From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D102C07CB1 for ; Mon, 27 Nov 2023 14:19:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233450AbjK0OTD (ORCPT ); Mon, 27 Nov 2023 09:19:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59120 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233541AbjK0OSo (ORCPT ); Mon, 27 Nov 2023 09:18:44 -0500 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C79543AA0 for ; Mon, 27 Nov 2023 06:16:11 -0800 (PST) Received: by mail-wm1-x335.google.com with SMTP id 5b1f17b1804b1-40859dee28cso34863775e9.0 for ; Mon, 27 Nov 2023 06:16:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1701094570; x=1701699370; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=6p7Yk0pPh+5XOIFlXKbXoyDeljmm58+0nwJPnMfZeAs=; b=CL8f33vzDfInh8DW9OeVyj7o/Me0n3OXqUPjMexwnhcJA9cpCLL+jlHglkqAyQ2RQE 2ajYM98zQbGfQ5AVXGcIkigh6ayM5DGkBUc7dcKzcZ2/U6Lrj29i1bz7wJkVPozNTlGf Lk5k3+Bwg4SJ/a70Te9y5pEpgkgKAdoXbnhTVcFBArPju2RAGMi/jUwaDJmoTqOTTu1w 5rvamGporhW1VT/vC8soJvLshja9Uejwk+FIHN7nyZNdykIG+WypDgxvl4Yc9PergTBN I36eaJOTglNcLtgXARRmC3Bw00I7SiIpyrtzqu3oSadPQX+SxLIYlXv8pNcCJQd/TVEz ZWcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701094570; x=1701699370; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=6p7Yk0pPh+5XOIFlXKbXoyDeljmm58+0nwJPnMfZeAs=; b=eaShsKJiqXPNVDTtULqFlW4HOuFdfzUrCb+tKlRX+Q0FWrPkNQbWJulvpO2qDwqmVW 3wiMWdeWoc6pjmCE9PEKUY21KkUNqHYaKsWB8u6W/qqikj2tDyKFew1kpdpD1vweQ7X2 gumeViTwizXZPW4LcDif3Sl786dJVKod9Kxw+jYNEQxsFX+7s4jTQvwD1f5CH/oPXcBc pi+52LLp85oO2GwUT9v3R9Ymlyw1ISDq7hYAeOhLqvNaK+Cs9aXbTp/gongZKVNDCWWP qnhnNk98QkBdpWdvvBL1vlvelCuRIYT00mNgaUf8iOmA2uLmodWgGxumaCtrHuXQyzwA b3mw== X-Gm-Message-State: AOJu0YzZpmDm+CwT4SqRRaE8dQ1+pUh4C/gWKfpWEuBekHfoSq5cYnFo P2DWC58ojKjXZVE10Dk8Dp9uvg== X-Google-Smtp-Source: AGHT+IGdj2lm+H87M+BbCZltT0WCKLIysUDz4kXF1jFX0sJyav3qV/p+Wda+ZHxLQ7t6J9lKOHi9pQ== X-Received: by 2002:a05:600c:684:b0:408:56ea:f061 with SMTP id a4-20020a05600c068400b0040856eaf061mr9276619wmn.24.1701094570027; Mon, 27 Nov 2023 06:16:10 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:09 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski , kernel test robot , Dan Carpenter Subject: [PATCH v6 01/13] firmware: qcom: qseecom: fix memory leaks in error paths Date: Mon, 27 Nov 2023 15:15:48 +0100 Message-Id: <20231127141600.20929-2-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Fix instances of returning error codes directly instead of jumping to the relevant labels where memory allocated for the SCM calls would be freed. Fixes: 759e7a2b62eb ("firmware: Add support for Qualcomm UEFI Secure Applic= ation") Reported-by: kernel test robot Reported-by: Dan Carpenter Closes: https://lore.kernel.org/r/202311270828.k4HGcjiL-lkp@intel.com/ Signed-off-by: Bartosz Golaszewski Reviewed-by: Elliot Berman Reviewed-by: Maximilian Luz Tested-by: Deepti Jaggi #sa8775p-ride --- .../firmware/qcom/qcom_qseecom_uefisecapp.c | 20 ++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c b/drivers/firm= ware/qcom/qcom_qseecom_uefisecapp.c index a33acdaf7b78..32188f098ef3 100644 --- a/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c +++ b/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c @@ -325,8 +325,10 @@ static efi_status_t qsee_uefi_get_variable(struct qcue= fi_client *qcuefi, const e req_data->length =3D req_size; =20 status =3D ucs2_strscpy(((void *)req_data) + req_data->name_offset, name,= name_length); - if (status < 0) - return EFI_INVALID_PARAMETER; + if (status < 0) { + efi_status =3D EFI_INVALID_PARAMETER; + goto out_free; + } =20 memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_s= ize); =20 @@ -471,8 +473,10 @@ static efi_status_t qsee_uefi_set_variable(struct qcue= fi_client *qcuefi, const e req_data->length =3D req_size; =20 status =3D ucs2_strscpy(((void *)req_data) + req_data->name_offset, name,= name_length); - if (status < 0) - return EFI_INVALID_PARAMETER; + if (status < 0) { + efi_status =3D EFI_INVALID_PARAMETER; + goto out_free; + } =20 memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_s= ize); =20 @@ -563,8 +567,10 @@ static efi_status_t qsee_uefi_get_next_variable(struct= qcuefi_client *qcuefi, memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_s= ize); status =3D ucs2_strscpy(((void *)req_data) + req_data->name_offset, name, *name_size / sizeof(*name)); - if (status < 0) - return EFI_INVALID_PARAMETER; + if (status < 0) { + efi_status =3D EFI_INVALID_PARAMETER; + goto out_free; + } =20 status =3D qcom_qseecom_app_send(qcuefi->client, req_data, req_size, rsp_= data, rsp_size); if (status) { @@ -635,7 +641,7 @@ static efi_status_t qsee_uefi_get_next_variable(struct = qcuefi_client *qcuefi, * have already been validated above, causing this function to * bail with EFI_BUFFER_TOO_SMALL. */ - return EFI_DEVICE_ERROR; + efi_status =3D EFI_DEVICE_ERROR; } =20 out_free: --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 934E9C4167B for ; Mon, 27 Nov 2023 14:19:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233695AbjK0OTI (ORCPT ); Mon, 27 Nov 2023 09:19:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233629AbjK0OSo (ORCPT ); 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Mon, 27 Nov 2023 06:16:10 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 02/13] firmware: qcom: add a dedicated TrustZone buffer allocator Date: Mon, 27 Nov 2023 15:15:49 +0100 Message-Id: <20231127141600.20929-3-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski We have several SCM calls that require passing buffers to the TrustZone on top of the SMC core which allocates memory for calls that require more than 4 arguments. Currently every user does their own thing which leads to code duplication. Many users call dma_alloc_coherent() for every call which is terribly unperformant (speed- and size-wise). Provide a set of library functions for creating and managing pool of memory which is suitable for sharing with the TrustZone, that is: page-aligned, contiguous and non-cachable as well as provides a way of mapping of kernel virtual addresses to physical space. Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/Kconfig | 19 ++ drivers/firmware/qcom/Makefile | 1 + drivers/firmware/qcom/qcom_tzmem.c | 302 +++++++++++++++++++++++ drivers/firmware/qcom/qcom_tzmem.h | 13 + include/linux/firmware/qcom/qcom_tzmem.h | 28 +++ 5 files changed, 363 insertions(+) create mode 100644 drivers/firmware/qcom/qcom_tzmem.c create mode 100644 drivers/firmware/qcom/qcom_tzmem.h create mode 100644 include/linux/firmware/qcom/qcom_tzmem.h diff --git a/drivers/firmware/qcom/Kconfig b/drivers/firmware/qcom/Kconfig index 3f05d9854ddf..b80269a28224 100644 --- a/drivers/firmware/qcom/Kconfig +++ b/drivers/firmware/qcom/Kconfig @@ -9,6 +9,25 @@ menu "Qualcomm firmware drivers" config QCOM_SCM tristate =20 +config QCOM_TZMEM + tristate + +choice + prompt "TrustZone interface memory allocator mode" + default QCOM_TZMEM_MODE_DEFAULT + help + Selects the mode of the memory allocator providing memory buffers of + suitable format for sharing with the TrustZone. If in doubt, select + 'Default'. + +config QCOM_TZMEM_MODE_DEFAULT + bool "Default" + help + Use the default allocator mode. The memory is page-aligned, non-cachable + and contiguous. + +endchoice + config QCOM_SCM_DOWNLOAD_MODE_DEFAULT bool "Qualcomm download mode enabled by default" depends on QCOM_SCM diff --git a/drivers/firmware/qcom/Makefile b/drivers/firmware/qcom/Makefile index c9f12ee8224a..0be40a1abc13 100644 --- a/drivers/firmware/qcom/Makefile +++ b/drivers/firmware/qcom/Makefile @@ -5,5 +5,6 @@ =20 obj-$(CONFIG_QCOM_SCM) +=3D qcom-scm.o qcom-scm-objs +=3D qcom_scm.o qcom_scm-smc.o qcom_scm-legacy.o +obj-$(CONFIG_QCOM_TZMEM) +=3D qcom_tzmem.o obj-$(CONFIG_QCOM_QSEECOM) +=3D qcom_qseecom.o obj-$(CONFIG_QCOM_QSEECOM_UEFISECAPP) +=3D qcom_qseecom_uefisecapp.o diff --git a/drivers/firmware/qcom/qcom_tzmem.c b/drivers/firmware/qcom/qco= m_tzmem.c new file mode 100644 index 000000000000..44a062f2abd4 --- /dev/null +++ b/drivers/firmware/qcom/qcom_tzmem.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Memory allocator for buffers shared with the TrustZone. + * + * Copyright (C) 2023 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "qcom_tzmem.h" + +struct qcom_tzmem_pool { + void *vbase; + dma_addr_t pbase; + size_t size; + struct gen_pool *pool; + void *priv; +}; + +struct qcom_tzmem_chunk { + phys_addr_t paddr; + size_t size; + struct qcom_tzmem_pool *owner; +}; + +static struct device *qcom_tzmem_dev; +static RADIX_TREE(qcom_tzmem_chunks, GFP_ATOMIC); +static DEFINE_SPINLOCK(qcom_tzmem_chunks_lock); + +#if IS_ENABLED(CONFIG_QCOM_TZMEM_MODE_DEFAULT) + +static int qcom_tzmem_init(void) +{ + return 0; +} + +static int qcom_tzmem_init_pool(struct qcom_tzmem_pool *pool) +{ + return 0; +} + +static void qcom_tzmem_cleanup_pool(struct qcom_tzmem_pool *pool) +{ + +} + +#endif /* CONFIG_QCOM_TZMEM_MODE_DEFAULT */ + +/** + * qcom_tzmem_pool_new() - Create a new TZ memory pool. + * @size: Size of the new pool in bytes. + * + * Create a new pool of memory suitable for sharing with the TrustZone. + * + * Must not be used in atomic context. + * + * Returns: + * New memory pool address or ERR_PTR() on error. + */ +struct qcom_tzmem_pool *qcom_tzmem_pool_new(size_t size) +{ + struct qcom_tzmem_pool *pool; + int ret =3D -ENOMEM; + + if (!size) + return ERR_PTR(-EINVAL); + + size =3D PAGE_ALIGN(size); + + pool =3D kzalloc(sizeof(*pool), GFP_KERNEL); + if (!pool) + return ERR_PTR(-ENOMEM); + + pool->size =3D size; + + pool->vbase =3D dma_alloc_coherent(qcom_tzmem_dev, size, &pool->pbase, + GFP_KERNEL); + if (!pool->vbase) + goto err_kfree_pool; + + pool->pool =3D gen_pool_create(PAGE_SHIFT, -1); + if (!pool) + goto err_dma_free; + + gen_pool_set_algo(pool->pool, gen_pool_best_fit, NULL); + + ret =3D gen_pool_add_virt(pool->pool, (unsigned