mm: rename GENERIC_PTDUMP and PTDUMP_CORE

Platforms subscribe into generic ptdump implementation via GENERIC_PTDUMP.
But generic ptdump gets enabled via PTDUMP_CORE. These configs
combination is co

mm: rename GENERIC_PTDUMP and PTDUMP_CORE

Platforms subscribe into generic ptdump implementation via GENERIC_PTDUMP.
But generic ptdump gets enabled via PTDUMP_CORE. These configs
combination is confusing as they sound very similar and does not
differentiate between platform's feature subscription and feature
enablement for ptdump. Rename the configs as ARCH_HAS_PTDUMP and PTDUMP
making it more clear and improve readability.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]> (powerpc)
Acked-by: Catalin Marinas <[email protected]> [arm64]
Cc: Will Deacon <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Steven Price <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

show more ...

powerpc/Makefile: Remove bits related to the previous use of -mcmodel=large

All supported compilers today (gcc v5.1+ and clang v11+) have support for
-mcmodel=medium. As such, NO_MINIMAL_TOC is no l

powerpc/Makefile: Remove bits related to the previous use of -mcmodel=large

All supported compilers today (gcc v5.1+ and clang v11+) have support for
-mcmodel=medium. As such, NO_MINIMAL_TOC is no longer being set. Remove
NO_MINIMAL_TOC as well as the fallback to -mminimal-toc.

Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Naveen N Rao <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://msgid.link/[email protected]

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powerpc/mm: Convert to default topdown mmap layout

Select CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT and
remove arch/powerpc/mm/mmap.c

This change reuses the generic framework added by
commit 67f

powerpc/mm: Convert to default topdown mmap layout

Select CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT and
remove arch/powerpc/mm/mmap.c

This change reuses the generic framework added by
commit 67f3977f805b ("arm64, mm: move generic mmap layout
functions to mm") without any functional change.

Comparison between powerpc implementation and the generic one:
- mmap_is_legacy() is identical.
- arch_mmap_rnd() does exactly the same allthough it's written
slightly differently.
- MIN_GAP and MAX_GAP are identical.
- mmap_base() does the same but uses STACK_RND_MASK which provides
the same values as stack_maxrandom_size().
- arch_pick_mmap_layout() is identical.

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/518f9def87d3c889d5958103e7463cf45a2f673d.1649523076.git.christophe.leroy@csgroup.eu

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powerpc/mm: Make slice specific to book3s/64

Since commit 555904d07eef ("powerpc/8xx: MM_SLICE is not needed
anymore") only book3s/64 selects CONFIG_PPC_MM_SLICES.

Move slice.c into mm/book3s64/

M

powerpc/mm: Make slice specific to book3s/64

Since commit 555904d07eef ("powerpc/8xx: MM_SLICE is not needed
anymore") only book3s/64 selects CONFIG_PPC_MM_SLICES.

Move slice.c into mm/book3s64/

Move necessary stuff in asm/book3s/64/slice.h and
remove asm/slice.h

Signed-off-by: Christophe Leroy <[email protected]>
Reviewed-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/4a0d74ef1966a5902b5fd4ac4b513a760a6d675a.1649523076.git.christophe.leroy@csgroup.eu

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powerpc/ptdump: Convert powerpc to GENERIC_PTDUMP

This patch converts powerpc to the generic PTDUMP implementation.

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Mich

powerpc/ptdump: Convert powerpc to GENERIC_PTDUMP

This patch converts powerpc to the generic PTDUMP implementation.

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/03166d569526be70214fe9370a7bad219d2f41c8.1625762907.git.christophe.leroy@csgroup.eu

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mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA

After removal of DISCINTIGMEM the NEED_MULTIPLE_NODES and NUMA
configuration options are equivalent.

Drop CONFIG_NEED_MULTIPLE_NODES and use

mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA

After removal of DISCINTIGMEM the NEED_MULTIPLE_NODES and NUMA
configuration options are equivalent.

Drop CONFIG_NEED_MULTIPLE_NODES and use CONFIG_NUMA instead.

Done with

$ sed -i 's/CONFIG_NEED_MULTIPLE_NODES/CONFIG_NUMA/' \
$(git grep -wl CONFIG_NEED_MULTIPLE_NODES)
$ sed -i 's/NEED_MULTIPLE_NODES/NUMA/' \
$(git grep -wl NEED_MULTIPLE_NODES)

with manual tweaks afterwards.

