mirror of https://gitee.com/openkylin/linux.git
1027 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Kees Cook
|
3404be67bf |
mm/slab: expand CONFIG_SLAB_FREELIST_HARDENED to include SLAB
Patch series "mm: Expand CONFIG_SLAB_FREELIST_HARDENED to include SLAB"
In reviewing Vlastimil Babka's latest slub debug series, I realized[1]
that several checks under CONFIG_SLAB_FREELIST_HARDENED weren't being
applied to SLAB. Fix this by expanding the Kconfig coverage, and adding a
simple double-free test for SLAB.
This patch (of 2):
Include SLAB caches when performing kmem_cache pointer verification. A
defense against such corruption[1] should be applied to all the
allocators. With this added, the "SLAB_FREE_CROSS" and "SLAB_FREE_PAGE"
LKDTM tests now pass on SLAB:
lkdtm: Performing direct entry SLAB_FREE_CROSS
lkdtm: Attempting cross-cache slab free ...
------------[ cut here ]------------
cache_from_obj: Wrong slab cache. lkdtm-heap-b but object is from lkdtm-heap-a
WARNING: CPU: 2 PID: 2195 at mm/slab.h:530 kmem_cache_free+0x8d/0x1d0
...
lkdtm: Performing direct entry SLAB_FREE_PAGE
lkdtm: Attempting non-Slab slab free ...
------------[ cut here ]------------
virt_to_cache: Object is not a Slab page!
WARNING: CPU: 1 PID: 2202 at mm/slab.h:489 kmem_cache_free+0x196/0x1d0
Additionally clean up neighboring Kconfig entries for clarity,
readability, and redundant option removal.
[1] https://github.com/ThomasKing2014/slides/raw/master/Building%20universal%20Android%20rooting%20with%20a%20type%20confusion%20vulnerability.pdf
Fixes:
|
|
|
Linus Torvalds
|
2324d50d05 |
It's been a busy cycle for documentation - hopefully the busiest for a
while to come. Changes include:
- Some new Chinese translations
- Progress on the battle against double words words and non-HTTPS URLs
- Some block-mq documentation
- More RST conversions from Mauro. At this point, that task is
essentially complete, so we shouldn't see this kind of churn again for a
while. Unless we decide to switch to asciidoc or something...:)
- Lots of typo fixes, warning fixes, and more.
-----BEGIN PGP SIGNATURE-----
iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAl8oVkwPHGNvcmJldEBs
d24ubmV0AAoJEBdDWhNsDH5YoW8H/jJ/xnXFn7tkgVPQAlL3k5HCnK7A5nDP9RVR
cg1pTx1cEFdjzxPlJyExU6/v+AImOvtweHXC+JDK7YcJ6XFUNYXJI3LxL5KwUXbY
BL/xRFszDSXH2C7SJF5GECcFYp01e/FWSLN3yWAh+g+XwsKiTJ8q9+CoIDkHfPGO
7oQsHKFu6s36Af0LfSgxk4sVB7EJbo8e4psuPsP5SUrl+oXRO43Put0rXkR4yJoH
9oOaB51Do5fZp8I4JVAqGXvpXoExyLMO4yw0mASm6YSZ3KyjR8Fae+HD9Cq4ZuwY
0uzb9K+9NEhqbfwtyBsi99S64/6Zo/MonwKwevZuhtsDTK4l4iU=
=JQLZ
-----END PGP SIGNATURE-----
Merge tag 'docs-5.9' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"It's been a busy cycle for documentation - hopefully the busiest for a
while to come. Changes include:
- Some new Chinese translations
- Progress on the battle against double words words and non-HTTPS
URLs
- Some block-mq documentation
- More RST conversions from Mauro. At this point, that task is
essentially complete, so we shouldn't see this kind of churn again
for a while. Unless we decide to switch to asciidoc or
something...:)
- Lots of typo fixes, warning fixes, and more"
* tag 'docs-5.9' of git://git.lwn.net/linux: (195 commits)
scripts/kernel-doc: optionally treat warnings as errors
docs: ia64: correct typo
mailmap: add entry for <alobakin@marvell.com>
doc/zh_CN: add cpu-load Chinese version
Documentation/admin-guide: tainted-kernels: fix spelling mistake
MAINTAINERS: adjust kprobes.rst entry to new location
devices.txt: document rfkill allocation
PCI: correct flag name
docs: filesystems: vfs: correct flag name
docs: filesystems: vfs: correct sync_mode flag names
docs: path-lookup: markup fixes for emphasis
docs: path-lookup: more markup fixes
docs: path-lookup: fix HTML entity mojibake
CREDITS: Replace HTTP links with HTTPS ones
docs: process: Add an example for creating a fixes tag
doc/zh_CN: add Chinese translation prefer section
doc/zh_CN: add clearing-warn-once Chinese version
doc/zh_CN: add admin-guide index
doc:it_IT: process: coding-style.rst: Correct __maybe_unused compiler label
futex: MAINTAINERS: Re-add selftests directory
...
|
|
|
Linus Torvalds
|
c0dfadfed8 |
The main change in this cycle was to add support for ZSTD-compressed
kernel and initrd images. ZSTD has a very fast decompressor, yet it compresses better than gzip. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAl8oNX0RHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1jdcg/9GaPGjmNgMqi3tbfzU3z11OrbraRBgMj5 jHIZ89DuzwsqU+jbwGHGiF45ge85iPK6i2ovR3ePzL0LAlLYT3gqzPcl3kkog4E9 0E0JAddx974uW4toc8cGFEHNf4vXtvvi45FL2yvDoap9xLEcpJsQRdu9upPB4U3s +qotO6wJitM74g4l2WdbStzCAcL4ZXFA/ix19nUyLh4QlFBDqUHwufIhW1G0ciL4 txMXJ23L7e+b6FUvGyK3vFhba1isPdz5xQdQTy2DCK20rQhGu1IBsqzymEibbgIp /j4yHfUKSpxdblFcpZfknI1VM1mbt/WN5dKDKm9UnYBhA/R/2PN0klfrAQAT4SOS sP3bxXqTRXBjmop0NjOLCdjGCySYnPLFPlB6REIrMcvs6LYUSTqMZEusj7McwD7h IqS4zGEMa5A+c6Q4160Qz+zrXIyh/n/bTR/6uOKUktkUQaJ+079P64NK9RtCYZTk dkIHJChjmWZGxxXHEbo+4e7bM8gAMHDmX2pdWE5u72oYJRqBv7PVyl+SHBk+onxM crtKvqOp8Q8coirlfjx5UynZeZmH1VuIFjpvnwlAtqxZGvuTWZ0ojq3E3Y/XwHQj bVejr9AQ1gS9ZBTKwwd5cf7mnOuiXrHrBP3E7buoRw8bWtL+yqHyybqccZnSOUVN lGFshs+7J5o= =bARW -----END PGP SIGNATURE----- Merge tag 'x86-boot-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 boot updates from Ingo Molnar: "The main change in this cycle was to add support for ZSTD-compressed kernel and initrd images. ZSTD has a very fast decompressor, yet it compresses better than gzip" * tag 'x86-boot-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Documentation: dontdiff: Add zstd compressed files .gitignore: Add ZSTD-compressed files x86: Add support for ZSTD compressed kernel x86: Bump ZO_z_extra_bytes margin for zstd usr: Add support for zstd compressed initramfs init: Add support for zstd compressed kernel lib: Add zstd support to decompress lib: Prepare zstd for preboot environment, improve performance |
|
|
Nick Terrell
|
48f7ddf785 |
init: Add support for zstd compressed kernel
- Add the zstd and zstd22 cmds to scripts/Makefile.lib - Add the HAVE_KERNEL_ZSTD and KERNEL_ZSTD options Architecture specific support is still needed for decompression. Signed-off-by: Nick Terrell <terrelln@fb.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20200730190841.2071656-4-nickrterrell@gmail.com |
|
|
Valentin Schneider
|
fcd7c9c3c3 |
arm, arm64: Fix selection of CONFIG_SCHED_THERMAL_PRESSURE
Qian reported that the current setup forgoes the Kconfig dependencies and
results in warnings such as:
WARNING: unmet direct dependencies detected for SCHED_THERMAL_PRESSURE
Depends on [n]: SMP [=y] && CPU_FREQ_THERMAL [=n]
Selected by [y]:
- ARM64 [=y]
Revert commit
|
|
|
Valentin Schneider
|
98eb401d09 |
sched: Cleanup SCHED_THERMAL_PRESSURE kconfig entry
As Russell pointed out [1], this option is severely lacking in the documentation department, and figuring out if one has the required dependencies to benefit from turning it on is not straightforward. Make it non user-visible, and add a bit of help to it. While at it, make it depend on CPU_FREQ_THERMAL. [1]: https://lkml.kernel.org/r/20200603173150.GB1551@shell.armlinux.org.uk Signed-off-by: Valentin Schneider <valentin.schneider@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200712165917.9168-3-valentin.schneider@arm.com |
|
|
Masahiro Yamada
|
b816b3db15 |
kbuild: fix CONFIG_CC_CAN_LINK(_STATIC) for cross-compilation with Clang
scripts/cc-can-link.sh tests if the compiler can link userspace programs. When $(CC) is GCC, it is checked against the target architecture because the toolchain prefix is specified as a part of $(CC). When $(CC) is Clang, it is checked against the host architecture because --target option is missing. Pass $(CLANG_FLAGS) to scripts/cc-can-link.sh to evaluate the link capability for the target architecture. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> |
|
|
Mauro Carvalho Chehab
|
800c02f5d0 |
docs: move nommu-mmap.txt to admin-guide and rename to ReST
The nommu-mmap.txt file provides description of user visible behaviuour. So, move it to the admin-guide. As it is already at the ReST, also rename it. Suggested-by: Mike Rapoport <rppt@linux.ibm.com> Suggested-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/3a63d1833b513700755c85bf3bda0a6c4ab56986.1592918949.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
|
|
Linus Torvalds
|
6adc19fd13 |
Kbuild updates for v5.8 (2nd)
- fix build rules in binderfs sample - fix build errors when Kbuild recurses to the top Makefile - covert '---help---' in Kconfig to 'help' -----BEGIN PGP SIGNATURE----- iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAl7lBuYVHG1hc2FoaXJv eUBrZXJuZWwub3JnAAoJED2LAQed4NsGHvIP/3iErjPshpg/phwH8NTCS4SFkiti BZRM+2lupSn7Qs53BTpVzIkXoHBJQZlJxlQ5HY8ScO+fiz28rKZr+b40us+je1Q+ SkvSPfwZzxjEg7lAZutznG4KgItJLWJKmDyh9T8Y8TAuG4f8WO0hKnXoAp3YorS2 zppEIxso8O5spZPjp+fF/fPbxPjIsabGK7Jp2LpSVFR5pVDHI/ycTlKQS+MFpMEx 6JIpdFRw7TkvKew1dr5uAWT5btWHatEqjSR3JeyVHv3EICTGQwHmcHK67cJzGInK T51+DT7/CpKtmRgGMiTEu/INfMzzoQAKl6Fcu+vMaShTN97Hk9DpdtQyvA6P/h3L 8GA4UBct05J7fjjIB7iUD+GYQ0EZbaFujzRXLYk+dQqEJRbhcCwvdzggGp0WvGRs 1f8/AIpgnQv8JSL/bOMgGMS5uL2dSLsgbzTdr6RzWf1jlYdI1i4u7AZ/nBrwWP+Z iOBkKsVceEoJrTbaynl3eoYqFLtWyDau+//oBc2gUvmhn8ioM5dfqBRiJjxJnPG9 /giRj6xRIqMMEw8Gg8PCG7WebfWxWyaIQwlWBbPok7DwISURK5mvOyakZL+Q25/y 6MBr2H8NEJsf35q0GTINpfZnot7NX4JXrrndJH8NIRC7HEhwd29S041xlQJdP0rs E76xsOr3hrAmBu4P =1NIT -----END PGP SIGNATURE----- Merge tag 'kbuild-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - fix build rules in binderfs sample - fix build errors when Kbuild recurses to the top Makefile - covert '---help---' in Kconfig to 'help' * tag 'kbuild-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: treewide: replace '---help---' in Kconfig files with 'help' kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables samples: binderfs: really compile this sample and fix build issues |
|
|
Masahiro Yamada
|
a7f7f6248d |
treewide: replace '---help---' in Kconfig files with 'help'
Since commit
|
|
|
Linus Torvalds
|
6c32978414 |
Notifications over pipes + Keyring notifications
-----BEGIN PGP SIGNATURE-----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=YTGf
-----END PGP SIGNATURE-----
Merge tag 'notifications-20200601' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull notification queue from David Howells:
"This adds a general notification queue concept and adds an event
source for keys/keyrings, such as linking and unlinking keys and
changing their attributes.
Thanks to Debarshi Ray, we do have a pull request to use this to fix a
problem with gnome-online-accounts - as mentioned last time:
https://gitlab.gnome.org/GNOME/gnome-online-accounts/merge_requests/47
Without this, g-o-a has to constantly poll a keyring-based kerberos
cache to find out if kinit has changed anything.
[ There are other notification pending: mount/sb fsinfo notifications
for libmount that Karel Zak and Ian Kent have been working on, and
Christian Brauner would like to use them in lxc, but let's see how
this one works first ]
LSM hooks are included:
- A set of hooks are provided that allow an LSM to rule on whether or
not a watch may be set. Each of these hooks takes a different
"watched object" parameter, so they're not really shareable. The
LSM should use current's credentials. [Wanted by SELinux & Smack]
- A hook is provided to allow an LSM to rule on whether or not a
particular message may be posted to a particular queue. This is
given the credentials from the event generator (which may be the
system) and the watch setter. [Wanted by Smack]
I've provided SELinux and Smack with implementations of some of these
hooks.
WHY
===
Key/keyring notifications are desirable because if you have your
kerberos tickets in a file/directory, your Gnome desktop will monitor
that using something like fanotify and tell you if your credentials
cache changes.
However, we also have the ability to cache your kerberos tickets in
the session, user or persistent keyring so that it isn't left around
on disk across a reboot or logout. Keyrings, however, cannot currently
be monitored asynchronously, so the desktop has to poll for it - not
so good on a laptop. This facility will allow the desktop to avoid the
need to poll.
DESIGN DECISIONS
================
- The notification queue is built on top of a standard pipe. Messages
are effectively spliced in. The pipe is opened with a special flag:
pipe2(fds, O_NOTIFICATION_PIPE);
The special flag has the same value as O_EXCL (which doesn't seem
like it will ever be applicable in this context)[?]. It is given up
front to make it a lot easier to prohibit splice&co from accessing
the pipe.
[?] Should this be done some other way? I'd rather not use up a new
O_* flag if I can avoid it - should I add a pipe3() system call
instead?
The pipe is then configured::
ioctl(fds[1], IOC_WATCH_QUEUE_SET_SIZE, queue_depth);
ioctl(fds[1], IOC_WATCH_QUEUE_SET_FILTER, &filter);
Messages are then read out of the pipe using read().
- It should be possible to allow write() to insert data into the
notification pipes too, but this is currently disabled as the
kernel has to be able to insert messages into the pipe *without*
holding pipe->mutex and the code to make this work needs careful
auditing.
- sendfile(), splice() and vmsplice() are disabled on notification
pipes because of the pipe->mutex issue and also because they
sometimes want to revert what they just did - but one or more
notification messages might've been interleaved in the ring.
- The kernel inserts messages with the wait queue spinlock held. This
means that pipe_read() and pipe_write() have to take the spinlock
to update the queue pointers.
- Records in the buffer are binary, typed and have a length so that
they can be of varying size.
This allows multiple heterogeneous sources to share a common
buffer; there are 16 million types available, of which I've used
just a few, so there is scope for others to be used. Tags may be
specified when a watchpoint is created to help distinguish the
sources.
- Records are filterable as types have up to 256 subtypes that can be
individually filtered. Other filtration is also available.
- Notification pipes don't interfere with each other; each may be
bound to a different set of watches. Any particular notification
will be copied to all the queues that are currently watching for it
- and only those that are watching for it.
- When recording a notification, the kernel will not sleep, but will
rather mark a queue as having lost a message if there's
insufficient space. read() will fabricate a loss notification
message at an appropriate point later.
- The notification pipe is created and then watchpoints are attached
to it, using one of:
keyctl_watch_key(KEY_SPEC_SESSION_KEYRING, fds[1], 0x01);
watch_mount(AT_FDCWD, "/", 0, fd, 0x02);
watch_sb(AT_FDCWD, "/mnt", 0, fd, 0x03);
where in both cases, fd indicates the queue and the number after is
a tag between 0 and 255.
- Watches are removed if either the notification pipe is destroyed or
the watched object is destroyed. In the latter case, a message will
be generated indicating the enforced watch removal.
Things I want to avoid:
- Introducing features that make the core VFS dependent on the
network stack or networking namespaces (ie. usage of netlink).
- Dumping all this stuff into dmesg and having a daemon that sits
there parsing the output and distributing it as this then puts the
responsibility for security into userspace and makes handling
namespaces tricky. Further, dmesg might not exist or might be
inaccessible inside a container.
- Letting users see events they shouldn't be able to see.
TESTING AND MANPAGES
====================
- The keyutils tree has a pipe-watch branch that has keyctl commands
for making use of notifications. Proposed manual pages can also be
found on this branch, though a couple of them really need to go to
the main manpages repository instead.
If the kernel supports the watching of keys, then running "make
test" on that branch will cause the testing infrastructure to spawn
a monitoring process on the side that monitors a notifications pipe
for all the key/keyring changes induced by the tests and they'll
all be checked off to make sure they happened.
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/keyutils.git/log/?h=pipe-watch
- A test program is provided (samples/watch_queue/watch_test) that
can be used to monitor for keyrings, mount and superblock events.
Information on the notifications is simply logged to stdout"
* tag 'notifications-20200601' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
smack: Implement the watch_key and post_notification hooks
selinux: Implement the watch_key security hook
keys: Make the KEY_NEED_* perms an enum rather than a mask
pipe: Add notification lossage handling
pipe: Allow buffers to be marked read-whole-or-error for notifications
Add sample notification program
watch_queue: Add a key/keyring notification facility
security: Add hooks to rule on setting a watch
pipe: Add general notification queue support
pipe: Add O_NOTIFICATION_PIPE
security: Add a hook for the point of notification insertion
uapi: General notification queue definitions
|
|
|
Linus Torvalds
|
4152d146ee |
Merge branch 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux
Pull READ/WRITE_ONCE rework from Will Deacon:
"This the READ_ONCE rework I've been working on for a while, which
bumps the minimum GCC version and improves code-gen on arm64 when
stack protector is enabled"
[ Side note: I'm _really_ tempted to raise the minimum gcc version to
4.9, so that we can just say that we require _Generic() support.
That would allow us to more cleanly handle a lot of the cases where we
depend on very complex macros with 'sizeof' or __builtin_choose_expr()
with __builtin_types_compatible_p() etc.
This branch has a workaround for sparse not handling _Generic(),
either, but that was already fixed in the sparse development branch,
so it's really just gcc-4.9 that we'd require. - Linus ]
* 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux:
compiler_types.h: Use unoptimized __unqual_scalar_typeof for sparse
compiler_types.h: Optimize __unqual_scalar_typeof compilation time
compiler.h: Enforce that READ_ONCE_NOCHECK() access size is sizeof(long)
compiler-types.h: Include naked type in __pick_integer_type() match
READ_ONCE: Fix comment describing 2x32-bit atomicity
gcov: Remove old GCC 3.4 support
arm64: barrier: Use '__unqual_scalar_typeof' for acquire/release macros
locking/barriers: Use '__unqual_scalar_typeof' for load-acquire macros
READ_ONCE: Drop pointer qualifiers when reading from scalar types
READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses
READ_ONCE: Simplify implementations of {READ,WRITE}_ONCE()
arm64: csum: Disable KASAN for do_csum()
fault_inject: Don't rely on "return value" from WRITE_ONCE()
net: tls: Avoid assigning 'const' pointer to non-const pointer
netfilter: Avoid assigning 'const' pointer to non-const pointer
compiler/gcc: Raise minimum GCC version for kernel builds to 4.8
|
|
|
Linus Torvalds
|
cff11abeca |
Kbuild updates for v5.8
- fix warnings in 'make clean' for ARCH=um, hexagon, h8300, unicore32
- ensure to rebuild all objects when the compiler is upgraded
- exclude system headers from dependency tracking and fixdep processing
- fix potential bit-size mismatch between the kernel and BPF user-mode
helper
- add the new syntax 'userprogs' to build user-space programs for the
target architecture (the same arch as the kernel)
- compile user-space sample code under samples/ for the target arch
instead of the host arch
- make headers_install fail if a CONFIG option is leaked to user-space
- sanitize the output format of scripts/checkstack.pl
- handle ARM 'push' instruction in scripts/checkstack.pl
- error out before modpost if a module name conflict is found
- error out when multiple directories are passed to M= because this
feature is broken for a long time
- add CONFIG_DEBUG_INFO_COMPRESSED to support compressed debug info
- a lot of cleanups of modpost
- dump vmlinux symbols out into vmlinux.symvers, and reuse it in the
second pass of modpost
- do not run the second pass of modpost if nothing in modules is updated
- install modules.builtin(.modinfo) by 'make install' as well as by
'make modules_install' because it is useful even when CONFIG_MODULES=n
- add new command line variables, GZIP, BZIP2, LZOP, LZMA, LZ4, and XZ
to allow users to use alternatives such as pigz, pbzip2, etc.
-----BEGIN PGP SIGNATURE-----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=GKe5
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- fix warnings in 'make clean' for ARCH=um, hexagon, h8300, unicore32
- ensure to rebuild all objects when the compiler is upgraded
- exclude system headers from dependency tracking and fixdep processing
- fix potential bit-size mismatch between the kernel and BPF user-mode
helper
- add the new syntax 'userprogs' to build user-space programs for the
target architecture (the same arch as the kernel)
- compile user-space sample code under samples/ for the target arch
instead of the host arch
- make headers_install fail if a CONFIG option is leaked to user-space
- sanitize the output format of scripts/checkstack.pl
- handle ARM 'push' instruction in scripts/checkstack.pl
- error out before modpost if a module name conflict is found
- error out when multiple directories are passed to M= because this
feature is broken for a long time
- add CONFIG_DEBUG_INFO_COMPRESSED to support compressed debug info
- a lot of cleanups of modpost
- dump vmlinux symbols out into vmlinux.symvers, and reuse it in the
second pass of modpost
- do not run the second pass of modpost if nothing in modules is
updated
- install modules.builtin(.modinfo) by 'make install' as well as by
'make modules_install' because it is useful even when
CONFIG_MODULES=n
- add new command line variables, GZIP, BZIP2, LZOP, LZMA, LZ4, and XZ
to allow users to use alternatives such as pigz, pbzip2, etc.
* tag 'kbuild-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (96 commits)
kbuild: add variables for compression tools
Makefile: install modules.builtin even if CONFIG_MODULES=n
mksysmap: Fix the mismatch of '.L' symbols in System.map
kbuild: doc: rename LDFLAGS to KBUILD_LDFLAGS
modpost: change elf_info->size to size_t
modpost: remove is_vmlinux() helper
modpost: strip .o from modname before calling new_module()
modpost: set have_vmlinux in new_module()
modpost: remove mod->skip struct member
modpost: add mod->is_vmlinux struct member
modpost: remove is_vmlinux() call in check_for_{gpl_usage,unused}()
modpost: remove mod->is_dot_o struct member
modpost: move -d option in scripts/Makefile.modpost
modpost: remove -s option
modpost: remove get_next_text() and make {grab,release_}file static
modpost: use read_text_file() and get_line() for reading text files
modpost: avoid false-positive file open error
modpost: fix potential mmap'ed file overrun in get_src_version()
modpost: add read_text_file() and get_line() helpers
modpost: do not call get_modinfo() for vmlinux(.o)
...
|
|
|
Nick Desaulniers
|
587f17018a |
Kconfig: add config option for asm goto w/ outputs
This allows C code to make use of compilers with support for output variables along the fallthrough path via preprocessor define: CONFIG_CC_HAS_ASM_GOTO_OUTPUT [ This is not used anywhere yet, and currently released compilers don't support this yet, but it's coming, and I have some local experimental patches to take advantage of it when it does - Linus ] Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
|
|
Chris Down
|
ada4ab7af1 |
init: allow distribution configuration of default init
Some init systems (eg. systemd) have init at their own paths, for example, /usr/lib/systemd/systemd. A compatibility symlink to one of the hardcoded init paths is provided by another package, usually named something like systemd-sysvcompat or similar. Currently distro maintainers who are hands-off on the bootloader are more or less required to include those compatibility links as part of their base distribution, because it's hard to migrate away from them since there's a risk some users will not get the message to set init= on the kernel command line appropriately. Moreover, for distributions where the init system is something the distribution itself is opinionated about (eg. Arch, which has systemd in the required `base` package), we could usually reasonably configure this ahead of time when building the distribution kernel. However, we currently simply don't have any way to configure the kernel to do this. Here's an example discussion where removing sysvcompat was discussed by distro maintainers[0]. This patch adds a new Kconfig tunable, CONFIG_DEFAULT_INIT, which if set is tried before the hardcoded fallback list. So the order of precedence is now thus: 1. init= on command line (on failure: panic) 2. CONFIG_DEFAULT_INIT (on failure: try #3) 3. Hardcoded fallback list (on failure: panic) This new config parameter will allow distribution maintainers to move away from these compatibility links safely, without having to worry that their users might not have the right init=. There are also two other benefits of this over having the distribution maintain a symlink: 1. One of the value propositions over simply having distributions maintain a /sbin/init symlink via a package is that it also frees distributions which have a preferred default, but not mandatory, init system from having their package manager fight with their users for control of /{s,}bin/init. Instead, the distribution simply makes their preference known in CONFIG_DEFAULT_INIT, and if the user installs another init system and uninstalls the default one they can still make use of /{s,}bin/init and friends for their own uses. This makes more cases Just Work(tm) without the user having to perform extra configuration via init=. 2. Since before this we don't know which path the distribution actually _intends_ to serve init from, we don't pr_err if it is simply missing, and usually will just silently put the user in a /bin/sh shell. Now that the distribution can make a declaration of intent, we can be more vocal when this init system fails to launch for any reason, even if it's simply because no file exists at that location, speeding up the palaver of init/mount dependency/etc debugging a bit. [0]: https://lists.archlinux.org/pipermail/arch-dev-public/2019-January/029435.html Signed-off-by: Chris Down <chris@chrisdown.name> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Link: http://lkml.kernel.org/r/20200522160234.GA1487022@chrisdown.name Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
|
|
Linus Torvalds
|
ee01c4d72a |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: "More mm/ work, plenty more to come Subsystems affected by this patch series: slub, memcg, gup, kasan, pagealloc, hugetlb, vmscan, tools, mempolicy, memblock, hugetlbfs, thp, mmap, kconfig" * akpm: (131 commits) arm64: mm: use ARCH_HAS_DEBUG_WX instead of arch defined x86: mm: use ARCH_HAS_DEBUG_WX instead of arch defined riscv: support DEBUG_WX mm: add DEBUG_WX support drivers/base/memory.c: cache memory blocks in xarray to accelerate lookup mm/thp: rename pmd_mknotpresent() as pmd_mkinvalid() powerpc/mm: drop platform defined pmd_mknotpresent() mm: thp: don't need to drain lru cache when splitting and mlocking THP hugetlbfs: get unmapped area below TASK_UNMAPPED_BASE for hugetlbfs sparc32: register memory occupied by kernel as memblock.memory include/linux/memblock.h: fix minor typo and unclear comment mm, mempolicy: fix up gup usage in lookup_node tools/vm/page_owner_sort.c: filter out unneeded line mm: swap: memcg: fix memcg stats for huge pages mm: swap: fix vmstats for huge pages mm: vmscan: limit the range of LRU type balancing mm: vmscan: reclaim writepage is IO cost mm: vmscan: determine anon/file pressure balance at the reclaim root mm: balance LRU lists based on relative thrashing mm: only count actual rotations as LRU reclaim cost ... |
