From patchwork Thu Jul 7 03:11:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lev Kujawski X-Patchwork-Id: 12909020 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 1128CC433EF for ; Thu, 7 Jul 2022 03:16:30 +0000 (UTC) Received: from localhost ([::1]:45838 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o9I0D-0001dS-66 for qemu-devel@archiver.kernel.org; Wed, 06 Jul 2022 23:16:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54920) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o9Hvo-0003tt-NX; Wed, 06 Jul 2022 23:11:56 -0400 Received: from mout-u-204.mailbox.org ([80.241.59.204]:43386) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_CHACHA20_POLY1305:256) (Exim 4.90_1) (envelope-from ) id 1o9Hvn-0007bz-9j; Wed, 06 Jul 2022 23:11:56 -0400 Received: from smtp102.mailbox.org (smtp102.mailbox.org [10.196.197.102]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-u-204.mailbox.org (Postfix) with ESMTPS id 4LdhK24WcGz9sQr; Thu, 7 Jul 2022 05:11:50 +0200 (CEST) From: Lev Kujawski To: qemu-devel@nongnu.org Cc: Paolo Bonzini , qemu-block@nongnu.org, Laurent Vivier , Thomas Huth , John Snow , Lev Kujawski Subject: [PATCH v2 3/7] hw/ide/core: Clear LBA and drive bits for EXECUTE DEVICE DIAGNOSTIC Date: Thu, 7 Jul 2022 03:11:36 +0000 Message-Id: <20220707031140.158958-3-lkujaw@member.fsf.org> In-Reply-To: <20220707031140.158958-1-lkujaw@member.fsf.org> References: <20220707031140.158958-1-lkujaw@member.fsf.org> MIME-Version: 1.0 Received-SPF: pass client-ip=80.241.59.204; envelope-from=lkujaw@member.fsf.org; helo=mout-u-204.mailbox.org X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Prior to this patch, cmd_exec_dev_diagnostic relied upon ide_set_signature to clear the device register. While the preservation of the drive bit by ide_set_signature is necessary for the DEVICE RESET, IDENTIFY DEVICE, and READ SECTOR commands, ATA/ATAPI-6 specifies that "DEV shall be cleared to zero" for EXECUTE DEVICE DIAGNOSTIC. This deviation was uncovered by the ATACT Device Testing Program written by Hale Landis. Signed-off-by: Lev Kujawski --- hw/ide/core.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/ide/core.c b/hw/ide/core.c index 7cbc0a54a7..b747191ebf 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -1704,8 +1704,14 @@ static bool cmd_identify_packet(IDEState *s, uint8_t cmd) return false; } +/* EXECUTE DEVICE DIAGNOSTIC */ static bool cmd_exec_dev_diagnostic(IDEState *s, uint8_t cmd) { + /* + * Clear the device register per the ATA (v6) specification, + * because ide_set_signature does not clear LBA or drive bits. + */ + s->select = (ATA_DEV_ALWAYS_ON); ide_set_signature(s); if (s->drive_kind == IDE_CD) {