rust: drm: gpuvm: add SmContext lifetime bound

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If a DriverGpuVm implementation is lifetime-parameterized, its
SmContext<'ctx> type may depend on lifetimes carried by that driver
implementation. In this case, SmContext<'ctx> is only valid if the
driver implementation outlives 'ctx.

Add a Self: 'ctx bound to DriverGpuVm::SmContext<'ctx> to express that
requirement. Then propagate the corresponding T: 'ctx bound to the GPUVM
state machine helper types that store T::SmContext<'ctx>.

This allows drivers to provide lifetime-parameterized implementations of
DriverGpuVm.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20260610-gpuvm_smcontext_lifetime_bound_v1-v1-1-531e7d2ee7b4@collabora.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

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Boris Brezillon 2026-06-10 17:04:31 -07:00 • committed by Danilo Krummrich

parent 20003c1a1f

commit 5f7410aa26

2 changed files with 5 additions and 3 deletions

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4

rust/kernel/drm/gpuvm/mod.rs

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4

rust/kernel/drm/gpuvm/sm_ops.rs

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