|
|
Johannes Weiner
|
2d1c498072 |
mm: memcontrol: make swap tracking an integral part of memory control
Without swap page tracking, users that are otherwise memory controlled can easily escape their containment and allocate significant amounts of memory that they're not being charged for. That's because swap does readahead, but without the cgroup records of who owned the page at swapout, readahead pages don't get charged until somebody actually faults them into their page table and we can identify an owner task. This can be maliciously exploited with MADV_WILLNEED, which triggers arbitrary readahead allocations without charging the pages. Make swap swap page tracking an integral part of memcg and remove the Kconfig options. In the first place, it was only made configurable to allow users to save some memory. But the overhead of tracking cgroup ownership per swap page is minimal - 2 byte per page, or 512k per 1G of swap, or 0.04%. Saving that at the expense of broken containment semantics is not something we should present as a coequal option. The swapaccount=0 boot option will continue to exist, and it will eliminate the page_counter overhead and hide the swap control files, but it won't disable swap slot ownership tracking. This patch makes sure we always have the cgroup records at swapin time; the next patch will fix the actual bug by charging readahead swap pages at swapin time rather than at fault time. v2: fix double swap charge bug in cgroup1/cgroup2 code gating [hannes@cmpxchg.org: fix crash with cgroup_disable=memory] Link: http://lkml.kernel.org/r/20200521215855.GB815153@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Alex Shi <alex.shi@linux.alibaba.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Roman Gushchin <guro@fb.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Naresh Kamboju <naresh.kamboju@linaro.org> Link: http://lkml.kernel.org/r/20200508183105.225460-16-hannes@cmpxchg.org Debugged-by: Hugh Dickins <hughd@google.com> Debugged-by: Michal Hocko <mhocko@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
|
|
Linus Torvalds
|
8226f11318 |
MIPS updates for v5.8:
- added support for MIPSr5 and P5600 cores - converted Loongson PCI driver into a PCI host driver using the generic PCI framework - added emulation of CPUCFG command for Loogonson64 cpus - removed of LASAT, PMC MSP71xx and NEC MARKEINS/EMMA - ioremap cleanup - fix for a race between two threads faulting the same page - various cleanups and fixes -----BEGIN PGP SIGNATURE----- iQJOBAABCAA4FiEEbt46xwy6kEcDOXoUeZbBVTGwZHAFAl7WK54aHHRzYm9nZW5k QGFscGhhLmZyYW5rZW4uZGUACgkQeZbBVTGwZHAbjA/9EEFeqNg9UNUH6/TS18QV qkxKp0+LC4Jk+SduzLyYsYy6l/dSaKYl8m9jyJsWjM6BvBZTcMJJOnzIPRafI0s+ MK8GCSZunAkm25DsDvfobQUkbQ/UHjY/fuRpNslbDcsYqIKv90hUMd21ccXY6KC5 RY+aMlpjgksg1X8JJ7k1Rs05sXyUPqpESteyqehF1b/+Iyv7H2L3v5EvQwvPDs6f TyVgNJU2B3RCU6/uAcWmHdVLxXd+Y8fM0vC8DCO0pg0rGf4be0FbZztHmeq6r2wy g7wsO7acKWGzulFQD5ftVSQ6i8KHIDNDePmDMtU5oFcXkzUDdGvd3j3Gst19/nve ZftNmQHOY1JqGUOhdq1fDG/4M3Vc5bvh3W6eMG22TuMLEWsOF8teY8uUa/vxOb+B 2NsJ9q6ylRS7RDWWOrApJWfFYPvhr5wlLxT+azWNa9y3bjV8vDLjNdU0mRLA1nsu yLzYMwIhtWfZhkJZ+xJVSmQ6LjAHDN5TF/LEx/9itLg5t9wrEosFPAtOv8V15hy4 KBNvvWeoy7RRmBTNuKh7r9Ui4jw7GgxL4D1OwzCsF//GAiGyuuh0zMuUE8EXA6K5 MpdGt+bSOcLl8ILTtGir8e4MXLawDH8n94f8QWLb9FcOvU4KHUjRKU7EQ6dyD5dk a7xskGLXWdVO3IJ/Xvxcaeo= =eAtN -----END PGP SIGNATURE----- Merge tag 'mips_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS updates from Thomas Bogendoerfer: - added support for MIPSr5 and P5600 cores - converted Loongson PCI driver into a PCI host driver using the generic PCI framework - added emulation of CPUCFG command for Loogonson64 cpus - removed of LASAT, PMC MSP71xx and NEC MARKEINS/EMMA - ioremap cleanup - fix for a race between two threads faulting the same page - various cleanups and fixes * tag 'mips_5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (143 commits) MIPS: ralink: drop ralink_clk_init for mt7621 MIPS: ralink: bootrom: mark a function as __init to save some memory MIPS: Loongson64: Reorder CPUCFG model match arms MIPS: Expose Loongson CPUCFG availability via HWCAP MIPS: Loongson64: Guard against future cores without CPUCFG MIPS: Fix build warning about "PTR_STR" redefinition MIPS: Loongson64: Remove not used pci.c MIPS: Loongson64: Define PCI_IOBASE MIPS: CPU_LOONGSON2EF need software to maintain cache consistency MIPS: DTS: Fix build errors used with various configs MIPS: Loongson64: select NO_EXCEPT_FILL MIPS: Fix IRQ tracing when call handle_fpe() and handle_msa_fpe() MIPS: mm: add page valid judgement in function pte_modify mm/memory.c: Add memory read privilege on page fault handling mm/memory.c: Update local TLB if PTE entry exists MIPS: Do not flush tlb page when updating PTE entry MIPS: ingenic: Default to a generic board MIPS: ingenic: Add support for GCW Zero prototype MIPS: ingenic: DTS: Add memory info of GCW Zero MIPS: Loongson64: Switch to generic PCI driver ... |
|
|
David Howells
|
c73be61ced |
pipe: Add general notification queue support
Make it possible to have a general notification queue built on top of a
standard pipe. Notifications are 'spliced' into the pipe and then read
out. splice(), vmsplice() and sendfile() are forbidden on pipes used for
notifications as post_one_notification() cannot take pipe->mutex. This
means that notifications could be posted in between individual pipe
buffers, making iov_iter_revert() difficult to effect.
The way the notification queue is used is:
(1) An application opens a pipe with a special flag and indicates the
number of messages it wishes to be able to queue at once (this can
only be set once):
pipe2(fds, O_NOTIFICATION_PIPE);
ioctl(fds[0], IOC_WATCH_QUEUE_SET_SIZE, queue_depth);
(2) The application then uses poll() and read() as normal to extract data
from the pipe. read() will return multiple notifications if the
buffer is big enough, but it will not split a notification across
buffers - rather it will return a short read or EMSGSIZE.
Notification messages include a length in the header so that the
caller can split them up.
Each message has a header that describes it:
struct watch_notification {
__u32 type:24;
__u32 subtype:8;
__u32 info;
};
The type indicates the source (eg. mount tree changes, superblock events,
keyring changes, block layer events) and the subtype indicates the event
type (eg. mount, unmount; EIO, EDQUOT; link, unlink). The info field
indicates a number of things, including the entry length, an ID assigned to
a watchpoint contributing to this buffer and type-specific flags.
Supplementary data, such as the key ID that generated an event, can be
attached in additional slots. The maximum message size is 127 bytes.
Messages may not be padded or aligned, so there is no guarantee, for
example, that the notification type will be on a 4-byte bounary.
Signed-off-by: David Howells <dhowells@redhat.com>
|
|
|
Masahiro Yamada
|
b1183b6dca |
bpfilter: check if $(CC) can link static libc in Kconfig
On Fedora, linking static glibc requires the glibc-static RPM package,
which is not part of the glibc-devel package.
CONFIG_CC_CAN_LINK does not check the capability of static linking,
so you can enable CONFIG_BPFILTER_UMH, then fail to build:
HOSTLD net/bpfilter/bpfilter_umh
/usr/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status
Add CONFIG_CC_CAN_LINK_STATIC, and make CONFIG_BPFILTER_UMH depend
on it.
Reported-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
|
|
|
Masahiro Yamada
|
9371f86ecb |
bpfilter: match bit size of bpfilter_umh to that of the kernel
bpfilter_umh is built for the default machine bit of the compiler, which may not match to the bit size of the kernel. This happens in the scenario below: You can use biarch GCC that defaults to 64-bit for building the 32-bit kernel. In this case, Kbuild passes -m32 to teach the compiler to produce 32-bit kernel space objects. However, it is missing when building bpfilter_umh. It is built as a 64-bit ELF, and then embedded into the 32-bit kernel. The 32-bit kernel and 64-bit umh is a bad combination. In theory, we can have 32-bit umh running on 64-bit kernel, but we do not have a good reason to support such a usecase. The best is to match the bit size between them. Pass -m32 or -m64 to the umh build command if it is found in $(KBUILD_CFLAGS). Evaluate CC_CAN_LINK against the kernel bit-size. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
|
|
Linus Torvalds
|
f85c1598dd |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from David Miller:
1) Fix sk_psock reference count leak on receive, from Xiyu Yang.
2) CONFIG_HNS should be invisible, from Geert Uytterhoeven.
3) Don't allow locking route MTUs in ipv6, RFCs actually forbid this,
from Maciej Żenczykowski.
4) ipv4 route redirect backoff wasn't actually enforced, from Paolo
Abeni.
5) Fix netprio cgroup v2 leak, from Zefan Li.
6) Fix infinite loop on rmmod in conntrack, from Florian Westphal.
7) Fix tcp SO_RCVLOWAT hangs, from Eric Dumazet.
