Re: [Qemu-devel] [PATCH][v12] megasas: LSI Megaraid SAS HBA emulation

[Hannes Reinecke <hare@suse.de>]

On 02/18/2012 01:38 PM, Gerhard Wiesinger wrote:
> Hello Hannes,
> 
> Patch applies well to qemu tree and with a one line modification to
> qemu-kvm.
> 
> My testcase was to install Fedora 16 x64 on qemu-kvm. Unfortunatly
> it was NOT successful.
> 
> 1.) Strange thing is that udevd got into timeouts and tries to kill
> a lot afterwards.
> 2.) Report that udevadm settle - timeout of 120 seconds reached, the
> event queue contains: ....
> 3.) Then it hangs in Examining Devices ...
> 
> Looks like that hd device is dead.
> 
> With LSI 53C895A everything is fine and install works well.
> 
> Any ideas?
> 
> Command line:
> /root/download/qemu/git/qemu-kvm/x86_64-softmmu/qemu-system-x86_64
>  -device megasas,id=raid,romfile=BIOS/MegaSAS.rom
> -drive file=VM-FEDORA/fedora.qcow2,if=none,cache=unsafe,id=id0
> -device scsi-disk,drive=id0
> -cdrom ISO/Fedora-16-x86_64-DVD.iso
> -boot order=cad,menu=on -m 2048 -k de -vga vmware -vnc :0
> -bios /root/download/seabios/git/seabios/out/bios.bin
> -device rtl8139,mac=00:02:44:92:87:6a,vlan=0,romfile=
> -net tap,ifname=tap0,script=no,downscript=no,vlan=0
> -device pcnet,mac=1a:46:0b:ca:bc:7e,vlan=1,romfile=
> -net tap,ifname=tap1,script=no,downscript=no,vlan=1
> 

MSI-X support is buggered, and due to a bug in megasas.c you cannot
switch it off :-(

Please try with this patch:

diff --git a/hw/megasas.c b/hw/megasas.c
index 26cc355..4f74ab6 100644
--- a/hw/megasas.c
+++ b/hw/megasas.c
@@ -1972,7 +1977,6 @@ static int megasas_scsi_init(PCIDevice *dev)
                           0x40000);

     pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
&s->mmio_io);
-    s->flags |= MEGASAS_FLAG_USE_MSIX;
     memory_region_init(&s->msix_io, "megasas-msix", 4096);
     if (megasas_use_msix(s) && !msix_init(&s->dev, 1, &s->msix_io,
1, 0)) {
         pci_register_bar(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,

(Mind the linewrap)

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)