tree 25bfb1eaedeb9b971c675e2e311fda5c9d8a8c11
parent 317bfd62bd89b3f7fe7f48ac80534a2f722f9cd3
author Giacomo Travaglini <giacomo.travaglini@arm.com> 1664199548 +0100
committer Giacomo Travaglini <giacomo.travaglini@arm.com> 1664876720 +0000

arch-arm: Add ArmRelease factory function to be used in KVM mode

From gem5 v22.0, EL2 and EL3 are automatically implemented
in the default release object [1]. This means any FS simulation
will start at EL3, which is the highest implemented EL.

Unfortunately this doesn't work in KVM mode, which is assuming
a VM does not start at EL3:

As soon as updateKvmState is called [2] gem5 tries to set
the VM PSTATE to EL3 and KVM fails the ioctl PSTATE write

[1]: https://gem5-review.googlesource.com/c/public/gem5/+/51011
[2]: https://github.com/gem5/gem5/blob/v22.0.0.2/\
    src/arch/arm/kvm/armv8_cpu.cc#L237

Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Change-Id: Icf951bcfb47e0c2ff9abe64b1b9006934303ad48
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64072
Tested-by: kokoro <noreply+kokoro@google.com>