linux.git/arch/x86/include/asm/fixmap.h, branch v3.11

ix86: Don't waste fixmap entries

2013-05-31T11:08:18+00:00

The vsyscall related pvclock entries can only ever be used on
x86-64, and hence they shouldn't even get allocated for 32-bit
kernels (the more that it is there where address space is
relatively precious).

Signed-off-by: Jan Beulich 
Cc: Marcelo Tosatti 
Link: http://lkml.kernel.org/r/51A60F1F02000078000D997C@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar

Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-04-30T15:40:35+00:00

Pull x86 mm changes from Ingo Molnar:
 "Misc smaller changes all over the map"

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/iommu/dmar: Remove warning for HPET scope type
  x86/mm/gart: Drop unnecessary check
  x86/mm/hotplug: Put kernel_physical_mapping_remove() declaration in CONFIG_MEMORY_HOTREMOVE
  x86/mm/fixmap: Remove unused FIX_CYCLONE_TIMER
  x86/mm/numa: Simplify some bit mangling
  x86/mm: Re-enable DEBUG_TLBFLUSH for X86_32
  x86/mm/cpa: Cleanup split_large_page() and its callee
  x86: Drop always empty .text..page_aligned section

x86/mm/fixmap: Remove unused FIX_CYCLONE_TIMER

2013-04-12T05:21:18+00:00

The last users of FIX_CYCLONE_TIMER were removed in v2.6.18. We
can remove this unneeded constant.

Signed-off-by: Paul Bolle 
Link: http://lkml.kernel.org/r/1365698982.1427.3.camel@x61.thuisdomein
Signed-off-by: Ingo Molnar

x86: Use a read-only IDT alias on all CPUs

2013-04-11T20:53:19+00:00

Make a copy of the IDT (as seen via the "sidt" instruction) read-only.
This primarily removes the IDT from being a target for arbitrary memory
write attacks, and has the added benefit of also not leaking the kernel
base offset, if it has been relocated.

We already did this on vendor == Intel and family == 5 because of the
F0 0F bug -- regardless of if a particular CPU had the F0 0F bug or
not.  Since the workaround was so cheap, there simply was no reason to
be very specific.  This patch extends the readonly alias to all CPUs,
but does not activate the #PF to #UD conversion code needed to deliver
the proper exception in the F0 0F case except on Intel family 5
processors.

Signed-off-by: Kees Cook 
Link: http://lkml.kernel.org/r/20130410192422.GA17344@www.outflux.net
Cc: Eric Northup 
Signed-off-by: H. Peter Anvin

x86: pvclock: generic pvclock vsyscall initialization

2012-11-28T01:29:09+00:00

Originally from Jeremy Fitzhardinge.

Introduce generic, non hypervisor specific, pvclock initialization
routines.

Signed-off-by: Marcelo Tosatti

x86/intel config: Revamp configuration to allow for Moorestown and Medfield

2011-12-18T08:17:02+00:00

This sets all up the other bits that need to be INTEL_MID
specific rather than Moorestown specific.

Signed-off-by: Alan Cox 
Link: http://lkml.kernel.org/r/20111217174318.7207.91543.stgit@bob.linux.org.uk
Signed-off-by: Ingo Molnar

x86-64: Give vvars their own page

2011-06-05T19:30:32+00:00

Move vvars out of the vsyscall page into their own page and mark
it NX.

Without this patch, an attacker who can force a daemon to call
some fixed address could wait until the time contains, say,
0xCD80, and then execute the current time.

Signed-off-by: Andy Lutomirski 
Cc: Jesper Juhl 
Cc: Borislav Petkov 
Cc: Linus Torvalds 
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/b1460f81dc4463d66ea3f2b5ce240f58d48effec.1307292171.git.luto@mit.edu
Signed-off-by: Ingo Molnar

x86: Fix Moorestown VRTC fixmap placement

2011-01-11T11:46:16+00:00

The x86 fixmaps need to be all together... unfortunately the
VRTC one was misplaced.

This patch makes sure the MRST VRTC fixmap is put prior to the
__end_of_permanent_fixed_addresses marker.

Signed-off-by: Arjan van de Ven 
Signed-off-by: Alan Cox 
LKML-Reference: <20110111105544.24448.27607.stgit@bob.linux.org.uk>
Signed-off-by: Ingo Molnar

Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2011-01-06T19:06:31+00:00

* '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

arch/x86/include/asm/fixmap.h: mark __set_fixmap_offset as __always_inline

2010-11-24T21:50:49+00:00

When compiling arch/x86/kernel/early_printk_mrst.c with i386
allmodconfig, gcc-4.1.0 generates an out-of-line copy of
__set_fixmap_offset() which contains a reference to
__this_fixmap_does_not_exist which the compiler cannot elide.

Marking __set_fixmap_offset() as __always_inline prevents this.

Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: Feng Tang 
Acked-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds