From: Ard Biesheuvel <ardb@kernel.org> To: Nick Desaulniers <ndesaulniers@google.com> Cc: Sami Tolvanen <samitolvanen@google.com>, Masahiro Yamada <masahiroy@kernel.org>, Steven Rostedt <rostedt@goodmis.org>, Will Deacon <will@kernel.org>, Josh Poimboeuf <jpoimboe@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Paul E. McKenney" <paulmck@kernel.org>, Kees Cook <keescook@chromium.org>, clang-built-linux <clang-built-linux@googlegroups.com>, Kernel Hardening <kernel-hardening@lists.openwall.com>, linux-arch <linux-arch@vger.kernel.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, PCI <linux-pci@vger.kernel.org>, Alistair Delva <adelva@google.com> Subject: Re: [PATCH v7 00/17] Add support for Clang LTO Date: Sat, 21 Nov 2020 00:30:32 +0100 [thread overview] Message-ID: <CAMj1kXEoPEd6GzjL1XuxTPwitbR03BiBEXpAGtUytMj-h=vCkg@mail.gmail.com> (raw) In-Reply-To: <CAKwvOdmpBNx9iSguGXivjJ03FaN5rgv2oaXZUQxYPdRccQmdyQ@mail.gmail.com> On Fri, 20 Nov 2020 at 21:19, Nick Desaulniers <ndesaulniers@google.com> wrote: > > On Fri, Nov 20, 2020 at 2:30 AM Ard Biesheuvel <ardb@kernel.org> wrote: > > > > On Thu, 19 Nov 2020 at 00:42, Nick Desaulniers <ndesaulniers@google.com> wrote: > > > > > > Thanks for continuing to drive this series Sami. For the series, > > > > > > Tested-by: Nick Desaulniers <ndesaulniers@google.com> > > > > > > I did virtualized boot tests with the series applied to aarch64 > > > defconfig without CONFIG_LTO, with CONFIG_LTO_CLANG, and a third time > > > with CONFIG_THINLTO. If you make changes to the series in follow ups, > > > please drop my tested by tag from the modified patches and I'll help > > > re-test. Some minor feedback on the Kconfig change, but I'll post it > > > off of that patch. > > > > > > > When you say 'virtualized" do you mean QEMU on x86? Or actual > > virtualization on an AArch64 KVM host? > > aarch64 guest on x86_64 host. If you have additional configurations > that are important to you, additional testing help would be > appreciated. > Could you run this on an actual phone? Or does Android already ship with this stuff? > > > > The distinction is important here, given the potential impact of LTO > > on things that QEMU simply does not model when it runs in TCG mode on > > a foreign host architecture. > > -- > Thanks, > ~Nick Desaulniers
WARNING: multiple messages have this Message-ID (diff)
From: Ard Biesheuvel <ardb@kernel.org> To: Nick Desaulniers <ndesaulniers@google.com> Cc: linux-arch <linux-arch@vger.kernel.org>, Alistair Delva <adelva@google.com>, Kees Cook <keescook@chromium.org>, "Paul E. McKenney" <paulmck@kernel.org>, Kernel Hardening <kernel-hardening@lists.openwall.com>, Peter Zijlstra <peterz@infradead.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Masahiro Yamada <masahiroy@kernel.org>, Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>, PCI <linux-pci@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, Steven Rostedt <rostedt@goodmis.org>, clang-built-linux <clang-built-linux@googlegroups.com>, Sami Tolvanen <samitolvanen@google.com>, Josh Poimboeuf <jpoimboe@redhat.com>, Will Deacon <will@kernel.org>, Linux ARM <linux-arm-kernel@lists.infradead.org> Subject: Re: [PATCH v7 00/17] Add support for Clang LTO Date: Sat, 21 Nov 2020 00:30:32 +0100 [thread overview] Message-ID: <CAMj1kXEoPEd6GzjL1XuxTPwitbR03BiBEXpAGtUytMj-h=vCkg@mail.gmail.com> (raw) In-Reply-To: <CAKwvOdmpBNx9iSguGXivjJ03FaN5rgv2oaXZUQxYPdRccQmdyQ@mail.gmail.com> On Fri, 20 Nov 2020 at 21:19, Nick Desaulniers <ndesaulniers@google.com> wrote: > > On Fri, Nov 20, 2020 at 2:30 AM Ard Biesheuvel <ardb@kernel.org> wrote: > > > > On Thu, 19 Nov 2020 at 00:42, Nick Desaulniers <ndesaulniers@google.com> wrote: > > > > > > Thanks for continuing to drive this series Sami. For the series, > > > > > > Tested-by: Nick Desaulniers <ndesaulniers@google.com> > > > > > > I did virtualized boot tests with the series applied to aarch64 > > > defconfig without CONFIG_LTO, with CONFIG_LTO_CLANG, and a third time > > > with CONFIG_THINLTO. If you make changes to the series in follow ups, > > > please drop my tested by tag from the modified patches and I'll help > > > re-test. Some minor feedback on the Kconfig change, but I'll post it > > > off of that patch. > > > > > > > When you say 'virtualized" do you mean QEMU on x86? Or actual > > virtualization on an AArch64 KVM host? > > aarch64 guest on x86_64 host. If you have additional configurations > that are important to you, additional testing help would be > appreciated. > Could you run this on an actual phone? Or does Android already ship with this stuff? > > > > The distinction is important here, given the potential impact of LTO > > on things that QEMU simply does not model when it runs in TCG mode on > > a foreign host architecture. > > -- > Thanks, > ~Nick Desaulniers _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-11-20 23:30 UTC|newest] Thread overview: 134+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-18 22:07 [PATCH v7 00/17] Add support for Clang LTO Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 01/17] tracing: move function tracer options to Kconfig Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 02/17] kbuild: add support for Clang LTO Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 23:48 ` Nick Desaulniers 2020-11-18 23:48 ` Nick Desaulniers 2020-11-18 23:48 ` Nick Desaulniers 2020-11-20 16:23 ` Sami Tolvanen 2020-11-20 16:23 ` Sami Tolvanen 2020-11-20 16:23 ` Sami Tolvanen 2020-11-20 19:47 ` Kees Cook 2020-11-20 19:47 ` Kees Cook 2020-11-20 20:29 ` Nathan Chancellor 2020-11-20 20:29 ` Nathan Chancellor 2020-11-20 20:43 ` Kees Cook 2020-11-20 20:43 ` Kees Cook 2020-11-20 20:58 ` Sami Tolvanen 2020-11-20 20:58 ` Sami Tolvanen 2020-11-20 20:58 ` Sami Tolvanen 2020-11-20 23:59 ` Kees Cook 2020-11-20 23:59 ` Kees Cook 2020-11-21 1:46 ` Sami Tolvanen 2020-11-21 1:46 ` Sami Tolvanen 2020-11-21 1:46 ` Sami Tolvanen 2020-11-21 20:11 ` Kees Cook 2020-11-21 20:11 ` Kees Cook 2020-11-18 22:07 ` [PATCH v7 03/17] kbuild: lto: fix module versioning Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 04/17] kbuild: lto: limit inlining Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 05/17] kbuild: lto: merge module sections Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 06/17] kbuild: lto: remove duplicate dependencies from .mod files Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 07/17] init: lto: ensure initcall ordering Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 08/17] init: lto: fix PREL32 relocations Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 09/17] PCI: Fix PREL32 relocations for LTO Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 10/17] modpost: lto: strip .lto from module names Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 11/17] scripts/mod: disable LTO for empty.c Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 12/17] efi/libstub: disable LTO Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 13/17] drivers/misc/lkdtm: disable LTO for rodata.o Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 14/17] arm64: vdso: disable LTO Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-30 11:52 ` Will Deacon 2020-11-30 11:52 ` Will Deacon 2020-11-30 23:44 ` Sami Tolvanen 2020-11-30 23:44 ` Sami Tolvanen 2020-11-30 23:44 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 15/17] KVM: arm64: disable LTO for the nVHE directory Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-23 10:21 ` David Brazdil 2020-11-23 10:21 ` David Brazdil 2020-11-23 18:34 ` Sami Tolvanen 2020-11-23 18:34 ` Sami Tolvanen 2020-11-23 18:34 ` Sami Tolvanen 2020-11-18 22:07 ` [PATCH v7 16/17] arm64: disable recordmcount with DYNAMIC_FTRACE_WITH_REGS Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-30 11:59 ` Will Deacon 2020-11-30 11:59 ` Will Deacon 2020-11-18 22:07 ` [PATCH v7 17/17] arm64: allow LTO_CLANG and THINLTO to be selected Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-18 22:07 ` Sami Tolvanen 2020-11-30 12:00 ` Will Deacon 2020-11-30 12:00 ` Will Deacon 2020-11-18 23:42 ` [PATCH v7 00/17] Add support for Clang LTO Nick Desaulniers 2020-11-18 23:42 ` Nick Desaulniers 2020-11-18 23:42 ` Nick Desaulniers 2020-11-20 10:29 ` Ard Biesheuvel 2020-11-20 10:29 ` Ard Biesheuvel 2020-11-20 10:29 ` Ard Biesheuvel 2020-11-20 20:19 ` Nick Desaulniers 2020-11-20 20:19 ` Nick Desaulniers 2020-11-20 20:19 ` Nick Desaulniers 2020-11-20 23:30 ` Ard Biesheuvel [this message] 2020-11-20 23:30 ` Ard Biesheuvel 2020-11-20 23:30 ` Ard Biesheuvel 2020-11-20 23:53 ` Nick Desaulniers 2020-11-20 23:53 ` Nick Desaulniers 2020-11-20 23:53 ` Nick Desaulniers 2020-11-21 7:35 ` Ard Biesheuvel 2020-11-21 7:35 ` Ard Biesheuvel 2020-11-21 7:35 ` Ard Biesheuvel 2020-11-21 11:40 ` Marc Zyngier 2020-11-21 11:40 ` Marc Zyngier 2020-11-21 3:14 ` Nathan Chancellor 2020-11-21 3:14 ` Nathan Chancellor 2020-11-20 4:04 ` Josh Poimboeuf 2020-11-20 4:04 ` Josh Poimboeuf 2020-11-20 20:25 ` Sami Tolvanen 2020-11-20 20:25 ` Sami Tolvanen 2020-11-20 20:25 ` Sami Tolvanen 2020-11-30 12:01 ` Will Deacon 2020-11-30 12:01 ` Will Deacon 2020-12-01 17:31 ` Kees Cook 2020-12-01 17:31 ` Kees Cook 2020-12-01 19:51 ` Nick Desaulniers 2020-12-01 19:51 ` Nick Desaulniers 2020-12-01 19:51 ` Nick Desaulniers 2020-12-01 21:38 ` Sami Tolvanen 2020-12-01 21:38 ` Sami Tolvanen 2020-12-01 21:38 ` Sami Tolvanen 2020-12-02 2:42 ` Masahiro Yamada 2020-12-02 2:42 ` Masahiro Yamada 2020-12-02 5:46 ` Sami Tolvanen 2020-12-02 5:46 ` Sami Tolvanen 2020-12-02 5:46 ` Sami Tolvanen 2020-12-02 18:54 ` Kees Cook 2020-12-02 18:54 ` Kees Cook
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