11 Jul, 2018
1 commit
-
Exception return implies context synchronization, so we can hook up the
SYNC_CORE option to sys_membarrier() simply by selecting the Kconfig option,
just like we've done for arm64 already.Cc: Orion Hodson
Acked-by: Mathieu Desnoyers
Signed-off-by: Will Deacon
Signed-off-by: Russell King
15 Jun, 2018
1 commit
-
HAVE_CC_STACKPROTECTOR should be selected by architectures with stack
canary implementation. It is not about the compiler support.For the consistency with commit 050e9baa9dc9 ("Kbuild: rename
CC_STACKPROTECTOR[_STRONG] config variables"), remove 'CC_' from the
config symbol.I moved the 'select' lines to keep the alphabetical sorting.
Signed-off-by: Masahiro Yamada
Acked-by: Kees Cook
Signed-off-by: Linus Torvalds
08 Jun, 2018
1 commit
-
Currently the PTE special supports is turned on in per architecture
header files. Most of the time, it is defined in
arch/*/include/asm/pgtable.h depending or not on some other per
architecture static definition.This patch introduce a new configuration variable to manage this
directly in the Kconfig files. It would later replace
__HAVE_ARCH_PTE_SPECIAL.Here notes for some architecture where the definition of
__HAVE_ARCH_PTE_SPECIAL is not obvious:arm
__HAVE_ARCH_PTE_SPECIAL which is currently defined in
arch/arm/include/asm/pgtable-3level.h which is included by
arch/arm/include/asm/pgtable.h when CONFIG_ARM_LPAE is set.
So select ARCH_HAS_PTE_SPECIAL if ARM_LPAE.powerpc
__HAVE_ARCH_PTE_SPECIAL is defined in 2 files:
- arch/powerpc/include/asm/book3s/64/pgtable.h
- arch/powerpc/include/asm/pte-common.h
The first one is included if (PPC_BOOK3S & PPC64) while the second is
included in all the other cases.
So select ARCH_HAS_PTE_SPECIAL all the time.sparc:
__HAVE_ARCH_PTE_SPECIAL is defined if defined(__sparc__) &&
defined(__arch64__) which are defined through the compiler in
sparc/Makefile if !SPARC32 which I assume to be if SPARC64.
So select ARCH_HAS_PTE_SPECIAL if SPARC64There is no functional change introduced by this patch.
Link: http://lkml.kernel.org/r/1523433816-14460-2-git-send-email-ldufour@linux.vnet.ibm.com
Signed-off-by: Laurent Dufour
Suggested-by: Jerome Glisse
Reviewed-by: Jerome Glisse
Acked-by: David Rientjes
Cc: Michal Hocko
Cc: "Aneesh Kumar K . V"
Cc: Michael Ellerman
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Jonathan Corbet
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Yoshinori Sato
Cc: Rich Felker
Cc: David S. Miller
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Vineet Gupta
Cc: Palmer Dabbelt
Cc: Albert Ou
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: David Rientjes
Cc: Robin Murphy
Cc: Christophe LEROY
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Jun, 2018
1 commit
-
Pull documentation updates from Jonathan Corbet:
"There's been a fair amount of work in the docs tree this time around,
including:- Extensive RST conversions and organizational work in the
memory-management docs thanks to Mike Rapoport.- An update of Documentation/features from Andrea Parri and a script
to keep it updated.- Various LICENSES updates from Thomas, along with a script to check
SPDX tags.- Work to fix dangling references to documentation files; this
involved a fair number of one-liner comment changes outside of
Documentation/... and the usual list of documentation improvements, typo fixes, etc"
* tag 'docs-4.18' of git://git.lwn.net/linux: (103 commits)
Documentation: document hung_task_panic kernel parameter
docs/admin-guide/mm: add high level concepts overview
docs/vm: move ksm and transhuge from "user" to "internals" section.
