kernel/linux.git/arch/powerpc/include/asm/pkeys.h, branch linux-7.0.y

mm: update architecture and driver code to use vm_flags_t

2025-07-10T05:42:14+00:00

In future we intend to change the vm_flags_t type, so it isn't correct for architecture and driver code to assume it is unsigned long. Correct this assumption across the board. Overall, this patch does not introduce any functional change. Link: https://lkml.kernel.org/r/b6eb1894abc5555ece80bb08af5c022ef780c8bc.1750274467.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes Acked-by: Mike Rapoport (Microsoft) Acked-by: Christian Brauner Reviewed-by: Vlastimil Babka Reviewed-by: Oscar Salvador Reviewed-by: Pedro Falcato Acked-by: Catalin Marinas [arm64] Acked-by: Zi Yan Acked-by: David Hildenbrand Reviewed-by: Jarkko Sakkinen Reviewed-by: Anshuman Khandual Cc: Jann Horn Cc: Kees Cook Cc: Liam R. Howlett Cc: Jan Kara Signed-off-by: Andrew Morton

powerpc/pkeys: Remove unused code

2021-02-08T14:09:44+00:00

This removes arch_supports_pkeys(), arch_usable_pkeys() and thread_pkey_regs_*() which are remnants from the following: commit 06bb53b33804 ("powerpc: store and restore the pkey state across context switches") commit 2cd4bd192ee9 ("powerpc/pkeys: Fix handling of pkey state across fork()") commit cf43d3b26452 ("powerpc: Enable pkey subsystem") arch_supports_pkeys() and arch_usable_pkeys() were unused since their introduction while thread_pkey_regs_*() became unused after the introduction of the following: commit d5fa30e6993f ("powerpc/book3s64/pkeys: Reset userspace AMR correctly on exec") commit 48a8ab4eeb82 ("powerpc/book3s64/pkeys: Don't update SPRN_AMR when in kernel mode") Signed-off-by: Sandipan Das Reviewed-by: Ram Pai Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210202150050.75335-1-sandipan@linux.ibm.com

powerpc/book3s64/pkeys: Use MMU_FTR_PKEY instead of pkey_disabled static key

2020-07-20T12:57:59+00:00

Instead of pkey_disabled static key use mmu feature MMU_FTR_PKEY. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-17-aneesh.kumar@linux.ibm.com

powerpc/book3s64/pkeys: Use pkey_execute_disable_supported

2020-07-20T12:57:59+00:00

Use pkey_execute_disable_supported to check for execute key support instead of pkey_disabled. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-16-aneesh.kumar@linux.ibm.com

powerpc/book3s64/pkeys: Make initial_allocation_mask static

2020-07-20T12:57:58+00:00

initial_allocation_mask is not used outside this file. Also mark reserved_allocation_mask and initial_allocation_mask __ro_after_init; Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-12-aneesh.kumar@linux.ibm.com

powerpc/book3s64/pkeys: Convert pkey_total to num_pkey

2020-07-20T12:57:58+00:00

num_pkey now represents max number of keys supported such that we return to userspace 0 - num_pkey - 1. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-11-aneesh.kumar@linux.ibm.com

powerpc/book3s64/pkeys: Simplify pkey disable branch

2020-07-20T12:57:58+00:00

Make the default value FALSE (pkey enabled) and set to TRUE when we find the total number of keys supported to be zero. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-10-aneesh.kumar@linux.ibm.com

powerpc/book3s64/pkeys: pkeys are supported only on hash on book3s.

2020-07-20T12:57:57+00:00

Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-4-aneesh.kumar@linux.ibm.com

powerpc/book3s64/pkeys: Fixup bit numbering

2020-07-20T12:57:57+00:00

This number the pkey bit such that it is easy to follow. PKEY_BIT0 is the lower order bit. This makes further changes easy to follow. No functional change in this patch other than linux page table for hash translation now maps pkeys differently. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-3-aneesh.kumar@linux.ibm.com

mmap locking API: convert mmap_sem comments

2020-06-09T16:39:14+00:00

Convert comments that reference mmap_sem to reference mmap_lock instead. [akpm@linux-foundation.org: fix up linux-next leftovers] [akpm@linux-foundation.org: s/lockaphore/lock/, per Vlastimil] [akpm@linux-foundation.org: more linux-next fixups, per Michel] Signed-off-by: Michel Lespinasse Signed-off-by: Andrew Morton Reviewed-by: Vlastimil Babka Reviewed-by: Daniel Jordan Cc: Davidlohr Bueso Cc: David Rientjes Cc: Hugh Dickins Cc: Jason Gunthorpe Cc: Jerome Glisse Cc: John Hubbard Cc: Laurent Dufour Cc: Liam Howlett Cc: Matthew Wilcox Cc: Peter Zijlstra Cc: Ying Han Link: http://lkml.kernel.org/r/20200520052908.204642-13-walken@google.com Signed-off-by: Linus Torvalds