05 Feb, 2020
1 commit
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Allow vectors to be either merged into the kernel .text or put at a
fixed virtual address independently of XIP option. Drop option that
puts vectors at a fixed offset from the kernel text. Add choice to
Kconfig.
Vectors at fixed virtual address may be useful for XIP-aware MTD support
and for noMMU configurations with available IRAM. Configurations without
VECBASE register must put their vectors at specific locations regardless
of the selected option. All other configurations should happily use
merged vectors.Signed-off-by: Max Filippov
31 Jan, 2020
1 commit
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CONFIG_IOSCHED_DEADLINE and CONFIG_IOSCHED_CFQ are gone since
commit f382fb0bcef4 ("block: remove legacy IO schedulers").The IOSCHED_DEADLINE was replaced by MQ_IOSCHED_DEADLINE and it will be
now enabled by default (along with MQ_IOSCHED_KYBER).Signed-off-by: Krzysztof Kozlowski
Message-Id:
Signed-off-by: Max Filippov
04 Dec, 2019
1 commit
-
Pull Xtensa updates from Max Filippov:
- add support for execute in place (XIP) kernels
- improvements in inline assembly: use named arguments and "m"
constraints where possible- improve stack dumping
- clean up system_call code and syscall tracing
- various small fixes and cleanups
* tag 'xtensa-20191201' of git://github.com/jcmvbkbc/linux-xtensa: (30 commits)
xtensa: clean up system_call/xtensa_rt_sigreturn interaction
xtensa: fix system_call interaction with ptrace
xtensa: rearrange syscall tracing
xtensa: fix syscall_set_return_value
xtensa: drop unneeded headers from coprocessor.S
xtensa: entry: Remove unneeded need_resched() loop
xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow map
xtensa: fix TLB sanity checker
xtensa: get rid of __ARCH_USE_5LEVEL_HACK
xtensa: mm: fix PMD folding implementation
xtensa: make stack dump size configurable
xtensa: improve stack dumping
xtensa: use "m" constraint instead of "r" in futex.h assembly
xtensa: use "m" constraint instead of "a" in cmpxchg.h assembly
xtensa: use named assembly arguments in cmpxchg.h
xtensa: use "m" constraint instead of "a" in atomic.h assembly
xtensa: use named assembly arguments in atomic.h
xtensa: use "m" constraint instead of "a" in bitops.h assembly
xtensa: use named assembly arguments in bitops.h
xtensa: use macros to generate *_bit and test_and_*_bit functions
...
27 Nov, 2019
2 commits
-
XIP (eXecute In Place) kernel image is the image that can be run
directly from ROM, using RAM only for writable data.XIP xtensa kernel differs from regular xtensa kernel in the following
ways:
- it has exception/IRQ vectors merged into text section. No vectors
relocation takes place at kernel startup.
- .data/.bss location must be specified in the kernel configuration,
its content is copied there in the _startup function.
- .init.text is merged with the rest of text and is executed from ROM.
