Tee-dev December 2018

tee-dev@lists.linaro.org

6 participants
4 discussions

[PATCH] optee: allow to work without static shared memory

by Volodymyr Babchuk

From: Volodymyr Babchuk <vlad.babchuk(a)gmail.com> On virtualized systems it is possible that OP-TEE will provide only dynamic shared memory support. So it is fine to boot without static SHM enabled if dymanic one is supported. Signed-off-by: Volodymyr Babchuk <vlad.babchuk(a)gmail.com> --- drivers/tee/optee/core.c | 83 ++++++++++++++++++++++++++++-------------------- 1 file changed, 49 insertions(+), 34 deletions(-) diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index 4a2c420..d80da29 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -420,9 +420,35 @@ static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn, return true; } +static struct tee_shm_pool *optee_config_dyn_shm(void) +{ + struct tee_shm_pool_mgr *priv_mgr; + struct tee_shm_pool_mgr *dmabuf_mgr; + void *rc; + + rc = optee_shm_pool_alloc_pages(); + if (IS_ERR(rc)) + return rc; + priv_mgr = rc; + + rc = optee_shm_pool_alloc_pages(); + if (IS_ERR(rc)) { + tee_shm_pool_mgr_destroy(priv_mgr); + return rc; + } + dmabuf_mgr = rc; + + rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); + if (IS_ERR(rc)) { + tee_shm_pool_mgr_destroy(priv_mgr); + tee_shm_pool_mgr_destroy(dmabuf_mgr); + } + + return rc; +} + static struct tee_shm_pool * -optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm, - u32 sec_caps) +optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm) { union { struct arm_smccc_res smccc; @@ -437,10 +463,11 @@ optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm, struct tee_shm_pool_mgr *priv_mgr; struct tee_shm_pool_mgr *dmabuf_mgr; void *rc; + const int sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE; invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc); if (res.result.status != OPTEE_SMC_RETURN_OK) { - pr_info("shm service not available\n"); + pr_err("static shm service not available\n"); return ERR_PTR(-ENOENT); } @@ -466,28 +493,15 @@ optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm, } vaddr = (unsigned long)va; - /* - * If OP-TEE can work with unregistered SHM, we will use own pool - * for private shm - */ - if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) { - rc = optee_shm_pool_alloc_pages(); - if (IS_ERR(rc)) - goto err_memunmap; - priv_mgr = rc; - } else { - const size_t sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE; - - rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz, - 3 /* 8 bytes aligned */); - if (IS_ERR(rc)) - goto err_memunmap; - priv_mgr = rc; - - vaddr += sz; - paddr += sz; - size -= sz; - } + rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz, + 3 /* 8 bytes aligned */); + if (IS_ERR(rc)) + goto err_memunmap; + priv_mgr = rc; + + vaddr += sz; + paddr += sz; + size -= sz; rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, size, PAGE_SHIFT); if (IS_ERR(rc)) @@ -553,7 +567,7 @@ static optee_invoke_fn *get_invoke_func(struct device_node *np) static struct optee *optee_probe(struct device_node *np) { optee_invoke_fn *invoke_fn; - struct tee_shm_pool *pool; + struct tee_shm_pool *pool = ERR_PTR(-EINVAL); struct optee *optee = NULL; void *memremaped_shm = NULL; struct tee_device *teedev; @@ -582,13 +596,17 @@ static struct optee *optee_probe(struct device_node *np) } /* - * We have no other option for shared memory, if secure world - * doesn't have any reserved memory we can use we can't continue. + * Try to use dynamic shared memory if possible */ - if (!(sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM)) - return ERR_PTR(-EINVAL); + if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) + pool = optee_config_dyn_shm(); + + /* + * If dynamic shared memory is not available or failed - try static one + */ + if (IS_ERR(pool) && (sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM)) + pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm); - pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm, sec_caps); if (IS_ERR(pool)) return (void *)pool; @@ -632,9 +650,6 @@ static struct optee *optee_probe(struct device_node *np) optee_enable_shm_cache(optee); - if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) - pr_info("dynamic shared memory is enabled\n"); - pr_info("initialized driver\n"); return optee; err: -- 2.7.4

