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![Linus Torvalds](/assets/img/avatar_default.png)
Notable changes: - Support for 4PB user address space on 64-bit, opt-in via mmap(). - Removal of POWER4 support, which was accidentally broken in 2016 and no one noticed, and blocked use of some modern instructions. - Workarounds so that the hypervisor can enable Transactional Memory on Power9. - A series to disable the DAWR (Data Address Watchpoint Register) on Power9. - More information displayed in the meltdown/spectre_v1/v2 sysfs files. - A vpermxor (Power8 Altivec) implementation for the raid6 Q Syndrome. - A big series to make the allocation of our pacas (per cpu area), kernel page tables, and per-cpu stacks NUMA aware when using the Radix MMU on Power9. And as usual many fixes, reworks and cleanups. Thanks to: Aaro Koskinen, Alexandre Belloni, Alexey Kardashevskiy, Alistair Popple, Andy Shevchenko, Aneesh Kumar K.V, Anshuman Khandual, Balbir Singh, Benjamin Herrenschmidt, Christophe Leroy, Christophe Lombard, Cyril Bur, Daniel Axtens, Dave Young, Finn Thain, Frederic Barrat, Gustavo Romero, Horia Geantă, Jonathan Neuschäfer, Kees Cook, Larry Finger, Laurent Dufour, Laurent Vivier, Logan Gunthorpe, Madhavan Srinivasan, Mark Greer, Mark Hairgrove, Markus Elfring, Mathieu Malaterre, Matt Brown, Matt Evans, Mauricio Faria de Oliveira, Michael Neuling, Naveen N. Rao, Nicholas Piggin, Paul Mackerras, Philippe Bergheaud, Ram Pai, Rob Herring, Sam Bobroff, Segher Boessenkool, Simon Guo, Simon Horman, Stewart Smith, Sukadev Bhattiprolu, Suraj Jitindar Singh, Thiago Jung Bauermann, Vaibhav Jain, Vaidyanathan Srinivasan, Vasant Hegde, Wei Yongjun. -----BEGIN PGP SIGNATURE----- iQIwBAABCAAaBQJayKxDExxtcGVAZWxsZXJtYW4uaWQuYXUACgkQUevqPMjhpYAr JQ/6A9Xs4zHDn9OeT9esEIxciETqUlrP0Wp64c4JVC7EkG1E7xRDZ4Xb4m8R2nNt 9sPhtNO1yCtEk6kFQtPNB0N8v6pud4I6+aMcYnn+tP8mJRYQ4x9bYaF3Hw98IKmE Kd6TglmsUQvh2GpwPiF93KpzzWu1HB2kZzzqJcAMTMh7C79Qz00BjrTJltzXB2jx tJ+B4lVy8BeU8G5nDAzJEEwb5Ypkn8O40rS/lpAwVTYOBJ8Rbyq8Fj82FeREK9YO 4EGaEKPkC/FdzX7OJV3v2/nldCd8pzV471fAoGuBUhJiJBMBoBybcTHIdDex7LlL zMLV1mUtGo8iolRPhL8iCH+GGifZz2WzstYCozz7hgIraWtc/frq9rZp6q0LdH/K trk7UbPGlVb92ecWZVpZyEcsMzKrCgZqnAe9wRNh1uEKScEdzd/bmRaMhENUObRh Hili6AVvmSKExpy7k2sZP/oUMaeC15/xz8Lk7l8a/iCkYhNmPYh5iSXM5+UKpcRT FYOcO0o3DwXsN46Whow3nJ7TqAsDy9/ecPUG71JQi3ZrHnRrm8jxkn8MCG5pZ1Fi KvKDxlg6RiJo3DF9/fSOpJUokvMwqBS5dJo4eh5eiDy94aBTqmBKFecvPxQm7a0L l3uXCF/6JuXEvMukFjGBO4RiYhw8i+B2uKsh81XUh7HKrgE= =HAB1 -----END PGP SIGNATURE----- Merge tag 'powerpc-4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Notable changes: - Support for 4PB user address space on 64-bit, opt-in via mmap(). - Removal of POWER4 support, which was accidentally broken in 2016 and no one noticed, and blocked use of some modern instructions. - Workarounds so that the hypervisor can enable Transactional Memory on Power9. - A series to disable the DAWR (Data Address Watchpoint Register) on Power9. - More information