Date: Sat, 18 May 2019 13:06:40 -0700 (PDT) From: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> To: Nick Principe <nap@ixsystems.com> Cc: freebsd-virtualization@freebsd.org Subject: Re: Windows 10 guests fail to boot when attempting to passthrough network card Message-ID: <201905182006.x4IK6euM066455@gndrsh.dnsmgr.net> In-Reply-To: <CA%2Bi9KEzNoT3L7BxnyGE%2BS=3Cm8pVu_bBi=jM%2BigDE97Pr6F5OQ@mail.gmail.com>
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> I have noticed that Windows 10 guests fail to boot when attempting to pass > through a network card. I believe I have observed this with both cxgbe > (t580) and mlx5en cards, but only have a cxgbe to test with now. Without > passthrough, the Windows 10 guest boots and operates normally. > > FreeBSD guests (12.0-RELEASE) have no issue when booting with the cxgbe > card passed through - I can kldload cxgbe and I get both cxl ports showing > up in the FreeBSD guest. > > I have tested this with both 12.0-RELEASE and head (13-CURRENT r347883) as > the host OS with no change in behavior. The bhyve output is: > Unhandled ps2 keyboard command 0x02 > Unhandled ps2 keyboard command 0x02 > Assertion failed: (error == 0), function modify_bar_registration, file > /usr/src/usr.sbin/bhyve/pci_emul.c, line 504. > fbuf frame buffer base: 0x943600000 [sz 16777216] > > Two main suggestions from discussions at BSDCan this week were: > - Capture pciconf -lvb from the FreeBSD guest > - Add some printf to pci_emul.c to capture some values when there is an > error > > I've captured the above, and a lot of other relevant info, in a Google Doc > here (too big to post directly): > https://docs.google.com/document/d/1t-UVIO9Aq0TPUFHyo1nVscqaW1LoPuNhfLPitL8oeTs/edit?usp=sharing > > `nap To confirm what I see from looking at your data could you tell me if this patch triggers a barf? --- mem.c.orig 2019-05-18 20:04:26.707995000 +0000 +++ mem.c 2019-05-18 20:04:02.205119000 +0000 @@ -97,6 +97,7 @@ return (0); } +printf("mmio_rb_lookup: barf ENOENT"); return (ENOENT); } -- Rod Grimes rgrimes@freebsd.org
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