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Disks in mptsas1068 scsi controller not seen by linux
When using the mptsas1068 scsi controller, linux detects the controller itself but not the drives attached to it. Freebsd works. Using a different controller with linux works. VMware with linux works.
qemu 2.6.50 (v2.6.0-1925-g6b92bbf)
seabios rel-1.9.0-139-gae3f78f (master branch, required for mptsas1068 support)
Test script, loosely based off what libvirt runs and the libvirt tests that Paolo Bonzini wrote [1]
#####################
iso=archlinux-2016.07.01-dual.iso
#iso=FreeBSD-10.3-RELEASE-amd64-bootonly.iso
device=mptsas1068
#device=lsi
img=empty.img
qemu-img create -f qcow2 $img 1G
/usr/bin/qemu-system-x86_64 \
-enable-kvm \
-m 1024 \
-boot menu=on \
-device $device,id=scsi0,bus=pci.0,addr=0x9 \
-drive file=$img,format=qcow2,if=none,id=drive-scsi0-0-0-0 \
-device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=2 \
-drive file=$iso,format=raw,if=none,id=drive-ide0-0-1,readonly=on \
-device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=1
#####################
The ISOs can be downloaded from [2] and [3].
After booting linux, do "lsblk". /dev/sda should exist.
After booting freebsd, do "geom disk list". A da0 / "QEMU QEMU HARDDISK" should be mentioned.
With device=mptsas1068 this fails in linux.
With device=lsi line it works in both.
With VMWare and a linux VM (opensuse 10.1, kernel 2.6.18) which only loads modules for mptsas1068, this works.
I also reproduced this with the debian 8.5 netinstall image, but it insists in making you pick a driver from a list of modules when it fails to mount it, instead of dropping to a shell.
Arch linux dmesg output snippet (full output attached as arch-linux-dmesg.txt):
#####################
root@archiso ~ # dmesg | grep -i -e mpt -e scsi -e ioc0
[ 0.000000] Linux version 4.6.3-1-ARCH (builduser@tobias) (gcc version 6.1.1 20160602 (GCC) ) #1 SMP PREEMPT Fri Jun 24 21:19:13 CEST 2016
[ 0.000000] Normal empty
[ 0.000000] Preemptible hierarchical RCU implementation.
[ 1.879616] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[ 1.951581] SCSI subsystem initialized
[ 1.957113] Fusion MPT base driver 3.04.20
[ 1.957618] Fusion MPT SAS Host driver 3.04.20
[ 2.281773] scsi host0: ata_piix
[ 2.285372] scsi host1: ata_piix
[ 2.305803] mptbase: ioc0: Initiating bringup
[ 2.363555] ioc0: LSISAS1068 A0: Capabilities={Initiator}
[ 2.444390] scsi 0:0:1:0: CD-ROM QEMU QEMU DVD-ROM 2.5+ PQ: 0 ANSI: 5
[ 2.500572] scsi host2: ioc0: LSISAS1068 A0, FwRev=01329200h, Ports=8, MaxQ=128, IRQ=11
[ 2.507024] sr 0:0:1:0: [sr0] scsi3-mmc drive: 4x/4x cd/rw xa/form2 tray
[ 2.507274] sr 0:0:1:0: Attached scsi CD-ROM sr0
#####################
The controller itself is detected, the disk isn't.
An early version of this patch [4] said that it was only tested with FreeBSD:
>Tested with FreeBSD for now. The previous version (before the
>configuration page rewrite) worked with RHEL and Windows guests as well.
>
>TODO: write qtest for (at least) config pages, test Linux and Windows.
[1]: https://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=fc922eb2080a3fa7b24bc8a8b0aabfd394480143
[2]: https://www.archlinux.org/download
[3]: https://www.freebsd.org/where.html
[4]: https://lists.nongnu.org/archive/html/qemu-devel/2015-10/msg06475.html
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