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Received: from sonic.gate.mail.ne1.yahoo.com by sonic310.consmr.mail.gq1.yahoo.com with HTTP; Mon, 22 Jun 2020 15:30:11 +0000 Received: by smtp418.mail.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 402ae077068331dedde2e55d9ced12f3; Mon, 22 Jun 2020 15:30:08 +0000 (UTC) Date: Mon, 22 Jun 2020 11:30:04 -0400 From: "Alex Xu (Hello71)" Subject: Re: AMD IOMMU + SME + amdgpu regression To: Joerg Roedel Cc: Andy Gross , Lu Baolu , Bjorn Andersson , Daniel Drake , David Woodhouse , Gerald Schaefer , Christoph Hellwig , Heiko Stuebner , Jean-Philippe Brucker , jonathan.derrick@intel.com, Jonathan Hunter , Joerg Roedel , Kukjin Kim , Krzysztof Kozlowski , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, Matthias Brugger , Marek Szyprowski , David Rientjes , Rob Clark , Robin Murphy , Thierry Reding , virtualization@lists.linux-foundation.org, Will Deacon References: <1591915710.rakbpzst8h.none.ref@localhost> <1591915710.rakbpzst8h.none@localhost> <20200622100257.GD31822@suse.de> In-Reply-To: <20200622100257.GD31822@suse.de> MIME-Version: 1.0 Message-Id: <1592839701.mxvvths2x9.none@localhost> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailer: WebService/1.1.16138 hermes_yahoo Apache-HttpAsyncClient/4.1.4 (Java/11.0.7) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Excerpts from Joerg Roedel's message of June 22, 2020 6:02 am: > Hi Alex, >=20 > On Thu, Jun 11, 2020 at 07:05:21PM -0400, Alex Xu (Hello71) wrote: >> I am using an ASRock B450 Pro4 with Ryzen 1600 and ASUS RX 480. I don't=20 >> understand this code at all, but let me know what I can do to=20 >> troubleshoot. >=20 > Does it boot without SME enabled? >=20 >=20 > Regards, >=20 > Joerg >=20 Yes, it works with SME off with dbed452a078 ("dma-pool: decouple=20 DMA_REMAP from DMA_COHERENT_POOL") applied.