In the Hyper-V drivers we need to allocate buffers shared between the
host and guest. This memory has been allocated with bus_dma, however
it doesn't use this correctly, e.g. it is missing calls to
bus_dmamap_sync. Along with this on arm64 we need this memory to be
mapped with the correct memory type that bus_dma may not use.
Switch to contigmalloc to allocate this memory as this will correctly
allocate cacheable memory.
Reviewed by: Souradeep Chakrabarti <schakrabarti@microsoft.com>
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D40227
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.
Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix
Refactor the code to put split the MSR values for x86 and arm64
Hyper-V. Code not yet built. This is one of several patches for
the arm64 Hyper-V enablement.
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D37103
