11 Nov, 2020
1 commit
-
Commit b2b29d6d0119 ("mm: account PMD tables like PTE tables") uncovered
a bug in uml, we forgot to call the destructor.
While we are here, give x a sane name.Reported-by: Anton Ivanov
Co-developed-by: Matthew Wilcox (Oracle)
Signed-off-by: Richard Weinberger
Tested-by: Christopher Obbard
26 Oct, 2020
1 commit
-
Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.Remove the quote operator # from compiler_attributes.h __section macro.
Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.Conversion done using the script at:
https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl
Signed-off-by: Joe Perches
Reviewed-by: Nick Desaulniers
Reviewed-by: Miguel Ojeda
Signed-off-by: Linus Torvalds
24 Sep, 2020
1 commit
-
There was a request to preprocess the module linker script like we
do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512)The difference between vmlinux.lds and module.lds is that the latter
is needed for external module builds, thus must be cleaned up by
'make mrproper' instead of 'make clean'. Also, it must be created
by 'make modules_prepare'.You cannot put it in arch/$(SRCARCH)/kernel/, which is cleaned up by
'make clean'. I moved arch/$(SRCARCH)/kernel/module.lds to
arch/$(SRCARCH)/include/asm/module.lds.h, which is included from
scripts/module.lds.S.scripts/module.lds is fine because 'make clean' keeps all the
build artifacts under scripts/.You can add arch-specific sections in .
Signed-off-by: Masahiro Yamada
Tested-by: Jessica Yu
Acked-by: Will Deacon
Acked-by: Geert Uytterhoeven
Acked-by: Palmer Dabbelt
Reviewed-by: Kees Cook
Acked-by: Jessica Yu
08 Aug, 2020
2 commits
-
Most architectures define pgd_free() as a wrapper for free_page().
Provide a generic version in asm-generic/pgalloc.h and enable its use for
most architectures.Signed-off-by: Mike Rapoport
Signed-off-by: Andrew Morton
Reviewed-by: Pekka Enberg
Acked-by: Geert Uytterhoeven [m68k]
Cc: Abdul Haleem
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Christophe Leroy
Cc: Joerg Roedel
Cc: Joerg Roedel
Cc: Max Filippov
Cc: Peter Zijlstra (Intel)
Cc: Satheesh Rajendran
Cc: Stafford Horne
Cc: Stephen Rothwell
Cc: Steven Rostedt
Cc: Matthew Wilcox
Link: http://lkml.kernel.org/r/20200627143453.31835-7-rppt@kernel.org
Signed-off-by: Linus Torvalds -
For most architectures that support >2 levels of page tables,
pmd_alloc_one() is a wrapper for __get_free_pages(), sometimes with
__GFP_ZERO and sometimes followed by memset(0) instead.More elaborate versions on arm64 and x86 account memory for the user page
tables and call to pgtable_pmd_page_ctor() as the part of PMD page
initialization.Move the arm64 version to include/asm-generic/pgalloc.h and use the
generic version on several architectures.The pgtable_pmd_page_ctor() is a NOP when ARCH_ENABLE_SPLIT_PMD_PTLOCK is
not enabled, so there is no functional change for most architectures
except of the addition of __GFP_ACCOUNT for allocation of user page
tables.The pmd_free() is a wrapper for free_page() in all the cases, so no
functional change here.Signed-off-by: Mike Rapoport
Signed-off-by: Andrew Morton
Reviewed-by: Pekka Enberg
Cc: Matthew Wilcox
Cc: Abdul Haleem
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Christophe Leroy
Cc: Joerg Roedel
Cc: Joerg Roedel
Cc: Max Filippov
Cc: Peter Zijlstra (Intel)
Cc: Satheesh Rajendran
Cc: Stafford Horne
Cc: Stephen Rothwell
Cc: Steven Rostedt
Cc: Geert Uytterhoeven
Link: http://lkml.kernel.org/r/20200627143453.31835-5-rppt@kernel.org
Signed-off-by: Linus Torvalds
10 Jun, 2020
4 commits
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Add API for nested write locks and convert the few call sites doing that.
