Re: [PATCH v2 1/4] KVM: selftests: Move vm type into _vm_create() internally

From: Andrew Jones
Date: Thu Aug 29 2019 - 12:44:38 EST

On Thu, Aug 29, 2019 at 10:21:14AM +0800, Peter Xu wrote:
> Rather than passing the vm type from the top level to the end of vm
> creation, let's simply keep that as an internal of kvm_vm struct and
> decide the type in _vm_create(). Several reasons for doing this:
> - The vm type is only decided by physical address width and currently
> only used in aarch64, so we've got enough information as long as
> we're passing vm_guest_mode into _vm_create(),
> - This removes a loop dependency between the vm->type and creation of
> vms. That's why now we need to parse vm_guest_mode twice sometimes,
> once in run_test() and then again in _vm_create(). The follow up
> patches will move on to clean up that as well so we can have a
> single place to decide guest machine types and so.
> Note that this patch will slightly change the behavior of aarch64
> tests in that previously most vm_create() callers will directly pass
> in type==0 into _vm_create() but now the type will depend on
> vm_guest_mode, however it shouldn't affect any user because all
> vm_create() users of aarch64 will be using VM_MODE_DEFAULT guest
> mode (which is VM_MODE_P40V48_4K) so at last type will still be zero.
> Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
> ---
> tools/testing/selftests/kvm/dirty_log_test.c | 13 +++---------
> .../testing/selftests/kvm/include/kvm_util.h | 3 +--
> tools/testing/selftests/kvm/lib/kvm_util.c | 21 ++++++++++++-------
> 3 files changed, 17 insertions(+), 20 deletions(-)

Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>