From patchwork Sat Feb 13 08:01:24 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Kivity X-Patchwork-Id: 79101 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o1D84NxH024611 for ; Sat, 13 Feb 2010 08:04:23 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752968Ab0BMICK (ORCPT ); Sat, 13 Feb 2010 03:02:10 -0500 Received: from mx1.redhat.com ([209.132.183.28]:2344 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752156Ab0BMICD (ORCPT ); Sat, 13 Feb 2010 03:02:03 -0500 Received: from int-mx03.intmail.prod.int.phx2.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.16]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o1D821Ip023489 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 13 Feb 2010 03:02:01 -0500 Received: from cleopatra.tlv.redhat.com (cleopatra.tlv.redhat.com [10.35.255.11]) by int-mx03.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o1D820g4006624; Sat, 13 Feb 2010 03:02:01 -0500 Received: from localhost.localdomain (file.tlv.redhat.com [10.35.255.8]) by cleopatra.tlv.redhat.com (Postfix) with ESMTP id 3563325005C; Sat, 13 Feb 2010 10:02:00 +0200 (IST) From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 04/39] KVM: VMX: Enable EPT 1GB page support Date: Sat, 13 Feb 2010 10:01:24 +0200 Message-Id: <1266048119-14325-5-git-send-email-avi@redhat.com> In-Reply-To: <1266048119-14325-1-git-send-email-avi@redhat.com> References: <1266048119-14325-1-git-send-email-avi@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.16 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Sat, 13 Feb 2010 08:04:23 +0000 (UTC) diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 713ed9a..43f1e9b 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -364,6 +364,7 @@ enum vmcs_field { #define VMX_EPTP_UC_BIT (1ull << 8) #define VMX_EPTP_WB_BIT (1ull << 14) #define VMX_EPT_2MB_PAGE_BIT (1ull << 16) +#define VMX_EPT_1GB_PAGE_BIT (1ull << 17) #define VMX_EPT_EXTENT_INDIVIDUAL_BIT (1ull << 24) #define VMX_EPT_EXTENT_CONTEXT_BIT (1ull << 25) #define VMX_EPT_EXTENT_GLOBAL_BIT (1ull << 26) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 12ccf14..4f5508c 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -500,8 +500,7 @@ out: static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn) { struct kvm_memory_slot *slot; - int host_level; - int level = PT_PAGE_TABLE_LEVEL; + int host_level, level, max_level; slot = gfn_to_memslot(vcpu->kvm, large_gfn); if (slot && slot->dirty_bitmap) @@ -512,7 +511,10 @@ static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn) if (host_level == PT_PAGE_TABLE_LEVEL) return host_level; - for (level = PT_DIRECTORY_LEVEL; level <= host_level; ++level) + max_level = kvm_x86_ops->get_lpage_level() < host_level ? + kvm_x86_ops->get_lpage_level() : host_level; + + for (level = PT_DIRECTORY_LEVEL; level <= max_level; ++level) if (has_wrprotected_page(vcpu->kvm, large_gfn, level)) break; diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 0fd0892..9b197b2 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -318,6 +318,11 @@ static inline bool cpu_has_vmx_ept_2m_page(void) return !!(vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT); } +static inline bool cpu_has_vmx_ept_1g_page(void) +{ + return !!(vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT); +} + static inline int cpu_has_vmx_invept_individual_addr(void) { return !!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT); @@ -4038,7 +4043,11 @@ static const struct trace_print_flags vmx_exit_reasons_str[] = { static int vmx_get_lpage_level(void) { - return PT_DIRECTORY_LEVEL; + if (enable_ept && !cpu_has_vmx_ept_1g_page()) + return PT_DIRECTORY_LEVEL; + else + /* For shadow and EPT supported 1GB page */ + return PT_PDPE_LEVEL; } static inline u32 bit(int bitno)