From: Chen Yu <yu.c.c...@intel.com>
We record the cpu which has issued the MTRR setting command, then
in the mtrr_rendezvous_handler() we can distinguish it from the
other cpus. This is used for MTRR synchronization optimization.
Cc: Len Brown <len.br...@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Cc: Rui Zhang <rui.zh...@intel.com>
Signed-off-by: Chen Yu <yu.c.c...@intel.com>
---
arch/x86/kernel/cpu/mtrr/main.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 40d5a8a75212..a4e7e23f3c2e 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -148,6 +148,7 @@ struct set_mtrr_data {
unsigned long smp_size;
unsigned int smp_reg;
mtrr_type smp_type;
+ int smp_cpu;
};
/**
@@ -231,7 +232,8 @@ set_mtrr(unsigned int reg, unsigned long base, unsigned
long size, mtrr_type typ
struct set_mtrr_data data = { .smp_reg = reg,
.smp_base = base,
.smp_size = size,
- .smp_type = type
+ .smp_type = type,
+ .smp_cpu = smp_processor_id()
};
stop_machine(mtrr_rendezvous_handler, &data, cpu_online_mask);
@@ -243,7 +245,8 @@ static void set_mtrr_cpuslocked(unsigned int reg, unsigned
long base,
struct set_mtrr_data data = { .smp_reg = reg,
.smp_base = base,
.smp_size = size,
- .smp_type = type
+ .smp_type = type,
+ .smp_cpu = smp_processor_id()
};
stop_machine_cpuslocked(mtrr_rendezvous_handler, &data,
cpu_online_mask);
@@ -255,7 +258,8 @@ static void set_mtrr_from_inactive_cpu(unsigned int reg,
unsigned long base,
struct set_mtrr_data data = { .smp_reg = reg,
.smp_base = base,
.smp_size = size,
- .smp_type = type
+ .smp_type = type,
+ .smp_cpu = smp_processor_id()
};
stop_machine_from_inactive_cpu(mtrr_rendezvous_handler, &data,
--
2.13.5
