Change PLE window into per-VCPU variable, seeded from module parameter, to allow greater flexibility.
Brings in a small overhead on every vmentry. Signed-off-by: Radim Krčmář <rkrc...@redhat.com> --- arch/x86/kvm/vmx.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 2b306f9..18e0e52 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -484,6 +484,9 @@ struct vcpu_vmx { /* Support for a guest hypervisor (nested VMX) */ struct nested_vmx nested; + + /* Dynamic PLE window. */ + int ple_window; }; enum segment_cache_field { @@ -4402,7 +4405,7 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx) if (ple_gap) { vmcs_write32(PLE_GAP, ple_gap); - vmcs_write32(PLE_WINDOW, ple_window); + vmx->ple_window = ple_window; } vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0); @@ -7387,6 +7390,9 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) if (vmx->emulation_required) return; + if (ple_gap) + vmcs_write32(PLE_WINDOW, vmx->ple_window); + if (vmx->nested.sync_shadow_vmcs) { copy_vmcs12_to_shadow(vmx); vmx->nested.sync_shadow_vmcs = false; -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html