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| author | Avi Kivity <avi@qumranet.com> | 2007-02-12 00:54:46 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-12 09:48:41 -0800 |
| commit | 8d0be2b3bf4a55606967d7d84e56c52521e94333 (patch) | |
| tree | 25708d831300f807a29ed90fae7a6e692ff392be | |
| parent | 133de9021d2988f3fbdad84c2d26484c7a757526 (diff) | |
| download | linux-stable-8d0be2b3bf4a55606967d7d84e56c52521e94333.tar.gz linux-stable-8d0be2b3bf4a55606967d7d84e56c52521e94333.tar.bz2 linux-stable-8d0be2b3bf4a55606967d7d84e56c52521e94333.zip | |
[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.c | 15 |
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; |