Message ID | 20230914015531.1419405-5-seanjc@google.com (mailing list archive) |
---|---|
State | Handled Elsewhere |
Headers | show
Return-Path: <linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=axl1EC0J; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=patchwork.ozlabs.org) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RmL95540fz1yh6 for <incoming@patchwork.ozlabs.org>; Thu, 14 Sep 2023 11:59:21 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=axl1EC0J; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4RmL953yFSz3cN1 for <incoming@patchwork.ozlabs.org>; Thu, 14 Sep 2023 11:59:21 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=axl1EC0J; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=flex--seanjc.bounces.google.com (client-ip=2607:f8b0:4864:20::b4a; helo=mail-yb1-xb4a.google.com; envelope-from=3h2gczqykdcgwierngksskpi.gsqpmrybttg-hizpmwxw.sdpefw.svk@flex--seanjc.bounces.google.com; receiver=lists.ozlabs.org) Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4RmL4y382tz3bTn for <linuxppc-dev@lists.ozlabs.org>; Thu, 14 Sep 2023 11:55:46 +1000 (AEST) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-d7fd4c23315so544265276.2 for <linuxppc-dev@lists.ozlabs.org>; Wed, 13 Sep 2023 18:55:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1694656544; x=1695261344; darn=lists.ozlabs.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=5olfKKfAgOBEIWorNeGA6oMvbpwHV/k+KeYKQRUdq04=; b=axl1EC0JTYnMQHtT/MWO7/QkcJGXgGp7lw+Ow/LgG/Z+g62nG1M0TwXetgJv3c3zyA jL4wsV4rK6VbXnawrD9T+9xl/mN3wsGFFOLfqCxDkR1zVKm2BPTpYh6M//pFkhKCGG5I aOHELyN7o7wcn986/UHnNbdUrvebAtvKIqzLI4UOqvpU25csdWGbIq/vWPD659q/k1Bl izb0GSq64rGlZPsNKxFWtwOv+FpUkOuoCmca3sH4P4EFb3Gw5Oy4qdMJJKhv0N9aApRn 1LxN/urzbN5gtsH8ymZ1W87iVuoFx5L5tn84TG3BDEl3DY1TTHprELnZUnLbjR5rsmbL kY4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694656544; x=1695261344; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=5olfKKfAgOBEIWorNeGA6oMvbpwHV/k+KeYKQRUdq04=; b=QsGj/Q1gDLJ2FQp9JCusylZb41J+JbnVqM5JSPXvB5wiFGWmbDhMg73EaSnVP/yndx wodPKenQ/BTy7qaoQzscUqWM3B/nkXFKdS0Ym3Vk81c3cefCf43mIXSmBcGZsnzWMFBF jhYyT+6xVHwLYXzQEi0RWe5zrGdCMrJ1Ae98OcgnyVI0iEJebBQ/F7nWwP4cxdqceWXw 55SjfXJzCwQHeYtZnKj4zA9vSHGbFI+QCRubNuJgb+BfEpr4tTSI+EAwUSsOcTUpV/3f Hy6AWFVdyMU5U/v8flDdoBjq1lAyYrXd141SbyIrw2mRqrkXZBC55rb34gTs580b6Cu5 AeBA== X-Gm-Message-State: AOJu0YzsVFEHA3b4RgTNRLn7ViXkbzjTNvW8pnj2yWJEYmBNLdQLnlBg 5z8SgEzPHWOE3SMPf1OTkh+O3WweZbk= X-Google-Smtp-Source: AGHT+IFAWDIKY3pID0CrDZgtjj2bXptPteu0k42w51y6Ps+oH46knUj2OnzhEQTEbd0IbAu5MzXei5K4JBI= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6902:684:b0:d81:8e4d:b681 with SMTP id i4-20020a056902068400b00d818e4db681mr15248ybt.12.1694656543919; Wed, 13 Sep 2023 18:55:43 -0700 (PDT) Date: Wed, 13 Sep 2023 18:55:02 -0700 In-Reply-To: <20230914015531.1419405-1-seanjc@google.com> Mime-Version: 1.0 References: <20230914015531.1419405-1-seanjc@google.com> X-Mailer: git-send-email 2.42.0.283.g2d96d420d3-goog Message-ID: <20230914015531.1419405-5-seanjc@google.com> Subject: [RFC PATCH v12 04/33] KVM: PPC: Return '1' unconditionally for KVM_CAP_SYNC_MMU From: Sean Christopherson <seanjc@google.com> To: Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>, Oliver Upton <oliver.upton@linux.dev>, Huacai Chen <chenhuacai@kernel.org>, Michael Ellerman <mpe@ellerman.id.au>, Anup Patel <anup@brainfault.org>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Sean Christopherson <seanjc@google.com>, "Matthew Wilcox (Oracle)" <willy@infradead.org>, Andrew Morton <akpm@linux-foundation.org>, Paul Moore <paul@paul-moore.com>, James Morris <jmorris@namei.org>, "Serge E. Hallyn" <serge@hallyn.com> Content-Type: text/plain; charset="UTF-8" X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org> List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe> List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/> List-Post: <mailto:linuxppc-dev@lists.ozlabs.org> List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help> List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe> Reply-To: Sean Christopherson <seanjc@google.com> Cc: kvm@vger.kernel.org, David Hildenbrand <david@redhat.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Chao Peng <chao.p.peng@linux.intel.com>, linux-riscv@lists.infradead.org, Isaku Yamahata <isaku.yamahata@gmail.com>, linux-security-module@vger.kernel.org, Wang <wei.w.wang@intel.com>, Fuad Tabba <tabba@google.com>, linux-arm-kernel@lists.infradead.org, Maciej Szmigiero <mail@maciej.szmigiero.name>, Michael Roth <michael.roth@amd.com>, Ackerley Tng <ackerleytng@google.com>, kvmarm@lists.linux.dev, Vlastimil Babka <vbabka@suse.cz>, Isaku Yamahata <isaku.yamahata@intel.com>, Quentin Perret <qperret@google.com>, linux-mips@vger.kernel.org, Jarkko Sakkinen <jarkko@kernel.org>, Yu Zhang <yu.c.zhang@linux.intel.com>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, kvm-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, Liam Merwick <liam.merwick@oracle.com>, Vishal Annapurve <vannapurve@google.com>, linuxppc-dev@lists.ozlabs.org, Xu Yilun <yilun.xu@intel.com>, Ani sh Moorthy <amoorthy@google.com> Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" <linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org> |
Series |
KVM: guest_memfd() and per-page attributes
|
expand
|
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index b0a512ede764..8d3ec483bc2b 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -635,11 +635,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) #if !defined(CONFIG_MMU_NOTIFIER) || !defined(KVM_ARCH_WANT_MMU_NOTIFIER) BUILD_BUG(); #endif -#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE - r = hv_enabled; -#else r = 1; -#endif break; #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE case KVM_CAP_PPC_HTAB_FD:
Advertise that KVM's MMU is synchronized with the primary MMU for all flavors of PPC KVM support, i.e. advertise that the MMU is synchronized when CONFIG_KVM_BOOK3S_HV_POSSIBLE=y but the VM is not using hypervisor mode (a.k.a. PR VMs). PR VMs, via kvm_unmap_gfn_range_pr(), do the right thing for mmu_notifier invalidation events, and more tellingly, KVM returns '1' for KVM_CAP_SYNC_MMU when CONFIG_KVM_BOOK3S_HV_POSSIBLE=n and CONFIG_KVM_BOOK3S_PR_POSSIBLE=y, i.e. KVM already advertises a synchronized MMU for PR VMs, just not when CONFIG_KVM_BOOK3S_HV_POSSIBLE=y. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sean Christopherson <seanjc@google.com> --- arch/powerpc/kvm/powerpc.c | 4 ---- 1 file changed, 4 deletions(-)