Signed-off-by: Michel Lespinasse
Signed-off-by: Andrew Morton
Reviewed-by: Daniel Jordan
Reviewed-by: Laurent Dufour
Reviewed-by: Vlastimil Babka
Cc: Davidlohr Bueso
Cc: David Rientjes
Cc: Hugh Dickins
Cc: Jason Gunthorpe
Cc: Jerome Glisse
Cc: John Hubbard
Cc: Liam Howlett
Cc: Matthew Wilcox
Cc: Peter Zijlstra
Cc: Ying Han
Link: http://lkml.kernel.org/r/20200520052908.204642-7-walken@google.com
Signed-off-by: Linus Torvalds -
This change converts the existing mmap_sem rwsem calls to use the new mmap
locking API instead.The change is generated using coccinelle with the following rule:
// spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir .
@@
expression mm;
@@
(
-init_rwsem
+mmap_init_lock
|
-down_write
+mmap_write_lock
|
-down_write_killable
+mmap_write_lock_killable
|
-down_write_trylock
+mmap_write_trylock
|
-up_write
+mmap_write_unlock
|
-downgrade_write
+mmap_write_downgrade
|
-down_read
+mmap_read_lock
|
-down_read_killable
+mmap_read_lock_killable
|
-down_read_trylock
+mmap_read_trylock
|
-up_read
+mmap_read_unlock
)
-(&mm->mmap_sem)
+(mm)Signed-off-by: Michel Lespinasse
Signed-off-by: Andrew Morton
Reviewed-by: Daniel Jordan
Reviewed-by: Laurent Dufour
Reviewed-by: Vlastimil Babka
Cc: Davidlohr Bueso
Cc: David Rientjes
Cc: Hugh Dickins
Cc: Jason Gunthorpe
Cc: Jerome Glisse
Cc: John Hubbard
Cc: Liam Howlett
Cc: Matthew Wilcox
Cc: Peter Zijlstra
Cc: Ying Han
Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com
Signed-off-by: Linus Torvalds -
All architectures define pte_index() as
(address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)
and all architectures define pte_offset_kernel() as an entry in the array
of PTEs indexed by the pte_index().For the most architectures the pte_offset_kernel() implementation relies
on the availability of pmd_page_vaddr() that converts a PMD entry value to
the virtual address of the page containing PTEs array.Let's move x86 definitions of the PTE accessors to the generic place in
and then simply drop the respective definitions from the
other architectures.The architectures that didn't provide pmd_page_vaddr() are updated to have
that defined.The generic implementation of pte_offset_kernel() can be overridden by an
architecture and alpha makes use of this because it has special ordering
requirements for its version of pte_offset_kernel().[rppt@linux.ibm.com: v2]
Link: http://lkml.kernel.org/r/20200514170327.31389-11-rppt@kernel.org
[rppt@linux.ibm.com: update]
Link: http://lkml.kernel.org/r/20200514170327.31389-12-rppt@kernel.org
[rppt@linux.ibm.com: update]
Link: http://lkml.kernel.org/r/20200514170327.31389-13-rppt@kernel.org
[akpm@linux-foundation.org: fix x86 warning]
[sfr@canb.auug.org.au: fix powerpc build]
Link: http://lkml.kernel.org/r/20200607153443.GB738695@linux.ibm.comSigned-off-by: Mike Rapoport
Signed-off-by: Stephen Rothwell
Signed-off-by: Andrew Morton
Cc: Arnd Bergmann
Cc: Borislav Petkov
Cc: Brian Cain
Cc: Catalin Marinas
Cc: Chris Zankel
Cc: "David S. Miller"
Cc: Geert Uytterhoeven
Cc: Greentime Hu
Cc: Greg Ungerer
Cc: Guan Xuetao
Cc: Guo Ren
Cc: Heiko Carstens
Cc: Helge Deller
Cc: Ingo Molnar
Cc: Ley Foon Tan
Cc: Mark Salter
Cc: Matthew Wilcox
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Nick Hu
Cc: Paul Walmsley
Cc: Richard Weinberger
Cc: Rich Felker
Cc: Russell King
Cc: Stafford Horne
Cc: Thomas Bogendoerfer
Cc: Thomas Gleixner
Cc: Tony Luck
Cc: Vincent Chen
Cc: Vineet Gupta
Cc: Will Deacon
Cc: Yoshinori Sato
Link: http://lkml.kernel.org/r/20200514170327.31389-10-rppt@kernel.org
Signed-off-by: Linus Torvalds -
The include/linux/pgtable.h is going to be the home of generic page table
manipulation functions.Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and
make the latter include asm/pgtable.h.Signed-off-by: Mike Rapoport