long)pool->vbase, + (phys_addr_t)pool->pbase, size, -1); + if (ret) + goto err_destroy_genpool; + + ret =3D qcom_tzmem_init_pool(pool); + if (ret) + goto err_destroy_genpool; + + return pool; + +err_destroy_genpool: + gen_pool_destroy(pool->pool); +err_dma_free: + dma_free_coherent(qcom_tzmem_dev, size, pool->vbase, pool->pbase); +err_kfree_pool: + kfree(pool); + return ERR_PTR(ret); +} +EXPORT_SYMBOL_GPL(qcom_tzmem_pool_new); + +/** + * qcom_tzmem_pool_free() - Destroy a TZ memory pool and free all resource= s. + * @pool: Memory pool to free. + * + * Must not be called if any of the allocated chunks has not been freed. + * Must not be used in atomic context. + */ +void qcom_tzmem_pool_free(struct qcom_tzmem_pool *pool) +{ + struct qcom_tzmem_chunk *chunk; + struct radix_tree_iter iter; + bool non_empty =3D false; + void __rcu **slot; + + if (!pool) + return; + + qcom_tzmem_cleanup_pool(pool); + + scoped_guard(spinlock_irqsave, &qcom_tzmem_chunks_lock) { + radix_tree_for_each_slot(slot, &qcom_tzmem_chunks, &iter, 0) { + chunk =3D radix_tree_deref_slot_protected(slot, + &qcom_tzmem_chunks_lock); + + if (chunk->owner =3D=3D pool) + non_empty =3D true; + } + } + + WARN(non_empty, "Freeing TZ memory pool with memory still allocated"); + + gen_pool_destroy(pool->pool); + dma_free_coherent(qcom_tzmem_dev, pool->size, pool->vbase, pool->pbase); + kfree(pool); +} +EXPORT_SYMBOL_GPL(qcom_tzmem_pool_free); + +static void devm_qcom_tzmem_pool_free(void *data) +{ + struct qcom_tzmem_pool *pool =3D data; + + qcom_tzmem_pool_free(pool); +} + +/** + * devm_qcom_tzmem_pool_new() - Managed variant of qcom_tzmem_pool_new(). + * @dev: Device managing this resource. + * @size: Size of the pool in bytes. + * + * Must not be used in atomic context. + * + * Returns: + * Address of the managed pool or ERR_PTR() on failure. + */ +struct qcom_tzmem_pool * +devm_qcom_tzmem_pool_new(struct device *dev, size_t size) +{ + struct qcom_tzmem_pool *pool; + int ret; + + pool =3D qcom_tzmem_pool_new(size); + if (IS_ERR(pool)) + return pool; + + ret =3D devm_add_action_or_reset(dev, devm_qcom_tzmem_pool_free, pool); + if (ret) + return ERR_PTR(ret); + + return pool; +} + +/** + * qcom_tzmem_alloc() - Allocate a memory chunk suitable for sharing with = TZ. + * @pool: TZ memory pool from which to allocate memory. + * @size: Number of bytes to allocate. + * @gfp: GFP flags. + * + * Can be used in any context. + * + * Returns: + * Address of the allocated buffer or NULL if no more memory can be alloca= ted. + * The buffer must be released using qcom_tzmem_free(). + */ +void *qcom_tzmem_alloc(struct qcom_tzmem_pool *pool, size_t size, gfp_t gf= p) +{ + struct qcom_tzmem_chunk *chunk; + unsigned long vaddr; + int ret; + + if (!size) + return NULL; + + size =3D PAGE_ALIGN(size); + + chunk =3D kzalloc(sizeof(*chunk), gfp); + if (!chunk) + return NULL; + + vaddr =3D gen_pool_alloc(pool->pool, size); + if (!vaddr) { + kfree(chunk); + return NULL; + } + + chunk->paddr =3D gen_pool_virt_to_phys(pool->pool, vaddr); + chunk->size =3D size; + chunk->owner =3D pool; + + scoped_guard(spinlock_irqsave, &qcom_tzmem_chunks_lock) { + ret =3D radix_tree_insert(&qcom_tzmem_chunks, vaddr, chunk); + if (ret) { + gen_pool_free(pool->pool, vaddr, size); + kfree(chunk); + return NULL; + } + } + + return (void *)vaddr; +} +EXPORT_SYMBOL_GPL(qcom_tzmem_alloc); + +/** + * qcom_tzmem_free() - Release a buffer allocated from a TZ memory pool. + * @vaddr: Virtual address of the buffer. + * + * Can be used in any context. + */ +void qcom_tzmem_free(void *vaddr) +{ + struct qcom_tzmem_chunk *chunk; + + scoped_guard(spinlock_irqsave, &qcom_tzmem_chunks_lock) + chunk =3D radix_tree_delete_item(&qcom_tzmem_chunks, + (unsigned long)vaddr, NULL); + + if (!chunk) { + WARN(1, "Virtual address %p not owned by TZ memory allocator", + vaddr); + return; + } + + gen_pool_free(chunk->owner->pool, (unsigned long)vaddr, chunk->size); + kfree(chunk); +} +EXPORT_SYMBOL_GPL(qcom_tzmem_free); + +/** + * qcom_tzmem_to_phys() - Map the virtual address of a TZ buffer to physic= al. + * @vaddr: Virtual address of the buffer allocated from a TZ memory pool. + * + * Can be used in any context. The address must have been returned by a ca= ll + * to qcom_tzmem_alloc(). + * + * Returns: + * Physical address of the buffer. + */ +phys_addr_t qcom_tzmem_to_phys(void *vaddr) +{ + struct qcom_tzmem_chunk *chunk; + + guard(spinlock_irqsave)(&qcom_tzmem_chunks_lock); + + chunk =3D radix_tree_lookup(&qcom_tzmem_chunks, (unsigned long)vaddr); + if (!chunk) + return 0; + + return chunk->paddr; +} +EXPORT_SYMBOL_GPL(qcom_tzmem_to_phys); + +int qcom_tzmem_enable(struct device *dev) +{ + if (qcom_tzmem_dev) + return -EBUSY; + + qcom_tzmem_dev =3D dev; + + return qcom_tzmem_init(); +} +EXPORT_SYMBOL_GPL(qcom_tzmem_enable); + +MODULE_DESCRIPTION("TrustZone memory allocator for Qualcomm firmware drive= rs"); +MODULE_AUTHOR("Bartosz Golaszewski "); +MODULE_LICENSE("GPL"); diff --git a/drivers/firmware/qcom/qcom_tzmem.h b/drivers/firmware/qcom/qco= m_tzmem.h new file mode 100644 index 000000000000..f82f5dc5b7b1 --- /dev/null +++ b/drivers/firmware/qcom/qcom_tzmem.