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https://github.com/freebsd/freebsd-src
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4441dd4094
Fixes: b16b4c22d2 ("vm_page: Implement lazy page initialization")
Reported by: Steffen Nurpmeso <steffen@sdaoden.eu>
327 lines
10 KiB
C
327 lines
10 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 1994 John S. Dyson
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* from: FreeBSD: src/sys/i386/include/vmparam.h,v 1.33 2000/03/30
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*/
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#ifdef __arm__
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#include <arm/vmparam.h>
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#else /* !__arm__ */
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#ifndef _MACHINE_VMPARAM_H_
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#define _MACHINE_VMPARAM_H_
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (1*1024*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (128*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (1*1024*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (128*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (1*1024*1024*1024) /* max stack size */
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#endif
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#ifndef SGROWSIZ
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#define SGROWSIZ (128*1024) /* amount to grow stack */
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#endif
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/*
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* The physical address space is sparsely populated.
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*/
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#define VM_PHYSSEG_SPARSE
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/*
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* The number of PHYSSEG entries.
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*/
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#define VM_PHYSSEG_MAX 64
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/*
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* Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool from
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* which physical pages are allocated and VM_FREEPOOL_DIRECT is the pool from
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* which physical pages for page tables and small UMA objects are allocated.
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* VM_FREEPOOL_LAZYINIT is a special-purpose pool that is populated only during
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* boot and is used to implement deferred initialization of page structures.
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*/
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#define VM_NFREEPOOL 3
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#define VM_FREEPOOL_LAZYINIT 0
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#define VM_FREEPOOL_DEFAULT 1
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#define VM_FREEPOOL_DIRECT 2
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/*
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* Create two free page lists: VM_FREELIST_DMA32 is for physical pages that have
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* physical addresses below 4G, and VM_FREELIST_DEFAULT is for all other
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* physical pages.
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*/
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#define VM_NFREELIST 2
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_DMA32 1
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/*
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* When PAGE_SIZE is 4KB, an allocation size of 16MB is supported in order
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* to optimize the use of the direct map by UMA. Specifically, a 64-byte
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* cache line contains at most 8 L2 BLOCK entries, collectively mapping 16MB
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* of physical memory. By reducing the number of distinct 16MB "pages" that
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* are used by UMA, the physical memory allocator reduces the likelihood of
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* both 2MB page TLB misses and cache misses during the page table walk when
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* a 2MB page TLB miss does occur.
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*
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* When PAGE_SIZE is 16KB, an allocation size of 32MB is supported. This
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* size is used by level 0 reservations and L2 BLOCK mappings.
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*/
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#if PAGE_SIZE == PAGE_SIZE_4K
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#define VM_NFREEORDER 13
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#elif PAGE_SIZE == PAGE_SIZE_16K
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#define VM_NFREEORDER 12
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#else
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#error Unsupported page size
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#endif
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/*
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* Enable superpage reservations: 1 level.
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*/
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#ifndef VM_NRESERVLEVEL
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#define VM_NRESERVLEVEL 1
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#endif
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/*
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* Level 0 reservations consist of 512 pages when PAGE_SIZE is 4KB, and
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* 2048 pages when PAGE_SIZE is 16KB.
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*/
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#ifndef VM_LEVEL_0_ORDER
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#if PAGE_SIZE == PAGE_SIZE_4K
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#define VM_LEVEL_0_ORDER 9
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#elif PAGE_SIZE == PAGE_SIZE_16K
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#define VM_LEVEL_0_ORDER 11
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#else
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#error Unsupported page size
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#endif
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#endif
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/**
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* Address space layout.
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*
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* ARMv8 implements up to a 48 bit virtual address space. The address space is
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* split into 2 regions at each end of the 64 bit address space, with an
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* out of range "hole" in the middle.
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*
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* We use the full 48 bits for each region, however the kernel may only use
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* a limited range within this space.
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*
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* Upper region: 0xffffffffffffffff Top of virtual memory
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*
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* 0xfffffeffffffffff End of DMAP
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* 0xffffa00000000000 Start of DMAP
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*
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* 0xffff027fffffffff End of KMSAN origin map
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* 0xffff020000000000 Start of KMSAN origin map
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*
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* 0xffff017fffffffff End of KMSAN shadow map
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* 0xffff010000000000 Start of KMSAN shadow map
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*
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* 0xffff009fffffffff End of KASAN shadow map
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* 0xffff008000000000 Start of KASAN shadow map
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*
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* 0xffff007fffffffff End of KVA
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* 0xffff000000000000 Kernel base address & start of KVA
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*
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* Hole: 0xfffeffffffffffff
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* 0x0001000000000000
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*
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* Lower region: 0x0000ffffffffffff End of user address space
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* 0x0000000000000000 Start of user address space
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*
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* We use the upper region for the kernel, and the lower region for userland.
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*
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* We define some interesting address constants:
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*
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* VM_MIN_ADDRESS and VM_MAX_ADDRESS define the start and end of the entire
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* 64 bit address space, mostly just for convenience.
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*
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* VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS define the start and end of
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* mappable kernel virtual address space.
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*
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* VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the
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* user address space.