docs: Use the kerneldoc comments for memalloc_no*()
doc: document scope NOFS, NOIO APIs
docs: update kernel versions and dates in tables
docs/vm: transhuge: split userspace bits to admin-guide/mm/transhuge
docs/vm: transhuge: minor updates
docs/vm: transhuge: change sections order
Documentation: arm: clean up Marvell Berlin family info
Documentation: gpio: driver: Fix a typo and some odd grammar
docs: ranoops.rst: fix location of ramoops.txt
scripts/documentation-file-ref-check: rewrite it in perl with auto-fix mode
docs: uio-howto.rst: use a code block to solve a warning
mm, THP, doc: Add document for thp_swpout/thp_swpout_fallback
w1: w1_io.c: fix a kernel-doc warning
Documentation/process/posting: wrap text at 80 cols
docs: admin-guide: add cgroup-v2 documentation
Revert "Documentation/features/vm: Remove arch support status file for 'pte_special'"
Documentation: refcount-vs-atomic: Update reference to LKMM doc.
...
11 May, 2018
1 commit
-
The removal of this file appears to have been premature; it's not a feature
enabled by Kconfig, but it's a arch-level feature regardless. Put it back
for now until some happy future time when we decide how we really want to
document such features.This reverts commit 2bef69a385b4c1c01d8abae0aa035f0ffa051f07.
Signed-off-by: Jonathan Corbet
08 May, 2018
7 commits
-
Suggested-by: Ingo Molnar
Signed-off-by: Andrea Parri
Cc: Ingo Molnar
Cc: Jonathan Corbet
Cc: Andrew Morton
Signed-off-by: Jonathan Corbet -
Suggested-by: Ingo Molnar
Signed-off-by: Andrea Parri
Cc: Ingo Molnar
Cc: Jonathan Corbet
Cc: Andrew Morton
Signed-off-by: Jonathan Corbet -
Uses '!RWSEM_GENERIC_SPINLOCK' in place of 'Optimized asm/rwsem.h' as
Kconfig for 'rwsem-optimized': the new Kconfig expresses this feature
equivalently, while also enabling the script 'features-refresh.sh' to
operate on the corresponding arch support status file. Also refreshes
the status matrix by using the script 'features-refresh.sh'.Suggested-by: Ingo Molnar
Signed-off-by: Andrea Parri
Cc: Ingo Molnar
Cc: Jonathan Corbet
Cc: Andrew Morton
Signed-off-by: Jonathan Corbet -
Commit 6077776b5908e split 'HAVE_BPF_JIT' into cBPF and eBPF variant.
Adds arch support status files for the new variants, and removes the
status file corresponding to 'HAVE_BPT_JIT'. The new status matrices
were auto-generated using the script 'features-refresh.sh'.Signed-off-by: Andrea Parri
Cc: Ingo Molnar
Cc: Jonathan Corbet
Cc: Andrew Morton
Signed-off-by: Jonathan Corbet -
Now that the script 'features-refresh.sh' is available, uses this script
to refresh all the arch-support.txt files in place.Signed-off-by: Andrea Parri
Cc: Ingo Molnar
Cc: Jonathan Corbet
Cc: Andrew Morton
Signed-off-by: Jonathan Corbet -
Provides the script:
Documentation/features/scripts/features-refresh.sh
which operates on the arch-support.txt files and refreshes them in place.