[[email protected]: fix arm boot crash]
Link: https://lkml.kernel.org/r/[email protected]

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Mike Rapoport <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Vineet Gupta <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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powerpc/mm: Implement set_memory() routines

The set_memory_{ro/rw/nx/x}() functions are required for
STRICT_MODULE_RWX, and are generally useful primitives to have. This
implementation is designed

powerpc/mm: Implement set_memory() routines

The set_memory_{ro/rw/nx/x}() functions are required for
STRICT_MODULE_RWX, and are generally useful primitives to have. This
implementation is designed to be generic across powerpc's many MMUs.
It's possible that this could be optimised to be faster for specific
MMUs.

This implementation does not handle cases where the caller is attempting
to change the mapping of the page it is executing from, or if another
CPU is concurrently using the page being altered. These cases likely
shouldn't happen, but a more complex implementation with MMU-specific code
could safely handle them.

On hash, the linear mapping is not kept in the linux pagetable, so this
will not change the protection if used on that range. Currently these
functions are not used on the linear map so just WARN for now.

apply_to_existing_page_range() does not work on huge pages so for now
disallow changing the protection of huge pages.

[jpn: - Allow set memory functions to be used without Strict RWX
- Hash: Disallow certain regions
- Have change_page_attr() take function pointers to manipulate ptes
- Radix: Add ptesync after set_pte_at()]

Signed-off-by: Russell Currey <[email protected]>
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Jordan Niethe <[email protected]>
Reviewed-by: Daniel Axtens <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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powerpc/mem: Move cache flushing functions into mm/cacheflush.c

Cache flushing functions are in the middle of completely
unrelated stuff in mm/mem.c

Create a dedicated mm/cacheflush.c for those fun

powerpc/mem: Move cache flushing functions into mm/cacheflush.c

Cache flushing functions are in the middle of completely
unrelated stuff in mm/mem.c

Create a dedicated mm/cacheflush.c for those functions.

Also cleanup the list of included headers.

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/7bf6f1600acad146e541a4e220940062f2e5b03d.1617895813.git.christophe.leroy@csgroup.eu

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powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()

Since commit c33165253492 ("powerpc: use non-set_fs based maccess
routines"), userspace access is not granted anymore whe

powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()

Since commit c33165253492 ("powerpc: use non-set_fs based maccess
routines"), userspace access is not granted anymore when using
copy_from_kernel_nofault()

However, kthread_probe_data() uses copy_from_kernel_nofault()
to check validity of pointers. When the pointer is NULL,
it points to userspace, leading to a KUAP fault and triggering
the following big hammer warning many times when you request
a sysrq "show task":

