From patchwork Tue Oct 20 20:02:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 302435 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=-9.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 7B97EC388F2 for ; Tue, 20 Oct 2020 20:05:17 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C163E221FC for ; Tue, 20 Oct 2020 20:05:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="aI7AX5Jd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C163E221FC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44894 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kUxsh-0006Rn-Pq for qemu-devel@archiver.kernel.org; Tue, 20 Oct 2020 16:05:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48344) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kUxqR-0003YR-CU for qemu-devel@nongnu.org; Tue, 20 Oct 2020 16:02:55 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:34396) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kUxqL-0004G2-J3 for qemu-devel@nongnu.org; Tue, 20 Oct 2020 16:02:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1603224168; 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: in-reply-to:in-reply-to:references:references; bh=o08DNo5e5jAeBXuwFqAA5lYsE+lRvqRwQWzOzIslqx4=; b=aI7AX5JdGTKBK6QUiADFLn/Jqc0iJVxGtmpkDG5nnuqGE3rIU9KW4aApWS8a0UZsJLdp95 UrC6wFjHpAKK5yhJH5ylGhmexrrT/N8BwV0TWalGhz4PVi3WyxAlCu4/Ja8zTfM9vbjN6s vrIaVGbo626rJJ7n2J9A+O5BGj3cYmM= 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-240-Pk6ZBXx7Pu6PIzNWSpD9ew-1; Tue, 20 Oct 2020 16:02:47 -0400 X-MC-Unique: Pk6ZBXx7Pu6PIzNWSpD9ew-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DE7C064082; Tue, 20 Oct 2020 20:02:45 +0000 (UTC) Received: from scv.redhat.com (ovpn-115-172.rdu2.redhat.com [10.10.115.172]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2B7671002C0C; Tue, 20 Oct 2020 20:02:45 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH 2/3] ide: perform SRST as early as possible Date: Tue, 20 Oct 2020 16:02:41 -0400 Message-Id: <20201020200242.1497705-3-jsnow@redhat.com> In-Reply-To: <20201020200242.1497705-1-jsnow@redhat.com> References: <20201020200242.1497705-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/20 01:15:43 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_H5=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: John Snow , Mark Cave-Ayland , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?b?w6k=?= , qemu-block@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We don't need to wait for the falling edge. We can set BSY as soon as possible and begin immediately resetting the drive. Devices don't appear to need to take any specific action on the falling edge. Signed-off-by: John Snow --- hw/ide/core.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/hw/ide/core.c b/hw/ide/core.c index 84e887d426..98cea7ad45 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -2280,9 +2280,7 @@ void ide_ctrl_write(void *opaque, uint32_t addr, uint32_t val) /* Device0 and Device1 each have their own control register, * but QEMU models it as just one register in the controller. */ - if ((bus->cmd & IDE_CTRL_RESET) && - !(val & IDE_CTRL_RESET)) { - /* SRST triggers on falling edge */ + if (!(bus->cmd & IDE_CTRL_RESET) && (val & IDE_CTRL_RESET)) { for (i = 0; i < 2; i++) { s = &bus->ifs[i]; s->status |= BUSY_STAT;