1925586e03
Add a new ioctl to disable all MSI-X interrupts for a PCI passthrough device and invoke it if a write to the MSI-X capability registers disables MSI-X. This avoids leaving MSI-X interrupts enabled on the host if a guest device driver has disabled them (e.g. as part of detaching a guest device driver). This was found by Chelsio QA when testing that a Linux guest could switch from MSI-X to MSI interrupts when using the cxgb4vf driver. While here, explicitly fail requests to enable MSI on a passthrough device if MSI-X is enabled and vice versa. Reported by: Sony Arpita Das @ Chelsio Reviewed by: grehan, markj MFC after: 2 weeks Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D27212 |
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| Makefile | ||
| Makefile.depend | ||
| vmmapi_freebsd.c | ||
| vmmapi.c | ||
| vmmapi.h | ||