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Date: Thu, 16 Apr 2015 18:02:27 +0200
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Subject: Re: [Qemu-devel] ARM: PCI devices emulation broken with KVM due to
	cache issue
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To: =?UTF-8?B?SsOpcsOpbXkgRmFuZ3XDqGRl?= <j.fanguede@virtualopensystems.com>, QEMU Developers <qemu-devel@nongnu.org>
Cc: VirtualOpenSystems Technical Team <tech@virtualopensystems.com>, kvmarm@lists.cs.columbia.edu



On 16/04/2015 17:54, Jérémy Fanguède wrote:
> The guest kernel driver of the lsi device fails to enable it correctly
> with a cache error:
> [...]
> sym53c8xx 0000:00:01.0: enabling device (0100 -> 0103)
> sym0: <895a> rev 0x0 at pci 0000:00:01.0 irq 54
> sym0: No NVRAM, ID 7, Fast-40, LVD, parity checking
> CACHE TEST FAILED: chip wrote 2, host read 1.
> sym0: CACHE INCORRECTLY CONFIGURED.
> sym0: giving up ...
> [...]

Note that this is just a failure in the driver self-test.  It has
nothing to do with the processor cache (though there are other problems
with PCI and the processor cache in KVM mode).

Do not use this QEMU device.  The emulation is incomplete and it's slow.
 Use virtio-scsi or megasas instead.  Still, I'm not sure that would
work with KVM; as far as I know, most work on the ARM PCI host bridge
was done using UEFI firmware.

Paolo