Re: Aw: Re: [tpmdd-devel] [PATCH] tpm: improve tpm_tis send() performance by ignoring burstcount
Ken Goldman <[email protected]>
| Newsgroups | net.sourceforge.lists.tpmdd-devel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-security-module |
|---|---|
| Message-ID | <[email protected]> |
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.