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Wed, 30 Mar 2022 18:21:19 +0000 Received: by kubenode520.mail-prod1.omega.ne1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 3767e03bf643ceaa3a5f31bec6822e45; Wed, 30 Mar 2022 17:51:11 +0000 (UTC) Date: Wed, 30 Mar 2022 13:51:07 -0400 Subject: "dma-mapping: remove CONFIG_DMA_REMAP" causes AMD SME boot fail To: Christoph Hellwig , regressions@lists.linux.dev MIME-Version: 1.0 Message-Id: <1648659326.eabkokyuym.none@localhost> References: <1648659326.eabkokyuym.none.ref@localhost> X-Mailer: WebService/1.1.20001 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo X-Mailman-Approved-At: Wed, 30 Mar 2022 18:22:23 +0000 Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: "Alex Xu \(Hello71\) via iommu" Reply-To: "Alex Xu \(Hello71\)" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi, After a recent kernel update, booting one of my machines causes it to hang on a black screen. Pressing Lock keys on the USB keyboard does not turn on the indicators, and the machine does not appear on the Ethernet network. I don't have a serial port on this machine. I didn't try netconsole, but I suspect it won't work. Setting mem_encrypt=0 seems to resolve the issue. Reverting f5ff79fddf0e ("dma-mapping: remove CONFIG_DMA_REMAP") also appears to resolve the issue. The machine in question has an AMD Ryzen 5 1600 and ASRock B450 Pro4. Cheers, Alex. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu