20 Dec, 2014
4 commits
-
Pull x86 apic updates from Thomas Gleixner:
"After stopping the full x86/apic branch, I took some time to go
through the first block of patches again, which are mostly cleanups
and preparatory work for the irqdomain conversion and ioapic hotplug
support.Unfortunaly one of the real problematic commits was right at the
beginning, so I rebased this portion of the pending patches without
the offenders.It would be great to get this into 3.19. That makes reworking the
problematic parts simpler. The usual tip testing did not unearth any
issues and it is fully bisectible now.I'm pretty confident that this wont affect the calmness of the xmas
season.Changes:
- Split the convoluted io_apic.c code into domain specific parts
(vector, ioapic, msi, htirq)
- Introduce proper helper functions to retrieve irq specific data
instead of open coded dereferencing of pointers
- Preparatory work for ioapic hotplug and irqdomain conversion
- Removal of the non functional pci-ioapic driver
- Removal of unused irq entry stubs
- Make native_smp_prepare_cpus() preemtible to avoid GFP_ATOMIC
allocations for everything which is called from there.
- Small cleanups and fixes"* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
iommu/amd: Use helpers to access irq_cfg data structure associated with IRQ
iommu/vt-d: Use helpers to access irq_cfg data structure associated with IRQ
x86: irq_remapping: Use helpers to access irq_cfg data structure associated with IRQ
x86, irq: Use helpers to access irq_cfg data structure associated with IRQ
x86, irq: Make MSI and HT_IRQ indepenent of X86_IO_APIC
x86, irq: Move IRQ initialization routines from io_apic.c into vector.c
x86, irq: Move IOAPIC related declarations from hw_irq.h into io_apic.h
x86, irq: Move HT IRQ related code from io_apic.c into htirq.c
x86, irq: Move PCI MSI related code from io_apic.c into msi.c
x86, irq: Replace printk(KERN_LVL) with pr_lvl() utilities
x86, irq: Make UP version of irq_complete_move() an inline stub
x86, irq: Move local APIC related code from io_apic.c into vector.c
x86, irq: Introduce helpers to access struct irq_cfg
x86, irq: Protect __clear_irq_vector() with vector_lock
x86, irq: Rename local APIC related functions in io_apic.c as apic_xxx()
x86, irq: Refine hw_irq.h to prepare for irqdomain support
x86, irq: Convert irq_2_pin list to generic list
x86, irq: Kill useless parameter 'irq_attr' of IO_APIC_get_PCI_irq_vector()
x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI
x86, irq: Introduce helper to check whether an IOAPIC has been registered
... -
Pull x86 MPX fixes from Thomas Gleixner:
"Three updates for the new MPX infrastructure:
- Use the proper error check in the trap handler
- Add a proper config option for it
- Bring documentation up to date"* 'x86-mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, mpx: Give MPX a real config option prompt
x86, mpx: Update documentation
x86_64/traps: Fix always true condition -
Pull x86 fix from Ingo Molnar:
"This contains a single TLS ABI validation fix from Andy Lutomirski"* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/tls: Don't validate lm in set_thread_area() after all -
Pull perf fixes and cleanups from Ingo Molnar:
"A kernel fix plus mostly tooling fixes, but also some tooling
restructuring and cleanups"* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
perf: Fix building warning on ARM 32
perf symbols: Fix use after free in filename__read_build_id
perf evlist: Use roundup_pow_of_two
tools: Adopt roundup_pow_of_two
perf tools: Make the mmap length autotuning more robust
tools: Adopt rounddown_pow_of_two and deps
tools: Adopt fls_long and deps
tools: Move bitops.h from tools/perf/util to tools/
tools: Introduce asm-generic/bitops.h
tools lib: Move asm-generic/bitops/find.h code to tools/include and tools/lib
tools: Whitespace prep patches for moving bitops.h
tools: Move code originally from asm-generic/atomic.h into tools/include/asm-generic/
tools: Move code originally from linux/log2.h to tools/include/linux/
tools: Move __ffs implementation to tools/include/asm-generic/bitops/__ffs.h
perf evlist: Do not use hard coded value for a mmap_pages default
perf trace: Let the perf_evlist__mmap autosize the number of pages to use
perf evlist: Improve the strerror_mmap method
perf evlist: Clarify sterror_mmap variable names
perf evlist: Fixup brown paper bag on "hint" for --mmap-pages cmdline arg
perf trace: Provide a better explanation when mmap fails
...
19 Dec, 2014
2 commits
-
Pull more ACPI and power management updates from Rafael Wysocki:
"These are regression fixes (leds-gpio, ACPI backlight driver,
operating performance points library, ACPI device enumeration
messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device
PM), some cleanups in the operating performance points (OPP)
framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of
minor intel_pstate driver changes, a new MAINTAINERS entry for it and
an ACPI fan driver change needed for better support of thermal
management in user space.Specifics:
- Fix a regression in leds-gpio introduced by a recent commit that
inadvertently changed the name of one of the properties used by the
driver (Fabio Estevam).- Fix a regression in the ACPI backlight driver introduced by a
recent fix that missed one special case that had to be taken into
account (Aaron Lu).- Drop the level of some new kernel messages from the ACPI core
introduced by a recent commit to KERN_DEBUG which they should have
used from the start and drop some other unuseful KERN_ERR messages
printed by ACPI (Rafael J Wysocki).- Revert an incorrect commit modifying the cpupower tool (Prarit
Bhargava).- Fix two regressions introduced by recent commits in the OPP library
and clean up some existing minor issues in that code (Viresh
Kumar).- Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the
tree (or drop it where that can be done) in order to make it
possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf
Hansson, Ludovic Desroches).There will be one more "CONFIG_PM_RUNTIME removal" batch after this
one, because some new uses of it have been introduced during the
current merge window, but that should be sufficient to finally get
rid of it.- Make the ACPI EC driver more robust against race conditions related
to GPE handler installation failures (Lv Zheng).- Prevent the ACPI device PM core code from attempting to disable
GPEs that it has not enabled which confuses ACPICA and makes it
report errors unnecessarily (Rafael J Wysocki).- Add a "force" command line switch to the intel_pstate driver to
make it possible to override the blacklisting of some systems in
that driver if needed (Ethan Zhao).- Improve intel_pstate code documentation and add a MAINTAINERS entry
for it (Kristen Carlson Accardi).- Make the ACPI fan driver create cooling device interfaces witn
names that reflect the IDs of the ACPI device objects they are
associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B").That's necessary for user space thermal management tools to be able
to connect the fans with the parts of the system they are supposed
to be cooling properly. From Srinivas Pandruvada"* tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
MAINTAINERS: add entry for intel_pstate
ACPI / video: update the skip case for acpi_video_device_in_dod()
power / PM: Eliminate CONFIG_PM_RUNTIME
NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
ACPI / EC: Fix unexpected ec_remove_handlers() invocations
Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()"
tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c
PM: Remove the SET_PM_RUNTIME_PM_OPS() macro
mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro
PM / Kconfig: Replace PM_RUNTIME with PM in dependencies
ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
ACPI / PM: Do not disable wakeup GPEs that have not been enabled
ACPI / utils: Drop error messages from acpi_evaluate_reference()
... -
Pull KVM update from Paolo Bonzini:
"3.19 changes for KVM:- spring cleaning: removed support for IA64, and for hardware-
assisted virtualization on the PPC970- ARM, PPC, s390 all had only small fixes
For x86:
- small performance improvements (though only on weird guests)
- usual round of hardware-compliancy fixes from Nadav
- APICv fixes
- XSAVES support for hosts and guests. XSAVES hosts were broken
because the (non-KVM) XSAVES patches inadvertently changed the KVM
userspace ABI whenever XSAVES was enabled; hence, this part is
going to stable. Guest support is just a matter of exposing the
feature and CPUID leaves support"* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (179 commits)
KVM: move APIC types to arch/x86/
KVM: PPC: Book3S: Enable in-kernel XICS emulation by default
KVM: PPC: Book3S HV: Improve H_CONFER implementation
KVM: PPC: Book3S HV: Fix endianness of instruction obtained from HEIR register
KVM: PPC: Book3S HV: Remove code for PPC970 processors
KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions
KVM: PPC: Book3S HV: Simplify locking around stolen time calculations
arch: powerpc: kvm: book3s_paired_singles.c: Remove unused function
arch: powerpc: kvm: book3s_pr.c: Remove unused function
arch: powerpc: kvm: book3s.c: Remove some unused functions
arch: powerpc: kvm: book3s_32_mmu.c: Remove unused function
KVM: PPC: Book3S HV: Check wait conditions before sleeping in kvmppc_vcore_blocked
KVM: PPC: Book3S HV: ptes are big endian
KVM: PPC: Book3S HV: Fix inaccuracies in ICP emulation for H_IPI
KVM: PPC: Book3S HV: Fix KSM memory corruption
KVM: PPC: Book3S HV: Fix an issue where guest is paused on receiving HMI
KVM: PPC: Book3S HV: Fix computation of tlbie operand
KVM: PPC: Book3S HV: Add missing HPTE unlock
KVM: PPC: BookE: Improve irq inject tracepoint
arm/arm64: KVM: Require in-kernel vgic for the arch timers
...
18 Dec, 2014
3 commits
-
It turns out that there's a lurking ABI issue. GCC, when
compiling this in a 32-bit program:struct user_desc desc = {
.entry_number = idx,
.base_addr = base,
.limit = 0xfffff,
.seg_32bit = 1,
.contents = 0, /* Data, grow-up */
.read_exec_only = 0,
.limit_in_pages = 1,
.seg_not_present = 0,
.useable = 0,
};will leave .lm uninitialized. This means that anything in the
kernel that reads user_desc.lm for 32-bit tasks is unreliable.Revert the .lm check in set_thread_area(). The value never did
anything in the first place.Fixes: 0e58af4e1d21 ("x86/tls: Disallow unusual TLS segments")
Signed-off-by: Andy Lutomirski
Acked-by: Thomas Gleixner
Cc: stable@vger.kernel.org # Only if 0e58af4e1d21 is backported
Cc: Linus Torvalds
Link: http://lkml.kernel.org/r/d7875b60e28c512f6a6fc0baf5714d58e7eaadbb.1418856405.git.luto@amacapital.net
Signed-off-by: Ingo Molnar -
They are not used anymore by IA64, move them away.
Signed-off-by: Paolo Bonzini
-
My commit 26178ec11ef3 ("x86: mm: consolidate VM_FAULT_RETRY handling")
had a really stupid typo: the FAULT_FLAG_USER bit is in the 'flags'
variable, not the 'fault' variable. Duh,The one silver lining in this is that Dave finding this at least
confirms that trinity actually triggers this special path easily, in a
way normal use does not.Reported-by: Dave Jones
Signed-off-by: Linus Torvalds
17 Dec, 2014
1 commit
-
Pull additional xen update from David Vrabel:
"Xen: additional features for 3.19-rc0- Linear p2m for x86 PV guests which simplifies the p2m code,
improves performance and will allow for > 512 GB PV guests in the
future.A last-minute, configuration specific issue was discovered with this
change which is why it was not included in my previous pull request.
This is now been fixed and tested"* tag 'stable/for-linus-3.19-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: switch to post-init routines in xen mmu.c earlier
Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single"
xen: annotate xen_set_identity_and_remap_chunk() with __init
xen: introduce helper functions to do safe read and write accesses
xen: Speed up set_phys_to_machine() by using read-only mappings
xen: switch to linear virtual mapped sparse p2m list
xen: Hide get_phys_to_machine() to be able to tune common path
x86: Introduce function to get pmd entry pointer
xen: Delay invalidating extra memory
xen: Delay m2p_override initialization
xen: Delay remapping memory of pv-domain
xen: use common page allocation function in p2m.c
xen: Make functions static
xen: fix some style issues in p2m.c
16 Dec, 2014
30 commits
-
Use helpers to access irq_cfg data structure associated with IRQ,
instead of accessing irq_data->chip_data directly. Later we can
rewrite those helpers to support hierarchy irqdomain.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414397531-28254-17-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Now we have splitted functions to support MSI and HT_IRQ into vector.c,
and they have no dependency on IOAPIC any more. So change Kconfig files
to make MSI and HT_IRQ independent of X86_IO_APIC.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Link: http://lkml.kernel.org/r/1414397531-28254-16-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Move IRQ initialization routines from io_apic.c into vector.c,
preparing for enabling hierarchy irqdomain.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414397531-28254-15-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Clean up code by moving IOAPIC related declarations from hw_irq.h into
io_apic.h.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: H. Peter Anvin
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Prarit Bhargava
Cc: Grant Likely
Cc: Vivek Goyal
Cc: Baoquan He
Cc: Matt Fleming
Cc: Fenghua Yu
Cc: Christian Gmeiner
Cc: Aubrey
Cc: Ryan Desfosses
Cc: Quentin Lambert
Cc: Rafael J. Wysocki
Link: http://lkml.kernel.org/r/1414397531-28254-14-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Create arch/x86/kernel/apic/htirq.c to host Hypertransport IRQ related
code, preparing for enabling hierarchy irqdomain.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414397531-28254-13-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Create arch/x86/kernel/apic/msi.c to host MSI related code,
preparing for enabling hierarchy irqdomain.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Rafael J. Wysocki
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414397531-28254-12-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Replace printk(KENR_LVL) with pr_lvl() to keep checkpatch script silent.
Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Link: http://lkml.kernel.org/r/1414397531-28254-11-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
No point for having an empty real function.
Signed-off-by: Thomas Gleixner
-
Create arch/x86/kernel/apic/vector.c to host local APIC related code,
prepare for making MSI/HT_IRQ independent of IOAPIC.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Prarit Bhargava
Cc: Grant Likely
Link: http://lkml.kernel.org/r/1414397531-28254-10-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Change irq_cfg() from static to extern, also introduce helper function
irqd_cfg(). Later we can rewrite these two helpers when enabling
hierarchy irqdomain.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Prarit Bhargava
Cc: Grant Likely
Link: http://lkml.kernel.org/r/1414397531-28254-9-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Function __clear_irq_vector() accesses vector related data structure,
so protect it with vector_lock. Also rename it as clear_irq_vector().Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414397531-28254-8-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Rename local APIC related functions in io_apic.c as apic_xxx() instead
of ioapic_xxx(), later they will be moved into separate file.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Prarit Bhargava
Cc: Grant Likely
Link: http://lkml.kernel.org/r/1414397531-28254-7-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Refine hw_irq.h to prepare for irqdomain support by:
1) guarding common APIC related interfaces with CONFIG_X86_LOCAL_APIC
2) guarding interrupt remapping related interfaces with CONFIG_IRQ_REMAP
3) guarding IOAPIC related interfaces with CONFIG_X86_IO_APICNo functional changes.
Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414397531-28254-6-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Use generic list to replace private list implementation so we can use
the existing helper functions.Signed-off-by: Yinghai Lu
Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Sebastian Andrzej Siewior
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Borislav Petkov
Cc: Prarit Bhargava
Cc: Grant Likely
Link: http://lkml.kernel.org/r/1414397531-28254-5-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner
Cc: Konrad Rzeszutek Wilk
Cc: Sebastian Andrzej Siewior
Cc: Joerg Roedel -
None of the callers requires irq_attr to be filled
in. IO_APIC_get_PCI_irq_vector() does not do anything useful with it
either.Remove the parameter and fixup the call sites.
[ tglx: Massaged changelog ]
Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Prarit Bhargava
Cc: Grant Likely
Cc: Ryan Desfosses
Cc: Quentin Lambert
Cc: Rafael J. Wysocki
Link: http://lkml.kernel.org/r/1414397531-28254-4-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
The IOAPIC has logic to track IOAPIC pin status, so there's no need for
special treatment for GSI used by ACPI SCI in function mp_register_gsi()
and mp_unregister_gsi().Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Len Brown
Cc: Pavel Machek
Link: http://lkml.kernel.org/r/1414397531-28254-2-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Introduce acpi_ioapic_registered() to check whether an IOAPIC has already
been registered, it will be used when enabling IOAPIC hotplug.Signed-off-by: Jiang Liu
Acked-by: Pavel Machek
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Len Brown
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414387308-27148-18-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Implement acpi_unregister_ioapic() to support ACPI based IOAPIC hot-removal.
An IOAPIC could only be removed when all its pins are unused.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Len Brown
Cc: Pavel Machek
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414387308-27148-17-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Implement acpi_register_ioapic() and enhance mp_register_ioapic()
to support ACPI based IOAPIC hot-addition.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Len Brown
Cc: Pavel Machek
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414387308-27148-16-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
We are going to support ACPI based IOAPIC hotplug, so introduce a mutex
to protect IOAPIC data structures from IOAPIC hotplug. We choose to
serialize in ACPI instead of in the IOAPIC core because:1) currently we only plan to support ACPI based IOAPIC hotplug
2) it's much more cleaner and easier
3) It does't affect IOAPIC discovered by devicetree, SFI and mpparse.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Len Brown
Cc: Pavel Machek
Link: http://lkml.kernel.org/r/1414908273-7552-15-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Refine mp_register_ioapic() to prepare for IOAPIC hotplug by:
1) change return value from void to int.
2) check for gsi range conflicts
3) check for IOAPIC physical address conflicts
4) enhance the way to allocate IOAPIC indexSigned-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414387308-27148-14-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
To keep balance of IOAPIC pin reference count, we need to protect
pirq_enable_irq(), acpi_pci_irq_enable() and intel_mid_pci_irq_enable()
from reentrance. There are two cases which will cause reentrance.The first case is caused by suspend/hibernation. If pcibios_disable_irq
is called during suspending/hibernating, we don't release the assigned
IRQ number, otherwise it may break the suspend/hibernation. So late when
pcibios_enable_irq is called during resume, we shouldn't allocate IRQ
number again.The second case is that function acpi_pci_irq_enable() may be called
twice for PCI devices present at boot time as below:
1) pci_acpi_init()
--> acpi_pci_irq_enable() if pci_routeirq is true
2) pci_enable_device()
--> pcibios_enable_device()
--> acpi_pci_irq_enable()
We can't kill kernel parameter pci_routeirq yet because it's still
needed for debugging purpose.So flag irq_managed is introduced to track whether IRQ number is
assigned by OS and to protect pirq_enable_irq(), acpi_pci_irq_enable()
and intel_mid_pci_irq_enable() from reentrance.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Len Brown
Link: http://lkml.kernel.org/r/1414387308-27148-13-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Remove __init marker for functions which will be used by IOAPIC hotplug
at runtime.Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414387308-27148-12-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Perfer the assigned ID in APIC ID register for x86_64 if it's still
available.[ tglx: Added comments ]
Signed-off-by: Yinghai Lu
Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Sebastian Andrzej Siewior
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414387308-27148-11-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Split out alloc_ioapic_save_registers() from early_irq_init(),
so it could be used for ioapic hotplug later.Signed-off-by: Yinghai Lu
Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Sebastian Andrzej Siewior
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Borislav Petkov
Cc: Grant Likely
Cc: Prarit Bhargava
Link: http://lkml.kernel.org/r/1414387308-27148-10-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
There is no reason to keep preemption disabled in this function.
We only have two other threads live: kthreadd and idle. Neither of
them is going to preempt. But that preempt_disable forces all the code
inside to do GFP_ATOMIC allocations which is just insane.Remove it.
Signed-off-by: Thomas Gleixner
Tested-by: Borislav Petkov
Cc: Jiang Liu
Cc: Joerg Roedel
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20141205084147.153643952@linutronix.de
Signed-off-by: Thomas Gleixner -
When X86_LOCAL_APIC (i.e. unconditionally on x86-64),
first_system_vector will never end up being higher than
LOCAL_TIMER_VECTOR (0xef), and hence building stubs for vectors
0xef...0xff is pointlessly reducing code density. Deal with this at
build time already.Taking into consideration that X86_64 implies X86_LOCAL_APIC, also
simplify (and hence make easier to read and more consistent with the
change done here) some #if-s in arch/x86/kernel/irqinit.c.While we could further improve the packing of the IRQ entry stubs (the
four ones now left in the last set could be fit into the four padding
bytes each of the final four sets have) this doesn't seem to provide
any real benefit: Both irq_entries_start and common_interrupt getting
cache line aligned, eliminating the 30th set would just produce 32
bytes of padding between the 29th and common_interrupt.[ tglx: Folded lguest fix from Dan Carpenter ]
Signed-off-by: Jan Beulich
Cc: Dan Carpenter
Cc: Andi Kleen
Cc: lguest@lists.ozlabs.org
Cc: Rusty Russell
Link: http://lkml.kernel.org/r/54574D5F0200007800044389@mail.emea.novell.com
Link: http://lkml.kernel.org/r/20141115185718.GB6530@mwanda
Signed-off-by: Thomas Gleixner -
While f3761db164 ("x86, irq: Fix build error caused by
9eabc99a635a77cbf09") addressed the original build problem,
declaration, inline stub, and definition still seem misplaced: It isn't
really IO-APIC related, and it's being used solely in arch/x86/pci/.
This also means stubbing it out when !CONFIG_X86_IO_APIC was at least
questionable.Signed-off-by: Jan Beulich
Cc: Jiang Liu
Link: http://lkml.kernel.org/r/545747BE020000780004436E@mail.emea.novell.com
Signed-off-by: Thomas Gleixner -
Fix building warning when CONFIG_X86_LOCAL_APIC is disabled.
arch/x86/kernel/acpi/boot.c:699:20: warning: ‘acpi_set_irq_model_ioapic’ defined but not used [-Wunused-function]Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Cc: Len Brown
Cc: Pavel Machek
Link: http://lkml.kernel.org/r/1414397531-28254-3-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner -
Define an empty send_cleanup_vector() for UP kernel to fix link error
of undefined reference, which is used by uv_irq and irq_remapping.[ tglx: Made it an inline stub and moved it ahead of the file split
changes ]Signed-off-by: Jiang Liu
Cc: Konrad Rzeszutek Wilk
Cc: Tony Luck
Cc: Joerg Roedel
Cc: Greg Kroah-Hartman
Cc: Benjamin Herrenschmidt
Cc: Rafael J. Wysocki
Cc: Bjorn Helgaas
Cc: Randy Dunlap
Cc: Yinghai Lu
Cc: Borislav Petkov
Link: http://lkml.kernel.org/r/1414397531-28254-21-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner
