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bianbu-linux-6.6/arch/m68k/include/asm
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Rick Edgecombe 2f0584f3f4 mm: Rename arch pte_mkwrite()'s to pte_mkwrite_novma() 
The x86 Shadow stack feature includes a new type of memory called shadow
stack. This shadow stack memory has some unusual properties, which requires
some core mm changes to function properly.

One of these unusual properties is that shadow stack memory is writable,
but only in limited ways. These limits are applied via a specific PTE
bit combination. Nevertheless, the memory is writable, and core mm code
will need to apply the writable permissions in the typical paths that
call pte_mkwrite(). The goal is to make pte_mkwrite() take a VMA, so
that the x86 implementation of it can know whether to create regular
writable or shadow stack mappings.

But there are a couple of challenges to this. Modifying the signatures of
each arch pte_mkwrite() implementation would be error prone because some
are generated with macros and would need to be re-implemented. Also, some
pte_mkwrite() callers operate on kernel memory without a VMA.

So this can be done in a three step process. First pte_mkwrite() can be
renamed to pte_mkwrite_novma() in each arch, with a generic pte_mkwrite()
added that just calls pte_mkwrite_novma(). Next callers without a VMA can
be moved to pte_mkwrite_novma(). And lastly, pte_mkwrite() and all callers
can be changed to take/pass a VMA.

Start the process by renaming pte_mkwrite() to pte_mkwrite_novma() and
adding the pte_mkwrite() wrapper in linux/pgtable.h. Apply the same
pattern for pmd_mkwrite(). Since not all archs have a pmd_mkwrite_novma(),
create a new arch config HAS_HUGE_PAGE that can be used to tell if
pmd_mkwrite() should be defined. Otherwise in the !HAS_HUGE_PAGE cases the
compiler would not be able to find pmd_mkwrite_novma().

No functional change.

