KVM: vmx: we do rely on loading DR7 on entry

Currently, this works even if the bit is not in "min", because the bit is always
set in MSR_IA32_VMX_ENTRY_CTLS.  Mention it for the sake of documentation, and
to avoid surprises if we later switch to MSR_IA32_VMX_TRUE_ENTRY_CTLS.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index fcc1947db29671758c9b76a0efe5e7a70d617a7d..b2a913bb07e0cc58377f39f4cc8c6f1fe49d85ed 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2871,7 +2871,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
                !(_vmexit_control & VM_EXIT_ACK_INTR_ON_EXIT))
                _pin_based_exec_control &= ~PIN_BASED_POSTED_INTR;
 
-       min = 0;
+       min = VM_ENTRY_LOAD_DEBUG_CONTROLS;
        opt = VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_BNDCFGS;
        if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
                                &_vmentry_control) < 0)