linux-stable.git/arch/nios2/include, branch v6.3

mm, arch: add generic implementation of pfn_valid() for FLATMEM

2023-02-10T00:51:41+00:00

Every architecture that supports FLATMEM memory model defines its own
version of pfn_valid() that essentially compares a pfn to max_mapnr.

Use mips/powerpc version implemented as static inline as a generic
implementation of pfn_valid() and drop its per-architecture definitions.

[rppt@kernel.org: fix the generic pfn_valid()]
  Link: https://lkml.kernel.org/r/Y9lg7R1Yd931C+y5@kernel.org
Link: https://lkml.kernel.org/r/20230129124235.209895-5-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) 
Acked-by: Arnd Bergmann 
Acked-by: Guo Ren 		[csky]
Acked-by: Huacai Chen 	[LoongArch]
Acked-by: Stafford Horne 	[OpenRISC]
Acked-by: Michael Ellerman 	[powerpc]
Reviewed-by: David Hildenbrand 
Tested-by: Conor Dooley 
Cc: Brian Cain 
Cc: "David S. Miller" 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Greg Ungerer 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Richard Weinberger 
Cc: Rich Felker 
Cc: Russell King 
Cc: Thomas Bogendoerfer 
Cc: Vineet Gupta 
Cc: WANG Xuerui 
Cc: Yoshinori Sato 
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

nios2/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE

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

Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by using the yet-unused bit
31.

Link: https://lkml.kernel.org/r/20230113171026.582290-15-david@redhat.com
Signed-off-by: David Hildenbrand 
Cc: Thomas Bogendoerfer 
Signed-off-by: Andrew Morton

nios2/mm: refactor swap PTE layout

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

nios2 disables swap for a good reason: it doesn't even provide sufficient
type bits as required by core MM.  However, swap entries are nowadays also
used for other purposes (migration entries, PTE markers, HWPoison, ...),
and accidential use could be problematic.

Let's properly use 5 bits for the swap type and document the layout.  Bits
26--31 should get ignored by hardware completely, so they can be used.

Link: https://lkml.kernel.org/r/20230113171026.582290-14-david@redhat.com
Signed-off-by: David Hildenbrand 
Cc: Dinh Nguyen 
Signed-off-by: Andrew Morton

MIPS&LoongArch&NIOS2: adjust prototypes of p?d_init()

2022-12-12T02:12:11+00:00

Patch series "mm/sparse-vmemmap: Generalise helpers and enable for
LoongArch", v14.

This series is in order to enable sparse-vmemmap for LoongArch.  But
LoongArch cannot use generic helpers directly because MIPS&LoongArch need
to call pgd_init()/pud_init()/pmd_init() when populating page tables.  So
we adjust the prototypes of p?d_init() to make generic helpers can call
them, then enable sparse-vmemmap with generic helpers, and to be further,
generalise vmemmap_populate_hugepages() for ARM64, X86 and LoongArch.


This patch (of 4):

We are preparing to add sparse vmemmap support to LoongArch.  MIPS and
LoongArch need to call pgd_init()/pud_init()/pmd_init() when populating
page tables, so adjust their prototypes to make generic helpers can call
them.

NIOS2 declares pmd_init() but doesn't use, just remove it to avoid build
errors.

Link: https://lkml.kernel.org/r/20221027125253.3458989-1-chenhuacai@loongson.cn
Link: https://lkml.kernel.org/r/20221027125253.3458989-2-chenhuacai@loongson.cn
Signed-off-by: Feiyang Chen 
Signed-off-by: Huacai Chen 
Reviewed-by: Jiaxun Yang 
Reviewed-by: Philippe Mathieu-Daudé 
Reviewed-by: Arnd Bergmann 
Cc: Andy Lutomirski 
Cc: Catalin Marinas 
Cc: Dave Hansen 
Cc: Dinh Nguyen 
Cc: Guo Ren 
Cc: Peter Zijlstra 
Cc: Thomas Bogendoerfer 
Cc: Will Deacon 
Cc: Xuefeng Li 
Cc: Xuerui Wang 
Cc: Min Zhou 
Cc: Muchun Song 
Signed-off-by: Andrew Morton

nios2: remove unused INIT_MMAP

2022-11-09T01:37:19+00:00

Patch series "mm: cleanup with VM_ACCESS_FLAGS".


This patch (of 5):

It seems that INIT_MMAP is gone in 2.4.10, not sure, anyways, it is
useless now, kill it.

Link: https://lkml.kernel.org/r/20221019034945.93081-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20221019034945.93081-2-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang 
Cc: Dinh Nguyen 
Cc: Dave Hansen 
Cc: Jarkko Sakkinen 
Cc: Kefeng Wang 
Cc: Alex Deucher 
Cc: "Christian König" 
Cc: Daniel Vetter 
Cc: David Airlie 
Cc: "Pan, Xinhui" 
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

kernel: exit: cleanup release_thread()

2022-09-12T04:55:07+00:00

Only x86 has own release_thread(), introduce a new weak release_thread()
function to clean empty definitions in other ARCHs.

Link: https://lkml.kernel.org/r/20220819014406.32266-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang 
Acked-by: Guo Ren 				[csky]
Acked-by: Russell King (Oracle) 
Acked-by: Geert Uytterhoeven 
Acked-by: Brian Cain 
Acked-by: Michael Ellerman 			[powerpc]
Acked-by: Stafford Horne 			[openrisc]
Acked-by: Catalin Marinas 		[arm64]
Acked-by: Huacai Chen 			[LoongArch]
Cc: Alexander Gordeev 
Cc: Anton Ivanov 
Cc: Borislav Petkov 
Cc: Christian Borntraeger 
Cc: Christophe Leroy 
Cc: Chris Zankel 
Cc: Dave Hansen 
Cc: "David S. Miller" 
Cc: Dinh Nguyen 
Cc: Guo Ren  [csky]
Cc: Heiko Carstens 
Cc: Helge Deller 
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: Richard Henderson 
Cc: Richard Weinberger 
Cc: Rich Felker 
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

nios2: add force_successful_syscall_return()

2022-08-15T16:25:32+00:00

If we use the ancient SysV syscall ABI, we'd better have tell the
kernel how to claim that a negative return value is a success.
Use ->orig_r2 for that - it's inaccessible via ptrace, so it's
a fair game for changes and it's normally[*] non-negative on return
from syscall.  Set to -1; syscall is not going to be restart-worthy
by definition, so we won't interfere with that use either.

[*] the only exception is rt_sigreturn(), where we skip the entire
messing with r1/r2 anyway.

Fixes: 82ed08dd1b0e ("nios2: Exception handling")
Signed-off-by: Al Viro 
Signed-off-by: Dinh Nguyen

nios2: page fault et.al. are not restartable syscalls...

2022-08-15T16:25:31+00:00

make sure that ->orig_r2 is negative for everything except
the syscalls.

Fixes: 82ed08dd1b0e ("nios2: Exception handling")
Signed-off-by: Al Viro 
Signed-off-by: Dinh Nguyen