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optee: regression with kernel v5.14 (virtualization)

by Jerome Forissier

Hi, I met an issue when testing OP-TEE with the latest released kernel (v5.14). The kernel won't boot when virtualization is enabled. More precisely, the boot hangs as the optee driver is probed. The last line on the console is: [xxx] optee: probing for conduit method. The issue can easily be reproduced in the QEMU OP-TEE environment as documented in [1]: $ repo init -u https://github.com/OP-TEE/manifest.git -m qemu_v8.xml $ repo sync -j10 $ cd linux $ git fetch github --unshallow $ git checkout v5.14 $ cd ../build $ make -j2 toolchains $ make -j10 XEN_BOOT=y run [Note, if you switch between XEN_BOOT=y and the default build, you need to "make arm-tf-clean"] git bisect points at commit b5c10dd04b74 ("optee: Clear stale cache entries during initialization") and reverting this commit on top of v5.14 does resolve the issue. Any idea what's wrong? [1] https://optee.readthedocs.io/en/latest/building/devices/qemu.html#qemu-v8 Thanks, -- Jerome

2 years, 7 months

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[PATCH] Fix FID for FFA_SECONDARY_EP_REGISTER_64

by Sudeep Holla

Commit ef30482b4ad6 ("plat-vexpress: FF-A: update secondary core init") updated secondary core init for the vexpress platform. In the process, it used FFA_SECONDARY_EP_REGISTER with FID 0xC4000084 based on the ALP0 ABI of the spec and the TF-A upstream implementation at the time with a note that the function ID needs to updated to the one finalied in the spec and the TF-A implementation. Assuming it is all finalised now, let us update the same with correct/ updated FID 0xC4000087. Cc: Jens Wiklander <jens.wiklander(a)linaro.org> Cc: Olivier Deprez <olivier.deprez(a)arm.com> Cc: Balint Dobszay <balint.dobszay(a)arm.com> Signed-off-by: Sudeep Holla <sudeep.holla(a)arm.com> --- core/arch/arm/include/ffa.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/core/arch/arm/include/ffa.h b/core/arch/arm/include/ffa.h index 20a009cacabd..b0d68173bf80 100644 --- a/core/arch/arm/include/ffa.h +++ b/core/arch/arm/include/ffa.h @@ -69,7 +69,7 @@ #define FFA_MEM_RECLAIM U(0x84000077) #define FFA_MEM_FRAG_RX U(0x8400007A) #define FFA_MEM_FRAG_TX U(0x8400007B) -#define FFA_SECONDARY_EP_REGISTER_64 U(0xC4000084) +#define FFA_SECONDARY_EP_REGISTER_64 U(0xC4000087) /* Special value for traffic targeted to the Hypervisor or SPM */ #define FFA_TARGET_INFO_MBZ U(0x0) -- 2.25.1

2 years, 7 months

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linaro-swg/linux branch optee rebased onto kernel v5.14

by Jérôme Forissier

Hi, FYI, I have just rebased and force-pushed our Linux branch https://github.com/linaro-swg/linux/tree/optee onto upstream kernel v5.14. Regards, -- Jerome

2 years, 7 months

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Linaro OP-TEE Contributions (LOC) monthly meeting Sep 2021

by Ruchika Gupta

Hi, Linaro OP-TEE Contributions (LOC) monthly meeting is planned to take place on Thursday Sep 23(a)17.00 (UTC+2). Following topics are on the agenda: - OP-TEE Linaro Contribution - Current status and Roadmap - Ruchika - FF-A based mediator in XEN - Jens If you have any other topics you'd like to discuss, please let us know. Meeting details: --------------- Date/time: Thursday Sep 23(a)17.00 (UTC+2) https://everytimezone.com/s/35c9885e Connection details: https://www.trustedfirmware.org/meetings/ Meeting notes: http://bit.ly/loc-notes Regards, Ruchika on behalf of the Linaro OP-TEE team

