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Removes the redundant TEE_SHM_DMA_BUF, TEE_SHM_EXT_DMA_BUF,
TEE_SHM_MAPPED and TEE_SHM_KERNEL_MAPPED flags.
TEE_SHM_REGISTER is renamed to TEE_SHM_DYNAMIC in order to better
match its usage.
Assigns new values to the remaining flags to void gaps.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Adds a common helper function to free a tee_shm allocated using the
helper function optee_pool_op_alloc_helper().
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
tee_shm_alloc() is replaced by three new functions,
tee_shm_alloc_user_buf() - for user mode allocations, replacing passing
the flags TEE_SHM_MAPPED | TEE_SHM_DMA_BUF
tee_shm_alloc_kernel_buf() - for kernel mode allocations, slightly
optimized compared to using the flags TEE_SHM_MAPPED | TEE_SHM_DMA_BUF.
tee_shm_alloc_priv_buf() - primarily for TEE driver internal use.
This also makes the interface easier to use as we can get rid of the
somewhat hard to use flags parameter.
The TEE subsystem and the TEE drivers are updated to use the new
functions instead.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Replaces the shared memory pool based on two pools with a single pool.
The alloc() function pointer in struct tee_shm_pool_ops gets another
parameter, align. This makes it possible to make less than page aligned
allocations from the optional reserved shared memory pool while still
making user space allocations page aligned. With in practice unchanged
behaviour using only a single pool for bookkeeping.
The allocation algorithm in the static OP-TEE shared memory pool is
changed from best-fit to first-fit since only the latter supports an
alignment parameter. The best-fit algorithm was previously the default
choice and not a conscious one.
The optee and amdtee drivers are updated as needed to work with this
changed pool handling.
This also removes OPTEE_SHM_NUM_PRIV_PAGES which becomes obsolete with
this change as the private pages can be mixed with the payload pages.
The OP-TEE driver changes minimum alignment for argument struct from 8
bytes to 512 bytes. A typical OP-TEE private shm allocation is 224 bytes
(argument struct with 6 parameters, needed for open session). So with an
alignment of 512 well waste a bit more than 50%. Before this we had a
single page reserved for this so worst case usage compared to that would
be 3 pages instead of 1 page. However, this worst case only occurs if
there is a high pressure from multiple threads on secure world. All in
all this should scale up and down better than fixed boundaries.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Adds a driver private tee_context by moving the tee_context in struct
optee_notif to struct optee. This tee_context was previously used when
doing internal calls to secure world to deliver notification.
The new driver internal tee_context is now also when allocating driver
private shared memory. This decouples the shared memory object from its
original tee_context. This is needed when the life time of such a memory
allocation outlives the client tee_context.
This patch fixes the problem described below:
The addition of a shutdown hook by commit f25889f931 ("optee: fix tee out
of memory failure seen during kexec reboot") introduced a kernel shutdown
regression that can be triggered after running the OP-TEE xtest suites.
Once the shutdown hook is called it is not possible to communicate any more
with the supplicant process because the system is not scheduling task any
longer. Thus if the optee driver shutdown path receives a supplicant RPC
request from the OP-TEE we will deadlock the kernel's shutdown.
Fixes: f25889f931 ("optee: fix tee out of memory failure seen during kexec reboot")
Fixes: 217e0250cc ("tee: use reference counting for tee_context")
Reported-by: Lars Persson <larper@axis.com>
Cc: stable@vger.kernel.org
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
There are cleanups and minor bugfixes across several SoC specific
drivers, for Qualcomm, Samsung, NXP i.MX, AT91, Tegra, Keystone,
Renesas, ZynqMP
Noteworthy new features are:
- The op-tee firmware driver gains support for asynchronous
notifications from secure-world firmware.
- Qualcomm platforms gain support for new SoC types in various
drivers: power domain, cache controller, RPM sleep, soc-info
- Samsung SoC drivers gain support for new SoCs in ChipID and PMU,
as well as a new USIv2 driver that handles various types of
serial communiction (uart, i2c, spi)
- Renesas adds support for R-Car S4-8 (R8A779F0) in multiple
drivers, as well as memory controller support for RZ/G2L
(R9A07G044).
- Apple M1 gains support for the PMGR power management driver
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Merge tag 'drivers-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann:
"There are cleanups and minor bugfixes across several SoC specific
drivers, for Qualcomm, Samsung, NXP i.MX, AT91, Tegra, Keystone,
Renesas, ZynqMP
Noteworthy new features are:
- The op-tee firmware driver gains support for asynchronous
notifications from secure-world firmware.