[ 1117.202054] ------------[ cut here ]------------
[ 1117.202102] Bug: fault blocked by AP register !
[ 1117.202261] WARNING: CPU: 0 PID: 377 at arch/powerpc/include/asm/nohash/32/kup-8xx.h:66 do_page_fault+0x4a8/0x5ec
[ 1117.202310] Modules linked in:
[ 1117.202428] CPU: 0 PID: 377 Comm: sh Tainted: G W 5.10.0-rc5-01340-g83f53be2de31-dirty #4175
[ 1117.202499] NIP: c0012048 LR: c0012048 CTR: 00000000
[ 1117.202573] REGS: cacdbb88 TRAP: 0700 Tainted: G W (5.10.0-rc5-01340-g83f53be2de31-dirty)
[ 1117.202625] MSR: 00021032 <ME,IR,DR,RI> CR: 24082222 XER: 20000000
[ 1117.202899]
[ 1117.202899] GPR00: c0012048 cacdbc40 c2929290 00000023 c092e554 00000001 c09865e8 c092e640
[ 1117.202899] GPR08: 00001032 00000000 00000000 00014efc 28082224 100d166a 100a0920 00000000
[ 1117.202899] GPR16: 100cac0c 100b0000 1080c3fc 1080d685 100d0000 100d0000 00000000 100a0900
[ 1117.202899] GPR24: 100d0000 c07892ec 00000000 c0921510 c21f4440 0000005c c0000000 cacdbc80
[ 1117.204362] NIP [c0012048] do_page_fault+0x4a8/0x5ec
[ 1117.204461] LR [c0012048] do_page_fault+0x4a8/0x5ec
[ 1117.204509] Call Trace:
[ 1117.204609] [cacdbc40] [c0012048] do_page_fault+0x4a8/0x5ec (unreliable)
[ 1117.204771] [cacdbc70] [c00112f0] handle_page_fault+0x8/0x34
[ 1117.204911] --- interrupt: 301 at copy_from_kernel_nofault+0x70/0x1c0
[ 1117.204979] NIP: c010dbec LR: c010dbac CTR: 00000001
[ 1117.205053] REGS: cacdbc80 TRAP: 0301 Tainted: G W (5.10.0-rc5-01340-g83f53be2de31-dirty)
[ 1117.205104] MSR: 00009032 <EE,ME,IR,DR,RI> CR: 28082224 XER: 00000000
[ 1117.205416] DAR: 0000005c DSISR: c0000000
[ 1117.205416] GPR00: c0045948 cacdbd38 c2929290 00000001 00000017 00000017 00000027 0000000f
[ 1117.205416] GPR08: c09926ec 00000000 00000000 3ffff000 24082224
[ 1117.206106] NIP [c010dbec] copy_from_kernel_nofault+0x70/0x1c0
[ 1117.206202] LR [c010dbac] copy_from_kernel_nofault+0x30/0x1c0
[ 1117.206258] --- interrupt: 301
[ 1117.206372] [cacdbd38] [c004bbb0] kthread_probe_data+0x44/0x70 (unreliable)
[ 1117.206561] [cacdbd58] [c0045948] print_worker_info+0xe0/0x194
[ 1117.206717] [cacdbdb8] [c00548ac] sched_show_task+0x134/0x168
[ 1117.206851] [cacdbdd8] [c005a268] show_state_filter+0x70/0x100
[ 1117.206989] [cacdbe08] [c039baa0] sysrq_handle_showstate+0x14/0x24
[ 1117.207122] [cacdbe18] [c039bf18] __handle_sysrq+0xac/0x1d0
[ 1117.207257] [cacdbe48] [c039c0c0] write_sysrq_trigger+0x4c/0x74
[ 1117.207407] [cacdbe68] [c01fba48] proc_reg_write+0xb4/0x114
[ 1117.207550] [cacdbe88] [c0179968] vfs_write+0x12c/0x478
[ 1117.207686] [cacdbf08] [c0179e60] ksys_write+0x78/0x128
[ 1117.207826] [cacdbf38] [c00110d0] ret_from_syscall+0x0/0x34
[ 1117.207938] --- interrupt: c01 at 0xfd4e784
[ 1117.208008] NIP: 0fd4e784 LR: 0fe0f244 CTR: 10048d38
[ 1117.208083] REGS: cacdbf48 TRAP: 0c01 Tainted: G W (5.10.0-rc5-01340-g83f53be2de31-dirty)
[ 1117.208134] MSR: 0000d032 <EE,PR,ME,IR,DR,RI> CR: 44002222 XER: 00000000
[ 1117.208470]
[ 1117.208470] GPR00: 00000004 7fc34090 77bfb4e0 00000001 1080fa40 00000002 7400000f fefefeff
[ 1117.208470] GPR08: 7f7f7f7f 10048d38 1080c414 7fc343c0 00000000
[ 1117.209104] NIP [0fd4e784] 0xfd4e784
[ 1117.209180] LR [0fe0f244] 0xfe0f244
[ 1117.209236] --- interrupt: c01
[ 1117.209274] Instruction dump:
[ 1117.209353] 714a4000 418200f0 73ca0001 40820084 73ca0032 408200f8 73c90040 4082ff60
[ 1117.209727] 0fe00000 3c60c082 386399f4 48013b65 <0fe00000> 80010034 3860000b 7c0803a6
[ 1117.210102] ---[ end trace 1927c0323393af3e ]---

To avoid that, copy_from_kernel_nofault_allowed() is used to check
whether the address is a valid kernel address. But the default
version of it returns true for any address.

Provide a powerpc version of copy_from_kernel_nofault_allowed()
that returns false when the address is below TASK_USER_MAX,
so that copy_from_kernel_nofault() will return -ERANGE.

