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Re: [Qemu-devel] [PATCH V8 14/14] Allow to provide inital TPM state

From: Michael S. Tsirkin
Subject: Re: [Qemu-devel] [PATCH V8 14/14] Allow to provide inital TPM state
Date: Wed, 7 Sep 2011 16:57:37 +0300
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Sep 07, 2011 at 09:51:00AM -0400, Stefan Berger wrote:
> On 09/07/2011 07:23 AM, Michael S. Tsirkin wrote:
> >On Tue, Sep 06, 2011 at 10:45:34PM -0400, Stefan Berger wrote:
> >>On 09/04/2011 12:38 PM, Michael S. Tsirkin wrote:
> >>>On Thu, Sep 01, 2011 at 11:00:56PM -0400, Stefan Berger wrote:
> >>>
> >>>initstate_fd=<file descriptor>
> >>>initstate_base64=on/off (or base64/bin if you really expect
> >>>   more formats in the future)
> >>>
> >>>and use qemu routines to get the fd so they can be
> >>>passed through the monitor later ...
> >>>
> >>I suppose you mean monitor_get_fd(). That functions seems to only be
> >>used by net.c so far and if  understand the chain of functions
> >>correctly that are called with the monitor as parameter it helps in
> >>hotplugging net devices ? For the TPM I would like to *not* have
> >>support for hotplugging since that device is supposed to be soldered
> >>to the motherboard and needs to be initialized through a command
> >>sequence by the (v)BIOS, so it has to be present early on during
> >>machine startup.
> >>
> >>   Stefan
> >Fine, but let's reuse common functions and save code duplication,
> >especially parsing functions.
> >
> When parsing the command line there's no Monitor being passed
> around. So in case of 'net' net_handle_fd_param() (net.c)  ends up
> not invoking monitor_get_fd() but the else branch where strtol() is
> used to convert the fd. Now I won't call net_handle_fd_param() but
> could introduce tpm_handle_fd_param() also calling strtol(). Though
> that would not make me call a common function but duplicating the
> code there... I don't know of another function handling the parsing
> of fd's. Is there one ? If not, I'll also just fall back to using
> strtol().
>   Stefan

We can create a common function and use that for net and tpm.


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