diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0053-x86-cpu-Merge-bugs.c-and-bugs_64.c.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0053-x86-cpu-Merge-bugs.c-and-bugs_64.c.patch | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0053-x86-cpu-Merge-bugs.c-and-bugs_64.c.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0053-x86-cpu-Merge-bugs.c-and-bugs_64.c.patch new file mode 100644 index 00000000..f540afd0 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0053-x86-cpu-Merge-bugs.c-and-bugs_64.c.patch @@ -0,0 +1,141 @@ +From a1aca7fc1e1c73add0d8caa5773a4d393e5b60b1 Mon Sep 17 00:00:00 2001 +From: Borislav Petkov <bp@suse.de> +Date: Mon, 24 Oct 2016 19:38:43 +0200 +Subject: [PATCH 053/103] x86/cpu: Merge bugs.c and bugs_64.c + +commit 62a67e123e058a67db58bc6a14354dd037bafd0a upstream. + +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@suse.de> +Cc: Andy Lutomirski <luto@kernel.org> +Cc: Borislav Petkov <bp@alien8.de> +Cc: Brian Gerst <brgerst@gmail.com> +Cc: Denys Vlasenko <dvlasenk@redhat.com> +Cc: H. Peter Anvin <hpa@zytor.com> +Cc: Josh Poimboeuf <jpoimboe@redhat.com> +Cc: Linus Torvalds <torvalds@linux-foundation.org> +Cc: Peter Zijlstra <peterz@infradead.org> +Cc: Thomas Gleixner <tglx@linutronix.de> +Link: http://lkml.kernel.org/r/20161024173844.23038-3-bp@alien8.de +Signed-off-by: Ingo Molnar <mingo@kernel.org> +Signed-off-by: Razvan Ghitulete <rga@amazon.de> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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(-) + delete mode 100644 arch/x86/kernel/cpu/bugs_64.c + +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); +-} +-- +2.7.4 + |