| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <CAFA6WYNRVa_oem2TdyjoaUOTmW+vED-7LOC4wFjqG+puptg8tQ@mail.gmail.com>
Date: Thu, 23 May 2024 13:04:55 +0530
From: Sumit Garg <sumit.garg@...aro.org>
To: Gavin Liu (劉哲廷) <Gavin.Liu@...iatek.com>
Cc: "jens.wiklander@...aro.org" <jens.wiklander@...aro.org>,
"matthias.bgg@...il.com" <matthias.bgg@...il.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
"op-tee@...ts.trustedfirmware.org" <op-tee@...ts.trustedfirmware.org>
Subject: Re: [PATCH v3] optee: add timeout value to optee_notif_wait() to
support timeout
On Tue, 21 May 2024 at 14:16, Gavin Liu (劉哲廷) <Gavin.Liu@...iatek.com> wrote:
>
> Hi, Sumit,
>
> The corresponding OPTEE-OS pull request and change is here.
>
> https://github.com/OP-TEE/optee_os/pull/6641
As this is an ABI change where I see backwards compatibility is
maintained. However, the forwards compatibility requires this change
to be backported to stable releases. So for the next version please CC
stable ML.
>
> On Mon, 2024-05-20 at 16:16 +0530, Sumit Garg wrote:
> >
> > External email : Please do not click links or open attachments until
> > you have verified the sender or the content.
> > Hi,
> >
> > On Tue, 7 May 2024 at 07:31, gavin.liu <gavin.liu@...iatek.com>
> > wrote:
> > >
> > > From: Gavin Liu <gavin.liu@...iatek.com>
> > >
> > > Add timeout value to support self waking when timeout to avoid
> > waiting
> > > indefinitely.
> > >
> > > Signed-off-by: Gavin Liu <gavin.liu@...iatek.com>
> > > ---
> > > change in v3:
> > > 1. change the comment in optee_rpc_cmd.h
> > > 2. add macro for "TEE_ERROR_TIMEOUT"
> > > 3. change from "TEEC_ERROR_BUSY" to "TEE_ERROR_TIMEOUT"
> > > ---
> > > drivers/tee/optee/notif.c | 9 +++++++--
> > > drivers/tee/optee/optee_private.h | 5 ++++-
> > > drivers/tee/optee/optee_rpc_cmd.h | 1 +
> > > drivers/tee/optee/rpc.c | 10 ++++++++--
> > > 4 files changed, 20 insertions(+), 5 deletions(-)
> > >
FWIW:
Reviewed-by: Sumit Garg <sumit.garg@...aro.org>
> >
> > > diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c
> > > index 0d7878e770cd..1970880c796f 100644
> > > --- a/drivers/tee/optee/notif.c
> > > +++ b/drivers/tee/optee/notif.c
> > > @@ -29,7 +29,7 @@ static bool have_key(struct optee *optee, u_int
> > key)
> > > return false;
> > > }
> > >
> > > -int optee_notif_wait(struct optee *optee, u_int key)
> > > +int optee_notif_wait(struct optee *optee, u_int key, u32 timeout)
> > > {
> > > unsigned long flags;
> > > struct notif_entry *entry;
> > > @@ -70,7 +70,12 @@ int optee_notif_wait(struct optee *optee, u_int
> > key)
> > > * Unlock temporarily and wait for completion.
