[Intel-gfx] [RFC 00/13] drm/i915/svm: Add SVM support

[Niranjan Vishwanathapura]

On Tue, Nov 26, 2019 at 04:03:21PM +0200, Joonas Lahtinen wrote:
>Quoting Niranjana Vishwanathapura (2019-11-22 22:57:21)
>> Shared Virtual Memory (SVM) allows the programmer to use a single virtual
>> address space which will be shared between threads executing on CPUs and GPUs.
>> It abstracts away from the user the location of the backing memory, and hence
>> simplifies the user programming model.
>> SVM supports two types of virtual memory allocation methods.
>> Runtime allocator requires the driver to provide memory allocation and
>> management interface, like buffer object (BO) interface.
>> Whereas system allocator makes use of default OS memory allocation and
>> management support like malloc().
>>
>> This patch series adds both SVM system and runtime allocator support
>> to i915 driver.
>>
>> The patch series includes
>>  - SVM support for both system and runtime allocation.
>>  - Plugin in device memory with the Linux kernel.
>>  - User API advertising SVM capability and configuration by user on per
>>    vm basis.
>>  - User API to bind an address range or a BO with a device page table.
>>  - User API to migrate an address range to device memory.
>>  - Implicit migration by moving pages or BOs back from device to host
>>    memory upon CPU access.
>>  - CPU copy and blitter copy support for migrating the pages/BOs.
>>  - Large page mapping support
>>  - Page table dump support.
>
>Link to the IGTs, any selftests?
>Link to userspace changes?

I have some IGT tests, I will post them soon.

Niranjana

>
>Regards, Joonas