From patchwork Mon Nov 16 18:26:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isaku Yamahata X-Patchwork-Id: 11910411 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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 E835EC2D0A3 for ; Mon, 16 Nov 2020 18:32:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AF4ED207BC for ; Mon, 16 Nov 2020 18:32:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388097AbgKPS2G (ORCPT ); Mon, 16 Nov 2020 13:28:06 -0500 Received: from mga06.intel.com ([134.134.136.31]:20632 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388086AbgKPS2E (ORCPT ); Mon, 16 Nov 2020 13:28:04 -0500 IronPort-SDR: +JsGjOS9Qt2iT8fBSSW0DBTECaxYSi2JPoak/1nKUGvpnAqCkIQfLHamzv15e0IF2R5PWIfXtG JxDnjdTKzRBg== X-IronPort-AV: E=McAfee;i="6000,8403,9807"; a="232410031" X-IronPort-AV: E=Sophos;i="5.77,483,1596524400"; d="scan'208";a="232410031" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Nov 2020 10:28:03 -0800 IronPort-SDR: kmdBeUL4mdS0+jujBwt2ADTN0JowZGlBjbiaErA3r/ls19CNWuswZNlgUfjAmq523RLBg4SlcU 1EbibhERw4fg== X-IronPort-AV: E=Sophos;i="5.77,483,1596524400"; d="scan'208";a="400527986" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Nov 2020 10:28:02 -0800 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 , x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Sean Christopherson Subject: [RFC PATCH 23/67] KVM: Add per-VM flag to disable dirty logging of memslots for TDs Date: Mon, 16 Nov 2020 10:26:08 -0800 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: 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 --- 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 1a0df7b83fd0..9682282cb258 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -517,6 +517,7 @@ struct kvm { pid_t userspace_pid; unsigned int max_halt_poll_ns; + 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 572a66a61c29..aa5f27753756 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1103,7 +1103,10 @@ 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)