From 024aa1c02f0a9f938af83f55c727bcb18187eba4 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Wed, 21 Mar 2007 13:44:58 +0200 Subject: KVM: Modify guest segments after potentially switching modes The SET_SREGS ioctl modifies both cr0.pe (real mode/protected mode) and guest segment registers. Since segment handling is modified by the mode on Intel procesors, update the segment registers after the mode switch has taken place. Signed-off-by: Avi Kivity --- drivers/kvm/kvm_main.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'drivers/kvm') diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index b998bc68e9f2..05235e1751fb 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -1904,16 +1904,6 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, vcpu_load(vcpu); - set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); - set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); - set_segment(vcpu, &sregs->es, VCPU_SREG_ES); - set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); - set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); - set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); - - set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); - set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); - dt.limit = sregs->idt.limit; dt.base = sregs->idt.base; kvm_arch_ops->set_idt(vcpu, &dt); @@ -1953,6 +1943,16 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, if (vcpu->irq_pending[i]) __set_bit(i, &vcpu->irq_summary); + set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); + set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); + set_segment(vcpu, &sregs->es, VCPU_SREG_ES); + set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); + set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); + set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); + + set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); + set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); + vcpu_put(vcpu); return 0; -- cgit v1.2.3