Pull x86 microcode loader updates from Ingo Molnar:
"There are two main changes in this tree:
- AMD microcode early loading fixes
- some microcode loader source files reorganization"
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, microcode: Move to a proper location
x86, microcode, AMD: Fix early ucode loading
x86, microcode: Share native MSR accessing variants
x86, ramdisk: Export relocated ramdisk VA
Pull x86 EFI changes from Ingo Molnar:
"This consists of two main parts:
- New static EFI runtime services virtual mapping layout which is
groundwork for kexec support on EFI (Borislav Petkov)
- EFI kexec support itself (Dave Young)"
* 'x86-efi-kexec-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
x86/efi: parse_efi_setup() build fix
x86: ksysfs.c build fix
x86/efi: Delete superfluous global variables
x86: Reserve setup_data ranges late after parsing memmap cmdline
x86: Export x86 boot_params to sysfs
x86: Add xloadflags bit for EFI runtime support on kexec
x86/efi: Pass necessary EFI data for kexec via setup_data
efi: Export EFI runtime memory mapping to sysfs
efi: Export more EFI table variables to sysfs
x86/efi: Cleanup efi_enter_virtual_mode() function
x86/efi: Fix off-by-one bug in EFI Boot Services reservation
x86/efi: Add a wrapper function efi_map_region_fixed()
x86/efi: Remove unused variables in __map_region()
x86/efi: Check krealloc return value
x86/efi: Runtime services virtual mapping
x86/mm/cpa: Map in an arbitrary pgd
x86/mm/pageattr: Add last levels of error path
x86/mm/pageattr: Add a PUD error unwinding path
x86/mm/pageattr: Add a PTE pagetable populating function
x86/mm/pageattr: Add a PMD pagetable populating function
...
Pull x86 TLB detection update from Ingo Molnar:
"A single change that extends our TLB cache size detection+reporting
code"
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, cpu: Detect more TLB configuration
Pull x86 cleanups from Ingo Molnar:
"Misc cleanups"
* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, cpu, amd: Fix a shadowed variable situation
um, x86: Fix vDSO build
x86: Delete non-required instances of include <linux/init.h>
x86, realmode: Pointer walk cleanups, pull out invariant use of __pa()
x86/traps: Clean up error exception handler definitions
Pull x86/build changes from Ingo Molnar:
"Misc smaller improvements"
* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, boot: Move intcall() to the .inittext section
x86, boot: Use .code16 instead of .code16gcc
x86, sparse: Do not force removal of __user when calling copy_to/from_user_nocheck()
Pull x86/asm changes from Ingo Molnar:
"Misc optimizations"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Slightly tweak the access_ok() C variant for better code
x86: Replace assembly access_ok() with a C variant
x86-64, copy_user: Use leal to produce 32-bit results
x86-64, copy_user: Remove zero byte check before copy user buffer.
Pull scheduler changes from Ingo Molnar:
- Add the initial implementation of SCHED_DEADLINE support: a real-time
scheduling policy where tasks that meet their deadlines and
periodically execute their instances in less than their runtime quota
see real-time scheduling and won't miss any of their deadlines.
Tasks that go over their quota get delayed (Available to privileged
users for now)
- Clean up and fix preempt_enable_no_resched() abuse all around the
tree
- Do sched_clock() performance optimizations on x86 and elsewhere
- Fix and improve auto-NUMA balancing
- Fix and clean up the idle loop
- Apply various cleanups and fixes
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits)
sched: Fix __sched_setscheduler() nice test
sched: Move SCHED_RESET_ON_FORK into attr::sched_flags
sched: Fix up attr::sched_priority warning
sched: Fix up scheduler syscall LTP fails
sched: Preserve the nice level over sched_setscheduler() and sched_setparam() calls
sched/core: Fix htmldocs warnings
sched/deadline: No need to check p if dl_se is valid
sched/deadline: Remove unused variables
sched/deadline: Fix sparse static warnings
m68k: Fix build warning in mac_via.h
sched, thermal: Clean up preempt_enable_no_resched() abuse
sched, net: Fixup busy_loop_us_clock()
sched, net: Clean up preempt_enable_no_resched() abuse
sched/preempt: Fix up missed PREEMPT_NEED_RESCHED folding
sched/preempt, locking: Rework local_bh_{dis,en}able()
sched/clock, x86: Avoid a runtime condition in native_sched_clock()
sched/clock: Fix up clear_sched_clock_stable()
sched/clock, x86: Use a static_key for sched_clock_stable
sched/clock: Remove local_irq_disable() from the clocks
sched/clock, x86: Rewrite cyc2ns() to avoid the need to disable IRQs
...
