpf_prog_info member naming consistent with existing conventions, from Yonghong and Song. 10) Misc cleanups and improvements in allowing to pass interface name via cmdline for xdp1 BPF example, from Matteo. 11) Fix a potential segfault in BPF sample loader's kprobes handling, from Daniel T. 12) Fix SPDX license in libbpf's README.rst, from Andrey. ==================== Signed-off-by: David S. Miller