From 8d0be2b3bf4a55606967d7d84e56c52521e94333 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Mon, 12 Feb 2007 00:54:46 -0800 Subject: [PATCH] [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 Signed-off-by: Avi Kivity Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/kvm/vmx.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index 407862825c..28da0cae64 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; -- 2.39.5