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92ceba94de6fb4cee2bf40b485979c342f44a492
linux/arch/alpha/lib/fpreg.c
Linus Torvalds 61307b7be4 Merge tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 
Pull mm updates from Andrew Morton:
 "The usual shower of singleton fixes and minor series all over MM,
  documented (hopefully adequately) in the respective changelogs.
  Notable series include:

   - Lucas Stach has provided some page-mapping cleanup/consolidation/
     maintainability work in the series "mm/treewide: Remove pXd_huge()
     API".

   - In the series "Allow migrate on protnone reference with
     MPOL_PREFERRED_MANY policy", Donet Tom has optimized mempolicy's
     MPOL_PREFERRED_MANY mode, yielding almost doubled performance in
     one test.

   - In their series "Memory allocation profiling" Kent Overstreet and
     Suren Baghdasaryan have contributed a means of determining (via
     /proc/allocinfo) whereabouts in the kernel memory is being
     allocated: number of calls and amount of memory.

   - Matthew Wilcox has provided the series "Various significant MM
     patches" which does a number of rather unrelated things, but in
     largely similar code sites.

   - In his series "mm: page_alloc: freelist migratetype hygiene"
     Johannes Weiner has fixed the page allocator's handling of
     migratetype requests, with resulting improvements in compaction
     efficiency.

   - In the series "make the hugetlb migration strategy consistent"
     Baolin Wang has fixed a hugetlb migration issue, which should
     improve hugetlb allocation reliability.

   - Liu Shixin has hit an I/O meltdown caused by readahead in a
     memory-tight memcg. Addressed in the series "Fix I/O high when
     memory almost met memcg limit".

   - In the series "mm/filemap: optimize folio adding and splitting"
     Kairui Song has optimized pagecache insertion, yielding ~10%
     performance improvement in one test.

   - Baoquan He has cleaned up and consolidated the early zone
     initialization code in the series "mm/mm_init.c: refactor
     free_area_init_core()".

   - Baoquan has also redone some MM initializatio code in the series
     "mm/init: minor clean up and improvement".

   - MM helper cleanups from Christoph Hellwig in his series "remove
     follow_pfn".

   - More cleanups from Matthew Wilcox in the series "Various
     page->flags cleanups".

   - Vlastimil Babka has contributed maintainability improvements in the
     series "memcg_kmem hooks refactoring".

   - More folio conversions and cleanups in Matthew Wilcox's series:
	"Convert huge_zero_page to huge_zero_folio"
	"khugepaged folio conversions"
	"Remove page_idle and page_young wrappers"
	"Use folio APIs in procfs"
	"Clean up __folio_put()"
	"Some cleanups for memory-failure"
	"Remove page_mapping()"
	"More folio compat code removal"

   - David Hildenbrand chipped in with "fs/proc/task_mmu: convert
     hugetlb functions to work on folis".

   - Code consolidation and cleanup work related to GUP's handling of
     hugetlbs in Peter Xu's series "mm/gup: Unify hugetlb, part 2".

   - Rick Edgecombe has developed some fixes to stack guard gaps in the
     series "Cover a guard gap corner case".

   - Jinjiang Tu has fixed KSM's behaviour after a fork+exec in the
     series "mm/ksm: fix ksm exec support for prctl".

   - Baolin Wang has implemented NUMA balancing for multi-size THPs.
     This is a simple first-cut implementation for now. The series is
     "support multi-size THP numa balancing".

   - Cleanups to vma handling helper functions from Matthew Wilcox in
     the series "Unify vma_address and vma_pgoff_address".

   - Some selftests maintenance work from Dev Jain in the series
     "selftests/mm: mremap_test: Optimizations and style fixes".

   - Improvements to the swapping of multi-size THPs from Ryan Roberts
     in the series "Swap-out mTHP without splitting".

   - Kefeng Wang has significantly optimized the handling of arm64's
     permission page faults in the series
	"arch/mm/fault: accelerate pagefault when badaccess"
	"mm: remove arch's private VM_FAULT_BADMAP/BADACCESS"

   - GUP cleanups from David Hildenbrand in "mm/gup: consistently call
     it GUP-fast".

