From patchwork Thu Jun 20 18:54:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naveen N Rao X-Patchwork-Id: 13706252 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 69836381B9; Thu, 20 Jun 2024 18:57:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718909839; cv=none; b=AxvGCkZnv+ugOGslO8sMi4eGH/b4lct7WSXNQ7PoxGq8ZFQhG1D8AV3K9kEccvPnGno4U8QlpKzlR3mReXdfZ37H3d+LlGHzjjPQ2ynIWA4mgUxizUjjfEUq7XiBAFxCefrScp2Tpb1iKagw0RAXarJtLhZC9eEzp5R5/T235js= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718909839; c=relaxed/simple; bh=0nrN+oIc4sLMs0HNchgdz1IvGpOv0OVXQS/bQIadZQM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=devfZ6Jih+1b+ox4tXip4RLtll96FoJ4Dd6HyOHGyzfLx1C7CZUVEHfScGf6CDIOh4R3mj1pkRDgV9sHV9H94dVG1/+ztv4zPdNNaK8Vaum9kN2xplH9PACSe1qZ7r+MOqOqKMjljXNus6BnfXhtSaboRI2vFXMA29mgSrHssII= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=vQRI90gx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="vQRI90gx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3CC1AC2BD10; Thu, 20 Jun 2024 18:57:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718909838; bh=0nrN+oIc4sLMs0HNchgdz1IvGpOv0OVXQS/bQIadZQM=; h=From:To:Cc:Subject:Date:From; b=vQRI90gxFnkz9q3F1uLt0YM/SGrgfXK7OBl6Iodsu1iPSMtejIRuZgQGcKAMotSOj z06K8PmZ5t/qxDgGK9XGz05lMvDlxIpt0qABsY+jIAnv6brReu2WsEBlWgbzMDpoVm ZSk7YiZeR5/g8ZUqNEriOfB2zuEckdtF3oe9TK57tH5feg2BZkjxlhMXEt7xb0aCtl AgnzrXHX10ac9VFVoP/dhX74RCySCb5T/anOCm25wrT6uLN2IeKchfHv1EiBRnx04W AfLeLxEbeO2WtcWmXLRe/mxsGm8NQzktVs5Y0R12btt+Ge4b7b1Q5jlCT6B0N/HnJ3 Nug0BXp20eV6Q== From: Naveen N Rao To: , , Cc: Michael Ellerman , Steven Rostedt , Masami Hiramatsu , Nicholas Piggin , Christophe Leroy , Masahiro Yamada , Mark Rutland , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Song Liu , Jiri Olsa Subject: [RFC PATCH v3 00/11] powerpc: Add support for ftrace direct and BPF trampolines Date: Fri, 21 Jun 2024 00:24:03 +0530 Message-ID: X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-State: RFC This is v3 of the patches posted here: http://lkml.kernel.org/r/cover.1718008093.git.naveen@kernel.org Since v2, I have addressed review comments from Steven and Masahiro along with a few fixes. Patches 7-11 are new in this series and add support for ftrace direct and bpf trampolines. This series depends on the patch series from Benjamin Gray adding support for patch_ulong(): http://lkml.kernel.org/r/20240515024445.236364-1-bgray@linux.ibm.com - Naveen Naveen N Rao (11): powerpc/kprobes: Use ftrace to determine if a probe is at function entry powerpc/ftrace: Unify 32-bit and 64-bit ftrace entry code powerpc/module_64: Convert #ifdef to IS_ENABLED() powerpc/ftrace: Remove pointer to struct module from dyn_arch_ftrace kbuild: Add generic hook for architectures to use before the final vmlinux link powerpc64/ftrace: Move ftrace sequence out of line powerpc/ftrace: Add support for DYNAMIC_FTRACE_WITH_CALL_OPS powerpc/ftrace: Add support for DYNAMIC_FTRACE_WITH_DIRECT_CALLS samples/ftrace: Add support for ftrace direct samples on powerpc powerpc64/bpf: Fold bpf_jit_emit_func_call_hlp() into bpf_jit_emit_func_call_rel() powerpc64/bpf: Add support for bpf trampolines arch/Kconfig | 3 + arch/powerpc/Kconfig | 9 + arch/powerpc/Makefile | 8 + arch/powerpc/include/asm/ftrace.h | 29 +- arch/powerpc/include/asm/module.h | 5 + arch/powerpc/include/asm/ppc-opcode.h | 14 + arch/powerpc/kernel/asm-offsets.c | 11 + arch/powerpc/kernel/kprobes.c | 18 +- arch/powerpc/kernel/module_64.c | 67 +- arch/powerpc/kernel/trace/ftrace.c | 269 +++++++- arch/powerpc/kernel/trace/ftrace_64_pg.c | 73 +- arch/powerpc/kernel/trace/ftrace_entry.S | 210 ++++-- arch/powerpc/kernel/vmlinux.lds.S | 3 +- arch/powerpc/net/bpf_jit.h | 11 + arch/powerpc/net/bpf_jit_comp.c | 702 +++++++++++++++++++- arch/powerpc/net/bpf_jit_comp32.c | 7 +- arch/powerpc/net/bpf_jit_comp64.c | 68 +- arch/powerpc/tools/Makefile | 10 + arch/powerpc/tools/gen-ftrace-pfe-stubs.sh | 49 ++ samples/ftrace/ftrace-direct-modify.c | 85 ++- samples/ftrace/ftrace-direct-multi-modify.c | 101 ++- samples/ftrace/ftrace-direct-multi.c | 79 ++- samples/ftrace/ftrace-direct-too.c | 83 ++- samples/ftrace/ftrace-direct.c | 69 +- scripts/Makefile.vmlinux | 8 + scripts/link-vmlinux.sh | 11 +- 26 files changed, 1813 insertions(+), 189 deletions(-) create mode 100644 arch/powerpc/tools/Makefile create mode 100755 arch/powerpc/tools/gen-ftrace-pfe-stubs.sh base-commit: e2b06d707dd067509cdc9ceba783c06fa6a551c2 prerequisite-patch-id: a1d50e589288239d5a8b1c1f354cd4737057c9d3 prerequisite-patch-id: da4142d56880861bd0ad7ad7087c9e2670a2ee54 prerequisite-patch-id: 609d292e054b2396b603890522a940fa0bdfb6d8 prerequisite-patch-id: 6f7213fb77b1260defbf43be0e47bff9c80054cc prerequisite-patch-id: ad3b71bf071ae4ba1bee5b087e61a2055772a74f