This way [1],
"[...] we soft- decouple the refreshing of the entries from the
introduction of the features, while still making it all easy to
keep sync and to extend."[1] http://lkml.kernel.org/r/20180328122211.GA25420@andrea
Suggested-by: Ingo Molnar
Signed-off-by: Andrea Parri
Cc: Ingo Molnar
Cc: Jonathan Corbet
Cc: Andrew Morton
Signed-off-by: Jonathan Corbet -
There is no arch specific code required for dma-debug, so there is no
need to opt into the support either.Signed-off-by: Christoph Hellwig
Reviewed-by: Robin Murphy
03 Apr, 2018
1 commit
-
Pul removal of obsolete architecture ports from Arnd Bergmann:
"This removes the entire architecture code for blackfin, cris, frv,
m32r, metag, mn10300, score, and tile, including the associated device
drivers.I have been working with the (former) maintainers for each one to
ensure that my interpretation was right and the code is definitely
unused in mainline kernels. Many had fond memories of working on the
respective ports to start with and getting them included in upstream,
but also saw no point in keeping the port alive without any users.In the end, it seems that while the eight architectures are extremely
different, they all suffered the same fate: There was one company in
charge of an SoC line, a CPU microarchitecture and a software
ecosystem, which was more costly than licensing newer off-the-shelf
CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
seems that all the SoC product lines are still around, but have not
used the custom CPU architectures for several years at this point. In
contrast, CPU instruction sets that remain popular and have actively
maintained kernel ports tend to all be used across multiple licensees.[ See the new nds32 port merged in the previous commit for the next
generation of "one company in charge of an SoC line, a CPU
microarchitecture and a software ecosystem" - Linus ]The removal came out of a discussion that is now documented at
https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
marking any ports as deprecated but remove them all at once after I
made sure that they are all unused. Some architectures (notably tile,
mn10300, and blackfin) are still being shipped in products with old
kernels, but those products will never be updated to newer kernel
releases.After this series, we still have a few architectures without mainline
gcc support:- unicore32 and hexagon both have very outdated gcc releases, but the
maintainers promised to work on providing something newer. At least
in case of hexagon, this will only be llvm, not gcc.- openrisc, risc-v and nds32 are still in the process of finishing
their support or getting it added to mainline gcc in the first
place. They all have patched gcc-7.3 ports that work to some
degree, but complete upstream support won't happen before gcc-8.1.
Csky posted their first kernel patch set last week, their situation
will be similar[ Palmer Dabbelt points out that RISC-V support is in mainline gcc
since gcc-7, although gcc-7.3.0 is the recommended minimum - Linus ]"This really says it all:
2498 files changed, 95 insertions(+), 467668 deletions(-)
* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
MAINTAINERS: UNICORE32: Change email account
staging: iio: remove iio-trig-bfin-timer driver
tty: hvc: remove tile driver
tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
serial: remove tile uart driver
serial: remove m32r_sio driver
serial: remove blackfin drivers
serial: remove cris/etrax uart drivers
usb: Remove Blackfin references in USB support
usb: isp1362: remove blackfin arch glue
usb: musb: remove blackfin port
usb: host: remove tilegx platform glue
pwm: remove pwm-bfin driver
i2c: remove bfin-twi driver
spi: remove blackfin related host drivers
watchdog: remove bfin_wdt driver
can: remove bfin_can driver
mmc: remove bfin_sdh driver
input: misc: remove blackfin rotary driver
input: keyboard: remove bf54x driver
...
26 Mar, 2018
1 commit
-
A number of architecture ports are obsolete and getting dropped,
so we no longer want to track the respective features.We already removed the lines for metag and mn10300, this does
the same edits for all the others.For the remaining 21 architectures, this shows how many are known
to implement each given feature:19 time/modern-timekeeping/arch-support.txt
19 time/clockevents/arch-support.txt
15 core/tracehook/arch-support.txt
14 core/generic-idle-thread/arch-support.txt
13 locking/lockdep/arch-support.txt
12 io/dma-api-debug/arch-support.txt
11 debug/kgdb/arch-support.txt
10 time/virt-cpuacct/arch-support.txt
9 debug/kretprobes/arch-support.txt
9 debug/kprobes/arch-support.txt
8 vm/THP/arch-support.txt
8 vm/pte_special/arch-support.txt
8 vm/numa-memblock/arch-support.txt
8 io/sg-chain/arch-support.txt
7 perf/kprobes-event/arch-support.txt
7 locking/rwsem-optimized/arch-support.txt
7 debug/gcov-profile-all/arch-support.txt
7 core/jump-labels/arch-support.txt
7 core/BPF-JIT/arch-support.txt
6 vm/ELF-ASLR/arch-support.txt
6 time/context-tracking/arch-support.txt
6 seccomp/seccomp-filter/arch-support.txt
6 debug/stackprotector/arch-support.txt
5 time/irq-time-acct/arch-support.txt
5 io/dma-contiguous/arch-support.txt
5 debug/uprobes/arch-support.txt
4 vm/ioremap_prot/arch-support.txt
4 time/arch-tick-broadcast/arch-support.txt
4 perf/perf-stackdump/arch-support.txt
4 perf/perf-regs/arch-support.txt
3 debug/KASAN/arch-support.txt
2 vm/PG_uncached/arch-support.txt
2 vm/huge-vmap/arch-support.txt
2 sched/numa-balancing/arch-support.txt
2 sched/membarrier-sync-core/arch-support.txt
2 locking/cmpxchg-local/arch-support.txt
2 debug/optprobes/arch-support.txt
2 debug/kprobes-on-ftrace/arch-support.txt
1 vm/TLB/arch-support.txt
1 locking/queued-spinlocks/arch-support.txt
1 locking/queued-rwlocks/arch-support.txt
1 debug/user-ret-profiler/arch-support.txt
0 lib/strncasecmp/arch-support.txtNote that the list does not include riscv or nds32 yet, these still
need to be added.Signed-off-by: Arnd Bergmann
10 Mar, 2018
1 commit
-
Remove the MN10300 arch as the hardware is defunct.