4 years, 5 months

[PATCH v3 00/11] TEE mediator (and OP-TEE) support in XEN

by Volodymyr Babchuk

From: Volodymyr Babchuk <vlad.babchuk(a)gmail.com> Hello all, Sorry for late submussion. I was busy with other projects. Global changes from v2: - Use domain flags insted of domctl interface to enable optee for guests - Remove patch "libxc: add xc_dom_tee_enable(...) function" because of previous change - Mediator now stores own context in arch part of struct domain, so I removed patch "optee: add domain contexts" Per-patch changes are described in corresponding emails. ==== v2: This is v2 of patch series for OP-TEE mediator support in XEN. Changes from v1: - Added domctl interface, so now xl decides what domain should work with TEE - Removed XSM support due to change described above - Patch with OP-TEE mediator was splited to 7 separate patches - Removed patch with call_smccc() function. Now this series depend on Julien Grall's series "xen/arm: SMCCC fixup and improvement" [3] ===== v1: This is follow for patch series [1]. There was lots of discussions for that series and I tried to address all of them in this new patchset. Currently, I had a working solution for OP-TEE virtualization and it is being upstreamed right now ([2]). So, I think it is a good time to introduce support in XEN as well. This series include generic TEE mediator framework and full-scale OP-TEE mediator which is working with mentioned chages in OP-TEE. So, multiple domains can work simultaneously with OP-TEE. I added XSM support, so now it is possible to control which domains can work with TEEs. Also I changed way how TEE discovery is done. Now it is very generic and should support any platform. [1] https://lists.xenproject.org/archives/html/xen-devel/2017-10/msg01451.html [2] https://github.com/OP-TEE/optee_os/pull/2370 [3] https://lists.xenproject.org/archives/html/xen-devel/2018-08/msg02138.html Volodymyr Babchuk (11): arm: add generic TEE mediator framework arm: add tee_enabled flag to xen_arch_domainconfig arm: tee: add OP-TEE header files optee: add OP-TEE mediator skeleton optee: add fast calls handling optee: add std call handling optee: add support for RPC SHM buffers optee: add support for arbitrary shared memory optee: add support for RPC commands xl: add "tee" option for xl.cfg libxl: arm: create optee firmware node in DT if tee=1 MAINTAINERS | 6 + docs/man/xl.cfg.pod.5.in | 10 + tools/libxl/libxl_arm.c | 31 + tools/libxl/libxl_create.c | 1 + tools/libxl/libxl_types.idl | 1 + tools/xl/xl_parse.c | 1 + xen/arch/arm/Kconfig | 9 + xen/arch/arm/Makefile | 1 + xen/arch/arm/domain.c | 8 + xen/arch/arm/domain_build.c | 4 + xen/arch/arm/domctl.c | 1 + xen/arch/arm/setup.c | 1 + xen/arch/arm/shutdown.c | 1 + xen/arch/arm/tee/Kconfig | 4 + xen/arch/arm/tee/Makefile | 2 + xen/arch/arm/tee/optee.c | 1054 +++++++++++++++++++++++++++ xen/arch/arm/tee/tee.c | 69 ++ xen/arch/arm/vsmc.c | 5 + xen/arch/arm/xen.lds.S | 7 + xen/include/asm-arm/domain.h | 3 + xen/include/asm-arm/tee/optee_msg.h | 444 +++++++++++ xen/include/asm-arm/tee/optee_smc.h | 507 +++++++++++++ xen/include/asm-arm/tee/tee.h | 91 +++ xen/include/public/arch-arm.h | 3 + 24 files changed, 2264 insertions(+) create mode 100644 xen/arch/arm/tee/Kconfig create mode 100644 xen/arch/arm/tee/Makefile create mode 100644 xen/arch/arm/tee/optee.c create mode 100644 xen/arch/arm/tee/tee.c create mode 100644 xen/include/asm-arm/tee/optee_msg.h create mode 100644 xen/include/asm-arm/tee/optee_smc.h create mode 100644 xen/include/asm-arm/tee/tee.h -- 2.20.0