   - hugetlb fault code cleanups from Vishal Moola in "Hugetlb fault
     path to use struct vm_fault".

   - selftests build fixes from John Hubbard in the series "Fix
     selftests/mm build without requiring "make headers"".

   - Memory tiering fixes/improvements from Ho-Ren (Jack) Chuang in the
     series "Improved Memory Tier Creation for CPUless NUMA Nodes".
     Fixes the initialization code so that migration between different
     memory types works as intended.

   - David Hildenbrand has improved follow_pte() and fixed an errant
     driver in the series "mm: follow_pte() improvements and acrn
     follow_pte() fixes".

   - David also did some cleanup work on large folio mapcounts in his
     series "mm: mapcount for large folios + page_mapcount() cleanups".

   - Folio conversions in KSM in Alex Shi's series "transfer page to
     folio in KSM".

   - Barry Song has added some sysfs stats for monitoring multi-size
     THP's in the series "mm: add per-order mTHP alloc and swpout
     counters".

   - Some zswap cleanups from Yosry Ahmed in the series "zswap
     same-filled and limit checking cleanups".

   - Matthew Wilcox has been looking at buffer_head code and found the
     documentation to be lacking. The series is "Improve buffer head
     documentation".

   - Multi-size THPs get more work, this time from Lance Yang. His
     series "mm/madvise: enhance lazyfreeing with mTHP in madvise_free"
     optimizes the freeing of these things.

   - Kemeng Shi has added more userspace-visible writeback
     instrumentation in the series "Improve visibility of writeback".

   - Kemeng Shi then sent some maintenance work on top in the series
     "Fix and cleanups to page-writeback".

   - Matthew Wilcox reduces mmap_lock traffic in the anon vma code in
     the series "Improve anon_vma scalability for anon VMAs". Intel's
     test bot reported an improbable 3x improvement in one test.

   - SeongJae Park adds some DAMON feature work in the series
	"mm/damon: add a DAMOS filter type for page granularity access recheck"
	"selftests/damon: add DAMOS quota goal test"

   - Also some maintenance work in the series
	"mm/damon/paddr: simplify page level access re-check for pageout"
	"mm/damon: misc fixes and improvements"

   - David Hildenbrand has disabled some known-to-fail selftests ni the
     series "selftests: mm: cow: flag vmsplice() hugetlb tests as
     XFAIL".

   - memcg metadata storage optimizations from Shakeel Butt in "memcg:
     reduce memory consumption by memcg stats".

   - DAX fixes and maintenance work from Vishal Verma in the series
     "dax/bus.c: Fixups for dax-bus locking""

* tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (426 commits)
  memcg, oom: cleanup unused memcg_oom_gfp_mask and memcg_oom_order
  selftests/mm: hugetlb_madv_vs_map: avoid test skipping by querying hugepage size at runtime
  mm/hugetlb: add missing VM_FAULT_SET_HINDEX in hugetlb_wp
  mm/hugetlb: add missing VM_FAULT_SET_HINDEX in hugetlb_fault
  selftests: cgroup: add tests to verify the zswap writeback path
  mm: memcg: make alloc_mem_cgroup_per_node_info() return bool
  mm/damon/core: fix return value from damos_wmark_metric_value
  mm: do not update memcg stats for NR_{FILE/SHMEM}_PMDMAPPED
  selftests: cgroup: remove redundant enabling of memory controller
  Docs/mm/damon/maintainer-profile: allow posting patches based on damon/next tree
  Docs/mm/damon/maintainer-profile: change the maintainer's timezone from PST to PT
  Docs/mm/damon/design: use a list for supported filters
  Docs/admin-guide/mm/damon/usage: fix wrong schemes effective quota update command
  Docs/admin-guide/mm/damon/usage: fix wrong example of DAMOS filter matching sysfs file
  selftests/damon: classify tests for functionalities and regressions
  selftests/damon/_damon_sysfs: use 'is' instead of '==' for 'None'
  selftests/damon/_damon_sysfs: find sysfs mount point from /proc/mounts
  selftests/damon/_damon_sysfs: check errors from nr_schemes file reads
  mm/damon/core: initialize ->esz_bp from damos_quota_init_priv()
  selftests/damon: add a test for DAMOS quota goal
  ...
2024-05-19 09:21:03 -07:00

235 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* arch/alpha/lib/fpreg.c
*
* (C) Copyright 1998 Linus Torvalds
*/
#include <linux/compiler.h>
#include <linux/export.h>
#include <linux/preempt.h>
#include <asm/fpu.h>
#include <asm/thread_info.h>
#include <asm/fpu.h>
#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
#define STT(reg,val) asm volatile ("ftoit $f"#reg",%0" : "=r"(val));
#else
#define STT(reg,val) asm volatile ("stt $f"#reg",%0" : "=m"(val));
#endif
unsigned long
alpha_read_fp_reg (unsigned long reg)
{
unsigned long val;
if (unlikely(reg >= 32))
return 0;
preempt_disable();
if (current_thread_info()->status & TS_SAVED_FP)
val = current_thread_info()->fp[reg];
else switch (reg) {
case 0: STT( 0, val); break;
case 1: STT( 1, val); break;
case 2: STT( 2, val); break;
case 3: STT( 3, val); break;
case 4: STT( 4, val); break;
case 5: STT( 5, val); break;
case 6: STT( 6, val); break;
case 7: STT( 7, val); break;
case 8: STT( 8, val); break;
case 9: STT( 9, val); break;
case 10: STT(10, val); break;
case 11: STT(11, val); break;
case 12: STT(12, val); break;
case 13: STT(13, val); break;
case 14: STT(14, val); break;
case 15: STT(15, val); break;
case 16: STT(16, val); break;
case 17: STT(17, val); break;
case 18: STT(18, val); break;
case 19: STT(19, val); break;
case 20: STT(20, val); break;
case 21: STT(21, val); break;
case 22: STT(22, val); break;
case 23: STT(23, val); break;
case 24: STT(24, val); break;
case 25: STT(25, val); break;
case 26: STT(26, val); break;
case 27: STT(27, val); break;
case 28: STT(28, val); break;
case 29: STT(29, val); break;
case 30: STT(30, val); break;
case 31: STT(31, val); break;
}
preempt_enable();
return val;
}
EXPORT_SYMBOL(alpha_read_fp_reg);
#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
#define LDT(reg,val) asm volatile ("itoft %0,$f"#reg : : "r"(val));
#else
#define LDT(reg,val) asm volatile ("ldt $f"#reg",%0" : : "m"(val));
#endif
void
alpha_write_fp_reg (unsigned long reg, unsigned long val)
{
if (unlikely(reg >= 32))
return;
preempt_disable();
if (current_thread_info()->status & TS_SAVED_FP) {
current_thread_info()->status |= TS_RESTORE_FP;
current_thread_info()->fp[reg] = val;
} else switch (reg) {
case 0: LDT( 0, val); break;
case 1: LDT( 1, val); break;
case 2: LDT( 2, val); break;
case 3: LDT( 3, val); break;
case 4: LDT( 4, val); break;
case 5: LDT( 5, val); break;
case 6: LDT( 6, val); break;
case 7: LDT( 7, val); break;
case 8: LDT( 8, val); break;
case 9: LDT( 9, val); break;
case 10: LDT(10, val); break;
case 11: LDT(11, val); break;
case 12: LDT(12, val); break;
case 13: LDT(13, val); break;
case 14: LDT(14, val); break;
case 15: LDT(15, val); break;
case 16: LDT(16, val); break;
case 17: LDT(17, val); break;
case 18: LDT(18, val); break;
case 19: LDT(19, val); break;
case 20: LDT(20, val); break;
case 21: LDT(21, val); break;
case 22: LDT(22, val); break;
case 23: LDT(23, val); break;
case 24: LDT(24, val); break;
case 25: LDT(25, val); break;
case 26: LDT(26, val); break;
case 27: LDT(27, val); break;
case 28: LDT(28, val); break;
case 29: LDT(29, val); break;
case 30: LDT(30, val); break;
case 31: LDT(31, val); break;
}
preempt_enable();
}
EXPORT_SYMBOL(alpha_write_fp_reg);
#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
#define STS(reg,val) asm volatile ("ftois $f"#reg",%0" : "=r"(val));
#else
#define STS(reg,val) asm volatile ("sts $f"#reg",%0" : "=m"(val));
#endif
unsigned long
alpha_read_fp_reg_s (unsigned long reg)
{
unsigned long val;
if (unlikely(reg >= 32))
return 0;
preempt_disable();
if (current_thread_info()->status & TS_SAVED_FP) {
LDT(0, current_thread_info()->fp[reg]);
STS(0, val);
} else switch (reg) {
case 0: STS( 0, val); break;
case 1: STS( 1, val); break;
case 2: STS( 2, val); break;
case 3: STS( 3, val); break;
case 4: STS( 4, val); break;
case 5: STS( 5, val); break;
case 6: STS( 6, val); break;
case 7: STS( 7, val); break;
case 8: STS( 8, val); break;
case 9: STS( 9, val); break;
case 10: STS(10, val); break;
case 11: STS(11, val); break;
case 12: STS(12, val); break;
case 13: STS(13, val); break;
case 14: STS(14, val); break;
case 15: STS(15, val); break;
case 16: STS(16, val); break;
case 17: STS(17, val); break;
case 18: STS(18, val); break;
case 19: STS(19, val); break;
case 20: STS(20, val); break;
case 21: STS(21, val); break;
case 22: STS(22, val); break;
case 23: STS(23, val); break;
case 24: STS(24, val); break;
case 25: STS(25, val); break;
case 26: STS(26, val); break;
case 27: STS(27, val); break;
case 28: STS(28, val); break;
case 29: STS(29, val); break;
case 30: STS(30, val); break;
case 31: STS(31, val); break;
}
preempt_enable();
return val;
}
EXPORT_SYMBOL(alpha_read_fp_reg_s);
#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
#define LDS(reg,val) asm volatile ("itofs %0,$f"#reg : : "r"(val));
#else
#define LDS(reg,val) asm volatile ("lds $f"#reg",%0" : : "m"(val));
#endif
void
alpha_write_fp_reg_s (unsigned long reg, unsigned long val)
{
if (unlikely(reg >= 32))
return;
preempt_disable();
if (current_thread_info()->status & TS_SAVED_FP) {
current_thread_info()->status |= TS_RESTORE_FP;
LDS(0, val);
STT(0, current_thread_info()->fp[reg]);
} else switch (reg) {
case 0: LDS( 0, val); break;
case 1: LDS( 1, val); break;
case 2: LDS( 2, val); break;
case 3: LDS( 3, val); break;
case 4: LDS( 4, val); break;
case 5: LDS( 5, val); break;
case 6: LDS( 6, val); break;
case 7: LDS( 7, val); break;
case 8: LDS( 8, val); break;
case 9: LDS( 9, val); break;
case 10: LDS(10, val); break;
case 11: LDS(11, val); break;
case 12: LDS(12, val); break;
case 13: LDS(13, val); break;
case 14: LDS(14, val); break;
case 15: LDS(15, val); break;
case 16: LDS(16, val); break;
case 17: LDS(17, val); break;
case 18: LDS(18, val); break;
case 19: LDS(19, val); break;
case 20: LDS(20, val); break;
case 21: LDS(21, val); break;
case 22: LDS(22, val); break;
case 23: LDS(23, val); break;
case 24: LDS(24, val); break;
case 25: LDS(25, val); break;
case 26: LDS(26, val); break;
case 27: LDS(27, val); break;
case 28: LDS(28, val); break;
case 29: LDS(29, val); break;
case 30: LDS(30, val); break;
case 31: LDS(31, val); break;
}
preempt_enable();
}
EXPORT_SYMBOL(alpha_write_fp_reg_s);
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