diff options
Diffstat (limited to 'arch/i386/kernel')
| -rw-r--r-- | arch/i386/kernel/cpu/mtrr/main.c | 11 | ||||
| -rw-r--r-- | arch/i386/kernel/smpboot.c | 7 |
2 files changed, 18 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/mtrr/main.c b/arch/i386/kernel/cpu/mtrr/main.c index 0acfb6a5a22..02a2f39e5e0 100644 --- a/arch/i386/kernel/cpu/mtrr/main.c +++ b/arch/i386/kernel/cpu/mtrr/main.c @@ -729,6 +729,17 @@ void mtrr_ap_init(void) local_irq_restore(flags); } +/** + * Save current fixed-range MTRR state of the BSP + */ +void mtrr_save_state(void) +{ + if (smp_processor_id() == 0) + mtrr_save_fixed_ranges(NULL); + else + smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1); +} + static int __init mtrr_init_finialize(void) { if (!mtrr_if) diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c index 7c1dbef399c..f14d93351a8 100644 --- a/arch/i386/kernel/smpboot.c +++ b/arch/i386/kernel/smpboot.c @@ -58,6 +58,7 @@ #include <mach_wakecpu.h> #include <smpboot_hooks.h> #include <asm/vmi.h> +#include <asm/mtrr.h> /* Set if we find a B stepping CPU */ static int __devinitdata smp_b_stepping; @@ -815,6 +816,12 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu) unsigned short nmi_high = 0, nmi_low = 0; /* + * Save current MTRR state in case it was changed since early boot + * (e.g. by the ACPI SMI) to initialize new CPUs with MTRRs in sync: + */ + mtrr_save_state(); + + /* * We can't use kernel_thread since we must avoid to * reschedule the child. */ |