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| author | Gleb Natapov <gleb@redhat.com> | 2010-10-14 11:22:50 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:23:12 +0200 |
| commit | 344d9588a9df06182684168be4f1408b55c7da3e (patch) | |
| tree | 16890e3f0f10ac767265e650a1d6d38b78780040 /virt/kvm/async_pf.c | |
| parent | ca3f10172eea9b95bbb66487656f3c3e93855702 (diff) | |
| download | linux-stable-344d9588a9df06182684168be4f1408b55c7da3e.tar.gz linux-stable-344d9588a9df06182684168be4f1408b55c7da3e.tar.bz2 linux-stable-344d9588a9df06182684168be4f1408b55c7da3e.zip | |
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/kvm/async_pf.c')
| -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; +} |