Re: bhyve passthru problem

Oleksandr,I would like to try an experiment to try to fix your problem. If
you agree,I could send you my bhyve and vmm.ko files,if you want. I suspect
that they may fix your problem. Let me know if you want to try.

On Fri, Jun 14, 2024 at 8:35 AM Corvin Köhne <corvink@freebsd.org> wrote:

> On Thu, 2024-06-13 at 10:53 +0300, Oleksandr Kryvulia wrote:
> >  I'm trying to passthru a wwan-adapter to linux guest using
> > sysutils/vm-bhyve-devel.
> >
> >  ppt0@pci0:8:0:0:        class=0x0d4000 rev=0x01 hdr=0x00
> > vendor=0x8086 device=0x7560 subvendor=0x1cf8 subdevice=0x8654
> >     vendor     = 'Intel Corporation'
> >     device     = 'XMM7560 LTE Advanced Pro Modem'
> >     class      = wireless controller
> >     subclass   = cellular controller/modem
> >
> >  The guest does not start with an error:
> >
> >  bhyve: passthru device 8/0/0 BAR 2: base 0xbc201000 or size 0x100
> > not page aligned
> >  bhyve: failed to initialize BARs for PCI 8/0/0
> >  Device emulation initialization error: No such file or directory
> >
> >  What I am doing wrong?
> >
>
> The BAR size of your device is smaller than a page. Unfortunately, you
> can't change it, so there's nothing you can do right now.
>
> I don't know why bhyve validates the BAR size. The commit adding this
> check is old [1] and doesn't explain it. What bhyve could do is
> rounding up the BAR size to a full page size when allocating memory for
> the BAR.
>
> [1] https://github.com/freebsd/freebsd-
> src/commit/7a902ec0eccc752c9c38533ed123121eaaea1225
>
>
> --
> Kind regards,
> Corvin
>


-- 
Mario.