8) Various bpf probe handling fixes, from Daniel Borkmann.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits)
selftests: mptcp: pm: rm the right tmp file
dpaa2-eth: properly handle buffer size restrictions
bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier
bpf: Add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range
bpf: Restrict bpf_probe_read{, str}() only to archs where they work
MAINTAINERS: Mark networking drivers as Maintained.
ipmr: Add lockdep expression to ipmr_for_each_table macro
ipmr: Fix RCU list debugging warning
drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c
net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810
tcp: fix error recovery in tcp_zerocopy_receive()
MAINTAINERS: Add Jakub to networking drivers.
MAINTAINERS: another add of Karsten Graul for S390 networking
drivers: ipa: fix typos for ipa_smp2p structure doc
pppoe: only process PADT targeted at local interfaces
selftests/bpf: Enforce returning 0 for fentry/fexit programs
bpf: Enforce returning 0 for fentry/fexit progs
net: stmmac: fix num_por initialization
security: Fix the default value of secid_to_secctx hook
libbpf: Fix register naming in PT_REGS s390 macros
...
|
|
|
Daniel Borkmann
|
0ebeea8ca8 |
bpf: Restrict bpf_probe_read{, str}() only to archs where they work
Given the legacy bpf_probe_read{,str}() BPF helpers are broken on archs
with overlapping address ranges, we should really take the next step to
disable them from BPF use there.
To generally fix the situation, we've recently added new helper variants
bpf_probe_read_{user,kernel}() and bpf_probe_read_{user,kernel}_str().
For details on them, see
|
|
|
Sami Tolvanen
|
b744b43f79 |
kbuild: add CONFIG_LD_IS_LLD
Similarly to the CC_IS_CLANG config, add LD_IS_LLD to avoid GNU ld specific logic such as ld-version or ld-ifversion and gain the ability to select potential features that depend on the linker at configuration time such as LTO. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Acked-by: Masahiro Yamada <masahiroy@kernel.org> [nc: Reword commit message] Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> |
|
|
Masahiro Yamada
|
8b59cd81dc |
kbuild: ensure full rebuild when the compiler is updated
Commit
|
|
|
Masahiro Yamada
|
e33ae3ed33 |
kbuild: use $(CC_VERSION_TEXT) to evaluate CC_IS_GCC and CC_IS_CLANG
The result of '$(CC) --version | head -n 1' has already been computed by the top Makefile, and stored in the environment variable, CC_VERSION_TEXT. 'echo' is cheaper than the two commands $(CC) and 'head' although this optimization is not noticeable level. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> |
|
|
Linus Torvalds
|
78a5255ffb |
Stop the ad-hoc games with -Wno-maybe-initialized
We have some rather random rules about when we accept the "maybe-initialized" warnings, and when we don't. For example, we consider it unreliable for gcc versions < 4.9, but also if -O3 is enabled, or if optimizing for size. And then various kernel config options disabled it, because they know that they trigger that warning by confusing gcc sufficiently (ie PROFILE_ALL_BRANCHES). And now gcc-10 seems to be introducing a lot of those warnings too, so it falls under the same heading as 4.9 did. At the same time, we have a very straightforward way to _enable_ that warning when wanted: use "W=2" to enable more warnings. So stop playing these ad-hoc games, and just disable that warning by default, with the known and straight-forward "if you want to work on the extra compiler warnings, use W=123". Would it be great to have code that is always so obvious that it never confuses the compiler whether a variable is used initialized or not? Yes, it would. In a perfect world, the compilers would be smarter, and our source code would be simpler. That's currently not the world we live in, though. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
|
|
Will Deacon
|
5429ef62bc |
compiler/gcc: Raise minimum GCC version for kernel builds to 4.8
It is very rare to see versions of GCC prior to 4.8 being used to build the mainline kernel. These old compilers are also know to have codegen issues which can lead to silent miscompilation: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145 Raise the minimum GCC version for kernel build to 4.8 and remove some tautological Kconfig dependencies as a consequence. Cc: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Will Deacon <will@kernel.org> |
|
|
Linus Torvalds
|
87ebc45d2d |
arm64 fixes:
- Ensure that the compiler and linker versions are aligned so that ld doesn't complain about not understanding a .note.gnu.property section (emitted when pointer authentication is enabled). - Force -mbranch-protection=none when the feature is not enabled, in case a compiler may choose a different default value. - Remove CONFIG_DEBUG_ALIGN_RODATA. It was never in defconfig and rarely enabled. - Fix checking 16-bit Thumb-2 instructions checking mask in the emulation of the SETEND instruction (it could match the bottom half of a 32-bit Thumb-2 instruction). -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAl6PUYAACgkQa9axLQDI XvH83g/7B5v0RFqjqVW4/cQKoN1rii7qSA8pBfNgGiCMJKtoGvliAlp3xWEtlW0h nYJ4gCvey946r5kvZrjdBXC/Ulo2CcGYtX0n8d+8IB6wXAnGcQ0DUBUFZ4+fAU9Z F7+R7its24dma9R1wIFHFmQUdlO+EgQTfQFvhQKYMSNVaFQF73Sp/vk3oKhJ2E0x QevgDBQSmmcX3DFxhUW7BdcdboBgtTDUGdhcImdorgp7QmI1r40espJKX4VMKvmb pfzwg+i7KM6N1RDhRfA2oFMegXwI3rvM3XesqYaua8+xWD5vJuIQfq+ysEq9F9x/ Hnu+W9nbcN8RKQ9JToiqkE7ifuOBTvaIJaqsgIXYSqtYjatuPAh85MkrorHi9Ji2 9i7fc0GMTgtgYDo/93++l8SmmRJMX+h+9KtGtxx39+UqGjToJMCnPGjwBSwe4wdK lKOAgj488HHsNwTlrRUnq1hXjNjd1w+ON7JM2L3IyRNX/eWN60VxwzwHkZMByCOj jlcY4ISWquigW4w9Sp4nxEhLF9dWT1+OrE33Xh3CUxPU94jSEvgcDHcxuGeGOlrA QjN1B2APZFox8XbOsLgeG2kKe5C3Fui90SEn0GyA0ncVLsXDI78VnVJR9uz5+6Pd ALVQKkJxswhSDPQFlH+7CmQAcr8jWyLEEvyXXaZsoJmewzCpEPM= =pHRG -----END PGP SIGNATURE----- Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Ensure that the compiler and linker versions are aligned so that ld doesn't complain about not understanding a .note.gnu.property section (emitted when pointer authentication is enabled). - Force -mbranch-protection=none when the feature is not enabled, in case a compiler may choose a different default value. - Remove CONFIG_DEBUG_ALIGN_RODATA. It was never in defconfig and rarely enabled. - Fix checking 16-bit Thumb-2 instructions checking mask in the emulation of the SETEND instruction (it could match the bottom half of a 32-bit Thumb-2 instruction). * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: armv8_deprecated: Fix undef_hook mask for thumb setend arm64: remove CONFIG_DEBUG_ALIGN_RODATA feature arm64: Always force a branch protection mode when the compiler has one arm64: Kconfig: ptrauth: Add binutils version check to fix mismatch init/kconfig: Add LD_VERSION Kconfig |
|
|
Krzysztof Kozlowski
|
7baf219982 |
init/Kconfig: clean up ANON_INODES and old IO schedulers options
CONFIG_ANON_INODES is gone since commit |
|
|
Andrea Arcangeli
|
5a281062af |
userfaultfd: wp: add WP pagetable tracking to x86
Accurate userfaultfd WP tracking is possible by tracking exactly which virtual memory ranges were writeprotected by userland. We can't relay only on the RW bit of the mapped pagetable because that information is destroyed by fork() or KSM or swap. If we were to relay on that, we'd need to stay on the safe side and generate false positive wp faults for every swapped out page. [peterx@redhat.com: append _PAGE_UFD_WP to _PAGE_CHG_MASK] Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Bobby Powers <bobbypowers@gmail.com> Cc: Brian Geffon <bgeffon@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: Denis Plotnikov <dplotnikov@virtuozzo.com> Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "Kirill A . Shutemov" <kirill@shutemov.name> Cc: Martin Cracauer <cracauer@cons.org> Cc: Marty McFadden <mcfadden8@llnl.gov> Cc: Maya Gokhale <gokhale2@llnl.gov> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@fb.com> Link: http://lkml.kernel.org/r/20200220163112.11409-4-peterx@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
|
|
Linus Torvalds
|
c48b07226b |
perf updates all over the place:
core:
- Support for cgroup tracking in samples to allow cgroup based
analysis
tools:
- Support for cgroup analysis
- Commandline option and hotkey for perf top to change the sort order
- A set of fixes all over the place
- Various build system related improvements
- Updates of the X86 pmu event JSON data
- Documentation updates
-----BEGIN PGP SIGNATURE-----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=2UUD
-----END PGP SIGNATURE-----
Merge tag 'perf-urgent-2020-04-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull more perf updates from Thomas Gleixner:
"Perf updates all over the place:
core:
- Support for cgroup tracking in samples to allow cgroup based
analysis
tools:
- Support for cgroup analysis
- Commandline option and hotkey for perf top to change the sort order
- A set of fixes all over the place
- Various build system related improvements
- Updates of the X86 pmu event JSON data
- Documentation updates"
* tag 'perf-urgent-2020-04-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (55 commits)
perf python: Fix clang detection to strip out options passed in $CC
perf tools: Support Python 3.8+ in Makefile
perf script: Fix invalid read of directory entry after closedir()
perf script report: Fix SEGFAULT when using DWARF mode
perf script: add -S/--symbols documentation
perf pmu-events x86: Use CPU_CLK_UNHALTED.THREAD in Kernel_Utilization metric
perf events parser: Add missing Intel CPU events to parser
perf script: Allow --symbol to accept hexadecimal addresses
perf report/top TUI: Fix title line formatting
perf top: Support hotkey to change sort order
perf top: Support --group-sort-idx to change the sort order
perf symbols: Fix arm64 gap between kernel start and module end
perf build-test: Honour JOBS to override detection of number of cores
perf script: Add --show-cgroup-events option
perf top: Add --all-cgroups option
perf record: Add --all-cgroups option
perf record: Support synthesizing cgroup events
perf report: Add 'cgroup' sort key
perf cgroup: Maintain cgroup hierarchy
perf tools: Basic support for CGROUP event
...
|
|
|
Ingo Molnar
|
7dc41b9b99 |
perf/urgent fixes and improvements:
perf python:
Arnaldo Carvalho de Melo:
- Fix clang detection to strip out options passed in $CC.
build:
He Zhe:
- Normalize gcc parameter when generating arch errno table, fixing
the build by removing options from $(CC).