- when MMU is used the virtual address where the kernel will be mapped
must be specified in the kernel configuration. It may be in the KSEG
or in the KIO, __pa macro is adjusted to be able to handle both.Signed-off-by: Max Filippov
-
This system call has been deprecated almost since it was introduced, and
in a survey of the linux distributions I can no longer find any of them
that enable CONFIG_SYSCTL_SYSCALL. The only indication that I can find
that anyone might care is that a few of the defconfigs in the kernel
enable CONFIG_SYSCTL_SYSCALL. However this appears in only 31 of 414
defconfigs in the kernel, so I suspect this symbols presence is simply
because it is harmless to include rather than because it is necessary.As there appear to be no users of the sysctl system call, remove the
code. As this removes one of the few uses of the internal kernel mount
of proc I hope this allows for even more simplifications of the proc
filesystem.Cc: Alex Smith
Cc: Anders Berg
Cc: Apelete Seketeli
Cc: Arnd Bergmann
Cc: Chee Nouk Phoon
Cc: Chris Zankel
Cc: Christian Ruppert
Cc: Greg Ungerer
Cc: Harvey Hunt
Cc: Helge Deller
Cc: Hongliang Tao
Cc: Hua Yan
Cc: Huacai Chen
Cc: John Crispin
Cc: Jonas Jensen
Cc: Josh Boyer
Cc: Jun Nie
Cc: Kevin Hilman
Cc: Kevin Wells
Cc: Kumar Gala
Cc: Lars-Peter Clausen
Cc: Ley Foon Tan
Cc: Linus Walleij
Cc: Markos Chandras
Cc: Max Filippov
Cc: Noam Camus
Cc: Olof Johansson
Cc: Paul Burton
Cc: Paul Mundt
Cc: Phil Edworthy
Cc: Pierrick Hascoet
Cc: Ralf Baechle
Cc: Roland Stigge
Cc: Santosh Shilimkar
Cc: Scott Telford
Cc: Stephen Boyd
Cc: Steven J. Hill
Cc: Tanmay Inamdar
Cc: Vineet Gupta
Cc: Wolfram Sang
Acked-by: Andi Kleen
Reviewed-by: Kees Cook
Signed-off-by: "Eric W. Biederman"
09 Jul, 2019
1 commit
-
Add defconfig and DTS for a virt board. Defconfig enables PCIe host and
a number of virtio devices. DTS routes legacy PCI IRQs to the first four
level-triggered external IRQ lines. CPU core with edge-triggered IRQs
among the first four may need a custom DTS to work correctly.Signed-off-by: Max Filippov
26 Jan, 2019
2 commits
-
When building some xtensa config, I hit the following warning:
drivers/staging/mt7621-dts/Kconfig:4:warning: 'BUILTIN_DTB' has wrong type.
'select' only accept arguments of bool and tristate typeIt is due to some arch use BUILTIN_DTB as a flag for the need to builtin
dtb but xtensa use it as a string for which dtb to bulltin.
But for this (which dtb to build), it is better to use
BUILTIN_DTB_SOURCE like other arch do.Signed-off-by: Corentin Labbe
Signed-off-by: Max Filippov -
Secondary CPU reset vector overlaps part of the double exception handler
code, resulting in weird crashes and hangups when running user code.
Move exception vectors one page up so that they don't clash with the
secondary CPU reset vector.Signed-off-by: Max Filippov
23 Nov, 2018
1 commit
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There is no good reason to duplicate the PCI menu in every architecture.
Instead provide a selectable HAVE_PCI symbol that indicates availability
of PCI support, and a FORCE_PCI symbol to for PCI on and the handle the
rest in drivers/pci.Signed-off-by: Christoph Hellwig
Reviewed-by: Palmer Dabbelt
Acked-by: Max Filippov
Acked-by: Thomas Gleixner
Acked-by: Bjorn Helgaas
Acked-by: Geert Uytterhoeven
Acked-by: Paul Burton
Signed-off-by: Masahiro Yamada
21 Aug, 2018
1 commit
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Now that noMMU cache attributes are set up separately drop no longer
used macro PLATFORM_DEFAULT_MEM_SIZE and config symbol
CONFIG_DEFAULT_MEM_SIZE used for setting it.Signed-off-by: Max Filippov
14 Aug, 2018
1 commit
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Marking default memory region as cached is not always sufficient and is
not flexible. Allow specifying cache attributes for the whole memory
address space with new config entry MEMMAP_CACHEATTR. Apply it after
cache initialization.Signed-off-by: Max Filippov
24 Jan, 2018
1 commit
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CONFIG_IRQ_DOMAIN_DEBUG is similar to CONFIG_GENERIC_IRQ_DEBUGFS,
just with less information.Spring cleanup time.
Signed-off-by: Marc Zyngier
Signed-off-by: Thomas Gleixner
Cc: Yang Shunyong
Link: https://lkml.kernel.org/r/20180117142647.23622-1-marc.zyngier@arm.com
21 Sep, 2016
3 commits
-
Now that memory initialization doesn't add default memory region
specify it explicitly in the memmap command line option in case somebody
wants to boot in non-DT-enabled configuration.While at it update earlycon access mode to mmio32native to support both
LE and BE cores transparently.Signed-off-by: Max Filippov
-
Now that memory initialization doesn't add default memory region specify
it explicitly in the memmap command line option.Save common_defconfig as defconfig so that it doesn't have all option
settings in it, only those that are different from the Kconfig defaults.Signed-off-by: Max Filippov
-
Now that memory initialization doesn't add default memory region specify
it explicitly in the memmap command line option.Save iss_defconfig as defconfig so that it doesn't have all option
settings in it, only those that are different from the Kconfig defaults.Signed-off-by: Max Filippov
10 Sep, 2016
1 commit
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Added defconfig, device tree and Xtensa variant header files for the
Cadence Configurable System Platform "xt_lnx" processor configuration.Signed-off-by: Scott Telford
Signed-off-by: Max Filippov
24 May, 2016
1 commit
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This option was replaced by PAGE_COUNTER which is selected by MEMCG.
