Link to branch: https://github.com/mediouni-m/qemu whpx (tag for this submission: whpx-v10)

Missing features:
- PSCI state sync with Hyper-V for VM save/restore (which isn't supported because of the second item)
- Interrupt controller save-restore: As such, save/restore of VM state is currently blocked.
- SVE register sync: I didn't have the time to test this on pre-release hardware with SVE2 support yet.

Known bugs:
- U-Boot still doesn't work (hangs when trying to parse firmware) but EDK2 does.

Note:

"target/arm/kvm: add constants for new PSCI versions" taken from the mailing list.

"accel/system: Introduce hwaccel_enabled() helper" taken from the mailing list, added here
as part of this series to make it compilable as a whole.

"hw/arm: virt: add GICv2m for the case when ITS is not available" present in both the HVF
vGIC and this series.

And another note:
Seems that unlike HVF there isn't direct correspondence between WHv registers and the actual register layout,
so didn't do changes there to a sysreg.inc.

And yet another note:
On build 26200 on Snapdragon X, I often observe CLOCK_WATCHDOG_TIMEOUT BSoDs _on the host_ when using WHPX qemu. This is currently
being looked at. This also affects prior revisions of this patch series.

Updates since v9:
- Adding partition reset on the reboot side of things...

Updates since v8:
- v9 and v8 were not submitted properly because of my MTA not behaving, sorry for that.
- v10 introduces a new argument, -M msi=, to handle MSI-X configuration more granularly.
- That surfaced what I think is a bug (?), with vms->its=1 on GICv2 configurations... or I did understand everything wrong.
- Oopsie due to email provider ratelimiting.

Updates since v7:
- Oops, fixing bug in "hw/arm: virt: cleanly fail on attempt to use the platform vGIC together with ITS".
Other commits are unchanged.

Updates since v6:
- Rebasing
- Fixing a bug in the GICv3+GICv2m case for ACPI table generation
- getting rid of the slots infrastructure for memory management
- Place the docs commit right after the "cleanly fail on attempt to run GICv3+GICv2m on an unsupported config" one
as that's what switches ITS to a tristate.
- Fixing a build issue when getting rid of the arch-specific arm64 hvf-stub.

Updates since v5:
- Rebasing
- Address review comments
- Rework ITS enablement to a tristate
- On x86: move away from deprecated APIs to get/set APIC state

Updates since v4:
- Taking into account review comments
- Add migration blocker in the vGICv3 code due to missing interrupt controller save/restore
- Debug register sync

Updates since v3:
- Disabling SVE on WHPX
- Taking into account review comments incl:

- fixing x86 support
- reduce the amount of __x86_64__ checks in common code to the minimum (winhvemulation)
which can be reduced even further down the road.
- generalize get_physical_address_range into something common between hvf and whpx

Updates since v2:
- Fixed up a rebase screwup for whpx-internal.h
- Fixed ID_AA64ISAR1_EL1 and ID_AA64ISAR2_EL1 feature probe for -cpu host
- Switched to ID_AA64PFR1_EL1/ID_AA64DFR0_EL1 instead of their non-AA64 variant

Updates since v1:
- Shutdowns and reboots
- MPIDR_EL1 register sync
- Fixing GICD_TYPER_LPIS value
- IPA size clamping
- -cpu host now implemented

Mohamed Mediouni (26):
  qtest: hw/arm: virt: skip ACPI test for ITS off
  hw/arm: virt: add GICv2m for the case when ITS is not available
  tests: data: update AArch64 ACPI tables
  whpx: Move around files before introducing AArch64 support
  whpx: reshuffle common code
  whpx: ifdef out winhvemulation on non-x86_64
  whpx: common: add WHPX_INTERCEPT_DEBUG_TRAPS define
  hw, target, accel: whpx: change apic_in_platform to kernel_irqchip
  whpx: interrupt controller support
  whpx: add arm64 support
  whpx: change memory management logic
  target/arm: cpu: mark WHPX as supporting PSCI 1.3
  hw/arm: virt: cleanly fail on attempt to use the platform vGIC
    together with ITS
  hw: arm: virt: rework MSI-X configuration
  hw: arm: virt-acpi-build: add hack
  docs: arm: update virt machine model description
  whpx: arm64: clamp down IPA size
  hw/arm, accel/hvf, whpx: unify get_physical_address_range between WHPX
    and HVF
  whpx: arm64: implement -cpu host
  target/arm: whpx: instantiate GIC early
  whpx: arm64: gicv3: add migration blocker
  whpx: enable arm64 builds
  MAINTAINERS: update maintainers for WHPX
  whpx: apic: use non-deprecated APIs to control interrupt controller
    state
  whpx: arm64: check for physical address width after WHPX availability
  whpx: arm64: add partition-wide reset on the reboot path

