From: CACook@quantum-sci.com
To: ath10k@lists.infradead.org
Subject: Buss Reset Problem
Date: Mon, 06 Jul 2015 08:04:39 -0700 [thread overview]
Message-ID: <3969592.crxpsBTBQa@andromeda> (raw)
CPU: Intel(R) Xeon(R) CPU E3-1265L v3 @ 2.50GHz
KVM: qemu-kvm-1.5.3-86.el7_1.2.x86_64
Kernel: 4.1.1-1.el7.elrepo.x86_64, and kernel-3.10.0-229.7.2.el7.x86_64
Host & Guest: CentOS 7.1
Using virt-manager-1.1.0-12.el7.noarch to create, configure, and start guest
I am trying to do a PCI passthrough of a QCA988X wifi card. It's a Doodle Labs military-grade 802.11ac miniPCI card. This card configures nicely on the host, and seems to pass through to the KVM guest, but early in the boot of the guest it says "Unknown header type" at the wifi's bus address. And sure enough, lspci -vv on the host then shows:
!!! Unknown header type 7f
Kernel driver in use: vfio-pci
It seems to be the buss reset problem, as outlined here:
http://www.gossamer-threads.com/lists/linux/kernel/2054846
... Except my card locks up on boot of the KVM guest.
When I logged a bug at QEMU (https://bugs.launchpad.net/qemu/+bug/1471583), Alex suggested I add to the patch:
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset);
... So I am in the process of trying that now.
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next reply other threads:[~2015-07-06 15:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-06 15:04 CACook [this message]
2015-07-09 13:33 ` Buss Reset Problem CACook
2015-07-09 13:46 ` Michal Kazior
2015-07-09 14:11 ` CACook
2015-07-10 5:48 ` Michal Kazior
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