displayed in the meltdown/spectre_v1/v2 sysfs files. - A vpermxor (Power8 Altivec) implementation for the raid6 Q Syndrome. - A big series to make the allocation of our pacas (per cpu area), kernel page tables, and per-cpu stacks NUMA aware when using the Radix MMU on Power9. And as usual many fixes, reworks and cleanups. Thanks to: Aaro Koskinen, Alexandre Belloni, Alexey Kardashevskiy, Alistair Popple, Andy Shevchenko, Aneesh Kumar K.V, Anshuman Khandual, Balbir Singh, Benjamin Herrenschmidt, Christophe Leroy, Christophe Lombard, Cyril Bur, Daniel Axtens, Dave Young, Finn Thain, Frederic Barrat, Gustavo Romero, Horia Geantă, Jonathan Neuschäfer, Kees Cook, Larry Finger, Laurent Dufour, Laurent Vivier, Logan Gunthorpe, Madhavan Srinivasan, Mark Greer, Mark Hairgrove, Markus Elfring, Mathieu Malaterre, Matt Brown, Matt Evans, Mauricio Faria de Oliveira, Michael Neuling, Naveen N. Rao, Nicholas Piggin, Paul Mackerras, Philippe Bergheaud, Ram Pai, Rob Herring, Sam Bobroff, Segher Boessenkool, Simon Guo, Simon Horman, Stewart Smith, Sukadev Bhattiprolu, Suraj Jitindar Singh, Thiago Jung Bauermann, Vaibhav Jain, Vaidyanathan Srinivasan, Vasant Hegde, Wei Yongjun" * tag 'powerpc-4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (207 commits) powerpc/64s/idle: Fix restore of AMOR on POWER9 after deep sleep powerpc/64s: Fix POWER9 DD2.2 and above in cputable features powerpc/64s: Fix pkey support in dt_cpu_ftrs, add CPU_FTR_PKEY bit powerpc/64s: Fix dt_cpu_ftrs to have restore_cpu clear unwanted LPCR bits Revert "powerpc/64s/idle: POWER9 ESL=0 stop avoid save/restore overhead" powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi_lo} powerpc: io.h: move iomap.h include so that it can use readq/writeq defs cxl: Fix possible deadlock when processing page faults from cxllib powerpc/hw_breakpoint: Only disable hw breakpoint if cpu supports it powerpc/mm/radix: Update command line parsing for disable_radix powerpc/mm/radix: Parse disable_radix commandline correctly. powerpc/mm/hugetlb: initialize the pagetable cache correctly for hugetlb powerpc/mm/radix: Update pte fragment count from 16 to 256 on radix powerpc/mm/keys: Update documentation and remove unnecessary check powerpc/64s/idle: POWER9 ESL=0 stop avoid save/restore overhead powerpc/64s/idle: Consolidate power9_offline_stop()/power9_idle_stop() powerpc/powernv: Always stop secondaries before reboot/shutdown powerpc: hard disable irqs in smp_send_stop loop powerpc: use NMI IPI for smp_send_stop powerpc/powernv: Fix SMT4 forcing idle code ...
431 lines
14 KiB
C
431 lines
14 KiB
C
#ifndef _LINUX_MEMBLOCK_H
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#define _LINUX_MEMBLOCK_H
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#ifdef __KERNEL__
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#ifdef CONFIG_HAVE_MEMBLOCK
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/*
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* Logical memory blocks.