5 years, 1 month

[PATCH v1 0/2] Add OP-TEE based hwrng driver

by Sumit Garg

On ARM SoC's with TrustZone enabled, peripherals like entropy sources might not be accessible to normal world (linux in this case) and rather accessible to secure world (OP-TEE in this case) only. So this driver aims to provides a generic interface to OP-TEE based random number generator service. Example case is Developerbox based on Socionext's Synquacer SoC [1] which provides 7 thermal sensors accessible from secure world only which could be used as entropy sources (thermal/measurement noise). [1] https://www.96boards.org/product/developerbox/ Sumit Garg (2): dt/bindings: add bindings for optional optee rng-uuid property hwrng: add OP-TEE based rng driver .../bindings/arm/firmware/linaro,optee-tz.txt | 4 + MAINTAINERS | 5 + drivers/char/hw_random/Kconfig | 15 ++ drivers/char/hw_random/Makefile | 1 + drivers/char/hw_random/optee-rng.c | 273 +++++++++++++++++++++ 5 files changed, 298 insertions(+) create mode 100644 drivers/char/hw_random/optee-rng.c -- 2.7.4

5 years, 3 months

[PATCH v1 1/1] ArmPkg/OpteeLib: Add dummy RPC handler

by Sumit Garg

Add dummy RPC handler for RPCs that are not implemented as control should be returned back to OP-TEE in case any RPC is invoked. Cc: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Cc: Leif Lindholm <leif.lindholm(a)linaro.org> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Sumit Garg <sumit.garg(a)linaro.org> --- ArmPkg/Library/OpteeLib/OpteeSmc.h | 3 ++ ArmPkg/Library/OpteeLib/Optee.c | 34 ++++++++++++++++---- 2 files changed, 30 insertions(+), 7 deletions(-) diff --git a/ArmPkg/Library/OpteeLib/OpteeSmc.h b/ArmPkg/Library/OpteeLib/OpteeSmc.h index 9cccd81810c9..6209782aaed7 100644 --- a/ArmPkg/Library/OpteeLib/OpteeSmc.h +++ b/ArmPkg/Library/OpteeLib/OpteeSmc.h @@ -25,6 +25,9 @@ #define OPTEE_SMC_SHARED_MEMORY_CACHED 1 +#define OPTEE_SMC_RETURN_UNKNOWN_FUNCTION 0xffffffff +#define OPTEE_SMC_RETURN_RPC_PREFIX_MASK 0xffff0000 +#define OPTEE_SMC_RETURN_RPC_PREFIX 0xffff0000 #define OPTEE_SMC_RETURN_RPC_FOREIGN_INTERRUPT 0xffff0004 #define OPTEE_MESSAGE_COMMAND_OPEN_SESSION 0 diff --git a/ArmPkg/Library/OpteeLib/Optee.c b/ArmPkg/Library/OpteeLib/Optee.c index 55dcc7853b59..ed2a03c593c2 100644 --- a/ArmPkg/Library/OpteeLib/Optee.c +++ b/ArmPkg/Library/OpteeLib/Optee.c @@ -123,6 +123,17 @@ OpteeInit ( return EFI_SUCCESS; } +STATIC +BOOLEAN +IsOpteeSmcReturnRpc ( + UINT32 Return + ) +{ + return (Return != OPTEE_SMC_RETURN_UNKNOWN_FUNCTION) && + ((Return & OPTEE_SMC_RETURN_RPC_PREFIX_MASK) == + OPTEE_SMC_RETURN_RPC_PREFIX); +} + /** Does Standard SMC to OP-TEE in secure world. @@ -147,13 +158,22 @@ OpteeCallWithArg ( while (TRUE) { ArmCallSmc (&ArmSmcArgs); - if (ArmSmcArgs.Arg0 == OPTEE_SMC_RETURN_RPC_FOREIGN_INTERRUPT) { - // - // A foreign interrupt was raised while secure world was - // executing, since they are handled in UEFI a dummy RPC is - // performed to let UEFI take the interrupt through the normal - // vector. - // + if (IsOpteeSmcReturnRpc (ArmSmcArgs.Arg0)) { + switch (ArmSmcArgs.Arg0) { + case OPTEE_SMC_RETURN_RPC_FOREIGN_INTERRUPT: + // + // A foreign interrupt was raised while secure world was + // executing, since they are handled in UEFI a dummy RPC is + // performed to let UEFI take the interrupt through the normal + // vector. + // + break; + + default: + // Do nothing in case RPC is not implemented. + break; + } + ArmSmcArgs.Arg0 = OPTEE_SMC_RETURN_FROM_RPC; } else { break; -- 2.7.4

5 years, 4 months

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Tee-dev December 2018