diff options
| -rw-r--r-- | drivers/kvm/vmx.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index 9ebb18d07bd..49cadd31120 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -1832,16 +1832,21 @@ preempted: * Set host fs and gs selectors. Unfortunately, 22.2.3 does not * allow segment selectors with cpl > 0 or ti == 1. */ - fs_sel = read_fs(); - gs_sel = read_gs(); ldt_sel = read_ldt(); - fs_gs_ldt_reload_needed = (fs_sel & 7) | (gs_sel & 7) | ldt_sel; - if (!fs_gs_ldt_reload_needed) { + fs_gs_ldt_reload_needed = ldt_sel; + fs_sel = read_fs(); + if (!(fs_sel & 7)) vmcs_write16(HOST_FS_SELECTOR, fs_sel); - vmcs_write16(HOST_GS_SELECTOR, gs_sel); - } else { + else { vmcs_write16(HOST_FS_SELECTOR, 0); + fs_gs_ldt_reload_needed = 1; + } + gs_sel = read_gs(); + if (!(gs_sel & 7)) + vmcs_write16(HOST_GS_SELECTOR, gs_sel); + else { vmcs_write16(HOST_GS_SELECTOR, 0); + fs_gs_ldt_reload_needed = 1; } #ifdef CONFIG_X86_64 @@ -2035,11 +2040,6 @@ again: } out: - /* - * Reload segment selectors ASAP. (it's needed for a functional - * kernel: x86 relies on having __KERNEL_PDA in %fs and x86_64 - * relies on having 0 in %gs for the CPU PDA to work.) - */ if (fs_gs_ldt_reload_needed) { load_ldt(ldt_sel); load_fs(fs_sel); |