From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5FF5DCD98FC for ; Wed, 11 Oct 2023 08:07:10 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qqUEE-0004uf-9z; Wed, 11 Oct 2023 04:06:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqUE9-0004t9-FW for qemu-devel@nongnu.org; Wed, 11 Oct 2023 04:05:57 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqUE0-0003V0-Rk for qemu-devel@nongnu.org; Wed, 11 Oct 2023 04:05:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697011546; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=9MawazZ8TF47SpkFFQbL/9RMkLPttiDM1qRZRoeC0Bo=; b=LC+DdSTNhhV4G+Kx7A6g5KqFYqAi8Nlp5h9CJxG47yPV6QU7rj2XeL4oFGDEzvzlbFtwTi Y/svMoqL9+5uxhmb5vnBc01OZREImstypnxyyKjzkEMxEQ7X1/FmBZYD60TLpBQfZVh6L7 xytx018rlmKaOl5L9Mnm893sf8llnfs= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-31-V55pnMHcNkC3p5nDs6dXXg-1; Wed, 11 Oct 2023 04:05:40 -0400 X-MC-Unique: V55pnMHcNkC3p5nDs6dXXg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 7AEC4185A78E; Wed, 11 Oct 2023 08:05:40 +0000 (UTC) Received: from thuth-p1g4.redhat.com (unknown [10.39.192.7]) by smtp.corp.redhat.com (Postfix) with ESMTP id 49BB6215670B; Wed, 11 Oct 2023 08:05:39 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org, Halil Pasic , Christian Borntraeger Cc: qemu-s390x@nongnu.org, David Hildenbrand , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PATCH v3 0/2] target/s390x/kvm: Simplify the synchronization code Date: Wed, 11 Oct 2023 10:05:36 +0200 Message-ID: <20231011080538.796999-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org KVM_SYNC_GPRS, KVM_SYNC_ACRS, KVM_SYNC_CRS and KVM_SYNC_PREFIX are available since kernel 3.10. Since we already require at least kernel 3.15 in the s390x KVM code, we can also assume that the KVM_CAP_SYNC_REGS sync code is always possible for these registers, and remove the related checks and fallbacks via KVM_SET_REGS and KVM_GET_REGS. v3: - Don't sync ACRs, CRs and prefix in kvm_arch_put_registers() when using level == KVM_PUT_RUNTIME_STATE - Use g_assert(can_sync_regs(cs, KVM_SYNC_REQUIRED_REGS)) instead of open-coding it. v2: - Split the patch from v1 into two patches - Use a #define KVM_SYNC_REQUIRED_BITS for the required sync bits - Use memcpy() instead of for-loops for copying the registers Thomas Huth (2): target/s390x/kvm: Turn KVM_CAP_SYNC_REGS into a hard requirement target/s390x/kvm: Simplify the GPRs, ACRs, CRs and prefix synchronization code target/s390x/kvm/kvm.c | 124 ++++++++++++----------------------------- 1 file changed, 37 insertions(+), 87 deletions(-) -- 2.41.0