KVM: VMX: Don't expose PLE enable if there is no hardware support

KVM doesn't expose the PLE capability to the L1 hypervisor, however,
ple_window still shows the default value on L1 hypervisor. This patch
fixes it by clearing all the PLE related module parameter if there is
no PLE capability.

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 95a01609d7eea13633a6d53383a6e2859463c3e5..941185e0606be56348b92759140d94fdf4310d2f 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6779,8 +6779,13 @@ static __init int hardware_setup(void)
        if (enable_ept && !cpu_has_vmx_ept_2m_page())
                kvm_disable_largepages();
 
-       if (!cpu_has_vmx_ple())
+       if (!cpu_has_vmx_ple()) {
                ple_gap = 0;
+               ple_window = 0;
+               ple_window_grow = 0;
+               ple_window_max = 0;
+               ple_window_shrink = 0;
+       }
 
        if (!cpu_has_vmx_apicv()) {
                enable_apicv = 0;