Signed-off-by: Andrew Morton
Cc: Arnd Bergmann
Cc: Borislav Petkov
Cc: Brian Cain
Cc: Catalin Marinas
Cc: Chris Zankel
Cc: "David S. Miller"
Cc: Geert Uytterhoeven
Cc: Greentime Hu
Cc: Greg Ungerer
Cc: Guan Xuetao
Cc: Guo Ren
Cc: Heiko Carstens
Cc: Helge Deller
Cc: Ingo Molnar
Cc: Ley Foon Tan
Cc: Mark Salter
Cc: Matthew Wilcox
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Nick Hu
Cc: Paul Walmsley
Cc: Richard Weinberger
Cc: Rich Felker
Cc: Russell King
Cc: Stafford Horne
Cc: Thomas Bogendoerfer
Cc: Thomas Gleixner
Cc: Tony Luck
Cc: Vincent Chen
Cc: Vineet Gupta
Cc: Will Deacon
Cc: Yoshinori Sato
Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org
Signed-off-by: Linus Torvalds
09 Jun, 2020
1 commit
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This seems to lead to some crazy include loops when using
asm-generic/cacheflush.h on more architectures, so leave it to the arch
header for now.[hch@lst.de: fix warning]
Link: http://lkml.kernel.org/r/20200520173520.GA11199@lst.deSigned-off-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Cc: Will Deacon
Cc: Nick Piggin
Cc: Peter Zijlstra
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Anton Ivanov
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: "H. Peter Anvin"
Cc: Dan Williams
Cc: Vishal Verma
Cc: Dave Jiang
Cc: Keith Busch
Cc: Ira Weiny
Cc: Arnd Bergmann
Link: http://lkml.kernel.org/r/20200515143646.3857579-7-hch@lst.de
Signed-off-by: Linus Torvalds
30 Apr, 2020
1 commit
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Two independent changes here ended up going into the tree
one after another, without a necessary rename, fix that.Reported-by: Thomas Meyer
Fixes: f185063bff91 ("um: Move timer-internal.h to non-shared")
Signed-off-by: Johannes Berg
Reviewed-by: Brendan Higgins
Signed-off-by: Richard Weinberger
11 Apr, 2020
1 commit
-
Currently there are many platforms that dont enable ARCH_HAS_PTE_SPECIAL
but required to define quite similar fallback stubs for special page
table entry helpers such as pte_special() and pte_mkspecial(), as they
get build in generic MM without a config check. This creates two
generic fallback stub definitions for these helpers, eliminating much
code duplication.mips platform has a special case where pte_special() and pte_mkspecial()
visibility is wider than what ARCH_HAS_PTE_SPECIAL enablement requires.
This restricts those symbol visibility in order to avoid redefinitions
which is now exposed through this new generic stubs and subsequent build
failure. arm platform set_pte_at() definition needs to be moved into a
C file just to prevent a build failure.[anshuman.khandual@arm.com: use defined(CONFIG_ARCH_HAS_PTE_SPECIAL) in mips per Thomas]
Link: http://lkml.kernel.org/r/1583851924-21603-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual
Signed-off-by: Andrew Morton
Acked-by: Guo Ren [csky]
Acked-by: Geert Uytterhoeven [m68k]
Acked-by: Stafford Horne [openrisc]
Acked-by: Helge Deller [parisc]
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Cc: Russell King
Cc: Brian Cain
Cc: Tony Luck
Cc: Fenghua Yu
Cc: Sam Creasey
Cc: Michal Simek
Cc: Ralf Baechle
Cc: Paul Burton
Cc: Nick Hu
Cc: Greentime Hu
Cc: Vincent Chen
Cc: Ley Foon Tan
Cc: Jonas Bonn
Cc: Stefan Kristiansson
Cc: "James E.J. Bottomley"
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Anton Ivanov
Cc: Guan Xuetao
Cc: Chris Zankel
Cc: Max Filippov
Cc: Thomas Bogendoerfer
Link: http://lkml.kernel.org/r/1583802551-15406-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Linus Torvalds
30 Mar, 2020
4 commits
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In external or inf-cpu time-travel mode, ndelay/udelay currently
just waste CPU time since the simulation time doesn't advance.
