Messages in this thread | | | From | Ramana Radhakrishnan <> | Subject | Re: [PATCH v5 11/17] arm64: docs: document pointer authentication | Date | Fri, 2 Nov 2018 09:46:47 +0000 |
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>> + >> +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 >
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