From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752059AbdI0Geg (ORCPT ); Wed, 27 Sep 2017 02:34:36 -0400 Received: from mail-pg0-f68.google.com ([74.125.83.68]:33846 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750934AbdI0Gec (ORCPT ); Wed, 27 Sep 2017 02:34:32 -0400 X-Google-Smtp-Source: AOwi7QDbF+4sF0ftQHyTzVivBadVkglztvwSVyJlmRvSBkShMF4TszSQVI1uUNNdlsI2kh7tWUccNA== From: Wanpeng Li X-Google-Original-From: Wanpeng Li To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Wanpeng Li Subject: [PATCH 2/2] KVM: VMX: Don't expose PLE enable if there is no hardware support Date: Tue, 26 Sep 2017 23:34:22 -0700 Message-Id: <1506494062-25533-2-git-send-email-wanpeng.li@hotmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1506494062-25533-1-git-send-email-wanpeng.li@hotmail.com> References: <1506494062-25533-1-git-send-email-wanpeng.li@hotmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wanpeng Li PLE_Window: Software can configure this field as an upper bound on the amount of time a guest is allowed to execute in a PAUSE LOOP. KVM doesn't expose the PLE capability to the L1 hypervsior, however, ple_window still shows the default value on L1 hypervsior. This patch fixes it by clearing all the PLE related module parameter if there is no PLE capability. Cc: Paolo Bonzini Cc: Radim Krčmář Signed-off-by: Wanpeng Li --- arch/x86/kvm/vmx.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index c83d28b..4d4f9b4 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6781,8 +6781,13 @@ 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; -- 2.7.4