Pull perf updates from Ingo Molnar:
"Kernel side changes:
- Add Intel RAPL energy counter support (Stephane Eranian)
- Clean up uprobes (Oleg Nesterov)
- Optimize ring-buffer writes (Peter Zijlstra)
Tooling side changes, user visible:
- 'perf diff':
- Add column colouring improvements (Ramkumar Ramachandra)
- 'perf kvm':
- Add guest related improvements, including allowing to specify a
directory with guest specific /proc information (Dongsheng Yang)
- Add shell completion support (Ramkumar Ramachandra)
- Add '-v' option (Dongsheng Yang)
- Support --guestmount (Dongsheng Yang)
- 'perf probe':
- Support showing source code, asking for variables to be collected
at probe time and other 'perf probe' operations that use DWARF
information.
This supports only binaries with debugging information at this
time, detached debuginfo (aka debuginfo packages) support should
come in later patches (Masami Hiramatsu)
- 'perf record':
- Rename --no-delay option to --no-buffering, better reflecting its
purpose and freeing up '--delay' to take the place of
'--initial-delay', so that 'record' and 'stat' are consistent
(Arnaldo Carvalho de Melo)
- Default the -t/--thread option to no inheritance (Adrian Hunter)
- Make per-cpu mmaps the default (Adrian Hunter)
- 'perf report':
- Improve callchain processing performance (Frederic Weisbecker)
- Retain bfd reference to lookup source line numbers, greatly
optimizing, among other use cases, 'perf report -s srcline'
(Adrian Hunter)
- Improve callchain processing performance even more (Namhyung Kim)
- Add a perf.data file header window in the 'perf report' TUI,
associated with the 'i' hotkey, providing a counterpart to the
--header option in the stdio UI (Namhyung Kim)
- 'perf script':
- Add an option in 'perf script' to print the source line number
(Adrian Hunter)
- Add --header/--header-only options to 'script' and 'report', the
default is not tho show the header info, but as this has been the
default for some time, leave a single line explaining how to
obtain that information (Jiri Olsa)
- Add options to show comm, fork, exit and mmap PERF_RECORD_ events
(Namhyung Kim)
- Print callchains and symbols if they exist (David Ahern)
- 'perf timechart'
- Add backtrace support to CPU info
- Print pid along the name
- Add support for CPU topology
- Add new option --highlight'ing threads, be it by name or, if a
numeric value is provided, that run more than given duration
(Stanislav Fomichev)
- 'perf top':
- Make 'perf top -g' refer to callchains, for consistency with
other tools (David Ahern)
- 'perf trace':
- Handle old kernels where the "raw_syscalls" tracepoints were
called plain "syscalls" (David Ahern)
- Remove thread summary coloring, by Pekka Enberg.
- Honour -m option in 'trace', the tool was offering the option to
set the mmap size, but wasn't using it when doing the actual mmap
on the events file descriptors (Jiri Olsa)
- generic:
- Backport libtraceevent plugin support (trace-cmd repository, with
plugins for jbd2, hrtimer, kmem, kvm, mac80211, sched_switch,
function, xen, scsi, cfg80211 (Jiri Olsa)
- Print session information only if --stdio is given (Namhyung Kim)
Tooling side changes, developer visible (plumbing):
- Improve 'perf probe' exit path, release resources (Masami
Hiramatsu)
- Improve libtraceevent plugins exit path, allowing the registering
of an unregister handler to be called at exit time (Namhyung Kim)
- Add an alias to the build test makefile (make -C tools/perf
build-test) (Namhyung Kim)
- Get rid of die() and friends (good riddance!) in libtraceevent
(Namhyung Kim)
- Fix cross build problems related to pkgconfig and CROSS_COMPILE not
being propagated to the feature tests, leading to features being
tested in the host and then being enabled on the target (Mark
Rutland)
- Improve forked workload error reporting by sending the errno in the
signal data queueing integer field, using sigqueue and by doing the
signal setup in the evlist methods, removing open coded equivalents
in various tools (Arnaldo Carvalho de Melo)
- Do more auto exit cleanup chores in the 'evlist' destructor, so
that the tools don't have to all do that sequence (Arnaldo Carvalho
de Melo)
- Pack 'struct perf_session_env' and 'struct trace' (Arnaldo Carvalho
de Melo)
- Add test for building detached source tarballs (Arnaldo Carvalho de
Melo)
- Move some header files (tools/perf/ to tools/include/ to make them
available to other tools/ dwelling codebases (Namhyung Kim)
- Move logic to warn about kptr_restrict'ed kernels to separate
function in 'report' (Arnaldo Carvalho de Melo)
- Move hist browser selection code to separate function (Arnaldo
Carvalho de Melo)
- Move histogram entries collapsing to separate function (Arnaldo
Carvalho de Melo)
- Introduce evlist__for_each() & friends (Arnaldo Carvalho de Melo)
- Automate setup of FEATURE_CHECK_(C|LD)FLAGS-all variables (Jiri
Olsa)
- Move arch setup into seprate Makefile (Jiri Olsa)
- Make libtraceevent install target quieter (Jiri Olsa)
- Make tests/make output more compact (Jiri Olsa)
- Ignore generated files in feature-checks (Chunwei Chen)
- Introduce pevent_filter_strerror() in libtraceevent, similar in
purpose to libc's strerror() function (Namhyung Kim)
- Use perf_data_file methods to write output file in 'record' and
'inject' (Jiri Olsa)
- Use pr_*() functions where applicable in 'report' (Namhyumg Kim)
- Add 'machine' 'addr_location' struct to have full picture (machine,
thread, map, symbol, addr) for a (partially) resolved address,
reducing function signatures (Arnaldo Carvalho de Melo)
- Reduce code duplication in the histogram entry creation/insertion
(Arnaldo Carvalho de Melo)
- Auto allocate annotation histogram data structures (Arnaldo
Carvalho de Melo)
- No need to test against NULL before calling free, also set freed
memory in struct pointers to NULL, to help fixing use after free
bugs (Arnaldo Carvalho de Melo)
- Rename some struct DSO binary_type related members and methods, to
clarify its purpose and need for differentiation (symtab_type, ie
one is about the files .text, CFI, etc, i.e. its binary contents,
and the other is about where the symbol table came from (Arnaldo
Carvalho de Melo)
- Convert to new topic libraries, starting with an API one (sysfs,
debugfs, etc), renaming liblk in the process (Borislav Petkov)
- Get rid of some more panic() like error handling in libtraceevent.
(Namhyung Kim)
- Get rid of panic() like calls in libtraceevent (Namyung Kim)
- Start carving out symbol parsing routines (perf, just moving
routines to topic files in tools/lib/symbol/, tools that want to
use it need to integrate it directly, ie no
tools/lib/symbol/Makefile is provided (Arnaldo Carvalho de Melo)
- Assorted refactoring patches, moving code around and adding utility
evlist methods that will be used in the IPT patchset (Adrian
Hunter)
- Assorted mmap_pages handling fixes (Adrian Hunter)
- Several man pages typo fixes (Dongsheng Yang)
- Get rid of several die() calls in libtraceevent (Namhyung Kim)
- Use basename() in a more robust way, to avoid problems related to
different system library implementations for that function
(Stephane Eranian)
- Remove open coded management of short_name_allocated member (Adrian
Hunter)
- Several cleanups in the "dso" methods, constifying some parameters
and renaming some fields to clarify its purpose (Arnaldo Carvalho
de Melo)
- Add per-feature check flags, fixing libunwind related build
problems on some architectures (Jean Pihet)
- Do not disable source line lookup just because of one failure.
(Adrian Hunter)
- Several 'perf kvm' man page corrections (Dongsheng Yang)
- Correct the message in feature-libnuma checking, swowing the right
devel package names for various distros (Dongsheng Yang)
- Polish 'readn()' function and introduce its counterpart,
'writen()' (Jiri Olsa)
- Start moving timechart state from global variables to a 'perf_tool'
derived 'timechart' struct (Arnaldo Carvalho de Melo)
... and lots of fixes and improvements I forgot to list"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (282 commits)
perf tools: Remove unnecessary callchain cursor state restore on unmatch
perf callchain: Spare double comparison of callchain first entry
perf tools: Do proper comm override error handling
perf symbols: Export elf_section_by_name and reuse
perf probe: Release all dynamically allocated parameters
perf probe: Release allocated probe_trace_event if failed
perf tools: Add 'build-test' make target
tools lib traceevent: Unregister handler when xen plugin is unloaded
tools lib traceevent: Unregister handler when scsi plugin is unloaded
tools lib traceevent: Unregister handler when jbd2 plugin is is unloaded
tools lib traceevent: Unregister handler when cfg80211 plugin is unloaded
tools lib traceevent: Unregister handler when mac80211 plugin is unloaded
tools lib traceevent: Unregister handler when sched_switch plugin is unloaded
tools lib traceevent: Unregister handler when kvm plugin is unloaded
tools lib traceevent: Unregister handler when kmem plugin is unloaded
tools lib traceevent: Unregister handler when hrtimer plugin is unloaded
tools lib traceevent: Unregister handler when function plugin is unloaded
tools lib traceevent: Add pevent_unregister_print_function()
tools lib traceevent: Add pevent_unregister_event_handler()
tools lib traceevent: fix pointer-integer size mismatch
...
Pull IRQ changes from Ingo Molnar:
"The only change in this cycle is a CPU hotplug related spurious
warning fix"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/irq: Fix kbuild warning in smp_irq_move_cleanup_interrupt()
x86/irq: Fix do_IRQ() interrupt warning for cpu hotplug retriggered irqs
Pull strong stackprotector support from Ingo Molnar:
"This tree adds a CONFIG_CC_STACKPROTECTOR_STRONG=y, a new, stronger
stack canary checking method supported by the newest GCC versions (4.9
and later).
Here's the 'intensity comparison' between the various protection
modes:
- defconfig
11430641 kernel text size
36110 function bodies
- defconfig + CONFIG_CC_STACKPROTECTOR_REGULAR
11468490 kernel text size (+0.33%)
1015 of 36110 functions are stack-protected (2.81%)
- defconfig + CONFIG_CC_STACKPROTECTOR_STRONG via this patch
11692790 kernel text size (+2.24%)
7401 of 36110 functions are stack-protected (20.5%)
the strong model comes with non-trivial costs, which is why we
preserved the 'regular' and 'none' models as well"
* 'core-stackprotector-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
stackprotector: Introduce CONFIG_CC_STACKPROTECTOR_STRONG
stackprotector: Unify the HAVE_CC_STACKPROTECTOR logic between architectures
Pull core locking changes from Ingo Molnar:
- futex performance increases: larger hashes, smarter wakeups
- mutex debugging improvements
- lots of SMP ordering documentation updates
- introduce the smp_load_acquire(), smp_store_release() primitives.
(There are WIP patches that make use of them - not yet merged)
- lockdep micro-optimizations
- lockdep improvement: better cover IRQ contexts
- liblockdep at last. We'll continue to monitor how useful this is
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
futexes: Fix futex_hashsize initialization
arch: Re-sort some Kbuild files to hopefully help avoid some conflicts
futexes: Avoid taking the hb->lock if there's nothing to wake up
futexes: Document multiprocessor ordering guarantees
futexes: Increase hash table size for better performance
futexes: Clean up various details
arch: Introduce smp_load_acquire(), smp_store_release()
arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h
arch: Move smp_mb__{before,after}_atomic_{inc,dec}.h into asm/atomic.h
locking/doc: Rename LOCK/UNLOCK to ACQUIRE/RELEASE
mutexes: Give more informative mutex warning in the !lock->owner case
powerpc: Full barrier for smp_mb__after_unlock_lock()
rcu: Apply smp_mb__after_unlock_lock() to preserve grace periods
Documentation/memory-barriers.txt: Downgrade UNLOCK+BLOCK
locking: Add an smp_mb__after_unlock_lock() for UNLOCK+BLOCK barrier
Documentation/memory-barriers.txt: Document ACCESS_ONCE()
Documentation/memory-barriers.txt: Prohibit speculative writes
Documentation/memory-barriers.txt: Add long atomic examples to memory-barriers.txt
Documentation/memory-barriers.txt: Add needed ACCESS_ONCE() calls to memory-barriers.txt
Revert "smp/cpumask: Make CONFIG_CPUMASK_OFFSTACK=y usable without debug dependency"
...
Pull perf fixes from Ingo Molnar:
- an s2ram related fix on AMD systems
- a perf fault handling bug that is relatively old but which has become
much easier to trigger in v3.13 after commit e00b12e64b ("perf/x86:
Further optimize copy_from_user_nmi()")
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/amd/ibs: Fix waking up from S3 for AMD family 10h
x86, mm, perf: Allow recursive faults from interrupts
Pull networking fixes from David Miller:
1) The value choosen for the new SO_MAX_PACING_RATE socket option on
parisc was very poorly choosen, let's fix it while we still can.
From Eric Dumazet.
2) Our generic reciprocal divide was found to handle some edge cases
incorrectly, part of this is encoded into the BPF as deep as the JIT
engines themselves. Just use a real divide throughout for now.
From Eric Dumazet.
3) Because the initial lookup is lockless, the TCP metrics engine can
end up creating two entries for the same lookup key. Fix this by
doing a second lookup under the lock before we actually create the
new entry. From Christoph Paasch.
4) Fix scatter-gather list init in usbnet driver, from Bjørn Mork.
5) Fix unintended 32-bit truncation in cxgb4 driver's bit shifting.
From Dan Carpenter.
6) Netlink socket dumping uses the wrong socket state for timewait
sockets. Fix from Neal Cardwell.
7) Fix netlink memory leak in ieee802154_add_iface(), from Christian
Engelmayer.
8) Multicast forwarding in ipv4 can overflow the per-rule reference
counts, causing all multicast traffic to cease. Fix from Hannes
Frederic Sowa.
9) via-rhine needs to stop all TX queues when it resets the device,
from Richard Weinberger.
10) Fix RDS per-cpu accesses broken by the this_cpu_* conversions. From
Gerald Schaefer.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
s390/bpf,jit: fix 32 bit divisions, use unsigned divide instructions
parisc: fix SO_MAX_PACING_RATE typo
ipv6: simplify detection of first operational link-local address on interface
tcp: metrics: Avoid duplicate entries with the same destination-IP
net: rds: fix per-cpu helper usage
e1000e: Fix compilation warning when !CONFIG_PM_SLEEP
bpf: do not use reciprocal divide
be2net: add dma_mapping_error() check for dma_map_page()
bnx2x: Don't release PCI bars on shutdown
net,via-rhine: Fix tx_timeout handling
batman-adv: fix batman-adv header overhead calculation
qlge: Fix vlan netdev features.
net: avoid reference counter overflows on fib_rules in multicast forwarding
dm9601: add USB IDs for new dm96xx variants
MAINTAINERS: add virtio-dev ML for virtio
ieee802154: Fix memory leak in ieee802154_add_iface()
net: usbnet: fix SG initialisation
inet_diag: fix inet_diag_dump_icsk() to use correct state for timewait sockets
cxgb4: silence shift wrapping static checker warning
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.14 (GNU/Linux)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=ifJc
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fix from Paolo Bonzini:
"Fix for a brown paper bag bug. Thanks to Drew Jones for noticing"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: x86: fix apic_base enable check
This is a cleanup proposed by coccinelle. It replaces memcpy with struct
assignment on intel-mid's sfi layer.
Generated by: coccinelle/misc/memcpy-assign.cocci
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Link: http://lkml.kernel.org/r/1389917588-9785-1-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This patch does cleanup on all intel mid platform code that uses
gpio_get_by_name() function. From now on they should check for any error
code instead of only hardcoded -1.
There are no functional changes from this change.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1389913624-9149-3-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
When Intel MID finds a match between SFI table from FW and registered
SFI devices, it will always register a device regardless the platform
code was successful or not.
This patch adds an extra option for platform code to return error code
and abort device registration on SFI table parsing.
This patch does not contain any functional changes for current intel
mid platform code.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1389913624-9149-2-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
On AMD family 10h we see following error messages while waking up from
S3 for all non-boot CPUs leading to a failed IBS initialization:
Enabling non-boot CPUs ...
smpboot: Booting Node 0 Processor 1 APIC 0x1
[Firmware Bug]: cpu 1, try to use APIC500 (LVT offset 0) for vector 0x400, but the register is already in use for vector 0xf9 on another cpu
perf: IBS APIC setup failed on cpu #1
process: Switch to broadcast mode on CPU1
CPU1 is up
...
ACPI: Waking up from system sleep state S3
Reason for this is that during suspend the LVT offset for the IBS
vector gets lost and needs to be reinialized while resuming.
The offset is read from the IBSCTL msr. On family 10h the offset needs
to be 1 as offset 0 is used for the MCE threshold interrupt, but
firmware assings it for IBS to 0 too. The kernel needs to reprogram
the vector. The msr is a readonly node msr, but a new value can be
written via pci config space access. The reinitialization is
implemented for family 10h in setup_ibs_ctl() which is forced during
IBS setup.
This patch fixes IBS setup after waking up from S3 by adding
resume/supend hooks for the boot cpu which does the offset
reinitialization.
Marking it as stable to let distros pick up this fix.
Signed-off-by: Robert Richter <rric@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org> v3.2..
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1389797849-5565-1-git-send-email-rric.net@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Waiman managed to trigger a PMI while in a emulate_vsyscall() fault,
the PMI in turn managed to trigger a fault while obtaining a stack
trace. This triggered the sig_on_uaccess_error recursive fault logic
and killed the process dead.
Fix this by explicitly excluding interrupts from the recursive fault
logic.
Reported-and-Tested-by: Waiman Long <waiman.long@hp.com>
Fixes: e00b12e64b ("perf/x86: Further optimize copy_from_user_nmi()")
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Scott J Norton <scott.norton@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140110200603.GJ7572@laptop.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull locking fixes from Ingo Molnar:
"Two fixes from lockdep coverage of seqlocks, which fix deadlocks on
lockdep-enabled ARM systems"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched_clock: Disable seqlock lockdep usage in sched_clock()
seqlock: Use raw_ prefix instead of _no_lockdep
At first Jakub Zawadzki noticed that some divisions by reciprocal_divide
were not correct. (off by one in some cases)
http://www.wireshark.org/~darkjames/reciprocal-buggy.c
He could also show this with BPF:
http://www.wireshark.org/~darkjames/set-and-dump-filter-k-bug.c
The reciprocal divide in linux kernel is not generic enough,
lets remove its use in BPF, as it is not worth the pain with
current cpus.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Jakub Zawadzki <darkjames-ws@darkjames.pl>
Cc: Mircea Gherzan <mgherzan@gmail.com>
Cc: Daniel Borkmann <dxchgb@gmail.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Matt Evans <matt@ozlabs.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
We want to support all Intel MID (Mobile Internet Device) platforms
with a single config selection. This patch removes deprecated
CONFIG_X86_MDFLD and X86_WANT_INTEL_MID options in favor of having
CONFIG_X86_INTEL_MID only.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1387244246-20714-1-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This code was partially based on Mark Brown's previous work.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1387224459-25746-4-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: Fei Yang <fei.yang@intel.com>
Cc: Mark F. Brown <mark.f.brown@intel.com>
Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This patch adds Clovertrail support on intel-mid and makes it more
flexible to support other SoCs.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1387224459-25746-3-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Fei Yang <fei.yang@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
In order make the driver more portable and support other Intel MID
(Mobile Internet Device) platforms we need to move Medfield code from
intel-mid.c core to its own mfld.c file.
This patch contains no functional changes.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1387224459-25746-2-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Make disabled_cpu_apicid static and read_mostly, and fix a couple of
typos.
Reported-by: Ingo Molnar <mingo@kernel.org>
Link: http://lkml.kernel.org/r/20140115182511.GA22737@gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Add disable_cpu_apicid kernel parameter. To use this kernel parameter,
specify an initial APIC ID of the corresponding CPU you want to
disable.
This is mostly used for the kdump 2nd kernel to disable BSP to wake up
multiple CPUs without causing system reset or hang due to sending INIT
from AP to BSP.
Kdump users first figure out initial APIC ID of the BSP, CPU0 in the
1st kernel, for example from /proc/cpuinfo and then set up this kernel
parameter for the 2nd kernel using the obtained APIC ID.
However, doing this procedure at each boot time manually is awkward,
which should be automatically done by user-land service scripts, for
example, kexec-tools on fedora/RHEL distributions.
This design is more flexible than disabling BSP in kernel boot time
automatically in that in kernel boot time we have no choice but
referring to ACPI/MP table to obtain initial APIC ID for BSP, meaning
that the method is not applicable to the systems without such BIOS
tables.
One assumption behind this design is that users get initial APIC ID of
the BSP in still healthy state and so BSP is uniquely kept in
CPU0. Thus, through the kernel parameter, only one initial APIC ID can
be specified.
In a comparison with disabled_cpu_apicid, we use read_apic_id(), not
boot_cpu_physical_apicid, because on some platforms, the variable is
modified to the apicid reported as BSP through MP table and this
function is executed with the temporarily modified
boot_cpu_physical_apicid. As a result, disabled_cpu_apicid kernel
parameter doesn't work well for apicids of APs.
Fixing the wrong handling of boot_cpu_physical_apicid requires some
reviews and tests beyond some platforms and it could take some
time. The fix here is a kind of workaround to focus on the main topic
of this patch.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Link: http://lkml.kernel.org/r/20140115064458.1545.38775.stgit@localhost6.localdomain6
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Commit e66d2ae7c6 moved the assignment
vcpu->arch.apic_base = value above a condition with
(vcpu->arch.apic_base ^ value), causing that check
to always fail. Use old_value, vcpu->arch.apic_base's
old value, in the condition instead.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Having u32 and struct cpuinfo_x86 * by the same name is not very smart,
although it was ok in this case due to the limited scope of u32 c and it
being used only once in there.
Fix this.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1389786735-16751-1-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Currently we do a read, a dummy write and a final read to fetch
the error code. The value from the final read is taken.
This is not the recommended way and leads to corrupted/lost ESR
values.
Intel(c) 64 and IA-32 Architectures Software Developer's Manual,
Combined Volumes 1, 2ABC, 3ABC, Section 10.5.3 states:
Before attempt to read from the ESR, software should first
write to it. (The value written does not affect the values read
subsequently; only zero may be written in x2APIC mode.) This
write clears any previously logged errors and updates the ESR
with any errors detected since the last write to the ESR.
This write also rearms the APIC error interrupt triggering
mechanism.
This patch removes the first read such that we are conform with
the manual.
On my (very old) Pentium MMX SMP system this patch fixes the
issue that APIC errors:
a) are not always reported and
b) are reported with false error numbers.
Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: seiji.aguchi@hds.com
Cc: rientjes@google.com
Cc: konrad.wilk@oracle.com
Cc: bp@alien8.de
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1389685487-20872-1-git-send-email-richard@nod.at
Signed-off-by: Ingo Molnar <mingo@kernel.org>
We've grown a bunch of microcode loader files all prefixed with
"microcode_". They should be under cpu/ because this is strictly
CPU-related functionality so do that and drop the prefix since they're
in their own directory now which gives that prefix. :)
While at it, drop MICROCODE_INTEL_LIB config item and stash the
functionality under CONFIG_MICROCODE_INTEL as it was its only user.
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
The original idea to use the microcode cache for the APs doesn't pan out
because we do memory allocation there very early and with IRQs disabled
and we don't want to involve GFP_ATOMIC allocations. Not if it can be
helped.
Thus, extend the caching of the BSP patch approach to the APs and
iterate over the ucode in the initrd instead of using the cache. We
still save the relevant patches to it but later, right before we
jettison the initrd.
While at it, fix early ucode loading on 32-bit too.
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
We want to use those in AMD's early loading path too. Also, add a
native_wrmsrl variant.
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
The ramdisk can possibly get relocated if the whole image is not mapped.
And since we're going over it in the microcode loader and fishing out
the relevant microcode patches, we want access it at its new location.
Thus, export it.
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
With various drivers wanting to inject idle time; we get people
calling idle routines outside of the idle loop proper.
Therefore we need to be extra careful about not missing
TIF_NEED_RESCHED -> PREEMPT_NEED_RESCHED propagations.
While looking at this, I also realized there's a small window in the
existing idle loop where we can miss TIF_NEED_RESCHED; when it hits
right after the tif_need_resched() test at the end of the loop but
right before the need_resched() test at the start of the loop.
So move preempt_fold_need_resched() out of the loop where we're
guaranteed to have TIF_NEED_RESCHED set.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-x9jgh45oeayzajz2mjt0y7d6@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Use a ring-buffer like multi-version object structure which allows
always having a coherent object; we use this to avoid having to
disable IRQs while reading sched_clock() and avoids a problem when
getting an NMI while changing the cyc2ns data.
MAINLINE PRE POST
sched_clock_stable: 1 1 1
(cold) sched_clock: 329841 331312 257223
(cold) local_clock: 301773 310296 309889
(warm) sched_clock: 38375 38247 25280
(warm) local_clock: 100371 102713 85268
(warm) rdtsc: 27340 27289 24247
sched_clock_stable: 0 0 0
(cold) sched_clock: 382634 372706 301224
(cold) local_clock: 396890 399275 399870
(warm) sched_clock: 38194 38124 25630
(warm) local_clock: 143452 148698 129629
(warm) rdtsc: 27345 27365 24307
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-s567in1e5ekq2nlyhn8f987r@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fengguang Wu's 0day kernel build service reported the following build warning:
arch/x86/kernel/apic/io_apic.c:2211
smp_irq_move_cleanup_interrupt() warn: always true condition '(irq <= -1) => (0-u32max <= (-1))'
because irq is defined as an unsigned int instead of an int.
Fix this trivial error by redefining irq as a signed int. The
remaining consumers of the int are okay.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Link: http://lkml.kernel.org/r/1389620420-7110-1-git-send-email-prarit@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
There are no __cycles_2_ns() users outside of arch/x86/kernel/tsc.c,
so move it there.
There are no cycles_2_ns() users.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-01lslnavfgo3kmbo4532zlcj@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Add the syscalls needed for supporting scheduling algorithms
with extended scheduling parameters (e.g., SCHED_DEADLINE).