Suggested-by: Arnd Bergmann
Signed-off-by: David Howells
cc: Masahiro Yamada
cc: linux-am33-list@redhat.com
Signed-off-by: Arnd Bergmann
22 Feb, 2018
1 commit
-
Remove any remaining references to the Meta architecture in
Documentation/, primarily from Documentation/features/.Signed-off-by: James Hogan
Cc: Jonathan Corbet
Cc: linux-metag@vger.kernel.org
Cc: linux-doc@vger.kernel.org
11 Feb, 2018
2 commits
-
Ensure we gather architecture requirements about each architecture
supporting the "sync_core" membarrier command in a single file under
Documentation/features.Signed-off-by: Mathieu Desnoyers
Cc: Andrea Parri
Cc: Andrew Hunter
Cc: Andy Lutomirski
Cc: Avi Kivity
Cc: Benjamin Herrenschmidt
Cc: Boqun Feng
Cc: Dave Watson
Cc: David Sehr
Cc: Greg Hackmann
Cc: Jonathan Corbet
Cc: Linus Torvalds
Cc: Maged Michael
Cc: Michael Ellerman
Cc: Paul E. McKenney
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Russell King
Cc: Thomas Gleixner
Cc: Will Deacon
Cc: linux-api@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1518208256-22034-1-git-send-email-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar -
The list-arch.sh script considers lines beginning with "#" as match for
the feature table.Given that those tables are never in lines beginning with "#",
add a reverse grep on "^#" when matching the "ok/TODO" state of
the architecture.This allows adding comments within the feature files, for instance
describing the architecture requirements for the feature in each
architecture.Signed-off-by: Mathieu Desnoyers
Cc: Jonathan Corbet
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1518282058-24226-1-git-send-email-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar
10 Feb, 2018
1 commit
-
Ensure we gather architecture requirements about each architecture
supporting the "sync_core" membarrier command in a single file under
Documentation/features.Signed-off-by: Mathieu Desnoyers
Cc: Andrea Parri
Cc: Andrew Hunter
Cc: Andy Lutomirski
Cc: Avi Kivity
Cc: Benjamin Herrenschmidt
Cc: Boqun Feng
Cc: Dave Watson
Cc: David Sehr
Cc: Greg Hackmann
Cc: Linus Torvalds
Cc: Maged Michael
Cc: Michael Ellerman
Cc: Paul E. McKenney
Cc: Paul Mackerras
Cc: Peter Zijlstra (Intel)
Cc: Peter Zijlstra
Cc: Russell King
Cc: Thomas Gleixner
Cc: Will Deacon
Cc: linux-api@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/1518208256-22034-1-git-send-email-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar
30 Jan, 2018
1 commit
-
Pull Xtensa updates from Max Filippov:
- add SSP support
- add KASAN support
- improvements to xtensa-specific assembly:
- use ENTRY and ENDPROC consistently
- clean up and unify word alignment macros
- clean up and unify fixup marking
- use 'call' instead of 'callx' where possible- various cleanups:
- consiolidate kernel stack size related definitions
- replace #ifdef'fed/commented out debug printk statements with
pr_debug
- use struct exc_table instead of flat array for exception handling
data- build kernel with -mtext-section-literals; simplify xtensa linker
script- fix futex_atomic_cmpxchg_inatomic()
* tag 'xtensa-20180129' of git://github.com/jcmvbkbc/linux-xtensa: (21 commits)
xtensa: fix futex_atomic_cmpxchg_inatomic
xtensa: shut up gcc-8 warnings
xtensa: print kernel sections info in mem_init
xtensa: use generic strncpy_from_user with KASAN
xtensa: use __memset in __xtensa_clear_user
xtensa: add support for KASAN
xtensa: move fixmap and kmap just above the KSEG
xtensa: don't clear swapper_pg_dir in paging_init
xtensa: extract init_kio
xtensa: implement early_trap_init
xtensa: clean up exception handling structure
xtensa: clean up custom-controlled debug output
xtensa: enable stack protector
xtensa: print hardware config ID on startup
xtensa: consolidate kernel stack size related definitions
xtensa: clean up functions in assembly code
xtensa: clean up word alignment macros in assembly code
xtensa: clean up fixups in assembly code
xtensa: use call instead of callx in assembly code
xtensa: build kernel with text-section-literals
...
