tree 9c0cc39f4088a9b54a96ab6545739e423deb3d2e
parent 5689cc53fa9d09b5bf41b1b1a7c90bd6c112ab40
author Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> 1278144162 +0800
committer Avi Kivity <avi@redhat.com> 1280720416 +0300

KVM: VMX: fix tlb flush with invalid root

Commit 341d9b535b6c simplify reload logic while entry guest mode, it
can avoid unnecessary sync-root if KVM_REQ_MMU_RELOAD and
KVM_REQ_MMU_SYNC both set.

But, it cause a issue that when we handle 'KVM_REQ_TLB_FLUSH', the
root is invalid, it is triggered during my test:

Kernel BUG at ffffffffa00212b8 [verbose debug info unavailable]
......

Fixed by directly return if the root is not ready.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>