diff options
| author | Gleb Natapov <gleb@redhat.com> | 2010-10-14 11:22:50 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-12-26 09:58:12 +0200 |
| commit | 8d4fa0303d4532d9e1372ef1437db0b70a0932fc (patch) | |
| tree | dd5cc2c1cc3c7890e52a093f2cac303293b0f276 /virt | |
| parent | c9373c8ef18d3e49442b3b725ad005a06a035823 (diff) | |
KVM: Add PV MSR to enable asynchronous page faults delivery.
Guest enables async PF vcpu functionality using this MSR.
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/async_pf.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c index e97eae965a4c..1f59498561b2 100644 --- a/virt/kvm/async_pf.c +++ b/virt/kvm/async_pf.c @@ -190,3 +190,23 @@ retry_sync: kmem_cache_free(async_pf_cache, work); return 0; } + +int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu) +{ + struct kvm_async_pf *work; + + if (!list_empty(&vcpu->async_pf.done)) + return 0; + + work = kmem_cache_zalloc(async_pf_cache, GFP_ATOMIC); + if (!work) + return -ENOMEM; + + work->page = bad_page; + get_page(bad_page); + INIT_LIST_HEAD(&work->queue); /* for list_del to work */ + + list_add_tail(&work->link, &vcpu->async_pf.done); + vcpu->async_pf.queued++; + return 0; +} |