Re: [Xen-devel] Xen 4.4 development update: Is PVH a blocker?

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Dec 16, 2013 at 06:59:16PM +0100, Sander Eikelenboom wrote:
> 
> Monday, December 16, 2013, 6:46:35 PM, you wrote:
> 
> > On Mon, Dec 16, 2013 at 06:24:20PM +0100, Sander Eikelenboom wrote:
> >> 
> >> Monday, December 16, 2013, 4:09:06 PM, you wrote:
> >> 
> >> >> >> * qemu-upstream not freeing pirq
> >> >> >>  > http://www.gossamer-threads.com/lists/xen/devel/281498
> >> >> >>  > http://marc.info/?l=xen-devel&m=137265766424502
> >> >> >>  status: patches posted; latest patches need testing
> >> >> >>  Not a blocker.
> >> >> 
> >> >> > I can't test it, b/c qemu-upstream does not work with PCI passthrough
> >> >> > anymore.
> >> >> 
> >> >> Strange, pci passthrough in general works for me on "simple" pci 
> >> >> devices (usb cards, videograbber) with latest qemu-upstream and seabios 
> >> >> upstream.
> >> >> (if you have no need for pci rombars, no vga passthrough, no need for 
> >> >> specifying funky things about which virtual functions to passthrough)
> >> >> 
> >> >> What are you trying to passthrough ?
> >> 
> >> > -bash-4.1# lspci -s 01:00.0 -v 
> >> > 01:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network 
> >> > Connection (rev 01)
> >> >         Subsystem: Intel Corporation Gigabit ET Dual Port Server Adapter
> >> >         Flags: fast devsel, IRQ 16
> >> >         Memory at fbc20000 (32-bit, non-prefetchable) [disabled] 
> >> > [size=128K]
> >> >         Memory at fb800000 (32-bit, non-prefetchable) [disabled] 
> >> > [size=4M]
> >> >         I/O ports at e020 [disabled] [size=32]
> >> >         Memory at fbc44000 (32-bit, non-prefetchable) [disabled] 
> >> > [size=16K]
> >> >         Expansion ROM at fb400000 [disabled] [size=4M]
> >> >         Capabilities: [40] Power Management version 3
> >> >         Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
> >> >         Capabilities: [70] MSI-X: Enable- Count=10 Masked-
> >> >         Capabilities: [a0] Express Endpoint, MSI 00
> >> >         Capabilities: [100] Advanced Error Reporting
> >> >         Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-45-d9-ac
> >> >         Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
> >> >         Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
> >> >         Kernel driver in use: pciback
> >> >         Kernel modules: igb
> >> 
> >> 
> >> >> What problems do you have / errors do you see ?
> >> >> 
> >> 
> >> > http://www.gossamer-threads.com/lists/xen/devel/309476?do=post_view_threaded
> >> 
> >> 
> >> Could it be related to the outstanding issue (since 4.3) of:
> >> 
> >> * PCI hole resize support hvmloader/qemu-traditional/qemu-upstream with 
> >> PCI/GPU passthrough
> >>   > http://lists.xen.org/archives/html/xen-devel/2013-05/msg02813.html
> >>   > Where Stefano writes:
> >>   > 2) for Xen 4.4 rework the two patches above and improve
> >>   > i440fx_update_pci_mem_hole: resizing the pci_hole subregion is not
> >>   > enough, it also needs to be able to resize the system memory region
> >>   > (xen.ram) to make room for the bigger pci_hole
> >> 
> >>   Your card seems to need quite some resources, and restricted to 32bit, 
> >> even other SR-IOV cards seems to to with less and or support 32 bit.
> >> 
> 
> > I don't think that is the problem. The QEMU-xen did work at some point - 
> > until
> > I blew away 'qemu-xen-dir' to get the newest and best. So I think the 
> > problem
> > I am seeing is with QEMU 1.6 regression.
> 
> 
> Could try to get the latest upstream qemu and seabios patches then by 
> changing your trees in Config.mk to the upstream qemu tree:
> 
> git://git.qemu.org/qemu.git
> 
> and
> 
> git://git.qemu.org/seabios.git
> (at the extra config option questions, just except the defaults).
> 
> It's what i run at the moment, could be there is a off-chance there is a 
> patch upstream that fixes your problem that's not in the xen qemu upstream 
> tree yet.

I did this:
diff --git a/Config.mk b/Config.mk
index 2007b22..7702fff 100644
--- a/Config.mk
+++ b/Config.mk
@@ -235,7 +235,13 @@ SEABIOS_UPSTREAM_URL ?= git://xenbits.xen.org/seabios.git
 endif
 OVMF_UPSTREAM_REVISION ?= 447d264115c476142f884af0be287622cd244423
 QEMU_UPSTREAM_REVISION ?= master
-SEABIOS_UPSTREAM_TAG ?= rel-1.7.3.1
+
+SEABIOS_UPSTREAM_URL = git://git.qemu.org/seabios.git
+QEMU_UPSTREAM_URL = git://git.qemu.org/qemu.git
+
+SEABIOS_UPSTREAM_TAG = origin/master
+
+#SEABIOS_UPSTREAM_TAG ?= rel-1.7.3.1
 # Fri Aug 2 14:12:09 2013 -0400
 # Fix bug in CBFS file walking with compressed files.
 

rm -Rf tools/firmware/seabios-dir* tools/qemu-xen*
rebuilt and had the same issue :-(

> 

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