linux-toradex.git/arch/mips/kernel/vpe.c, branch v6.7

Merge tag 'mips_6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

2023-04-28T00:46:52+00:00

Pull MIPS updates from Thomas Bogendoerfer:

 - added support for Huawei B593u-12

 - added support for virt board aligned to QEMU MIPS virt board

 - added support for doing DMA coherence on a per device base

 - reworked handling of RALINK SoCs

 - cleanup for Loongon64 barriers

 - removed deprecated support for MIPS_CMP SMP handling method

 - removed support Sibyte CARMEL and CHRINE boards

 - cleanups and fixes

* tag 'mips_6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (59 commits)
  MIPS: uprobes: Restore thread.trap_nr
  MIPS: Don't clear _PAGE_SPECIAL in _PAGE_CHG_MASK
  MIPS: Sink body of check_bugs_early() into its only call site
  MIPS: Mark check_bugs() as __init
  Revert "MIPS: generic: Enable all CPUs supported by virt board in Kconfig"
  MIPS: octeon_switch: Remove duplicated labels
  MIPS: loongson2ef: Add missing break in cs5536_isa
  MIPS: Remove set_swbp() in uprobes.c
  MIPS: Use def_bool y for ARCH_SUPPORTS_UPROBES
  MIPS: fw: Allow firmware to pass a empty env
  MIPS: Remove deprecated CONFIG_MIPS_CMP
  MIPS: lantiq: remove unused function declaration
  MIPS: Drop unused positional parameter in local_irq_{dis,en}able
  MIPS: mm: Remove local_cache_flush_page
  MIPS: Remove no longer used ide.h
  MIPS: mm: Remove unused *cache_page_indexed flush functions
  MIPS: generic: Enable all CPUs supported by virt board in Kconfig
  MIPS: Add board config for virt board
  MIPS: Octeon: Disable CVMSEG by default on other platforms
  MIPS: Loongson: Don't select platform features with CPU
  ...

MIPS: Remove deprecated CONFIG_MIPS_CMP

2023-04-12T13:01:09+00:00

Commit 5cac93b35c14 ("MIPS: Deprecate CONFIG_MIPS_CMP") deprecated
CONFIG_MIPS_CMP and after 9 years it's time to remove it.

Signed-off-by: Thomas Bogendoerfer 
Reviewed-by: Jiaxun Yang 
Acked-by: Marc Zyngier 
Reviewed-by: Philippe Mathieu-Daudé 
Signed-off-by: Thomas Bogendoerfer

module: fix MIPS module_layout -> module_memory

2023-03-09T20:55:15+00:00

Correct the struct's field/member name from mod_mem to mem.

Fixes this build error:
../arch/mips/kernel/vpe.c: In function 'vpe_elfload':
../arch/mips/kernel/vpe.c:643:41: error: 'struct module' has no member named 'mod_mem'
  643 |         v->load_addr = alloc_progmem(mod.mod_mem[MOD_TEXT].size);

Fixes: 2ece476a2346 ("module: replace module_layout with module_memory")
Signed-off-by: Randy Dunlap 
Cc: Song Liu 
Cc: Luis Chamberlain 
Cc: Thomas Bogendoerfer 
Cc: linux-mips@vger.kernel.org
Signed-off-by: Luis Chamberlain

module: replace module_layout with module_memory

2023-03-09T20:55:15+00:00

module_layout manages different types of memory (text, data, rodata, etc.)
in one allocation, which is problematic for some reasons:

1. It is hard to enable CONFIG_STRICT_MODULE_RWX.
2. It is hard to use huge pages in modules (and not break strict rwx).
3. Many archs uses module_layout for arch-specific data, but it is not
   obvious how these data are used (are they RO, RX, or RW?)

Improve the scenario by replacing 2 (or 3) module_layout per module with
up to 7 module_memory per module:

        MOD_TEXT,
        MOD_DATA,
        MOD_RODATA,
        MOD_RO_AFTER_INIT,
        MOD_INIT_TEXT,
        MOD_INIT_DATA,
        MOD_INIT_RODATA,

and allocating them separately. This adds slightly more entries to
mod_tree (from up to 3 entries per module, to up to 7 entries per
module). However, this at most adds a small constant overhead to
__module_address(), which is expected to be fast.

Various archs use module_layout for different data. These data are put
into different module_memory based on their location in module_layout.
IOW, data that used to go with text is allocated with MOD_MEM_TYPE_TEXT;
data that used to go with data is allocated with MOD_MEM_TYPE_DATA, etc.

module_memory simplifies quite some of the module code. For example,
ARCH_WANTS_MODULES_DATA_IN_VMALLOC is a lot cleaner, as it just uses a
different allocator for the data. kernel/module/strict_rwx.c is also
much cleaner with module_memory.