In general, it makes possible to specify a periodic/sporadic task,
that executes for a given amount of runtime at each instance, and is
scheduled according to the urgency of their own timing constraints,
i.e.:
- a (maximum/typical) instance execution time,
- a minimum interval between consecutive instances,
- a time constraint by which each instance must be completed.
Thus, both the data structure that holds the scheduling parameters of
the tasks and the system calls dealing with it must be extended.
Unfortunately, modifying the existing struct sched_param would break
the ABI and result in potentially serious compatibility issues with
legacy binaries.
For these reasons, this patch:
- defines the new struct sched_attr, containing all the fields
that are necessary for specifying a task in the computational
model described above;
- defines and implements the new scheduling related syscalls that
manipulate it, i.e., sched_setattr() and sched_getattr().
Syscalls are introduced for x86 (32 and 64 bits) and ARM only, as a
proof of concept and for developing and testing purposes. Making them
available on other architectures is straightforward.
Since no "user" for these new parameters is introduced in this patch,
the implementation of the new system calls is just identical to their
already existing counterpart. Future patches that implement scheduling
policies able to exploit the new data structure must also take care of
modifying the sched_*attr() calls accordingly with their own purposes.
Signed-off-by: Dario Faggioli <raistlin@linux.it>
[ Rewrote to use sched_attr. ]
Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
[ Removed sched_setscheduler2() for now. ]
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1383831828-15501-3-git-send-email-juri.lelli@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJS0miqAAoJEHm+PkMAQRiGbfgIAJSWEfo8ludknhPcHJabBtxu
75SQAKJlL3sBVnxEc58Rtt8gsKYQIrm4IY5Slunklsn04RxuDUIQMgFoAYR5gQwz
+Myqkw/HOqDe5VStGxtLYpWnfglxVwGDCd7ISfL9AOVy5adMWBxh4Tv+qqQc7aIZ
eF7dy+DD+C6Q3Z5OoV8s0FZDxse29vOf17Nki7+7t8WMqyegYwjoOqNeqocGKsPi
eHLrJgTl4T6jB4l9LKKC154DSKjKOTSwZMWgwK8mToyNLT/ufCiKgXloIjEvZZcY
VVKUtncdHiTf+iqVojgpGBzOEeB5DM83iiapFeDiJg8C9yBzvT8lBtA9aPb5Wgw=
=lEeV
-----END PGP SIGNATURE-----
Merge tag 'v3.13-rc8' into core/locking
Refresh the tree with the latest fixes, before applying new changes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
During heavy CPU-hotplug operations the following spurious kernel warnings
can trigger:
do_IRQ: No ... irq handler for vector (irq -1)
[ See: https://bugzilla.kernel.org/show_bug.cgi?id=64831 ]
When downing a cpu it is possible that there are unhandled irqs
left in the APIC IRR register. The following code path shows
how the problem can occur:
1. CPU 5 is to go down.
2. cpu_disable() on CPU 5 executes with interrupt flag cleared
by local_irq_save() via stop_machine().
3. IRQ 12 asserts on CPU 5, setting IRR but not ISR because
interrupt flag is cleared (CPU unabled to handle the irq)
4. IRQs are migrated off of CPU 5, and the vectors' irqs are set
to -1. 5. stop_machine() finishes cpu_disable()
6. cpu_die() for CPU 5 executes in normal context.
7. CPU 5 attempts to handle IRQ 12 because the IRR is set for
IRQ 12. The code attempts to find the vector's IRQ and cannot
because it has been set to -1. 8. do_IRQ() warning displays
warning about CPU 5 IRQ 12.
I added a debug printk to output which CPU & vector was
retriggered and discovered that that we are getting bogus
events. I see a 100% correlation between this debug printk in
fixup_irqs() and the do_IRQ() warning.
This patchset resolves this by adding definitions for
VECTOR_UNDEFINED(-1) and VECTOR_RETRIGGERED(-2) and modifying
the code to use them.
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=64831
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Reviewed-by: Rui Wang <rui.y.wang@intel.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Seiji Aguchi <seiji.aguchi@hds.com>
Cc: Yang Zhang <yang.z.zhang@Intel.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: janet.morgan@Intel.com
Cc: tony.luck@Intel.com
Cc: ruiv.wang@gmail.com
Link: http://lkml.kernel.org/r/1388938252-16627-1-git-send-email-prarit@redhat.com
[ Cleaned up the code a bit. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
