linux.git/arch/mips/include/asm/pgtable.h, branch v6.5

mm: add PTE pointer parameter to flush_tlb_fix_spurious_fault()

2023-03-28T23:20:12+00:00

s390 can do more fine-grained handling of spurious TLB protection faults,
when there also is the PTE pointer available.

Therefore, pass on the PTE pointer to flush_tlb_fix_spurious_fault() as an
additional parameter.

This will add no functional change to other architectures, but those with
private flush_tlb_fix_spurious_fault() implementations need to be made
aware of the new parameter.

Link: https://lkml.kernel.org/r/20230306161548.661740-1-gerald.schaefer@linux.ibm.com
Signed-off-by: Gerald Schaefer 
Reviewed-by: Alexander Gordeev 
Acked-by: Catalin Marinas 	[arm64]
Acked-by: Michael Ellerman 		[powerpc]
Acked-by: David Hildenbrand 
Cc: Anshuman Khandual 
Cc: Borislav Petkov (AMD) 
Cc: Christophe Leroy 
Cc: Dave Hansen 
Cc: Ingo Molnar 
Cc: Matthew Wilcox (Oracle) 
Cc: Nicholas Piggin 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleixner 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

mm: remove __HAVE_ARCH_PTE_SWP_EXCLUSIVE

2023-02-03T06:33:11+00:00

__HAVE_ARCH_PTE_SWP_EXCLUSIVE is now supported by all architectures that
support swp PTEs, so let's drop it.

Link: https://lkml.kernel.org/r/20230113171026.582290-27-david@redhat.com
Signed-off-by: David Hildenbrand 
Signed-off-by: Andrew Morton

mips/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE

2023-02-03T06:33:08+00:00

Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE.

On 64bit, steal one bit from the type.  Generic MM currently only uses 5
bits for the type (MAX_SWAPFILES_SHIFT), so the stolen bit is effectively
unused.

On 32bit we're able to locate unused bits.  As the PTE layout for 32 bit
is very confusing, document it a bit better.

While at it, mask the type in __swp_entry()/mk_swap_pte().

Link: https://lkml.kernel.org/r/20230113171026.582290-13-david@redhat.com
Signed-off-by: David Hildenbrand 
Cc: Thomas Bogendoerfer 
Signed-off-by: Andrew Morton

Merge branch 'mm-hotfixes-stable' into mm-stable

2022-11-30T22:58:42+00:00

mm: add dummy pmd_young() for architectures not having it

2022-11-30T22:49:41+00:00

In order to avoid #ifdeffery add a dummy pmd_young() implementation as a
fallback.  This is required for the later patch "mm: introduce
arch_has_hw_nonleaf_pmd_young()".

Link: https://lkml.kernel.org/r/fd3ac3cd-7349-6bbd-890a-71a9454ca0b3@suse.com
Signed-off-by: Juergen Gross 
Acked-by: Yu Zhao 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Cc: Geert Uytterhoeven 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: Sander Eikelenboom 
Cc: Thomas Gleixner 
Signed-off-by: Andrew Morton

mm: remove kern_addr_valid() completely

2022-11-09T01:37:18+00:00

Most architectures (except arm64/x86/sparc) simply return 1 for
kern_addr_valid(), which is only used in read_kcore(), and it calls
copy_from_kernel_nofault() which could check whether the address is a
valid kernel address.  So as there is no need for kern_addr_valid(), let's
remove it.

Link: https://lkml.kernel.org/r/20221018074014.185687-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang 
Acked-by: Geert Uytterhoeven 	[m68k]
Acked-by: Heiko Carstens 		[s390]
Acked-by: Christoph Hellwig 
Acked-by: Helge Deller 			[parisc]
Acked-by: Michael Ellerman 		[powerpc]
Acked-by: Guo Ren 			[csky]
Acked-by: Catalin Marinas 	[arm64]
Cc: Alexander Gordeev 
Cc: Andy Lutomirski 
Cc: Anton Ivanov 
Cc: 
Cc: Borislav Petkov 
Cc: Christian Borntraeger 
Cc: Christophe Leroy 
Cc: Chris Zankel 
Cc: Dave Hansen 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Greg Ungerer 
Cc: H. Peter Anvin 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Ivan Kokshaysky 
Cc: James Bottomley 
Cc: Johannes Berg 
Cc: Jonas Bonn 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michal Simek 
Cc: Nicholas Piggin 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Peter Zijlstra 
Cc: Richard Henderson 
Cc: Richard Weinberger 
Cc: Rich Felker 
Cc: Russell King 
Cc: Stafford Horne 
Cc: Stefan Kristiansson 
Cc: Sven Schnelle 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleixner 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Cc: Xuerui Wang 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton

mips/mm: enable ARCH_HAS_VM_GET_PAGE_PROT

2022-07-18T00:14:40+00:00

This enables ARCH_HAS_VM_GET_PAGE_PROT on the platform and exports
standard vm_get_page_prot() implementation via DECLARE_VM_GET_PAGE_PROT,
which looks up a private and static protection_map[] array.  Subsequently
all __SXXX and __PXXX macros can be dropped which are no longer needed.

Link: https://lkml.kernel.org/r/20220711070600.2378316-21-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual 
Cc: Thomas Bogendoerfer 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Cc: Catalin Marinas 
Cc: Christophe Leroy 
Cc: Christoph Hellwig 
Cc: Christoph Hellwig 
Cc: Chris Zankel 
Cc: "David S. Miller" 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Guo Ren 
Cc: Heiko Carstens 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: "James E.J. Bottomley" 
Cc: Jeff Dike 
Cc: Jonas Bonn 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Nicholas Piggin 
Cc: Palmer Dabbelt 
Cc: Paul Mackerras 
Cc: Paul Walmsley 
Cc: Richard Henderson 
Cc: Rich Felker 
Cc: Russell King 
Cc: Sam Ravnborg 
Cc: Stafford Horne 
Cc: Thomas Gleixner 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: WANG Xuerui 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton

mips: Make pmd_pfn() available in all configurations

2022-03-21T16:59:02+00:00

Whether or not the platform supports PMD sized pages, we need to
provide pmd_pfn() for an upcoming patch.

Signed-off-by: Matthew Wilcox (Oracle)

mips: fix HUGETLB function without THP enabled

2021-11-02T10:15:09+00:00

ltp test futex_wake04 without THP enabled leads to below bt:
  [] BUG+0x0/0x8
  [] internal_get_user_pages_fast+0x81c/0x820
  [] get_futex_key+0xa0/0x480
  [] futex_wait_setup+0x7c/0x1a8
  [] futex_wait+0x120/0x228
  [] do_futex+0x140/0xbd8
  [] sys_futex+0x10c/0x1c0
  [] syscall_common+0x34/0x58

Move pmd_write() and pmd_page() from TRANSPARENT_HUGEPAGE scope to
MIPS_HUGE_TLB_SUPPORT scope, because both THP and HUGETLB will need
them.

Signed-off-by: Zhaolong Zhang 
Signed-off-by: Thomas Bogendoerfer

MIPS: mm: Add prototype for function __update_cache

2021-01-22T10:34:52+00:00

This commit adds a prototype to fix error at W=1:

arch/mips/mm/cache.c:129:6: error: no previous prototype
for '__update_cache' [-Werror=missing-prototypes]

Signed-off-by: Yanteng Si 
Signed-off-by: Thomas Bogendoerfer