From patchwork Tue May 4 14:39:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 12238161 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=-11.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 BFA4AC433ED for ; Tue, 4 May 2021 14:40:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 90F39613B3 for ; Tue, 4 May 2021 14:40:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231410AbhEDOlW (ORCPT ); Tue, 4 May 2021 10:41:22 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:55973 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231336AbhEDOlW (ORCPT ); Tue, 4 May 2021 10:41:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620139227; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=kY1X0Ob5QnrkMKpSaPxZa/1lEOOAKUMTFQRU2EjHhsk=; b=G2a6YiYRdlKOwmDSQwYRg+MZwA64X8T8XotTQ3Mfkm4LQ77pJ3cytWNMD/cteH0LCX4xZt myDTAOz851x1UaTU4TdVqS1pw1bycS/UYXb/Lm8lEy0GnKFYQ/Lc4bolrPqydZC/mc1D4k tpJFW2jhTZVzNtePkqSpPYlzidGhxPs= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-319-89l2iu_RNkaN05qwuDjWFg-1; Tue, 04 May 2021 10:40:25 -0400 X-MC-Unique: 89l2iu_RNkaN05qwuDjWFg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4D9F6824FAE; Tue, 4 May 2021 14:40:23 +0000 (UTC) Received: from localhost.localdomain (unknown [10.40.193.27]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8141F5D9DE; Tue, 4 May 2021 14:39:38 +0000 (UTC) From: Maxim Levitsky To: kvm@vger.kernel.org Cc: Borislav Petkov , Paolo Bonzini , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), Wanpeng Li , Jim Mattson , "H. Peter Anvin" , Ingo Molnar , Thomas Gleixner , linux-kernel@vger.kernel.org, Cathy Avery , Sean Christopherson , Vitaly Kuznetsov , Joerg Roedel , Maxim Levitsky Subject: [PATCH v2 0/2] KVM: nSVM: few fixes for the nested migration Date: Tue, 4 May 2021 17:39:34 +0300 Message-Id: <20210504143936.1644378-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Those are few fixes for issues I uncovered by doing variants of a synthetic migration test I just created: I modified the qemu, such that on each vm pause/resume cycle, just prior to resuming a vCPU, qemu reads its KVM state, then (optionaly) resets this state by uploading a dummy reset state to KVM, and then it uploads back to KVM, the state that this vCPU had before. V2: those are only last 2 patches from V1, updated with review feedback from Paolo (Thanks!). Best regards, Maxim Levitsky Maxim Levitsky (2): KVM: nSVM: always restore the L1's GIF on migration KVM: nSVM: remove a warning about vmcb01 VM exit reason arch/x86/kvm/svm/nested.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)