1. 24 3月, 2011 2 次提交
  2. 23 3月, 2011 2 次提交
    • D
      x86: allow CONFIG_ISA_DMA_API to be disabled · 1c00f016
      David Rientjes 提交于
      Not all 64-bit systems require ISA-style DMA, so allow it to be
      configurable.  x86 utilizes the generic ISA DMA allocator from
      kernel/dma.c, so require it only when CONFIG_ISA_DMA_API is enabled.
      
      Disabling CONFIG_ISA_DMA_API is dependent on x86_64 since those machines
      do not have ISA slots and benefit the most from disabling the option (and
      on CONFIG_EXPERT as required by H.  Peter Anvin).
      
      When disabled, this also avoids declaring claim_dma_lock(),
      release_dma_lock(), request_dma(), and free_dma() since those interfaces
      will no longer be provided.
      Signed-off-by: NDavid Rientjes <rientjes@google.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      1c00f016
    • D
      x86: only compile floppy driver if CONFIG_ISA_DMA_API is enabled · 8df3bd9e
      David Rientjes 提交于
      The generic floppy disk driver utilizies the interface provided by
      CONFIG_ISA_DMA_API, specifically claim_dma_lock(), release_dma_lock(),
      request_dma(), and free_dma().  Thus, there's a strict dependency on the
      config option and the driver should only be loaded if the kernel supports
      ISA-style DMA.
      Signed-off-by: NDavid Rientjes <rientjes@google.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      8df3bd9e
  3. 12 3月, 2011 2 次提交
  4. 09 3月, 2011 1 次提交
  5. 08 3月, 2011 1 次提交
  6. 24 2月, 2011 1 次提交
    • S
      x86: Add device tree support · da6b737b
      Sebastian Andrzej Siewior 提交于
      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: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Signed-off-by: NDirk Brandewie <dirk.brandewie@gmail.com>
      Acked-by: NGrant Likely <grant.likely@secretlab.ca>
      Cc: sodaville@linutronix.de
      Cc: devicetree-discuss@lists.ozlabs.org
      LKML-Reference: <1298405266-1624-3-git-send-email-bigeasy@linutronix.de>
      Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
      da6b737b
  7. 23 2月, 2011 5 次提交
  8. 18 2月, 2011 1 次提交
    • H
      x86, trampoline: Common infrastructure for low memory trampolines · 4822b7fc
      H. Peter Anvin 提交于
      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: NH. Peter Anvin <hpa@linux.intel.com>
      LKML-Reference: <4D5DFBE4.7090104@intel.com>
      Cc: Rafael J. Wysocki <rjw@sisk.pl>
      Cc: Matthieu Castet <castet.matthieu@free.fr>
      Cc: Stephen Rothwell <sfr@canb.auug.org.au>
      4822b7fc
  9. 28 1月, 2011 1 次提交
    • T
      x86: Unify CPU -> NUMA node mapping between 32 and 64bit · 645a7919
      Tejun Heo 提交于
      Unlike 64bit, 32bit has been using its own cpu_to_node_map[] for
      CPU -> NUMA node mapping.  Replace it with early_percpu variable
      x86_cpu_to_node_map and share the mapping code with 64bit.
      
      * USE_PERCPU_NUMA_NODE_ID is now enabled for 32bit too.
      
      * x86_cpu_to_node_map and numa_set/clear_node() are moved from
        numa_64 to numa.  For now, on 32bit, x86_cpu_to_node_map is initialized
        with 0 instead of NUMA_NO_NODE.  This is to avoid introducing unexpected
        behavior change and will be updated once init path is unified.
      
      * srat_detect_node() is now enabled for x86_32 too.  It calls
        numa_set_node() and initializes the mapping making explicit
        cpu_to_node_map[] updates from map/unmap_cpu_to_node() unnecessary.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Cc: eric.dumazet@gmail.com
      Cc: yinghai@kernel.org
      Cc: brgerst@gmail.com
      Cc: gorcunov@gmail.com
      Cc: penberg@kernel.org
      Cc: shaohui.zheng@intel.com
      Cc: rientjes@google.com
      LKML-Reference: <1295789862-25482-15-git-send-email-tj@kernel.org>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      Cc: David Rientjes <rientjes@google.com>
      645a7919
  10. 21 1月, 2011 1 次提交
    • D
      kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT · 6a108a14
      David Rientjes 提交于
      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: NIngo Molnar <mingo@elte.hu>
      Acked-by: NDavid Woodhouse <david.woodhouse@intel.com>
      Signed-off-by: NDavid Rientjes <rientjes@google.com>
      Cc: Greg KH <gregkh@suse.de>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jens Axboe <axboe@kernel.dk>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Robin Holt <holt@sgi.com>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6a108a14
  11. 15 1月, 2011 2 次提交
  12. 14 1月, 2011 3 次提交
    • A
      x86: OLPC: convert olpc-xo1 driver from pci device to platform device · 419cdc54
      Andres Salomon 提交于
      The cs5535-mfd driver now takes care of the PCI BAR handling; this
      means the olpc-xo1 driver shouldn't be touching the PCI device at all.
      
      This patch uses both cs5535-acpi and cs5535-pms platform devices rather
      than a single platform device because the cs5535-mfd driver may be used
      by other CS5535 platform-specific drivers; OLPC doesn't get to dictate
      that ACPI and PMS will always be used together.
      Signed-off-by: NAndres Salomon <dilinger@queued.net>
      Acked-by: NH. Peter Anvin <hpa@zytor.com>
      Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
      419cdc54
    • L
      x86: support XZ-compressed kernel · 30314804
      Lasse Collin 提交于
      This integrates the XZ decompression code to the x86 pre-boot code.
      
      mkpiggy.c is updated to reserve about 32 KiB more buffer safety margin for
      kernel decompression.  It is done unconditionally for all decompressors to
      keep the code simpler.
      
      The XZ decompressor needs around 30 KiB of heap, so the heap size is
      increased to 32 KiB on both x86-32 and x86-64.
      
      Documentation/x86/boot.txt is updated to list the XZ magic number.
      
      With the x86 BCJ filter in XZ, XZ-compressed x86 kernel tends to be a few
      percent smaller than the equivalent LZMA-compressed kernel.
      Signed-off-by: NLasse Collin <lasse.collin@tukaani.org>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Alain Knaff <alain@knaff.lu>
      Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
      Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      30314804
    • A
      kernel: clean up USE_GENERIC_SMP_HELPERS · 351f8f8e
      Amerigo Wang 提交于
      For arch which needs USE_GENERIC_SMP_HELPERS, it has to select
      USE_GENERIC_SMP_HELPERS, rather than leaving a choice to user, since they
      don't provide their own implementions.
      
      Also, move on_each_cpu() to kernel/smp.c, it is strange to put it in
      kernel/softirq.c.
      
      For arch which doesn't use USE_GENERIC_SMP_HELPERS, e.g.  blackfin, only
      on_each_cpu() is compiled.
      Signed-off-by: NAmerigo Wang <amwang@redhat.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Randy Dunlap <randy.dunlap@oracle.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      351f8f8e
  13. 16 12月, 2010 1 次提交
    • A
      x86, olpc: Add OLPC device-tree support · c10d1e26
      Andres Salomon 提交于
      Make use of PROC_DEVICETREE to export the tree, and sparc's PROMTREE code to
      call into OLPC's Open Firmware to build the tree.
      
      v5: fix buglet with root node check (introduced in v4)
      
      v4: address some minor style issues pointed out by Grant, and explicitly cast
          negative phandle checks to s32.
      
      v3: rename olpc_prom to olpc_dt
        - rework Kconfig entries
        - drop devtree build hook from proc, instead adding a call to x86's
          paging_init (similarly to how sparc64 does it)
        - switch allocation from using slab to alloc_bootmem.  this allows
          the DT to be built earlier during boot (during setup_arch); the
          downside is that there are some 1200 bootmem reservations that are
          done during boot.  Not ideal..
        - add a helper olpc_ofw_is_installed function to test for the
          existence and successful detection of OLPC's OFW.
      Signed-off-by: NAndres Salomon <dilinger@queued.net>
      LKML-Reference: <20101116220952.26526a80@queued.net>
      Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
      c10d1e26
  14. 26 11月, 2010 1 次提交
  15. 18 11月, 2010 2 次提交
  16. 17 11月, 2010 2 次提交
  17. 12 11月, 2010 2 次提交
  18. 09 11月, 2010 1 次提交
    • F
      x86/mrst: Add SFI platform device parsing code · 1da4b1c6
      Feng Tang 提交于
      SFI provides a series of tables. These describe the platform devices present
      including SPI and I²C devices, as well as various sensors, keypads and other
      glue as well as interfaces provided via the SCU IPC mechanism (intel_scu_ipc.c)
      
      This patch is a merge of the core elements and relevant fixes from the
      Intel development code by Feng, Alek, myself into a single coherent patch
      for upstream submission.
      