Sam Lunt:
- Support Python 3.8+ in Makefile.
perf report/top:
Arnaldo Carvalho de Melo:
- Fix title line formatting.
perf script:
Andreas Gerstmayr:
- Fix SEGFAULT when using DWARF mode.
- Fix invalid read of directory entry after closedir(), found with valgrind.
Hagen Paul Pfeifer:
- Introduce --deltatime option.
Stephane Eranian:
- Allow --symbol to accept hexadecimal addresses.
Ian Rogers:
- Add -S/--symbols documentation
Namhyung Kim:
- Add --show-cgroup-events option.
perf python:
Arnaldo Carvalho de Melo:
- Include rwsem.c in the python binding, needed by the cgroups improvements.
build-test:
Arnaldo Carvalho de Melo:
- Honour JOBS to override detection of number of cores
perf top:
Jin Yao:
- Support --group-sort-idx to change the sort order
- perf top: Support hotkey to change sort order
perf pmu-events x86:
Jin Yao:
- Use CPU_CLK_UNHALTED.THREAD in Kernel_Utilization metric
perf symbols arm64:
Kemeng Shi:
- Fix arm64 gap between kernel start and module end
kernel perf subsystem:
Namhyung Kim:
- Add PERF_RECORD_CGROUP event and Add PERF_SAMPLE_CGROUP feature,
to allow cgroup tracking, saving a link between cgroup path and
its id number.
perf cgroup:
Namhyung Kim:
- Maintain cgroup hierarchy.
perf report:
Namhyung Kim:
- Add 'cgroup' sort key.
perf record:
Namhyung Kim:
- Support synthesizing cgroup events for pre-existing cgroups.
- Add --all-cgroups option
Documentation:
Tony Jones:
- Update docs regarding kernel/user space unwinding.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQR2GiIUctdOfX2qHhGyPKLppCJ+JwUCXodMtwAKCRCyPKLppCJ+
J+leAP0Ws0dGzMSIwcMVc7zvK1IsYOTlZ8lYXJePxD+Po/YPdAEA6Squf4gwZ2wm
b9R7w50dlCkMJ9LaueCeZZjh/4asFwQ=
=auOb
-----END PGP SIGNATURE-----
Merge tag 'perf-urgent-for-mingo-5.7-20200403' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes and improvements from Arnaldo Carvalho de Melo:
perf python:
Arnaldo Carvalho de Melo:
- Fix clang detection to strip out options passed in $CC.
build:
He Zhe:
- Normalize gcc parameter when generating arch errno table, fixing
the build by removing options from $(CC).
Sam Lunt:
- Support Python 3.8+ in Makefile.
perf report/top:
Arnaldo Carvalho de Melo:
- Fix title line formatting.
perf script:
Andreas Gerstmayr:
- Fix SEGFAULT when using DWARF mode.
- Fix invalid read of directory entry after closedir(), found with valgrind.
Hagen Paul Pfeifer:
- Introduce --deltatime option.
Stephane Eranian:
- Allow --symbol to accept hexadecimal addresses.
Ian Rogers:
- Add -S/--symbols documentation
Namhyung Kim:
- Add --show-cgroup-events option.
perf python:
Arnaldo Carvalho de Melo:
- Include rwsem.c in the python binding, needed by the cgroups improvements.
build-test:
Arnaldo Carvalho de Melo:
- Honour JOBS to override detection of number of cores
perf top:
Jin Yao:
- Support --group-sort-idx to change the sort order
- perf top: Support hotkey to change sort order
perf pmu-events x86:
Jin Yao:
- Use CPU_CLK_UNHALTED.THREAD in Kernel_Utilization metric
perf symbols arm64:
Kemeng Shi:
- Fix arm64 gap between kernel start and module end
kernel perf subsystem:
Namhyung Kim:
- Add PERF_RECORD_CGROUP event and Add PERF_SAMPLE_CGROUP feature,
to allow cgroup tracking, saving a link between cgroup path and
its id number.
perf cgroup:
Namhyung Kim:
- Maintain cgroup hierarchy.
perf report:
Namhyung Kim:
- Add 'cgroup' sort key.
perf record:
Namhyung Kim:
- Support synthesizing cgroup events for pre-existing cgroups.
- Add --all-cgroups option
Documentation:
Tony Jones:
- Update docs regarding kernel/user space unwinding.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
|
Amit Daniel Kachhap
|
9553d16fa6 |
init/kconfig: Add LD_VERSION Kconfig
This option can be used in Kconfig files to compare the ld version and enable/disable incompatible config options if required. This option is used in the subsequent patch along with GCC_VERSION to filter out an incompatible feature. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
|
|
Linus Torvalds
|
29d9f30d4c |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from David Miller:
"Highlights:
1) Fix the iwlwifi regression, from Johannes Berg.
2) Support BSS coloring and 802.11 encapsulation offloading in
hardware, from John Crispin.
3) Fix some potential Spectre issues in qtnfmac, from Sergey
Matyukevich.
4) Add TTL decrement action to openvswitch, from Matteo Croce.
5) Allow paralleization through flow_action setup by not taking the
RTNL mutex, from Vlad Buslov.
6) A lot of zero-length array to flexible-array conversions, from
Gustavo A. R. Silva.
7) Align XDP statistics names across several drivers for consistency,
from Lorenzo Bianconi.
8) Add various pieces of infrastructure for offloading conntrack, and
make use of it in mlx5 driver, from Paul Blakey.
9) Allow using listening sockets in BPF sockmap, from Jakub Sitnicki.
10) Lots of parallelization improvements during configuration changes
in mlxsw driver, from Ido Schimmel.
11) Add support to devlink for generic packet traps, which report
packets dropped during ACL processing. And use them in mlxsw
driver. From Jiri Pirko.
12) Support bcmgenet on ACPI, from Jeremy Linton.
13) Make BPF compatible with RT, from Thomas Gleixnet, Alexei
Starovoitov, and your's truly.
14) Support XDP meta-data in virtio_net, from Yuya Kusakabe.
15) Fix sysfs permissions when network devices change namespaces, from
Christian Brauner.
16) Add a flags element to ethtool_ops so that drivers can more simply
indicate which coalescing parameters they actually support, and
therefore the generic layer can validate the user's ethtool
request. Use this in all drivers, from Jakub Kicinski.
17) Offload FIFO qdisc in mlxsw, from Petr Machata.
18) Support UDP sockets in sockmap, from Lorenz Bauer.
19) Fix stretch ACK bugs in several TCP congestion control modules,
from Pengcheng Yang.
20) Support virtual functiosn in octeontx2 driver, from Tomasz
Duszynski.
21) Add region operations for devlink and use it in ice driver to dump
NVM contents, from Jacob Keller.
22) Add support for hw offload of MACSEC, from Antoine Tenart.
23) Add support for BPF programs that can be attached to LSM hooks,
from KP Singh.
24) Support for multiple paths, path managers, and counters in MPTCP.
From Peter Krystad, Paolo Abeni, Florian Westphal, Davide Caratti,
and others.
25) More progress on adding the netlink interface to ethtool, from
Michal Kubecek"
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2121 commits)
net: ipv6: rpl_iptunnel: Fix potential memory leak in rpl_do_srh_inline
cxgb4/chcr: nic-tls stats in ethtool
net: dsa: fix oops while probing Marvell DSA switches
net/bpfilter: remove superfluous testing message
net: macb: Fix handling of fixed-link node
net: dsa: ksz: Select KSZ protocol tag
netdevsim: dev: Fix memory leak in nsim_dev_take_snapshot_write
net: stmmac: add EHL 2.5Gbps PCI info and PCI ID
net: stmmac: add EHL PSE0 & PSE1 1Gbps PCI info and PCI ID
net: stmmac: create dwmac-intel.c to contain all Intel platform
net: dsa: bcm_sf2: Support specifying VLAN tag egress rule
net: dsa: bcm_sf2: Add support for matching VLAN TCI
net: dsa: bcm_sf2: Move writing of CFP_DATA(5) into slicing functions
net: dsa: bcm_sf2: Check earlier for FLOW_EXT and FLOW_MAC_EXT
net: dsa: bcm_sf2: Disable learning for ASP port
net: dsa: b53: Deny enslaving port 7 for 7278 into a bridge
net: dsa: b53: Prevent tagged VLAN on port 7 for 7278
net: dsa: b53: Restore VLAN entries upon (re)configuration
net: dsa: bcm_sf2: Fix overflow checks
hv_netvsc: Remove unnecessary round_up for recv_completion_cnt
...
