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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 <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-03-21 13:44:58 +02:00
parent f6528b03f1
commit 024aa1c02f
1 changed files with 10 additions and 10 deletions
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20
drivers/kvm/kvm_main.c
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@ -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;