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*
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* Copyright (C) 2001 Peter Bergner, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/mm.h>
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#define INIT_MEMBLOCK_REGIONS 128
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#define INIT_PHYSMEM_REGIONS 4
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/* Definition of memblock flags. */
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enum {
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MEMBLOCK_NONE = 0x0, /* No special request */
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MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
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MEMBLOCK_MIRROR = 0x2, /* mirrored region */
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MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
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};
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struct memblock_region {
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phys_addr_t base;
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phys_addr_t size;
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unsigned long flags;
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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int nid;
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#endif
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};
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struct memblock_type {
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unsigned long cnt; /* number of regions */
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unsigned long max; /* size of the allocated array */
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phys_addr_t total_size; /* size of all regions */
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struct memblock_region *regions;
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char *name;
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};
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struct memblock {
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bool bottom_up; /* is bottom up direction? */
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phys_addr_t current_limit;
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struct memblock_type memory;
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struct memblock_type reserved;
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#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
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struct memblock_type physmem;
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#endif
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};
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extern struct memblock memblock;
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extern int memblock_debug;
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#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
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#define __init_memblock __meminit
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#define __initdata_memblock __meminitdata
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void memblock_discard(void);
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#else
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#define __init_memblock
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#define __initdata_memblock
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#endif
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#define memblock_dbg(fmt, ...) \
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if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
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phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
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phys_addr_t start, phys_addr_t end,
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int nid, ulong flags);
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phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
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phys_addr_t size, phys_addr_t align);
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void memblock_allow_resize(void);
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int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
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int memblock_add(phys_addr_t base, phys_addr_t size);
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int memblock_remove(phys_addr_t base, phys_addr_t size);
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int memblock_free(phys_addr_t base, phys_addr_t size);
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int memblock_reserve(phys_addr_t base, phys_addr_t size);
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void memblock_trim_memory(phys_addr_t align);
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bool memblock_overlaps_region(struct memblock_type *type,
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phys_addr_t base, phys_addr_t size);
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int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
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int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
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int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
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int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
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int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
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ulong choose_memblock_flags(void);
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/* Low level functions */
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int memblock_add_range(struct memblock_type *type,
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phys_addr_t base, phys_addr_t size,
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int nid, unsigned long flags);
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void __next_mem_range(u64 *idx, int nid, ulong flags,
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struct memblock_type *type_a,
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struct memblock_type *type_b, phys_addr_t *out_start,
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phys_addr_t *out_end, int *out_nid);
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void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
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struct memblock_type *type_a,
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struct memblock_type *type_b, phys_addr_t *out_start,
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phys_addr_t *out_end, int *out_nid);
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void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
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phys_addr_t *out_end);
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void __memblock_free_early(phys_addr_t base, phys_addr_t size);
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void __memblock_free_late(phys_addr_t base, phys_addr_t size);
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/**
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* for_each_mem_range - iterate through memblock areas from type_a and not
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* included in type_b. Or just type_a if type_b is NULL.
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* @i: u64 used as loop variable
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* @type_a: ptr to memblock_type to iterate
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* @type_b: ptr to memblock_type which excludes from the iteration
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*/
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#define for_each_mem_range(i, type_a, type_b, nid, flags, \
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p_start, p_end, p_nid) \
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for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
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p_start, p_end, p_nid); \
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i != (u64)ULLONG_MAX; \
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__next_mem_range(&i, nid, flags, type_a, type_b, \
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p_start, p_end, p_nid))
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/**
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* for_each_mem_range_rev - reverse iterate through memblock areas from
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* type_a and not included in type_b. Or just type_a if type_b is NULL.
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* @i: u64 used as loop variable
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* @type_a: ptr to memblock_type to iterate
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* @type_b: ptr to memblock_type which excludes from the iteration
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*/
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#define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
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p_start, p_end, p_nid) \
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for (i = (u64)ULLONG_MAX, \
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__next_mem_range_rev(&i, nid, flags, type_a, type_b,\
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p_start, p_end, p_nid); \
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i != (u64)ULLONG_MAX; \
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__next_mem_range_rev(&i, nid, flags, type_a, type_b, \
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p_start, p_end, p_nid))
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/**
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* for_each_reserved_mem_region - iterate over all reserved memblock areas
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* @i: u64 used as loop variable
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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*
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* Walks over reserved areas of memblock. Available as soon as memblock
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* is initialized.
