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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D981C433EF for ; Fri, 29 Apr 2022 01:04:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353707AbiD2BHl (ORCPT ); Thu, 28 Apr 2022 21:07:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353680AbiD2BHf (ORCPT ); Thu, 28 Apr 2022 21:07:35 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62EF7BC865 for ; Thu, 28 Apr 2022 18:04:19 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id l72-20020a63914b000000b003c1ac4355f5so641pge.4 for ; Thu, 28 Apr 2022 18:04:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:message-id:mime-version:subject:from:to:cc; bh=/1wb0EUJMAOVjEcNcUn77zKNCe+7w/+d1xa9d1eIEYw=; b=sjl1W+oS3wTgYKVlkQFCV2ylujEI4H1j269rgfGJ12THGn5+Rvk4vLClgn0o7czy4s j01ESF7enfH8zDQBtCV+mxjNVBkkm+rLKvUHMXNm9oJyGUk3H2RZu3HiFCx5EFp28ohW 0GPYxySnIUaTAcFsEi50p2wnwAF9EDayimNf0f+O0R1gtwiBZSMlKo7rGI09N93tZ/ww bz77QOUjQQF2JCU5rLECAdd3GK4qGHZsdTzhLJc0jO0qi8nDrrvwGXul5qHfPzKD8uLK +A1OKQqF5JBS6WrOyqqFvpzN9EeyGxRpls3oqRbg2MbE1l1ENz8RD7XOVds3FVF0wb2T O0XA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:message-id:mime-version:subject :from:to:cc; bh=/1wb0EUJMAOVjEcNcUn77zKNCe+7w/+d1xa9d1eIEYw=; b=s2HfPq7wW6uHyEQTozO69cNK8ADxphL/bMSo3f1OrNk04qRpATS5X5Skq22gB9kCgb DT0hRFfP+TRm7LkJkUUq2jKleHbYvy0mQr2IOtFyLslaFSGieP2I+Wvk3rje51lRtTeD VW96vbI5IMDYRVtSt5Dj60GCd5Ad+skNZ7r3tkwoeMb18yH1PdUiBbqVVWL1KdqbMxG9 wuNw19qSGiuokLUIuvwlX6x+jN1UhMVspqHO1Np7irJhBVmsjLxZYKfV/v1/hTcvgYEg PwCQ2TOWnlU8Jj1KTo6U+xPAaVkuq+NM+nY0ixSlJ99mvS9FUSU7/s/rrw0dj81MOO4z fobA== X-Gm-Message-State: AOAM533Ozv4YWbBxx9wQBeTkFy0tjAtx+lCzV3shNdXgjIhL74eW9+QH iZJgFEq7m60wtR+IT8y8gCDv5zoop74= X-Google-Smtp-Source: ABdhPJwbWXQVHFF1qK8TuOCj10tHHD5fJztnTGKmSRlsECbDASEEZkNbM4JFFFCD6hU3qDT7mQgxB3wI198= X-Received: from seanjc.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:3e5]) (user=seanjc job=sendgmr) by 2002:a05:6a00:2391:b0:50a:3ea9:e84d with SMTP id f17-20020a056a00239100b0050a3ea9e84dmr37688617pfc.21.1651194258843; Thu, 28 Apr 2022 18:04:18 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 29 Apr 2022 01:04:06 +0000 Message-Id: <20220429010416.2788472-1-seanjc@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.36.0.464.gb9c8b46e94-goog Subject: [PATCH 00/10] KVM: Clean up 'struct page' / pfn helpers 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 Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Clean up KVM's struct page / pfn helpers to reduce the number of pfn_to_page() and page_to_pfn() conversions. E.g. kvm_release_pfn_dirty() makes 6 (if I counted right) calls to pfn_to_page() when releasing a dirty pfn that backed by a vanilla struct page. That is easily trimmed down to a single call. And perhaps more importantly, rename and refactor kvm_is_reserved_pfn() to try and better reflect what it actually queries, which at this point is effectively whether or not the pfn is backed by a refcounted page. Sean Christopherson (10): KVM: Do not zero initialize 'pfn' in hva_to_pfn() KVM: Drop bogus "pfn != 0" guard from kvm_release_pfn() KVM: Don't set Accessed/Dirty bits for ZERO_PAGE KVM: Avoid pfn_to_page() and vice versa when releasing pages KVM: nVMX: Use kvm_vcpu_map() to get/pin vmcs12's APIC-access page KVM: Don't WARN if kvm_pfn_to_page() encounters a "reserved" pfn KVM: Remove kvm_vcpu_gfn_to_page() and kvm_vcpu_gpa_to_page() KVM: Take a 'struct page', not a pfn in kvm_is_zone_device_page() KVM: Rename/refactor kvm_is_reserved_pfn() to kvm_pfn_to_refcounted_page() KVM: x86/mmu: Shove refcounted page dependency into host_pfn_mapping_level() arch/x86/kvm/mmu/mmu.c | 26 +++++-- arch/x86/kvm/mmu/tdp_mmu.c | 3 +- arch/x86/kvm/vmx/nested.c | 39 ++++------- arch/x86/kvm/vmx/vmx.h | 2 +- include/linux/kvm_host.h | 12 +--- virt/kvm/kvm_main.c | 140 +++++++++++++++++++++++++------------ 6 files changed, 131 insertions(+), 91 deletions(-) base-commit: 2a39d8b39bffdaf1a4223d0d22f07baee154c8f3 -- 2.36.0.464.gb9c8b46e94-goog