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 1DC25CA90AF for ; Wed, 13 May 2020 08:45:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECF44206F5 for ; Wed, 13 May 2020 08:45:01 +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="kf2iMY5L" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732328AbgEMIpB (ORCPT ); Wed, 13 May 2020 04:45:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732279AbgEMIpB (ORCPT ); Wed, 13 May 2020 04:45:01 -0400 Received: from mail-pj1-x1042.google.com (mail-pj1-x1042.google.com [IPv6:2607:f8b0:4864:20::1042]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 76152C061A0C; Wed, 13 May 2020 01:45:01 -0700 (PDT) Received: by mail-pj1-x1042.google.com with SMTP id t9so10824805pjw.0; Wed, 13 May 2020 01:45:01 -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=G0AgtVhRiXtYv7GiuMfsQdi40RXSl8uWCB+fvVpYccA=; b=kf2iMY5L93sEo/Ug6YcUz5qSM3wX5PMqKTw3nxPzWoFWpDvwokpY7lOaOwn7Ipv8PQ G1qytgcHKNqN5trVuoaD5yHoY+mKjAlIdzljfORqH3uGZCjf/tcOK8iypPe3zjzgZ2i3 08zc9DUXO2cf3DvRG3zz/6+FmlOJ57Uli2tLl5sglUrRr04kLbVn52mNbPHDmydyVIHq xuMVQnAQ9UipGEKY91gk6vOR0u0Jct0XNaL7I7DyBlNaORgSKXDf0r0nLFVnuk41Zqql 2bcEr1NK0YVdLL69V81RRqfgJBvNBC9EmJAkCaZhqwc5Ky5nmKiJAjvY7z2ZGVVUH87F 36bQ== 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=G0AgtVhRiXtYv7GiuMfsQdi40RXSl8uWCB+fvVpYccA=; b=owoy/5xdGBjyTx8dqWndGoXtt6jItIikz0G/4oyRbHm3Yg15XkmeiQ+9GJOlCX6uGL dkA+Z+pax22i/JDUeTpGDBZCF7gYQD+1/wYvgZPNiRgVXY/XnsxhVDH0cjMdYV1td64t 3TW0SLJMJ4/TM7WCu5Gyk7kNG1Dp6iTmPDQHxIh5AwdnU5VzTvE5vN4yyvMgGcWdz0Mz CM+jiJb6ibCmjJ4kAFz0+a991E/pH7ImdqcYK/0qYW3ZdvF0ubDhI2hodO7LpU8zvZGr VYHsgtE8Ua9xF47w7X0N/wIiKdPO8W+qoO7ZzOUU3EPxeyIY1cElNwylZy+wn99CwzSn R+BA== X-Gm-Message-State: AOAM533EXtyRTGwCc/CQcLVHGflRE6huWR/+KXI7+eCzG+1KZD2ydfzE sNxeXUbVM1DvzHvnNid+kaUzzml+Kr4vbw== X-Google-Smtp-Source: ABdhPJy2ZlNe0QXyg8lusmiLqXJv9/sCP0ZfJQi5MZebu8tCM9hI92/rUhzo9Wes5Th3MyxVcEuV+w== X-Received: by 2002:a17:90b:1191:: with SMTP id gk17mr6567205pjb.225.1589359501095; Wed, 13 May 2020 01:45:01 -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 o21sm14645570pjr.37.2020.05.13.01.44.57 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 13 May 2020 01:45:00 -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 V5 05/15] KVM: MIPS: Use lddir/ldpte instructions to lookup gpa_mm.pgd Date: Wed, 13 May 2020 16:42:36 +0800 Message-Id: <1589359366-1669-6-git-send-email-chenhc@lemote.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1589359366-1669-1-git-send-email-chenhc@lemote.com> References: <1589359366-1669-1-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 Loongson-3 can use lddir/ldpte instuctions to accelerate page table walking, so use them to lookup gpa_mm.pgd. Reviewed-by: Aleksandar Markovic Signed-off-by: Huacai Chen Co-developed-by: Jiaxun Yang --- arch/mips/kvm/entry.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/mips/kvm/entry.c b/arch/mips/kvm/entry.c index 16e1c93..fd71694 100644 --- a/arch/mips/kvm/entry.c +++ b/arch/mips/kvm/entry.c @@ -56,6 +56,7 @@ #define C0_BADVADDR 8, 0 #define C0_BADINSTR 8, 1 #define C0_BADINSTRP 8, 2 +#define C0_PGD 9, 7 #define C0_ENTRYHI 10, 0 #define C0_GUESTCTL1 10, 4 #define C0_STATUS 12, 0 @@ -307,7 +308,10 @@ static void *kvm_mips_build_enter_guest(void *addr) #ifdef CONFIG_KVM_MIPS_VZ /* Save normal linux process pgd (VZ guarantees pgd_reg is set) */ - UASM_i_MFC0(&p, K0, c0_kscratch(), pgd_reg); + if (cpu_has_ldpte) + UASM_i_MFC0(&p, K0, C0_PWBASE); + else + UASM_i_MFC0(&p, K0, c0_kscratch(), pgd_reg); UASM_i_SW(&p, K0, offsetof(struct kvm_vcpu_arch, host_pgd), K1); /* @@ -469,8 +473,10 @@ void *kvm_mips_build_tlb_refill_exception(void *addr, void *handler) u32 *p = addr; struct uasm_label labels[2]; struct uasm_reloc relocs[2]; +#ifndef CONFIG_CPU_LOONGSON64 struct uasm_label *l = labels; struct uasm_reloc *r = relocs; +#endif memset(labels, 0, sizeof(labels)); memset(relocs, 0, sizeof(relocs)); @@ -490,6 +496,16 @@ void *kvm_mips_build_tlb_refill_exception(void *addr, void *handler) */ preempt_disable(); +#ifdef CONFIG_CPU_LOONGSON64 + UASM_i_MFC0(&p, K1, C0_PGD); + uasm_i_lddir(&p, K0, K1, 3); /* global page dir */ +#ifndef __PAGETABLE_PMD_FOLDED + uasm_i_lddir(&p, K1, K0, 1); /* middle page dir */ +#endif + uasm_i_ldpte(&p, K1, 0); /* even */ + uasm_i_ldpte(&p, K1, 1); /* odd */ + uasm_i_tlbwr(&p); +#else /* * Now for the actual refill bit. A lot of this can be common with the * Linux TLB refill handler, however we don't need to handle so many @@ -512,6 +528,7 @@ void *kvm_mips_build_tlb_refill_exception(void *addr, void *handler) build_get_ptep(&p, K0, K1); build_update_entries(&p, K0, K1); build_tlb_write_entry(&p, &l, &r, tlb_random); +#endif preempt_enable(); -- 2.7.0