From: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Andi Kleen <ak@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Martin Liska <mliska@suse.cz>,
Jiri Slaby <jslaby@suse.cz>
Subject: [PATCH 31/46] x86/purgatory, lto: Disable gcc LTO for purgatory
Date: Mon, 14 Nov 2022 12:43:29 +0100 [thread overview]
Message-ID: <20221114114344.18650-32-jirislaby@kernel.org> (raw)
In-Reply-To: <20221114114344.18650-1-jirislaby@kernel.org>
From: Andi Kleen <ak@linux.intel.com>
There are various issues with gcc LTO in the purgatory code, so disable
LTO here for now.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Martin Liska <mliska@suse.cz>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
arch/x86/purgatory/Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index 17f09dc26381..c00dc09d6fe4 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -60,6 +60,8 @@ ifdef CONFIG_CFI_CLANG
PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_CFI)
endif
+PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_LTO)
+
CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_purgatory.o += $(PURGATORY_CFLAGS)
--
2.38.1
next prev parent reply other threads:[~2022-11-14 11:47 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-14 11:42 [PATCH 00/46] gcc-LTO support for the kernel Jiri Slaby (SUSE)
2022-11-14 11:42 ` [PATCH 01/46] x86/boot: robustify calling startup_{32,64}() from the decompressor code Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 02/46] kbuild: pass jobserver to cmd_ld_vmlinux.o Jiri Slaby (SUSE)
2022-11-14 17:57 ` Masahiro Yamada
2022-11-15 6:36 ` Jiri Slaby
2022-11-14 11:43 ` [PATCH 03/46] kbuild: lto: preserve MAKEFLAGS for module linking Jiri Slaby (SUSE)
2022-11-14 18:02 ` Masahiro Yamada
2022-11-14 11:43 ` [PATCH 04/46] compiler.h: introduce __visible_on_lto Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 05/46] compiler.h: introduce __global_on_lto Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 06/46] Compiler Attributes, lto: introduce __noreorder Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 07/46] tracepoint, lto: Mark static call functions as __visible Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 08/46] static_call, lto: Mark static keys " Jiri Slaby (SUSE)
2022-11-14 15:51 ` Peter Zijlstra
2022-11-14 18:52 ` Josh Poimboeuf
2022-11-14 20:34 ` Andi Kleen
2022-11-17 8:24 ` Peter Zijlstra
2022-11-14 18:57 ` Josh Poimboeuf
2022-11-14 11:43 ` [PATCH 09/46] static_call, lto: Mark static_call_return0() " Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 10/46] static_call, lto: Mark func_a() as __visible_on_lto Jiri Slaby (SUSE)
2022-11-14 15:54 ` Peter Zijlstra
2022-11-14 20:29 ` Andi Kleen
2022-11-14 11:43 ` [PATCH 11/46] x86/alternative, lto: Mark int3_*() as global and __visible Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 12/46] x86/paravirt, lto: Mark native_steal_clock() as __visible_on_lto Jiri Slaby (SUSE)
2022-11-14 15:58 ` Peter Zijlstra
2022-11-14 11:43 ` [PATCH 13/46] x86/preempt, lto: Mark preempt_schedule_*thunk() as __visible Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 14/46] x86/sev, lto: Mark cpuid_table_copy as __visible_on_lto Jiri Slaby (SUSE)
2022-11-14 16:02 ` Peter Zijlstra
2022-11-14 11:43 ` [PATCH 15/46] x86/xen, lto: Mark xen_vcpu_stolen() as __visible Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 16/46] x86, lto: Mark gdt_page and native_sched_clock() " Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 17/46] amd, lto: Mark amd pmu and pstate functions as __visible_on_lto Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 18/46] entry, lto: Mark raw_irqentry_exit_cond_resched() as __visible Jiri Slaby (SUSE)
2022-11-16 23:30 ` Thomas Gleixner
2022-11-17 8:40 ` Peter Zijlstra
2022-11-17 22:07 ` Andi Kleen
2022-11-18 1:28 ` Thomas Gleixner
