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9dfb8e5b91
The current context logic only updates the descriptor of context when it's being pinned to graphics memory space. But this cannot satisfy the requirement of shadow context. The addressing mode of the pinned shadow context descriptor may be changed according to the guest addressing mode. And this won't be updated, as the already pinned shadow context has no chance to update its descriptor. And this will lead to GPU hang issue, as shadow context is used with wrong descriptor. This patch fixes this issue by letting the pinned shadow context descriptor update its addressing mode on demand. This patch fixes GPU HANG issue which happends after changing the grub parameter i915.enable_ppgtt form 0x01 to 0x03 or vice versa and then rebooting the guest. Signed-off-by: Tina Zhang <tina.zhang@intel.com> Signed-off-by: Kechen Lu <kechen.lu@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> |
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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.