05 Dec, 2011
1 commit
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The previous patch modified the stop cpus path to use NMI
instead of IRQ as the way to communicate to the other cpus to
shutdown. There were some concerns that various machines may
have problems with using an NMI IPI.This patch creates a selftest to check if NMI is working at
boot. The idea is to help catch any issues before the machine
panics and we learn the hard way.Loosely based on the locking-selftest.c file, this separate file
runs a couple of simple tests and reports the results. The
output looks like:...
Brought up 4 CPUs
----------------
| NMI testsuite:
--------------------
remote IPI: ok |
local IPI: ok |
--------------------
Good, all 2 testcases passed! |
---------------------------------
Total of 4 processors activated (21330.61 BogoMIPS).
...Signed-off-by: Don Zickus
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Robert Richter
Cc: seiji.aguchi@hds.com
Cc: vgoyal@redhat.com
Cc: mjg@redhat.com
Cc: tony.luck@intel.com
Cc: gong.chen@intel.com
Cc: satoru.moriya@hds.com
Cc: avi@redhat.com
Cc: Andi Kleen
Link: http://lkml.kernel.org/r/1318533267-18880-3-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar
10 Oct, 2011
1 commit
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The nmi stuff is changing a lot and adding more functionality. Split it
out from the traps.c file so it doesn't continue to pollute that file.This makes it easier to find and expand all the future nmi related work.
No real functional changes here.
Signed-off-by: Don Zickus
Signed-off-by: Peter Zijlstra
Link: http://lkml.kernel.org/r/1317409584-23662-2-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar
13 Aug, 2011
1 commit
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* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-tip:
x86-64: Rework vsyscall emulation and add vsyscall= parameter
x86-64: Wire up getcpu syscall
x86: Remove unnecessary compile flag tweaks for vsyscall code
x86-64: Add vsyscall:emulate_vsyscall trace event
x86-64: Add user_64bit_mode paravirt op
x86-64, xen: Enable the vvar mapping
x86-64: Work around gold bug 13023
x86-64: Move the "user" vsyscall segment out of the data segment.
x86-64: Pad vDSO to a page boundary
11 Aug, 2011
1 commit
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As of commit 98d0ac38ca7b1b7a552c9a2359174ff84decb600
Author: Andy Lutomirski
Date: Thu Jul 14 06:47:22 2011 -0400x86-64: Move vread_tsc and vread_hpet into the vDSO
user code no longer directly calls into code in arch/x86/kernel/, so
we don't need compile flag hacks to make it safe. All vdso code is
in the vdso directory now.Signed-off-by: Andy Lutomirski
Link: http://lkml.kernel.org/r/835cd05a4c7740544d09723d6ba48f4406f9826c.1312988155.git.luto@mit.edu
Signed-off-by: H. Peter Anvin
23 Jul, 2011
1 commit
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* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86-64, vdso: Do not allocate memory for the vDSO
clocksource: Change __ARCH_HAS_CLOCKSOURCE_DATA to a CONFIG option
x86, vdso: Drop now wrong comment
Document the vDSO and add a reference parser
ia64: Replace clocksource.fsys_mmio with generic arch data
x86-64: Move vread_tsc and vread_hpet into the vDSO
clocksource: Replace vread with generic arch data
x86-64: Add --no-undefined to vDSO build
x86-64: Allow alternative patching in the vDSO
x86: Make alternative instruction pointers relative
x86-64: Improve vsyscall emulation CS and RIP handling
x86-64: Emulate legacy vsyscalls
x86-64: Fill unused parts of the vsyscall page with 0xcc
x86-64: Remove vsyscall number 3 (venosys)
x86-64: Map the HPET NX
x86-64: Remove kernel.vsyscall64 sysctl
x86-64: Give vvars their own page
x86-64: Document some of entry_64.S
x86-64: Fix alignment of jiffies variable
15 Jul, 2011
1 commit
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The vsyscall page now consists entirely of trap instructions.
Cc: John Stultz
Signed-off-by: Andy Lutomirski
Link: http://lkml.kernel.org/r/637648f303f2ef93af93bae25186e9a1bea093f5.1310639973.git.luto@mit.edu
Signed-off-by: H. Peter Anvin
21 Jun, 2011
2 commits
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A few parts of the driver were missing in drivers/iommu.
Move them there to have the complete driver in that
directory.Signed-off-by: Joerg Roedel
-
This should ease finding similarities with different platforms,
with the intention of solving problems once in a generic framework
which everyone can use.Compile-tested on x86_64.
Signed-off-by: Ohad Ben-Cohen
Signed-off-by: Joerg Roedel
07 Jun, 2011
1 commit
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There's a fair amount of code in the vsyscall page. It contains
a syscall instruction (in the gettimeofday fallback) and who
knows what will happen if an exploit jumps into the middle of
some other code.Reduce the risk by replacing the vsyscalls with short magic
incantations that cause the kernel to emulate the real
vsyscalls. These incantations are useless if entered in the
middle.This causes vsyscalls to be a little more expensive than real
syscalls. Fortunately sensible programs don't use them.
The only exception is time() which is still called by glibc
through the vsyscall - but calling time() millions of times
per second is not sensible. glibc has this fixed in the
development tree.This patch is not perfect: the vread_tsc and vread_hpet
functions are still at a fixed address. Fixing that might
involve making alternative patching work in the vDSO.Signed-off-by: Andy Lutomirski
Acked-by: Linus Torvalds
Cc: Jesper Juhl
Cc: Borislav Petkov
Cc: Arjan van de Ven
Cc: Jan Beulich
Cc: richard -rw- weinberger
Cc: Mikael Pettersson
Cc: Andi Kleen
Cc: Brian Gerst
Cc: Louis Rilling
Cc: Valdis.Kletnieks@vt.edu
Cc: pageexec@freemail.hu
Link: http://lkml.kernel.org/r/e64e1b3c64858820d12c48fa739efbd1485e79d5.1307292171.git.luto@mit.edu
[ Removed the CONFIG option - it's simpler to just do it unconditionally. Tidied up the code as well. ]
Signed-off-by: Ingo Molnar
28 May, 2011
1 commit
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The commit 44259b1abfaa8bb819d25d41d71e8e33e25dd36a
Author: Andy Lutomirski
x86-64: Move vread_tsc into a new file with sensible optionsRemoved the -pg from tsc.o which caused the function graph tracer
to go into an infinite function call recursion as it uses the tsc
internally outside its recursion protection, thus tracing the tsc
breaks the function graph tracer.This commit also added the file vread_tsc_64.c that gets used
by vdso but failed to prevent GCOV from monkeying with it,
causing userspace to try to access kernel data when GCOV was
enabled.Thanks to Thomas Gleixner for pointing out GCOV as the likely
culprit that added strange kernel accesses into the vread_tsc()
call.Cc: Author: Andy Lutomirski
Cc: Thomas Gleixner
Signed-off-by: Steven Rostedt
24 May, 2011
1 commit
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vread_tsc is short and hot, and it's userspace code so the usual
reasons to enable -pg and turn off sibling calls don't apply.(OK, turning off sibling calls has no effect. But it might
someday...)As an added benefit, tsc.c is profilable now.
Signed-off-by: Andy Lutomirski
Cc: Andi Kleen
Cc: Linus Torvalds
Cc: "David S. Miller"
Cc: Eric Dumazet
Cc: Peter Zijlstra
Cc: Borislav Petkov
Link: http://lkml.kernel.org/r/%3C99c6d7f5efa3ccb65b4ac6eb443e1ab7bad47d7b.1306156808.git.luto%40mit.edu%3E
Signed-off-by: Thomas Gleixner
20 May, 2011
1 commit
-
…el/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Introduce pci_map_biosrom()
x86, olpc: Use device tree for platform identification
10 May, 2011
1 commit
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This file only contains code relevant for the northbridge
gart in AMD processors. This patch renames the file to
represent this fact in the filename.Signed-off-by: Joerg Roedel
23 Mar, 2011
1 commit
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8237A utilizes the interface provided by CONFIG_ISA_DMA_API, specifically
claim_dma_lock() and release_dma_lock(). Thus, there's a strict
dependency on the config option and the module should only be loaded if
the kernel supports ISA-style DMA.Signed-off-by: David Rientjes
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Cc: Thomas Gleixner
Cc: Bjorn Helgaas
Cc: Russell King
Cc: "Luck, Tony"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Mar, 2011
1 commit
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…rnel/git/tip/linux-2.6-tip
* 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Fix binutils-2.21 symbol related build failures
x86-64, trampoline: Remove unused variable
x86, reboot: Fix the use of passed arguments in 32-bit BIOS reboot
x86, reboot: Move the real-mode reboot code to an assembly file
x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly
x86, trampoline: Use the unified trampoline setup for ACPI wakeup
x86, trampoline: Common infrastructure for low memory trampolinesFix up trivial conflicts in arch/x86/kernel/Makefile
16 Mar, 2011
1 commit
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The isci driver needs to retrieve its preboot OROM image which contains
necessary runtime parameters like platform specific sas addresses and
phy configuration. There is no ROM BAR associated with this area,
instead we will need to scan legacy expansion ROM space.1/ Promote the probe_roms_32 implementation to x86-64
2/ Add a facility to find and map an adapter rom by pci device (according to
PCI Firmware Specification Revision 3.0)Signed-off-by: Dave Jiang
LKML-Reference:
Signed-off-by: Dan Williams
Signed-off-by: H. Peter Anvin
11 Mar, 2011
1 commit
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The extra tsc_sync.o goal definition is superflous.
CONFIG_X86_64_SMP depends on CONFIG_SMP
and tsc_sync.o is already in the definition of CONFIG_SMP.Signed-off-by: Henrik Kretzschmar
Acked-by: Cyrill Gorcunov
LKML-Reference:
Signed-off-by: Ingo Molnar
24 Feb, 2011
1 commit
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This patch adds minimal support for device tree on x86. The device
tree blob is passed to the kernel via setup_data which requires at
least boot protocol 2.09.Memory size, restricted memory regions, boot arguments are gathered
the traditional way so things like cmd_line are just here to let the
code compile.The current plan is use the device tree as an extension and to gather
information which can not be enumerated and would have to be hardcoded
otherwise. This includes things like
- which devices are on this I2C/SPI bus?
- how are the interrupts wired to IO APIC?
- where could my hpet be?Signed-off-by: Sebastian Andrzej Siewior
Signed-off-by: Dirk Brandewie
Acked-by: Grant Likely
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference:
Signed-off-by: Thomas Gleixner
18 Feb, 2011
2 commits
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Move the real-mode reboot code out to an assembly file (reboot_32.S)
which is allocated using the common lowmem trampoline allocator.Signed-off-by: H. Peter Anvin
LKML-Reference:
Cc: Stephen Rothwell
Cc: Rafael J. Wysocki
Cc: Matthieu Castet -
Common infrastructure for low memory trampolines. This code installs
the trampolines permanently in low memory very early. It also permits
multiple pieces of code to be used for this purpose.This code also introduces a standard infrastructure for computing
symbol addresses in the trampoline code.The only change to the actual SMP trampolines themselves is that the
64-bit trampoline has been made reusable -- the previous version would
overwrite the code with a status variable; this moves the status
variable to a separate location.Signed-off-by: H. Peter Anvin
LKML-Reference:
Cc: Rafael J. Wysocki
Cc: Matthieu Castet
Cc: Stephen Rothwell
07 Jan, 2011
1 commit
-
…el/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, earlyprintk: Move mrst early console to platform/ and fix a typo
x86, apbt: Setup affinity for apb timers acting as per-cpu timer
ce4100: Add errata fixes for UART on CE4100
x86: platform: Move iris to x86/platform where it belongs
x86, mrst: Check platform_device_register() return code
x86/platform: Add Eurobraille/Iris power off support
x86, mrst: Add explanation for using 1960 as the year offset for vrtc
x86, mrst: Fix dependencies of "select INTEL_SCU_IPC"
x86, mrst: The shutdown for MRST requires the SCU IPC mechanism
x86: Ce4100: Add reboot_fixup() for CE4100
ce4100: Add PCI register emulation for CE4100
x86: Add CE4100 platform support
x86: mrst: Set vRTC's IRQ to level trigger type
x86: mrst: Add audio driver bindings
rtc: Add drivers/rtc/rtc-mrst.c
x86: mrst: Add vrtc driver which serves as a wall clock device
x86: mrst: Add Moorestown specific reboot/shutdown support
x86: mrst: Parse SFI timer table for all timer configs
x86/mrst: Add SFI platform device parsing code
18 Dec, 2010
1 commit
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This implements arch_remove_reservations() so allocate_resource() can
avoid any arch-specific reserved areas. This currently just avoids the
BIOS area (the first 1MB), but could be used for E820 reserved areas if
that turns out to be necessary.We previously avoided this area in pcibios_align_resource(). This patch
moves the test from that PCI-specific path to a generic path, so *all*
resource allocations will avoid this area.Acked-by: H. Peter Anvin
Signed-off-by: Bjorn Helgaas
Signed-off-by: Jesse Barnes
07 Dec, 2010
1 commit
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Move the code to arch/x86/platform/mrst/. Also fix a typo to use
the correct config option: ONFIG_EARLY_PRINTK_MRSTSigned-off-by: Feng Tang
Cc: alan@linux.intel.com
LKML-Reference:
Signed-off-by: Thomas Gleixner
20 Nov, 2010
1 commit
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Signed-off-by: Thomas Gleixner
18 Nov, 2010
1 commit
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The Iris machines from Eurobraille do not have APM or ACPI support
to shut themselves down properly. A special I/O sequence is
needed to do so. This modle runs this I/O sequence at
kernel shutdown when its force parameter is set to 1.Signed-off-by: Shérab
Acked-by: "H. Peter Anvin"
[ did minor coding style edits ]
Signed-off-by: Ingo Molnar
27 Oct, 2010
7 commits
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Signed-off-by: Thomas Gleixner
Cc: Andres Salomon -
Signed-off-by: Thomas Gleixner
Cc: Mike Travis -
Signed-off-by: Thomas Gleixner
Cc: Jacob Pan
Cc: Alan Cox -
Signed-off-by: Thomas Gleixner
-
Signed-off-by: Thomas Gleixner
-
Signed-off-by: Thomas Gleixner
Cc: Huang Ying -
Signed-off-by: Thomas Gleixner
Cc: Len Brown
Cc: Alan Cox
22 Oct, 2010
6 commits
-
…git/tip/linux-2.6-tip
* 'x86-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, iommu: Update header comments with appropriate naming
ia64, iommu: Add a dummy iommu_table.h file in IA64.
x86, iommu: Fix IOMMU_INIT alignment rules
x86, doc: Adding comments about .iommu_table and its neighbors.
x86, iommu: Utilize the IOMMU_INIT macros functionality.
x86, VT-d: Make Intel VT-d IOMMU use IOMMU_INIT_* macros.
x86, GART/AMD-VI: Make AMD GART and IOMMU use IOMMU_INIT_* macros.
x86, calgary: Make Calgary IOMMU use IOMMU_INIT_* macros.
x86, xen-swiotlb: Make Xen-SWIOTLB use IOMMU_INIT_* macros.