- Qualcomm platforms gain support for new SoC types in various
drivers: power domain, cache controller, RPM sleep, soc-info
- Samsung SoC drivers gain support for new SoCs in ChipID and PMU, as
well as a new USIv2 driver that handles various types of serial
communiction (uart, i2c, spi)
- Renesas adds support for R-Car S4-8 (R8A779F0) in multiple drivers,
as well as memory controller support for RZ/G2L (R9A07G044).
- Apple M1 gains support for the PMGR power management driver"
* tag 'drivers-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (94 commits)
soc: qcom: rpmh-rsc: Fix typo in a comment
soc: qcom: socinfo: Add SM6350 and SM7225
dt-bindings: arm: msm: Don't mark LLCC interrupt as required
dt-bindings: firmware: scm: Add SM6350 compatible
dt-bindings: arm: msm: Add LLCC for SM6350
soc: qcom: rpmhpd: Sort power-domain definitions and lists
soc: qcom: rpmhpd: Remove mx/cx relationship on sc7280
soc: qcom: rpmhpd: Rename rpmhpd struct names
soc: qcom: rpmhpd: sm8450: Add the missing .peer for sm8450_cx_ao
soc: qcom: socinfo: add SM8450 ID
soc: qcom: rpmhpd: Add SM8450 power domains
dt-bindings: power: rpmpd: Add SM8450 to rpmpd binding
soc: qcom: smem: Update max processor count
dt-bindings: arm: qcom: Document SM8450 SoC and boards
dt-bindings: firmware: scm: Add SM8450 compatible
dt-bindings: arm: cpus: Add kryo780 compatible
soc: qcom: rpmpd: Add support for sm6125
dt-bindings: qcom-rpmpd: Add sm6125 power domains
soc: qcom: aoss: constify static struct thermal_cooling_device_ops
PM: AVS: qcom-cpr: Use div64_ul instead of do_div
...
Eliminate the following coccicheck warning:
./drivers/tee/optee/smc_abi.c:1508:12-15: ERROR: optee is NULL but
dereferenced.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Fixes: 6749e69c4d ("optee: add asynchronous notifications")
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Adds support for asynchronous notifications from secure world to normal
world. This allows a design with a top half and bottom half type of
driver where the top half runs in secure interrupt context and a
notifications tells normal world to schedule a yielding call to do the
bottom half processing.
The protocol is defined in optee_msg.h optee_rpc_cmd.h and optee_smc.h.
A notification consists of a 32-bit value which normal world can
retrieve using a fastcall into secure world. The value
OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF (0) has a special meaning.
When this value is sent it means that normal world is supposed to make a
yielding call OPTEE_MSG_CMD_DO_BOTTOM_HALF.
Notification capability is negotiated while the driver is initialized.
If both sides supports these notifications then they are enabled.
An interrupt is used to notify the driver that there are asynchronous
notifications pending. The maximum needed notification value is
communicated at this stage. This allows scaling up when needed.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Renames struct optee_wait_queue to struct optee_notif and all related
functions to optee_notif_*().
The implementation is changed to allow sending a notification from an
atomic state, that is from the top half of an interrupt handler.
Waiting for keys is currently only used when secure world is waiting for
a mutex or condition variable. The old implementation could handle any
32-bit key while this new implementation is restricted to only 8 bits or
the maximum value 255. A upper value is needed since a bitmap is
allocated to allow an interrupt handler to only set a bit in case the
waiter hasn't had the time yet to allocate and register a completion.
The keys are currently only representing secure world threads which
number usually are never even close to 255 so it should be safe for now.
In future ABI updates the maximum value of the key will be communicated
while the driver is initializing.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Isolate the ABI based on raw SMCs. Code specific to the raw SMC ABI is
moved into smc_abi.c. This makes room for other ABIs with a clear
separation.
The driver changes to use module_init()/module_exit() instead of
module_platform_driver(). The platform_driver_register() and
platform_driver_unregister() functions called directly to keep the same
behavior. This is needed because module_platform_driver() is based on
module_driver() which can only be used once in a module.
A function optee_rpc_cmd() is factored out from the function
handle_rpc_func_cmd() to handle the ABI independent part of RPC
processing.
This patch is not supposed to change the driver behavior, it's only a
matter of reorganizing the code.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