Philippe Mathieu-Daudé (1):
  accel/system: Introduce hwaccel_enabled() helper

Sebastian Ott (1):
  target/arm/kvm: add constants for new PSCI versions

 MAINTAINERS                                   |   11 +-
 accel/hvf/hvf-all.c                           |    7 +-
 accel/meson.build                             |    1 +
 accel/whpx/meson.build                        |    7 +
 {target/i386 => accel}/whpx/whpx-accel-ops.c  |    6 +-
 accel/whpx/whpx-common.c                      |  548 +++++++++
 docs/system/arm/virt.rst                      |   10 +-
 hw/arm/virt-acpi-build.c                      |   16 +-
 hw/arm/virt.c                                 |  132 ++-
 hw/i386/x86-cpu.c                             |    4 +-
 hw/intc/arm_gicv3_common.c                    |    3 +
 hw/intc/arm_gicv3_whpx.c                      |  249 ++++
 hw/intc/meson.build                           |    1 +
 include/hw/arm/virt.h                         |    8 +-
 include/hw/boards.h                           |    3 +-
 include/hw/intc/arm_gicv3_common.h            |    3 +
 include/system/hvf_int.h                      |    2 +
 include/system/hw_accel.h                     |   13 +
 .../whpx => include/system}/whpx-accel-ops.h  |    4 +-
 include/system/whpx-all.h                     |   20 +
 include/system/whpx-common.h                  |   26 +
 .../whpx => include/system}/whpx-internal.h   |   25 +-
 include/system/whpx.h                         |    4 +-
 meson.build                                   |   20 +-
 target/arm/cpu.c                              |    3 +
 target/arm/cpu64.c                            |   19 +-
 target/arm/hvf-stub.c                         |   20 -
 target/arm/hvf/hvf.c                          |    6 +-
 target/arm/hvf_arm.h                          |    3 -
 target/arm/kvm-consts.h                       |    2 +
 target/arm/meson.build                        |    2 +-
 target/arm/whpx/meson.build                   |    5 +
 target/arm/whpx/whpx-all.c                    | 1020 +++++++++++++++++
 target/arm/whpx/whpx-stub.c                   |   15 +
 target/arm/whpx_arm.h                         |   17 +
 target/i386/cpu-apic.c                        |    2 +-
 target/i386/hvf/hvf.c                         |   11 +
 target/i386/whpx/meson.build                  |    1 -
 target/i386/whpx/whpx-all.c                   |  569 +--------
 target/i386/whpx/whpx-apic.c                  |   48 +-
 tests/data/acpi/aarch64/virt/APIC.its_off     |  Bin 164 -> 188 bytes
 41 files changed, 2216 insertions(+), 650 deletions(-)
 create mode 100644 accel/whpx/meson.build
 rename {target/i386 => accel}/whpx/whpx-accel-ops.c (96%)
 create mode 100644 accel/whpx/whpx-common.c
 create mode 100644 hw/intc/arm_gicv3_whpx.c
 rename {target/i386/whpx => include/system}/whpx-accel-ops.h (92%)
 create mode 100644 include/system/whpx-all.h
 create mode 100644 include/system/whpx-common.h
 rename {target/i386/whpx => include/system}/whpx-internal.h (88%)
 delete mode 100644 target/arm/hvf-stub.c
 create mode 100644 target/arm/whpx/meson.build
 create mode 100644 target/arm/whpx/whpx-all.c
 create mode 100644 target/arm/whpx/whpx-stub.c
 create mode 100644 target/arm/whpx_arm.h

-- 
2.50.1 (Apple Git-155)

> On 29. Oct 2025, at 17:54, Mohamed Mediouni <mohamed@unpredictable.fr> wrote:
> 
> Link to branch: https://github.com/mediouni-m/qemu whpx (tag for this submission: whpx-v10)
> 
> And yet another note:
> On build 26200 on Snapdragon X, I often observe CLOCK_WATCHDOG_TIMEOUT BSoDs _on the host_ when using WHPX qemu. This is currently
> being looked at. This also affects prior revisions of this patch series.

More details on that:

When specifying both -cpu to a valid value _and_ -bios to firmware (or the pflash arguments), Qemu will work.
When not doing that, the host OS will crash with a BSoD.

Currently taking further a look into that...

Thank you,