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Date: Wed, 07 May 2014 18:41:40 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] qtest and pci mmio?
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To: Gerd Hoffmann <kraxel@redhat.com>, qemu-devel <qemu-devel@nongnu.org>

Il 07/05/2014 18:06, Gerd Hoffmann ha scritto:
>   Hi,
> 
> Trying to add something real to the new ehci test.  Having trouble
> accessing the ehci mmio registers.  uhci io registers are working fine.
> Current patch attached, which just does a register dump to stderr.  uhci
> looks sane.  ehci shouldn't be all zeros.  Anyone has a clue?
> 
> thanks,
>   Gerd
> 

diff --git a/tests/libqos/pci.c b/tests/libqos/pci.c
index 7e0907b..c9a0b91 100644
--- a/tests/libqos/pci.c
+++ b/tests/libqos/pci.c
@@ -103,7 +103,7 @@ void qpci_config_writew(QPCIDevice *dev, uint8_t offset, uint16_t value)
 
 void qpci_config_writel(QPCIDevice *dev, uint8_t offset, uint32_t value)
 {
-    dev->bus->config_writew(dev->bus, dev->devfn, offset, value);
+    dev->bus->config_writel(dev->bus, dev->devfn, offset, value);
 }
 
 
This should help. :)

Re. how to find it, I modified the -qtest-log option to use /dev/tty instead of
/dev/null (there was a patch to add a QTEST_LOG environment variable...), and
the BAR sizing looked a bit suspicious:

[R +0.023561] outl 0xcf8 0x8000ef10
[S +0.023567] OK
[R +0.023584] outw 0xcfc 0xffff
[S +0.024013] OK
[R +0.024036] outl 0xcf8 0x8000ef10
[S +0.024043] OK
[R +0.024061] inl 0xcfc
[S +0.024068] OK 0xf000
[R +0.024086] outl 0xcf8 0x8000ef10
[S +0.024093] OK
[R +0.024110] outw 0xcfc 0x0
[S +0.024519] OK

Paolo