On Fri, 2022-07-08 at 16:42 +0200, Vitaly Kuznetsov wrote: > VM_ENTRY_IA32E_MODE control is toggled dynamically by vmx_set_efer() > and setup_vmcs_config() doesn't check its existence. On the contrary, > nested_vmx_setup_ctls_msrs() doesn set it on x86_64. Add the missing > check and filter the bit out in vmx_vmentry_ctrl(). > > No (real) functional change intended as all existing CPUs supporting > long mode and VMX are supposed to have it. > > Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx> > Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > --- > arch/x86/kvm/vmx/vmx.c | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > > diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c > index dd905ad72637..1aaec4d19e1b 100644 > --- a/arch/x86/kvm/vmx/vmx.c > +++ b/arch/x86/kvm/vmx/vmx.c > @@ -2610,6 +2610,9 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf, > _pin_based_exec_control &= ~PIN_BASED_POSTED_INTR; > > min = VM_ENTRY_LOAD_DEBUG_CONTROLS; > +#ifdef CONFIG_X86_64 > + min |= VM_ENTRY_IA32E_MODE; > +#endif > opt = VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | > VM_ENTRY_LOAD_IA32_PAT | > VM_ENTRY_LOAD_IA32_EFER | > @@ -4242,9 +4245,14 @@ static u32 vmx_vmentry_ctrl(void) > if (vmx_pt_mode_is_system()) > vmentry_ctrl &= ~(VM_ENTRY_PT_CONCEAL_PIP | > VM_ENTRY_LOAD_IA32_RTIT_CTL); > - /* Loading of EFER and PERF_GLOBAL_CTRL are toggled dynamically */ > - return vmentry_ctrl & > - ~(VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | VM_ENTRY_LOAD_IA32_EFER); > + /* > + * IA32e mode, and loading of EFER and PERF_GLOBAL_CTRL are toggled dynamically. > + */ > + vmentry_ctrl &= ~(VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | > + VM_ENTRY_LOAD_IA32_EFER | > + VM_ENTRY_IA32E_MODE); > + > + return vmentry_ctrl; > } > > static u32 vmx_vmexit_ctrl(void) Reviewed-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx> Best regards, Maxim Levitsky
