Re: [PATCH v3 0/2] tpm: add mssim backend

[Stefan Berger]

On 12/19/22 08:13, James Bottomley wrote:
> From: James Bottomley <James.Bottomley@HansenPartnership.com>
>
> The requested feedback was to convert the tpmdev handler to being json
> based, which requires rethreading all the backends.  The good news is
> this reduced quite a bit of code (especially as I converted it to
> error_fatal handling as well, which removes the return status
> threading).  The bad news is I can't test any of the conversions.
> swtpm still isn't building on opensuse and, apparently, passthrough
> doesn't like my native TPM because it doesn't allow cancellation.

For passthrough you can use /dev/null in place of the cancel file. Libvirt does 
that also:

https://github.com/stefanberger/libvirt-tpm/blob/master/src/util/virtpm.c#L88

   Stefan