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authorAvi Kivity <avi@qumranet.com>2006-12-22 01:05:20 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-22 08:55:46 -0800
commit36241b8c7cbcc83e7fd534d25e1df8339db8244e (patch)
tree7e62afdbe018c826599b83871d33b3c1cdd5a5d9
parent0e859cacb0b01bdbe34b5200dd2457d4818248fa (diff)
[PATCH] KVM: AMD SVM: Save and restore the floating point unit state
Fixes sf bug 1614113 (segfaults in nbench). Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/kvm/svm.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 3bf25795b3e..59c930f276e 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -575,6 +575,8 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu)
memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
init_vmcb(vcpu->svm->vmcb);
+ fx_init(vcpu);
+
return 0;
out2:
@@ -1387,6 +1389,10 @@ again:
save_db_regs(vcpu->svm->host_db_regs);
load_db_regs(vcpu->svm->db_regs);
}
+
+ fx_save(vcpu->host_fx_image);
+ fx_restore(vcpu->guest_fx_image);
+
asm volatile (
#ifdef CONFIG_X86_64
"push %%rbx; push %%rcx; push %%rdx;"
@@ -1496,6 +1502,9 @@ again:
#endif
: "cc", "memory" );
+ fx_save(vcpu->guest_fx_image);
+ fx_restore(vcpu->host_fx_image);
+
if ((vcpu->svm->vmcb->save.dr7 & 0xff))
load_db_regs(vcpu->svm->host_db_regs);