- OP-TEE - lists.trustedfirmware.org

[PATCH v8 0/4] tee: introduce TEE system session

by Etienne Carriere

This series introduces TEE system sessions for TEE service sessions that require TEE to provision resources to prevent deadlock when clients call the TEE. This deadlock situation can happen when a TEE service is used by low level system resources as for example when Linux kernel uses SCMI service embedded in TEE for clock, reset, regulator, etc... controls. This case is detailled in patch 3/4: > This feature is needed to prevent a system deadlock when several TEE > client applications invoke TEE, consuming all TEE thread contexts > available in the secure world. The deadlock can happen in the OP-TEE > driver for example if all these TEE threads issue an RPC call from TEE > to Linux OS to access an eMMC RPMB partition (TEE secure storage) which > device clock or regulator controller is accessed through an OP-TEE SCMI > services. In that case, Linux SCMI driver must reach OP-TEE SCMI > service without waiting until one of the consumed TEE threads is freed. Etienne Carriere (4): tee: optee: system call property tee: system session tee: optee: support tracking system threads firmware: arm_scmi: optee: use optee system invocation drivers/firmware/arm_scmi/optee.c | 4 + drivers/tee/optee/call.c | 155 +++++++++++++++++++++++++++--- drivers/tee/optee/core.c | 5 +- drivers/tee/optee/ffa_abi.c | 13 +-- drivers/tee/optee/optee_private.h | 39 +++++++- drivers/tee/optee/smc_abi.c | 31 ++++-- drivers/tee/tee_core.c | 8 ++ include/linux/tee_drv.h | 16 +++ 8 files changed, 235 insertions(+), 36 deletions(-) --- No change since v7 Changes since v6: - Added this cover letter missing in previous patch series revisions. -- 2.25.1

