提交 0a77fe4c 编写于 作者: A Avi Kivity 提交者: Marcelo Tosatti

KVM: Correct ordering of ldt reload wrt fs/gs reload

If fs or gs refer to the ldt, they must be reloaded after the ldt.  Reorder
the code to that effect.

Userspace code that uses the ldt with kvm is nonexistent, so this doesn't fix
a user-visible bug.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
上级 59365d13
无相关合并请求
......@@ -3395,6 +3395,7 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
load_host_msrs(vcpu);
kvm_load_ldt(ldt_selector);
loadsegment(fs, fs_selector);
#ifdef CONFIG_X86_64
load_gs_index(gs_selector);
......@@ -3402,7 +3403,6 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
#else
loadsegment(gs, gs_selector);
#endif
kvm_load_ldt(ldt_selector);
reload_tss(vcpu);
......
......@@ -839,8 +839,6 @@ static void __vmx_load_host_state(struct vcpu_vmx *vmx)
++vmx->vcpu.stat.host_state_reload;
vmx->host_state.loaded = 0;
if (vmx->host_state.fs_reload_needed)
loadsegment(fs, vmx->host_state.fs_sel);
if (vmx->host_state.gs_ldt_reload_needed) {
kvm_load_ldt(vmx->host_state.ldt_sel);
#ifdef CONFIG_X86_64
......@@ -850,6 +848,8 @@ static void __vmx_load_host_state(struct vcpu_vmx *vmx)
loadsegment(gs, vmx->host_state.gs_sel);
#endif
}
if (vmx->host_state.fs_reload_needed)
loadsegment(fs, vmx->host_state.fs_sel);
reload_tss();
#ifdef CONFIG_X86_64
if (is_long_mode(&vmx->vcpu)) {
......
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