Suggested-by: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/lkml/CAHk-=wiZjSu7c9sFYZb3q04108stgHff2wfbokGCCgW7riz+8Q@mail.gmail.com/
Link: https://lore.kernel.org/all/20230613001108.3040476-2-rick.p.edgecombe%40intel.com
2023-07-11 14:10:56 -07:00
..
adb_iop.h macintosh/adb-iop: Implement SRQ autopolling 2020-07-26 23:34:24 +10:00
amigahw.h m68k/UAPI: Move Amiga model/chipset definitions to <asm/bootinfo-amiga.h> 2013-11-26 11:09:17 +01:00
amigaints.h
amigayle.h m68k: amiga - Amiga Gayle IDE platform device conversion 2010-05-26 19:51:09 +02:00
amipcmcia.h
apollohw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
asm-offsets.h kbuild: move asm-offsets.h to include/generated 2009-12-12 13:08:14 +01:00
asm-prototypes.h m68k: Restore symbol versions for symbols exported from assembly 2017-08-21 11:52:55 +02:00
atari_joystick.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atari_stdma.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atari_stram.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atarihw.h m68k: atari: Rename shifter to shifter_st to avoid conflict 2019-08-19 13:24:10 +02:00
atariints.h m68k/atari: Remove obsolete IRQ_TYPE_* 2015-01-15 13:44:51 +01:00
atarikb.h input/atari: Use the correct mouse interrupt hook 2011-05-19 18:19:11 +02:00
atomic.h locking/atomic: m68k: add preprocessor symbols 2023-06-05 09:57:16 +02:00
bitops.h provide arch_test_bit_acquire for architectures that define test_bit 2022-08-27 09:49:54 -07:00
blinken.h m68k/hp300: Export hp300_ledstate 2011-12-10 19:52:48 +01:00
bootinfo.h m68k: generalize uboot command line support 2016-09-26 12:02:59 +10:00
bootstd.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bug.h bug.h: work around GCC PR82365 in BUG() 2018-02-21 15:35:43 -08:00
bvme6000hw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cache.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cacheflush.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cacheflush_mm.h Add linux/cacheflush.h 2021-11-17 10:36:15 -05:00
cacheflush_no.h m68knommu: use asm-generic/cacheflush.h 2020-06-08 11:05:57 -07:00
checksum.h saner calling conventions for csum_and_copy_..._user() 2020-08-20 15:45:15 -04:00
cmpxchg.h locking/arch: Rename all internal __xchg() names to __arch_xchg() 2023-04-29 09:08:44 +02:00
coldfire.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
config.h m68k: Introduce a virtual m68k machine 2022-04-11 11:48:01 +02:00
contregs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
current.h m68k: Implement "current_stack_pointer" 2022-02-26 20:32:03 -08:00
delay.h m68k: Implement ndelay() as an inline function to force type checking/casting 2018-05-22 10:31:52 +02:00
div64.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma.h PCI: Move isa_dma_bridge_buggy out of asm/dma.h 2022-07-22 17:24:47 -05:00
dsp56k.h
dvma.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
elf.h m68knommu: add definitions to support elf_fdpic program loader 2022-05-16 13:18:30 +10:00
entry.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fb.h arch/m68k: Implement <asm/fb.h> with generic helpers 2023-04-20 10:04:41 +02:00
fbio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
flat.h binfmt_flat: provide an asm-generic/flat.h 2019-06-24 09:16:47 +10:00
floppy.h floppy: use symbolic register names in the m68k port 2020-05-12 19:34:52 +03:00
fpu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ftrace.h
hash.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hp300hw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hwtest.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ide.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
idprom.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
intersil.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
io.h m68k: Introduce a virtual m68k machine 2022-04-11 11:48:01 +02:00
io_mm.h mm: remove xlate_dev_kmem_ptr() 2021-05-07 00:26:34 -07:00
io_no.h m68knommu: fix use of cpu_to_le() on IO access 2020-07-27 12:32:00 +10:00
irq.h m68k: Introduce a virtual m68k machine 2022-04-11 11:48:01 +02:00
irqflags.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kbuild kbuild: link symbol CRCs at final link, removing CONFIG_MODULE_REL_CRCS 2022-05-24 16:33:20 +09:00
kexec.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kmap.h remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
linkage.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m52xxacr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m53xxacr.h m68knommu: fix overwriting of bits in ColdFire V3 cache control 2020-07-27 12:32:00 +10:00
m53xxsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m54xxacr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m54xxgpt.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m54xxpci.h m68k: Fix typo 'COFNIG_MBAR' 2014-09-29 09:56:19 +10:00
m54xxsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m520xsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m523xsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m525xsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m527xsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m528xsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m5206sim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m5272sim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m5307sim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m5407sim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
m5441xsim.h m68k: m5441x: add flexcan support 2021-08-23 08:40:04 +10:00
mac_asc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mac_baboon.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mac_iop.h m68k updates for 4.15 2017-11-13 12:10:24 -08:00
mac_oss.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mac_psc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mac_via.h m68k: mac: Remove unused rbv_set_video_bpp() 2022-11-01 12:17:55 +01:00
machdep.h More power management updates for 5.19-rc1 2022-05-30 11:37:26 -07:00
