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=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 E8986C54E4A for ; Tue, 12 May 2020 10:34:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3C5F206DD for ; Tue, 12 May 2020 10:34:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="NVNpTVig" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729375AbgELKeN (ORCPT ); Tue, 12 May 2020 06:34:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1729336AbgELKeN (ORCPT ); Tue, 12 May 2020 06:34:13 -0400 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54E51C061A0C; Tue, 12 May 2020 03:34:13 -0700 (PDT) Received: by mail-pj1-x1033.google.com with SMTP id a7so9181465pju.2; Tue, 12 May 2020 03:34:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=Ahbqm97UA9X6sXan9XG+HLCRcdefKOFp3FssCpJpsAM=; b=NVNpTVigdLBPU6s8FGbGQTFErOn//3CWOt481/9mOZjpdIzRucAzoKMM5j8pl8Rj+v 17MZUbYyiWRDBAhu5FhGtpbePKFxq6uVwuhALY5yRSAfGLcTT6BSoaQpbSzmwRwZdAE1 MY3/Xbb+ZfFZAchMQitv2Lw0h/o9YC7+t2velTCb2QYE4U53dm8SkroC3ILgn5Axe3iL SaPC6LW2Pg+Un92VgR56CRmiRRghnQZa5f0h7R2JYStPZhDcVx/nP7vYlpuovGfnCavL ylNdYhngM1scDj592fTNpqcUuV3hkJcHc/sdw79o4gQ99MXuxKomVwER1Pyxx+3Ku8s4 wWZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=Ahbqm97UA9X6sXan9XG+HLCRcdefKOFp3FssCpJpsAM=; b=U/9i86a//mIiXlCNSjpjdDVkkDE2uzmN61zeDV8EXg38CfRp1frwZXFzYjImeZgYkm 1wVeWIOYPcYIsDFP79dOXbo5Cqe4EnLqJiB2D3t2kmRJRBIIm6DBDhOoWb1dKPTFKRFv 1S9oUqLTOdC6aS0Kx5ybrQ7HlLyFtKKnKnN6BVSCpPFUuq6bOeOhhC0RQn8ziHxQ67a9 rG0jJHoAHoGMkCQ73z+J5ni0ObCDK/DoA68qDvmTinF7OAqz5OgXkF3xyQ/fu3gsEYmE 0a+7yiBIBcQEIkiLJMgf1eDAr+DMip1liU6jSkEEhIxDbMG3oMPJcf9h1bOf0WGKSKqs X0fg== X-Gm-Message-State: AGi0PuYIWBDYaNoq8AWaxAYOTLbmAZCMolUW/LkNjooLv+/q4X7zf9qq kWH8bJ2W6VSdjgaz/CtI6vE= X-Google-Smtp-Source: APiQypJfHrQlVPqlEL3pEUleud2EPcz3knZFhoRe3RnTtpI7sVHpJGjzHWF7P1OcfVrKAHexPDBO6A== X-Received: by 2002:a17:90a:1984:: with SMTP id 4mr28851748pji.36.1589279652865; Tue, 12 May 2020 03:34:12 -0700 (PDT) Received: from software.domain.org (28.144.92.34.bc.googleusercontent.com. [34.92.144.28]) by smtp.gmail.com with ESMTPSA id q11sm11617094pfl.97.2020.05.12.03.34.10 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 May 2020 03:34:12 -0700 (PDT) From: Huacai Chen To: Paolo Bonzini , Thomas Bogendoerfer , Aleksandar Markovic Cc: kvm@vger.kernel.org, linux-mips@vger.kernel.org, Fuxin Zhang , Huacai Chen , Jiaxun Yang , Huacai Chen Subject: [PATCH V4 07/14] KVM: MIPS: Use root tlb to control guest's CCA for Loongson-3 Date: Tue, 12 May 2020 18:31:13 +0800 Message-Id: <1589279480-27722-8-git-send-email-chenhc@lemote.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1589279480-27722-1-git-send-email-chenhc@lemote.com> References: <1589279480-27722-1-git-send-email-chenhc@lemote.com> Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org KVM guest has two levels of address translation: guest tlb translates GVA to GPA, and root tlb translates GPA to HPA. By default guest's CCA is controlled by guest tlb, but Loongson-3 maintains all cache coherency by hardware (including multi-core coherency and I/O DMA coherency) so it prefers all guest mappings be cacheable mappings. Thus, we use root tlb to control guest's CCA for Loongson-3. Reviewed-by: Aleksandar Markovic Signed-off-by: Huacai Chen Co-developed-by: Jiaxun Yang --- arch/mips/kvm/vz.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c index 422cd06..f9fbbc16 100644 --- a/arch/mips/kvm/vz.c +++ b/arch/mips/kvm/vz.c @@ -2871,6 +2871,12 @@ static int kvm_vz_hardware_enable(void) if (cpu_has_guestctl2) clear_c0_guestctl2(0x3f << 10); +#ifdef CONFIG_CPU_LOONGSON64 + /* Control guest CCA attribute */ + if (cpu_has_csr()) + csr_writel(csr_readl(0xffffffec) | 0x1, 0xffffffec); +#endif + return 0; } -- 2.7.0