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authorAvi Kivity <avi@qumranet.com>2007-02-12 00:54:46 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:41 -0800
commit8d0be2b3bf4a55606967d7d84e56c52521e94333 (patch)
tree25708d831300f807a29ed90fae7a6e692ff392be
parent133de9021d2988f3fbdad84c2d26484c7a757526 (diff)
[PATCH] KVM: VMX: add vcpu_clear()
Like the inline code it replaces, this function decaches the vmcs from the cpu it last executed on. in addition: - vcpu_clear() works if the last cpu is also the cpu we're running on - it is faster on larger smps by virtue of using smp_call_function_single() Includes fix from Ingo Molnar. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Avi Kivity <avi@qumranet.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/kvm/vmx.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 407862825c1f..28da0cae64a7 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -125,6 +125,15 @@ static void __vcpu_clear(void *arg)
per_cpu(current_vmcs, cpu) = NULL;
}
+static void vcpu_clear(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->cpu != raw_smp_processor_id() && vcpu->cpu != -1)
+ smp_call_function_single(vcpu->cpu, __vcpu_clear, vcpu, 0, 1);
+ else
+ __vcpu_clear(vcpu);
+ vcpu->launched = 0;
+}
+
static unsigned long vmcs_readl(unsigned long field)
{
unsigned long value;
@@ -202,10 +211,8 @@ static struct kvm_vcpu *vmx_vcpu_load(struct kvm_vcpu *vcpu)
cpu = get_cpu();
- if (vcpu->cpu != cpu) {
- smp_call_function(__vcpu_clear, vcpu, 0, 1);
- vcpu->launched = 0;
- }
+ if (vcpu->cpu != cpu)
+ vcpu_clear(vcpu);
if (per_cpu(current_vmcs, cpu) != vcpu->vmcs) {
u8 error;

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