>> + >> +When CONFIG_ARM64_PTR_AUTH is selected, and relevant HW support is >> +present, the kernel will assign a random APIAKey value to each process >> +at exec*() time. This key is shared by all threads within the process, >> +and the key is preserved across fork(). Presence of functionality using >> +APIAKey is advertised via HWCAP_APIA. > > It might be useful to include documentation here on how many bits of > the address are being used for the PAC bits (I'm assuming it's 7?) the number of bits available depends on the VA size, so you can't really document a number. Ramana > > -Kees >