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*/
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#define VM_MIN_ADDRESS (0x0000000000000000UL)
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#define VM_MAX_ADDRESS (0xffffffffffffffffUL)
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/* 512 GiB of kernel addresses */
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#define VM_MIN_KERNEL_ADDRESS (0xffff000000000000UL)
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#define VM_MAX_KERNEL_ADDRESS (0xffff008000000000UL)
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/* 128 GiB KASAN shadow map */
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#define KASAN_MIN_ADDRESS (0xffff008000000000UL)
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#define KASAN_MAX_ADDRESS (0xffff00a000000000UL)
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/* 512GiB KMSAN shadow map */
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#define KMSAN_SHAD_MIN_ADDRESS (0xffff010000000000UL)
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#define KMSAN_SHAD_MAX_ADDRESS (0xffff018000000000UL)
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/* 512GiB KMSAN origin map */
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#define KMSAN_ORIG_MIN_ADDRESS (0xffff020000000000UL)
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#define KMSAN_ORIG_MAX_ADDRESS (0xffff028000000000UL)
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/* The address bits that hold a pointer authentication code */
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#define PAC_ADDR_MASK (0xff7f000000000000UL)
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/* If true addr is in the kernel address space */
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#define ADDR_IS_KERNEL(addr) (((addr) & (1ul << 55)) == (1ul << 55))
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/* If true addr is in its canonical form (i.e. no TBI, PAC, etc.) */
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#define ADDR_IS_CANONICAL(addr) \
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(((addr) & 0xffff000000000000UL) == 0 || \
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((addr) & 0xffff000000000000UL) == 0xffff000000000000UL)
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#define ADDR_MAKE_CANONICAL(addr) ({ \
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__typeof(addr) _tmp_addr = (addr); \
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\
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_tmp_addr &= ~0xffff000000000000UL; \
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if (ADDR_IS_KERNEL(addr)) \
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_tmp_addr |= 0xffff000000000000UL; \
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\
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_tmp_addr; \
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})
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/* 95 TiB maximum for the direct map region */
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#define DMAP_MIN_ADDRESS (0xffffa00000000000UL)
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#define DMAP_MAX_ADDRESS (0xffffff0000000000UL)
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#define DMAP_MIN_PHYSADDR (dmap_phys_base)
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#define DMAP_MAX_PHYSADDR (dmap_phys_max)
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/*
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* Checks to see if a physical address is in the DMAP range.
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* - PHYS_IN_DMAP_RANGE will return true that may be within the DMAP range
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* but not accessible through the DMAP, e.g. device memory between two
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* DMAP physical address regions.
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* - PHYS_IN_DMAP will check if DMAP address is mapped before returning true.
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*
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* PHYS_IN_DMAP_RANGE should only be used when a check on the address is
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* performed, e.g. by checking the physical address is within phys_avail,
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* or checking the virtual address is mapped.
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*/
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#define PHYS_IN_DMAP_RANGE(pa) ((pa) >= DMAP_MIN_PHYSADDR && \
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(pa) < DMAP_MAX_PHYSADDR)
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#define PHYS_IN_DMAP(pa) (PHYS_IN_DMAP_RANGE(pa) && \
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pmap_klookup(PHYS_TO_DMAP(pa), NULL))
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/* True if va is in the dmap range */
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#define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \
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(va) < (dmap_max_addr))
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#define PMAP_HAS_DMAP 1
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#define PHYS_TO_DMAP(pa) \
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({ \
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KASSERT(PHYS_IN_DMAP_RANGE(pa), \
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("%s: PA out of range, PA: 0x%lx", __func__, \
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(vm_paddr_t)(pa))); \
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((pa) - dmap_phys_base) + DMAP_MIN_ADDRESS; \
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})
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#define DMAP_TO_PHYS(va) \
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({ \
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KASSERT(VIRT_IN_DMAP(va), \
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("%s: VA out of range, VA: 0x%lx", __func__, \
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(vm_offset_t)(va))); \
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((va) - DMAP_MIN_ADDRESS) + dmap_phys_base; \
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})
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#define VM_MIN_USER_ADDRESS (0x0000000000000000UL)
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#define VM_MAX_USER_ADDRESS (0x0001000000000000UL)
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#define VM_MINUSER_ADDRESS (VM_MIN_USER_ADDRESS)
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#define VM_MAXUSER_ADDRESS (VM_MAX_USER_ADDRESS)
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#define KERNBASE (VM_MIN_KERNEL_ADDRESS)
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#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
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#define USRSTACK SHAREDPAGE
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/*
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* How many physical pages per kmem arena virtual page.
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*/
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#ifndef VM_KMEM_SIZE_SCALE
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#define VM_KMEM_SIZE_SCALE (1)
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#endif
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/*
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* Optional ceiling (in bytes) on the size of the kmem arena: 60% of the
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* kernel map.
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*/
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#ifndef VM_KMEM_SIZE_MAX
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#define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \
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VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5)
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#endif
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/*
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* Initial pagein size of beginning of executable file.
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*/
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#ifndef VM_INITIAL_PAGEIN
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#define VM_INITIAL_PAGEIN 16
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#endif
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#if !defined(KASAN) && !defined(KMSAN)
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#define UMA_USE_DMAP
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#endif
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#ifndef LOCORE
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extern vm_paddr_t dmap_phys_base;
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extern vm_paddr_t dmap_phys_max;
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extern vm_offset_t dmap_max_addr;
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#endif
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#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
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#define DEVMAP_MAX_VADDR VM_MAX_KERNEL_ADDRESS
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/*
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* The pmap can create non-transparent large page mappings.
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*/
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#define PMAP_HAS_LARGEPAGES 1
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/*
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* Need a page dump array for minidump.
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*/
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#define MINIDUMP_PAGE_TRACKING 1
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#define MINIDUMP_STARTUP_PAGE_TRACKING 1
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#endif /* !_MACHINE_VMPARAM_H_ */
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#endif /* !__arm__ */
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