1 year, 4 months

2
7
0 0

[PATCH v6 1/4] tee: optee: system call property

by Etienne Carriere

Adds an argument to do_call_with_arg() handler to tell whether the call is a system call or nor. This change always sets this info to false hence no functional change. This change prepares management of system invocation proposed in a later change. Co-developed-by: Jens Wiklander <jens.wiklander(a)linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander(a)linaro.org> Signed-off-by: Etienne Carriere <etienne.carriere(a)linaro.org> --- No changes since v5 Changes since v4: - New change, extracted from PATCH v4 1/2 (tee: system invocation") and revised to cover preparatory changes in optee driver for system session support with contribution from Jens. --- drivers/tee/optee/call.c | 22 ++++++++++++++++------ drivers/tee/optee/core.c | 5 +++-- drivers/tee/optee/ffa_abi.c | 3 ++- drivers/tee/optee/optee_private.h | 7 +++++-- drivers/tee/optee/smc_abi.c | 9 +++++---- 5 files changed, 31 insertions(+), 15 deletions(-) diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index df5fb5410b72..dba5339b61ae 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -328,7 +328,8 @@ int optee_open_session(struct tee_context *ctx, goto out; } - if (optee->ops->do_call_with_arg(ctx, shm, offs)) { + if (optee->ops->do_call_with_arg(ctx, shm, offs, + sess->use_sys_thread)) { msg_arg->ret = TEEC_ERROR_COMMUNICATION; msg_arg->ret_origin = TEEC_ORIGIN_COMMS; } @@ -360,7 +361,8 @@ int optee_open_session(struct tee_context *ctx, return rc; } -int optee_close_session_helper(struct tee_context *ctx, u32 session) +int optee_close_session_helper(struct tee_context *ctx, u32 session, + bool system_thread) { struct optee *optee = tee_get_drvdata(ctx->teedev); struct optee_shm_arg_entry *entry; @@ -374,7 +376,7 @@ int optee_close_session_helper(struct tee_context *ctx, u32 session) msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION; msg_arg->session = session; - optee->ops->do_call_with_arg(ctx, shm, offs); + optee->ops->do_call_with_arg(ctx, shm, offs, system_thread); optee_free_msg_arg(ctx, entry, offs); @@ -385,6 +387,7 @@ int optee_close_session(struct tee_context *ctx, u32 session) { struct optee_context_data *ctxdata = ctx->data; struct optee_session *sess; + bool system_thread; /* Check that the session is valid and remove it from the list */ mutex_lock(&ctxdata->mutex); @@ -394,9 +397,10 @@ int optee_close_session(struct tee_context *ctx, u32 session) mutex_unlock(&ctxdata->mutex); if (!sess) return -EINVAL; + system_thread = sess->use_sys_thread; kfree(sess); - return optee_close_session_helper(ctx, session); + return optee_close_session_helper(ctx, session, system_thread); } int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, @@ -408,12 +412,15 @@ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, struct optee_msg_arg *msg_arg; struct optee_session *sess; struct tee_shm *shm; + bool system_thread; u_int offs; int rc; /* Check that the session is valid */ mutex_lock(&ctxdata->mutex); sess = find_session(ctxdata, arg->session); + if (sess) + system_thread = sess->use_sys_thread; mutex_unlock(&ctxdata->mutex); if (!sess) return -EINVAL; @@ -432,7 +439,7 @@ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, if (rc) goto out; - if (optee->ops->do_call_with_arg(ctx, shm, offs)) { + if (optee->ops->do_call_with_arg(ctx, shm, offs, system_thread)) { msg_arg->ret = TEEC_ERROR_COMMUNICATION; msg_arg->ret_origin = TEEC_ORIGIN_COMMS; } @@ -457,12 +464,15 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session) struct optee_shm_arg_entry *entry; struct optee_msg_arg *msg_arg; struct optee_session *sess; + bool system_thread; struct tee_shm *shm; u_int offs; /* Check that the session is valid */ mutex_lock(&ctxdata->mutex); sess = find_session(ctxdata, session); + if (sess) + system_thread = sess->use_sys_thread; mutex_unlock(&ctxdata->mutex); if (!sess) return -EINVAL; @@ -474,7 +484,7 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session) msg_arg->cmd = OPTEE_MSG_CMD_CANCEL; msg_arg->session = session; msg_arg->cancel_id = cancel_id; - optee->ops->do_call_with_arg(ctx, shm, offs); + optee->ops->do_call_with_arg(ctx, shm, offs, system_thread); optee_free_msg_arg(ctx, entry, offs); return 0; diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index 2a258bd3b6b5..d01ca47f7bde 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -129,7 +129,8 @@ int optee_open(struct tee_context *ctx, bool cap_memref_null) static void optee_release_helper(struct tee_context *ctx, int (*close_session)(struct