This allows us to remove write protection earlier than otherwise. Should some mad OS choose to use byte writes to update pagetables, it will suffer a performance hit, but still work correctly.
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]> --- drivers/kvm/mmu.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index e8e2281..2277b7c 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -1169,6 +1169,7 @@ void kvm_mmu_pre_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes) continue; pte_size = page->role.glevels == PT32_ROOT_LEVEL ? 4 : 8; misaligned = (offset ^ (offset + bytes - 1)) & ~(pte_size - 1); + misaligned |= bytes < 4; if (misaligned || flooded) { /* * Misaligned accesses are too much trouble to fix -- 1.5.0.6 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/