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| author | Anthony Liguori | 2007-04-23 16:17:21 +0200 |
|---|---|---|
| committer | Avi Kivity | 2007-05-03 09:52:31 +0200 |
| commit | 7807fa6ca5af2e5660a0eb3cd90276ca0c5bdfc8 (patch) | |
| tree | 8f97af3538acc40a6a72af29f31351d8f0f69296 /drivers/kvm/kvm.h | |
| parent | KVM: Allow passing 64-bit values to the emulated read/write API (diff) | |
| download | kernel-qcow2-linux-7807fa6ca5af2e5660a0eb3cd90276ca0c5bdfc8.tar.gz kernel-qcow2-linux-7807fa6ca5af2e5660a0eb3cd90276ca0c5bdfc8.tar.xz kernel-qcow2-linux-7807fa6ca5af2e5660a0eb3cd90276ca0c5bdfc8.zip | |
KVM: Lazy FPU support for SVM
Avoid saving and restoring the guest fpu state on every exit. This
shaves ~100 cycles off the guest/host switch.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm.h')
| -rw-r--r-- | drivers/kvm/kvm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index d1a90c5d76ce..61ff085df7e6 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -63,6 +63,7 @@ #define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN) #define DE_VECTOR 0 +#define NM_VECTOR 7 #define DF_VECTOR 8 #define TS_VECTOR 10 #define NP_VECTOR 11 @@ -301,6 +302,7 @@ struct kvm_vcpu { char fx_buf[FX_BUF_SIZE]; char *host_fx_image; char *guest_fx_image; + int fpu_active; int mmio_needed; int mmio_read_completed; |