diff options
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/vmx.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index b40066854c1..d63e82e5dbf 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -54,7 +54,8 @@ struct vcpu_vmx { struct { int loaded; u16 fs_sel, gs_sel, ldt_sel; - int fs_gs_ldt_reload_needed; + int gs_ldt_reload_needed; + int fs_reload_needed; }host_state; }; @@ -353,20 +354,21 @@ static void vmx_save_host_state(struct vcpu_vmx *vmx) * allow segment selectors with cpl > 0 or ti == 1. */ vmx->host_state.ldt_sel = read_ldt(); - vmx->host_state.fs_gs_ldt_reload_needed = vmx->host_state.ldt_sel; + vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; vmx->host_state.fs_sel = read_fs(); - if (!(vmx->host_state.fs_sel & 7)) + if (!(vmx->host_state.fs_sel & 7)) { vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); - else { + vmx->host_state.fs_reload_needed = 0; + } else { vmcs_write16(HOST_FS_SELECTOR, 0); - vmx->host_state.fs_gs_ldt_reload_needed = 1; + vmx->host_state.fs_reload_needed = 1; } vmx->host_state.gs_sel = read_gs(); if (!(vmx->host_state.gs_sel & 7)) vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); else { vmcs_write16(HOST_GS_SELECTOR, 0); - vmx->host_state.fs_gs_ldt_reload_needed = 1; + vmx->host_state.gs_ldt_reload_needed = 1; } #ifdef CONFIG_X86_64 @@ -396,9 +398,10 @@ static void vmx_load_host_state(struct vcpu_vmx *vmx) return; vmx->host_state.loaded = 0; - if (vmx->host_state.fs_gs_ldt_reload_needed) { - load_ldt(vmx->host_state.ldt_sel); + if (vmx->host_state.fs_reload_needed) load_fs(vmx->host_state.fs_sel); + if (vmx->host_state.gs_ldt_reload_needed) { + load_ldt(vmx->host_state.ldt_sel); /* * If we have to reload gs, we must take care to * preserve our gs base. @@ -409,9 +412,8 @@ static void vmx_load_host_state(struct vcpu_vmx *vmx) wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); #endif local_irq_restore(flags); - - reload_tss(); } + reload_tss(); save_msrs(vmx->guest_msrs, vmx->save_nmsrs); load_msrs(vmx->host_msrs, vmx->save_nmsrs); if (msr_efer_need_save_restore(vmx)) |