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    Subject[26/36] KVM: MMU: flush remote tlbs when overwriting spte with different pfn
    2.6.34-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>

    (cherry picked from commit 91546356d0e550fa23abf7f4b04a903c2855761f)

    After remove a rmap, we should flush all vcpu's tlb

    Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
    Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    arch/x86/kvm/mmu.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/arch/x86/kvm/mmu.c
    +++ b/arch/x86/kvm/mmu.c
    @@ -1901,6 +1901,8 @@ static void mmu_set_spte(struct kvm_vcpu
    pgprintk("hfn old %lx new %lx\n",
    spte_to_pfn(*sptep), pfn);
    rmap_remove(vcpu->kvm, sptep);
    + __set_spte(sptep, shadow_trap_nonpresent_pte);
    + kvm_flush_remote_tlbs(vcpu->kvm);
    } else
    was_rmapped = 1;
    }



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