x86_64 WHPX updates:

- target/i386/emulate fixes
- move HVF x86_mmu code to common code
- fixing debug support, which was broken since around: "gdbstub: move guest debug support check to ops"
a48e7d9e52f8fe8b47f4c74f3e99d9d677b87fe5
- switch over from winhvemulation to common x86 VM exit emulation code
- remove some log lines
- Remove WHPX CPUID traps as they're currently quite broken
- Reworked implementation of the REP prefix for string instructions

Regression note:

target/i386/emulate doesn't currently properly emulate instructions
which might cause a page fault during their execution. Notably, REP STOS/MOVS
from MMIO to an address which is unmapped until a page fault exception is raised
causes an abort() in vmx_write_mem.

This is known to cause a regression when booting Haiku in BIOS mode, with UEFI working.
Or the Hurd when launching X11. Will be addressed in a future patchset, or this one if this
is a blocker... Win9x also hits this scenario.

Changes added since v3:
- Reworked implementation of the REP prefix for string instructions
- Pick up flags conversion for WHPX x86 (used by target/i386/emulate)
- get rid of the goto for the save/restore less state for WHPX patch

Changes added since v2:
- Take target/i386/emulate patches from Bernhard Beschow
https://lore.kernel.org/qemu-devel/20260214131659.31378-1-shentey@gmail.com/
- Rework state levels to an enum
- Skip some state loading on the registers save path too

Changes added since v1:
- move HVF x86_mmu code to common code
- Use x86_mmu in WHPX MMIO exits
- Remove WHPX CPUID traps as they're currently quite broken
- Optimise MMIO vmexits by not restoring the full state

Bernhard Beschow (3):
  target/i386/emulate/x86_decode: Fix compiler warning
  target/i386/hvf/x86_mmu: Fix compiler warning
  target/i386/emulate/x86_decode: Actually use stream in
    decode_instruction_stream()

Mohamed Mediouni (13):
  target/i386/emulate: rework string_rep emulation
  target/i386: emulate, hvf: move x86_mmu to common code
  whpx: i386: re-enable guest debug support
  whpx: preparatory changes before switching over from winhvemulation
  whpx: refactor whpx_destroy_vcpu to arch-specific function
  whpx: move whpx_get_reg/whpx_set_reg to generic code
  whpx: i386: switch over from winhvemulation to target/i386/emulate
  whpx: i386: flags conversion for target/i386/emulate internal state
  whpx: i386: remove remaining winhvemulation support code
  whpx: i386: remove messages
  whpx: i386: remove CPUID trapping
  whpx: common, i386, arm: rework state levels
  whpx: i386: saving/restoring less state for
    WHPX_LEVEL_FAST_RUNTIME_STATE

 accel/whpx/whpx-accel-ops.c            |   8 +
 accel/whpx/whpx-common.c               |  68 +--
 include/system/whpx-accel-ops.h        |  16 +-
 include/system/whpx-all.h              |  11 +-
 include/system/whpx-common.h           |   6 +-
 include/system/whpx-internal.h         |  16 -
 meson.build                            |   3 +-
 target/arm/whpx/whpx-all.c             |  43 +-
 target/i386/cpu.h                      |   2 +-
 target/i386/emulate/meson.build        |   2 +
 target/i386/emulate/x86_decode.c       |   6 +-
 target/i386/emulate/x86_emu.c          |  13 +-
 target/i386/{hvf => emulate}/x86_mmu.c |  20 +-
 target/i386/{hvf => emulate}/x86_mmu.h |   0
 target/i386/hvf/hvf.c                  |  10 +-
 target/i386/hvf/meson.build            |   1 -
 target/i386/hvf/x86.c                  |   2 +-
 target/i386/hvf/x86_task.c             |   2 +-
 target/i386/mshv/meson.build           |   4 +
 target/i386/whpx/whpx-all.c            | 579 ++++++++++---------------
 20 files changed, 358 insertions(+), 454 deletions(-)
 rename target/i386/{hvf => emulate}/x86_mmu.c (92%)
 rename target/i386/{hvf => emulate}/x86_mmu.h (100%)

-- 
2.50.1 (Apple Git-155)