mirror of https://gitee.com/openkylin/linux.git
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>
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@ -1904,16 +1904,6 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
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vcpu_load(vcpu);
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vcpu_load(vcpu);
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set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
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set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
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set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
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set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
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set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
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set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
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set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
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set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
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dt.limit = sregs->idt.limit;
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dt.limit = sregs->idt.limit;
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dt.base = sregs->idt.base;
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dt.base = sregs->idt.base;
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kvm_arch_ops->set_idt(vcpu, &dt);
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kvm_arch_ops->set_idt(vcpu, &dt);
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@ -1953,6 +1943,16 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
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if (vcpu->irq_pending[i])
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if (vcpu->irq_pending[i])
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__set_bit(i, &vcpu->irq_summary);
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__set_bit(i, &vcpu->irq_summary);
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set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
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set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
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set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
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set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
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set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
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set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
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set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
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set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
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vcpu_put(vcpu);
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vcpu_put(vcpu);
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return 0;
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return 0;
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