From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jun Nakajima Subject: [PATCH 07/11] nEPT: Advertise EPT to L1 Date: Thu, 25 Apr 2013 23:43:27 -0700 Message-ID: <1366958611-6935-7-git-send-email-jun.nakajima@intel.com> References: <1366958611-6935-1-git-send-email-jun.nakajima@intel.com> <1366958611-6935-2-git-send-email-jun.nakajima@intel.com> <1366958611-6935-3-git-send-email-jun.nakajima@intel.com> <1366958611-6935-4-git-send-email-jun.nakajima@intel.com> <1366958611-6935-5-git-send-email-jun.nakajima@intel.com> <1366958611-6935-6-git-send-email-jun.nakajima@intel.com> To: kvm@vger.kernel.org Return-path: Received: from mail-pb0-f53.google.com ([209.85.160.53]:50781 "EHLO mail-pb0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753605Ab3DZGnx (ORCPT ); Fri, 26 Apr 2013 02:43:53 -0400 Received: by mail-pb0-f53.google.com with SMTP id un15so1046600pbc.12 for ; Thu, 25 Apr 2013 23:43:53 -0700 (PDT) Received: from localhost (c-98-207-34-191.hsd1.ca.comcast.net. [98.207.34.191]) by mx.google.com with ESMTPSA id vv6sm11458659pab.6.2013.04.25.23.43.51 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Thu, 25 Apr 2013 23:43:51 -0700 (PDT) In-Reply-To: <1366958611-6935-6-git-send-email-jun.nakajima@intel.com> Sender: kvm-owner@vger.kernel.org List-ID: Advertise the support of EPT to the L1 guest, through the appropriate MSR. This is the last patch of the basic Nested EPT feature, so as to allow bisection through this patch series: The guest will not see EPT support until this last patch, and will not attempt to use the half-applied feature. Signed-off-by: Nadav Har'El Signed-off-by: Jun Nakajima Signed-off-by: Xinhao Xu --- arch/x86/kvm/vmx.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 66ead51..76df3a8 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2027,6 +2027,7 @@ static u32 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high; static u32 nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high; static u32 nested_vmx_exit_ctls_low, nested_vmx_exit_ctls_high; static u32 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high; +static u32 nested_vmx_ept_caps; static __init void nested_vmx_setup_ctls_msrs(void) { /* @@ -2102,6 +2103,18 @@ static __init void nested_vmx_setup_ctls_msrs(void) nested_vmx_secondary_ctls_low = 0; nested_vmx_secondary_ctls_high &= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; + if (enable_ept) { + /* nested EPT: emulate EPT also to L1 */ + nested_vmx_secondary_ctls_high |= SECONDARY_EXEC_ENABLE_EPT; + nested_vmx_ept_caps = VMX_EPT_PAGE_WALK_4_BIT; + nested_vmx_ept_caps |= + VMX_EPT_INVEPT_BIT | VMX_EPT_EXTENT_GLOBAL_BIT | + VMX_EPT_EXTENT_CONTEXT_BIT | + VMX_EPT_EXTENT_INDIVIDUAL_BIT; + nested_vmx_ept_caps &= vmx_capability.ept; + } else + nested_vmx_ept_caps = 0; + } static inline bool vmx_control_verify(u32 control, u32 low, u32 high) @@ -2201,8 +2214,8 @@ static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) nested_vmx_secondary_ctls_high); break; case MSR_IA32_VMX_EPT_VPID_CAP: - /* Currently, no nested ept or nested vpid */ - *pdata = 0; + /* Currently, no nested vpid support */ + *pdata = nested_vmx_ept_caps; break; default: return 0; -- 1.8.2.1.610.g562af5b