Implement them properly in this case.Note that the "if (time_travel_mode == ...)" parts compile out
if CONFIG_UML_TIME_TRAVEL_SUPPORT isn't set, time_travel_mode is
defined to TT_MODE_OFF in that case.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
This implements synchronized time-travel mode which - using a special
application on a unix socket - lets multiple machines take part in a
time-travelling simulation together.The protocol for the unix domain socket is defined in the new file
include/uapi/linux/um_timetravel.h.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
Instead of tracking all the various timer configurations,
modify the time-travel mode to have an event scheduler and
use a timer event on the scheduler to handle the different
timer configurations.This doesn't change the function right now, but it prepares
the code for having different kinds of events in the future
(i.e. interrupts coming from other devices that are part of
co-simulation.)While at it, also move time_travel_sleep() to time.c to
reduce the externally visible API surface.Also, we really should mark time-travel as incompatible with
SMP, even if UML doesn't support SMP yet.Finally, I noticed a bug while developing this - if we move
time forward due to consuming time while reading the clock,
we might move across the next event and that would cause us
to go backward in time when we then handle that event. Fix
that by invoking the whole event machine in this case, but
in order to simplify this, make reading the clock only cost
something when interrupts are not disabled. Otherwise, we'd
have to hook into the interrupt delivery machinery etc. and
that's somewhat intrusive.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
This file isn't really shared, it's only used on the kernel side,
not on the user side. Remove the include from the user-side and
move the file to a better place.While at it, rename it to time-internal.h, it's not really just
timers but all kinds of things related to timekeeping.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger
31 Jan, 2020
1 commit
-
Pull x86 MPX removal from Dave Hansen:
"MPX requires recompiling applications, which requires compiler
support. Unfortunately, GCC 9.1 is expected to be be released without
support for MPX. This means that there was only a relatively small
window where folks could have ever used MPX. It failed to gain wide
adoption in the industry, and Linux was the only mainstream OS to ever
support it widely.Support for the feature may also disappear on future processors.
This set completes the process that we started during the 5.4 merge
window when the MPX prctl()s were removed. XSAVE support is left in
place, which allows MPX-using KVM guests to continue to function"* tag 'mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx:
x86/mpx: remove MPX from arch/x86
mm: remove arch_bprm_mm_init() hook
x86/mpx: remove bounds exception code
x86/mpx: remove build infrastructure
x86/alternatives: add missing insn.h include
30 Jan, 2020
1 commit
-
…/kernel/git/arnd/playground
Pull y2038 updates from Arnd Bergmann:
"Core, driver and file system changesThese are updates to device drivers and file systems that for some
reason or another were not included in the kernel in the previous
y2038 series.I've gone through all users of time_t again to make sure the kernel is
in a long-term maintainable state, replacing all remaining references
to time_t with safe alternatives.Some related parts of the series were picked up into the nfsd, xfs,
alsa and v4l2 trees. A final set of patches in linux-mm removes the
now unused time_t/timeval/timespec types and helper functions after
all five branches are merged for linux-5.6, ensuring that no new users
get merged.As a result, linux-5.6, or my backport of the patches to 5.4 [1],
should be the first release that can serve as a base for a 32-bit
system designed to run beyond year 2038, with a few remaining caveats:- All user space must be compiled with a 64-bit time_t, which will be
supported in the coming musl-1.2 and glibc-2.32 releases, along
with installed kernel headers from linux-5.6 or higher.- Applications that use the system call interfaces directly need to
be ported to use the time64 syscalls added in linux-5.1 in place of
the existing system calls. This impacts most users of futex() and
seccomp() as well as programming languages that have their own
runtime environment not based on libc.- Applications that use a private copy of kernel uapi header files or
their contents may need to update to the linux-5.6 version, in
particular for sound/asound.h, xfs/xfs_fs.h, linux/input.h,
linux/elfcore.h, linux/sockios.h, linux/timex.h and
linux/can/bcm.h.- A few remaining interfaces cannot be changed to pass a 64-bit
time_t in a compatible way, so they must be configured to use
CLOCK_MONOTONIC times or (with a y2106 problem) unsigned 32-bit
timestamps. Most importantly this impacts all users of 'struct
input_event'.- All y2038 problems that are present on 64-bit machines also apply
to 32-bit machines. In particular this affects file systems with
on-disk timestamps using signed 32-bit seconds: ext4 with
ext3-style small inodes, ext2, xfs (to be fixed soon) and ufs"[1] https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=y2038-endgame
* tag 'y2038-drivers-for-v5.6-signed' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground: (21 commits)
Revert "drm/etnaviv: reject timeouts with tv_nsec >= NSEC_PER_SEC"
y2038: sh: remove timeval/timespec usage from headers
y2038: sparc: remove use of struct timex
y2038: rename itimerval to __kernel_old_itimerval
y2038: remove obsolete jiffies conversion functions
nfs: fscache: use timespec64 in inode auxdata
nfs: fix timstamp debug prints
nfs: use time64_t internally
sunrpc: convert to time64_t for expiry
drm/etnaviv: avoid deprecated timespec
drm/etnaviv: reject timeouts with tv_nsec >= NSEC_PER_SEC
drm/msm: avoid using 'timespec'
hfs/hfsplus: use 64-bit inode timestamps
hostfs: pass 64-bit timestamps to/from user space
packet: clarify timestamp overflow
tsacct: add 64-bit btime field
acct: stop using get_seconds()
um: ubd: use 64-bit time_t where possible
xtensa: ISS: avoid struct timeval
dlm: use SO_SNDTIMEO_NEW instead of SO_SNDTIMEO_OLD
...
