Hey all,

In the current MSHV accelerator code passing CPU features via the -cpu
flag doesn't work as intended yet. When using the MSHV hypervisor we
either silently discard the specified model/features and leave it up
to the hypervisor to provide a sensible set of features or if the user
selects -cpu host, the hypervisor might refuse to create a partition.

This changeset introduces a more comprehensive support for passing
desired guest cpu features to the hypervisor. It's also a prerequisite
for Live Migration support.

Drive-by fixes:

- adding packed attribute to inlined UAPI structs

Changes since v1:

- query hypervisor for supported processor features instead of the host OS
- disable la57 (5 level page tables)

best,

magnus

Magnus Kulke (9):
  accel/mshv: use mshv_create_partition_v2 payload
  target/i386/mshv: fix cpuid propagation bug
  target/i386/mshv: fix various cpuid traversal bugs
  target/i386/mshv: change cpuid mask to UINT32_MAX
  target/i386/mshv: set cpu model name on -cpu host
  target/i386: query mshv accel for supported cpuids
  target/i386/mshv: populate xsave area offsets
  target/i386/mshv: filter out CET bits in cpuid
  accel/mshv: disable la57 (5lvl paging)

 accel/mshv/mshv-all.c          |  82 +++++++++++-
 include/hw/hyperv/hvgdk_mini.h |   2 +
 include/hw/hyperv/hvhdk.h      | 195 ++++++++++++++++++++++++++++
 include/system/mshv.h          |   3 +
 target/i386/cpu.c              |   8 ++
 target/i386/mshv/mshv-cpu.c    | 227 +++++++++++++++++++++++++++------
 6 files changed, 468 insertions(+), 49 deletions(-)

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2.34.1