On Tue, Dec 17, 2019 at 02:44:04PM -0500, Stefan Berger wrote:
On 12/16/19 7:29 PM, David Gibson wrote:
Since you need to change compatible based on an internal variable,
we'd need to replace the static dt_compatible in the class with a
callback.
Why can we not initialize it once we know the version of TPM? From the
perspective of SLOF at least this seems to be building the device tree fine
since it sees the proper value...
Because it's a serious layering / isolation violation. You're
modifying QOM type information from the runtime code of a specific
instance. You get away with it (now) because there's only one
instance and the ordering of things happens to let it work, but that's
assuming way too much about QOM's implementation details.
As a rule, once the QOM classes are set up with their class_init
function, they should never be modified.