kernel/linux.git/arch/powerpc/include/asm/mman.h, branch v6.7

powerpc: Include asm/firmware.h in all users of firmware_has_feature()

2022-06-29T06:45:05+00:00

Trying to remove asm/ppc_asm.h from all places that don't need it leads to several failures linked to firmware_has_feature(). To fix it, include asm/firmware.h in all files using firmware_has_feature() All users found with: git grep -L "firmware\.h" ` git grep -l "firmware_has_feature("` Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/11956ec181a034b51a881ac9c059eea72c679a73.1651828453.git.christophe.leroy@csgroup.eu

powerpc/mm: enable ARCH_HAS_VM_GET_PAGE_PROT

2022-04-29T06:16:13+00:00

This defines and exports a platform specific custom vm_get_page_prot() via subscribing ARCH_HAS_VM_GET_PAGE_PROT. While here, this also localizes arch_vm_get_page_prot() as __vm_get_page_prot() and moves it near vm_get_page_prot(). Link: https://lkml.kernel.org/r/20220414062125.609297-3-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Reviewed-by: Christophe Leroy Cc: Michael Ellerman Cc: Paul Mackerras Cc: Catalin Marinas Cc: Christoph Hellwig Cc: David S. Miller Cc: Ingo Molnar Cc: Khalid Aziz Cc: Thomas Gleixner Cc: Will Deacon Signed-off-by: Andrew Morton

powerpc/64s: Disallow PROT_SAO in LPARs by default

2020-08-24T04:12:54+00:00

Since migration of guests using SAO to ISA 3.1 hosts may cause issues, disable PROT_SAO in LPARs by default and introduce a new Kconfig option PPC_PROT_SAO_LPAR to allow users to enable it if desired. Signed-off-by: Shawn Anastasio Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200821185558.35561-3-shawn@anastas.io

Revert "powerpc/64s: Remove PROT_SAO support"

2020-08-24T04:12:53+00:00

This reverts commit 5c9fa16e8abd342ce04dc830c1ebb2a03abf6c05. Since PROT_SAO can still be useful for certain classes of software, reintroduce it. Concerns about guest migration for LPARs using SAO will be addressed next. Signed-off-by: Shawn Anastasio Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200821185558.35561-2-shawn@anastas.io

powerpc/64s: Remove PROT_SAO support

2020-07-21T14:01:25+00:00

ISA v3.1 does not support the SAO storage control attribute required to implement PROT_SAO. PROT_SAO was used by specialised system software (Lx86) that has been discontinued for about 7 years, and is not thought to be used elsewhere, so removal should not cause problems. We rather remove it than keep support for older processors, because live migrating guest partitions to newer processors may not be possible if SAO is in use (or worse allowed with silent races). - PROT_SAO stays in the uapi header so code using it would still build. - arch_validate_prot() is removed, the generic version rejects PROT_SAO so applications would get a failure at mmap() time. Signed-off-by: Nicholas Piggin [mpe: Drop KVM change for the time being] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200703011958.1166620-3-npiggin@gmail.com

powerpc: Remove stale calc_vm_prot_bits() comment

2020-07-21T14:01:24+00:00

This comment is wrong, we wouldn't use calc_vm_prot_bits() here because we are being called by calc_vm_prot_bits() to modify its behaviour. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200703011958.1166620-2-npiggin@gmail.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

mm: Add address parameter to arch_validate_prot()

2018-03-18T14:38:47+00:00

A protection flag may not be valid across entire address space and hence arch_validate_prot() might need the address a protection bit is being set on to ensure it is a valid protection flag. For example, sparc processors support memory corruption detection (as part of ADI feature) flag on memory addresses mapped on to physical RAM but not on PFN mapped pages or addresses mapped on to devices. This patch adds address to the parameters being passed to arch_validate_prot() so protection bits can be validated in the relevant context. Signed-off-by: Khalid Aziz Cc: Khalid Aziz Reviewed-by: Anthony Yznaga Acked-by: Michael Ellerman (powerpc) Acked-by: Andrew Morton Signed-off-by: David S. Miller

powerpc: map vma key-protection bits to pte key bits.

2018-01-20T11:59:02+00:00

Map the key protection bits of the vma to the pkey bits in the PTE. The PTE bits used for pkey are 3,4,5,6 and 57. The first four bits are the same four bits that were freed up initially in this patch series. remember? :-) Without those four bits this patch wouldn't be possible. BUT, on 4k kernel, bit 3, and 4 could not be freed up. remember? Hence we have to be satisfied with 5, 6 and 7. Signed-off-by: Ram Pai Signed-off-by: Michael Ellerman

powerpc: ability to associate pkey to a vma

2018-01-20T11:59:01+00:00

arch-independent code expects the arch to map a pkey into the vma's protection bit setting. The patch provides that ability. Signed-off-by: Ram Pai Signed-off-by: Michael Ellerman