[PATCH] arm64/kvm: Add generic v8 KVM target

[Peter Maydell]

On 17 June 2015 at 10:00, Suzuki K. Poulose <suzuki.poulose at arm.com> wrote:
> From: "Suzuki K. Poulose" <suzuki.poulose at arm.com>
>
> This patch adds a generic ARM v8 KVM target cpu type for use
> by the new CPUs which eventualy ends up using the common sys_reg
> table. For backward compatibility the existing targets have been
> preserved. Any new target CPU that can be covered by generic v8
> sys_reg tables should make use of the new generic target.

How do you intend this to work for cross-host migration?
Is the idea that the kernel guarantees that "generic" looks
100% the same to the guest regardless of host hardware? I'm
not sure that can be made to work, given impdef differences
in ID register values, bp/wp registers, and so on.

Given that, it seems to me that we still need to provide
KVM_ARM_TARGET_$THISCPU defines so userspace can request
a specific guest CPU flavour; so what does this patch
provide that isn't already provided by just having userspace
query for the "preferred" CPU type as it does already?

thanks
-- PMM