From patchwork Mon Oct 9 17:07:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 1845408 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=hNJ0Rg6K; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4S458x1hMGz1yqP for ; Tue, 10 Oct 2023 04:08:48 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qptjj-0000yR-Rh; Mon, 09 Oct 2023 13:08:07 -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 1qptji-0000x2-Oq for qemu-devel@nongnu.org; Mon, 09 Oct 2023 13:08:06 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qptjh-00006H-9r for qemu-devel@nongnu.org; Mon, 09 Oct 2023 13:08:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1696871284; 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=D0nzdaq5F7I7mzK6PuH7vPLW0ZAhdiXYk3OzT+ohu+A=; b=hNJ0Rg6KJOq5lzxP2oC52CYEc94LNBbOQ3MT9fZtc6l0LiqrpiUuHzwEa+ba3tWfy43zY0 z780KV6yp/7FSAIIx7nDClahvBtsjqdRFvlx84U0fHisPoPj8urKeI7JkZCqTVhnIHewcP d5Qjrj9ts+Bs32BAQdTIhHPOwskAgtI= 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-132-om2hdzaSN1q165CNoa36Jw-1; Mon, 09 Oct 2023 13:07:48 -0400 X-MC-Unique: om2hdzaSN1q165CNoa36Jw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (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 9CF48185A79B; Mon, 9 Oct 2023 17:07:47 +0000 (UTC) Received: from thuth-p1g4.redhat.com (unknown [10.39.193.172]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6F9BC40C6EBF; Mon, 9 Oct 2023 17:07:46 +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?= =?utf-8?q?=C3=A9dric_Le_Goater?= Subject: [PATCH v2 0/2] target/s390x/kvm: Simplify the synchronization code Date: Mon, 9 Oct 2023 19:07:43 +0200 Message-ID: <20231009170745.63446-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.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. 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 | 120 ++++++++++++----------------------------- 1 file changed, 33 insertions(+), 87 deletions(-)