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Guest i915 full ppgtt functionality was blocking by an issue, which would lead to gpu hardware hang. Guest i915 driver may update the ppgtt table just before this workload is going to be submitted to the hardware by device model. This case wasn't handled well by device model before, due to the small time window between removing old ppgtt entry and adding the new one. Errors occur when the workload is executed by hardware during that small time window. This patch is to remove this time window by adding the new ppgtt entry first and then remove the old one. Changes in v2: - Move VGT_CAPS_FULL_PPGTT introduction to patch 2/4. (Joonas) Changes since v2: - Divide the whole patch set into two separate patch series, with one patch in i915 side to check guest i915 full ppgtt capability and enable it when this capability is supported by the device model, and the other one in gvt side which fixs the blocking issue and enables the device model to provide the capability to guest. And this patch focuses on gvt side. (Joonas) - Change the title from "reorder the shadow ppgtt update process by adding entry first" to "Fix guest i915 full ppgtt blocking issue". (Tina) Changes since v3: - Rebase to the latest branch. Changes since v4: - Tested by Tina Zhang. Changes since v5: - Rebase to the latest branch. v6: - Update full 48bit ppgtt definition Cc: Tina Zhang <tina.zhang@intel.com> Signed-off-by: Tina Zhang <tina.zhang@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.