On Thu, Jun 13, 2019 at 12:37:32PM +0100, Dave P Martin wrote: > On Thu, Jun 13, 2019 at 11:15:34AM +0100, Vincenzo Frascino wrote: > > On 12/06/2019 16:35, Catalin Marinas wrote: > > > On Wed, Jun 12, 2019 at 03:21:10PM +0100, Vincenzo Frascino wrote: > > >> + - PR_GET_TAGGED_ADDR_CTRL: can be used to check the status of the Tagged > > >> + Address ABI. [...] > Is there a canonical way to detect whether this whole API/ABI is > available? (i.e., try to call this prctl / check for an HWCAP bit, > etc.) The canonical way is a prctl() call. HWCAP doesn't make sense since it's not a hardware feature. If you really want a different way of detecting this (which I don't think it's worth), we can reinstate the AT_FLAGS bit. -- Catalin