Signed-off-by: Song Liu 
Cc: Luis Chamberlain 
Cc: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Guenter Roeck 
Cc: Christophe Leroy 
Reviewed-by: Thomas Gleixner 
Reviewed-by: Christophe Leroy 
Reviewed-by: Luis Chamberlain 
Signed-off-by: Luis Chamberlain

MIPS: vpe: Remove vpe_getcwd

2021-01-27T20:49:16+00:00

I couldn't find any user of the dubious vpe_getcwd so far. So remove it and
get rid of another set_fs(KERNEL_DS).

Signed-off-by: Thomas Bogendoerfer

MIPS: VPE: Fix a double free and a memory leak in 'release_vpe()'

2020-02-15T20:44:03+00:00

Pointer on the memory allocated by 'alloc_progmem()' is stored in
'v->load_addr'. So this is this memory that should be freed by
'release_progmem()'.

'release_progmem()' is only a call to 'kfree()'.

With the current code, there is both a double free and a memory leak.
Fix it by passing the correct pointer to 'release_progmem()'.

Fixes: e01402b115ccc ("More AP / SP bits for the 34K, the Malta bits and things. Still wants")
Signed-off-by: Christophe JAILLET 
Signed-off-by: Paul Burton 
Cc: ralf@linux-mips.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org

mm: remove include/linux/bootmem.h

2018-10-31T15:54:16+00:00

Move remaining definitions and declarations from include/linux/bootmem.h
into include/linux/memblock.h and remove the redundant header.

The includes were replaced with the semantic patch below and then
semi-automated removal of duplicated '#include 

@@
@@
- #include 
+ #include 

[sfr@canb.auug.org.au: dma-direct: fix up for the removal of linux/bootmem.h]
  Link: http://lkml.kernel.org/r/20181002185342.133d1680@canb.auug.org.au
[sfr@canb.auug.org.au: powerpc: fix up for removal of linux/bootmem.h]
  Link: http://lkml.kernel.org/r/20181005161406.73ef8727@canb.auug.org.au
[sfr@canb.auug.org.au: x86/kaslr, ACPI/NUMA: fix for linux/bootmem.h removal]
  Link: http://lkml.kernel.org/r/20181008190341.5e396491@canb.auug.org.au
Link: http://lkml.kernel.org/r/1536927045-23536-30-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport 
Signed-off-by: Stephen Rothwell 
Acked-by: Michal Hocko 
Cc: Catalin Marinas 
Cc: Chris Zankel 
Cc: "David S. Miller" 
Cc: Geert Uytterhoeven 
Cc: Greentime Hu 
Cc: Greg Kroah-Hartman 
Cc: Guan Xuetao 
Cc: Ingo Molnar 
Cc: "James E.J. Bottomley" 
Cc: Jonas Bonn 
Cc: Jonathan Corbet 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Martin Schwidefsky 
Cc: Matt Turner 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Paul Burton 
Cc: Richard Kuo 
Cc: Richard Weinberger 
Cc: Rich Felker 
Cc: Russell King 
Cc: Serge Semin 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Vineet Gupta 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

MIPS: VPE: Fix spelling mistake: "uneeded" -> "unneeded"

2018-05-14T22:58:23+00:00

Trivial fix to spelling mistake in pr_warn message text.

Signed-off-by: Colin Ian King 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Cc: kernel-janitors@vger.kernel.org
Signed-off-by: James Hogan

module: use a structure to encapsulate layout.

2015-12-04T21:46:25+00:00

Makes it easier to handle init vs core cleanly, though the change is
fairly invasive across random architectures.

It simplifies the rbtree code immediately, however, while keeping the
core data together in the same cachline (now iff the rbtree code is
enabled).

Acked-by: Peter Zijlstra 
Reviewed-by: Josh Poimboeuf 
Signed-off-by: Rusty Russell 
Signed-off-by: Jiri Kosina

MIPS: MT: Remove "weak" from vpe_run() declaration

2015-08-26T13:23:40+00:00

Weak header file declarations are error-prone because they make every
definition weak, and the linker chooses one based on link order (see
10629d711ed7 ("PCI: Remove __weak annotation from pcibios_get_phb_of_node
decl")).

That's not a problem for vpe_run() because Kconfig ensures there's never
more than one definition:

  - vpe_run() is defined in arch/mips/kernel/vpe-mt.c if
    CONFIG_MIPS_VPE_LOADER_MT=y

  - vpe_run() is defined in arch/mips/mti-malta/malta-amon.c if
    CONFIG_MIPS_CMP=y

  - CONFIG_MIPS_VPE_LOADER_MT cannot be set if CONFIG_MIPS_CMP=y

But it's simpler to verify correctness if we remove "weak" from the picture
and test the config symbols directly.

Remove "weak" from the vpe_run() declaration and use #if to test whether a
definition should be present.

Signed-off-by: Bjorn Helgaas 
Cc: Andrew Bresticker 
Cc: linux-mips@linux-mips.org
Cc: James Hogan 
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10684/
Signed-off-by: Ralf Baechle