linux

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Marcelo Tosatti bed1d1dfc4 KVM: MMU: prepopulate guest pages after write-protecting

Zdenek reported a bug where a looping "dmsetup status" eventually hangs
on SMP guests.

The problem is that kvm_mmu_get_page() prepopulates the shadow MMU
before write protecting the guest page tables. By doing so, it leaves a
window open where the guest can mark a pte as present while the host has
shadow cached such pte as "notrap". Accesses to such address will fault
in the guest without the host having a chance to fix the situation.

Fix by moving the write protection before the pte prefetch.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

2008-04-27 12:00:58 +03:00

alpha

alpha: unbreak OSF/1 (a.out) binaries

2008-04-24 08:35:47 -07:00

arm

Merge branch 'irq-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6

2008-04-24 08:42:21 -07:00

avr32

avr32: Add hardware power-down function call

2008-04-19 20:40:11 -04:00

blackfin

[Blackfin] arch: add include/boot .gitignore files