      It provides the needed infrastructure to register I2C, SPI and platform devices
      described by the tables, as well as handlers for some of the hardware already
      supported in kernel. The 0.8 firmware also provides GPIO tables.
      
      Devices are created at boot time or if they are SCU dependant at the point an
      SCU is discovered. The existing Linux device mechanisms will then handle the
      device binding. At an abstract level this is an SFI to Linux device translator.
      
      Device/platform specific setup/glue is in this file. This is done so that the
      drivers for the generic I²C and SPI bus devices remain cross platform as they
      should.
      
      (Updated from RFC version to correct the emc1403 name used by the firmware
       and a wrongly used #define)
      Signed-off-by: NAlek Du <alek.du@linux.intel.com>
      LKML-Reference: <20101109112158.20013.6158.stgit@localhost.localdomain>
      [Clean ups, removal of 0.7 support]
      Signed-off-by: NFeng Tang <feng.tang@linux.intel.com>
      [Clean ups]
      Signed-off-by: NAlan Cox <alan@linux.intel.com>
      Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
      1da4b1c6
  19. 21 10月, 2010 1 次提交
  20. 19 10月, 2010 2 次提交
  21. 18 10月, 2010 1 次提交
  22. 16 10月, 2010 1 次提交
  23. 15 10月, 2010 3 次提交
    • R
      x86, olpc: XO-1 uses/depends on PCI · 9e9006e9
      Randy Dunlap 提交于
      olpc-xo1 uses pci_*() interfaces so it should depend on PCI.
      
      Otherwise we get build failure like:
      
       arch/x86/kernel/olpc-xo1.c:65: error: implicit declaration of function 'pci_enable_device_io'
       arch/x86/kernel/olpc-xo1.c:71: error: implicit declaration of function 'pci_request_region'
       arch/x86/kernel/olpc-xo1.c:80: error: implicit declaration of function 'pci_release_region'
      Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
      Acked-by: NDaniel Drake <dsd@laptop.org>
      Cc: Stephen Rothwell <sfr@canb.auug.org.au>
      LKML-Reference: <20101014101313.adf7eb2a.randy.dunlap@oracle.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      9e9006e9
    • S
      ftrace: Rename config option HAVE_C_MCOUNT_RECORD to HAVE_C_RECORDMCOUNT · cf4db259
      Steven Rostedt 提交于
      The config option used by archs to let the build system know that
      the C version of the recordmcount works for said arch is currently
      called HAVE_C_MCOUNT_RECORD which enables BUILD_C_RECORDMCOUNT. To
      be more consistent with the name that all archs may use, it has been
      renamed to HAVE_C_RECORDMCOUNT. This will be less confusing since
      we are building a C recordmcount and not a mcount_record.
      Suggested-by: NIngo Molnar <mingo@elte.hu>
      Cc: <linux-arch@vger.kernel.org>
      Cc: Michal Marek <mmarek@suse.cz>
      Cc: linux-kbuild@vger.kernel.org
      Cc: John Reiser <jreiser@bitwagon.com>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      cf4db259
    • S
      ftrace/x86: Add support for C version of recordmcount · 72441cb1
      Steven Rostedt 提交于
      This patch adds the support for the C version of recordmcount and
      compile times show ~ 12% improvement.
      
      After verifying this works, other archs can add:
      
       HAVE_C_MCOUNT_RECORD
      
      in its Kconfig and it will use the C version of recordmcount
      instead of the perl version.
      
      Cc: <linux-arch@vger.kernel.org>
      Cc: Michal Marek <mmarek@suse.cz>
      Cc: linux-kbuild@vger.kernel.org
      Cc: John Reiser <jreiser@bitwagon.com>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      72441cb1
  24. 14 10月, 2010 1 次提交