Commit 1f404058 authored Jul 09, 2020 by Aneesh Kumar K.V Committed by Michael Ellerman Jul 20, 2020

powerpc/book3s64/pkeys: Explain key 1 reservation details



This explains the details w.r.t key 1.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709032946.881753-6-aneesh.kumar@linux.ibm.com

parent ee8b3933

arch/powerpc/mm/book3s64/pkeys.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -128,7 +128,10 @@ static int pkey_initialize(void)
		#else
		os_reserved = 0;
		#endif
		/* Bits are in LE format. */
		/*
		* key 1 is recommended not to be used. PowerISA(3.0) page 1015,
		* programming note.
		*/
		reserved_allocation_mask = (0x1 << 1) \| (0x1 << execute_only_key);

		/* register mask is in BE format */

Admin message