diff options
Diffstat (limited to 'arch/x86/kernel/bugs_64.c')
| -rw-r--r-- | arch/x86/kernel/bugs_64.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/kernel/bugs_64.c b/arch/x86/kernel/bugs_64.c index 8f520f93ffd..9a3ed0649d4 100644 --- a/arch/x86/kernel/bugs_64.c +++ b/arch/x86/kernel/bugs_64.c @@ -9,13 +9,25 @@ #include <asm/bugs.h> #include <asm/processor.h> #include <asm/mtrr.h> +#include <asm/cacheflush.h> void __init check_bugs(void) { - identify_cpu(&boot_cpu_data); + identify_boot_cpu(); #if !defined(CONFIG_SMP) printk("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); } |