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| author |   Sheng Yang <sheng@linux.intel.com> | 2009-04-30 10:58:42 +0800 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2009-09-10 08:32:43 +0300 |
| commit | 968a6347936f9421b5bc5358b579e811c52726bc (patch) | |
| tree | 0067fd4925db6763c701d9534e54b4b61be1712d /include/linux/kvm_host.h | |
| parent | KVM: SVM: use explicit 64bit storage for sysenter values (diff) | |
| download | linux-dev-968a6347936f9421b5bc5358b579e811c52726bc.tar.xz linux-dev-968a6347936f9421b5bc5358b579e811c52726bc.zip | |
KVM: No disable_irq for MSI/MSI-X interrupt on device assignment
Disable interrupt at interrupt handler and enable it when guest ack is for
the level triggered interrupt, to prevent reinjected interrupt. MSI/MSI-X don't
need it.
One possible problem is multiply same vector interrupt injected between irq
handler and scheduled work handler would be merged as one for MSI/MSI-X.
But AFAIK, the drivers handle it well.
The patch fixed the oplin card performance issue(MSI-X performance is half of
MSI/INTx).
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
0 files changed, 0 insertions, 0 deletions