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Re: Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance by ignoring burstcount

From Ken Goldman <kgold@linux.vnet.ibm.com>
Newsgroups linux.kernel
Subject Re: Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance by ignoring burstcount
Date 2017-08-11 23:40 +0200
Message-ID <udpOW-eI-21@gated-at.bofh.it> (permalink)
References <ubOHL-7EB-7@gated-at.bofh.it> <ubORr-7Id-13@gated-at.bofh.it> <ucicO-4h6-15@gated-at.bofh.it> <ucFM6-3O1-19@gated-at.bofh.it> <ucGoO-4hg-27@gated-at.bofh.it>
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On 8/9/2017 5:00 PM, Peter Huewe wrote:
> 
> Since we are the linux kernel, we do have to care for legacy
> devices. And a system with LPC, PS2Mouse on SuperIO and a TPM are not
> that uncommon.
> 
> And heck, we even have support for 1.1b TPM devices....

Understood.  However, remember that SuperIO is a 1980's device that
predates the TPM.  Since the TPM requires special LPC bus cycles, it's
even less likely that an old chipset has an attached TPM.

> Interesting - let me check with Georg tomorrow. Unfortunately I do
> not have access to my tcg mails from home (since I'm not working :), 
> but did you _explicitly_ talk about LPC and the system? I'm sure the
> TPM does not care about the waitstates...

Yes, Infineon was one of the 3 TPM vendors who confirmed this.

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Thread

[PATCH] tpm: improve tpm_tis send() performance by ignoring burstcount Nayna Jain <nayna@linux.vnet.ibm.com> - 2017-08-07 13:50 +0200
  Re: [PATCH] tpm: improve tpm_tis send() performance by ignoring burstcount Peter Huewe <peterhuewe@gmx.de> - 2017-08-07 14:00 +0200
    Re: [PATCH] tpm: improve tpm_tis send() performance by ignoring  burstcount Nayna <nayna@linux.vnet.ibm.com> - 2017-08-07 16:30 +0200
      Re: [PATCH] tpm: improve tpm_tis send() performance by ignoring  burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-09 00:00 +0200
    Re: [PATCH] tpm: improve tpm_tis send() performance by ignoring  burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-08 21:20 +0200
      Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance by  ignoring burstcount Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-08-09 22:30 +0200
        Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount "Peter Huewe" <PeterHuewe@gmx.de> - 2017-08-09 22:50 +0200
          Re: Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-08-12 00:00 +0200
            Re: Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-08-16 22:00 +0200
      Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance by  ignoring burstcount Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-08-09 22:30 +0200
        Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount "Peter Huewe" <PeterHuewe@gmx.de> - 2017-08-09 23:10 +0200
          Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-11 13:20 +0200
            Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Mimi Zohar <zohar@linux.vnet.ibm.com> - 2017-08-11 17:40 +0200
              Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-14 13:00 +0200
                Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-14 13:00 +0200
                Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Mimi Zohar <zohar@linux.vnet.ibm.com> - 2017-08-14 14:10 +0200
                Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-15 08:10 +0200
                Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Mimi Zohar <zohar@linux.vnet.ibm.com> - 2017-08-14 14:20 +0200
                Re: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-15 08:10 +0200
          Re: Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send()  performance by ignoring burstcount Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-08-11 23:40 +0200
            Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance  by ignoring burstcount msuchanek <msuchanek@suse.de> - 2017-08-14 02:00 +0200
              Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance by  ignoring burstcount Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-08-16 00:10 +0200
                Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance  by ignoring burstcount Michal Suchánek <msuchanek@suse.de> - 2017-08-16 12:30 +0200
        Re: [Linux-ima-devel] [tpmdd-devel] [PATCH] tpm: improve tpm_tis  send() performance by ignoring burstcount Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-08-11 23:50 +0200
  Re: [PATCH] tpm: improve tpm_tis send() performance by ignoring  burstcount Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2017-08-08 21:10 +0200

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