commit 236abc9c11265a93f9d3c5f911371cc9d9eb99b5
author Lingfeng Yang <lfy@google.com> Fri Dec 21 20:19:33 2018 -0800
committer Lingfeng Yang <lfy@google.com> Sat Dec 22 01:42:55 2018 -0800
tree b41a6d28466ce341edfdecfcf1331f7d494f4469
parent 31754637893cf0d77228d276014d3d07a609b300

[vulkan] host coherent: Integrate VK_GOOGLE_address_space

bug: 111137294
bug: 121377497

This CL replaces the aligned_buf_alloc mechanism with a call to
vkMapMemoryIntoAddressSpaceGOOGLE, which is implemented as follows:

- Use GoldfishAddressSpaceBlock to obtain a reservation of guest physical memory
- Through the encoder, we obtain a host-side gpu pointer
- mmap() method of GoldfishAddressSpaceBlock is used to get a guest
userspace pointer

Change-Id: I643351e2c8cd8528c4f0aa1e9b10166b736aea51