tee_context *ctx, - u32 session)) + u32 session, + bool system_thread)) { struct optee_context_data *ctxdata = ctx->data; struct optee_session *sess; @@ -141,7 +142,7 @@ static void optee_release_helper(struct tee_context *ctx, list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list, list_node) { list_del(&sess->list_node); - close_session(ctx, sess->session_id); + close_session(ctx, sess->session_id, sess->use_sys_thread); kfree(sess); } kfree(ctxdata); diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c index 0828240f27e6..52cec9d06041 100644 --- a/drivers/tee/optee/ffa_abi.c +++ b/drivers/tee/optee/ffa_abi.c @@ -612,7 +612,8 @@ static int optee_ffa_yielding_call(struct tee_context *ctx, */ static int optee_ffa_do_call_with_arg(struct tee_context *ctx, - struct tee_shm *shm, u_int offs) + struct tee_shm *shm, u_int offs, + bool system_thread) { struct ffa_send_direct_data data = { .data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG, diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index 72685ee0d53f..3da7960ab34a 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -154,7 +154,8 @@ struct optee; */ struct optee_ops { int (*do_call_with_arg)(struct tee_context *ctx, - struct tee_shm *shm_arg, u_int offs); + struct tee_shm *shm_arg, u_int offs, + bool system_thread); int (*to_msg_param)(struct optee *optee, struct optee_msg_param *msg_params, size_t num_params, const struct tee_param *params); @@ -204,6 +205,7 @@ struct optee { struct optee_session { struct list_head list_node; u32 session_id; + bool use_sys_thread; }; struct optee_context_data { @@ -252,7 +254,8 @@ int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params, int optee_open_session(struct tee_context *ctx, struct tee_ioctl_open_session_arg *arg, struct tee_param *param); -int optee_close_session_helper(struct tee_context *ctx, u32 session); +int optee_close_session_helper(struct tee_context *ctx, u32 session, + bool system_thread); int optee_close_session(struct tee_context *ctx, u32 session); int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, struct tee_param *param); diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c index 49702cb08f4f..56ebbb96ac97 100644 --- a/drivers/tee/optee/smc_abi.c +++ b/drivers/tee/optee/smc_abi.c @@ -507,7 +507,7 @@ static int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm, msg_arg->params->u.tmem.buf_ptr = virt_to_phys(pages_list) | (tee_shm_get_page_offset(shm) & (OPTEE_MSG_NONCONTIG_PAGE_SIZE - 1)); - if (optee->ops->do_call_with_arg(ctx, shm_arg, 0) || + if (optee->ops->do_call_with_arg(ctx, shm_arg, 0, false) || msg_arg->ret != TEEC_SUCCESS) rc = -EINVAL; @@ -550,7 +550,7 @@ static int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm) msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT; msg_arg->params[0].u.rmem.shm_ref = (unsigned long)shm; - if (optee->ops->do_call_with_arg(ctx, shm_arg, 0) || + if (optee->ops->do_call_with_arg(ctx, shm_arg, 0, false) || msg_arg->ret != TEEC_SUCCESS) rc = -EINVAL; out: @@ -885,7 +885,8 @@ static void optee_handle_rpc(struct tee_context *ctx, * Returns return code from secure world, 0 is OK */ static int optee_smc_do_call_with_arg(struct tee_context *ctx, - struct tee_shm *shm, u_int offs) + struct tee_shm *shm, u_int offs, + bool system_thread) { struct optee *optee = tee_get_drvdata(ctx->teedev); struct optee_call_waiter w; @@ -977,7 +978,7 @@ static int simple_call_with_arg(struct tee_context *ctx, u32 cmd) return PTR_ERR(msg_arg); msg_arg->cmd = cmd; - optee_smc_do_call_with_arg(ctx, shm, offs); + optee_smc_do_call_with_arg(ctx, shm, offs, false); optee_free_msg_arg(ctx, entry, offs); return 0; -- 2.25.1

1 year, 4 months

2
22
0 0

[PATCH] plat-rzn1: increase DDR size to 1GB

by Ralph Siemsen

There are now some RZ/N1 devices with 1GB rather than 256MB. The first-stage bootloader does not support passing a DT to OP-TEE, so static values are set at compile time. Increase the DDR size so as to avoid OP-TEE calls failing with TEEC_ERROR_OUT_OF_MEMORY. Signed-off-by: Ralph Siemsen <ralph.siemsen(a)linaro.org> --- core/arch/arm/plat-rzn1/platform_config.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/core/arch/arm/plat-rzn1/platform_config.h b/core/arch/arm/plat-rzn1/platform_config.h index a6340bb33..eb709c62f 100644 --- a/core/arch/arm/plat-rzn1/platform_config.h +++ b/core/arch/arm/plat-rzn1/platform_config.h @@ -11,7 +11,7 @@ /* DRAM */ #define DRAM_BASE 0x80000000 -#define DRAM_SIZE 0x10000000 +#define DRAM_SIZE 0x40000000 /* GIC */ #define GIC_BASE 0x44100000 -- 2.25.1

