[PATCH 0/2] KVM: arm64: Fixes for NV+SVE

[Oliver Upton <oliver.upton@linux.dev>]

After staring at the ZCR_EL2 handling for the issue Jan reported I
also spotted an ugly preemption bug because ZCR_EL2 residence is *very*
different from the other sysregs.

We could definitely get away with loading ZCR_ELx on the CPU at
vcpu_load() but I'd rather not given the amount of special treatment
that we need to do for it already.

In addition to that, I've taken the liberty of forging Marc's authorship
and SOB on the SVE exception fix, figured he wont mind :-)

Applies to kvmarm-6.18, tested with QEMU-TCG (only implementation >128
bit) with L0: VL=512, L1: VL=256, and L2: VL=128.

Marc Zyngier (1):
  KVM: arm64: nv: Don't advance PC when pending an SVE exception

Oliver Upton (1):
  KVM: arm64: nv: Don't treat ZCR_EL2 as a 'mapped' register

 arch/arm64/kvm/sys_regs.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)


base-commit: 10fd0285305d0b48e8a3bf15d4f17fc4f3d68cb6
-- 
2.39.5