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2023 Linaro Ltd. + */ + +#ifndef __QCOM_TZMEM_PRIV_H +#define __QCOM_TZMEM_PRIV_H + +struct device; + +int qcom_tzmem_enable(struct device *dev); + +#endif /* __QCOM_TZMEM_PRIV_H */ diff --git a/include/linux/firmware/qcom/qcom_tzmem.h b/include/linux/firmw= are/qcom/qcom_tzmem.h new file mode 100644 index 000000000000..8e7fddab8cb4 --- /dev/null +++ b/include/linux/firmware/qcom/qcom_tzmem.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2023 Linaro Ltd. + */ + +#ifndef __QCOM_TZMEM_H +#define __QCOM_TZMEM_H + +#include +#include +#include + +struct device; +struct qcom_tzmem_pool; + +struct qcom_tzmem_pool *qcom_tzmem_pool_new(size_t size); +void qcom_tzmem_pool_free(struct qcom_tzmem_pool *pool); +struct qcom_tzmem_pool * +devm_qcom_tzmem_pool_new(struct device *dev, size_t size); + +void *qcom_tzmem_alloc(struct qcom_tzmem_pool *pool, size_t size, gfp_t gf= p); +void qcom_tzmem_free(void *ptr); + +DEFINE_FREE(qcom_tzmem, void *, if (_T) qcom_tzmem_free(_T)); + +phys_addr_t qcom_tzmem_to_phys(void *ptr); + +#endif /* __QCOM_TZMEM */ --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 575ECC4167B for ; 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charset="utf-8" From: Bartosz Golaszewski Select the TrustZone memory allocator in Kconfig and create a pool of memory shareable with the TrustZone when probing the SCM driver. This will allow a gradual conversion of all relevant SCM calls to using the dedicated allocator. Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/Kconfig | 1 + drivers/firmware/qcom/qcom_scm.c | 16 ++++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/drivers/firmware/qcom/Kconfig b/drivers/firmware/qcom/Kconfig index b80269a28224..237da40de832 100644 --- a/drivers/firmware/qcom/Kconfig +++ b/drivers/firmware/qcom/Kconfig @@ -7,6 +7,7 @@ menu "Qualcomm firmware drivers" =20 config QCOM_SCM + select QCOM_TZMEM tristate =20 config QCOM_TZMEM diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 520de9b5633a..0d4c028be0c1 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -8,8 +8,10 @@ #include #include #include +#include #include #include +#include #include #include #include @@ -20,9 +22,11 @@ #include #include #include +#include #include =20 #include "qcom_scm.h" +#include "qcom_tzmem.h" =20 static bool download_mode =3D IS_ENABLED(CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEF= AULT); module_param(download_mode, bool, 0); @@ -41,6 +45,8 @@ struct qcom_scm { int scm_vote_count; =20 u64 dload_mode_addr; + + struct qcom_tzmem_pool *mempool; }; =20 struct qcom_scm_current_perm_info { @@ -1887,6 +1893,16 @@ static int qcom_scm_probe(struct platform_device *pd= ev) if (of_property_read_bool(pdev->dev.of_node, "qcom,sdi-enabled")) qcom_scm_disable_sdi(); =20 + ret =3D qcom_tzmem_enable(__scm->dev); + if (ret) + return dev_err_probe(__scm->dev, ret, + "Failed to enable the TrustZone memory allocator\n"); + + __scm->mempool =3D devm_qcom_tzmem_pool_new(__scm->dev, SZ_256K); + if (IS_ERR(__scm->mempool)) + return dev_err_probe(__scm->dev, PTR_ERR(__scm->mempool), + "Failed to create the SCM memory pool\n"); + /* * Initialize the QSEECOM interface. * --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31B7BC4167B for ; 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Mon, 27 Nov 2023 06:16:14 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:13 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 04/13] firmware: qcom: scm: smc: switch to using the SCM allocator Date: Mon, 27 Nov 2023 15:15:51 +0100 Message-Id: <20231127141600.20929-5-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski We need to allocate, map and pass a buffer to the trustzone if we have more than 4 arguments for a given SCM calls. Let's use the new TrustZone allocator for that memory and shrink the code in process. As this code lives in a different compilation unit than the rest of the SCM code, we need to provide a helper in the form of qcom_scm_get_tzmem_pool() that allows the SMC low-level routines to access the SCM memory pool. Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/qcom_scm-smc.c | 30 ++++++++-------------------- drivers/firmware/qcom/qcom_scm.c | 5 +++++ drivers/firmware/qcom/qcom_scm.h | 3 +++ 3 files changed, 16 insertions(+), 22 deletions(-) diff --git a/drivers/firmware/qcom/qcom_scm-smc.c b/drivers/firmware/qcom/q= com_scm-smc.c index 16cf88acfa8e..dca5f3f1883b 100644 --- a/drivers/firmware/qcom/qcom_scm-smc.c +++ b/drivers/firmware/qcom/qcom_scm-smc.c @@ -2,6 +2,7 @@ /* Copyright (c) 2015,2019 The Linux Foundation. All rights reserved. */ =20 +#include #include #include #include @@ -9,6 +10,7 @@ #include #include #include +#include #include #include =20 @@ -150,11 +152,10 @@ int __scm_smc_call(struct device *dev, const struct q= com_scm_desc *desc, enum qcom_scm_convention qcom_convention, struct qcom_scm_res *res, bool atomic) { + struct qcom_tzmem_pool *mempool =3D qcom_scm_get_tzmem_pool(); int arglen =3D desc->arginfo & 0xf; int i, ret; - dma_addr_t args_phys =3D 0; - void *args_virt =3D NULL; - size_t alloc_len; + void *args_virt __free(qcom_tzmem) =3D NULL; gfp_t flag =3D atomic ? GFP_ATOMIC : GFP_KERNEL; u32 smccc_call_type =3D atomic ? ARM_SMCCC_FAST_CALL : ARM_SMCCC_STD_CALL; u32 qcom_smccc_convention =3D (qcom_convention =3D=3D SMC_CONVENTION_ARM_= 32) ? @@ -172,9 +173,9 @@ int __scm_smc_call(struct device *dev, const struct qco= m_scm_desc *desc, smc.args[i + SCM_SMC_FIRST_REG_IDX] =3D desc->args[i]; =20 if (unlikely(arglen > SCM_SMC_N_REG_ARGS)) { - alloc_len =3D SCM_SMC_N_EXT_ARGS * sizeof(u64); - args_virt =3D kzalloc(PAGE_ALIGN(alloc_len), flag); - + args_virt =3D qcom_tzmem_alloc(mempool, + SCM_SMC_N_EXT_ARGS * sizeof(u64), + flag); if (!args_virt) return -ENOMEM; =20 @@ -192,25 +193,10 @@ int __scm_smc_call(struct device *dev, const struct q= com_scm_desc *desc, SCM_SMC_FIRST_EXT_IDX]); } =20 - args_phys =3D dma_map_single(dev, args_virt, alloc_len, - DMA_TO_DEVICE); - - if (dma_mapping_error(dev, args_phys)) { - kfree(args_virt); - return -ENOMEM; - } - - smc.args[SCM_SMC_LAST_REG_IDX] =3D args_phys; + smc.args[SCM_SMC_LAST_REG_IDX] =3D qcom_tzmem_to_phys(args_virt); } =20 - /* ret error check follows after args_virt cleanup*/ ret =3D __scm_smc_do(dev, &smc, &smc_res, atomic); - - if (args_virt) { - dma_unmap_single(dev, args_phys, alloc_len, DMA_TO_DEVICE); - kfree(args_virt); - } - if (ret) return ret; =20 diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 0d4c028be0c1..71e98b666391 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -201,6 +201,11 @@ static void qcom_scm_bw_disable(void) enum qcom_scm_convention qcom_scm_convention =3D SMC_CONVENTION_UNKNOWN; static DEFINE_SPINLOCK(scm_query_lock); =20 +struct qcom_tzmem_pool *qcom_scm_get_tzmem_pool(void) +{ + return __scm->mempool; +} + static enum qcom_scm_convention __get_convention(void) { unsigned long flags; diff --git a/drivers/firmware/qcom/qcom_scm.h b/drivers/firmware/qcom/qcom_= scm.h index 4532907e8489..aa7d06939f8e 100644 --- a/drivers/firmware/qcom/qcom_scm.h +++ b/drivers/firmware/qcom/qcom_scm.h @@ -5,6 +5,7 @@ #define __QCOM_SCM_INT_H =20 struct device; +struct qcom_tzmem_pool; =20 enum qcom_scm_convention { SMC_CONVENTION_UNKNOWN, @@ -78,6 +79,8 @@ int scm_legacy_call_atomic(struct device *dev, const stru= ct qcom_scm_desc *desc, int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc, struct qcom_scm_res *res); =20 +struct qcom_tzmem_pool *qcom_scm_get_tzmem_pool(void); + #define QCOM_SCM_SVC_BOOT 0x01 #define QCOM_SCM_BOOT_SET_ADDR 0x01 #define QCOM_SCM_BOOT_TERMINATE_PC 0x02 --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13096C46CA3 for ; Mon, 27 Nov 2023 14:19:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233722AbjK0OTX (ORCPT ); Mon, 27 Nov 2023 09:19:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233674AbjK0OSp (ORCPT ); Mon, 27 Nov 2023 09:18:45 -0500 Received: from mail-wm1-x32c.google.com (mail-wm1-x32c.google.com [IPv6:2a00:1450:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF3A53AAC for ; 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Mon, 27 Nov 2023 06:16:14 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 05/13] firmware: qcom: scm: make qcom_scm_assign_mem() use the TZ allocator Date: Mon, 27 Nov 2023 15:15:52 +0100 Message-Id: <20231127141600.20929-6-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Let's use the new TZ memory allocator to obtain a buffer for this call instead of using dma_alloc_coherent(). Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/qcom_scm.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 71e98b666391..754f6056b99f 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -4,6 +4,7 @@ */ =20 #include +#include #include #include #include @@ -998,14 +999,13 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t = mem_sz, struct qcom_scm_mem_map_info *mem_to_map; phys_addr_t mem_to_map_phys; phys_addr_t dest_phys; - dma_addr_t ptr_phys; + phys_addr_t ptr_phys; size_t mem_to_map_sz; size_t dest_sz; size_t src_sz; size_t ptr_sz; int next_vm; __le32 *src; - void *ptr; int ret, i, b; u64 srcvm_bits =3D *srcvm; =20 @@ -1015,10 +1015,13 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_= t mem_sz, ptr_sz =3D ALIGN(src_sz, SZ_64) + ALIGN(mem_to_map_sz, SZ_64) + ALIGN(dest_sz, SZ_64); =20 - ptr =3D dma_alloc_coherent(__scm->dev, ptr_sz, &ptr_phys, GFP_KERNEL); + void *ptr __free(qcom_tzmem) =3D qcom_tzmem_alloc(__scm->mempool, + ptr_sz, GFP_KERNEL); if (!ptr) return -ENOMEM; =20 + ptr_phys =3D qcom_tzmem_to_phys(ptr); + /* Fill source vmid detail */ src =3D ptr; i =3D 