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alistair23-linux/arch/x86/include/uapi/asm/mman.h

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License cleanup: add SPDX license identifier to uapi header files with no license Many user space API headers are missing licensing information, which makes it hard for compliance tools to determine the correct license. By default are files without license information under the default license of the kernel, which is GPLV2. Marking them GPLV2 would exclude them from being included in non GPLV2 code, which is obviously not intended. The user space API headers fall under the syscall exception which is in the kernels COPYING file: NOTE! This copyright does *not* cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does *not* fall under the heading of "derived work". otherwise syscall usage would not be possible. Update the files which contain no license information with an SPDX license identifier. The chosen identifier is 'GPL-2.0 WITH Linux-syscall-note' which is the officially assigned identifier for the Linux syscall exception. SPDX license identifiers are a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. See the previous patch in this series for the methodology of how this patch was researched. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 08:08:43 -06:00
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
x86: Fix ASM_X86__ header guards Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-22 23:26:29 -06:00
#ifndef _ASM_X86_MMAN_H
#define _ASM_X86_MMAN_H
x86: unify include/asm/mman_32/64.h Same file, except for the extra 64bit MAP_32BIT define, which does not hurt for 32 bit compiles. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-15 15:28:21 -06:00
#define MAP_32BIT 0x40 /* only give out 32bit addresses */
x86/mm/pkeys: Add arch-specific VMA protection bits Lots of things seem to do: vma->vm_page_prot = vm_get_page_prot(flags); and the ptes get created right from things we pull out of ->vm_page_prot. So it is very convenient if we can store the protection key in flags and vm_page_prot, just like the existing permission bits (_PAGE_RW/PRESENT). It greatly reduces the amount of plumbing and arch-specific hacking we have to do in generic code. This also takes the new PROT_PKEY{0,1,2,3} flags and turns *those* in to VM_ flags for vma->vm_flags. The protection key values are stored in 4 places: 1. "prot" argument to system calls 2. vma->vm_flags, filled from the mmap "prot" 3. vma->vm_page prot, filled from vma->vm_flags 4. the PTE itself. The pseudocode for these for steps are as follows: mmap(PROT_PKEY*) vma->vm_flags = ... | arch_calc_vm_prot_bits(mmap_prot); vma->vm_page_prot = ... | arch_vm_get_page_prot(vma->vm_flags); pte = pfn | vma->vm_page_prot Note that this provides a new definitions for x86: arch_vm_get_page_prot() Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210210.FE483A42@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-12 14:02:10 -07:00
#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
/*
* Take the 4 protection key bits out of the vma->vm_flags
* value and turn them in to the bits that we can put in
* to a pte.
*
* Only override these if Protection Keys are available
* (which is only on 64-bit).
*/
#define arch_vm_get_page_prot(vm_flags) __pgprot( \
((vm_flags) & VM_PKEY_BIT0 ? _PAGE_PKEY_BIT0 : 0) | \
((vm_flags) & VM_PKEY_BIT1 ? _PAGE_PKEY_BIT1 : 0) | \
((vm_flags) & VM_PKEY_BIT2 ? _PAGE_PKEY_BIT2 : 0) | \
((vm_flags) & VM_PKEY_BIT3 ? _PAGE_PKEY_BIT3 : 0))
x86/mm/pkeys: Create an x86 arch_calc_vm_prot_bits() for VMA flags calc_vm_prot_bits() takes PROT_{READ,WRITE,EXECUTE} bits and turns them in to the vma->vm_flags/VM_* bits. We need to do a similar thing for protection keys. We take a protection key (4 bits) and encode it in to the 4 VM_PKEY_* bits. Note: this code is not new. It was simply a part of the mprotect_pkey() patch in the past. I broke it out for use in the execute-only support. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210237.CFB94AD5@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-12 14:02:37 -07:00
#define arch_calc_vm_prot_bits(prot, key) ( \
((key) & 0x1 ? VM_PKEY_BIT0 : 0) | \
((key) & 0x2 ? VM_PKEY_BIT1 : 0) | \
((key) & 0x4 ? VM_PKEY_BIT2 : 0) | \
((key) & 0x8 ? VM_PKEY_BIT3 : 0))
x86/mm/pkeys: Add arch-specific VMA protection bits Lots of things seem to do: vma->vm_page_prot = vm_get_page_prot(flags); and the ptes get created right from things we pull out of ->vm_page_prot. So it is very convenient if we can store the protection key in flags and vm_page_prot, just like the existing permission bits (_PAGE_RW/PRESENT). It greatly reduces the amount of plumbing and arch-specific hacking we have to do in generic code. This also takes the new PROT_PKEY{0,1,2,3} flags and turns *those* in to VM_ flags for vma->vm_flags. The protection key values are stored in 4 places: 1. "prot" argument to system calls 2. vma->vm_flags, filled from the mmap "prot" 3. vma->vm_page prot, filled from vma->vm_flags 4. the PTE itself. The pseudocode for these for steps are as follows: mmap(PROT_PKEY*) vma->vm_flags = ... | arch_calc_vm_prot_bits(mmap_prot); vma->vm_page_prot = ... | arch_vm_get_page_prot(vma->vm_flags); pte = pfn | vma->vm_page_prot Note that this provides a new definitions for x86: arch_vm_get_page_prot() Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210210.FE483A42@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-12 14:02:10 -07:00
#endif
x86: remove all now-duplicate header files All files that have been made identical to the asm-generic version in the previous patches can now be removed, guaranteeing that this does not introduce semantic changes. Signed-off-by: Arnd Bergmann <arnd@arndb.de> LKML-Reference: <cover.1245354003.git.arnd@arndb.de> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-06-18 13:48:20 -06:00
#include <asm-generic/mman.h>
x86: unify include/asm/mman_32/64.h Same file, except for the extra 64bit MAP_32BIT define, which does not hurt for 32 bit compiles. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-15 15:28:21 -06:00
x86: Fix ASM_X86__ header guards Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-22 23:26:29 -06:00
#endif /* _ASM_X86_MMAN_H */
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