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Date: Tue, 25 Oct 2016 03:33:36 -0700
From: tip-bot for Borislav Petkov <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: tglx@...utronix.de, brgerst@...il.com, bp@...e.de, hpa@...or.com,
dvlasenk@...hat.com, luto@...nel.org, jpoimboe@...hat.com,
torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
peterz@...radead.org, bp@...en8.de, mingo@...nel.org
Subject: [tip:x86/cpu] x86/cpu: Merge bugs.c and bugs_64.c
Commit-ID: 62a67e123e058a67db58bc6a14354dd037bafd0a
Gitweb: http://git.kernel.org/tip/62a67e123e058a67db58bc6a14354dd037bafd0a
Author: Borislav Petkov <bp@...e.de>
AuthorDate: Mon, 24 Oct 2016 19:38:43 +0200
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 25 Oct 2016 11:48:50 +0200
x86/cpu: Merge bugs.c and bugs_64.c
Should be easier when following boot paths. It probably is a left over
from the x86 unification eons ago.
No functionality change.
Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/20161024173844.23038-3-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/x86/kernel/cpu/Makefile | 4 +---
arch/x86/kernel/cpu/bugs.c | 26 ++++++++++++++++++++++----
arch/x86/kernel/cpu/bugs_64.c | 33 ---------------------------------
3 files changed, 23 insertions(+), 40 deletions(-)
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 4a8697f..33b6367 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -20,13 +20,11 @@ obj-y := intel_cacheinfo.o scattered.o topology.o
obj-y += common.o
obj-y += rdrand.o
obj-y += match.o
+obj-y += bugs.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_X86_FEATURE_NAMES) += capflags.o powerflags.o
-obj-$(CONFIG_X86_32) += bugs.o
-obj-$(CONFIG_X86_64) += bugs_64.o
-
obj-$(CONFIG_CPU_SUP_INTEL) += intel.o
obj-$(CONFIG_CPU_SUP_AMD) += amd.o
obj-$(CONFIG_CPU_SUP_CYRIX_32) += cyrix.o
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index bd17db1..a44ef52 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -16,15 +16,19 @@
#include <asm/msr.h>
#include <asm/paravirt.h>
#include <asm/alternative.h>
+#include <asm/pgtable.h>
+#include <asm/cacheflush.h>
void __init check_bugs(void)
{
identify_boot_cpu();
-#ifndef CONFIG_SMP
- pr_info("CPU: ");
- print_cpu_info(&boot_cpu_data);
-#endif
+ if (!IS_ENABLED(CONFIG_SMP)) {
+ pr_info("CPU: ");
+ print_cpu_info(&boot_cpu_data);
+ }
+
+#ifdef CONFIG_X86_32
/*
* Check whether we are able to run this kernel safely on SMP.
*
@@ -40,4 +44,18 @@ void __init check_bugs(void)
alternative_instructions();
fpu__init_check_bugs();
+#else /* CONFIG_X86_64 */
+ alternative_instructions();
+
+ /*
+ * Make sure the first 2MB area is not mapped by huge pages
+ * There are typically fixed size MTRRs in there and overlapping
+ * MTRRs into large pages causes slow downs.
+ *
+ * Right now we don't do that with gbpages because there seems
+ * very little benefit for that case.
+ */
+ if (!direct_gbpages)
+ set_memory_4k((unsigned long)__va(0), 1);
+#endif
}
diff --git a/arch/x86/kernel/cpu/bugs_64.c b/arch/x86/kernel/cpu/bugs_64.c
deleted file mode 100644
index a972ac4..0000000
--- a/arch/x86/kernel/cpu/bugs_64.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 1994 Linus Torvalds
- * Copyright (C) 2000 SuSE
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <asm/alternative.h>
-#include <asm/bugs.h>
-#include <asm/processor.h>
-#include <asm/mtrr.h>
-#include <asm/cacheflush.h>
-
-void __init check_bugs(void)
-{
- identify_boot_cpu();
-#if !defined(CONFIG_SMP)
- pr_info("CPU: ");
- print_cpu_info(&boot_cpu_data);
-#endif
- alternative_instructions();
-
- /*
- * Make sure the first 2MB area is not mapped by huge pages
- * There are typically fixed size MTRRs in there and overlapping
- * MTRRs into large pages causes slow downs.
- *
- * Right now we don't do that with gbpages because there seems
- * very little benefit for that case.
- */
- if (!direct_gbpages)
- set_memory_4k((unsigned long)__va(0), 1);
-}
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