On 5/19/19 6:24 AM, Rodney W. Grimes wrote: >> Does the card have multiple BARs? Can you send us the output of pciconf -lvb >> for the card? >> >> There is a bug in bhyve where if the OS assigns the 0xffffffff sentinel to >> more than one BAR simultaneously it is not compatible with bhyve?s memory >> model for the guest. > > The "we talked" below is myself and Nick talking about exactly that > which came from jhb@ pointing out to me in a hall wall > conversation here at BSDCan that this is the cause of this > problem and is a known issue. > > Does anyone have fixes for this issue?
I have not tested this at all, but I have a candidate patch to fix the root issue at https://github.com/freebsd/freebsd/compare/master...bsdjhb:bhyve_passthrough_barsize My first guess at the problem wasn't quite right (though Windows does indeed size BARs in parallel). For pass-through devices we aren't currently correctly disabling access to a BAR when the guest disables it in the PCI command register which in turn trips the assertion when using a Windows guest, but in general we need to be honoring the enable bits when set or cleared by the guest. -- John Baldwin _______________________________________________ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
