diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2018-04-05 19:41:47 +0200 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2018-07-20 08:30:48 +0800 |
| commit | 4712c158c5276fd3c401152f4bb5c3fccf185946 (patch) | |
| tree | 228699be967677c540afa6b0652d059740aa5c25 /hw/net/e1000e_core.h | |
| parent | 9f2b67e1ca43c84ed37ebd027e7e77a0f2f8ef65 (diff) | |
e1000e: Prevent MSI/MSI-X storms
Only signal MSI/MSI-X events on rising edges. So far we re-triggered the
interrupt sources even if the guest did no consumed the pending one,
easily causing interrupt storms.
Issue was observable with Linux 4.16 e1000e driver when MSI-X was used.
Vector 2 was causing interrupt storms after the driver activated the
device.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'hw/net/e1000e_core.h')
| -rw-r--r-- | hw/net/e1000e_core.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/hw/net/e1000e_core.h b/hw/net/e1000e_core.h index 7d8ff41890..63a15510cc 100644 --- a/hw/net/e1000e_core.h +++ b/hw/net/e1000e_core.h @@ -109,6 +109,8 @@ struct E1000Core { NICState *owner_nic; PCIDevice *owner; void (*owner_start_recv)(PCIDevice *d); + + uint32_t msi_causes_pending; }; void |