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msix: Perform interrupt enabling/disabling

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In order to factorize one step further, we let MsixConfig perform the
interrupt enabling/disabling. This is done by registering/unregistering
the KVM irq_fds of all GSI routes related to this device.

And now that MsixConfig is in charge of the irq_fds, vfio-pci must rely
on it to retrieve them and provide them to the vfio driver.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2020-01-09 23:40:04 +01:00
committed by Samuel Ortiz
parent 19aeac40c9
commit 1e5e02801f
2 changed files with 21 additions and 8 deletions
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12
pci/src/msix.rs
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@@ -113,6 +113,12 @@ impl MsixConfig {
let mut gsi_msi_routes = self.gsi_msi_routes.lock().unwrap();
if self.enabled && !self.masked {
for (idx, table_entry) in self.table_entries.iter().enumerate() {
if !old_enabled || old_masked {
if let Err(e) = self.irq_routes[idx].enable(&self.vm_fd) {
error!("Failed enabling irq_fd: {:?}", e);
}
}
// Ignore MSI-X vector if masked.
if table_entry.masked() {
continue;
@@ -134,6 +140,12 @@ impl MsixConfig {
}
} else {
for route in self.irq_routes.iter() {
if old_enabled || !old_masked {
if let Err(e) = route.disable(&self.vm_fd) {
error!("Failed disabling irq_fd: {:?}", e);
}
}
gsi_msi_routes.remove(&route.gsi);
}
}