> > > */
> > > spin_unlock_irqrestore(&optee->notif.lock, flags);
> > > - wait_for_completion(&entry->c);
> > > + if (timeout != 0) {
> > > + if (!wait_for_completion_timeout(&entry->c,
> > timeout))
> > > + rc = -ETIMEDOUT;
> > > + } else {
> > > + wait_for_completion(&entry->c);
> > > + }
> > > spin_lock_irqsave(&optee->notif.lock, flags);
> > >
> > > list_del(&entry->link);
> > > diff --git a/drivers/tee/optee/optee_private.h
> > b/drivers/tee/optee/optee_private.h
> > > index 429cc20be5cc..424898cdc4e9 100644
> > > --- a/drivers/tee/optee/optee_private.h
> > > +++ b/drivers/tee/optee/optee_private.h
> > > @@ -26,6 +26,9 @@
> > > #define TEEC_ERROR_BUSY 0xFFFF000D
> > > #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010
> > >
> > > +/* API Return Codes are from the GP TEE Internal Core API
> > Specification */
> > > +#define TEE_ERROR_TIMEOUT 0xFFFF3001
> > > +
> > > #define TEEC_ORIGIN_COMMS 0x00000002
> > >
> > > /*
> > > @@ -252,7 +255,7 @@ struct optee_call_ctx {
> > >
> > > int optee_notif_init(struct optee *optee, u_int max_key);
> > > void optee_notif_uninit(struct optee *optee);
> > > -int optee_notif_wait(struct optee *optee, u_int key);
> > > +int optee_notif_wait(struct optee *optee, u_int key, u32 timeout);
> > > int optee_notif_send(struct optee *optee, u_int key);
> > >
> > > u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t
> > num_params,
> > > diff --git a/drivers/tee/optee/optee_rpc_cmd.h
> > b/drivers/tee/optee/optee_rpc_cmd.h
> > > index f3f06e0994a7..4576751b490c 100644
> > > --- a/drivers/tee/optee/optee_rpc_cmd.h
> > > +++ b/drivers/tee/optee/optee_rpc_cmd.h
> > > @@ -41,6 +41,7 @@
> > > * Waiting on notification
> > > * [in] value[0].a OPTEE_RPC_NOTIFICATION_WAIT
> > > * [in] value[0].b notification value
> > > + * [in] value[0].c timeout in milliseconds or 0 if no
> > timeout
> > > *
> > > * Sending a synchronous notification
> > > * [in] value[0].a OPTEE_RPC_NOTIFICATION_SEND
> > > diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
> > > index f086812f1179..5de4504665be 100644
> > > --- a/drivers/tee/optee/rpc.c
> > > +++ b/drivers/tee/optee/rpc.c
> > > @@ -130,6 +130,8 @@ static void
> > handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
> > > static void handle_rpc_func_cmd_wq(struct optee *optee,
> > > struct optee_msg_arg *arg)
> > > {
> > > + int rc = 0;
> > > +
> > > if (arg->num_params != 1)
> > > goto bad;
> > >
> > > @@ -139,7 +141,8 @@ static void handle_rpc_func_cmd_wq(struct optee
> > *optee,
> > >
> > > switch (arg->params[0].u.value.a) {
> > > case OPTEE_RPC_NOTIFICATION_WAIT:
> > > - if (optee_notif_wait(optee, arg-
> > >params[0].u.value.b))
> > > + rc = optee_notif_wait(optee, arg-
> > >params[0].u.value.b, arg->params[0].u.value.c);
> > > + if (rc)
> > > goto bad;
> > > break;
> > > case OPTEE_RPC_NOTIFICATION_SEND:
> > > @@ -153,7 +156,10 @@ static void handle_rpc_func_cmd_wq(struct
> > optee *optee,
> > > arg->ret = TEEC_SUCCESS;
> > > return;
> > > bad:
> > > - arg->ret = TEEC_ERROR_BAD_PARAMETERS;
> > > + if (rc == -ETIMEDOUT)
> > > + arg->ret = TEE_ERROR_TIMEOUT;
> > > + else
> > > + arg->ret = TEEC_ERROR_BAD_PARAMETERS;
> > > }
> > >
> > > static void handle_rpc_func_cmd_wait(struct optee_msg_arg *arg)
> > > --
> > > 2.18.0
>
> Regards,
> Gavin Liu
> > >
>
> ************* MEDIATEK Confidentiality Notice ********************
> The information contained in this e-mail message (including any
> attachments) may be confidential, proprietary, privileged, or otherwise
> exempt from disclosure under applicable laws. It is intended to be
> conveyed only to the designated recipient(s). Any use, dissemination,
> distribution, printing, retaining or copying of this e-mail (including its
> attachments) by unintended recipient(s) is strictly prohibited and may
> be unlawful. If you are not an intended recipient of this e-mail, or believe
> that you have received this e-mail in error, please notify the sender
> immediately (by replying to this e-mail), delete any and all copies of
> this e-mail (including any attachments) from your system, and do not
> disclose the content of this e-mail to any other person. Thank you!
This text is not meant for public mailing lists. So please work with
your IT team to allow you to post to public mailing lists without this
text.
-Sumit
Powered by blists - more mailing lists