From 700a1b10b3a9d021b6a02d0f837ddfde52578634 Mon Sep 17 00:00:00 2001 From: Clyne Sullivan Date: Wed, 20 Apr 2022 23:03:00 -0400 Subject: initial commit --- preinit/linux-headers/asm/mman.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 preinit/linux-headers/asm/mman.h (limited to 'preinit/linux-headers/asm/mman.h') diff --git a/preinit/linux-headers/asm/mman.h b/preinit/linux-headers/asm/mman.h new file mode 100644 index 0000000..d4a8d04 --- /dev/null +++ b/preinit/linux-headers/asm/mman.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _ASM_X86_MMAN_H +#define _ASM_X86_MMAN_H + +#define MAP_32BIT 0x40 /* only give out 32bit addresses */ + +#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)) + +#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)) +#endif + +#include + +#endif /* _ASM_X86_MMAN_H */ -- cgit v1.2.3