[PATCH v2 0/3] Add CPU topology extension support for mshv guests

["Doru Blânzeanu" <dblanzeanu@linux.microsoft.com>]

This patch changes how MSHV constructs and registers the guest CPUID table.
It consists of three commits:

1. i386/cpu.c: Adjust minimum xlevel to 0x8000_001E when TOPOEXT is enabled
2. mshv/mshv-cpu.c: Collect all Intel topology subleaves and AMD cache subleaves
3. accel/mshv: Enable SMT support for the mshv partition

The first commit changes the extended CPUID level to 0x8000_001E when the TOPOEXT
feature is enabled.
This fix correctly reports CPU topology and cache leaves when TOPOEXT is
enabled.

Previous to the second commit, `collect_cpuid_entries` treated `0x0b` and `0x1f`
like ordinary leaves and collected only sub-leaf zero. But these Intel topology
leaves contain one sub-leaf per topology level.
With this patch, now it repeatedly calls `cpu_x86_cpuid` and stores every
result until ECX[15:8] becomes zero (same as kvm does).

Changes since V1:
- Enable SMT support in the mshv partition

Doru Blânzeanu (3):
  i386/cpu.c: Adjust minimum xlevel to 0x8000_001E when TOPOEXT is
    enabled
  mshv/mshv-cpu.c: Collect all Intel topology subleaves and AMD cache
    subleaves
  accel/mshv: Enable SMT support for the mshv partition

 accel/mshv/mshv-all.c       |  3 ++-
 target/i386/cpu.c           |  5 +++++
 target/i386/mshv/mshv-cpu.c | 41 +++++++++++++++++++++++++++++--------
 3 files changed, 40 insertions(+), 9 deletions(-)

-- 
2.54.0