For many years, information about hardware systems which are certified and supported with the Oracle Solaris OS has been listed on the Hardware Compatibility List.
Information on Oracle's Sun systems is now available to customers who have access to the MOS (My Oracle Support) portal, where it forms part of the complete set of Oracle certifications. Having a single source for all this information will make it much easier for customers to answer their questions about supported hardware and software configurations.
See screenshot below to search for systems certified with Oracle Solaris 11 on My Oracle Support
Search results as displayed on My Oracle Support
Oracle will continue to list both Oracle and non-Oracle systems on the Hardware Compatibility List.