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Iglesias" , Kevin Wolf , Francisco Iglesias , Subject: [PATCH v2] xlnx-versal-ospi: disable reentrancy detection for iomem_dac Date: Mon, 19 Feb 2024 10:56:37 +0000 Message-ID: <20240219105637.65052-1-sai.pavan.boddu@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00001CEA:EE_|SN7PR12MB7980:EE_ X-MS-Office365-Filtering-Correlation-Id: b3e890a0-1288-42d2-28fe-08dc31397b8b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: Ea/OIU7PlpGTvIggnKtK3FlUd0KX/ZfE1nCaK/I2cTLuwt0AdYhuNYgrhbmOQmCY6RKMrdhzwGlOOOgKJ/Ygl07Kqh77N/zAVLZxNEPECbJLe3yGrcme7P/+HefXW4NBCY3sQXQD3+mHp6mcE65JBXErdYjeQ0qENwB4wq7MCCllsygZY+LgLHwAXNJjhMgsi51aDz2SoFQkmLWOjI8pSPEA7qbG5hJHsNC8AsIyBss+y00vNljp52YmDcwJUTwfpOWGdoLaCwSUosjjUYOXLmpgKrr5Ym3Sdj8bR3bft1KQ73E6ubSDc+T2/gnbL8SR2ntikaKJFSOl/cqFXammNV3iHbMxoIrQBh8eQB0/96T7ecL7bdzmRVCATtvXTSaahefN3TPbCYt0r9FParLs/9MWUxE1vBYXxFFT2JgI9gvc6zxsnkH6r3KRZ+EzOs29di0Ii1R9+734a1XXL/5GrtvTywUNqa+Xa8ME5mF32KboU9b8oY62Ex3Wvp9Jw2aeRZlEe/l94SvP9wJL1Ru7LZ+yji3GSpvpOaJdnBlyFK81yMVg5ERz035kzdcgI2WIvB1ZhWvVO6/jt/QYPniNNGOPYuv0kfd0Zf9EqqenXgJ86nMlp8K3ckgHcAJ8JbkQbpqVEO/94Bx80+gcq7UIu8ltaOshvnS259aGG7dE7tI= X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB03.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(36860700004)(40470700004)(46966006); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Feb 2024 10:56:53.4132 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b3e890a0-1288-42d2-28fe-08dc31397b8b X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CEA.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7980 Received-SPF: softfail client-ip=2a01:111:f403:2417::601; envelope-from=sai.pavan.boddu@amd.com; helo=NAM12-DM6-obe.outbound.protection.outlook.com X-Spam_score_int: 3 X-Spam_score: 0.3 X-Spam_bar: / X-Spam_report: (0.3 / 5.0 requ) AC_FROM_MANY_DOTS=2.5, BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.077, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1708340262293100001 Content-Type: text/plain; charset="utf-8" The OSPI DMA reads flash data through the OSPI linear address space (the iomem_dac region), because of this the reentrancy guard introduced in commit a2e1753b ("memory: prevent dma-reentracy issues") is disabled for the memory region. Signed-off-by: Sai Pavan Boddu --- Changes for V2: Added code comments. hw/ssi/xlnx-versal-ospi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/ssi/xlnx-versal-ospi.c b/hw/ssi/xlnx-versal-ospi.c index c7b95b1f37..c479138ec1 100644 --- a/hw/ssi/xlnx-versal-ospi.c +++ b/hw/ssi/xlnx-versal-ospi.c @@ -1772,6 +1772,12 @@ static void xlnx_versal_ospi_init(Object *obj) memory_region_init_io(&s->iomem_dac, obj, &ospi_dac_ops, s, TYPE_XILINX_VERSAL_OSPI "-dac", 0x20000000); sysbus_init_mmio(sbd, &s->iomem_dac); + /* + * The OSPI DMA reads flash data through the OSPI linear address space= (the + * iomem_dac region), because of this the reentrancy guard needs to be + * disabled. + */ + s->iomem_dac.disable_reentrancy_guard =3D true; =20 sysbus_init_irq(sbd, &s->irq); =20 --=20 2.25.1