[GIT PULL] Xen core updates

Jeremy Fitzhardinge
2009-05-08T00:14:27Z

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