[v2,0/6] target/arm: Add nested virtualization support

Message

Haibo Xu April 1, 2021, 10:40 a.m. UTC

v2:
  - Move the NV to a CPU feature flag(Andrea&Andrew)
  - Add CPU feature 'el2' test(Andrew)

Many thanks to Andrea and Andrew for their comments!

This series add support for ARMv8.3/8.4 nested virtualization support
in KVM mode. It's based on Marc Zyngier's kernel KVM patches[1], and 
has been tested on a FVP model to run a L2 guest with Qemu. Now the 
feature can be enabled by "-M virt,accel=kvm,virtualization=on" when
starting a VM. 

[1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-5.12-WIP

Haibo Xu (6):
  Update linux header with new arm64 NV macro
  target/arm/kvm: Add helper to detect el2 when using KVM
  target/arm/kvm: Add an option to turn on/off el2 support
  hw/intc/arm_gicv3: Enable support for setting vGIC maintenance IRQ
  target/arm/cpu: Enable 'el2' to work with host/max cpu
  target/arm: Add vCPU feature 'el2' test.

 hw/arm/virt.c                      | 19 ++++++++---
 hw/intc/arm_gicv3_common.c         |  1 +
 hw/intc/arm_gicv3_kvm.c            | 16 +++++++++
 include/hw/intc/arm_gicv3_common.h |  1 +
 linux-headers/asm-arm64/kvm.h      |  2 ++
 linux-headers/linux/kvm.h          |  1 +
 target/arm/cpu.c                   | 14 +++++++-
 target/arm/cpu.h                   |  4 +++
 target/arm/cpu64.c                 | 53 ++++++++++++++++++++++++++++++
 target/arm/kvm64.c                 | 15 +++++++++
 target/arm/kvm_arm.h               | 13 ++++++++
 target/arm/monitor.c               |  2 +-
 tests/qtest/arm-cpu-features.c     |  9 +++++
 13 files changed, 144 insertions(+), 6 deletions(-)