On Thu, Jun 27, 2024 at 04:59:38PM GMT, Gokul Sriram P wrote: > > On 6/27/2024 4:38 PM, Dmitry Baryshkov wrote: > > On Thu, Jun 27, 2024 at 03:31:01PM GMT, Gokul Sriram P wrote: > > > On 6/27/2024 12:47 AM, Dmitry Baryshkov wrote: > > > > On Tue, Jun 25, 2024 at 11:03:30AM GMT, Gokul Sriram P wrote: > > > > > On 6/22/2024 2:38 AM, Dmitry Baryshkov wrote: > > > > > > On Fri, Jun 21, 2024 at 05:16:52PM GMT, Gokul Sriram Palanisamy > > > > > > wrote: > > > > > > > PRNG clock is needed by the secure PIL, support for the same > > > > > > > is added in subsequent patches. > > > > > > Which 'same'? > > > > > > What is 'secure PIL'? > > > > > will elaborate in the updated version. > > > > > To answer your question, secure PIL is signed PIL image which only > > > > > TrustZone can authenticate and load. > > > > Fine. So, the current driver can not load WCSS firmware on IPQ8074, is > > > > that correct? Or was there some kind of firmware interface change? The > > > > driver was added in 2018, so I can only hope that at that point it > > > > worked. Could you please explain, what happened? > > > The existing wcss driver can load unsigned PIL images without the > > > involvement of TrustZone. That works even now. > > > With the current change, we are trying to add signed PIL as an option > > > based > > > on "wcss->need_mem_protection" if set. For signed PIL alone, we send a PAS > > > request to TrustZone to authenticate and load. > > I see that you are enabling it unconditionally for IPQ8074. How is it > > going to work? > > Correct Dmitry. In this change, it is forcing secure PIL. With a separate > driver for secure PIL, this will be sorted right?
That depends. How will the running system decide, which driver to use? It can not be a compile-time decision. > > Regards, > > Gokul > > > > I also just noticed that Bjorn had suggested to submit a new driver for > > > the > > > PAS based IPQ WCSS instead of overloading this driver. Will also address > > > that and post a new driver in updated revision. > > > > > > Regards, > > > Gokul > > > > > > > Signed-off-by: Nikhil Prakash V <quic_nprak...@quicinc.com> > > > > > > > Signed-off-by: Sricharan R <quic_srich...@quicinc.com> > > > > > > > Signed-off-by: Gokul Sriram Palanisamy <quic_gokul...@quicinc.com> > > > > > > > --- > > > > > > > drivers/remoteproc/qcom_q6v5_wcss.c | 65 > > > > > > > +++++++++++++++++++++-------- > > > > > > > 1 file changed, 47 insertions(+), 18 deletions(-) -- With best wishes Dmitry
