From: Peter Zijlstra <peterz@infradead.org>
To: David Woodhouse <dwmw2@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>
Cc: linux-kernel@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
Ashok Raj <ashok.raj@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Tim Chen <tim.c.chen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Greg KH <gregkh@linuxfoundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Arjan Van De Ven <arjan.van.de.ven@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Jun Nakajima <jun.nakajima@intel.com>,
Asit Mallick <asit.k.mallick@intel.com>,
Peter Zijlstra <peterz@infradead.org>
Subject: [PATCH v2 00/10] objtool validation of static branches and retpoline
Date: Tue, 16 Jan 2018 15:28:25 +0100 [thread overview]
Message-ID: <20180116142825.376986833@infradead.org> (raw)
Because dwmw2 is a wee bit paranoid and GCC has a history of being slightly
retarded at times; here are a few patches that validate it will in fact
generate sensible code for static branches.
Also, per dwmw2's request, code to validate retpoline code does not include
dynamic jump or calls.
---
arch/x86/include/asm/alternative-asm.h | 3 +-
arch/x86/include/asm/alternative.h | 7 +-
arch/x86/include/asm/cpufeature.h | 82 ++++++------
arch/x86/include/asm/jump_label.h | 23 ++++
arch/x86/kernel/head_64.S | 5 +-
scripts/Makefile.build | 4 +
tools/objtool/builtin-check.c | 5 +-
tools/objtool/builtin-orc.c | 4 +-
tools/objtool/check.c | 223 +++++++++++++++++++++++++++++++--
tools/objtool/check.h | 3 +-
tools/objtool/special.c | 13 +-
tools/objtool/special.h | 1 +
12 files changed, 318 insertions(+), 55 deletions(-)
next reply other threads:[~2018-01-16 14:34 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-16 14:28 Peter Zijlstra [this message]
2018-01-16 14:28 ` [PATCH v2 01/10] x86: Reindent _static_cpu_has Peter Zijlstra
2018-01-16 15:48 ` Borislav Petkov
2018-01-16 14:28 ` [PATCH v2 02/10] x86: Update _static_cpu_has to use all named variables Peter Zijlstra
2018-01-18 11:21 ` Borislav Petkov
2018-01-18 15:09 ` Peter Zijlstra
2018-01-18 15:24 ` Borislav Petkov
2018-01-16 14:28 ` [PATCH v2 03/10] x86: Add a type field to alt_instr Peter Zijlstra
2018-01-16 22:49 ` Josh Poimboeuf
2018-01-16 22:53 ` Borislav Petkov
2018-01-16 23:06 ` Josh Poimboeuf
2018-01-18 11:32 ` Borislav Petkov
2018-01-16 14:28 ` [PATCH v2 04/10] objtool: Implement base jump_assert support Peter Zijlstra
2018-01-16 14:28 ` [PATCH v2 05/10] x86: Annotate static_cpu_has alternative Peter Zijlstra
2018-01-18 13:15 ` Borislav Petkov
2018-01-16 14:28 ` [PATCH v2 06/10] objtool: Implement jump_assert for _static_cpu_has() Peter Zijlstra
2018-01-16 23:02 ` Josh Poimboeuf
2018-01-17 9:19 ` Peter Zijlstra
2018-01-17 14:27 ` Josh Poimboeuf
2018-01-17 14:30 ` Josh Poimboeuf
2018-01-17 16:30 ` Peter Zijlstra
2018-01-16 14:28 ` [PATCH v2 07/10] x86/jump_label: Implement arch_static_assert() Peter Zijlstra
2018-01-18 13:33 ` Borislav Petkov
2018-01-18 15:31 ` Peter Zijlstra
2018-01-16 14:28 ` [PATCH v2 08/10] objtool: Add retpoline validation Peter Zijlstra
2018-01-16 14:28 ` [PATCH v2 09/10] x86: Annotate dynamic jump in head_64.S Peter Zijlstra
2018-01-16 14:28 ` [PATCH v2 10/10] objtool: More complex static jump implementation Peter Zijlstra
2018-01-16 15:20 ` Peter Zijlstra
2018-01-17 3:05 ` Josh Poimboeuf
2018-01-17 8:18 ` Peter Zijlstra
2018-01-16 19:49 ` [PATCH v2 11/10] objtool: Even more complex static block checks Peter Zijlstra
2018-01-17 3:12 ` Josh Poimboeuf
2018-01-17 8:13 ` Peter Zijlstra
2018-01-17 14:13 ` Josh Poimboeuf
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