1 year, 4 months

3
3
0 0

[PATCH v7 0/4] tee: introduce TEE system session

by Etienne Carriere

This series introduces TEE system sessions for TEE service sessions that require TEE to provision resources to prevent deadlock when clients call the TEE. This deadlock situation can happen when a TEE service is used by low level system resources as for example when Linux kernel uses SCMI service embedded in TEE for clock, reset, regulator, etc... controls. This case is detailled in patch 3/4: > This feature is needed to prevent a system deadlock when several TEE > client applications invoke TEE, consuming all TEE thread contexts > available in the secure world. The deadlock can happen in the OP-TEE > driver for example if all these TEE threads issue an RPC call from TEE > to Linux OS to access an eMMC RPMB partition (TEE secure storage) which > device clock or regulator controller is accessed through an OP-TEE SCMI > services. In that case, Linux SCMI driver must reach OP-TEE SCMI > service without waiting until one of the consumed TEE threads is freed. Etienne Carriere (4): tee: optee: system call property tee: system session tee: optee: support tracking system threads firmware: arm_scmi: optee: use optee system invocation drivers/firmware/arm_scmi/optee.c | 4 + drivers/tee/optee/call.c | 150 +++++++++++++++++++++++++++--- drivers/tee/optee/core.c | 5 +- drivers/tee/optee/ffa_abi.c | 13 +-- drivers/tee/optee/optee_private.h | 20 +++- drivers/tee/optee/smc_abi.c | 31 ++++-- drivers/tee/tee_core.c | 8 ++ include/linux/tee_drv.h | 16 ++++ 8 files changed, 211 insertions(+), 36 deletions(-) --- Changes since v6: - Added this cover letter missing in previous patch series revisions. -- 2.25.1

1 year, 4 months

1
4
0 0

[PATCH 1/1] tee: amdtee: Add return_origin to 'struct tee_cmd_load_ta'

by Rijo Thomas

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(a)vger.kernel.org Tested-by: Sourabh Das <sourabh.das(a)amd.com> Signed-off-by: Rijo Thomas <Rijo-john.Thomas(a)amd.com> --- drivers/tee/amdtee/amdtee_if.h | 10 ++++++---- drivers/tee/amdtee/call.c | 30 +++++++++++++++++------------- 2 files changed, 23 insertions(+), 17 deletions(-) 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

1 year, 4 months

2
2
0 0

Calling tee_invoke_supp_plugin_rpc() with exceptions masked

by Jacob Kroon

Hi, I'm wondering if it is safe to call tee_invoke_supp_plugin_rpc() from within the OP-TEE kernel with both foreign and/or native exceptions masked ? Regards, Jacob

1 year, 4 months

3
3
0 0

Cannot upload changes for review

by Ruth Glushkin

Hi, bash-4.2$ git push Enumerating objects: 22, done. Counting objects: 100% (22/22), done. Delta compression using up to 40 threads Compressing objects: 100% (17/17), done. Writing objects: 100% (18/18), 5.66 KiB | 579.00 KiB/s, done. Total 18 (delta 3), reused 0 (delta 0), pack-reused 0 remote: Resolving deltas: 100% (3/3) remote: error: branch refs/heads/integration: remote: To push into this reference you need 'Push' rights. remote: User: rutigl remote: Contact an administrator to fix the permissions remote: Processing changes: refs: 1, done To https://review.trustedfirmware.org/OP-TEE/optee_os ! [remote rejected] integration -> integration (prohibited by Gerrit: not permitted: update) error: failed to push some refs to 'https://review.trustedfirmware.org/OP-TEE/optee_os' Thank you in advance for assistance. Margarita Glushkin

1 year, 5 months

2
1
0 0

[PATCH] optee: fix uninited async notif value

by Etienne Carriere

Fixes an uninitialized variable in irq_handler() that could lead to unpredictable behavior in case OP-TEE fails to handle SMC function ID OPTEE_SMC_GET_ASYNC_NOTIF_VALUE. This change ensures that in that case get_async_notif_value() properly reports there are no notification event. Reported-by: kernel test robot <lkp(a)intel.com> Link: https://lore.kernel.org/r/202304200755.OoiuclDZ-lkp@intel.com/ Reported-by: Dan Carpenter <error27(a)gmail.com> Link: https://lore.kernel.org/all/d9b7f69b-c737-4cb3-8e74-79fe00c934f9@kili.mount… Fixes: 6749e69c4dad ("optee: add asynchronous notifications") Signed-off-by: Etienne Carriere <etienne.carriere(a)linaro.org> --- drivers/tee/optee/smc_abi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c index de7ac9a46354..6d3705770755 100644 --- a/drivers/tee/optee/smc_abi.c +++ b/drivers/tee/optee/smc_abi.c @@ -1001,8 +1001,10 @@ static u32 get_async_notif_value(optee_invoke_fn *invoke_fn, bool *value_valid, invoke_fn(OPTEE_SMC_GET_ASYNC_NOTIF_VALUE, 0, 0, 0, 0, 0, 0, 0, &res); - if (res.a0) + if (res.a0) { + *value_valid = false; return 0; + } *value_valid = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID); *value_pending = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING); return res.a1; -- 2.25.1

