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[2620:137:e000::3:3]) by mx.google.com with ESMTPS id i11-20020a25d10b000000b00da08e7ce4b2si3891931ybg.495.2023.10.27.11.24.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Oct 2023 11:24:17 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) client-ip=2620:137:e000::3:3; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=0U1zSTSj; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 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 lipwig.vger.email (Postfix) with ESMTP id C0A0A802269C; Fri, 27 Oct 2023 11:24:01 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346435AbjJ0SXT (ORCPT + 25 others); Fri, 27 Oct 2023 14:23:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235052AbjJ0SWu (ORCPT ); Fri, 27 Oct 2023 14:22:50 -0400 Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0337D43 for ; Fri, 27 Oct 2023 11:22:37 -0700 (PDT) Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-1caaaa873efso23349725ad.3 for ; Fri, 27 Oct 2023 11:22:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698430957; x=1699035757; 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=srqr8yeDZlFrvxNrVECKE5xxuDvV2cb3J0BOKhehVs4=; b=0U1zSTSjnA3BRqEUsHqQ22gj/v+L0Zoy521THY4PBak+iDWT10zt5AKWMazO6galHQ U9MgstUWrVea2OJPPklBLMEOedu4md8jhyAnAb3fkx1Btm2UvqMz52WOKhIKjerUzFH/ EbIHiAeDlUejd0qX5hJpeOX0Sw//UZLki0+o9owPDvyejNmO+buU3e4WZ2ej2RyolcMb DTKC2FItAczUC+gTOifCKo0+jD2aE4Y5PHzHksb94Vzyayf0HrecBtPy0ALIdRGvtkyk oxZMV2LjEMy3Rvvp4lOLmpdIX0UFyfnD5X6RUhN4zE8mS0mnSVSh24TQ2v8r5fbkipSs 1+OA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698430957; x=1699035757; 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=srqr8yeDZlFrvxNrVECKE5xxuDvV2cb3J0BOKhehVs4=; b=JwKCT8xmdrmpvDWtMoXVWpVbPFouawi1g4l7+Tyu1B5DpZMoCdu8wLAWELLnzG7i0C OKPi1WZZ27g8sb76jbWk/1HXii9VrKQ+We3urMGGMOw8hwUIFR0R3ra6IG0GpIOqTutw 29my3xH2I/mTzTzW/IXA+5dsiiB009eUPGFdJdbJdk+l06EirPQDMBWvBwE/qQs6Ykm0 FZFHn9l3yvQEdabn8dIUYfv6pmK82VhVm55hhnh8ois+X0jtukzXvOT3S5DZMZsxU+3j MvT0YaJP3n5uLT2ZOkISuEVeYd4IyGbc45rtIO7dKKBIKqi62aQtZ76L3ymEo6FD0vp9 zqMg== X-Gm-Message-State: AOJu0Ywl+j2QE2TRhsoDKXYUa+FRnztobSPPgxXjAO7naalGvfPe8Vaa wxA89fq/o3DFTwWD/v2Gg0F++t0+l/w= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:903:446:b0:1ca:2620:78ad with SMTP id iw6-20020a170903044600b001ca262078admr60815plb.8.1698430957451; Fri, 27 Oct 2023 11:22:37 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 27 Oct 2023 11:21:48 -0700 In-Reply-To: <20231027182217.3615211-1-seanjc@google.com> Mime-Version: 1.0 References: <20231027182217.3615211-1-seanjc@google.com> X-Mailer: git-send-email 2.42.0.820.g83a721a137-goog Message-ID: <20231027182217.3615211-7-seanjc@google.com> Subject: [PATCH v13 06/35] 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 , Alexander Viro , Christian Brauner , "Matthew Wilcox (Oracle)" , Andrew Morton 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-kernel@vger.kernel.org, Xiaoyao Li , Xu Yilun , Chao Peng , Fuad Tabba , Jarkko Sakkinen , Anish Moorthy , David Matlack , Yu Zhang , Isaku Yamahata , " =?utf-8?q?Micka=C3=ABl_Sala?= =?utf-8?q?=C3=BCn?= " , Vlastimil Babka , Vishal Annapurve , Ackerley Tng , Maciej Szmigiero , David Hildenbrand , Quentin Perret , Michael Roth , Wang , Liam Merwick , Isaku Yamahata , "Kirill A . Shutemov" 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 lipwig.vger.email 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 (lipwig.vger.email [0.0.0.0]); Fri, 27 Oct 2023 11:24:02 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780934043934949306 X-GMAIL-MSGID: 1780934043934949306 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: