kvmtool: arm64: Use the maximum supported IPA size when creating the VM

Instead of just asking the the default VM size, request the maximum
IPA size to the kernel, and use this at VM creation time.

The IPA space is parametrized accordingly.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Oliver Upton <oupton@google.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Link: https://lore.kernel.org/r/20210822152526.1291918-3-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2 files changed