1 year, 5 months

2
1
0 0

[linux-next:master] BUILD REGRESSION 3cdbc01c40e34c57697f8934f2727a88551696be

by kernel test robot

tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master branch HEAD: 3cdbc01c40e34c57697f8934f2727a88551696be Add linux-next specific files for 20230419 Error/Warning reports: https://lore.kernel.org/oe-kbuild-all/202304102354.Q4VOXGTE-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202304200812.6UqNDVZy-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202304201027.2upm4i0C-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202304201216.YgbKeHUJ-lkp@intel.com Error/Warning: (recently discovered and may have been fixed) drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:184:19: warning: variable 'dmub' set but not used [-Wunused-but-set-variable] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c:138:15: warning: variable 'feature_support' set but not used [-Wunused-but-set-variable] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:124:14: warning: no previous prototype for function 'dmub_abm_get_current_backlight' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:135:14: warning: no previous prototype for function 'dmub_abm_get_target_backlight' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:146:6: warning: no previous prototype for function 'dmub_abm_set_level' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:167:6: warning: no previous prototype for function 'dmub_abm_set_ambient_level' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:189:6: warning: no previous prototype for function 'dmub_abm_init_config' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:221:6: warning: no previous prototype for function 'dmub_abm_set_pause' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:241:6: warning: no previous prototype for function 'dmub_abm_set_pipe' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:263:6: warning: no previous prototype for function 'dmub_abm_set_backlight_level' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:83:6: warning: no previous prototype for function 'dmub_abm_init' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c:351:13: warning: variable 'bw_needed' set but not used [-Wunused-but-set-variable] drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c:352:25: warning: variable 'link' set but not used [-Wunused-but-set-variable] drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c:451:16: warning: variable 'j' set but not used [-Wunused-but-set-variable] drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:1049:6: warning: no previous prototype for 'gfx_v9_4_3_disable_gpa_mode' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:1049:6: warning: no previous prototype for function 'gfx_v9_4_3_disable_gpa_mode' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:1072:6: warning: no previous prototype for 'gfx_v9_4_3_disable_gpa_mode' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c:48:38: warning: unused variable 'golden_settings_gc_9_4_3' [-Wunused-const-variable] drivers/gpu/drm/i915/gt/uc/guc_capture_fwif.h:62: warning: wrong kernel-doc identifier on line: drivers/gpu/drm/i915/i915_pmu.h:41: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst drivers/gpu/drm/i915/i915_request.h:176: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst drivers/gpu/drm/i915/i915_vma.h:145: warning: expecting prototype for i915_vma_offset(). Prototype was for i915_vma_size() instead drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:298:6: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] ld.lld: error: .btf.vmlinux.bin.o: unknown file type phy-mtk-hdmi-mt8195.c:(.text+0x2e2): undefined reference to `__floatundidf' phy-mtk-hdmi-mt8195.c:(.text+0x2f4): undefined reference to `__ltdf2' phy-mtk-hdmi-mt8195.c:(.text+0x344): undefined reference to `__gedf2' riscv64-linux-ld: phy-mtk-hdmi-mt8195.c:(.text+0x312): undefined reference to `__gedf2' riscv64-linux-ld: phy-mtk-hdmi-mt8195.c:(.text+0x32c): undefined reference to `__ltdf2' Unverified Error/Warning (likely false positive, please contact us if interested): drivers/acpi/property.c:985 acpi_data_prop_read_single() error: potentially dereferencing uninitialized 'obj'. drivers/firmware/smccc/smccc.c:20:21: sparse: sparse: symbol 'smccc_soc_id_version' was not declared. Should it be static? drivers/firmware/smccc/smccc.c:21:21: sparse: sparse: symbol 'smccc_soc_id_revision' was not declared. Should it be static? drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:240 mtk_hdmi_pll_calc() warn: impossible condition '(tmds_clk < 1.483500e+02 * 1000000) => (0.000000e+00-1.844674e+19 < -1.786711e-113)' drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:242 mtk_hdmi_pll_calc() warn: always true condition '(tmds_clk >= 1.483500e+02 * 1000000) => (0-u64max >= -1.786711e-113)' drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:242 mtk_hdmi_pll_calc() warn: impossible condition '(tmds_clk < 2.967000e+02 * 1000000) => (0.000000e+00-1.844674e+19 < -4.419080e+60)' drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:244 mtk_hdmi_pll_calc() warn: always true condition '(tmds_clk >= 2.967000e+02 * 1000000) => (0-u64max >= -4.419080e+60)' drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:298 mtk_hdmi_pll_calc() error: uninitialized symbol 'ret'. drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:331 mtk_hdmi_pll_drv_setting() warn: always true condition '(pixel_clk >= 7.417500e+01 * 1000000) => (0-u32max >= -7.223985e-287)' drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c:336 mtk_hdmi_pll_drv_setting() warn: impossible condition '(pixel_clk < 7.417500e+01 * 1000000) => (0.000000e+00-4.294967e+09 < -7.223985e-287)' drivers/tee/optee/smc_abi.c:1021 irq_handler() error: uninitialized symbol 'value_valid'. drivers/tee/optee/smc_abi.c:1028 irq_handler() error: uninitialized symbol 'value_pending'. fs/xfs/scrub/refcount.c: xfs_mount.h is included more than once. fs/xfs/scrub/refcount.c: xfs_trans_resv.h is included more than once. Error/Warning ids grouped by kconfigs: gcc_recent_errors |-- alpha-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- alpha-randconfig-r001-20230420 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- alpha-randconfig-r023-20230420 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- arc-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- arc-buildonly-randconfig-r004-20230419 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- arc-randconfig-r043-20230420 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- arm-allmodconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- arm-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- arm64-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- arm64-randconfig-m041-20230419 | |-- drivers-tee-optee-smc_abi.c-irq_handler()-error:uninitialized-symbol-value_pending-. | `-- drivers-tee-optee-smc_abi.c-irq_handler()-error:uninitialized-symbol-value_valid-. |-- arm64-randconfig-r003-20230417 | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- arm64-randconfig-s031-20230416 | |-- drivers-firmware-smccc-smccc.c:sparse:sparse:symbol-smccc_soc_id_revision-was-not-declared.