From patchwork Thu Sep 14 01:55:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 139783 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:612c:172:b0:3f2:4152:657d with SMTP id h50csp554787vqi; Thu, 14 Sep 2023 11:51:24 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEawfYEL/7Xpg1qvOAm9+w1pbstdyZ9VmiIetokFa5ac//lxUzjmiFGT0bx5PdDWuHqXQTs X-Received: by 2002:a05:6358:290b:b0:134:df5e:4776 with SMTP id y11-20020a056358290b00b00134df5e4776mr7910321rwb.24.1694717484616; Thu, 14 Sep 2023 11:51:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1694717484; cv=none; d=google.com; s=arc-20160816; b=fhCsCgu2AHYYNVKWkjvOcN90irrkE0Uz4Mr4dH394FlDkYYGnQ9KF0nDJY5RXceQJW UIJRLtX73V4kZPSuojEpb519oMo3eQMUVepu7YT50lRtRROVtC/AcM1RX/dYC7uPhnAm J7RCr2YwauskvYOdOeilz8DUlczFG+N5mhNe1kFprbGSn+d46kl47dH8YSxk9iGYvhmq +6VVcIy9ALMCVvfi3/FBWFD3xrIosNiL5IbU2KQiH4cvjsmGXrmqpYKW5kIPmnL0QzpO ycWU5Dw0Vd4L+Re43BzIRiovZ/5x2hxz5jswUTQuAdd68G5lJiAKoJu+qIZygY2y29X9 rLZQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:reply-to:dkim-signature; bh=5olfKKfAgOBEIWorNeGA6oMvbpwHV/k+KeYKQRUdq04=; fh=61hsfVoef5Tbbo+Rm06/Hxsz4fAtyORDF8Po5ZVRZDI=; b=g0gTQJrvMWmIsbaN/sw6Hebu1VuCA7CFfmgM1J54RwmjnmrkoOnMp2IXyzsJfTo/yG GJNlkNIpCsVRJtRTrl5285Q/CgPgFv+/RqapSyGjW0e+r4ItF6/uhud7FuqnN71Dw0g6 GnTo1UHS7ht6mXXSQzUVEf9K/CgFx7N3xfdi3U4bhOCVxjUH5Pe+GVSI6wmvtz3hAmNm JWbgfbkfkv6FKohsaIzwJrJl4QfbK4bUPsSRjw6yT7xe/QHT8uWJBwKafCVRSr04AaLB UsLFKxxZVAZ3vNaGEx8Mqn1USfTWThABGrVkb8SJJfv5ch09/jqvoNqt+uQFXIeOnjTn ZcbA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=bdIMT7k5; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.38 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from fry.vger.email (fry.vger.email. [23.128.96.38]) by mx.google.com with ESMTPS id m1-20020a656a01000000b00577f7b6e7b4si2141231pgu.624.2023.09.14.11.51.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Sep 2023 11:51:24 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.38 as permitted sender) client-ip=23.128.96.38; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=bdIMT7k5; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.38 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by fry.vger.email (Postfix) with ESMTP id CA6E280D2E69; Wed, 13 Sep 2023 19:12:03 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at fry.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233846AbjINCL5 (ORCPT + 35 others); Wed, 13 Sep 2023 22:11:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234147AbjINB4B (ORCPT ); Wed, 13 Sep 2023 21:56:01 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFAD5210A for ; Wed, 13 Sep 2023 18:55:44 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-d81486a0382so565065276.0 for ; Wed, 13 Sep 2023 18:55:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1694656544; x=1695261344; darn=vger.kernel.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=bdIMT7k5UpwL0z+XvScHcf9jpYN5+dVi5xzFu2O9MWIMM32oAqzM4KN8XykaM16YUY YzvZruztiA1/vZf9OVN4agBdyBZdVJTRdZsLki+sc0NJ/iTeGg4HJx7Fz5o4p9z1qrMH sNAU5f5GrWFx3jgKckDFayc2lvRg3R08qo7wl+R40CLvXsPK0E9+KoamWo7PO3XnEmjc jNgIPGBPFoX5C5cWybiYlObLpUam/IHDObmiBrAQsWahbH1j0lv6H5AmJbhXuP6FVAqQ vP/oeOfpaTVLYk9IHWTWHxkne3AuKTv2FkpHSLunQI9BfcDIgV8bYjVSJcTg5zFk3CTb 0yYw== 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=FOBVPqS1zs2O1ELW+2RTvpS0L2QpHZyMXtyFzK69OGREdPINjrA9Ue8jkD7SBLVBfY 3ug6qDuf9qFQZJPv5/vDdJzDq8oSeR9tDOYB6/KIfGwYlgMMrr2pxub6P1ojQukXIrD9 HSeK6wLhYIhP4CxhJ8gOx9RpZfMuRV13XZgxfHcPyqJuUZqCNPHK+O906MkAYyFuj0gM ZhDXsfoXlxasnTW0ytbBM8K3Yz8zR+1c7DxPzb36inY93ZYh0UcPkiFvGG6y6oYSv2Op sujCxxo2M+/GEvRJf0JwEOpaPwqGtvJOIQHWRxIwS62KaQikQOO3wssdnMr1ALvx3wZX o1WQ== X-Gm-Message-State: AOJu0YxthyZKG41a/jdsm25+sPaEY5dIw6GOkNV3zGzbDIxG/PETE9C0 djMEOAwNO2cE6wA7JU/QASrMdhIeEqg= 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) Reply-To: Sean Christopherson 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 To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , "Matthew Wilcox (Oracle)" , Andrew Morton , Paul Moore , James Morris , "Serge E. Hallyn" Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Chao Peng , Fuad Tabba , Jarkko Sakkinen , Anish Moorthy , Yu Zhang , Isaku Yamahata , Xu Yilun , Vlastimil Babka , Vishal Annapurve , Ackerley Tng , Maciej Szmigiero , David Hildenbrand , Quentin Perret , Michael Roth , Wang , Liam Merwick , Isaku Yamahata , "Kirill A . Shutemov" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (fry.vger.email [0.0.0.0]); Wed, 13 Sep 2023 19:12:03 -0700 (PDT) X-Spam-Status: No, score=-8.4 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on fry.vger.email X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777040081529698650 X-GMAIL-MSGID: 1777040081529698650 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 Signed-off-by: Sean Christopherson --- arch/powerpc/kvm/powerpc.c | 4 ---- 1 file changed, 4 deletions(-) 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: