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From: Peter Zijlstra <peterz@infradead.org>
To: Nathan Chancellor <nathan@kernel.org>
Cc: "Nick Desaulniers" <ndesaulniers@google.com>,
	"Fāng-ruì Sòng" <maskray@google.com>,
	"Josh Poimboeuf" <jpoimboe@redhat.com>,
	lma@semihalf.com, "Guenter Roeck" <groeck@google.com>,
	"Juergen Gross" <jgross@suse.com>,
	lb@semihalf.com, LKML <linux-kernel@vger.kernel.org>,
	mbenes@suse.com, "Radosław Biernacki" <rad@semihalf.com>,
	upstream@semihalf.com,
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
	<x86@kernel.org>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	"Sami Tolvanen" <samitolvanen@google.com>
Subject: Re: [PATCH v3 16/16] objtool,x86: Rewrite retpoline thunk calls
Date: Tue, 8 Jun 2021 19:22:55 +0200	[thread overview]
Message-ID: <YL+nb235rIfEdye0@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <e351ac97-4038-61b5-b373-63698a787fc1@kernel.org>

On Tue, Jun 08, 2021 at 09:58:03AM -0700, Nathan Chancellor wrote:
> On 6/7/2021 1:54 PM, 'Nick Desaulniers' via Clang Built Linux wrote:
> > On Mon, Jun 7, 2021 at 2:46 AM Peter Zijlstra <peterz@infradead.org> wrote:
> > > 
> > 
> > Thanks, the below diff resolves the linker error reported in
> > https://github.com/ClangBuiltLinux/linux/issues/1388
> > 
> > Both readelf implementations seem happy with the results, too.
> > 
> > Tested-by: Nick Desaulniers <ndesaulniers@google.com>
> > 
> > Nathan,
> > Can you please test the below diff and see if that resolves your boot
> > issue reported in:
> > https://github.com/ClangBuiltLinux/linux/issues/1384
> 
> Unfortunately, it does not appear to resolve that issue.
> 
> $ git log -2 --decorate=no --oneline
> eea6a9d6d277 Peter's fix
> 614124bea77e Linux 5.13-rc5
> 
> $ strings /mnt/c/Users/natec/Linux/kernel-investigation | grep microsoft
> 5.13.0-rc5-microsoft-standard-WSL2-00001-geea6a9d6d277
> (nathan@archlinux-ax161) #3 SMP Tue Jun 8 09:46:19 MST 2021
> 
> My VM still never makes it to userspace.

Since it's a VM, can you use the gdb-stub to ask it where it's stuck?

  reply	other threads:[~2021-06-08 17:23 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-26 15:11 [PATCH v3 00/16] x86,objtool: Optimize !RETPOLINE Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 01/16] x86: Add insn_decode_kernel() Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 02/16] x86/alternatives: Optimize optimize_nops() Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:11   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 03/16] x86/retpoline: Simplify retpolines Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-04-06  8:56     ` David Laight
2021-03-26 15:12 ` [PATCH v3 04/16] objtool: Correctly handle retpoline thunk calls Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 05/16] objtool: Per arch retpoline naming Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] objtool: Handle per " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 06/16] objtool: Fix static_call list generation Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 07/16] objtool: Rework rebuild_reloc logic Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` [tip: x86/core] objtool: Rework the elf_rebuild_reloc_section() logic tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 08/16] objtool: Add elf_create_reloc() helper Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 09/16] objtool: Implicitly create reloc sections Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` [tip: x86/core] objtool: Create reloc sections implicitly tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 10/16] objtool: Extract elf_strtab_concat() Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 11/16] objtool: Extract elf_symbol_add() Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 12/16] objtool: Add elf_create_undef_symbol() Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 13/16] objtool: Keep track of retpoline call sites Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 14/16] objtool: Cache instruction relocs Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 15/16] objtool: Skip magical retpoline .altinstr_replacement Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-26 15:12 ` [PATCH v3 16/16] objtool,x86: Rewrite retpoline thunk calls Peter Zijlstra
2021-03-29 16:38   ` Josh Poimboeuf
2021-06-02 15:51     ` Lukasz Majczak
2021-06-02 16:56       ` Peter Zijlstra
2021-06-02 17:10         ` Peter Zijlstra
2021-06-02 20:43       ` Josh Poimboeuf
2021-06-04 20:50       ` Nick Desaulniers
2021-06-04 23:27         ` Nick Desaulniers
2021-06-04 23:50           ` Fangrui Song
2021-06-05 10:38             ` Peter Zijlstra
2021-06-06  1:58               ` Fāng-ruì Sòng
2021-06-07  7:56                 ` Peter Zijlstra
2021-06-07  9:22                   ` Peter Zijlstra
2021-06-07  9:45                     ` Peter Zijlstra
2021-06-07 17:23                       ` Fāng-ruì Sòng
2021-06-07 18:25                         ` Peter Zijlstra
2021-06-07 20:54                       ` Nick Desaulniers
2021-06-08  9:56                         ` Peter Zijlstra
2021-06-08 16:58                         ` Nathan Chancellor
2021-06-08 17:22                           ` Peter Zijlstra [this message]
2021-06-08 17:29                             ` Nathan Chancellor
2021-06-08 18:17                               ` Peter Zijlstra
2021-06-08 18:49                                 ` Nathan Chancellor
2021-06-09  7:11                                   ` Lukasz Majczak
2021-06-09  7:20                                     ` Peter Zijlstra
2021-06-09 12:23                                       ` Lukasz Majczak
2021-06-09 15:08                                         ` Peter Zijlstra
2021-06-09 15:11                                           ` Peter Zijlstra
2021-06-09 15:56                                           ` Nathan Chancellor
2021-06-08 18:18                               ` Nick Desaulniers
2021-06-07 18:19                 ` Peter Zijlstra
2021-06-07 18:27                   ` Fāng-ruì Sòng
2021-06-07 18:47                     ` Peter Zijlstra
2021-04-01 15:08   ` [tip: x86/core] objtool/x86: " tip-bot2 for Peter Zijlstra
2021-04-03 11:10   ` tip-bot2 for Peter Zijlstra
2021-03-30 15:02 ` [PATCH v3 00/16] x86,objtool: Optimize !RETPOLINE Miroslav Benes

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