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KVM: Use alignment properties of vcpu to simplify FPU ops

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Now we use a kmem cache for allocating vcpus, we can get the 16-byte
alignment required by fxsave & fxrstor instructions, and avoid
manually aligning the buffer.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Rusty Russell
2007-07-30 21:13:43 +10:00
committed by Avi Kivity
parent c16f862d02
commit b114b0804d
3 changed files with 25 additions and 41 deletions
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8
drivers/kvm/svm.c
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@@ -1557,8 +1557,8 @@ again:
}
if (vcpu->fpu_active) {
fx_save(vcpu->host_fx_image);
fx_restore(vcpu->guest_fx_image);
fx_save(&vcpu->host_fx_image);
fx_restore(&vcpu->guest_fx_image);
}
asm volatile (
@@ -1670,8 +1670,8 @@ again:
vcpu->guest_mode = 0;
if (vcpu->fpu_active) {
fx_save(vcpu->guest_fx_image);
fx_restore(vcpu->host_fx_image);
fx_save(&vcpu->guest_fx_image);
fx_restore(&vcpu->host_fx_image);
}
if ((svm->vmcb->save.dr7 & 0xff))