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*/
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#define for_each_reserved_mem_region(i, p_start, p_end) \
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for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \
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i != (u64)ULLONG_MAX; \
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__next_reserved_mem_region(&i, p_start, p_end))
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static inline bool memblock_is_hotpluggable(struct memblock_region *m)
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{
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return m->flags & MEMBLOCK_HOTPLUG;
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}
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static inline bool memblock_is_mirror(struct memblock_region *m)
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{
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return m->flags & MEMBLOCK_MIRROR;
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}
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static inline bool memblock_is_nomap(struct memblock_region *m)
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{
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return m->flags & MEMBLOCK_NOMAP;
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}
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
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unsigned long *end_pfn);
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void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
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unsigned long *out_end_pfn, int *out_nid);
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/**
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* for_each_mem_pfn_range - early memory pfn range iterator
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* @i: an integer used as loop variable
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* @nid: node selector, %MAX_NUMNODES for all nodes
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* @p_start: ptr to ulong for start pfn of the range, can be %NULL
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* @p_end: ptr to ulong for end pfn of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*
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* Walks over configured memory ranges.
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*/
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#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
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for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
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i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
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#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
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/**
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* for_each_free_mem_range - iterate through free memblock areas
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* @i: u64 used as loop variable
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*
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* Walks over free (memory && !reserved) areas of memblock. Available as
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* soon as memblock is initialized.
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*/
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#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
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for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
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nid, flags, p_start, p_end, p_nid)
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/**
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* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
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* @i: u64 used as loop variable
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* @nid: node selector, %NUMA_NO_NODE for all nodes
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*
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* Walks over free (memory && !reserved) areas of memblock in reverse
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* order. Available as soon as memblock is initialized.
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*/
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#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
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p_nid) \
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for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
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nid, flags, p_start, p_end, p_nid)
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/**
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* for_each_resv_unavail_range - iterate through reserved and unavailable memory
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* @i: u64 used as loop variable
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* @flags: pick from blocks based on memory attributes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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*
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* Walks over unavailable but reserved (reserved && !memory) areas of memblock.
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* Available as soon as memblock is initialized.
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* Note: because this memory does not belong to any physical node, flags and
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* nid arguments do not make sense and thus not exported as arguments.
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*/
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#define for_each_resv_unavail_range(i, p_start, p_end) \
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for_each_mem_range(i, &memblock.reserved, &memblock.memory, \
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NUMA_NO_NODE, MEMBLOCK_NONE, p_start, p_end, NULL)
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static inline void memblock_set_region_flags(struct memblock_region *r,
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unsigned long flags)
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{
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r->flags |= flags;
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}
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static inline void memblock_clear_region_flags(struct memblock_region *r,
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unsigned long flags)
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{
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r->flags &= ~flags;
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}
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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int memblock_set_node(phys_addr_t base, phys_addr_t size,
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struct memblock_type *type, int nid);
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static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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{
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r->nid = nid;
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}
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static inline int memblock_get_region_node(const struct memblock_region *r)
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{
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return r->nid;
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}
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#else
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static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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{
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}
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static inline int memblock_get_region_node(const struct memblock_region *r)
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{
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return 0;
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}
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#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
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phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
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phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
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phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
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/*
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* Set the allocation direction to bottom-up or top-down.
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*/
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static inline void __init memblock_set_bottom_up(bool enable)
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{
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memblock.bottom_up = enable;
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}
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/*
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* Check if the allocation direction is bottom-up or not.
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* if this is true, that said, memblock will allocate memory
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* in bottom-up direction.
