powerpc architecture (both 64-bit and 32-bit) supports stack protector
mechanism since some time now [see commit 06ec27aea9 ("powerpc/64:
add stack protector support")].
Update stackprotector arch support documentation to reflect the same.
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Bhupesh Sharma <bhsharma@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Update lists to reflect that we have now KGDB and kretprobes
support.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Now that kprobes and kretprobes are implemented, update the list in
Documentation to reflect that.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
HAVE_CC_STACKPROTECTOR should be selected by architectures with stack
canary implementation. It is not about the compiler support.
For the consistency with commit 050e9baa9d ("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 <yamada.masahiro@socionext.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 <andrea.parri@amarulasolutions.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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.txt
Note that the list does not include riscv or nds32 yet, these still
need to be added.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Remove any remaining references to the Meta architecture in
Documentation/, primarily from Documentation/features/.
Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-metag@vger.kernel.org
Cc: linux-doc@vger.kernel.org
- 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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=8IkM
-----END PGP SIGNATURE-----
Merge tag 'xtensa-20180129' of git://github.com/jcmvbkbc/linux-xtensa
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
...
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 <jcmvbkbc@gmail.com>
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 <jcmvbkbc@gmail.com>
Relevant part is:
arch/x86/Kconfig: select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=vSF3
-----END PGP SIGNATURE-----
Merge tag 'powerpc-4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
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
...
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 <egtvedt@samfundet.no>
Signed-off-by: Håvard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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 <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