|
|
|
Linus Torvalds
|
5b67fbfc32 |
Kbuild updates for v5.7
[Build system]
- add CONFIG_UNUSED_KSYMS_WHITELIST, which will be useful to define
a fixed set of export symbols for Generic Kernel Image (GKI)
- allow to run 'make dt_binding_check' without .config
- use full schema for checking DT examples in *.yaml files
- make modpost fail for missing MODULE_IMPORT_NS(), which makes more
sense because we know the produced modules are never loadable
- Remove unused 'AS' variable
[Kconfig]
- sanitize DEFCONFIG_LIST, and remove ARCH_DEFCONFIG from Kconfig files
- relax the 'imply' behavior so that symbols implied by y can become m
- make 'imply' obey 'depends on' in order to make 'imply' really weak
[Misc]
- add documentation on building the kernel with Clang/LLVM
- revive __HAVE_ARCH_STRLEN for 32bit sparc to use optimized strlen()
- fix warning from deb-pkg builds when CONFIG_DEBUG_INFO=n
- various script and Makefile cleanups
-----BEGIN PGP SIGNATURE-----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=wT8A
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
"Build system:
- add CONFIG_UNUSED_KSYMS_WHITELIST, which will be useful to define a
fixed set of export symbols for Generic Kernel Image (GKI)
- allow to run 'make dt_binding_check' without .config
- use full schema for checking DT examples in *.yaml files
- make modpost fail for missing MODULE_IMPORT_NS(), which makes more
sense because we know the produced modules are never loadable
- Remove unused 'AS' variable
Kconfig:
- sanitize DEFCONFIG_LIST, and remove ARCH_DEFCONFIG from Kconfig
files
- relax the 'imply' behavior so that symbols implied by 'y' can
become 'm'
- make 'imply' obey 'depends on' in order to make 'imply' really weak
Misc:
- add documentation on building the kernel with Clang/LLVM
- revive __HAVE_ARCH_STRLEN for 32bit sparc to use optimized strlen()
- fix warning from deb-pkg builds when CONFIG_DEBUG_INFO=n
- various script and Makefile cleanups"
* tag 'kbuild-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
Makefile: Update kselftest help information
kbuild: deb-pkg: fix warning when CONFIG_DEBUG_INFO is unset
kbuild: add outputmakefile to no-dot-config-targets
kbuild: remove AS variable
net: wan: wanxl: refactor the firmware rebuild rule
net: wan: wanxl: use $(M68KCC) instead of $(M68KAS) for rebuilding firmware
net: wan: wanxl: use allow to pass CROSS_COMPILE_M68k for rebuilding firmware
kbuild: add comment about grouped target
kbuild: add -Wall to KBUILD_HOSTCXXFLAGS
kconfig: remove unused variable in qconf.cc
sparc: revive __HAVE_ARCH_STRLEN for 32bit sparc
kbuild: refactor Makefile.dtbinst more
kbuild: compute the dtbs_install destination more simply
Makefile: disallow data races on gcc-10 as well
kconfig: make 'imply' obey the direct dependency
kconfig: allow symbols implied by y to become m
net: drop_monitor: use IS_REACHABLE() to guard net_dm_hw_report()
modpost: return error if module is missing ns imports and MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS=n
modpost: rework and consolidate logging interface
kbuild: allow to run dt_binding_check without kernel configuration
...
|
|
|
David S. Miller
|
ed52f2c608 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Signed-off-by: David S. Miller <davem@davemloft.net> |
|
|
Linus Torvalds
|
642e53ead6 |
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"The main changes in this cycle are:
- Various NUMA scheduling updates: harmonize the load-balancer and
NUMA placement logic to not work against each other. The intended
result is better locality, better utilization and fewer migrations.
- Introduce Thermal Pressure tracking and optimizations, to improve
task placement on thermally overloaded systems.
- Implement frequency invariant scheduler accounting on (some) x86
CPUs. This is done by observing and sampling the 'recent' CPU
frequency average at ~tick boundaries. The CPU provides this data
via the APERF/MPERF MSRs. This hopefully makes our capacity
estimates more precise and keeps tasks on the same CPU better even
if it might seem overloaded at a lower momentary frequency. (As
usual, turbo mode is a complication that we resolve by observing
the maximum frequency and renormalizing to it.)
- Add asymmetric CPU capacity wakeup scan to improve capacity
utilization on asymmetric topologies. (big.LITTLE systems)
- PSI fixes and optimizations.
- RT scheduling capacity awareness fixes & improvements.
- Optimize the CONFIG_RT_GROUP_SCHED constraints code.
- Misc fixes, cleanups and optimizations - see the changelog for
details"
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (62 commits)
threads: Update PID limit comment according to futex UAPI change
sched/fair: Fix condition of avg_load calculation
sched/rt: cpupri_find: Trigger a full search as fallback
kthread: Do not preempt current task if it is going to call schedule()
sched/fair: Improve spreading of utilization
sched: Avoid scale real weight down to zero
psi: Move PF_MEMSTALL out of task->flags
MAINTAINERS: Add maintenance information for psi
psi: Optimize switching tasks inside shared cgroups
psi: Fix cpu.pressure for cpu.max and competing cgroups
sched/core: Distribute tasks within affinity masks
sched/fair: Fix enqueue_task_fair warning
thermal/cpu-cooling, sched/core: Move the arch_set_thermal_pressure() API to generic scheduler code
sched/rt: Remove unnecessary push for unfit tasks
sched/rt: Allow pulling unfitting task
sched/rt: Optimize cpupri_find() on non-heterogenous systems
sched/rt: Re-instate old behavior in select_task_rq_rt()
sched/rt: cpupri_find: Implement fallback mechanism for !fit case
sched/fair: Fix reordering of enqueue/dequeue_task_fair()
sched/fair: Fix runnable_avg for throttled cfs
...
|
|
|
KP Singh
|
4edf16b72c |
bpf, lsm: Make BPF_LSM depend on BPF_EVENTS
LSM and tracing programs share their helpers with bpf_tracing_func_proto
which is only defined (in bpf_trace.c) when BPF_EVENTS is enabled.
Instead of adding __weak symbol, make BPF_LSM depend on BPF_EVENTS so
that both tracing and LSM programs can actually share helpers.
Fixes:
|
|
|
KP Singh
|
fc611f47f2 |
bpf: Introduce BPF_PROG_TYPE_LSM
Introduce types and configs for bpf programs that can be attached to LSM hooks. The programs can be enabled by the config option CONFIG_BPF_LSM. Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Brendan Jackman <jackmanb@google.com> Reviewed-by: Florent Revest <revest@google.com> Reviewed-by: Thomas Garnier <thgarnie@google.com> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: James Morris <jamorris@linux.microsoft.com> Link: https://lore.kernel.org/bpf/20200329004356.27286-2-kpsingh@chromium.org |
|
|
Namhyung Kim
|
6546b19f95 |
perf/core: Add PERF_SAMPLE_CGROUP feature
The PERF_SAMPLE_CGROUP bit is to save (perf_event) cgroup information in the sample. It will add a 64-bit id to identify current cgroup and it's the file handle in the cgroup file system. Userspace should use this information with PERF_RECORD_CGROUP event to match which cgroup it belongs. I put it before PERF_SAMPLE_AUX for simplicity since it just needs a 64-bit word. But if we want bigger samples, I can work on that direction too. Committer testing: $ pahole perf_sample_data | grep -w cgroup -B5 -A5 /* --- cacheline 4 boundary (256 bytes) was 56 bytes ago --- */ struct perf_regs regs_intr; /* 312 16 */ /* --- cacheline 5 boundary (320 bytes) was 8 bytes ago --- */ u64 stack_user_size; /* 328 8 */ u64 phys_addr; /* 336 8 */ u64 cgroup; /* 344 8 */ /* size: 384, cachelines: 6, members: 22 */ /* padding: 32 */ }; $ Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Tejun Heo <tj@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Zefan Li <lizefan@huawei.com> Link: http://lore.kernel.org/lkml/20200325124536.2800725-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
|
Masahiro Yamada
|
3a7c733165 |
int128: fix __uint128_t compiler test in Kconfig
The support for __uint128_t is dependent on the target bit size.
GCC that defaults to the 32-bit can still build the 64-bit kernel
with -m64 flag passed.
However, $(cc-option,-D__SIZEOF_INT128__=0) is evaluated against the
default machine bit, which may not match to the kernel it is building.
Theoretically, this could be evaluated separately for 64BIT/32BIT.
config CC_HAS_INT128
bool
default !$(cc-option,$(m64-flag) -D__SIZEOF_INT128__=0) if 64BIT
default !$(cc-option,$(m32-flag) -D__SIZEOF_INT128__=0)
I simplified it more because the 32-bit compiler is unlikely to support
__uint128_t.
Fixes:
|
|
|
Thara Gopinath
|
765047932f |
sched/pelt: Add support to track thermal pressure
Extrapolating on the existing framework to track rt/dl utilization using pelt signals, add a similar mechanism to track thermal pressure. The difference here from rt/dl utilization tracking is that, instead of tracking time spent by a CPU running a RT/DL task through util_avg, the average thermal pressure is tracked through load_avg. This is because thermal pressure signal is weighted time "delta" capacity unlike util_avg which is binary. "delta capacity" here means delta between the actual capacity of a CPU and the decreased capacity a CPU due to a thermal event. In order to track average thermal pressure, a new sched_avg variable avg_thermal is introduced. Function update_thermal_load_avg can be called to do the periodic bookkeeping (accumulate, decay and average) of the thermal pressure. Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20200222005213.3873-2-thara.gopinath@linaro.org |
|
|
Quentin Perret
|
1518c633df |
kbuild: allow symbol whitelisting with TRIM_UNUSED_KSYMS
CONFIG_TRIM_UNUSED_KSYMS currently removes all unused exported symbols from ksymtab. This works really well when using in-tree drivers, but cannot be used in its current form if some of them are out-of-tree. Indeed, even if the list of symbols required by out-of-tree drivers is known at compile time, the only solution today to guarantee these don't get trimmed is to set CONFIG_TRIM_UNUSED_KSYMS=n. This not only wastes space, but also makes it difficult to control the ABI usable by vendor modules in distribution kernels such as Android. Being able to control the kernel ABI surface is particularly useful to ship a unique Generic Kernel Image (GKI) for all vendors, which is a first step in the direction of getting all vendors to contribute their code upstream. As such, attempt to improve the situation by enabling users to specify a symbol 'whitelist' at compile time. Any symbol specified in this whitelist will be kept exported when CONFIG_TRIM_UNUSED_KSYMS is set, even if it has no in-tree user. The whitelist is defined as a simple text file, listing symbols, one per line. Acked-by: Jessica Yu <jeyu@kernel.org> Acked-by: Nicolas Pitre <nico@fluxnic.net> Tested-by: Matthias Maennich <maennich@google.com> Reviewed-by: Matthias Maennich <maennich@google.com> Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
|
|
Masahiro Yamada
|
2a86f66121 |
kbuild: use KBUILD_DEFCONFIG as the fallback for DEFCONFIG_LIST
Most of the Kconfig commands (except defconfig and all*config) read
the .config file as a base set of CONFIG options.
When it does not exist, the files in DEFCONFIG_LIST are searched in
this order and loaded if found.
I do not see much sense in the last two lines in DEFCONFIG_LIST.
[1] ARCH_DEFCONFIG
The entry for DEFCONFIG_LIST is guarded by 'depends on !UML'. So, the
ARCH_DEFCONFIG definition in arch/x86/um/Kconfig is meaningless.
arch/{sh,sparc,x86}/Kconfig define ARCH_DEFCONFIG depending on 32 or
64 bit variant symbols. This is a little bit strange; ARCH_DEFCONFIG
should be a fixed string because the base config file is loaded before
the symbol evaluation stage.
Using KBUILD_DEFCONFIG makes more sense because it is fixed before
Kconfig is invoked. Fortunately, arch/{sh,sparc,x86}/Makefile define it
in the same way, and it works as expected. Hence, replace ARCH_DEFCONFIG
with "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)".
[2] arch/$(ARCH)/defconfig
This file path is no longer valid. The defconfig files are always located
in the arch configs/ directories.
$ find arch -name defconfig | sort
arch/alpha/configs/defconfig
arch/arm64/configs/defconfig
arch/csky/configs/defconfig
arch/nds32/configs/defconfig
arch/riscv/configs/defconfig
arch/s390/configs/defconfig
arch/unicore32/configs/defconfig
The path arch/*/configs/defconfig is already covered by
"arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)". So, this file path is
not necessary.
I moved the default KBUILD_DEFCONFIG to the top Makefile. Otherwise,
the 7 architectures listed above would end up with endless loop of
syncconfig.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
|
|
|
Linus Torvalds
|
91ad64a84e |
Tracing updates:
Change in API of bootconfig (before it comes live in a release)
- Have a magic value "BOOTCONFIG" in initrd to know a bootconfig exists
- Set CONFIG_BOOT_CONFIG to 'n' by default
- Show error if "bootconfig" on cmdline but not compiled in
- Prevent redefining the same value
- Have a way to append values
- Added a SELECT BLK_DEV_INITRD to fix a build failure
Synthetic event fixes:
- Switch to raw_smp_processor_id() for recording CPU value in preempt
section. (No care for what the value actually is)
- Fix samples always recording u64 values
- Fix endianess
- Check number of values matches number of fields
- Fix a printing bug
Fix of trace_printk() breaking postponed start up tests
Make a function static that is only used in a single file.
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCXlW4vxQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qtioAP0WLEm3dWO0z3321h/a0DSshC+Bslu3
HDPTsGVGrXmvggEA/lr1ikRHd8PsO7zW8BfaZMxoXaTqXiuSrzEWxnMlFw0=
=O8PM
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing and bootconfig updates:
"Fixes and changes to bootconfig before it goes live in a release.
Change in API of bootconfig (before it comes live in a release):
- Have a magic value "BOOTCONFIG" in initrd to know a bootconfig
exists
- Set CONFIG_BOOT_CONFIG to 'n' by default
- Show error if "bootconfig" on cmdline but not compiled in
- Prevent redefining the same value
- Have a way to append values
- Added a SELECT BLK_DEV_INITRD to fix a build failure
Synthetic event fixes:
- Switch to raw_smp_processor_id() for recording CPU value in preempt
section. (No care for what the value actually is)
- Fix samples always recording u64 values
- Fix endianess
- Check number of values matches number of fields
- Fix a printing bug
Fix of trace_printk() breaking postponed start up tests
Make a function static that is only used in a single file"
* tag 'trace-v5.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
bootconfig: Fix CONFIG_BOOTTIME_TRACING dependency issue
bootconfig: Add append value operator support
bootconfig: Prohibit re-defining value on same key
bootconfig: Print array as multiple commands for legacy command line
bootconfig: Reject subkey and value on same parent key
tools/bootconfig: Remove unneeded error message silencer
bootconfig: Add bootconfig magic word for indicating bootconfig explicitly
bootconfig: Set CONFIG_BOOT_CONFIG=n by default
tracing: Clear trace_state when starting trace
bootconfig: Mark boot_config_checksum() static
tracing: Disable trace_printk() on post poned tests
tracing: Have synthetic event test use raw_smp_processor_id()
tracing: Fix number printing bug in print_synth_event()
tracing: Check that number of vals matches number of synth event fields
tracing: Make synth_event trace functions endian-correct
tracing: Make sure synth_event_trace() example always uses u64
|
|
|
Masami Hiramatsu
|
2910b5aa6f |
bootconfig: Fix CONFIG_BOOTTIME_TRACING dependency issue
Since commit |
|
|
Masami Hiramatsu
|
85c46b78da |
bootconfig: Add bootconfig magic word for indicating bootconfig explicitly
Add bootconfig magic word to the end of bootconfig on initrd image for indicating explicitly the bootconfig is there. Also tools/bootconfig treats wrong size or wrong checksum or parse error as an error, because if there is a bootconfig magic word, there must be a bootconfig. The bootconfig magic word is "#BOOTCONFIG\n", 12 bytes word. Thus the block image of the initrd file with bootconfig is as follows. [Initrd][bootconfig][size][csum][#BOOTCONFIG\n] Link: http://lkml.kernel.org/r/158220112263.26565.3944814205960612841.stgit@devnote2 Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
|
|
Masami Hiramatsu
|
d8a953ddde |
bootconfig: Set CONFIG_BOOT_CONFIG=n by default
Set CONFIG_BOOT_CONFIG=n by default. This also warns user if CONFIG_BOOT_CONFIG=n but "bootconfig" is given in the kernel command line. Link: http://lkml.kernel.org/r/158220111291.26565.9036889083940367969.stgit@devnote2 Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
|
|
Linus Torvalds
|
61a7595403 |
Various fixes:
- Fix an uninitialized variable
- Fix compile bug to bootconfig userspace tool (in tools directory)
- Suppress some error messages of bootconfig userspace tool
- Remove unneded CONFIG_LIBXBC from bootconfig
- Allocate bootconfig xbc_nodes dynamically.
To ease complaints about taking up static memory at boot up
- Use of parse_args() to parse bootconfig instead of strstr() usage
Prevents issues of double quotes containing the interested string
- Fix missing ring_buffer_nest_end() on synthetic event error path
- Return zero not -EINVAL on soft disabled synthetic event
(soft disabling must be the same as hard disabling, which returns zero)
- Consolidate synthetic event code (remove duplicate code)
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCXkMTwRQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qnJQAQD5aKiD6jx+zGtLsFTuZMcEGvhhUuJ6
oUaSvhKO3UqezwD/V5avKuuC0wWt//gOWDY+0+4QNjmvn1GLnaNYohs6fg0=
=NLT9
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"Various fixes:
- Fix an uninitialized variable
- Fix compile bug to bootconfig userspace tool (in tools directory)
- Suppress some error messages of bootconfig userspace tool
- Remove unneded CONFIG_LIBXBC from bootconfig
- Allocate bootconfig xbc_nodes dynamically. To ease complaints about
taking up static memory at boot up
- Use of parse_args() to parse bootconfig instead of strstr() usage
Prevents issues of double quotes containing the interested string
- Fix missing ring_buffer_nest_end() on synthetic event error path
- Return zero not -EINVAL on soft disabled synthetic event (soft
disabling must be the same as hard disabling, which returns zero)
- Consolidate synthetic event code (remove duplicate code)"
* tag 'trace-v5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Consolidate trace() functions
tracing: Don't return -EINVAL when tracing soft disabled synth events
tracing: Add missing nest end to synth_event_trace_start() error case
tools/bootconfig: Suppress non-error messages
bootconfig: Allocate xbc_nodes array dynamically
bootconfig: Use parse_args() to find bootconfig and '--'
tracing/kprobe: Fix uninitialized variable bug
bootconfig: Remove unneeded CONFIG_LIBXBC
tools/bootconfig: Fix wrong __VA_ARGS__ usage
|