drm/tyr: add GPU virtual memory (VM) support

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Add GPU virtual address space management using the DRM GPUVM framework.
Each virtual memory (VM) space is backed by ARM64 LPAE Stage 1 page tables
and can be mapped into hardware address space (AS) slots for GPU execution.

The implementation provides memory isolation and virtual address
allocation. VMs support mapping GEM buffer objects with configurable
protection flags (readonly, noexec, uncached) and handle both 4KB and 2MB
page sizes. A new_dummy_object() helper is provided to create a dummy GEM
object for use as a GPUVM root.

The vm module integrates with the MMU for address space activation and
provides map/unmap/remap operations with page table synchronization.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Co-developed-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Co-developed-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Link: https://patch.msgid.link/20260728-fw-boot-b4-v10-4-9187aefa3f2f@collabora.com
[aliceryhl: fix integer cast on 32-bit arm]
Signed-off-by: Alice Ryhl <aliceryhl@google.com>

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This commit is contained in:

Boris Brezillon 2026-07-28 11:39:26 -07:00 • committed by Alice Ryhl

parent ae047468e0

commit f2dc32d5a1

6 changed files with 979 additions and 5 deletions

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1

drivers/gpu/drm/tyr/Kconfig

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4

drivers/gpu/drm/tyr/driver.rs

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26

drivers/gpu/drm/tyr/gem.rs

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1

drivers/gpu/drm/tyr/mmu.rs

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1

drivers/gpu/drm/tyr/tyr.rs

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951

drivers/gpu/drm/tyr/vm.rs

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