Re: [Xen-users] drivers organisation

["Christopher G. Stach II" <cgs@xxxxxxxxx>]

PUCCETTI Armand wrote:
> I try to understand how drivers are organised after compiling XEN 3.0.3
> source code.
> Normally, for a given kernel, let X, drivers are located in
> /lib/modules/<X>/kernel/drivers
> 
> When building two kernels, xen0 and xenU I have driver files in
> /lib/modules/2.6.16.29-xen0/kernel/drivers:
> |---------------------------------------
> ./acpi:
> ac.ko         battery.ko  fan.ko       processor.ko  toshiba_acpi.ko
> asus_acpi.ko  button.ko   ibm_acpi.ko  thermal.ko    video.ko
> 
> ./char:
> agp  drm
> 
> ./char/agp:
> agpgart.ko  amd64-agp.ko
> 
> ./char/drm:
> drm.ko  mga.ko  r128.ko  radeon.ko  sis.ko  tdfx.ko
> ----------------------------------------|
> 
> and driver files in /lib/modules/2.6.16.29-xenU/kernel/drivers:
> |-----------------------------------------
> ./atm:
> atmtcp.ko
> 
> ./block:
> cryptoloop.ko  floppy.ko  loop.ko  nbd.ko
> 
> ./bluetooth:
> hci_uart.ko  hci_vhci.ko
> 
> ./cdrom:
> cdrom.ko
> 
> ./md:
> dm-crypt.ko   dm-snapshot.ko  multipath.ko  raid1.ko  xor.ko
> dm-mirror.ko  dm-zero.ko      raid0.ko      raid5.ko
> dm-mod.ko     linear.ko       raid10.ko     raid6.ko
> 
> ./net:
> appletalk  eql.ko  netconsole.ko   ppp_generic.ko  ppp_synctty.ko  wireless
> bonding    irda    ppp_async.ko    pppoe.ko        slhc.ko
> dummy.ko   mii.ko  ppp_deflate.ko  pppox.ko        tun.ko
> 
> ./net/appletalk:
> ipddp.ko
> 
> ./net/bonding:
> bonding.ko
> 
> ./net/irda:
> act200l-sir.ko  girbil-sir.ko    ma600-sir.ko       sir-dev.ko
> actisys-sir.ko  irtty-sir.ko     mcp2120-sir.ko     tekram-sir.ko
> esi-sir.ko      litelink-sir.ko  old_belkin-sir.ko
> 
> ./net/wireless:
> atmel.ko
> 
> ./scsi:
> osst.ko      scsi_transport_fc.ko   sd_mod.ko  sr_mod.ko
> scsi_mod.ko  scsi_transport_spi.ko  sg.ko      st.ko
> ---------------------------------------|
> 
> With respect to SATA, I see only their driver files in the xenU subtree.
> 
> I also see two .config files, one in xen/linux-2.6.16.29-xen0 and one in
> xen/linux-2.6.16.29-xenU.
> The first one has options on SATA as follows
> 
> CONFIG_SCSI_SATA=y
> CONFIG_SCSI_SATA_AHCI=y
> CONFIG_SCSI_SATA_SVW=y
> CONFIG_SCSI_ATA_PIIX=y
> CONFIG_SCSI_SATA_MV=y
> CONFIG_SCSI_SATA_NV=y
> 
> and the second one has these ones:
> 
> CONFIG_SCSI_SATA=m
> 
> Now, could someone please explain me how these config/driver files are
> bound to each other?
> With the above config files (they're default settings), should SATA work
> correctly?
> If I need to change a config option, where should I do it? In both
> config files or just one of them?
> 
> thanks for any explanation (and sorry for the long post)
> Armand
> 
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

For a paravirtualized kernel, you don't need the hardware drivers in the
domU at all.  dom0 probably needs them to boot off of the primary hard
disk, so they can't be modules (unless you use an initrd.)

-- 
Christopher G. Stach II


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