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[98.179.76.75]) by smtp.gmail.com with ESMTPSA id j9sm12285498pfc.175.2020.09.21.11.56.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Sep 2020 11:56:44 -0700 (PDT) User-agent: mu4e 1.4.10; emacs 27.1 From: Jerry Snitselaar To: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Joerg Roedel , Adrian Huang , Suravee Suthikulpanit Subject: kdump boot failing with IVRS checksum failure Date: Mon, 21 Sep 2020 11:56:42 -0700 Message-ID: <87o8lzvtzp.fsf@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Joerg, We are seeing a kdump kernel boot failure in test on an HP DL325 Gen10 and it was tracked down to 387caf0b759a ("iommu/amd: Treat per-device exclusion ranges as r/w unity-mapped regions"). Reproduced on 5.9-rc5 and goes away with revert of the commit. There is a follow on commit that depends on this that was reverted as well 2ca6b6dc8512 ("iommu/amd: Remove unused variable"). I'm working on getting system access and want to see what the IVRS table looks like, but thought I'd give you heads up. Regards, Jerry