[Qemu-devel] [PATCH 0/3] target/arm: Support EL1 AArch32 guest under AArch64 EL2

[Peter Maydell]

The GICv3 virt patchset is sufficient to run a 64-bit guest under
a 64-bit host kernel. To run 32-bit guests under the 64-bit host
you need a few more things:
 * data aborts from AArch32 need to provide instruction syndrome info
   to the hypervisor
 * the AArch32 interrupt code needs to handle VIRQ and VFIQ
 * we need a DBGVCR32_EL2 register, because Linux's EL2 code uses
   it to context-switch AArch32 DBGVCR between guests

This patchset sits on top of the gicv3-virt patchset and is
sufficient to run a Linux 32-bit guest under 64-bit Linux host.

Git branch with the whole lot:
 https://git.linaro.org/people/peter.maydell/qemu-arm.git aarch32-guest


Peter Maydell (3):
  target/arm: A32, T32: Create Instruction Syndromes for Data Aborts
  target/arm: Handle VIRQ and VFIQ in arm_cpu_do_interrupt_aarch32()
  target/arm: Implement DBGVCR32_EL2 system register

 target/arm/helper.c    |  21 +++++
 target/arm/translate.c | 213 ++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 178 insertions(+), 56 deletions(-)

-- 
2.7.4