linux-kernel - [GIT PULL] Xen core updates

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Date:	Thu,  7 May 2009 13:24:54 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>
Subject: [GIT PULL] Xen core updates

Hi Ingo,

Here's a set of core Xen updates, which is a superset of the bugfix
patches I posted earlier.

The additional patches are:

xen/i386: make sure initial VGA/ISA mappings are not overridden

  Make sure that ISA identity mappings are not overridden by _PAGE_IOMAP
  mappings.

x86: use flush_tlb_others to implement flush_tlb_all

  Paravirtualize flush_tlb_all by implementing it in terms of
  flush_tlb_others.  This avoids some unnecessary IPIs when flushing
  kernel mappings.

xen: cache cr0 value to avoid trap'n'emulate for read_cr0

  read_cr0 is used every context switch to set TS, but Xen has been
  implementing it with a trap'n'emulate of a native "mov cr0".  This
  adds a Xen-specific implementation of the read_cr0 pvop to avoid
  the extra trap.


The following changes since commit e7c064889606aab3569669078c69b87b2c527e72:
  Jeremy Fitzhardinge (1):
        xen: add FIX_TEXT_POKE to fixmap

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git xen-tip/core

Jeremy Fitzhardinge (8):
      xen/x86-64: fix breakpoints and hardware watchpoints
      xen/x86-64: clean up warnings about IST-using traps
      xen: cache cr0 value to avoid trap'n'emulate for read_cr0
      xen: deal with NMI's use of IST too
      xen/i386: make sure initial VGA/ISA mappings are not overridden
      x86: use flush_tlb_others to implement flush_tlb_all
      xen/i386: reserve Xen pagetables
      xen: reserve Xen start_info rather than e820 reserving

 arch/x86/include/asm/traps.h |    2 +
 arch/x86/kernel/entry_64.S   |    4 +++
 arch/x86/mm/tlb.c            |   29 ++++++++++++++--------
 arch/x86/xen/enlighten.c     |   54 ++++++++++++++++++++++++++++++++++++++++-
 arch/x86/xen/mmu.c           |   23 ++++++++++++++++-
 arch/x86/xen/setup.c         |    6 ++--
 6 files changed, 100 insertions(+), 18 deletions(-)

Thanks,
	J
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