29 Jan, 2020
1 commit
-
Pull UML updates from Anton Ivanov:
"I am sending this on behalf of Richard who is traveling.This contains the following changes for UML:
- Fix for time travel mode
- Disable CONFIG_CONSTRUCTORS again
- A new command line option to have an non-raw serial line
- Preparations to remove obsolete UML network drivers"
* tag 'for-linus-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: Fix time-travel=inf-cpu with xor/raid6
Revert "um: Enable CONFIG_CONSTRUCTORS"
um: Mark non-vector net transports as obsolete
um: Add an option to make serial driver non-raw
24 Jan, 2020
1 commit
-
From: Dave Hansen
MPX is being removed from the kernel due to a lack of support
in the toolchain going forward (gcc).arch_bprm_mm_init() is used at execve() time. The only non-stub
implementation is on x86 for MPX. Remove the hook entirely from
all architectures and generic code.Cc: Peter Zijlstra (Intel)
Cc: Andy Lutomirski
Cc: x86@kernel.org
Cc: Linus Torvalds
Cc: linux-arch@vger.kernel.org
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Anton Ivanov
Cc: Guan Xuetao
Cc: Andrew Morton
Signed-off-by: Dave Hansen
20 Jan, 2020
3 commits
-
Signed-off-by: Ingo Molnar
-
Today, I erroneously built a time-travel configuration with btrfs
enabled, and noticed it cannot boot in time-travel=inf-cpu mode,
both xor and raid6 speed measurement gets stuck.For xor, work around it by picking the first algorithm if inf-cpu
mode is enabled.For raid6, I didn't find such a workaround, so disallow enabling
time-travel mode if RAID6_PQ_BENCHMARK is enabled.With this, and RAID6_PQ_BENCHMARK disabled, I can boot a kernel
that has btrfs enabled in time-travel=inf-cpu mode.Signed-off-by: Johannes Berg
Acked-by: Anton Ivanov
Signed-off-by: Richard Weinberger -
This reverts commit 786b2384bf1c ("um: Enable CONFIG_CONSTRUCTORS").
There are two issues with this commit, uncovered by Anton in tests
on some (Debian) systems:1) I completely forgot to call any constructors if CONFIG_CONSTRUCTORS
isn't set. Don't recall now if it just wasn't needed on my system, or
if I never tested this case.2) With that fixed, it works - with CONFIG_CONSTRUCTORS *unset*. If I
set CONFIG_CONSTRUCTORS, it fails again, which isn't totally
unexpected since whatever wanted to run is likely to have to run
before the kernel init etc. that calls the constructors in this case.Basically, some constructors that gcc emits (libc has?) need to run
very early during init; the failure mode otherwise was that the ptrace
fork test already failed:----------------------
$ ./linux mem=512M
Core dump limits :
soft - 0
hard - NONE
Checking that ptrace can change system call numbers...check_ptrace : child exited with exitcode 6, while expecting 0; status 0x67f
Aborted
----------------------Thinking more about this, it's clear that we simply cannot support
CONFIG_CONSTRUCTORS in UML. All the cases we need now (gcov, kasan)
involve not use of the __attribute__((constructor)), but instead
some constructor code/entry generated by gcc. Therefore, we cannot
distinguish between kernel constructors and system constructors.Thus, revert this commit.
