On 8/13/24 21:17, Navdeep Parhar wrote:
On 7/31/24 7:50 AM, John Baldwin wrote:
The branch main has been updated by jhb:
URL:
https://cgit.FreeBSD.org/src/commit/?id=f44ff2aba2d64d1d9312cb55008dc90275ccdc04
commit f44ff2aba2d64d1d9312cb55008dc90275ccdc04
Author: John Baldwin <j...@freebsd.org>
AuthorDate: 2024-07-31 14:50:33 +0000
Commit: John Baldwin <j...@freebsd.org>
CommitDate: 2024-07-31 14:50:33 +0000
bhyve: Treat the COMMAND register for PCI passthru devices as emulated
Don't pass through writes of the command register through to the
physical device. These registers do not need to be in sync, and in
some cases (e.g. when the guest is sizing the BAR and temporarily
disables decoding), the states need to diverge.
This seems to break MSI-X interrupts for a device that is passed through
to a VM. That is, the device generates an interrupt but the driver in
the VM never receives it. Reverting this change fixes the problem.
Yes, https://reviews.freebsd.org/D46245 is what I have been using. It turns
out the ppt(4) driver wasn't fully managing the command register.
--
John Baldwin