Signed-off-by: Konstantin Khlebnikov
Acked-by: Arnd Bergmann
Acked-by: Balbir Singh
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Nov, 2015
1 commit
-
Pull xtensa updates from Chris Zankel:
- fix remaining issues with noMMU cores
- fix build for cores w/o cache or zero overhead loop options
- fix boot of secondary cores in SMP configuration
- add support for DMA to high memory pages
- add dma_to_phys and phys_to_dma functions.* tag 'xtensa-20151108' of git://github.com/czankel/xtensa-linux:
xtensa: implement dma_to_phys and phys_to_dma
xtensa: support DMA to high memory
Revert "xtensa: cache inquiry and unaligned cache handling functions"
xtensa: drop unused sections and remapped reset handlers
xtensa: fix secondary core boot in SMP
xtensa: add FORCE_MAX_ZONEORDER to Kconfig
xtensa: nommu: provide defconfig for de212 on kc705
xtensa: nommu: xtfpga: add kc705 DTS
xtensa: add de212 core variant
xtensa: nommu: select HAVE_FUTEX_CMPXCHG
xtensa: nommu: fix default memory start address
xtensa: nommu: provide correct KIO addresses
xtensa: nommu: fix USER_RING definition
xtensa: xtfpga: fix integer overflow in TASK_SIZE
xtensa: fix build for configs without cache options
xtensa: fixes for configs without loop option
07 Nov, 2015
1 commit
-
Hugh has pointed that compound_head() call can be unsafe in some
context. There's one example:CPU0 CPU1
isolate_migratepages_block()
page_count()
compound_head()
!!PageTail() == true
put_page()
tail->first_page = NULL
head = tail->first_page
alloc_pages(__GFP_COMP)
prep_compound_page()
tail->first_page = head
__SetPageTail(p);
!!PageTail() == true
The race is pure theoretical. I don't it's possible to trigger it in
practice. But who knows.We can fix the race by changing how encode PageTail() and compound_head()
within struct page to be able to update them in one shot.The patch introduces page->compound_head into third double word block in
front of compound_dtor and compound_order. Bit 0 encodes PageTail() and
the rest bits are pointer to head page if bit zero is set.The patch moves page->pmd_huge_pte out of word, just in case if an
architecture defines pgtable_t into something what can have the bit 0
set.hugetlb_cgroup uses page->lru.next in the second tail page to store
pointer struct hugetlb_cgroup. The patch switch it to use page->private
in the second tail page instead. The space is free since ->first_page is
removed from the union.The patch also opens possibility to remove HUGETLB_CGROUP_MIN_ORDER
limitation, since there's now space in first tail page to store struct
hugetlb_cgroup pointer. But that's out of scope of the patch.That means page->compound_head shares storage space with:
- page->lru.next;
- page->next;
- page->rcu_head.next;That's too long list to be absolutely sure, but looks like nobody uses
bit 0 of the word.page->rcu_head.next guaranteed[1] to have bit 0 clean as long as we use
call_rcu(), call_rcu_bh(), call_rcu_sched(), or call_srcu(). But future
call_rcu_lazy() is not allowed as it makes use of the bit and we can
get false positive PageTail().[1] http://lkml.kernel.org/g/20150827163634.GD4029@linux.vnet.ibm.com
Signed-off-by: Kirill A. Shutemov
Acked-by: Michal Hocko
Reviewed-by: Andrea Arcangeli
Cc: Hugh Dickins
Cc: David Rientjes
Cc: Vlastimil Babka
Acked-by: Paul E. McKenney
Cc: Aneesh Kumar K.V
Cc: Andi Kleen
Cc: Christoph Lameter
Cc: Joonsoo Kim
Cc: Sergey Senozhatsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Nov, 2015
1 commit
-
Signed-off-by: Max Filippov
20 Jul, 2015
1 commit
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No one uses this anymore, and this is not the first time the
idea of replacing it with a (now possible) userspace side.
