From: tip-bot for David Woodhouse <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: pjt@google.com, keescook@google.com, tglx@linutronix.de,
mingo@kernel.org, jikos@kernel.org, hpa@zytor.com,
dave.hansen@intel.com, peterz@infradead.org, ak@linux.intel.com,
gregkh@linux-foundation.org, riel@redhat.com,
linux-kernel@vger.kernel.org, luto@amacapital.net,
torvalds@linux-foundation.org, dwmw@amazon.co.uk,
tim.c.chen@linux.intel.com
Subject: [tip:x86/pti] x86/cpufeatures: Add X86_BUG_SPECTRE_V[12]
Date: Sat, 6 Jan 2018 13:05:08 -0800 [thread overview]
Message-ID: <tip-99c6fa2511d8a683e61468be91b83f85452115fa@git.kernel.org> (raw)
In-Reply-To: <1515239374-23361-2-git-send-email-dwmw@amazon.co.uk>
Commit-ID: 99c6fa2511d8a683e61468be91b83f85452115fa
Gitweb: https://git.kernel.org/tip/99c6fa2511d8a683e61468be91b83f85452115fa
Author: David Woodhouse <dwmw@amazon.co.uk>
AuthorDate: Sat, 6 Jan 2018 11:49:23 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Sat, 6 Jan 2018 21:57:19 +0100
x86/cpufeatures: Add X86_BUG_SPECTRE_V[12]
Add the bug bits for spectre v1/2 and force them unconditionally for all
cpus.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: gnomes@lxorguk.ukuu.org.uk
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kees Cook <keescook@google.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org>
Cc: Paul Turner <pjt@google.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1515239374-23361-2-git-send-email-dwmw@amazon.co.uk
---
arch/x86/include/asm/cpufeatures.h | 2 ++
arch/x86/kernel/cpu/common.c | 3 +++
2 files changed, 5 insertions(+)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index 21ac898..1641c2f 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -342,5 +342,7 @@
#define X86_BUG_MONITOR X86_BUG(12) /* IPI required to wake up remote CPU */
#define X86_BUG_AMD_E400 X86_BUG(13) /* CPU is among the affected by Erratum 400 */
#define X86_BUG_CPU_MELTDOWN X86_BUG(14) /* CPU is affected by meltdown attack and needs kernel page table isolation */
+#define X86_BUG_SPECTRE_V1 X86_BUG(15) /* CPU is affected by Spectre variant 1 attack with conditional branches */
+#define X86_BUG_SPECTRE_V2 X86_BUG(16) /* CPU is affected by Spectre variant 2 attack with indirect branches */
#endif /* _ASM_X86_CPUFEATURES_H */
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 2d3bd22..372ba3f 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -902,6 +902,9 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
if (c->x86_vendor != X86_VENDOR_AMD)
setup_force_cpu_bug(X86_BUG_CPU_MELTDOWN);
+ setup_force_cpu_bug(X86_BUG_SPECTRE_V1);
+ setup_force_cpu_bug(X86_BUG_SPECTRE_V2);
+
fpu__init_system(c);
#ifdef CONFIG_X86_32
next prev parent reply other threads:[~2018-01-06 21:09 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-06 11:49 [PATCH v5 00/12] Retpoline: Avoid speculative indirect calls in kernel David Woodhouse
2018-01-06 11:49 ` [PATCH v5 01/12] x86/spectre: Add X86_BUG_SPECTRE_V[12] David Woodhouse
2018-01-06 21:05 ` tip-bot for David Woodhouse [this message]
2018-01-06 11:49 ` [PATCH v5 02/12] x86/retpoline: Add initial retpoline support David Woodhouse
2018-01-06 17:32 ` David Woodhouse
2018-01-06 18:05 ` [PATCH v5.1 " David Woodhouse
2018-01-06 18:35 ` [PATCH v5 " Eric Biggers
2018-01-06 19:17 ` David Woodhouse
2018-01-06 21:16 ` Andrew Cooper
2018-01-06 21:21 ` Woodhouse, David
2018-01-07 1:44 ` Tom Lendacky
2018-01-06 21:23 ` Thomas Gleixner
2018-01-06 21:34 ` Andrew Cooper
2018-01-06 21:49 ` Woodhouse, David
2018-01-06 11:49 ` [PATCH v5 03/12] x86/retpoline/crypto: Convert crypto assembler indirect jumps David Woodhouse
2018-01-06 11:49 ` [PATCH v5 04/12] x86/retpoline/entry: Convert entry " David Woodhouse
2018-01-06 11:49 ` [PATCH v5 05/12] x86/retpoline/ftrace: Convert ftrace " David Woodhouse
2018-01-06 18:13 ` Linus Torvalds
2018-01-06 19:53 ` Thomas Gleixner
2018-01-07 1:27 ` Linus Torvalds
2018-01-06 11:49 ` [PATCH v5 06/12] x86/retpoline/hyperv: Convert " David Woodhouse
2018-01-06 11:49 ` [PATCH v5 07/12] x86/retpoline/xen: Convert Xen hypercall " David Woodhouse
2018-01-06 11:49 ` [PATCH v5 08/12] x86/retpoline/checksum32: Convert assembler " David Woodhouse
2018-01-06 11:49 ` [PATCH v5 09/12] x86/retpoline/irq32: " David Woodhouse
2018-01-06 11:49 ` [PATCH v5 10/12] x86/retpoline: Add boot time option to disable retpoline David Woodhouse
2018-01-06 11:49 ` [PATCH v5 11/12] x86/retpoline: Exclude objtool with retpoline David Woodhouse
2018-01-06 11:49 ` [PATCH v5 12/12] retpoline/modpost: Quieten MODVERSION retpoline build David Woodhouse
2018-01-07 0:10 ` [RFC PATCH 13/12] Retpoline vs. CONFIG_TRIM_UNUSED_SYMBOLS David Woodhouse
2018-01-07 8:03 ` David Woodhouse
2018-01-07 15:09 ` Lu, Hongjiu
2018-01-07 17:32 ` David Woodhouse
2018-01-07 17:57 ` Lu, Hongjiu
2018-01-07 18:18 ` Thomas Gleixner
2018-01-07 18:32 ` Lu, Hongjiu
2018-01-07 20:57 ` David Woodhouse
2018-01-07 22:16 ` David Woodhouse
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