17 Dec, 2017
2 commits
-
Cover kernel addresses above 0x90000000 by the shadow map. Enable
HAVE_ARCH_KASAN when MMU is enabled. Provide kasan_early_init that fills
shadow map with writable copies of kasan_zero_page. Call
kasan_early_init right after mmu initialization in the setup_arch.
Provide kasan_init that allocates proper shadow map pages from the
memblock and puts these pages into the shadow map for addresses from
VMALLOC area to the end of KSEG. Call kasan_init right after memblock
initialization. Don't use KASAN for the boot code, MMU and KASAN
initialization and page fault handler. Make kernel stack size 4 times
larger when KASAN is enabled to avoid stack overflows.
GCC 7.3, 8 or newer is required to build the xtensa kernel with KASAN.Signed-off-by: Max Filippov
-
The implementation is adopted from the ARM arch. GCC 7.3, 8 or newer is
required for building the xtensa kernel with SSP.Signed-off-by: Max Filippov
04 Oct, 2017
1 commit
-
Relevant part is:
arch/x86/Kconfig: select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAPSigned-off-by: Adam Borowski
Signed-off-by: Jonathan Corbet
08 Aug, 2017
1 commit
-
Since commit 64e2a42bca12 ("parisc: Add ARCH_TRACEHOOK and regset
support") in v4.7, parisc selects HAVE_ARCH_TRACEHOOK, so update its
entry in Documentation/features from TODO to ok.Signed-off-by: James Hogan
Cc: "James E.J. Bottomley"
Cc: Helge Deller
Cc: Ingo Molnar
Signed-off-by: Jonathan Corbet
06 May, 2017
1 commit
-
Pull powerpc updates from Michael Ellerman:
"Highlights include:- Larger virtual address space on 64-bit server CPUs. By default we
use a 128TB virtual address space, but a process can request access
to the full 512TB by passing a hint to mmap().- Support for the new Power9 "XIVE" interrupt controller.
- TLB flushing optimisations for the radix MMU on Power9.
- Support for CAPI cards on Power9, using the "Coherent Accelerator
Interface Architecture 2.0".- The ability to configure the mmap randomisation limits at build and
runtime.- Several small fixes and cleanups to the kprobes code, as well as
support for KPROBES_ON_FTRACE.- Major improvements to handling of system reset interrupts,
correctly treating them as NMIs, giving them a dedicated stack and
using a new hypervisor call to trigger them, all of which should
aid debugging and robustness.- Many fixes and other minor enhancements.
Thanks to: Alastair D'Silva, Alexey Kardashevskiy, Alistair Popple,
Andrew Donnellan, Aneesh Kumar K.V, Anshuman Khandual, Anton
Blanchard, Balbir Singh, Ben Hutchings, Benjamin Herrenschmidt,
Bhupesh Sharma, Chris Packham, Christian Zigotzky, Christophe Leroy,
Christophe Lombard, Daniel Axtens, David Gibson, Gautham R. Shenoy,
Gavin Shan, Geert Uytterhoeven, Guilherme G. Piccoli, Hamish Martin,
Hari Bathini, Kees Cook, Laurent Dufour, Madhavan Srinivasan, Mahesh J
Salgaonkar, Mahesh Salgaonkar, Masami Hiramatsu, Matt Brown, Matthew
R. Ochs, Michael Neuling, Naveen N. Rao, Nicholas Piggin, Oliver
O'Halloran, Pan Xinhui, Paul Mackerras, Rashmica Gupta, Russell
Currey, Sukadev Bhattiprolu, Thadeu Lima de Souza Cascardo, Tobin C.