Lock stealing logic was removed long ago in when the lock
was granted to the highest prio.Signed-off-by: Davidlohr Bueso
Cc: Darren Hart
Cc: Steven Rostedt
Cc: Mike Galbraith
Cc: Paul E. McKenney
Cc: Sebastian Andrzej Siewior
Cc: Davidlohr Bueso
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1435782588-4177-2-git-send-email-dave@stgolabs.net
Signed-off-by: Thomas Gleixner
07 Feb, 2015
1 commit
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This is the generic KC705 defconfig with all pieces of xtfpga audio
subsystem enabled: I2C, SPI and ASoC support, I2C master, SPI master,
clock synthesizer, I2S master, audio codec and audio card drivers.Signed-off-by: Max Filippov
16 Dec, 2014
1 commit
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The default linker behavior is to optimize identical literal values
and remove unnecessary overhead. However, because of a bug in the
linker, this currently results in an error ('call target out of range').Disable link-time optimizations per default until there is a fix
for the linker and add the option to iss_defconfig.Signed-off-by: Chris Zankel
21 Oct, 2014
3 commits
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The Stretch s6000 family support has been merged into mainline 5 years
ago. There appear to be no users of this code since nobody complained
that there is a merge error preventing compilation.Apart from the s6105 IP camera reference design there are no s6000 devices
known to ever have run Linux and as the chips are out of production there
probably never will be. The successor s7000 no longer uses an Xtensa core
for the OS.Let's remove the code until someone is found who actually needs it.
Signed-off-by: Daniel Glöckner
Signed-off-by: Max Filippov -
This config allows running SMP-enabled bitstream on LX200 board.
NFS or FLASH rootfs, minimal debug, up to 4 cores.Signed-off-by: Max Filippov
-
This config enables most important features, NFS or FLASH rootfs and
minimal debug.Signed-off-by: Max Filippov
14 Aug, 2014
2 commits
-
Signed-off-by: Max Filippov
-
HAVE_IDE is not a property of architecture but of a platform, and neither
ISS or XTFPGA support it.Signed-off-by: Max Filippov
13 Apr, 2014
1 commit
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Pull vfs updates from Al Viro:
"The first vfs pile, with deep apologies for being very late in this
window.Assorted cleanups and fixes, plus a large preparatory part of iov_iter
work. There's a lot more of that, but it'll probably go into the next
merge window - it *does* shape up nicely, removes a lot of
boilerplate, gets rid of locking inconsistencie between aio_write and
splice_write and I hope to get Kent's direct-io rewrite merged into
the same queue, but some of the stuff after this point is having
(mostly trivial) conflicts with the things already merged into
mainline and with some I want more testing.This one passes LTP and xfstests without regressions, in addition to
usual beating. BTW, readahead02 in ltp syscalls testsuite has started
giving failures since "mm/readahead.c: fix readahead failure for
memoryless NUMA nodes and limit readahead pages" - might be a false
positive, might be a real regression..."* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
missing bits of "splice: fix racy pipe->buffers uses"
cifs: fix the race in cifs_writev()
ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
kill generic_file_buffered_write()
ocfs2_file_aio_write(): switch to generic_perform_write()
ceph_aio_write(): switch to generic_perform_write()
xfs_file_buffered_aio_write(): switch to generic_perform_write()
export generic_perform_write(), start getting rid of generic_file_buffer_write()
generic_file_direct_write(): get rid of ppos argument
btrfs_file_aio_write(): get rid of ppos
kill the 5th argument of generic_file_buffered_write()
kill the 4th argument of __generic_file_aio_write()
lustre: don't open-code kernel_recvmsg()
ocfs2: don't open-code kernel_recvmsg()
drbd: don't open-code kernel_recvmsg()
constify blk_rq_map_user_iov() and friends
lustre: switch to kernel_sendmsg()
ocfs2: don't open-code kernel_sendmsg()
take iov_iter stuff to mm/iov_iter.c
process_vm_access: tidy up a bit
...
