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Re: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple emulated TPMs

Started byStefan Berger <stefanb@linux.vnet.ibm.com>
First post2016-03-17 18:50 +0100
Last post2016-03-18 14:10 +0100
Articles 3 — 2 participants

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  Re: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple  emulated TPMs Stefan Berger <stefanb@linux.vnet.ibm.com> - 2016-03-17 18:50 +0100
    Re: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple  emulated TPMs Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-03-18 10:00 +0100
      Re: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple  emulated TPMs Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2016-03-18 14:10 +0100

#1360085 — Re: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple emulated TPMs

FromStefan Berger <stefanb@linux.vnet.ibm.com>
Date2016-03-17 18:50 +0100
SubjectRe: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple emulated TPMs
Message-ID<rdKdA-1Zz-9@gated-at.bofh.it>
On 03/16/2016 04:42 PM, Jarkko Sakkinen wrote:
> On Sun, Mar 13, 2016 at 06:54:38PM -0400, Stefan Berger wrote:
>> +
>> +/* above flags */
>> +#define VTPM_PROXY_FLAG_TPM2  1  /* emulator is TPM 2 */
>> +
>> +/* all supported flags */
>> +#define VTPM_PROXY_FLAGS_ALL  (VTPM_PROXY_FLAG_TPM2)
> This can be moved inside the .c-file?

I can move that.

>
>> +
>> +#define VTPM_PROXY_MAGIC 0xa1
>> +
>> +#define VTPM_PROXY_IOC_NEW_DEV   _IOW(VTPM_PROXY_MAGIC, 0x00, \
>> +				      struct vtpm_proxy_new_dev)
> Could we simply replace these four lines with one line:
>
> #deifne VTPM_PROXY_IOC_NEW_DEV _IOW('t', 0x00, struct vtpm_proxy_new_dev);

Does this make it better?

>
> I changed the magic but does it matter?

I would keep the magic at '0xa1'. The documentation is written to '0xa1' 
now and seems to be good just as any other.

    Stefan

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#1360441

FromJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Date2016-03-18 10:00 +0100
Message-ID<rdYqe-3dS-3@gated-at.bofh.it>
In reply to#1360085
On Thu, Mar 17, 2016 at 01:45:20PM -0400, Stefan Berger wrote:
> On 03/16/2016 04:42 PM, Jarkko Sakkinen wrote:
> >On Sun, Mar 13, 2016 at 06:54:38PM -0400, Stefan Berger wrote:
> >>+
> >>+/* above flags */
> >>+#define VTPM_PROXY_FLAG_TPM2  1  /* emulator is TPM 2 */
> >>+
> >>+/* all supported flags */
> >>+#define VTPM_PROXY_FLAGS_ALL  (VTPM_PROXY_FLAG_TPM2)
> >This can be moved inside the .c-file?
> 
> I can move that.
> 
> >
> >>+
> >>+#define VTPM_PROXY_MAGIC 0xa1
> >>+
> >>+#define VTPM_PROXY_IOC_NEW_DEV   _IOW(VTPM_PROXY_MAGIC, 0x00, \
> >>+				      struct vtpm_proxy_new_dev)
> >Could we simply replace these four lines with one line:
> >
> >#deifne VTPM_PROXY_IOC_NEW_DEV _IOW('t', 0x00, struct vtpm_proxy_new_dev);
> 
> Does this make it better?
> 
> >
> >I changed the magic but does it matter?
> 
> I would keep the magic at '0xa1'. The documentation is written to '0xa1' now
> and seems to be good just as any other.

OK. Works for me. Keep the ioctl definition as it is.

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

I can move the constant. You don't have to send a new patch version
anymore. I start keeping this patch in my master but will not merge it
to next before 4.6-rc5 so at the moment it would be scheduled for 4.7.
Does this sound good for you?

Further improvemnts should be sent as separate fixup patches.

>    Stefan

/Jarkko

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#1360600

FromJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Date2016-03-18 14:10 +0100
Message-ID<re2ka-6eM-5@gated-at.bofh.it>
In reply to#1360441
On Fri, Mar 18, 2016 at 10:52:00AM +0200, Jarkko Sakkinen wrote:
> On Thu, Mar 17, 2016 at 01:45:20PM -0400, Stefan Berger wrote:
> > On 03/16/2016 04:42 PM, Jarkko Sakkinen wrote:
> > >On Sun, Mar 13, 2016 at 06:54:38PM -0400, Stefan Berger wrote:
> > >>+
> > >>+/* above flags */
> > >>+#define VTPM_PROXY_FLAG_TPM2  1  /* emulator is TPM 2 */
> > >>+
> > >>+/* all supported flags */
> > >>+#define VTPM_PROXY_FLAGS_ALL  (VTPM_PROXY_FLAG_TPM2)
> > >This can be moved inside the .c-file?
> > 
> > I can move that.
> > 
> > >
> > >>+
> > >>+#define VTPM_PROXY_MAGIC 0xa1
> > >>+
> > >>+#define VTPM_PROXY_IOC_NEW_DEV   _IOW(VTPM_PROXY_MAGIC, 0x00, \
> > >>+				      struct vtpm_proxy_new_dev)
> > >Could we simply replace these four lines with one line:
> > >
> > >#deifne VTPM_PROXY_IOC_NEW_DEV _IOW('t', 0x00, struct vtpm_proxy_new_dev);
> > 
> > Does this make it better?
> > 
> > >
> > >I changed the magic but does it matter?
> > 
> > I would keep the magic at '0xa1'. The documentation is written to '0xa1' now
> > and seems to be good just as any other.
> 
> OK. Works for me. Keep the ioctl definition as it is.
> 
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> 
> I can move the constant. You don't have to send a new patch version
> anymore. I start keeping this patch in my master but will not merge it
> to next before 4.6-rc5 so at the moment it would be scheduled for 4.7.
> Does this sound good for you?
> 
> Further improvemnts should be sent as separate fixup patches.

Applied to git://git.infradead.org/users/jjs/linux-tpmdd.git.

/Jarkko

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