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Josh Poimboeuf [this message] ` [PATCH v2 1/4] compiler.h: Make __ADDRESSABLE() symbol truly unique Josh Poimboeuf ` Ard Biesheuvel ` [PATCH v2 2/4] static_call: Add static call infrastructure Josh Poimboeuf ` [PATCH v2 3/4] x86/static_call: Add out-of-line static call implementation Josh Poimboeuf ` Peter Zijlstra ` Steven Rostedt ` [PATCH v2 4/4] x86/static_call: Add inline static call implementation for x86-64 Josh Poimboeuf ` Peter Zijlstra ` Josh Poimboeuf ` Josh Poimboeuf ` Peter Zijlstra ` Peter Zijlstra ` Josh Poimboeuf ` Peter Zijlstra ` Peter Zijlstra ` Andy Lutomirski ` Peter Zijlstra ` Josh Poimboeuf ` Andy Lutomirski ` Peter Zijlstra ` Jiri Kosina ` Josh Poimboeuf ` Peter Zijlstra ` Andy Lutomirski ` Josh Poimboeuf ` Peter Zijlstra ` Josh Poimboeuf ` Peter Zijlstra ` Andy Lutomirski ` Josh Poimboeuf ` Peter Zijlstra ` Steven Rostedt ` Steven Rostedt ` Andy Lutomirski ` Josh Poimboeuf ` Andy Lutomirski ` Steven Rostedt ` Josh Poimboeuf ` Linus Torvalds ` Steven Rostedt ` Andy Lutomirski ` Peter Zijlstra ` Andy Lutomirski ` Jiri Kosina ` Steven Rostedt ` Linus Torvalds ` Steven Rostedt ` Linus Torvalds ` Linus Torvalds ` Steven Rostedt ` Linus Torvalds ` Steven Rostedt ` Linus Torvalds ` Linus Torvalds ` Linus Torvalds ` Pavel Machek ` Linus Torvalds ` Steven Rostedt ` Andy Lutomirski ` Josh Poimboeuf ` Josh Poimboeuf ` Linus Torvalds ` Josh Poimboeuf ` David Laight ` Josh Poimboeuf ` Josh Poimboeuf ` Andy Lutomirski ` Josh Poimboeuf ` Linus Torvalds ` Andy Lutomirski ` Steven Rostedt ` Andy Lutomirski ` Steven Rostedt ` Jiri Kosina ` Josh Poimboeuf ` Steven Rostedt ` Josh Poimboeuf ` Steven Rostedt ` Rasmus Villemoes ` Josh Poimboeuf ` Linus Torvalds ` Andy Lutomirski ` Steven Rostedt ` Josh Poimboeuf ` Andy Lutomirski ` Linus Torvalds ` Steven Rostedt ` Linus Torvalds ` Andy Lutomirski ` Andy Lutomirski ` Josh Poimboeuf ` Peter Zijlstra ` Peter Zijlstra ` Ard Biesheuvel ` Andy Lutomirski ` Peter Zijlstra ` Josh Poimboeuf ` [PATCH v2 0/4] Static calls Josh Poimboeuf ` Steven Rostedt ` Josh Poimboeuf ` Steven Rostedt ` Steven Rostedt ` Andy Lutomirski ` Josh Poimboeuf ` Andy Lutomirski ` Edward Cree ` Edward Cree ` Josh Poimboeuf ` Nadav Amit ` Edward Cree ` [RFC/WIP PATCH 0/2] dynamic calls Edward Cree ` [RFC PATCH 1/2] static_call: fix out-of-line static call implementation Edward Cree ` [RFC PATCH 2/2] net: core: rather hacky PoC implementation of dynamic calls Edward Cree ` [PATCH v2 0/4] Static calls Nadav Amit ` Edward Cree ` Nadav Amit ` Edward Cree ` Nadav Amit ` Pavel Machek
| From: | Josh Poimboeuf <jpoimboe-AT-redhat.com> | |
| To: | x86-AT-kernel.org | |
| Subject: | [PATCH v2 0/4] Static calls | |
| Date: | Mon, 26 Nov 2018 07:54:56 -0600 | |
| Message-ID: | <cover.1543200841.git.jpoimboe@redhat.com> | |