Fixes: c33165253492 ("powerpc: use non-set_fs based maccess routines")
Reported-by: Qian Cai <[email protected]>
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/18bcb456d32a3e74f5ae241fd6f1580c092d07f5.1607360230.git.christophe.leroy@csgroup.eu

show more ...

powerpc/mm/highmem: Switch to generic kmap atomic

No reason having the same code in every architecture

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Michael Ellerman <[email protected]>

powerpc/mm/highmem: Switch to generic kmap atomic

No reason having the same code in every architecture

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

show more ...

powerpc/mm: Move ioremap functions out of pgtable_32/64.c

Create ioremap_32.c and ioremap_64.c and move respective ioremap
functions out of pgtable_32.c and pgtable_64.c

In the meantime, fix a few

powerpc/mm: Move ioremap functions out of pgtable_32/64.c

Create ioremap_32.c and ioremap_64.c and move respective ioremap
functions out of pgtable_32.c and pgtable_64.c

In the meantime, fix a few comments and changes a printk() to
pr_warn(). Also fix a few oversplitted lines.

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/b5c8b02ccefd4ede64c61b53cf64fb5dacb35740.1566309263.git.christophe.leroy@c-s.fr

show more ...

powerpc/mm: move common 32/64 bits ioremap functions into ioremap.c

ioremap(), ioremap_wc() and ioremap_coherent() are now identical on
PPC32 and PPC64 as iowa_is_active() will always return false o

powerpc/mm: move common 32/64 bits ioremap functions into ioremap.c

ioremap(), ioremap_wc() and ioremap_coherent() are now identical on
PPC32 and PPC64 as iowa_is_active() will always return false on
PPC32. Move them into a new common location called ioremap.c

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/6223803ce024d6ab4dfaa919f44098aed5b4bc33.1566309262.git.christophe.leroy@c-s.fr

show more ...

powerpc/mm: fix redundant inclusion of pgtable-frag.o in Makefile

The patch identified below added pgtable-frag.o to obj-y
but some merge witchery kept it also for obj-CONFIG_PPC_BOOK3S_64

This pat

powerpc/mm: fix redundant inclusion of pgtable-frag.o in Makefile

The patch identified below added pgtable-frag.o to obj-y
but some merge witchery kept it also for obj-CONFIG_PPC_BOOK3S_64

This patch clears the duplication.

Fixes: 737b434d3d55 ("powerpc/mm: convert Book3E 64 to pte_fragment")
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc/mm: Fix makefile for KASAN

In commit 17312f258cf6 ("powerpc/mm: Move book3s32 specifics in
subdirectory mm/book3s64"), ppc_mmu_32.c was moved and renamed.

This patch fixes Makefiles to disa

powerpc/mm: Fix makefile for KASAN

In commit 17312f258cf6 ("powerpc/mm: Move book3s32 specifics in
subdirectory mm/book3s64"), ppc_mmu_32.c was moved and renamed.

This patch fixes Makefiles to disable KASAN instrumentation on
the new name and location.

Fixes: f072015c7b74 ("powerpc: disable KASAN instrumentation on early/critical files.")
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc/32: Add KASAN support

This patch adds KASAN support for PPC32. The following patch
will add an early activation of hash table for book3s. Until
then, a warning will be raised if trying to us

powerpc/32: Add KASAN support

This patch adds KASAN support for PPC32. The following patch
will add an early activation of hash table for book3s. Until
then, a warning will be raised if trying to use KASAN on an
hash 6xx.

To support KASAN, this patch initialises that MMU mapings for
accessing to the KASAN shadow area defined in a previous patch.

An early mapping is set as soon as the kernel code has been
relocated at its definitive place.

Then the definitive mapping is set once paging is initialised.

For modules, the shadow area is allocated at module_alloc().

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc: disable KASAN instrumentation on early/critical files.

All files containing functions run before kasan_early_init() is called
must have KASAN instrumentation disabled.

For those file, bran

powerpc: disable KASAN instrumentation on early/critical files.

All files containing functions run before kasan_early_init() is called
must have KASAN instrumentation disabled.

For those file, branch profiling also have to be disabled otherwise
each if () generates a call to ftrace_likely_update().

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

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powerpc/mm: convert Book3E 64 to pte_fragment

Book3E 64 is the only subarch not using pte_fragment. In order
to allow refactorisation, this patch converts it to pte_fragment.

Reviewed-by: Aneesh Ku

powerpc/mm: convert Book3E 64 to pte_fragment

Book3E 64 is the only subarch not using pte_fragment. In order
to allow refactorisation, this patch converts it to pte_fragment.

Reviewed-by: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc/mm: make hugetlbpage.c depend on CONFIG_HUGETLB_PAGE

The only function in hugetlbpage.c which doesn't depend on
CONFIG_HUGETLB_PAGE is gup_hugepte(), and this function is
only called from gu

powerpc/mm: make hugetlbpage.c depend on CONFIG_HUGETLB_PAGE

The only function in hugetlbpage.c which doesn't depend on
CONFIG_HUGETLB_PAGE is gup_hugepte(), and this function is
only called from gup_huge_pd() which depends on
CONFIG_HUGETLB_PAGE so all the content of hugetlbpage.c
depends on CONFIG_HUGETLB_PAGE.

