From 36241b8c7cbcc83e7fd534d25e1df8339db8244e Mon Sep 17 00:00:00 2001 From: Avi Kivity <avi@qumranet.com> Date: Fri, 22 Dec 2006 01:05:20 -0800 Subject: [PATCH] [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> --- drivers/kvm/svm.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 3bf25795b3ef..59c930f276e2 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 @@ static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) 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 @@ static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) #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); -- GitLab