Harding, Tyrel Datwyler, Uma Krishnan, Vaibhav Jain, Vipin K Parashar,
Yang Shi"* tag 'powerpc-4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (214 commits)
powerpc/64s: Power9 has no LPCR[VRMASD] field so don't set it
powerpc/powernv: Fix TCE kill on NVLink2
powerpc/mm/radix: Drop support for CPUs without lockless tlbie
powerpc/book3s/mce: Move add_taint() later in virtual mode
powerpc/sysfs: Move #ifdef CONFIG_HOTPLUG_CPU out of the function body
powerpc/smp: Document irq enable/disable after migrating IRQs
powerpc/mpc52xx: Don't select user-visible RTAS_PROC
powerpc/powernv: Document cxl dependency on special case in pnv_eeh_reset()
powerpc/eeh: Clean up and document event handling functions
powerpc/eeh: Avoid use after free in eeh_handle_special_event()
cxl: Mask slice error interrupts after first occurrence
cxl: Route eeh events to all drivers in cxl_pci_error_detected()
cxl: Force context lock during EEH flow
powerpc/64: Allow CONFIG_RELOCATABLE if COMPILE_TEST
powerpc/xmon: Teach xmon oops about radix vectors
powerpc/mm/hash: Fix off-by-one in comment about kernel contexts ids
powerpc/pseries: Enable VFIO
powerpc/powernv: Fix iommu table size calculation hook for small tables
powerpc/powernv: Check kzalloc() return value in pnv_pci_table_alloc
powerpc: Add arch/powerpc/tools directory
...
01 May, 2017
1 commit
-
The AVR32 architecture support has been removed from the Linux kernel,
hence remove all references to it from Documentation.Signed-off-by: Hans-Christian Noren Egtvedt
Signed-off-by: Håvard Skinnemoen
Signed-off-by: Nicolas Ferre
Acked-by: Andy Shevchenko
Acked-by: Boris Brezillon
24 Apr, 2017
1 commit
-
Allow kprobes to be placed on ftrace _mcount() call sites. This optimization
avoids the use of a trap, by riding on ftrace infrastructure.This depends on HAVE_DYNAMIC_FTRACE_WITH_REGS which depends on MPROFILE_KERNEL,
which is only currently enabled on powerpc64le with newer toolchains.Based on the x86 code by Masami.
Signed-off-by: Naveen N. Rao
Signed-off-by: Michael Ellerman
24 Dec, 2016
1 commit
-
Pull more ARC updates from Vineet Gupta:
- Fix for aliasing VIPT dcache in old ARC700 cores
- micro-optimization in ARC700 ProtV handler
- Enable SG_CHAIN [Vladimir]
- ARC HS38 core intc default to prio 1
* tag 'arc-4.10-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: mm: arc700: Don't assume 2 colours for aliasing VIPT dcache
ARC: mm: No need to save cache version in @cpuinfo
ARC: enable SG chaining
ARCv2: intc: default all interrupts to priority 1
ARCv2: entry: document intr disable in hard isr
ARC: ARCompact entry: elide re-reading ECR in ProtV handler
19 Dec, 2016
1 commit
-
Signed-off-by: Vladimir Kondratiev
Signed-off-by: Vineet Gupta
16 Dec, 2016
1 commit
-
xtensa supports DMA API debug and contiguous DMA, mark it as such.
Signed-off-by: Max Filippov
13 Oct, 2016
1 commit
-
This should have been part of 40e084a506eb ('MIPS: Add uprobes support.').
Signed-off-by: Ralf Baechle
Fixes: 40e084a506eb ("MIPS: Add uprobes support.")