Cc: stable@vger.kernel.org [5.4+]
Fixes: 786b2384bf1c ("um: Enable CONFIG_CONSTRUCTORS")
Reported-by: Anton Ivanov
Signed-off-by: Johannes Berg
Acked-by: Anton IvanovSigned-off-by: Richard Weinberger
07 Jan, 2020
1 commit
-
This is required for clone3 which passes the TLS value through a
struct rather than a register.Signed-off-by: Amanieu d'Antras
Cc: linux-um@lists.infradead.org
Cc: # 5.3.x
Link: https://lore.kernel.org/r/20200104123928.1048822-1-amanieu@gmail.com
Signed-off-by: Christian Brauner
19 Dec, 2019
1 commit
-
The ubd code suffers from a possible y2038 overflow on 32-bit
architectures, both for the cow header and the os_file_modtime()
function.Replace time_t with time64_t to extend the ubd_kern side as much
as possible.Whether this makes a difference for the user side depends on
the host libc implementation that may use either 32-bit or 64-bit
time_t.For the cow file format, the header contains an unsigned 32-bit
timestamp, which is good until y2106, passing this through a
'long long' gives us a consistent interpretation between 32-bit
and 64-bit um kernels.Signed-off-by: Arnd Bergmann
10 Dec, 2019
1 commit
-
In the x86 MM code we'd like to untangle various types of historic
header dependency spaghetti, but for this we'd need to pass to
the generic vmalloc code various vmalloc related defines that
customarily come via the low level arch header.Signed-off-by: Ingo Molnar
05 Dec, 2019
1 commit
-
The UML port uses 4 and 5 level fixups to support higher level page
table directories in the generic VM code.Implement primitives necessary for the 4th level folding, add walks of
p4d level where appropriate and drop usage of __ARCH_USE_5LEVEL_HACK.Link: http://lkml.kernel.org/r/1572938135-31886-13-git-send-email-rppt@kernel.org
Signed-off-by: Mike Rapoport
Cc: Anatoly Pugachev
Cc: Anton Ivanov
Cc: Arnd Bergmann
Cc: "David S. Miller"
Cc: Geert Uytterhoeven
Cc: Greentime Hu
Cc: Greg Ungerer
Cc: Helge Deller
Cc: "James E.J. Bottomley"
Cc: Jeff Dike
Cc: "Kirill A. Shutemov"
Cc: Mark Salter
Cc: Matt Turner
Cc: Michal Simek
Cc: Peter Rosin
Cc: Richard Weinberger
Cc: Rolf Eike Beer
Cc: Russell King
Cc: Russell King
Cc: Sam Creasey
Cc: Vincent Chen
Cc: Vineet Gupta
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Nov, 2019
2 commits
-
There's no reason to keep the RODATA macro: replace the callers with
the expected RO_DATA macro.Signed-off-by: Kees Cook
Signed-off-by: Borislav Petkov
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Dave Hansen
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Rick Edgecombe
Cc: Segher Boessenkool
Cc: Will Deacon
Cc: x86-ml
Cc: Yoshinori Sato
Link: https://lkml.kernel.org/r/20191029211351.13243-12-keescook@chromium.org -
The .notes section should be non-executable read-only data. As such,
move it to the RO_DATA macro instead of being per-architecture defined.Signed-off-by: Kees Cook
Signed-off-by: Borislav Petkov
Acked-by: Heiko Carstens # s390
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Dave Hansen
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Rick Edgecombe
Cc: Segher Boessenkool
Cc: Will Deacon
Cc: x86-ml
Cc: Yoshinori Sato
Link: https://lkml.kernel.org/r/20191029211351.13243-11-keescook@chromium.org
27 Sep, 2019
1 commit
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The naming of pgtable_page_{ctor,dtor}() seems to have confused a few
people, and until recently arm64 used these erroneously/pointlessly for
other levels of page table.To make it incredibly clear that these only apply to the PTE level, and to
align with the naming of pgtable_pmd_page_{ctor,dtor}(), let's rename them
to pgtable_pte_page_{ctor,dtor}().These changes were generated with the following shell script:
----
git grep -lw 'pgtable_page_.tor' | while read FILE; do
sed -i '{s/pgtable_page_ctor/pgtable_pte_page_ctor/}' $FILE;
sed -i '{s/pgtable_page_dtor/pgtable_pte_page_dtor/}' $FILE;
done
----... with the documentation re-flowed to remain under 80 columns, and
whitespace fixed up in macros to keep backslashes aligned.There should be no functional change as a result of this patch.
