KVM: arm64: nv: Ensure correct VL is loaded before saving SVE state

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It is possible that the guest hypervisor has selected a smaller VL than
the maximum for its nested guest. As such, ZCR_EL2 may be configured for
a different VL when exiting a nested guest.

Set ZCR_EL2 (via the EL1 alias) to the maximum VL for the VM before
saving SVE state as the SVE save area is dimensioned by the max VL.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240620164653.1130714-8-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Oliver Upton 2024-06-20 16:46:44 +00:00

parent 9092aca9fe

commit 2e3cf82063

1 changed files with 7 additions and 4 deletions

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arch/arm64/kvm/fpsimd.c

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