On Wed, May 10, 2023 at 1:19 PM Sumit Garg <sumit.garg@xxxxxxxxxx> wrote:
>
> On Tue, 9 May 2023 at 13:03, Rijo Thomas <Rijo-john.Thomas@xxxxxxx> wrote:
> >
> > After TEE has completed processing of TEE_CMD_ID_LOAD_TA, set proper
> > value in 'return_origin' argument passed by open_session() call. To do
> > so, add 'return_origin' field to the structure tee_cmd_load_ta. The
> > Trusted OS shall update return_origin as part of TEE processing.
> >
> > This change to 'struct tee_cmd_load_ta' interface requires a similar update
> > in AMD-TEE Trusted OS's TEE_CMD_ID_LOAD_TA interface.
> >
> > This patch has been verified on Phoenix Birman setup. On older APUs,
> > return_origin value will be 0.
> >
> > Cc: stable@xxxxxxxxxxxxxxx
> > Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver")
> > Tested-by: Sourabh Das <sourabh.das@xxxxxxx>
> > Signed-off-by: Rijo Thomas <Rijo-john.Thomas@xxxxxxx>
> > ---
> > v2:
> > * Added Fixes tag.
> >
> > drivers/tee/amdtee/amdtee_if.h | 10 ++++++----
> > drivers/tee/amdtee/call.c | 30 +++++++++++++++++-------------
> > 2 files changed, 23 insertions(+), 17 deletions(-)
> >
>
> Acked-by: Sumit Garg <sumit.garg@xxxxxxxxxx>
I'm picking up this.
Thanks,
Jens
>
> -Sumit
>
> > diff --git a/drivers/tee/amdtee/amdtee_if.h b/drivers/tee/amdtee/amdtee_if.h
> > index ff48c3e47375..e2014e21530a 100644
> > --- a/drivers/tee/amdtee/amdtee_if.h
> > +++ b/drivers/tee/amdtee/amdtee_if.h
> > @@ -118,16 +118,18 @@ struct tee_cmd_unmap_shared_mem {
> >
> > /**
> > * struct tee_cmd_load_ta - load Trusted Application (TA) binary into TEE
> > - * @low_addr: [in] bits [31:0] of the physical address of the TA binary
> > - * @hi_addr: [in] bits [63:32] of the physical address of the TA binary
> > - * @size: [in] size of TA binary in bytes
> > - * @ta_handle: [out] return handle of the loaded TA
> > + * @low_addr: [in] bits [31:0] of the physical address of the TA binary
> > + * @hi_addr: [in] bits [63:32] of the physical address of the TA binary
> > + * @size: [in] size of TA binary in bytes
> > + * @ta_handle: [out] return handle of the loaded TA
> > + * @return_origin: [out] origin of return code after TEE processing
> > */
> > struct tee_cmd_load_ta {
> > u32 low_addr;
> > u32 hi_addr;
> > u32 size;
> > u32 ta_handle;
> > + u32 return_origin;
> > };
> >
> > /**
> > diff --git a/drivers/tee/amdtee/call.c b/drivers/tee/amdtee/call.c
> > index e8cd9aaa3467..e9b63dcb3194 100644
> > --- a/drivers/tee/amdtee/call.c
> > +++ b/drivers/tee/amdtee/call.c
> > @@ -423,19 +423,23 @@ int handle_load_ta(void *data, u32 size, struct tee_ioctl_open_session_arg *arg)
> > if (ret) {
> > arg->ret_origin = TEEC_ORIGIN_COMMS;
> > arg->ret = TEEC_ERROR_COMMUNICATION;
> > - } else if (arg->ret == TEEC_SUCCESS) {
> > - ret = get_ta_refcount(load_cmd.ta_handle);
> > - if (!ret) {
> > - arg->ret_origin = TEEC_ORIGIN_COMMS;
> > - arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
> > -
> > - /* Unload the TA on error */
> > - unload_cmd.ta_handle = load_cmd.ta_handle;
> > - psp_tee_process_cmd(TEE_CMD_ID_UNLOAD_TA,
> > - (void *)&unload_cmd,
> > - sizeof(unload_cmd), &ret);
> > - } else {
> > - set_session_id(load_cmd.ta_handle, 0, &arg->session);
> > + } else {
> > + arg->ret_origin = load_cmd.return_origin;
> > +
> > + if (arg->ret == TEEC_SUCCESS) {
> > + ret = get_ta_refcount(load_cmd.ta_handle);
> > + if (!ret) {
> > + arg->ret_origin = TEEC_ORIGIN_COMMS;
> > + arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
> > +
> > + /* Unload the TA on error */
> > + unload_cmd.ta_handle = load_cmd.ta_handle;
> > + psp_tee_process_cmd(TEE_CMD_ID_UNLOAD_TA,
> > + (void *)&unload_cmd,
> > + sizeof(unload_cmd), &ret);
> > + } else {
> > + set_session_id(load_cmd.ta_handle, 0, &arg->session);
> > + }
> > }
> > }
> > mutex_unlock(&ta_refcount_mutex);
> > --
> > 2.25.1
> >