-Should-it-be-static | `-- drivers-firmware-smccc-smccc.c:sparse:sparse:symbol-smccc_soc_id_version-was-not-declared.-Should-it-be-static |-- csky-randconfig-m041-20230419 | |-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c-mtk_hdmi_pll_calc()-error:uninitialized-symbol-ret-. | |-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c-mtk_hdmi_pll_calc()-warn:always-true-condition-(tmds_clk-.483500e-)-(-u64max-.786711e-) | |-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c-mtk_hdmi_pll_calc()-warn:always-true-condition-(tmds_clk-.967000e-)-(-u64max-.419080e-) | |-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c-mtk_hdmi_pll_calc()-warn:impossible-condition-(tmds_clk-.483500e-)-(.000000e-.844674e-.786711e-) | |-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c-mtk_hdmi_pll_calc()-warn:impossible-condition-(tmds_clk-.967000e-)-(.000000e-.844674e-.419080e-) | |-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c-mtk_hdmi_pll_drv_setting()-warn:always-true-condition-(pixel_clk-.417500e-)-(-u32max-.223985e-) | `-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c-mtk_hdmi_pll_drv_setting()-warn:impossible-condition-(pixel_clk-.417500e-)-(.000000e-.294967e-.223985e-) |-- csky-randconfig-r024-20230417 | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- i386-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- i386-randconfig-m021-20230417 | `-- drivers-acpi-property.c-acpi_data_prop_read_single()-error:potentially-dereferencing-uninitialized-obj-. |-- ia64-allmodconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- ia64-randconfig-r034-20230416 | |-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-gfx_v9_4_3_disable_gpa_mode |-- ia64-randconfig-s043-20230416 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-gfx_v9_4_3_disable_gpa_mode |-- loongarch-allmodconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- loongarch-defconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- microblaze-randconfig-m041-20230416 | |-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-gfx_v9_4_3_disable_gpa_mode |-- microblaze-randconfig-r004-20230420 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- mips-allmodconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- mips-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- mips-randconfig-c003-20230420 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-gfx_v9_4_3_disable_gpa_mode |-- mips-randconfig-s041-20230416 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:sparse:sparse:cast-truncates-bits-from-constant-value-(ffff-becomes-ff) | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- openrisc-randconfig-c003-20230416 | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- parisc-buildonly-randconfig-r003-20230419 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used |-- powerpc-allmodconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- riscv-allmodconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- riscv-randconfig-r016-20230416 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- riscv-randconfig-s052-20230416 | |-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-gfx_v9_4_3_disable_gpa_mode | |-- phy-mtk-hdmi-mt8195.c:(.text):undefined-reference-to-__floatundidf | |-- phy-mtk-hdmi-mt8195.c:(.text):undefined-reference-to-__gedf2 | |-- phy-mtk-hdmi-mt8195.c:(.text):undefined-reference-to-__ltdf2 | |-- riscv64-linux-ld:phy-mtk-hdmi-mt8195.c:(.text):undefined-reference-to-__gedf2 | `-- riscv64-linux-ld:phy-mtk-hdmi-mt8195.c:(.text):undefined-reference-to-__ltdf2 |-- s390-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used |-- sparc-allmodconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-gfx_v9_4_3_disable_gpa_mode |-- sparc64-randconfig-s053-20230416 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-amdgpu_gfx.c:warning:variable-j-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-gfx_v9_4_3_disable_gpa_mode |-- x86_64-allnoconfig | |-- fs-xfs-scrub-refcount.c:xfs_mount.h-is-included-more-than-once. | `-- fs-xfs-scrub-refcount.c:xfs_trans_resv.h-is-included-more-than-once. |-- x86_64-allyesconfig | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-bw_needed-set-but-not-used | `-- drivers-gpu-drm-amd-amdgpu-..-display-dc-link-link_validation.c:warning:variable-link-set-but-not-used `-- x86_64-randconfig-m001-20230417 `-- drivers-acpi-property.c-acpi_data_prop_read_single()-error:potentially-dereferencing-uninitialized-obj-. clang_recent_errors |-- arm64-buildonly-randconfig-r005-20230416 | `-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c:warning:variable-ret-is-uninitialized-when-used-here |-- arm64-randconfig-r015-20230417 | `-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c:warning:variable-ret-is-uninitialized-when-used-here |-- arm64-randconfig-r036-20230416 | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dc_dmub_srv.c:warning:variable-dmub-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm.c:warning:variable-feature_support-set-but-not-used | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_get_current_backlight | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_get_target_backlight | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_init | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_init_config | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_set_ambient_level | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_set_backlight_level | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_set_level | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_set_pause | |-- drivers-gpu-drm-amd-amdgpu-..-display-dc-dce-dmub_abm_lcd.c:warning:no-previous-prototype-for-function-dmub_abm_set_pipe | |-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:no-previous-prototype-for-function-gfx_v9_4_3_disable_gpa_mode | `-- drivers-gpu-drm-amd-amdgpu-gfx_v9_4_3.c:warning:unused-variable-golden_settings_gc_9_4_3 |-- hexagon-randconfig-r023-20230417 | `-- ld.lld:error:.btf.vmlinux.bin.o:unknown-file-type |-- hexagon-randconfig-r045-20230420 | `-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c:warning:variable-ret-is-uninitialized-when-used-here |-- mips-randconfig-r021-20230420 | `-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c:warning:variable-ret-is-uninitialized-when-used-here |-- riscv-buildonly-randconfig-r006-20230419 | `-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c:warning:variable-ret-is-uninitialized-when-used-here |-- riscv-randconfig-r032-20230416 | `-- drivers-phy-mediatek-phy-mtk-hdmi-mt8195.c:warning:variable-ret-is-uninitialized-when-used-here `-- x86_64-randconfig-a011-20230417 |-- drivers-gpu-drm-i915-gt-uc-guc_capture_fwif.h:warning:wrong-kernel-doc-identifier-on-line: |-- drivers-gpu-drm-i915-i915_pmu.h:warning:This-comment-starts-with-but-isn-t-a-kernel-doc-comment.