| Cc: | linux-kernel-AT-vger.kernel.org, Ard Biesheuvel <ard.biesheuvel-AT-linaro.org>, Andy Lutomirski <luto-AT-kernel.org>, Steven Rostedt <rostedt-AT-goodmis.org>, Peter Zijlstra <peterz-AT-infradead.org>, Ingo Molnar <mingo-AT-kernel.org>, Thomas Gleixner <tglx-AT-linutronix.de>, Linus Torvalds <torvalds-AT-linux-foundation.org>, Masami Hiramatsu <mhiramat-AT-kernel.org>, Jason Baron <jbaron-AT-akamai.com>, Jiri Kosina <jkosina-AT-suse.cz>, David Laight <David.Laight-AT-ACULAB.COM>, Borislav Petkov <bp-AT-alien8.de>, Julia Cartwright <julia-AT-ni.com>, Jessica Yu <jeyu-AT-kernel.org>, "H. Peter Anvin" <hpa-AT-zytor.com> |
v2: - fix STATIC_CALL_TRAMP() macro by using __PASTE() [Ard] - rename optimized/unoptimized -> inline/out-of-line [Ard] - tweak arch interfaces for PLT and add key->tramp field [Ard] - rename 'poison' to 'defuse' and do it after all sites have been patched [Ard] - fix .init handling [Ard, Steven] - add CONFIG_HAVE_STATIC_CALL [Steven] - make interfaces more consistent across configs to allow tracepoints to use them [Steven] - move __ADDRESSABLE() to static_call() macro [Steven] - prevent 2-byte jumps [Steven] - add offset to asm-offsets.c instead of hard coding key->func offset - add kernel_text_address() sanity check - make __ADDRESSABLE() symbols truly unique TODO: - port Ard's arm64 patches to the new arch interfaces - tracepoint performance testing -------------------- These patches are related to two similar patch sets from Ard and Steve: - https://lkml.kernel.org/r/20181005081333.15018-1-ard.bies... - https://lkml.kernel.org/r/20181006015110.653946300@goodmi... The code is also heavily inspired by the jump label code, as some of the concepts are very similar. There are three separate implementations, depending on what the arch supports: 1) CONFIG_HAVE_STATIC_CALL_INLINE: patched call sites - requires objtool and a small amount of arch code 2) CONFIG_HAVE_STATIC_CALL_OUTLINE: patched trampolines - requires a small amount of arch code 3) If no arch support, fall back to regular function pointers Josh Poimboeuf (4): compiler.h: Make __ADDRESSABLE() symbol truly unique static_call: Add static call infrastructure x86/static_call: Add out-of-line static call implementation x86/static_call: Add inline static call implementation for x86-64 arch/Kconfig | 10 + arch/x86/Kconfig | 4 +- arch/x86/include/asm/static_call.h | 52 +++ arch/x86/kernel/Makefile | 1 + arch/x86/kernel/asm-offsets.c | 6 + arch/x86/kernel/static_call.c | 78 ++++ include/asm-generic/vmlinux.lds.h | 11 + include/linux/compiler.h | 2 +- include/linux/module.h | 10 + include/linux/static_call.h | 202 ++++++++++ include/linux/static_call_types.h | 19 + kernel/Makefile | 1 + kernel/module.c | 5 + kernel/static_call.c | 350 ++++++++++++++++++ tools/objtool/Makefile | 3 +- tools/objtool/check.c | 126 ++++++- tools/objtool/check.h | 2 + tools/objtool/elf.h | 1 + .../objtool/include/linux/static_call_types.h | 19 + tools/objtool/sync-check.sh | 1 + 20 files changed, 899 insertions(+), 4 deletions(-) create mode 100644 arch/x86/include/asm/static_call.h create mode 100644 arch/x86/kernel/static_call.c create mode 100644 include/linux/static_call.h create mode 100644 include/linux/static_call_types.h create mode 100644 kernel/static_call.c create mode 100644 tools/objtool/include/linux/static_call_types.h -- 2.17.2
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