Acked-by: Jonathan Corbet
Cc: linux-mips@linux-mips.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14392/
Signed-off-by: Ralf Baechle
11 May, 2016
1 commit
-
With perf regs support enabled for powerpc, in commit ed4a4ef85cf5
("powerpc/perf: Add support for sampling interrupt register state"),
the support for obtaining perf user stack dump is already enabled. This
patch declares the support for same and also updates documentation to
mark the support for perf-regs and perf-stackdump.Signed-off-by: Chandan Kumar
Signed-off-by: Michael Ellerman
18 Mar, 2016
1 commit
-
Pull arm64 updates from Catalin Marinas:
"Here are the main arm64 updates for 4.6. There are some relatively
intrusive changes to support KASLR, the reworking of the kernel
virtual memory layout and initial page table creation.Summary:
- Initial page table creation reworked to avoid breaking large block
mappings (huge pages) into smaller ones. The ARM architecture
requires break-before-make in such cases to avoid TLB conflicts but
that's not always possible on live page tables- Kernel virtual memory layout: the kernel image is no longer linked
to the bottom of the linear mapping (PAGE_OFFSET) but at the bottom
of the vmalloc space, allowing the kernel to be loaded (nearly)
anywhere in physical RAM- Kernel ASLR: position independent kernel Image and modules being
randomly mapped in the vmalloc space with the randomness is
provided by UEFI (efi_get_random_bytes() patches merged via the
arm64 tree, acked by Matt Fleming)- Implement relative exception tables for arm64, required by KASLR
(initial code for ARCH_HAS_RELATIVE_EXTABLE added to lib/extable.c
but actual x86 conversion to deferred to 4.7 because of the merge
dependencies)- Support for the User Access Override feature of ARMv8.2: this
allows uaccess functions (get_user etc.) to be implemented using
LDTR/STTR instructions. Such instructions, when run by the kernel,
perform unprivileged accesses adding an extra level of protection.
The set_fs() macro is used to "upgrade" such instruction to
privileged accesses via the UAO bit- Half-precision floating point support (part of ARMv8.2)
- Optimisations for CPUs with or without a hardware prefetcher (using
run-time code patching)- copy_page performance improvement to deal with 128 bytes at a time
- Sanity checks on the CPU capabilities (via CPUID) to prevent
incompatible secondary CPUs from being brought up (e.g. weird
big.LITTLE configurations)- valid_user_regs() reworked for better sanity check of the
sigcontext information (restored pstate information)- ACPI parking protocol implementation
- CONFIG_DEBUG_RODATA enabled by default
- VDSO code marked as read-only
- DEBUG_PAGEALLOC support
- ARCH_HAS_UBSAN_SANITIZE_ALL enabled
- Erratum workaround Cavium ThunderX SoC
- set_pte_at() fix for PROT_NONE mappings
- Code clean-ups"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (99 commits)
arm64: kasan: Fix zero shadow mapping overriding kernel image shadow
arm64: kasan: Use actual memory node when populating the kernel image shadow
arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission
arm64: Fix misspellings in comments.
arm64: efi: add missing frame pointer assignment
arm64: make mrs_s prefixing implicit in read_cpuid
arm64: enable CONFIG_DEBUG_RODATA by default
arm64: Rework valid_user_regs
arm64: mm: check at build time that PAGE_OFFSET divides the VA space evenly
arm64: KVM: Move kvm_call_hyp back to its original localtion
arm64: mm: treat memstart_addr as a signed quantity
arm64: mm: list kernel sections in order
arm64: lse: deal with clobbered IP registers after branch via PLT
arm64: mm: dump: Use VA_START directly instead of private LOWEST_ADDR
arm64: kconfig: add submenu for 8.2 architectural features
arm64: kernel: acpi: fix ioremap in ACPI parking protocol cpu_postboot
arm64: Add support for Half precision floating point
arm64: Remove fixmap include fragility
arm64: Add workaround for Cavium erratum 27456
arm64: mm: Mark .rodata as RO
...
19 Feb, 2016
1 commit
-
This wires up the existing generic huge-vmap feature, which allows
ioremap() to use PMD or PUD sized block mappings. It also adds support
to the unmap path for dealing with block mappings, which will allow us
to unmap the __init region using unmap_kernel_range() in a subsequent
patch.Signed-off-by: Ard Biesheuvel
Signed-off-by: Catalin Marinas
27 Jan, 2016
1 commit
-
Commit 669f6f96c680a741257ada44a28b580df2e1fc25 introduced
the script list-arch.sh, which uses the command "arch":ARCH=${1:-$(arch | sed 's/x86_64/x86/' | sed 's/i386/x86/')}
It turns out that the "arch" command does not exist in my system (arch
distro). Google found man pages which say "arch is deprecated command since
release util-linux 2.13. Use uname -m" (util-linux 2.13 was released in 2007).
