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| author | Alex,Shi <alex.shi@intel.com> | 2011-10-20 07:34:01 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-12-27 09:22:13 (GMT) |
| commit | 086c9855019935854311b477b33498a6ea357ef6 (patch) | |
| tree | dd08778f0d85bb2ec8198a8d2704b09555c64e0d /arch | |
| parent | e37fa7853c276403da2fea8792c579e8bfd75042 (diff) | |
| download | linux-fsl-qoriq-086c9855019935854311b477b33498a6ea357ef6.tar.xz | |
KVM: use this_cpu_xxx replace percpu_xxx funcs
percpu_xxx funcs are duplicated with this_cpu_xxx funcs, so replace them
for further code clean up.
And in preempt safe scenario, __this_cpu_xxx funcs has a bit better
performance since __this_cpu_xxx has no redundant preempt_disable()
Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d99976e..d55a94f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4664,15 +4664,15 @@ static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); static int kvm_is_in_guest(void) { - return percpu_read(current_vcpu) != NULL; + return __this_cpu_read(current_vcpu) != NULL; } static int kvm_is_user_mode(void) { int user_mode = 3; - if (percpu_read(current_vcpu)) - user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); + if (__this_cpu_read(current_vcpu)) + user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); return user_mode != 0; } @@ -4681,8 +4681,8 @@ static unsigned long kvm_get_guest_ip(void) { unsigned long ip = 0; - if (percpu_read(current_vcpu)) - ip = kvm_rip_read(percpu_read(current_vcpu)); + if (__this_cpu_read(current_vcpu)) + ip = kvm_rip_read(__this_cpu_read(current_vcpu)); return ip; } @@ -4695,13 +4695,13 @@ static struct perf_guest_info_callbacks kvm_guest_cbs = { void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) { - percpu_write(current_vcpu, vcpu); + __this_cpu_write(current_vcpu, vcpu); } EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) { - percpu_write(current_vcpu, NULL); + __this_cpu_write(current_vcpu, NULL); } EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); |