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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E615C433F5 for ; Thu, 18 Nov 2021 11:13:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E4A5561037 for ; Thu, 18 Nov 2021 11:13:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344017AbhKRLQy (ORCPT ); Thu, 18 Nov 2021 06:16:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343862AbhKRLOt (ORCPT ); Thu, 18 Nov 2021 06:14:49 -0500 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB0E7C0611A6; Thu, 18 Nov 2021 03:09:27 -0800 (PST) Received: by mail-pl1-x62e.google.com with SMTP id m24so4913782pls.10; Thu, 18 Nov 2021 03:09:27 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=YdfW8Ysp7XBeV8ztjWWa4B1sDAxYZYhnWqDn9ynnIjc=; b=hBlI2UjiYvGgt8fATl1AxekZFCzNUNKO5mUH+Rv83sZ1AxYQp8AwuHhWm0F4Wp+Y10 nLbMefcT4QvRK5ZCNbNL1YHq7jOr6pGKGncBmi8DNcO+R4mLUJnL9qLjHnCo2qWRpRfS efHGRCezvu5dftNFiuuvySIOCtOqyKpDyeI4ARHx2prGvrd+bjlA/ci0SKC0rjW5pagi 9pRrvKTWbNiJM17begN92SPTsR2kJLUp7JKzkzaTdq4frSwQoF/E1wT+761PMC7qXrlx 4Raj7snrGpKBZZ4+QKl8ktV+VijNt9vUkEUAKV2MzaKmmUw3wHf8FBTm2jxr/hTcAFa1 Rj0g== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=YdfW8Ysp7XBeV8ztjWWa4B1sDAxYZYhnWqDn9ynnIjc=; b=JbAAkhwHeB68LYCcHwMVtVQ/1DJ+M0onpCPBjFjApI5o/B+1tgn88aD86KWVI+s5H5 eycxvL/USNxVMQGWT66POa0bgkDeOgh5/KPnL6MVylz2d1S9Wwe/CkrSgkqQ9t0AxJY9 8CbIn/OenzrkbOOIXDCdXtGBeasVdwzRyr7voJ6bR336TpirUSk2vfnndvqB/zSZLn3i +OlEZnwU/vYbBvo8dQF4aBRzzMISKvHg0UHIc6ZaSdsrDv+TAK0+eGJ9DovZKlQu+Nsf 5aevD09Qjx7D7GOaNvf1ZqIIIBFTABMF+ty1O60TW/6Nrc9wL6i+k6iqq5Lr0/L4ucVg KxjQ== X-Gm-Message-State: AOAM531FGKOsIy/Cz6iOFw3rsvM/r0S008BOQD9xkPKYOenbiINdHxxf jF3ytwAg7HkjPoNEfLZClWImHEhpk3A= X-Google-Smtp-Source: ABdhPJwh6mKtD+fwsCkurbQB+PShEkSx8rRBCbSHyaLiXoKD0oXPQwsBXEVMr0ES89UqFPANYAOgWA== X-Received: by 2002:a17:90b:3a89:: with SMTP id om9mr9427252pjb.29.1637233767086; Thu, 18 Nov 2021 03:09:27 -0800 (PST) Received: from localhost ([47.88.60.64]) by smtp.gmail.com with ESMTPSA id y18sm3423546pfa.142.2021.11.18.03.09.25 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 18 Nov 2021 03:09:26 -0800 (PST) From: Lai Jiangshan To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, Lai Jiangshan , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" Subject: [PATCH 14/15] KVM: X86: Calculate quadrant when !role.gpte_is_8_bytes Date: Thu, 18 Nov 2021 19:08:13 +0800 Message-Id: <20211118110814.2568-15-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20211118110814.2568-1-jiangshanlai@gmail.com> References: <20211118110814.2568-1-jiangshanlai@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Lai Jiangshan role.quadrant is only valid when gpte size is 4 bytes and only be calculated when gpte size is 4 bytes. Although "vcpu->arch.mmu->root_level <= PT32_ROOT_LEVEL" also means gpte size is 4 bytes, but using "!role.gpte_is_8_bytes" is clearer Signed-off-by: Lai Jiangshan --- arch/x86/kvm/mmu/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index db8b64971f25..6948f2d696c3 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -2083,7 +2083,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, role.level = level; role.direct = direct; role.access = access; - if (!direct_mmu && vcpu->arch.mmu->root_level <= PT32_ROOT_LEVEL) { + if (!direct_mmu && !role.gpte_is_8_bytes) { quadrant = gaddr >> (PAGE_SHIFT + (PT64_PT_BITS * level)); quadrant &= (1 << ((PT32_PT_BITS - PT64_PT_BITS) * level)) - 1; role.quadrant = quadrant; -- 2.19.1.6.gb485710b