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f6c466b84c
For now, we will only allow async migration when TTM is used, so the paths we care about are related to TTM. The mmap path is handled by having the fence in ttm_bo->moving, when pinning, the binding only becomes available after the moving fence is signaled, and pinning a cpu map will only work after the moving fence signals. This should close all holes where userspace can read a buffer before it's fully migrated. v2: - Fix a couple of SPARSE warnings v3: - Fix a NULL pointer dereference v4: - Ditch the moving fence waiting for i915_vma_pin_iomap() and replace with a verification that the vma is already bound. (Matthew Auld) - Squash with a previous patch introducing moving fence waiting and accessing interfaces (Matthew Auld) - Rename to indicated that we also add support for sync waiting. v5: - Fix check for NULL and unreferencing i915_vma_verify_bind_complete() (Matthew Auld) - Fix compilation failure if !CONFIG_DRM_I915_DEBUG_GEM - Fix include ordering. (Matthew Auld) v7: - Fix yet another compilation failure with clang if !CONFIG_DRM_I915_DEBUG_GEM Co-developed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211122214554.371864-2-thomas.hellstrom@linux.intel.com |
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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.