x86, swiotlb: Make SWIOTLB use IOMMU_INIT_* macros.
x86, swiotlb: Simplify SWIOTLB pci_swiotlb_detect routine.
x86, iommu: Add proper dependency sort routine (and sanity check).
x86, iommu: Make all IOMMU's detection routines return a value.
x86, iommu: Add IOMMU_INIT macros, .iommu_table section, and iommu_table_entry structure -
…/git/tip/linux-2.6-tip
* 'x86-vmware-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, paravirt: Remove alloc_pmd_clone hook, only used by VMI
x86, vmware: Remove deprecated VMI kernel supportFix up trivial #include conflict in arch/x86/kernel/smpboot.c
-
* 'x86-olpc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, olpc: XO-1 uses/depends on PCI
x86, olpc: Register XO-1 platform devices
x86, olpc: Add XO-1 poweroff support
x86, olpc: Don't retry EC commands forever
x86, olpc: Rework BIOS signature check
x86, olpc: Only enable PCI configuration type override on XO-1 -
* 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: sfi: Make local functions static
x86, earlyprintk: Add hsu early console for Intel Medfield platform
x86, earlyprintk: Add earlyprintk for Intel Moorestown platform
x86: Add two helper macros for fixed address mapping
x86, mrst: A function in a header file needs to be marked "inline" -
…el/git/tip/linux-2.6-tip
* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Remove stale pmtimer_64.c
x86, cleanups: Use clear_page/copy_page rather than memset/memcpy
x86: Remove unnecessary #ifdef ACPI/X86_IO_ACPI
x86, cleanup: Remove obsolete boot_cpu_id variable -
…/git/tip/linux-2.6-tip
* 'x86-amd-nb-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, amd_nb: Enable GART support for AMD family 0x15 CPUs
x86, amd: Use compute unit information to determine thread siblings
x86, amd: Extract compute unit information for AMD CPUs
x86, amd: Add support for CPUID topology extension of AMD CPUs
x86, nmi: Support NMI watchdog on newer AMD CPU families
x86, mtrr: Assume SYS_CFG[Tom2ForceMemTypeWB] exists on all future AMD CPUs
x86, k8: Rename k8.[ch] to amd_nb.[ch] and CONFIG_K8_NB to CONFIG_AMD_NB
x86, k8-gart: Decouple handling of garts and northbridges
x86, cacheinfo: Fix dependency of AMD L3 CID
x86, kvm: add new AMD SVM feature bits
x86, cpu: Fix allowed CPUID bits for KVM guests
x86, cpu: Update AMD CPUID feature bits
x86, cpu: Fix renamed, not-yet-shipping AMD CPUID feature bit
x86, AMD: Remove needless CPU family check (for L3 cache info)
x86, tsc: Remove CPU frequency calibration on AMD
19 Oct, 2010
1 commit
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Provide a mechanism that allows running code in IRQ context. It is
most useful for NMI code that needs to interact with the rest of the
system -- like wakeup a task to drain buffers.Perf currently has such a mechanism, so extract that and provide it as
a generic feature, independent of perf so that others may also
benefit.The IRQ context callback is generated through self-IPIs where
possible, or on architectures like powerpc the decrementer (the
built-in timer facility) is set to generate an interrupt immediately.Architectures that don't have anything like this get to do with a
callback from the timer tick. These architectures can call
irq_work_run() at the tail of any IRQ handlers that might enqueue such
work (like the perf IRQ handler) to avoid undue latencies in
processing the work.Signed-off-by: Peter Zijlstra
Acked-by: Kyle McMartin
Acked-by: Martin Schwidefsky
[ various fixes ]
Signed-off-by: Huang Ying
LKML-Reference:
Signed-off-by: Ingo Molnar
16 Oct, 2010
1 commit
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This file is unused since the apic unification in 2.6.29, but nobody
noticed.Signed-off-by: Thomas Gleixner