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SDMA MQD memory type is NC that causes MQD data overwritten accidentally by an old stable cache line. Changing it to UC default for GART will fix the issue. The mqd_gfx9 parameter is meant for control stacks that are allocated together with user mode queue MQDs. Setting mqd_gfx9 to true maps the control stack pages as NC. Here it was accidentally applied to SDMA MQDs, which are allocated together with the HIQ MQD. Setting the mqd_gfx9 to false avoids that. Signed-off-by: Eric Huang <jinhuieric.huang@amd.com> Acked-by: Yong Zhao <Yong.Zhao@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.