2 years, 7 months

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[PATCH linux-next] tee/optee/shm_pool: fix application of sizeof to pointer

by CGEL

From: jing yangyang <jing.yangyang(a)zte.com.cn> sizeof when applied to a pointer typed expression gives the size of the pointer. ./drivers/tee/optee/shm_pool.c:38:28-34: ERROR application of sizeof to pointer This issue was detected with the help of Coccinelle. Reported-by: Zeal Robot <zealci(a)zte.com.cn> Signed-off-by: jing yangyang <jing.yangyang(a)zte.com.cn> --- drivers/tee/optee/shm_pool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c index c41a9a5..d167039 100644 --- a/drivers/tee/optee/shm_pool.c +++ b/drivers/tee/optee/shm_pool.c @@ -35,7 +35,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm, unsigned int nr_pages = 1 << order, i; struct page **pages; - pages = kcalloc(nr_pages, sizeof(pages), GFP_KERNEL); + pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL); if (!pages) { rc = -ENOMEM; goto err; -- 1.8.3.1

2 years, 7 months

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[PATCH v5 0/6] Asynchronous notifications from secure world

by Jens Wiklander

Hi all, This adds support for asynchronous notifications from OP-TEE in secure world to the OP-TEE driver. 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. An edge-triggered interrupt is used to notify the driver that there are asynchronous notifications pending. The documentation and DT bindings patches are now well reviewed, but the patches with code would do with some more attention. v4->v5: * Rebased on v5.14-rc7 * Updated documentation to clarify that one interrupt may represent multiple notifications as requested. * Applied Marc's and Rob's tags v3->v4: * Clarfied the expected type of interrypt is edge-triggered, both in the normal documentation and in the DT bindings as requested. v2->v3: * Rebased on v5.14-rc2 which made the patch "dt-bindings: arm: Convert optee binding to json-schema" from the V2 patch set obsolete. * Applied Ard's Acked-by on "optee: add asynchronous notifications" v1->v2: * Added documentation * Converted optee bindings to json-schema and added interrupt property * Configure notification interrupt from DT instead of getting it from secure world, suggested by Ard Biesheuvel <ardb(a)kernel.org>. Thanks, Jens Jens Wiklander (6): docs: staging/tee.rst: add a section on OP-TEE notifications dt-bindings: arm: optee: add interrupt property tee: fix put order in teedev_close_context() tee: add tee_dev_open_helper() primitive optee: separate notification functions optee: add asynchronous notifications .../arm/firmware/linaro,optee-tz.yaml | 7 + Documentation/staging/tee.rst | 30 +++ drivers/tee/optee/Makefile | 1 + drivers/tee/optee/call.c | 27 +++ drivers/tee/optee/core.c | 87 +++++-- drivers/tee/optee/notif.c | 226 ++++++++++++++++++ drivers/tee/optee/optee_msg.h | 9 + drivers/tee/optee/optee_private.h | 23 +- drivers/tee/optee/optee_rpc_cmd.h | 31 +-- drivers/tee/optee/optee_smc.h | 75 +++++- drivers/tee/optee/rpc.c | 73 +----- drivers/tee/tee_core.c | 37 ++- include/linux/tee_drv.h | 27 +++ 13 files changed, 529 insertions(+), 124 deletions(-) create mode 100644 drivers/tee/optee/notif.c -- 2.31.1

2 years, 8 months

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[PATCH v4 0/5] Add FF-A support in OP-TEE driver

by Jens Wiklander

Hi all, This adds supports for the OP-TEE driver to communicate with secure world using FF-A [1] as transport. There is one change to the TEE subsystem with "tee: add sec_world_id to struct tee_shm" to add support for holding globally unique handle assigned by the FF-A. This is a field that I believe could useful for the AMDTEE driver too. For communication the OP-TEE message protocol is still used, but with a new type of memory reference, struct optee_msg_param_fmem, to carry the information needed by FF-A. The OP-TEE driver is refactored internally with to sets of callbacks, one for the old SMC based communication and another set with FF-A as transport. The functions relating to the SMC based ABI are moved to smc_abi.c while the FF-A based ABI is added in a ffa_abi.c. There is also a difference in how the drivers are instantiated. With the SMC based transport we have a platform driver, module_platform_driver(), today which we're keeping as is for this configuration. In a FF-A system we have a FF-A driver, module_ffa_driver(), instead. The OP-TEE driver can be compiled for both targets at the same time and it's up to runtime configuration (device tree or ACPI) to decide how it's initialized. Note that it's only the old SMC based driver instance that need device tree or ACPI to initialize. The FF-A based driver relies on the FF-A bus instead. This can be tested QEMU The repo for SPMC at S-EL1 retrieved by repo init -u https://github.com/jenswi-linaro/manifest.git -m qemu_v8.xml -b ffav4_spmc repo sync # Then checkout the branch optee_ffa_v4 from # git://git.linaro.org/people/jens.wiklander/linux-tee.git # in the linux directory To build do: cd build make toolchains make all To boot: make run-only Test with xtest, perhaps only with the command "xtest 1004" in case you're not interested in too many tests. Thanks, Jens [1] https://developer.arm.com/documentation/den0077/latest v3->v4: - Made a bit more RPC code common between the SMC and FF-A ABIs as requested by Sumit. - Replaced module_platform_driver() with module_init()/module_exit() as described in the commit "optee: isolate smc abi". - Applied Sumit's R-B for the commits "tee: add sec_world_id to struct tee_shm", "optee: simplify optee_release()", and "optee: refactor driver with internal callbacks" v2->v3: - Rebased on 5.14-rc2 which now have the FF-A patches merged - Fixed a couple bugs in optee_shm_register() and optee_shm_unregister() which where introduced in "optee: refactor driver with internal callbacks" in previous the version. - Separated SMC ABI specifics into smc_abi.c to keep it separated from the FF-A ABI functions as requested by Sumit. - Added the FF-A specifics in ffa_abi.c - Provided an implementation for optee_ffa_remove() v1->v2: - Rebased to the FF-A v7 patch - Fixed a couple of reports from kernel test robot <lkp(a)intel.com> Jens Wiklander (5): tee: add sec_world_id to struct tee_shm optee: simplify optee_release() optee: refactor driver with internal callbacks optee: isolate smc abi optee: add FF-A support drivers/tee/optee/Makefile | 7 +- drivers/tee/optee/call.c | 415 ++------- drivers/tee/optee/core.c | 685 ++------------- drivers/tee/optee/ffa_abi.c | 907 ++++++++++++++++++++ drivers/tee/optee/optee_ffa.h | 153 ++++ drivers/tee/optee/optee_msg.h | 27 +- drivers/tee/optee/optee_private.h | 162 +++- drivers/tee/optee/rpc.c | 236 +----- drivers/tee/optee/shm_pool.c | 89 -- drivers/tee/optee/shm_pool.h | 14 - drivers/tee/optee/smc_abi.c | 1299 +++++++++++++++++++++++++++++ include/linux/tee_drv.h | 7 +- 12 files changed, 2665 insertions(+), 1336 deletions(-) create mode 100644 drivers/tee/optee/ffa_abi.c create mode 100644 drivers/tee/optee/optee_ffa.h delete mode 100644 drivers/tee/optee/shm_pool.c delete mode 100644 drivers/tee/optee/shm_pool.h create mode 100644 drivers/tee/optee/smc_abi.c -- 2.31.1

2 years, 8 months

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*Cancelled* Linaro OP-TEE Contributions meeting August 2021

by Joakim Bech

Hi, The meeting was supposed to take place today, but it's still vacation time and we have nothing on the agenda, hence I'm cancelling this month's meeting. Next month things should be back to normal, so see you then. Regards, Joakim on behalf of the Linaro OP-TEE team

2 years, 8 months

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[PATCH v4 0/6] Asynchronous notifications from secure world

by Jens Wiklander

Hi all, This adds support for asynchronous notifications from OP-TEE in secure world to the OP-TEE driver. 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. An edge-triggered interrupt is used to notify the driver that there are asynchronous notifications pending. v3->v4: * Clarfied the expected type of interrypt is edge-triggered, both in the normal documentation and in the DT bindings as requested. v2->v3: * Rebased on v5.14-rc2 which made the patch "dt-bindings: arm: Convert optee binding to json-schema" from the V2 patch set obsolete. * Applied Ard's Acked-by on "optee: add asynchronous notifications" v1->v2: * Added documentation * Converted optee bindings to json-schema and added interrupt property * Configure notification interrupt from DT instead of getting it from secure world, suggested by Ard Biesheuvel <ardb(a)kernel.org>. Thanks, Jens Jens Wiklander (6): docs: staging/tee.rst: add a section on OP-TEE notifications dt-bindings: arm: optee: add interrupt property tee: fix put order in teedev_close_context() tee: add tee_dev_open_helper() primitive optee: separate notification functions optee: add asynchronous notifications .../arm/firmware/linaro,optee-tz.yaml | 7 + Documentation/staging/tee.rst | 29 +++ drivers/tee/optee/Makefile | 1 + drivers/tee/optee/call.c | 27 +++ drivers/tee/optee/core.c | 87 +++++-- drivers/tee/optee/notif.c | 226 ++++++++++++++++++ drivers/tee/optee/optee_msg.h | 9 + drivers/tee/optee/optee_private.h | 23 +- drivers/tee/optee/optee_rpc_cmd.h | 31 +-- drivers/tee/optee/optee_smc.h | 75 +++++- drivers/tee/optee/rpc.c | 73 +----- drivers/tee/tee_core.c | 37 ++- include/linux/tee_drv.h | 27 +++ 13 files changed, 528 insertions(+), 124 deletions(-) create mode 100644 drivers/tee/optee/notif.c -- 2.31.1

2 years, 8 months

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[PATCH 0/3 RESEND] tee: optee: Allow to freeze when tee-supplicant is frozen

by Christoph Gellner

When the system is going to hibernate or suspend it might happen that the tee-supplicant task is frozen first. In this case a running OP-TEE task might get stuck in the loop using wait_for_completion_interruptible to wait for response of tee-supplicant. As a consequence other OP-TEE tasks waiting for the above or a succeeding stuck OP-TEE task might get stuck as well - waiting for call queue entry to be completed - waiting for OPTEE_RPC_WAIT_QUEUE_WAKEUP This will result in the tasks "refusing to freeze" and the hibernate or suspend will fail. OP-TEE issue: https://github.com/OP-TEE/optee_os/issues/4581 - Read back the object PM: suspend entry (s2idle) Filesystems sync: 0.000 seconds Freezing user space processes ... Freezing of tasks failed after 20.008 seconds (3 tasks refusing to freeze, wq_busy=0): task:optee_example_s state:R running task stack: 0 pid: 124 ppid: 1 flags:0x00000001 [<807d3e24>] (__schedule) from [<841c4000>] (0x841c4000) task:optee_example_s state:D stack: 0 pid: 126 ppid: 1 flags:0x00000001 [<807d3e24>] (__schedule) from [<807d41d0>] (schedule+0x60/0x120) [<807d41d0>] (schedule) from [<807d7ffc>] (schedule_timeout+0x1f4/0x340) [<807d7ffc>] (schedule_timeout) from [<807d56a0>] (wait_for_completion+0x94/0xfc) [<807d56a0>] (wait_for_completion) from [<80692134>] (optee_cq_wait_for_completion+0x14/0x60) [<80692134>] (optee_cq_wait_for_completion) from [<806924dc>] (optee_do_call_with_arg+0x14c/0x154) [<806924dc>] (optee_do_call_with_arg) from [<80692edc>] (optee_shm_unregister+0x78/0xcc) [<80692edc>] (optee_shm_unregister) from [<80690a9c>] (tee_shm_release+0x88/0x174) [<80690a9c>] (tee_shm_release) from [<8057f89c>] (dma_buf_release+0x44/0xb0) [<8057f89c>] (dma_buf_release) from [<8028e4e8>] (__dentry_kill+0x110/0x17c) [<8028e4e8>] (__dentry_kill) from [<80276cfc>] (__fput+0xc0/0x234) [<80276cfc>] (__fput) from [<80140b1c>] (task_work_run+0x90/0xbc) [<80140b1c>] (task_work_run) from [<8010b1c8>] (do_work_pending+0x4a0/0x5a0) [<8010b1c8>] (do_work_pending) from [<801000cc>] (slow_work_pending+0xc/0x20) Exception stack(0x843f5fb0 to 0x843f5ff8) 5fa0: 00000000 7ef63448 fffffffe 00000000 5fc0: 7ef63448 76f163b0 7ef63448 00000006 7ef63448 7ef634e0 7ef63438 00000000 5fe0: 00000006 7ef63400 76e74833 76dff856 800e0130 00000004 task:optee_example_s state:D stack: 0 pid: 128 ppid: 1 flags:0x00000001 [<807d3e24>] (__schedule) from [<807d41d0>] (schedule+0x60/0x120) [<807d41d0>] (schedule) from [<807d7ffc>] (schedule_timeout+0x1f4/0x340) [<807d7ffc>] (schedule_timeout) from [<807d56a0>] (wait_for_completion+0x94/0xfc) [<807d56a0>] (wait_for_completion) from [<8069359c>] (optee_handle_rpc+0x554/0x710) [<8069359c>] (optee_handle_rpc) from [<806924cc>] (optee_do_call_with_arg+0x13c/0x154) [<806924cc>] (optee_do_call_with_arg) from [<80692910>] (optee_invoke_func+0x110/0x190) [<80692910>] (optee_invoke_func) from [<8068fe3c>] (tee_ioctl+0x113c/0x1244) [<8068fe3c>] (tee_ioctl) from [<802892ec>] (sys_ioctl+0xe0/0xa24) [<802892ec>] (sys_ioctl) from [<80100060>] (ret_fast_syscall+0x0/0x54) Exception stack(0x8424ffa8 to 0x8424fff0) ffa0: 00000000 7eb67584 00000003 8010a403 7eb67438 7eb675fc ffc0: 00000000 7eb67584 7eb67604 00000036 7eb67448 7eb674e0 7eb67438 00000000 ffe0: 76ef7030 7eb6742c 76ee6469 76e83178 OOM killer enabled. Restarting tasks ... done. PM: suspend exit sh: write error: Device or resource busy The patch set will switch to interruptible waits and add try_to_freeze to allow the waiting OP-TEE tasks to be frozen as well. --- In my humble understanding without these patches OP-TEE tasks have only been frozen in user-space. With these patches it is possible that OP-TEE tasks are frozen although the OP-TEE command invocation didn't complete. I'm unable to judge if there are any OP-TEE implementations relying on the fact that suspend won't happen while the OP-TEE command invocation didn't complete. The theoretical alternative would be to prevent that tee-supplicant is frozen first. I was able to reproduce the issue in OP-TEE QEMU v7 using a modified version of optee_example_secure_storage (loop around REE FS read, support multi-session). See https://github.com/OP-TEE/optee_os/issues/4581 for details. After applying these patches (minor adjustments of the includes) I was no longer able to reproduce the issues. In my tests OP-TEE QEMU v7 did suspend and resume without troubles. I'm not able to test on other devices supporting OP-TEE. I decided to handle each of the locations the OP-TEE task could get stuck as a separate commit. The downside is that the above call stack doesn't really fit to any of the commits. Christoph Gellner (3): tee: optee: Allow to freeze the task waiting for tee-supplicant tee: optee: Allow to freeze while waiting for call_queue tee: optee: Allow to freeze while waiting in OPTEE_RPC_WAIT_QUEUE_SLEEP drivers/tee/optee/call.c | 8 +++++++- drivers/tee/optee/rpc.c | 9 ++++++++- drivers/tee/optee/supp.c | 3 +++ 3 files changed, 18 insertions(+), 2 deletions(-) base-commit: c4681547bcce777daf576925a966ffa824edd09d -- 2.32.0.rc0

2 years, 8 months

1
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