Link: http://lkml.kernel.org/r/20190722141133.3116-1-mark.rutland@arm.com
Signed-off-by: Mark Rutland
Reviewed-by: Mike Rapoport
Acked-by: Geert Uytterhoeven [m68k]
Cc: Anshuman Khandual
Cc: Matthew Wilcox
Cc: Michal Hocko
Cc: Yu Zhao
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Sep, 2019
2 commits
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Both pgtable_cache_init() and pgd_cache_init() are used to initialize kmem
cache for page table allocations on several architectures that do not use
PAGE_SIZE tables for one or more levels of the page table hierarchy.Most architectures do not implement these functions and use __weak default
NOP implementation of pgd_cache_init(). Since there is no such default
for pgtable_cache_init(), its empty stub is duplicated among most
architectures.Rename the definitions of pgd_cache_init() to pgtable_cache_init() and
drop empty stubs of pgtable_cache_init().Link: http://lkml.kernel.org/r/1566457046-22637-1-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport
Acked-by: Will Deacon [arm64]
Acked-by: Thomas Gleixner [x86]
Cc: Catalin Marinas
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: Matthew Wilcox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Patch series "mm: remove quicklist page table caches".
A while ago Nicholas proposed to remove quicklist page table caches [1].
I've rebased his patch on the curren upstream and switched ia64 and sh to
use generic versions of PTE allocation.[1] https://lore.kernel.org/linux-mm/20190711030339.20892-1-npiggin@gmail.com
This patch (of 3):
Remove page table allocator "quicklists". These have been around for a
long time, but have not got much traction in the last decade and are only
used on ia64 and sh architectures.The numbers in the initial commit look interesting but probably don't
apply anymore. If anybody wants to resurrect this it's in the git
history, but it's unhelpful to have this code and divergent allocator
behaviour for minor archs.Also it might be better to instead make more general improvements to page
allocator if this is still so slow.Link: http://lkml.kernel.org/r/1565250728-21721-2-git-send-email-rppt@linux.ibm.com
Signed-off-by: Nicholas Piggin
Signed-off-by: Mike Rapoport
Cc: Tony Luck
Cc: Yoshinori Sato
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Sep, 2019
8 commits
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Convert files to use SPDX header. All files are licensed under the GPLv2.
Signed-off-by: Alex Dewar
Signed-off-by: Richard Weinberger -
This module allows virtio devices to be used over a vhost-user socket.
Signed-off-by: Erel Geron
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
UML has its own platform-specific barrier.h under arch/x86/um/,
which should get used. Fix the build system to use it, and then
fix the barrier.h to actually compile.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
Periodic timers are broken, because the also only fire once.
As it happens, Linux doesn't care because it only sets the
timer to periodic very briefly during boot, and then switches
it only between one-shot and off later.Nevertheless, fix the logic (we shouldn't even be looking at
time_travel_timer_expiry unless the timer is enabled) and
change the code to fire the timer periodically in periodic
mode, in case it ever gets used in the future.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
We do need to call the constructors for *modules*, and
at least for KASAN in the future, we must call even the
kernel constructors only later when the kernel has been
initialized.Instead of relying on libc to call them, emit an empty
section for libc and let the kernel's CONSTRUCTORS code
do the rest of the job.Tested that it indeed doesn't work in modules, and does
work after the fixes in both, with a few functions with
__attribute__((constructor)) in both dynamic and static
builds.Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
UML enables TRACE_IRQFLAGS_SUPPORT but doesn't actually implement
it. It seems to have been added for lockdep support, but that can't
actually really work well without IRQ flags tracing, as is also
very noisily reported when enabling CONFIG_DEBUG_LOCKDEP.Implement it now.
Fixes: 711553efa5b8 ("[PATCH] uml: declare in Kconfig our partial LOCKDEP support")
Signed-off-by: Johannes Berg
Signed-off-by: Richard Weinberger -
Due to the typo in the name, this can never be used, but
it's also misleading because our value for enabled/disabled
is always just 0/1, not an actual signal mask.Signed-off-by: Johannes Berg
Acked-by: Anton Ivanov
Signed-off-by: Richard Weinberger -
Fix an off-by-one in IRQ enumeration
Fixes: 49da7e64f33e ("High Performance UML Vector Network Driver")
Reported by: Dana Johnson
Signed-off-by: Anton Ivanov
Signed-off-by: Richard Weinberger
