Changes in Makefile

51c66ad8 - powerpc/bpf: Implement extended BPF on PPC32

Mon, 22 Mar 2021 16:37:52 +0000

powerpc/bpf: Implement extended BPF on PPC32Implement Extended Berkeley Packet Filter on Powerpc 32Test result with test_bpf module: test_bpf: Summary: 378 PASSED, 0 FAILED, [354/366 JIT'ed]Registers mapping: [BPF_REG_0] = r11-r12 /* function arguments */ [BPF_REG_1] = r3-r4 [BPF_REG_2] = r5-r6 [BPF_REG_3] = r7-r8 [BPF_REG_4] = r9-r10 [BPF_REG_5] = r21-r22 (Args 9 and 10 come in via the stack) /* non volatile registers */ [BPF_REG_6] = r23-r24 [BPF_REG_7] = r25-r26 [BPF_REG_8] = r27-r28 [BPF_REG_9] = r29-r30 /* frame pointer aka BPF_REG_10 */ [BPF_REG_FP] = r17-r18 /* eBPF jit internal registers */ [BPF_REG_AX] = r19-r20 [TMP_REG] = r31As PPC32 doesn't have a redzone in the stack, a stack frame must alwaysbe set in order to host at least the tail count counter.The stack frame remains for tail calls, it is set by the first calleeand freed by the last callee.r0 is used as temporary register as much as possible. It is referenceddirectly in the code in order to avoid misusing it, because someinstructions interpret it as value 0 instead of register r0(ex: addi, addis, stw, lwz, ...)The following operations are not implemented: case BPF_ALU64 | BPF_DIV | BPF_X: /* dst /= src */ case BPF_ALU64 | BPF_MOD | BPF_X: /* dst %= src */ case BPF_STX | BPF_XADD | BPF_DW: /* *(u64 *)(dst + off) += src */The following operations are only implemented for power of two constants: case BPF_ALU64 | BPF_MOD | BPF_K: /* dst %= imm */ case BPF_ALU64 | BPF_DIV | BPF_K: /* dst /= imm */Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/61d8b149176ddf99e7d5cef0b6dc1598583ca202.1616430991.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/net/Makefile

4ea76e90 - powerpc/bpf: Move common functions into bpf_jit_comp.c

Mon, 22 Mar 2021 16:37:49 +0000

powerpc/bpf: Move common functions into bpf_jit_comp.cMove into bpf_jit_comp.c the functions that will remain common toPPC64 and PPC32 when we add support of EBPF for PPC32.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/2c339d77fb168ef12b213ccddfee3cb6c8ce8ae1.1616430991.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/net/Makefile

6944caad - powerpc/bpf: Remove classical BPF support for PPC32

Mon, 22 Mar 2021 16:37:46 +0000

powerpc/bpf: Remove classical BPF support for PPC32At the time being, PPC32 has Classical BPF support.The test_bpf module exhibits some failure: test_bpf: #298 LD_IND byte frag jited:1 ret 202 != 66 FAIL (1 times) test_bpf: #299 LD_IND halfword frag jited:1 ret 51958 != 17220 FAIL (1 times) test_bpf: #301 LD_IND halfword mixed head/frag jited:1 ret 51958 != 1305 FAIL (1 times) test_bpf: #303 LD_ABS byte frag jited:1 ret 202 != 66 FAIL (1 times) test_bpf: #304 LD_ABS halfword frag jited:1 ret 51958 != 17220 FAIL (1 times) test_bpf: #306 LD_ABS halfword mixed head/frag jited:1 ret 51958 != 1305 FAIL (1 times) test_bpf: Summary: 371 PASSED, 7 FAILED, [119/366 JIT'ed]Fixing this is not worth the effort. Instead, remove support forclassical BPF and prepare for adding Extended BPF support instead.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/fbc3e4fcc9c8f6131d6c705212530b2aa50149ee.1616430991.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/net/Makefile

badf436f - powerpc/Makefiles: Convert ifeq to ifdef where possible

Mon, 06 Aug 2018 16:42:03 +0000

powerpc/Makefiles: Convert ifeq to ifdef where possibleIn Makefiles if we're testing a CONFIG_FOO symbol for equality with 'y'we can instead just use ifdef. The latter reads easily, so convert toit where possible.Signed-off-by: Rodrigo R. Galvao Reviewed-by: Mauro S. M. Rodrigues Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/net/Makefile

dbf44daf - bpf, ppc64: remove ld_abs/ld_ind

Thu, 03 May 2018 23:08:21 +0000

bpf, ppc64: remove ld_abs/ld_indSince LD_ABS/LD_IND instructions are now removed from the core andreimplemented through a combination of inlined BPF instructions anda slow-path helper, we can get rid of the complexity from ppc64 JIT.Signed-off-by: Daniel Borkmann Acked-by: Naveen N. Rao Acked-by: Alexei Starovoitov Tested-by: Sandipan Das Signed-off-by: Alexei Starovoitov List of files: /linux-6.15/arch/powerpc/net/Makefile

b2441318 - License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Wed, 01 Nov 2017 14:07:57 +0000

