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Diffstat (limited to 'arch/x86/kvm/x86.c')
-rw-r--r--arch/x86/kvm/x86.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bc224bba1e8..21338bdb28f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3703,10 +3703,19 @@ void fx_init(struct kvm_vcpu *vcpu)
{
unsigned after_mxcsr_mask;
+ /*
+ * Touch the fpu the first time in non atomic context as if
+ * this is the first fpu instruction the exception handler
+ * will fire before the instruction returns and it'll have to
+ * allocate ram with GFP_KERNEL.
+ */
+ if (!used_math())
+ fx_save(&vcpu->arch.host_fx_image);
+
/* Initialize guest FPU by resetting ours and saving into guest's */
preempt_disable();
fx_save(&vcpu->arch.host_fx_image);
- fpu_init();
+ fx_finit();
fx_save(&vcpu->arch.guest_fx_image);
fx_restore(&vcpu->arch.host_fx_image);
preempt_enable();