Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1731781
| From | Ken Goldman <kgold@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [tpmdd-devel] [PATCH v2 1/4] tpm: ignore burstcount to improve tpm_tis send() performance. |
| Date | 2017-09-13 21:00 +0200 |
| Message-ID | <upl3b-2DF-1@gated-at.bofh.it> (permalink) |
| References | <umI5X-1TZ-3@gated-at.bofh.it> <umI5X-1TZ-1@gated-at.bofh.it> <umLdw-4da-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 9/6/2017 12:12 PM, Jason Gunthorpe wrote: > > The problem with this approach is that the TPM could totally block > the CPU for very long periods of time. > > It seems very risky to enable.. > How would you characterize "very long"? The TPM vendors confirm that they empty the FIFO at internal speeds that are comparable to the bus speed. Thus, any stall will be sub-usec. Is that an issue? In addition, new TPMs have ever larger FIFO's, making stalls less likely going forward.
Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread
Re: [tpmdd-devel] [PATCH v2 1/4] tpm: ignore burstcount to improve tpm_tis send() performance. Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-09-13 21:00 +0200 Re: [tpmdd-devel] [PATCH v2 1/4] tpm: ignore burstcount to improve tpm_tis send() performance. Peter Huewe <peterhuewe@gmx.de> - 2017-09-13 21:10 +0200
csiph-web