I also found a debian bug reporting the lack of arch and being told to use
uname -m https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=446023But then, why it works in some distros? Apparently coreutils gained an
optional arch command that needs to be explicitly enabled during compilation.
Some distros enable it, others don't. Sigh.Signed-off-by: Diego Calleja
Acked-by: Ingo Molnar
Signed-off-by: Jonathan Corbet
21 Jan, 2016
1 commit
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Move the generic implementation to now that all
architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
that everyone supports them.[valentinrothberg@gmail.com: remove leftovers in Kconfig]
Signed-off-by: Christoph Hellwig
Cc: "David S. Miller"
Cc: Aurelien Jacquiot
Cc: Chris Metcalf
Cc: David Howells
Cc: Geert Uytterhoeven
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Helge Deller
Cc: James Hogan
Cc: Jesper Nilsson
Cc: Koichi Yasutake
Cc: Ley Foon Tan
Cc: Mark Salter
Cc: Mikael Starvik
Cc: Steven Miao
Cc: Vineet Gupta
Cc: Christian Borntraeger
Cc: Joerg Roedel
Cc: Sebastian Ott
Signed-off-by: Valentin Rothberg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Jan, 2016
1 commit
-
With new refcounting we don't need to mark PMDs splitting. Let's drop
code to handle this.Signed-off-by: Kirill A. Shutemov
Tested-by: Sasha Levin
Tested-by: Aneesh Kumar K.V
Acked-by: Vlastimil Babka
Acked-by: Jerome Marchand
Cc: Andrea Arcangeli
Cc: Hugh Dickins
Cc: Dave Hansen
Cc: Mel Gorman
Cc: Rik van Riel
Cc: Naoya Horiguchi
Cc: Steve Capper
Cc: Johannes Weiner
Cc: Michal Hocko
Cc: Christoph Lameter
Cc: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Jan, 2016
1 commit
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Pull UML updates from Richard Weinberger:
"This contains beside of random fixes/cleanups two bigger changes:- seccomp support by Mickaël Salaün
- IRQ rework by Anton Ivanov"
* 'for-linus-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: Use race-free temporary file creation
um: Do not set unsecure permission for temporary file
um: Fix build error and kconfig for i386
um: Add seccomp support
um: Add full asm/syscall.h support
selftests/seccomp: Remove the need for HAVE_ARCH_TRACEHOOK
um: Fix ptrace GETREGS/SETREGS bugs
um: link with -lpthread
um: Update UBD to use pread/pwrite family of functions
um: Do not change hard IRQ flags in soft IRQ processing
um: Prevent IRQ handler reentrancy
uml: flush stdout before forking
uml: fix hostfs mknod()
11 Jan, 2016
1 commit
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This brings SECCOMP_MODE_STRICT and SECCOMP_MODE_FILTER support through
prctl(2) and seccomp(2) to User-mode Linux for i386 and x86_64
subarchitectures.secure_computing() is called first in handle_syscall() so that the
syscall emulation will be aborted quickly if matching a seccomp rule.This is inspired from Meredydd Luff's patch
(https://gerrit.chromium.org/gerrit/21425).Signed-off-by: Mickaël Salaün
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Ingo Molnar
Cc: Kees Cook
Cc: Andy Lutomirski
Cc: Will Drewry
Cc: Chris Metcalf
Cc: Michael Ellerman
Cc: James Hogan
Cc: Meredydd Luff
Cc: David Drysdale
Signed-off-by: Richard Weinberger
Acked-by: Kees Cook
04 Dec, 2015
1 commit
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arm64 relies on the arm_arch_timer for sched_clock, so we can select
HAVE_IRQ_TIME_ACCOUNTING and have the core sched-clock code enable the
feature at runtime based on the rate.Reported-by: Mario Smarduch
Signed-off-by: Will Deacon