License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseMany source files in the tree are missing licensing information, whichmakes it harder for compliance tools to determine the correct license.By default all files without license information are under the defaultlicense of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'SPDX license identifier. The SPDX identifier is a legally bindingshorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart andPhilippe Ombredanne.How this work was done:Patches were generated and checked against linux-4.14-rc6 for a subset ofthe use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up caseswhere non-standard license headers were used, and references to licensehad to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied toa file was done in a spreadsheet of side by side results from of theoutput of two independent scanners (ScanCode & Windriver) producing SPDXtag:value files created by Philippe Ombredanne. Philippe prepared thebase worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 filesassessed. Kate Stewart did a file by file comparison of the scannerresults in the spreadsheet to determine which SPDX license identifier(s)to be applied to the file. She confirmed any determination that was notimmediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines).All documentation files were explicitly excluded.The following heuristics were used to determine which SPDX licenseidentifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time.In total, over 70 hours of logged manual review was done on thespreadsheet to determine the SPDX license identifiers to apply to thesource files by Kate, Philippe, Thomas and, in some cases, confirmationby lawyers working with the Linux Foundation.Kate also obtained a third independent scan of the 4.13 code base fromFOSSology, and compared selected files where the other two scannersdisagreed against that SPDX file, to see if there was new insights. TheWindriver scanner is based on an older version of FOSSology in part, sothey are related.Thomas did random spot checks in about 500 files from the spreadsheetsfor the uapi headers and agreed with SPDX license identifier in thefiles he inspected. For the non-uapi files Thomas did random spot checksin about 15000 files.In initial set of patches against 4.14-rc6, 3 files were found to havecopy/paste license identifier errors, and have been fixed to reflect thecorrect identifier.Additionally Philippe spent 10 hours this week doing a detailed manualinspection and review of the 12,461 patched files from the initial patchversion early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correctThis produced a worksheet with 20 files needing minor correction. Thisworksheet was then exported into 3 different .csv files for thedifferent types of files to be modified.These .csv files were then reviewed by Greg. Thomas wrote a script toparse the csv files and add the proper SPDX tag to the file, in theformat that the file expected. This script was further refined by Gregbased on the output to detect more types of files automatically and todistinguish between header and source .c files (which need differentcomment types.) Finally Greg ran the script using the .csv files togenerate the patches.Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/powerpc/net/Makefile

156d0e29 - powerpc/ebpf/jit: Implement JIT compiler for extended BPF

Wed, 22 Jun 2016 16:25:07 +0000

powerpc/ebpf/jit: Implement JIT compiler for extended BPFPPC64 eBPF JIT compiler.Enable with: echo 1 > /proc/sys/net/core/bpf_jit_enableor echo 2 > /proc/sys/net/core/bpf_jit_enable... to see the generated JIT code. This can further be processed withtools/net/bpf_jit_disasm.With CONFIG_TEST_BPF=m and 'modprobe test_bpf': test_bpf: Summary: 305 PASSED, 0 FAILED, [297/297 JIT'ed]... on both ppc64 BE and LE.The details of the approach are documented through various comments inthe code.Acked-by: Alexei Starovoitov Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/net/Makefile

2ddadeab - ppc: bpf: rename bpf_jit_64.S to bpf_jit_asm.S

Tue, 17 Feb 2015 07:04:41 +0000

ppc: bpf: rename bpf_jit_64.S to bpf_jit_asm.SSigned-off-by: Denis Kirjanov Signed-off-by: David S. Miller List of files: /linux-6.15/arch/powerpc/net/Makefile

0ca87f05 - net: filter: BPF 'JIT' compiler for PPC64

Wed, 20 Jul 2011 15:51:00 +0000

net: filter: BPF 'JIT' compiler for PPC64An implementation of a code generator for BPF programs to speed up packetfiltering on PPC64, inspired by Eric Dumazet's x86-64 version.Filter code is generated as an ABI-compliant function in module_alloc()'d memwith stackframe & prologue/epilogue generated if required (simple filters don'tneed anything more than an li/blr). The filter's local variables, M[], live inregisters. Supports all BPF opcodes, although "complicated" loads from negativepacket offsets (e.g. SKF_LL_OFF) are not yet supported.There are a couple of further optimisations left for future work; many-passassembly with branch-reach reduction and a register allocator to push M[]variables into volatile registers would improve the code quality further.This currently supports big-endian 64-bit PowerPC only (but is fairly simpleto port to PPC32 or LE!).Enabled in the same way as x86-64: echo 1 > /proc/sys/net/core/bpf_jit_enableOr, enabled with extra debug output: echo 2 > /proc/sys/net/core/bpf_jit_enableSigned-off-by: Matt Evans Acked-by: Eric Dumazet Signed-off-by: David S. Miller List of files: /linux-6.15/arch/powerpc/net/Makefile