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 77161C433F5 for ; Tue, 7 Dec 2021 09:50:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234351AbhLGJx4 (ORCPT ); Tue, 7 Dec 2021 04:53:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229873AbhLGJxz (ORCPT ); Tue, 7 Dec 2021 04:53:55 -0500 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0462BC061574; Tue, 7 Dec 2021 01:50:26 -0800 (PST) Received: by mail-pf1-x42d.google.com with SMTP id u80so12951024pfc.9; Tue, 07 Dec 2021 01:50:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=g9v1gEiTaCcmm9Ipr1ZhTI3gfkBKIxC9zvlLuNxve5w=; b=nUqguKBP6eJ+p9sbAz5TrcJPZwzURDTfvyPkZkFcqJLapZyiHUMzWVBD9lM0ebskMS g9cA+y8ZpU2Rfs9RxBkRBbsmdUI22ABcBgsHzuBCgXfWY7i6JfyX+3cfODrhipPEQa7H GAogE1IVyn5S97r2v2kwMVd/6ZIkyDJSgcYVpfgUx11UlmW98tmYkRPwniF5nvi+UqUE t1AcKHJ/c4oQyHMeNFdWjbYHJ9FF29j3yn/tPeP0cV6tCKC390QZI7cmUrYXhj4Ai0Nz aoRHyZVZktIHlLmuDNKqmAoDX2UWYNN51rxDL5QVaD19kow9O2lKnGyjJrYk1hn4F1Y6 5WqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=g9v1gEiTaCcmm9Ipr1ZhTI3gfkBKIxC9zvlLuNxve5w=; b=ieWFVfNaFS4X3wYsDpOFPA5e4qp0PIIIF6fNCkA9trmTK8I05QIGi8iCCfEoZcsxkS pgurc8+Uu5TUUoh6wq+rtwVoIqCIovF40tsglSAB9PT/veQzdpJHVIGAyP9yriLgmuxn eUtVdP0FElfUs8r5XcHKi4GeKazQjpG2ahrBnRhylkFsTytYNJBCsUrT69M07TddWKA1 PXCjNmIBwQaOHRKjE+iYgSyJuRCPPgkhxnA2ZQwi2O1NOQlB7+Wi0vchZEueEyxGAUft 46mbfNt1Pq+KvTNDTUG9wMhxFZr7LjMvFwgPcFZG7fyCBF7CSBvZBzSL32vOYdHI7+jz pRgA== X-Gm-Message-State: AOAM530OALiKLV7odFsIlemtPA1++O5j+4cExax31rpkF3yBJ5qdMjQl QIiYG/+n6jWEt3k+gbFEe3Lxljw09o8= X-Google-Smtp-Source: ABdhPJwxBuESsfuL6Lk10423rx+9fimCI4T2qa3tA0b4fqWoe91Xnw1TvAeMXkiD0ZDGu4/wFJtsiA== X-Received: by 2002:a05:6a00:b49:b0:49f:bad2:bd7c with SMTP id p9-20020a056a000b4900b0049fbad2bd7cmr42447835pfo.64.1638870625404; Tue, 07 Dec 2021 01:50:25 -0800 (PST) Received: from localhost ([47.88.60.64]) by smtp.gmail.com with ESMTPSA id m6sm12423138pgs.18.2021.12.07.01.50.24 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 Dec 2021 01:50:25 -0800 (PST) From: Lai Jiangshan To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Paolo Bonzini Cc: Lai Jiangshan Subject: [PATCH 0/4] KVM: X86: Improve permission_fault() for SMAP Date: Tue, 7 Dec 2021 17:50:35 +0800 Message-Id: <20211207095039.53166-1-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lai Jiangshan permission_fault() calls two callbacks to get CPL and RFLAGS for SMAP, but it is unneeded for some cases, this patchset improves it. Lai Jiangshan (4): KVM: X86: Fix comments in update_permission_bitmask KVM: X86: Rename variable smap to not_smap in permission_fault() KVM: X86: Handle implicit supervisor access with SMAP KVM: X86: Only get rflags when needed in permission_fault() arch/x86/include/asm/kvm_host.h | 9 +++++++ arch/x86/kvm/mmu.h | 45 +++++++++++++++++++++------------ arch/x86/kvm/mmu/mmu.c | 8 +++--- arch/x86/kvm/x86.c | 20 ++++++++++++--- 4 files changed, 59 insertions(+), 23 deletions(-) -- 2.19.1.6.gb485710b