From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F3A0C4727D for ; Wed, 23 Sep 2020 18:42:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1AD02208B6 for ; Wed, 23 Sep 2020 18:42:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726864AbgIWSmy (ORCPT ); Wed, 23 Sep 2020 14:42:54 -0400 Received: from mga14.intel.com ([192.55.52.115]:9840 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726773AbgIWSmj (ORCPT ); Wed, 23 Sep 2020 14:42:39 -0400 IronPort-SDR: tjvLHaFuhsZQ3suH6JnRuejKE8Q73RULv+fEjKUnvtW1K7Xf4FoxsO//EhsWHH9K3a1uiWHmIZ QCXtDg58rwRw== X-IronPort-AV: E=McAfee;i="6000,8403,9753"; a="160276868" X-IronPort-AV: E=Sophos;i="5.77,293,1596524400"; d="scan'208";a="160276868" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2020 11:37:38 -0700 IronPort-SDR: 0dI5XWKiAV94jrqzn/5qZQ9UBXuf857qBWo85Twb+wnPwwG1AVWVg5cFF7LZmy8dSdeLY/ac47 I5q0pxRni1hQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,293,1596524400"; d="scan'208";a="486561633" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.160]) by orsmga005.jf.intel.com with ESMTP; 23 Sep 2020 11:37:37 -0700 From: Sean Christopherson To: Paolo Bonzini Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Junaid Shahid Subject: [PATCH v2 8/8] KVM: x86/mmu: Track write/user faults using bools Date: Wed, 23 Sep 2020 11:37:35 -0700 Message-Id: <20200923183735.584-9-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200923183735.584-1-sean.j.christopherson@intel.com> References: <20200923183735.584-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use bools to track write and user faults throughout the page fault paths and down into mmu_set_spte(). The actual usage is purely boolean, but that's not obvious without digging into all paths as the current code uses a mix of bools (TDP and try_async_pf) and ints (shadow paging and mmu_set_spte()). No true functional change intended (although the pgprintk() will now print 0/1 instead of 0/PFERR_WRITE_MASK). Signed-off-by: Sean Christopherson --- arch/x86/kvm/mmu/mmu.c | 4 ++-- arch/x86/kvm/mmu/paging_tmpl.h | 10 +++++----- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index fbee958927ce..a49a98ae1b25 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -3064,7 +3064,7 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep, } static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep, - unsigned int pte_access, int write_fault, int level, + unsigned int pte_access, bool write_fault, int level, gfn_t gfn, kvm_pfn_t pfn, bool speculative, bool host_writable) { @@ -3161,7 +3161,7 @@ static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu, return -1; for (i = 0; i < ret; i++, gfn++, start++) { - mmu_set_spte(vcpu, start, access, 0, sp->role.level, gfn, + mmu_set_spte(vcpu, start, access, false, sp->role.level, gfn, page_to_pfn(pages[i]), true, true); put_page(pages[i]); } diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h index 84ea1094fbe2..012ef1548983 100644 --- a/arch/x86/kvm/mmu/paging_tmpl.h +++ b/arch/x86/kvm/mmu/paging_tmpl.h @@ -550,7 +550,7 @@ FNAME(prefetch_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, * we call mmu_set_spte() with host_writable = true because * pte_prefetch_gfn_to_pfn always gets a writable pfn. */ - mmu_set_spte(vcpu, spte, pte_access, 0, PG_LEVEL_4K, gfn, pfn, + mmu_set_spte(vcpu, spte, pte_access, false, PG_LEVEL_4K, gfn, pfn, true, true); kvm_release_pfn_clean(pfn); @@ -630,7 +630,7 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, gpa_t addr, bool prefault) { bool nx_huge_page_workaround_enabled = is_nx_huge_page_enabled(); - int write_fault = error_code & PFERR_WRITE_MASK; + bool write_fault = error_code & PFERR_WRITE_MASK; bool exec = error_code & PFERR_FETCH_MASK; bool huge_page_disallowed = exec && nx_huge_page_workaround_enabled; struct kvm_mmu_page *sp = NULL; @@ -743,7 +743,7 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, gpa_t addr, */ static bool FNAME(is_self_change_mapping)(struct kvm_vcpu *vcpu, - struct guest_walker *walker, int user_fault, + struct guest_walker *walker, bool user_fault, bool *write_fault_to_shadow_pgtable) { int level; @@ -781,8 +781,8 @@ FNAME(is_self_change_mapping)(struct kvm_vcpu *vcpu, static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gpa_t addr, u32 error_code, bool prefault) { - int write_fault = error_code & PFERR_WRITE_MASK; - int user_fault = error_code & PFERR_USER_MASK; + bool write_fault = error_code & PFERR_WRITE_MASK; + bool user_fault = error_code & PFERR_USER_MASK; struct guest_walker walker; int r; kvm_pfn_t pfn; -- 2.28.0