tree 4668ee0dc19571e4f05443555ec0e807692572e6
parent a18de5a403f9b5010527b2e7b05049b539b4facd
author Avi Kivity <avi@qumranet.com> 1180614215 +0300
committer Avi Kivity <avi@qumranet.com> 1184576744 +0300

KVM: Make shadow pte updates atomic

With guest smp, a second vcpu might see partial updates when the first
vcpu services a page fault.  So delay all updates until we have figured
out what the pte should look like.

Note that on i386, this is still not completely atomic as a 64-bit write
will be split into two on a 32-bit machine.

Signed-off-by: Avi Kivity <avi@qumranet.com>