This series adds supports for nested virtualisation when using HVF on arm64
Macs.
It has three parts:
- Apple vGICv3 support and necessary infrastructure changes for it
- support for MSI interrupts in GICv3 + GICv2m configurations, which is
independent
from Apple platforms and can be merged independently.
- Nested virtualisation support. Note that the nested virtualisation
implementation
shipping as of macOS 26.0 is nVHE only, and does not leverage VNCR
(FEAT_NV1-style).
Known issues:
- when nested virt is enabled, no UI response within EDK2
and a permanent wait. Workaround: -boot menu=on,splash-time=0. Interrupts do
work later on in Linux.
- Save/restore of GIC state isn't complete yet. Added a migration blocker
for when multiple vCPUs are used.
- This series doesn't contain EL2 physical timer emulation, which is
needed if not leveraging the Apple vGIC.
However, this is usable and there seems to be some interest for it. Hopefully
it'll be at least somewhat useful.
PS: I can step up to maintain HVF support if needed. WHPX arm64 patch series
is coming soon too.
v1->v2:
Oops. I did a mistake when preparing my patches.
- Add hvf_arm_el2_enable(_) call to virt_set_virt
- Fix nested virt support check to add HVF
v2->v3:
- LORC_EL1 patch was merged separately, remove from this series.
- fix LPIs when kernel-irqchip disabled and using TCG
- remove spurious if case in vGIC supported version detection (inapplicable now)
- Add hvf_enabled() check in combination with hvf kernel-irqchip checks
- cleanly fail on attempt to use the platform vGIC together with ITS
v3->v4:
- GIC state save improvements, including saving the opaque Apple-specific state
- Saving HVF system register state when using the vGIC and/or EL2
Mohamed Mediouni (15):
accel, hw/arm, include/system/hvf: infrastructure changes for HVF vGIC
target/arm: hvf: instantiate GIC early
target/arm: hvf: add asserts for code paths not leveraged when using
the vGIC
hw/intc: Add hvf vGIC interrupt controller support
hvf: save/restore Apple GIC state
hw/arm, target/arm: nested virtualisation on HVF
target/arm: hvf: pass through CNTHCTL_EL2 and MDCCINT_EL1
hw/arm: virt: add GICv2m for the case when ITS is not available
target/arm: hvf: use LOG_UNIMP for CNTP_CVAL_EL0/SYSREG_CNTP_CTL_EL0
hw/arm: virt: cleanly fail on attempt to use the platform vGIC
together with ITS
hvf: only call hvf_sync_vtimer() when running without the platform
vGIC
target/arm: hvf: when the platform irqchip is used, abort on writes to
the ptimer
hw/intc: hvf: sync state in c->ich* registers when virt on
hvf: sync registers used at EL2
hw/intc: hvf: add migration blocker when using multiple vCPUs with the
Apple GIC
accel/hvf/hvf-all.c | 44 +++
accel/stubs/hvf-stub.c | 1 +
hw/arm/virt-acpi-build.c | 4 +-
hw/arm/virt.c | 43 ++-
hw/intc/arm_gicv3_common.c | 3 +
hw/intc/arm_gicv3_hvf.c | 749 +++++++++++++++++++++++++++++++++++++
hw/intc/meson.build | 1 +
include/hw/arm/virt.h | 2 +
include/system/hvf.h | 3 +
system/vl.c | 2 +
target/arm/hvf-stub.c | 15 +
target/arm/hvf/hvf.c | 227 ++++++++++-
target/arm/hvf_arm.h | 3 +
13 files changed, 1087 insertions(+), 10 deletions(-)
create mode 100644 hw/intc/arm_gicv3_hvf.c
--
2.39.5 (Apple Git-154)