08 Apr, 2014
1 commit
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If the renamed symbol is defined lib/iomap.c implements ioport_map and
ioport_unmap and currently (nearly) all platforms define the port
accessor functions outb/inb and friend unconditionally. So
HAS_IOPORT_MAP is the better name for this.Consequently NO_IOPORT is renamed to NO_IOPORT_MAP.
The motivation for this change is to reintroduce a symbol HAS_IOPORT
that signals if outb/int et al are available. I will address that at
least one merge window later though to keep surprises to a minimum and
catch new introductions of (HAS|NO)_IOPORT.The changes in this commit were done using:
$ git grep -l -E '(NO|HAS)_IOPORT' | xargs perl -p -i -e 's/\b((?:CONFIG_)?(?:NO|HAS)_IOPORT)\b/$1_MAP/'
Signed-off-by: Uwe Kleine-König
Acked-by: Arnd Bergmann
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Apr, 2014
1 commit
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it only makes control flow in __fput() and friends more convoluted.
Signed-off-by: Al Viro
13 Sep, 2013
1 commit
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After the last architecture switched to generic hard irqs the config
options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code
for !CONFIG_GENERIC_HARDIRQS can be removed.Signed-off-by: Martin Schwidefsky
20 Mar, 2013
1 commit
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The Xtensa GPIO driver uses gpiolib and cannot compile with only
GENERIC_GPIO.Signed-off-by: Alexandre Courbot
Acked-by: Arnd Bergmann
Acked-by: Linus Walleij
04 Oct, 2012
1 commit
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Remove Kconfig entries, boot subdirectory, dependencies from other
boot-* Makefiles, and sections from ld scripts.Remove stale redboot code that used to pass initrd addresses in a3 and
a4 to _start.Signed-off-by: Max Filippov
Signed-off-by: Chris Zankel
16 May, 2012
1 commit
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This represents the mass deletion of the of the tokenring support.
It gets rid of:
- the net/tr.c which the drivers depended on
- the drivers/net component
- the Kbuild infrastructure around it
- any tokenring related CONFIG_ settings in any defconfigs
- the tokenring headers in the include/linux dir
- the firmware associated with the tokenring drivers.
- any associated token ring documentation.Signed-off-by: Paul Gortmaker
23 Mar, 2012
1 commit
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Get rid of INLINE_SPIN_UNLOCK entirely replacing it with
UNINLINE_SPIN_UNLOCK instead of the reverse meaning.Whoever wants to change the default spinlock inlining
behavior and uninline the spinlocks for some weird reason,
such as spinlock debugging, paravirt etc. can now all just
select UNINLINE_SPIN_UNLOCKOriginal discussion at: https://lkml.org/lkml/2012/3/21/357
Suggested-by: Linus Torvalds
Signed-off-by: Raghavendra K T
Cc: Linus Torvalds
Cc: Ralf Baechle
Cc: Chris Metcalf
Cc: Chris Zankel
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/20120322095502.30866.75756.sendpatchset@codeblue
[ tidied up the changelog a bit ]
Signed-off-by: Ingo Molnar
05 Oct, 2011
1 commit
-
Awhile back I removed all the CONFIG_GENERIC_TIME referecnes as
the last of the non-GENERIC_TIME arches were converted.However, due to the functionality being important and around for
awhile, there apparently were some out of tree hardware enablement
patches that used it and have since been merged.This patch removes the remaining instances of GENERIC_TIME.
Singed-off-by: John Stultz
11 Apr, 2011
1 commit
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The BKL doesn't exist anymore so remove CONFIG_LOCK_KERNEL.
This work was supported by a hardware donation from the CE Linux Forum.
Signed-off-by: Alessio Igor Bogani
Signed-off-by: Jiri Kosina
15 Feb, 2011
1 commit
21 Jan, 2011
1 commit
-
The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel. A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.Reviewed-by: Ingo Molnar
Acked-by: David Woodhouse
Signed-off-by: David Rientjes
Cc: Greg KH
Cc: "David S. Miller"
Cc: Jens Axboe
Cc: Arnd Bergmann
Cc: Robin Holt
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
