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  1. 09 7月, 2008 34 次提交
  3. 08 7月, 2008 6 次提交
    • B
      x86: use FIRMWARE_MEMMAP on x86/E820 · 5dfcf14d
      由 Bernhard Walle 提交于 
      This patch uses the /sys/firmware/memmap interface provided in the last patch
on the x86 architecture when E820 is used. The patch copies the E820
memory map very early, and registers the E820 map afterwards via
firmware_map_add_early().
Signed-off-by: NBernhard Walle <bwalle@suse.de>
Acked-by: NGreg KH <gregkh@suse.de>
Acked-by: NVivek Goyal <vgoyal@redhat.com>
Cc: kexec@lists.infradead.org
Cc: yhlu.kernel@gmail.com
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      5dfcf14d
    • B
      sysfs: add /sys/firmware/memmap · 69ac9cd6
      由 Bernhard Walle 提交于 
      This patch adds /sys/firmware/memmap interface that represents the BIOS
(or Firmware) provided memory map. The tree looks like:

    /sys/firmware/memmap/0/start   (hex number)
                           end     (hex number)
                           type    (string)
    ...                 /1/start
                           end
                           type

With the following shell snippet one can print the memory map in the same form
the kernel prints itself when booting on x86 (the E820 map).

  --------- 8< --------------------------
    #!/bin/sh
    cd /sys/firmware/memmap
    for dir in * ; do
        start=$(cat $dir/start)
        end=$(cat $dir/end)
        type=$(cat $dir/type)
        printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type"
    done
  --------- >8 --------------------------

That patch only provides the needed interface:

 1. The sysfs interface.
 2. The structure and enumeration definition.
 3. The function firmware_map_add() and firmware_map_add_early()
    that should be called from architecture code (E820/EFI, for
    example) to add the contents to the interface.

If the kernel is compiled without CONFIG_FIRMWARE_MEMMAP, the interface does
nothing without cluttering the architecture-specific code with #ifdef's.

The purpose of the new interface is kexec: While /proc/iomem represents
the *used* memory map (e.g. modified via kernel parameters like 'memmap'
and 'mem'), the /sys/firmware/memmap tree represents the unmodified memory
map provided via the firmware. So kexec can:

 - use the original memory map for rebooting,
 - use the /proc/iomem for setting up the ELF core headers for kdump
   case that should only represent the memory of the system.

The patch has been tested on i386 and x86_64.
Signed-off-by: NBernhard Walle <bwalle@suse.de>
Acked-by: NGreg KH <gregkh@suse.de>
Acked-by: NVivek Goyal <vgoyal@redhat.com>
Cc: kexec@lists.infradead.org
Cc: yhlu.kernel@gmail.com
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      69ac9cd6
    • Y
      x86: remove acpi_srat config v2 · 6247943d
      由 Yinghai Lu 提交于 
      use ACPI_NUMA directly

and move srat_32.c to mm/
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      6247943d
    • Y
      x86: remove have_arch_parse_srat -v2 · 698839fe
      由 Yinghai Lu 提交于 
      we already have the same srat handling interface for 32bit.
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      698839fe
    • I
      printk: export console_drivers · a29d1cfe
      由 Ingo Molnar 提交于 
      this symbol is needed by drivers/video/xen-fbfront.ko.

[ cherry-picked from tip/core/printk ]
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      a29d1cfe
    • J
      x86/cpa: use an undefined PTE bit for testing CPA · 5a654ba7
      由 Jeremy Fitzhardinge 提交于 
      Rather than using _PAGE_GLOBAL - which not all CPUs support - to test
CPA, use one of the reserved-for-software-use PTE flags instead.  This
allows CPA testing to work on CPUs which don't support PGD.
Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      5a654ba7