RE: [PATCH v3 2/4] tmp/tpm_crb: fix Intel PTT hw bug during idle state

2016-09-27 Thread Winkler, Tomas
> > On Thu, Sep 15, 2016 at 09:23:29AM +0300, Jarkko Sakkinen wrote: > > On Mon, Sep 12, 2016 at 04:04:19PM +0300, Tomas Winkler wrote: > > > There is a HW bug in Skylake, and Broxton PCH Intel PTT device, > > > where most of the registers in the control area except START, > > > REQUEST, CANCEL, a

Re: [PATCH v3 2/4] tmp/tpm_crb: fix Intel PTT hw bug during idle state

2016-09-27 Thread Jarkko Sakkinen
On Thu, Sep 15, 2016 at 09:23:29AM +0300, Jarkko Sakkinen wrote: > On Mon, Sep 12, 2016 at 04:04:19PM +0300, Tomas Winkler wrote: > > There is a HW bug in Skylake, and Broxton PCH Intel PTT device, where > > most of the registers in the control area except START, REQUEST, CANCEL, > > and LOC_CTRL l

Re: [PATCH v3 2/4] tmp/tpm_crb: fix Intel PTT hw bug during idle state

2016-09-14 Thread Jarkko Sakkinen
On Mon, Sep 12, 2016 at 04:04:19PM +0300, Tomas Winkler wrote: > There is a HW bug in Skylake, and Broxton PCH Intel PTT device, where > most of the registers in the control area except START, REQUEST, CANCEL, > and LOC_CTRL lost retention when the device is in the idle state. Hence > we need to br

[PATCH v3 2/4] tmp/tpm_crb: fix Intel PTT hw bug during idle state

2016-09-12 Thread Tomas Winkler
There is a HW bug in Skylake, and Broxton PCH Intel PTT device, where most of the registers in the control area except START, REQUEST, CANCEL, and LOC_CTRL lost retention when the device is in the idle state. Hence we need to bring the device to ready state before accessing the other registers. The