machines.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
machw.h mac68k: replace mac68k SCC code with platform device 2010-02-27 18:31:09 +01:00
macintosh.h m68k: Prevent some compiler warnings in Coldfire builds 2019-08-19 13:24:10 +02:00
macints.h m68k/mac: Clean up unused timer definitions 2019-01-21 10:36:53 +01:00
math-emu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MC68EZ328.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MC68VZ328.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MC68328.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mc146818rtc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcf8390.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcf_pgalloc.h mm/thp: define default pmd_pgtable() 2021-07-01 11:06:03 -07:00
mcf_pgtable.h mm: Rename arch pte_mkwrite()'s to pte_mkwrite_novma() 2023-07-11 14:10:56 -07:00
mcfclk.h m68k: coldfire: remove private clk_get/clk_put 2021-06-08 17:00:09 +02:00
mcfdma.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcfgpio.h gpiolib: remove unused gpio_cansleep() 2023-06-13 16:49:23 +02:00
mcfintc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcfmmu.h m68k: move coldfire MMU initialization code 2017-11-06 08:25:20 +10:00
mcfpit.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcfqspi.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
mcfsim.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcfslt.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcftimer.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcfuart.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcfwdebug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmu.h m68knommu: use asm-generic/mmu.h for nommu setups 2022-05-16 13:18:30 +10:00
mmu_context.h m68k: allow pte_offset_map[_lock]() to fail 2023-06-19 16:19:06 -07:00
module.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
module.lds.h kbuild: preprocess module linker script 2020-09-25 00:36:41 +09:00
motorola_pgalloc.h mm/thp: define default pmd_pgtable() 2021-07-01 11:06:03 -07:00
motorola_pgtable.h mm: Rename arch pte_mkwrite()'s to pte_mkwrite_novma() 2023-07-11 14:10:56 -07:00
movs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mvme16xhw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mvme147hw.h m68k: mvme147,mvme16x: Don't wipe PCC timer config bits 2021-04-06 09:33:20 +02:00
natfeat.h m68k: replace gcc specific macros with ones from compiler.h 2017-02-24 17:46:56 -08:00
nettel.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nubus.h m68k: group io mapping definitions and functions 2018-05-28 09:45:26 +10:00
openprom.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
oplib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
page.h m68k: use asm-generic/memory_model.h for both MMU and !MMU 2023-02-09 16:51:40 -08:00
page_mm.h m68k/mm: Make pfn accessors static inlines 2023-05-29 11:27:08 +02:00
page_no.h m68k/mm: Make pfn accessors static inlines 2023-05-29 11:27:08 +02:00
page_offset.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
parport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci.h PCI: Remove pci_get_legacy_ide_irq() and asm-generic/pci.h 2022-07-22 17:23:45 -05:00
pgalloc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pgtable.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pgtable_mm.h mm: remove kern_addr_valid() completely 2022-11-08 17:37:18 -08:00
pgtable_no.h m68k/mm: remove dummy __swp definitions for nommu 2023-02-02 22:33:07 -08:00
processor.h kernel: exit: cleanup release_thread() 2022-09-11 21:55:07 -07:00
ptrace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
q40_master.h m68k: group io mapping definitions and functions 2018-05-28 09:45:26 +10:00
q40ints.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quicc_simple.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
raw_io.h m68k: atari: Make Atari ROM port I/O write macros return void 2022-05-22 12:24:14 +02:00
seccomp.h m68k: Add kernel seccomp support 2023-01-30 16:40:15 +01:00
serial.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
setup.h m68k: Introduce a virtual m68k machine 2022-04-11 11:48:01 +02:00
signal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smp.h
string.h m68k: remove broken strcmp implementation 2022-12-21 08:56:43 -08:00
sun3-head.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sun3_pgalloc.h mm/thp: define default pmd_pgtable() 2021-07-01 11:06:03 -07:00
sun3_pgtable.h mm: Rename arch pte_mkwrite()'s to pte_mkwrite_novma() 2023-07-11 14:10:56 -07:00
sun3ints.h
sun3mmu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sun3x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sun3xflop.h m68k: sun3x: Remove unneeded semicolon 2021-04-19 12:11:55 +02:00
sun3xprom.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
switch_to.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
syscall.h m68k: Add kernel seccomp support 2023-01-30 16:40:15 +01:00
thread_info.h m68k: Add kernel seccomp support 2023-01-30 16:40:15 +01:00
timex.h m68k: use fallback for random_get_entropy() instead of zero 2022-05-13 23:59:23 +02:00
tlb.h arch/tlb: Clean up simple architectures 2019-04-03 10:32:54 +02:00
tlbflush.h m68k: Remove set_fs() 2021-09-24 13:35:07 +02:00
traps.h m68k: Leave stack mangling to asm wrapper of sigreturn() 2021-09-24 13:35:03 +02:00
uaccess.h uaccess: generalize access_ok() 2022-02-25 09:36:05 +01:00
ucontext.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unistd.h m68k: Wire up clone3() syscall 2020-01-12 16:49:20 +01:00
user.h asm/user.h: killed unused macros 2022-01-30 21:17:00 -05:00
vga.h m68k: don't redefine access functions if we have PCI 2018-05-28 09:45:26 +10:00
virt.h m68k: Introduce a virtual m68k machine 2022-04-11 11:48:01 +02:00
virtconvert.h arch/*/: remove CONFIG_VIRT_TO_BUS 2022-06-28 13:20:21 +02:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00
zorro.h m68k: group io mapping definitions and functions 2018-05-28 09:45:26 +10:00