-Refer-Documentation-doc-guide-kernel-doc.rst |-- drivers-gpu-drm-i915-i915_request.h:warning:This-comment-starts-with-but-isn-t-a-kernel-doc-comment.-Refer-Documentation-doc-guide-kernel-doc.rst `-- drivers-gpu-drm-i915-i915_vma.h:warning:expecting-prototype-for-i915_vma_offset().-Prototype-was-for-i915_vma_size()-instead elapsed time: 734m configs tested: 190 configs skipped: 20 tested configs: alpha allyesconfig gcc alpha buildonly-randconfig-r005-20230417 gcc alpha defconfig gcc alpha randconfig-r001-20230416 gcc alpha randconfig-r001-20230420 gcc alpha randconfig-r003-20230416 gcc alpha randconfig-r013-20230416 gcc alpha randconfig-r023-20230420 gcc arc allyesconfig gcc arc buildonly-randconfig-r002-20230418 gcc arc buildonly-randconfig-r004-20230417 gcc arc buildonly-randconfig-r004-20230419 gcc arc buildonly-randconfig-r006-20230416 gcc arc defconfig gcc arc randconfig-r043-20230416 gcc arc randconfig-r043-20230417 gcc arc randconfig-r043-20230419 gcc arc randconfig-r043-20230420 gcc arm allmodconfig gcc arm allyesconfig gcc arm at91_dt_defconfig gcc arm defconfig gcc arm ep93xx_defconfig clang arm hisi_defconfig gcc arm keystone_defconfig gcc arm omap1_defconfig clang arm randconfig-r006-20230416 gcc arm randconfig-r046-20230416 clang arm randconfig-r046-20230417 gcc arm randconfig-r046-20230419 gcc arm randconfig-r046-20230420 clang arm tegra_defconfig gcc arm64 allyesconfig gcc arm64 buildonly-randconfig-r004-20230418 clang arm64 buildonly-randconfig-r005-20230416 clang arm64 buildonly-randconfig-r005-20230419 gcc arm64 defconfig gcc arm64 randconfig-r003-20230417 gcc arm64 randconfig-r015-20230417 clang arm64 randconfig-r036-20230416 clang csky buildonly-randconfig-r004-20230416 gcc csky buildonly-randconfig-r006-20230418 gcc csky defconfig gcc csky randconfig-r024-20230417 gcc csky randconfig-r025-20230416 gcc csky randconfig-r026-20230420 gcc hexagon randconfig-r005-20230417 clang hexagon randconfig-r012-20230417 clang hexagon randconfig-r016-20230417 clang hexagon randconfig-r023-20230417 clang hexagon randconfig-r031-20230418 clang hexagon randconfig-r035-20230416 clang hexagon randconfig-r041-20230416 clang hexagon randconfig-r041-20230417 clang hexagon randconfig-r041-20230419 clang hexagon randconfig-r041-20230420 clang hexagon randconfig-r045-20230416 clang hexagon randconfig-r045-20230417 clang hexagon randconfig-r045-20230419 clang hexagon randconfig-r045-20230420 clang i386 allyesconfig gcc i386 debian-10.3 gcc i386 defconfig gcc i386 randconfig-a001-20230417 gcc i386 randconfig-a002-20230417 gcc i386 randconfig-a003-20230417 gcc i386 randconfig-a004-20230417 gcc i386 randconfig-a005-20230417 gcc i386 randconfig-a006-20230417 gcc i386 randconfig-a011-20230417 clang i386 randconfig-a012-20230417 clang i386 randconfig-a013-20230417 clang i386 randconfig-a014-20230417 clang i386 randconfig-a015-20230417 clang i386 randconfig-a016-20230417 clang i386 randconfig-r006-20230417 gcc ia64 allmodconfig gcc ia64 defconfig gcc ia64 randconfig-r022-20230416 gcc ia64 randconfig-r022-20230417 gcc ia64 randconfig-r026-20230416 gcc ia64 randconfig-r034-20230416 gcc ia64 randconfig-r036-20230418 gcc ia64 zx1_defconfig gcc loongarch allmodconfig gcc loongarch allnoconfig gcc loongarch defconfig gcc m68k allmodconfig gcc m68k atari_defconfig gcc m68k defconfig gcc m68k m5272c3_defconfig gcc microblaze buildonly-randconfig-r003-20230418 gcc microblaze randconfig-r004-20230420 gcc microblaze randconfig-r021-20230417 gcc mips allmodconfig gcc mips allyesconfig gcc mips cobalt_defconfig gcc mips decstation_64_defconfig gcc mips malta_qemu_32r6_defconfig clang mips omega2p_defconfig clang mips randconfig-r012-20230416 clang mips randconfig-r014-20230417 gcc mips randconfig-r021-20230420 clang mips randconfig-r034-20230418 gcc nios2 buildonly-randconfig-r006-20230417 gcc nios2 defconfig gcc nios2 randconfig-r002-20230417 gcc nios2 randconfig-r025-20230417 gcc openrisc buildonly-randconfig-r001-20230418 gcc openrisc buildonly-randconfig-r002-20230416 gcc openrisc randconfig-r011-20230417 gcc parisc buildonly-randconfig-r002-20230417 gcc parisc buildonly-randconfig-r003-20230419 gcc parisc defconfig gcc parisc randconfig-r021-20230416 gcc parisc randconfig-r023-20230416 gcc parisc randconfig-r024-20230416 gcc parisc64 defconfig gcc powerpc allmodconfig gcc powerpc allnoconfig gcc powerpc cm5200_defconfig gcc powerpc gamecube_defconfig clang powerpc klondike_defconfig gcc powerpc makalu_defconfig gcc powerpc mpc7448_hpc2_defconfig gcc powerpc rainier_defconfig gcc powerpc redwood_defconfig gcc powerpc skiroot_defconfig clang powerpc taishan_defconfig gcc powerpc wii_defconfig gcc riscv allmodconfig gcc riscv allnoconfig gcc riscv buildonly-randconfig-r003-20230416 gcc riscv buildonly-randconfig-r003-20230417 clang riscv buildonly-randconfig-r006-20230419 clang riscv defconfig gcc riscv randconfig-r005-20230416 clang riscv randconfig-r016-20230416 gcc riscv randconfig-r032-20230416 clang riscv randconfig-r032-20230418 clang riscv randconfig-r042-20230416 gcc riscv randconfig-r042-20230417 clang riscv randconfig-r042-20230419 clang riscv randconfig-r042-20230420 gcc riscv rv32_defconfig gcc s390 allmodconfig gcc s390 allyesconfig gcc s390 defconfig gcc s390 randconfig-r002-20230420 clang s390 randconfig-r003-20230420 clang s390 randconfig-r044-20230416 gcc s390 randconfig-r044-20230417 clang s390 randconfig-r044-20230419 clang s390 randconfig-r044-20230420 gcc sh allmodconfig gcc sh buildonly-randconfig-r001-20230416 gcc sh ecovec24_defconfig gcc sh r7785rp_defconfig gcc sh randconfig-r004-20230417 gcc sh randconfig-r011-20230416 gcc sh rsk7264_defconfig gcc sparc defconfig gcc sparc sparc32_defconfig gcc sparc64 buildonly-randconfig-r002-20230419 gcc sparc64 randconfig-r026-20230417 gcc um i386_defconfig gcc um x86_64_defconfig gcc x86_64 allnoconfig gcc x86_64 allyesconfig gcc x86_64 defconfig gcc x86_64 kexec gcc x86_64 randconfig-a001-20230417 gcc x86_64 randconfig-a002-20230417 gcc x86_64 randconfig-a003-20230417 gcc x86_64 randconfig-a004-20230417 gcc x86_64 randconfig-a005-20230417 gcc x86_64 randconfig-a006-20230417 gcc x86_64 randconfig-a011-20230417 clang x86_64 randconfig-a012-20230417 clang x86_64 randconfig-a013-20230417 clang x86_64 randconfig-a014-20230417 clang x86_64 randconfig-a015-20230417 clang x86_64 randconfig-a016-20230417 clang x86_64 rhel-8.3-bpf gcc x86_64 rhel-8.3-kunit gcc x86_64 rhel-8.3-kvm gcc x86_64 rhel-8.3-syz gcc x86_64 rhel-8.3 gcc xtensa randconfig-r015-20230416 gcc xtensa smp_lx200_defconfig gcc -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests

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fragment transmission while retrieving memory

by 梅建强(禹夜)

Hi, Jens, >The first is the descriptor passed with FFA_MEM_RETRIEVE_REQ_32, >this one is not likely to need fragmentation support soon. Could you tell me why? I'm a little unclear. Could you describe the difference between the retrieve process you mean and FFA-spec figure 18.4 in detail? I need to make sure that I really understand what you mean, so that I can implement the missing support for fragmented mem retrieve response as you said. Or do you mean that we just need to implement the action done by optee after it receives FFA_MEM_RETRIEVE_RESP_32? Regards, Yuye. ------------------------------------------------------------------ 发件人：Jens Wiklander <jens.wiklander(a)linaro.org> 发送时间：2023年4月14日(星期五) 14:23 收件人：梅建强(禹夜) <meijianqiang.mjq(a)alibaba-inc.com> 抄　送：Olivier Deprez <Olivier.Deprez(a)arm.com>; hafnium <hafnium(a)lists.trustedfirmware.org>; op-tee <op-tee(a)lists.trustedfirmware.org> 主　题：Re: fragment transmission while retrieving memory Hi Yuye, On Fri, Apr 14, 2023 at 4:29 AM 梅建强(禹夜) <meijianqiang.mjq(a)alibaba-inc.com> wrote: > > > Hi, Jens, Olivier, > > If I understand properly, for this specific issue both optee and hafnium need to do further fix. > The following discussion and questions are based on figure 18.4 in the FFA spec. > > As I saw in the optee code, the retrieve mechanism would start with this code: > retrieve_desc = spmc_retrieve_req(cookie); > And in the function spmc_retrieve_req, > optee sets the total length to the same size as fragment0 length before sending FFA_MEM_FRAG_REQ to hafnium, > which means hafnium will only retrieve the fragment0 memory region. > > In the example process, > optee will determines the number of TX sized fragments of descriptor before sending FFA_MEM_FRAG_REQ to hafnium. > I have a question here. > How should optee calculate this quantity? > > Hafnium then receives the FFA_MEM_FRAG_REQ. > As I saw in the hafnium code, hafnium blocks the case that total length>fragment length. > if (fragment_length != length) { > dlog_verbose("Fragmentation not yet supported.\n"); > return ffa_error(FFA_INVALID_PARAMETERS); > } > Obviously it is not what we expected. > Then following the example process, hafnium should allocate handle and use it to associate fragments. > I didn't find the corresponding implementation in hafnium code for this step. > And I want to know how to implement the associate action here. > > After that, optee lacks the implementation of FFA_MEM_FRAG_RX and FFA_MEM_FRAG_TX ABI in CFG_CORE_SEL2_SPMC enable case. > Is there any support plan for the implementation of fragmented memory retrieve in the optee community? > Does the hafnium community have a plan to implement it cooperatively? If I've understood this correctly we have two different cases of eventual fragmentation of descriptors. The first is the descriptor passed with FFA_MEM_RETRIEVE_REQ_32, this one is not likely to need fragmentation support soon. The other is the descriptor received with FFA_MEM_RETRIEVE_RESP, I believe this is where you've run into trouble. From OP-TEE point of view, it would make sense if you took lead on implementing this. I can help with review etc. Thanks, Jens > > Thanks a lot for your support. > > Regards, > Yuye. > > > > > > ------------------------------------------------------------------ > 发件人：Olivier Deprez <Olivier.Deprez(a)arm.com> > 发送时间：2023年4月13日(星期四) 15:52 > 收件人：梅建强(禹夜) <meijianqiang.mjq(a)alibaba-inc.com> > 抄送：hafnium <hafnium(a)lists.trustedfirmware.org>; Jens Wiklander <jens.wiklander(a)linaro.org> > 主题：Re: fragment transmission while retrieving memory > > Hi Yuye, Jens, > > For the record, and If I understand properly the last comment in the github issue: > OP-TEE is missing the implementation for receipt of a fragmented retrieve response > There is no further fix to be done in Hafnium for this specific issue at this moment, please let me know otherwise. > > Thanks, Olivier. > > > ________________________________ > From: 梅建强(禹夜) <meijianqiang.mjq(a)alibaba-inc.com> > Sent: 12 April 2023 09:27 > To: Olivier Deprez <Olivier.Deprez(a)arm.com> > Cc: hafnium <hafnium(a)lists.trustedfirmware.org>; Jens Wiklander <jens.wiklander(a)linaro.org> > Subject: Re: fragment transmission while retrieving memory > > > > > Hi, Olivier, > > In our setup, > Hafnium commit: 997476a74571aec4f1a23590d45edf516f3934f4 > optee version: 3.20.0 > Thanks. > > Regards, > Yuye. > > ------------------------------------------------------------------ > 发件人：Olivier Deprez <Olivier.Deprez(a)arm.com> > 发送时间：2023年4月12日(星期三) 15:22 > 收件人：梅建强(禹夜) <meijianqiang.mjq(a)alibaba-inc.com> > 抄送：hafnium <hafnium(a)lists.trustedfirmware.org>; Jens Wiklander <jens.wiklander(a)linaro.org> > 主题：Re: fragment transmission while retrieving memory > > Hi Yuye, > > AFAIK concerning Hafnium, fragmented mem sharing is supported for FFA_MEM_SHARE/LEND/DONATE and FFA_MEM_RETRIEVE_RESP. > (For the sake of clarity, this isn't supported for FFA_MEM_RETRIEVE_REQ but this shouldn't be a concern as this limitation only exists in the case of mem sharing to multiple borrowers. In your case of a single borrower the mem retrieve req. shouldn't have to be fragmented). > > Can you tell which hafnium commit hash is used in your setup? > > At the moment, I cannot tell if the issue described concern a miss in Hafnium or OP-TEE. > I need to dig a bit further into both implementations and I'll let you know. > > Regards, > Olivier. > > > ________________________________ > From: 梅建强(禹夜) <meijianqiang.mjq(a)alibaba-inc.com> > Sent: 12 April 2023 08:21 > To: Olivier Deprez <Olivier.Deprez(a)arm.com> > Cc: hafnium <hafnium(a)lists.trustedfirmware.org>; Jens Wiklander <jens.wiklander(a)linaro.org> > Subject: fragment transmission while retrieving memory > > > > > Hi, Olivier, > > Recently, I've been working on this issue. > https://github.com/OP-TEE/optee_os/issues/5943 <https://github.com/OP-TEE/optee_os/issues/5943 > > Do you know any differences between hafnium's current implementation of fragment transmission while retrieving memory and the example process described in FF-A 1.1 Figure 18.4? > > Regards, > Yuye. > >

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