From: Wanpeng Li <wanpeng.li@hotmail.com>
Date: Thu, 28 Sep 2017 18:06:24 -0700
Subject: KVM: VMX: Don't expose PLE enable if there is no hardware support
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Patch-mainline: v4.15-rc1
Git-commit: 0f107682cb0398265d80237c353a6fa93161d219
References: bsc#1077761
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>
Acked-by: Alexander Graf <agraf@suse.de>
---
arch/x86/kvm/vmx.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6766,8 +6766,13 @@
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;