Messages in this thread | | | From | Jens Wiklander <> | Date | Mon, 11 Oct 2021 11:29:23 +0200 | Subject | Re: [PATCH v6 5/5] optee: add FF-A support |
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On Fri, Oct 8, 2021 at 9:21 PM Jerome Forissier <jerome@forissier.org> wrote: > > Hi Sudeep, > > On 10/8/21 6:32 PM, Sudeep Holla wrote: > > On Fri, Oct 08, 2021 at 02:27:32PM +0100, Sudeep Holla wrote: > >> On Wed, Oct 06, 2021 at 09:09:02AM +0200, Jens Wiklander wrote: > >>> Adds support for using FF-A [1] as transport to the OP-TEE driver. > >>> > >>> Introduces struct optee_msg_param_fmem which carries all information > >>> needed when OP-TEE is calling FFA_MEM_RETRIEVE_REQ to get the shared > >>> memory reference mapped by the hypervisor in S-EL2. Register usage is > >>> also updated to include the information needed. > >>> > >>> The FF-A part of this driver is enabled if CONFIG_ARM_FFA_TRANSPORT is > >>> enabled. > >>> > >> > >> I am not sure if I missed this with earlier version but I see the below > >> warning the second time I insert the optee module. I am sure I tested it > >> with previous version when I was fixing issues with FF-A as a module. > >> > >> Not sure if I am missing something in my steps. > >> > > > > OK, more info, indeed I didn't observe this issue 2 weeks back with optee > > at commit 57e642f12085 ("core: enable system PTA upon user TA support"). > > The UUID(d96a5b40-c3e5-21e3-8794-1002a5d5c61b) wasn't enumerated with above > > commit. Today I am testing the latest commit 2de2880065f3 ("core: update > > reference link to PrimeCell Cache Controller"). > > > > Though it looks like an issue with the driver, the latest optee changes > > triggered the driver to hit this issue in my setup. Hope this helps. > > Totally makes sense. The optee_os commit triggering this is almost > certainly 811c42d40cd0 ("plat-vexpress: enable CFG_ENABLE_EMBEDDED_TESTS > by default"). With this commit, the "invoke tests" PTA gets included by > default in the TEE binary. This PTA has the TA_FLAG_DEVICE_ENUM flag so > it is enumerated by the Linux driver. AFAICT the vexpress platform has > no other PTA with that flag, so as you said the OP-TEE commit is simply > exposing a bug in the Linux driver. > > > IIUC we are not undoing optee_register_device executed via > > optee_enumerate_devices in the exit path. > > That doesn't sound good indeed ;)
Thanks for the analysis, I'll look into this.
Cheers, Jens
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