This patch modifies Makefile to only compile hugetlbpage.c
when CONFIG_HUGETLB_PAGE is set.

Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

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powerpc/mm: Move nohash specifics in subdirectory mm/nohash

Many files in arch/powerpc/mm are only for nohash. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <christoph

powerpc/mm: Move nohash specifics in subdirectory mm/nohash

Many files in arch/powerpc/mm are only for nohash. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <[email protected]>
[mpe: Shorten new filenames]
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc/mm: Move book3s32 specifics in subdirectory mm/book3s64

Several files in arch/powerpc/mm are only for book3S32. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <

powerpc/mm: Move book3s32 specifics in subdirectory mm/book3s64

Several files in arch/powerpc/mm are only for book3S32. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <[email protected]>
[mpe: Shorten new filenames]
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc/mm: Move book3s64 specifics in subdirectory mm/book3s64

Many files in arch/powerpc/mm are only for book3S64. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <chr

powerpc/mm: Move book3s64 specifics in subdirectory mm/book3s64

Many files in arch/powerpc/mm are only for book3S64. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <[email protected]>
[mpe: Update the selftest sym links, shorten new filenames, cleanup some
whitespace and formatting in the new files.]
Signed-off-by: Michael Ellerman <[email protected]>

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powerpc/mm: Disable kcov for SLB routines

The kcov instrumentation inside SLB routines causes duplicate SLB
entries to be added resulting into SLB multihit machine checks.
Disable kcov instrumentati

powerpc/mm: Disable kcov for SLB routines

The kcov instrumentation inside SLB routines causes duplicate SLB
entries to be added resulting into SLB multihit machine checks.
Disable kcov instrumentation on slb.o

Signed-off-by: Mahesh Salgaonkar <[email protected]>
Acked-by: Andrew Donnellan <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc: Enable kcov

kcov provides kernel coverage data that's useful for fuzzing tools like
syzkaller.

Wire up kcov support on powerpc. Disable kcov instrumentation on the same
files where we curr

powerpc: Enable kcov

kcov provides kernel coverage data that's useful for fuzzing tools like
syzkaller.

Wire up kcov support on powerpc. Disable kcov instrumentation on the same
files where we currently disable gcov and UBSan instrumentation, plus some
additional exclusions which appear necessary to boot on book3e machines.

Signed-off-by: Andrew Donnellan <[email protected]>
Acked-by: Dmitry Vyukov <[email protected]>
Tested-by: Daniel Axtens <[email protected]> # e6500
Signed-off-by: Michael Ellerman <[email protected]>

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powerpc: Move page table dump files in a dedicated subdirectory

This patch moves the files related to page table dump in a
dedicated subdirectory.

The purpose is to clean a bit arch/powerpc/mm by r

powerpc: Move page table dump files in a dedicated subdirectory

This patch moves the files related to page table dump in a
dedicated subdirectory.

The purpose is to clean a bit arch/powerpc/mm by regrouping
multiple files handling a dedicated function.

Signed-off-by: Christophe Leroy <[email protected]>
[mpe: Shorten the file names while we're at it]
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

powerpc/mm: dump block address translation on book3s/32

This patch adds a debugfs file to dump block address translation:

~# cat /sys/kernel/debug/powerpc/block_address_translation
---[ Instruction

powerpc/mm: dump block address translation on book3s/32

This patch adds a debugfs file to dump block address translation:

~# cat /sys/kernel/debug/powerpc/block_address_translation
---[ Instruction Block Address Translations ]---
0: -
1: -
2: 0xc0000000-0xcfffffff 0x00000000 Kernel EXEC coherent
3: 0xd0000000-0xdfffffff 0x10000000 Kernel EXEC coherent
4: -
5: -
6: -
7: -

---[ Data Block Address Translations ]---
0: -
1: -
2: 0xc0000000-0xcfffffff 0x00000000 Kernel RW coherent
3: 0xd0000000-0xdfffffff 0x10000000 Kernel RW coherent
4: -
5: -
6: -
7: -

Signed-off-by: Christophe Leroy <[email protected]>

Signed-off-by: Michael Ellerman <[email protected]>

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