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*/
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static inline bool memblock_bottom_up(void)
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{
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return memblock.bottom_up;
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}
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/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
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#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
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#define MEMBLOCK_ALLOC_ACCESSIBLE 0
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phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
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phys_addr_t start, phys_addr_t end,
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ulong flags);
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phys_addr_t memblock_alloc_base_nid(phys_addr_t size,
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phys_addr_t align, phys_addr_t max_addr,
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int nid, ulong flags);
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phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
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phys_addr_t max_addr);
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phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
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|
phys_addr_t max_addr);
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|
phys_addr_t memblock_phys_mem_size(void);
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phys_addr_t memblock_reserved_size(void);
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phys_addr_t memblock_mem_size(unsigned long limit_pfn);
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phys_addr_t memblock_start_of_DRAM(void);
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phys_addr_t memblock_end_of_DRAM(void);
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void memblock_enforce_memory_limit(phys_addr_t memory_limit);
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void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
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void memblock_mem_limit_remove_map(phys_addr_t limit);
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bool memblock_is_memory(phys_addr_t addr);
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|
bool memblock_is_map_memory(phys_addr_t addr);
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bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
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bool memblock_is_reserved(phys_addr_t addr);
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bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
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|
|
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extern void __memblock_dump_all(void);
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|
|
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static inline void memblock_dump_all(void)
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|
{
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if (memblock_debug)
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__memblock_dump_all();
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}
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|
|
|
/**
|
|
* memblock_set_current_limit - Set the current allocation limit to allow
|
|
* limiting allocations to what is currently
|
|
* accessible during boot
|
|
* @limit: New limit value (physical address)
|
|
*/
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|
void memblock_set_current_limit(phys_addr_t limit);
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|
|
|
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phys_addr_t memblock_get_current_limit(void);
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|
|
|
/*
|
|
* pfn conversion functions
|
|
*
|
|
* While the memory MEMBLOCKs should always be page aligned, the reserved
|
|
* MEMBLOCKs may not be. This accessor attempt to provide a very clear
|
|
* idea of what they return for such non aligned MEMBLOCKs.
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|
*/
|
|
|
|
/**
|
|
* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
|
|
* @reg: memblock_region structure
|
|
*/
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|
static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
|
|
{
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|
return PFN_UP(reg->base);
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|
}
|
|
|
|
/**
|
|
* memblock_region_memory_end_pfn - Return the end_pfn this region
|
|
* @reg: memblock_region structure
|
|
*/
|
|
static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
|
|
{
|
|
return PFN_DOWN(reg->base + reg->size);
|
|
}
|
|
|
|
/**
|
|
* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
|
|
* @reg: memblock_region structure
|
|
*/
|
|
static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
|
|
{
|
|
return PFN_DOWN(reg->base);
|
|
}
|
|
|
|
/**
|
|
* memblock_region_reserved_end_pfn - Return the end_pfn this region
|
|
* @reg: memblock_region structure
|
|
*/
|
|
static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
|
|
{
|
|
return PFN_UP(reg->base + reg->size);
|
|
}
|
|
|
|
#define for_each_memblock(memblock_type, region) \
|
|
for (region = memblock.memblock_type.regions; \
|
|
region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
|
|
region++)
|
|
|
|
#define for_each_memblock_type(i, memblock_type, rgn) \
|
|
for (i = 0, rgn = &memblock_type->regions[0]; \
|
|
i < memblock_type->cnt; \
|
|
i++, rgn = &memblock_type->regions[i])
|
|
|
|
#ifdef CONFIG_MEMTEST
|
|
extern void early_memtest(phys_addr_t start, phys_addr_t end);
|
|
#else
|
|
static inline void early_memtest(phys_addr_t start, phys_addr_t end)
|
|
{
|
|
}
|
|
#endif
|
|
#else
|
|
static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_HAVE_MEMBLOCK */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_MEMBLOCK_H */
|