2022-11-19 0:50 ` Andi Kleen
2022-11-19 8:50 ` Thomas Gleixner
2022-11-22 9:32 ` Jiri Slaby
2022-11-14 11:43 ` [PATCH 19/46] export, lto: Mark __kstrtab* in EXPORT_SYMBOL() as global and __visible Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 20/46] softirq, lto: Mark irq_enter/exit_rcu() as __visible Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 21/46] btf, lto: pass scope as strings Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 22/46] btf, lto: Make all BTF IDs global on LTO Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 23/46] init.h, lto: mark initcalls as __noreorder Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 24/46] bpf, lto: mark interpreter jump table " Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 25/46] sched, lto: mark sched classes " Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 26/46] x86/apic, lto: Mark apic_driver*() " Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 27/46] linkage, lto: use C version for SYSCALL_ALIAS() / cond_syscall() Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 28/46] scripts, lto: re-add gcc-ld Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 29/46] scripts, lto: use CONFIG_LTO for many LTO specific actions Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 30/46] Kbuild, lto: Add Link Time Optimization support Jiri Slaby (SUSE)
2022-11-14 18:55 ` Josh Poimboeuf
2022-11-15 13:31 ` Martin Liška
2022-11-14 11:43 ` Jiri Slaby (SUSE) [this message]
2022-11-14 11:43 ` [PATCH 32/46] x86/realmode, lto: Disable gcc LTO for real mode code Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 33/46] x86/vdso, lto: Disable gcc LTO for the vdso Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 34/46] scripts, lto: disable gcc LTO for some mod sources Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 35/46] Kbuild, lto: disable gcc LTO for bounds+asm-offsets Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 36/46] lib/string, lto: disable gcc LTO for string.o Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 37/46] Compiler attributes, lto: disable __flatten with LTO Jiri Slaby (SUSE)
2022-11-14 17:01 ` Miguel Ojeda
2022-11-14 11:43 ` [PATCH 38/46] Kbuild, lto: don't include weak source file symbols in System.map Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 39/46] x86, lto: Disable relative init pointers with gcc LTO Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 40/46] x86/livepatch, lto: Disable live patching " Jiri Slaby (SUSE)
2022-11-14 19:07 ` Josh Poimboeuf
2022-11-14 20:28 ` Andi Kleen
2022-11-14 22:00 ` Josh Poimboeuf
2022-11-15 13:32 ` Martin Liška
2022-11-17 20:00 ` Song Liu
2022-11-14 11:43 ` [PATCH 41/46] x86/lib, lto: Mark 32bit mem{cpy,move,set} as __used Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 42/46] mm/kasan, lto: Mark kasan " Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 43/46] scripts, lto: check C symbols for modversions Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 44/46] scripts/bloat-o-meter, lto: handle gcc LTO Jiri Slaby (SUSE)
2022-11-14 11:43 ` [PATCH 45/46] kasan, lto: remove extra BUILD_BUG() in memory_is_poisoned Jiri Slaby (SUSE)
2022-11-26 17:07 ` Andrey Konovalov
2022-11-14 11:43 ` [PATCH 46/46] x86, lto: Finally enable gcc LTO for x86 Jiri Slaby (SUSE)
2022-11-14 11:56 ` [PATCH 00/46] gcc-LTO support for the kernel Ard Biesheuvel
2022-11-14 12:04 ` Jiri Slaby
2022-11-14 19:40 ` Ard Biesheuvel
2022-11-17 8:28 ` Peter Zijlstra
2022-11-17 8:50 ` Richard Biener
2022-11-17 11:42 ` Peter Zijlstra
2022-11-17 11:49 ` Ard Biesheuvel
2022-11-17 13:55 ` Richard Biener
2022-11-17 14:32 ` Peter Zijlstra
2022-11-17 14:40 ` Richard Biener
2022-11-17 15:15 ` Ard Biesheuvel
2022-11-17 11:48 ` Thomas Gleixner
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