12 Sep
2014
12 Sep
'14
7:14 a.m.
On 09/08/2014 09:05 PM, Stefan Berger wrote:
From: Stefan Berger <stefanb@linux.vnet.ibm.com>
Pass the TPM file descriptor to QEMU via command line. Instead of passing /dev/tpm0 we now pass /dev/fdset/10 and the additional parameters -add-fd set=10,fd=20.
This addresses the use case when QEMU is started with non-root privileges and QEMU cannot open /dev/tpm0 for example.
One problem is that for the passing of the file descriptor set to work, virCommandReorderFDs must not be called on the virCommand. This is prevented by setting a flag in the virCommandPassFDGetFDIndex that is checked to be clear when virCommandReorderFDs is run.
Anyone got comments on this patch? Stefan