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=-6.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 E8C1BC433DF for ; Thu, 14 May 2020 07:46:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C232A206D8 for ; Thu, 14 May 2020 07:46:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HO/94Vz7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725952AbgENHqy (ORCPT ); Thu, 14 May 2020 03:46:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57126 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725886AbgENHqy (ORCPT ); Thu, 14 May 2020 03:46:54 -0400 Received: from mail-wr1-x441.google.com (mail-wr1-x441.google.com [IPv6:2a00:1450:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B8A9DC061A0C; Thu, 14 May 2020 00:46:53 -0700 (PDT) Received: by mail-wr1-x441.google.com with SMTP id 50so2525098wrc.11; Thu, 14 May 2020 00:46:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=tnd5gyBZ9btP76ArX3oPZn4dZo4wDUjakdTvDBeGETY=; b=HO/94Vz7T2TIY9RkH/u2EWXDgx59uk8EB72AM1s6M1B3xvvtnwHNvvChnovJ2GyJ7H tExXTE0oQl3+SNaEuGL33VrHofRYn3gA1Ire8FwL97xeK/hd7X7SC/aWYtawkGzsvE83 tbdzkBs1EHXc1uBmRuK+ZxzR98Vemw5vaCTelzs7QPUZtr53kUdCkBnIRw/fDIdPVZMh iSAicC2wj2TmgSQeyhPJeaFBNlxMlcFzVI611CgYwe/h0aayear1TveXlbClCJsAQBe+ IIB1OdmvFoulxy7WE75W09d1fUU9r5qcwxd5XnZWHp985tPl7pm6v58LE1gLS9GD9hSJ Iptg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=tnd5gyBZ9btP76ArX3oPZn4dZo4wDUjakdTvDBeGETY=; b=bzwMV+FTEnzmMshvexBiBAtR6j5mWZu5rWEiUC2iPN3Y08BNaJ6IiWZO+zwRhCnbdL 3xx0mRuCFLHEs6OhrfJOxbKpv7jW1ONfvuQNDFfx/fBqLTDXLKscM1InjRNb3S18dNMz dW3QFppbyr/2Haibp5/m/eDHkLybATsz6EcTKHCgmKg+YXYOd5o7HZgvvoouCb76Aq9+ YOypuqp23/Z1Ft8qwgSezr57m/Y11EdqQIQEfB2K1AVeeGJVqwvz+1iEqav5tquZoZUd cX9nMbySQl9HFRwaEosY1S2pCbumXxd2A77rffPaQys/mHbBXrS8k2FkNYX7E+GCrx0H FFJg== X-Gm-Message-State: AOAM533iZvwiREDe4D3Z5OHc2Y+U4j+PCWtdj5duk70ffEIMoctJxBVE Nqviluq8T+r0WgLO9qqE7vdIyMn5AbQs3F+cGTk= X-Google-Smtp-Source: ABdhPJyL0ocZWzSrFbdfvJdVqXshBzbvQF5ntcAt2V2dzVIB06b9qQUw4+w6MkW0XWfYARdB0eDDvtevnroR2Yc5eEY= X-Received: by 2002:a5d:4e41:: with SMTP id r1mr2785707wrt.420.1589442412484; Thu, 14 May 2020 00:46:52 -0700 (PDT) MIME-Version: 1.0 References: <1589359366-1669-1-git-send-email-chenhc@lemote.com> <1589359366-1669-15-git-send-email-chenhc@lemote.com> In-Reply-To: <1589359366-1669-15-git-send-email-chenhc@lemote.com> From: Aleksandar Markovic Date: Thu, 14 May 2020 09:46:39 +0200 Message-ID: Subject: Re: [PATCH V5 14/15] KVM: MIPS: Enable KVM support for Loongson-3 To: Huacai Chen Cc: Paolo Bonzini , Thomas Bogendoerfer , kvm@vger.kernel.org, linux-mips@vger.kernel.org, Fuxin Zhang , Huacai Chen , Jiaxun Yang Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org =D1=81=D1=80=D0=B5, 13. =D0=BC=D0=B0=D1=98 2020. =D1=83 10:48 Huacai Chen <= chenhc@lemote.com> =D1=98=D0=B5 =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BE/= =D0=BB=D0=B0: > > This patch enable KVM support for Loongson-3 by selecting HAVE_KVM, but > only enable KVM/VZ on Loongson-3A R4+ (because VZ of early processors > are incomplete). Besides, Loongson-3 support SMP guests, so we clear the > linked load bit of LLAddr in kvm_vz_vcpu_load() if the guest has more > than one VCPUs. > > Signed-off-by: Huacai Chen > Co-developed-by: Jiaxun Yang > --- Reviewed-by: Aleksandar Markovic > arch/mips/Kconfig | 1 + > arch/mips/kernel/cpu-probe.c | 1 + > arch/mips/kvm/vz.c | 2 +- > 3 files changed, 3 insertions(+), 1 deletion(-) > > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > index ce1aacc..3a15f2b 100644 > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -1405,6 +1405,7 @@ config CPU_LOONGSON64 > select MIPS_L1_CACHE_SHIFT_6 > select GPIOLIB > select SWIOTLB > + select HAVE_KVM > help > The Loongson GSx64(GS264/GS464/GS464E/GS464V) series of p= rocessor > cores implements the MIPS64R2 instruction set with many e= xtensions, > diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c > index 319c250..415fbd2 100644 > --- a/arch/mips/kernel/cpu-probe.c > +++ b/arch/mips/kernel/cpu-probe.c > @@ -2008,6 +2008,7 @@ static inline void cpu_probe_loongson(struct cpuinf= o_mips *c, unsigned int cpu) > c->writecombine =3D _CACHE_UNCACHED_ACCELERATED; > c->ases |=3D (MIPS_ASE_LOONGSON_MMI | MIPS_ASE_LOONGSON_C= AM | > MIPS_ASE_LOONGSON_EXT | MIPS_ASE_LOONGSON_EXT2); > + c->ases &=3D ~MIPS_ASE_VZ; /* VZ of Loongson-3A2000/3000 = is incomplete */ > break; > case PRID_IMP_LOONGSON_64G: > c->cputype =3D CPU_LOONGSON64; > diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c > index 73701c3..dc753d0 100644 > --- a/arch/mips/kvm/vz.c > +++ b/arch/mips/kvm/vz.c > @@ -2697,7 +2697,7 @@ static int kvm_vz_vcpu_load(struct kvm_vcpu *vcpu, = int cpu) > * prevents a SC on the next VCPU from succeeding by matching a L= L on > * the previous VCPU. > */ > - if (cpu_guest_has_rw_llb) > + if (vcpu->kvm->created_vcpus > 1) > write_gc0_lladdr(0); > > return 0; > -- > 2.7.0 >