From patchwork Fri Jul 2 22:04:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isaku Yamahata X-Patchwork-Id: 12356625 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 D92B8C07E95 for ; Fri, 2 Jul 2021 22:05:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C73A261443 for ; Fri, 2 Jul 2021 22:05:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233051AbhGBWIN (ORCPT ); Fri, 2 Jul 2021 18:08:13 -0400 Received: from mga12.intel.com ([192.55.52.136]:50200 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230415AbhGBWH6 (ORCPT ); Fri, 2 Jul 2021 18:07:58 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10033"; a="188472735" X-IronPort-AV: E=Sophos;i="5.83,320,1616482800"; d="scan'208";a="188472735" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jul 2021 15:05:24 -0700 X-IronPort-AV: E=Sophos;i="5.83,320,1616482800"; d="scan'208";a="642814766" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jul 2021 15:05:24 -0700 From: isaku.yamahata@intel.com To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Paolo Bonzini , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , erdemaktas@google.com, Connor Kuehl , Sean Christopherson , x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Sean Christopherson , Kai Huang Subject: [RFC PATCH v2 29/69] KVM: Add per-VM flag to disable dirty logging of memslots for TDs Date: Fri, 2 Jul 2021 15:04:35 -0700 Message-Id: <50b17754044ddc84d9bdc1dc0cfbff33158674de.1625186503.git.isaku.yamahata@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Sean Christopherson Add a flag for TDX to mark dirty logging as unsupported. Suggested-by: Kai Huang Signed-off-by: Sean Christopherson Signed-off-by: Isaku Yamahata --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 7ee7104b4b59..74bc55df7a5d 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -597,6 +597,7 @@ struct kvm { unsigned int max_halt_poll_ns; u32 dirty_ring_size; + bool dirty_log_unsupported; #ifdef __KVM_HAVE_READONLY_MEM bool readonly_mem_unsupported; #endif diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 63d0c2833913..8b075b5e7303 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1261,7 +1261,10 @@ static void update_memslots(struct kvm_memslots *slots, static int check_memory_region_flags(struct kvm *kvm, const struct kvm_userspace_memory_region *mem) { - u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES; + u32 valid_flags = 0; + + if (!kvm->dirty_log_unsupported) + valid_flags |= KVM_MEM_LOG_DIRTY_PAGES; #ifdef __KVM_HAVE_READONLY_MEM if (!kvm->readonly_mem_unsupported)