0; @@ -1047,7 +1050,6 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t = mem_sz, =20 ret =3D __qcom_scm_assign_mem(__scm->dev, mem_to_map_phys, mem_to_map_sz, ptr_phys, src_sz, dest_phys, dest_sz); - dma_free_coherent(__scm->dev, ptr_sz, ptr, ptr_phys); if (ret) { dev_err(__scm->dev, "Assign memory protection call failed %d\n", ret); --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 276DBC4167B for ; Mon, 27 Nov 2023 14:19:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233812AbjK0OT2 (ORCPT ); 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Mon, 27 Nov 2023 06:16:15 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 06/13] firmware: qcom: scm: make qcom_scm_ice_set_key() use the TZ allocator Date: Mon, 27 Nov 2023 15:15:53 +0100 Message-Id: <20231127141600.20929-7-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Let's use the new TZ memory allocator to obtain a buffer for this call instead of using dma_alloc_coherent(). Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/qcom_scm.c | 21 +++++---------------- 1 file changed, 5 insertions(+), 16 deletions(-) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 754f6056b99f..31071a714cf1 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1197,32 +1197,21 @@ int qcom_scm_ice_set_key(u32 index, const u8 *key, = u32 key_size, .args[4] =3D data_unit_size, .owner =3D ARM_SMCCC_OWNER_SIP, }; - void *keybuf; - dma_addr_t key_phys; + int ret; =20 - /* - * 'key' may point to vmalloc()'ed memory, but we need to pass a - * physical address that's been properly flushed. The sanctioned way to - * do this is by using the DMA API. But as is best practice for crypto - * keys, we also must wipe the key after use. This makes kmemdup() + - * dma_map_single() not clearly correct, since the DMA API can use - * bounce buffers. Instead, just use dma_alloc_coherent(). Programming - * keys is normally rare and thus not performance-critical. - */ - - keybuf =3D dma_alloc_coherent(__scm->dev, key_size, &key_phys, - GFP_KERNEL); + void *keybuf __free(qcom_tzmem) =3D qcom_tzmem_alloc(__scm->mempool, + key_size, + GFP_KERNEL); if (!keybuf) return -ENOMEM; memcpy(keybuf, key, key_size); - desc.args[1] =3D key_phys; + desc.args[1] =3D qcom_tzmem_to_phys(keybuf); =20 ret =3D qcom_scm_call(__scm->dev, &desc, NULL); =20 memzero_explicit(keybuf, key_size); =20 - dma_free_coherent(__scm->dev, key_size, keybuf, key_phys); return ret; } EXPORT_SYMBOL_GPL(qcom_scm_ice_set_key); --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 451A5C4167B for ; Mon, 27 Nov 2023 14:19:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233732AbjK0OTa (ORCPT ); Mon, 27 Nov 2023 09:19:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233672AbjK0OSr (ORCPT ); Mon, 27 Nov 2023 09:18:47 -0500 Received: from mail-lj1-x234.google.com (mail-lj1-x234.google.com [IPv6:2a00:1450:4864:20::234]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CBC1F3ABD for ; Mon, 27 Nov 2023 06:16:19 -0800 (PST) Received: by mail-lj1-x234.google.com with SMTP id 38308e7fff4ca-2c501bd6ff1so56505681fa.3 for ; Mon, 27 Nov 2023 06:16:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1701094578; x=1701699378; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=eVNRTBYkQ35refPua6fnWM3rCBTplvWDVxVAY6Q7+Wo=; b=ZxAcd3fAtdQJ3ooQw2VB96QiEzOjjCVR2TBtb6hPAjOzKjwcUNkKOdajs3M1rViqNQ Agraw2xK4ZsA4uDKhFqoUQY8o3fNgySf1UnMuqPkikrtFcDeYuKSf6YzN8BHSKIjMQ+8 2LE2LI7FzBnadeVUL1BWtFSZ4S+rBv0+4X8iDDYm9FiV3vuRUeRuwkQkRokHPeEhT/+8 JPdwcFznU8n4aJ3GguAIj7cjonnmAgy7EfX22gqxdgHsCJNwz0VTOZI+kmfen900bTrA sEKDRKTn9TjzJhuIw0uf2XEF/bJDVSjrm4ShO7axi3kxhs8uDsulnupO/Bcz1fN2k9Wr DwrA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701094578; x=1701699378; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=eVNRTBYkQ35refPua6fnWM3rCBTplvWDVxVAY6Q7+Wo=; b=bHXQ1y0/46uub6MoWPE8X/R3FY4BdnGre5KitjI2ZPkp5TkCSdlAaH1Q4myfYL3pP2 iDTSka5SRkQcxju/DinShT/ZHDZiz0EOZDDcisMcwiOOp/gl5x40S4uv2ZYTjbziVaZy oOi+HPv9heA9vi77kz4GCMjJ1ZMYCKs/M2xQFPsjKsol9tILQQw4ahO9olxWHuGvGxoa aLyiQFzdf5OHW4zPL5XA0HNEUndtbWO9MHA3EPlDIqedVVLJLTlQxYZrOpoCN51LkpYh Wyt+zbYHGkhk6eFBiUuRNmbXX6gKUjDprGlyCskCjH+yV1inovlG+UraxdyqanBrMcQU uCZg== X-Gm-Message-State: AOJu0YxSXhdfdqx2o/kCWWkygjoObPy4kCugKkQAlcxSiZ/SCeuwrXgS iRFAyJkHvY9eU9Bc9Cvdqn5bGw== X-Google-Smtp-Source: AGHT+IEZUxmSOKvYVwtL0F7BrhlYoGaqOU8AJQaYo2RkaaxHLkEg9bcAwxd0mdj4l3PkFiSHNjGBmg== X-Received: by 2002:a2e:b5b6:0:b0:2c9:9a20:f496 with SMTP id f22-20020a2eb5b6000000b002c99a20f496mr3657189ljn.29.1701094577880; Mon, 27 Nov 2023 06:16:17 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:17 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 07/13] firmware: qcom: scm: make qcom_scm_lmh_dcvsh() use the TZ allocator Date: Mon, 27 Nov 2023 15:15:54 +0100 Message-Id: <20231127141600.20929-8-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Let's use the new TZ memory allocator to obtain a buffer for this call instead of using dma_alloc_coherent(). Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/qcom_scm.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 31071a714cf1..11638daa2fe5 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1340,8 +1340,6 @@ EXPORT_SYMBOL_GPL(qcom_scm_lmh_profile_change); int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg, u32 payload_val, u64 limit_node, u32 node_id, u64 version) { - dma_addr_t payload_phys; - u32 *payload_buf; int ret, payload_size =3D 5 * sizeof(u32); =20 struct qcom_scm_desc desc =3D { @@ -1356,7 +1354,9 @@ int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_re= g, u32 payload_val, .owner =3D ARM_SMCCC_OWNER_SIP, }; =20 - payload_buf =3D dma_alloc_coherent(__scm->dev, payload_size, &payload_phy= s, GFP_KERNEL); + u32 *payload_buf __free(qcom_tzmem) =3D qcom_tzmem_alloc(__scm->mempool, + payload_size, + GFP_KERNEL); if (!payload_buf) return -ENOMEM; =20 @@ -1366,11 +1366,10 @@ int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_= reg, u32 payload_val, payload_buf[3] =3D 1; payload_buf[4] =3D payload_val; =20 - desc.args[0] =3D payload_phys; + desc.args[0] =3D qcom_tzmem_to_phys(payload_buf); =20 ret =3D qcom_scm_call(__scm->dev, &desc, NULL); =20 - dma_free_coherent(__scm->dev, payload_size, payload_buf, payload_phys); return ret; } EXPORT_SYMBOL_GPL(qcom_scm_lmh_dcvsh); --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5E9FC4167B for ; Mon, 27 Nov 2023 14:19:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233822AbjK0OTe (ORCPT ); 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Mon, 27 Nov 2023 06:16:18 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 08/13] firmware: qcom: scm: make qcom_scm_qseecom_app_get_id() use the TZ allocator Date: Mon, 27 Nov 2023 15:15:55 +0100 Message-Id: <20231127141600.20929-9-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Let's use the new TZ memory allocator to obtain a buffer for this call instead of manually kmalloc()ing it and then mapping to physical space. Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Maximilian Luz Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/qcom_scm.c | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 11638daa2fe5..3a6cefb4eb2e 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1525,37 +1525,27 @@ int qcom_scm_qseecom_app_get_id(const char *app_nam= e, u32 *app_id) unsigned long app_name_len =3D strlen(app_name); struct qcom_scm_desc desc =3D {}; struct qcom_scm_qseecom_resp res =3D {}; - dma_addr_t name_buf_phys; - char *name_buf; int status; =20 if (app_name_len >=3D name_buf_size) return -EINVAL; =20 - name_buf =3D kzalloc(name_buf_size, GFP_KERNEL); + char *name_buf __free(qcom_tzmem) =3D qcom_tzmem_alloc(__scm->mempool, + name_buf_size, + GFP_KERNEL); if (!name_buf) return -ENOMEM; =20 memcpy(name_buf, app_name, app_name_len); =20 - name_buf_phys =3D dma_map_single(__scm->dev, name_buf, name_buf_size, DMA= _TO_DEVICE); - status =3D dma_mapping_error(__scm->dev, name_buf_phys); - if (status) { - kfree(name_buf); - dev_err(__scm->dev, "qseecom: failed to map dma address\n"); - return status; - } - desc.owner =3D QSEECOM_TZ_OWNER_QSEE_OS; desc.svc =3D QSEECOM_TZ_SVC_APP_MGR; desc.cmd =3D QSEECOM_TZ_CMD_APP_LOOKUP; desc.arginfo =3D QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL); - desc.args[0] =3D name_buf_phys; + desc.args[0] =3D qcom_tzmem_to_phys(name_buf); desc.args[1] =3D app_name_len; =20 status =3D qcom_scm_qseecom_call(&desc, &res); - dma_unmap_single(__scm->dev, name_buf_phys, name_buf_size, DMA_TO_DEVICE); - kfree(name_buf); =20 if (status) return status; --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE820C4167B for ; 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Mon, 27 Nov 2023 06:16:20 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:20 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 09/13] firmware: qcom: qseecom: convert to using the TZ allocator Date: Mon, 27 Nov 2023 15:15:56 +0100 Message-Id: <20231127141600.20929-10-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Drop the DMA mapping operations from qcom_scm_qseecom_app_send() and convert all users of it in the qseecom module to using the TZ allocator for creating SCM call buffers. Together with using the cleanup macros, it has the added benefit of a significant code shrink. As this is largely a module separate from the SCM driver, let's use a separate memory pool. Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Maximilian Luz Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- .../firmware/qcom/qcom_qseecom_uefisecapp.c | 281 +++++++----------- drivers/firmware/qcom/qcom_scm.c | 30 +- include/linux/firmware/qcom/qcom_qseecom.h | 4 +- 3 files changed, 111 insertions(+), 204 deletions(-) diff --git a/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c b/drivers/firm= ware/qcom/qcom_qseecom_uefisecapp.c index 32188f098ef3..3a068f8b6990 100644 --- a/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c +++ b/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c @@ -7,17 +7,21 @@ * Copyright (C) 2023 Maximilian Luz */ =20 +#include #include #include #include #include #include #include +#include #include #include #include =20 #include +#include +#include =20 /* -- Qualcomm "uefisecapp" interface definitions. -----------------------= --- */ =20 @@ -253,6 +257,7 @@ struct qsee_rsp_uefi_query_variable_info { struct qcuefi_client { struct qseecom_client *client; struct efivars efivars; + struct qcom_tzmem_pool *mempool; }; =20 static struct device *qcuefi_dev(struct qcuefi_client *qcuefi) @@ -272,11 +277,11 @@ static efi_status_t qsee_uefi_get_variable(struct qcu= efi_client *qcuefi, const e const efi_guid_t *guid, u32 *attributes, unsigned long *data_size, void *data) { - struct qsee_req_uefi_get_variable *req_data; - struct qsee_rsp_uefi_get_variable *rsp_data; + struct qsee_req_uefi_get_variable *req_data __free(qcom_tzmem) =3D NULL; + struct qsee_rsp_uefi_get_variable *rsp_data __free(qcom_tzmem) =3D NULL; unsigned long buffer_size =3D *data_size; - efi_status_t efi_status =3D EFI_SUCCESS; unsigned long name_length; + efi_status_t efi_status; size_t guid_offs; size_t name_offs; size_t req_size; @@ -304,17 +309,13 @@ static efi_status_t qsee_uefi_get_variable(struct qcu= efi_client *qcuefi, const e __array(u8, buffer_size) ); =20 - req_data =3D kzalloc(req_size, GFP_KERNEL); - if (!req_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out; - } + req_data =3D qcom_tzmem_alloc(qcuefi->mempool, req_size, GFP_KERNEL); + if (!req_data) + return EFI_OUT_OF_RESOURCES; =20 - rsp_data =3D kzalloc(rsp_size, GFP_KERNEL); - if (!rsp_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out_free_req; - } + rsp_data =3D qcom_tzmem_alloc(qcuefi->mempool, rsp_size, GFP_KERNEL); + if (!rsp_data) + return EFI_OUT_OF_RESOURCES; =20 req_data->command_id =3D QSEE_CMD_UEFI_GET_VARIABLE; req_data->data_size =3D buffer_size; @@ -325,28 +326,20 @@ static efi_status_t qsee_uefi_get_variable(struct qcu= efi_client *qcuefi, const e req_data->length =3D req_size; =20 status =3D ucs2_strscpy(((void *)req_data) + req_data->name_offset, name,= name_length); - if (status < 0) { - efi_status =3D EFI_INVALID_PARAMETER; - goto out_free; - } + if (status < 0) + return EFI_INVALID_PARAMETER; =20 memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_s= ize); =20 status =3D qcom_qseecom_app_send(qcuefi->client, req_data, req_size, rsp_= data, rsp_size); - if (status) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (status) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->command_id !=3D QSEE_CMD_UEFI_GET_VARIABLE) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->command_id !=3D QSEE_CMD_UEFI_GET_VARIABLE) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->length < sizeof(*rsp_data)) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->length < sizeof(*rsp_data)) + return EFI_DEVICE_ERROR; =20 if (rsp_data->status) { dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n", @@ -360,18 +353,14 @@ static efi_status_t qsee_uefi_get_variable(struct qcu= efi_client *qcuefi, const e *attributes =3D rsp_data->attributes; } =20 - goto out_free; + return efi_status; } =20 - if (rsp_data->length > rsp_size) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->length > rsp_size) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->data_offset + rsp_data->data_size > rsp_data->length) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->data_offset + rsp_data->data_size > rsp_data->length) + return EFI_DEVICE_ERROR; =20 /* * Note: We need to set attributes and data size even if the buffer is @@ -394,33 +383,23 @@ static efi_status_t qsee_uefi_get_variable(struct qcu= efi_client *qcuefi, const e if (attributes) *attributes =3D rsp_data->attributes; =20 - if (buffer_size =3D=3D 0 && !data) { - efi_status =3D EFI_SUCCESS; - goto out_free; - } + if (buffer_size =3D=3D 0 && !data) + return EFI_SUCCESS; =20 - if (buffer_size < rsp_data->data_size) { - efi_status =3D EFI_BUFFER_TOO_SMALL; - goto out_free; - } + if (buffer_size < rsp_data->data_size) + return EFI_BUFFER_TOO_SMALL; =20 memcpy(data, ((void *)rsp_data) + rsp_data->data_offset, rsp_data->data_s= ize); =20 -out_free: - kfree(rsp_data); -out_free_req: - kfree(req_data); -out: - return efi_status; + return EFI_SUCCESS; } =20 static efi_status_t qsee_uefi_set_variable(struct qcuefi_client *qcuefi, c= onst efi_char16_t *name, const efi_guid_t *guid, u32 attributes, unsigned long data_size, const void *data) { - struct qsee_req_uefi_set_variable *req_data; - struct qsee_rsp_uefi_set_variable *rsp_data; - efi_status_t efi_status =3D EFI_SUCCESS; + struct qsee_req_uefi_set_variable *req_data __free(qcom_tzmem) =3D NULL; + struct qsee_rsp_uefi_set_variable *rsp_data __free(qcom_tzmem) =3D NULL; unsigned long name_length; size_t name_offs; size_t guid_offs; @@ -450,17 +429,14 @@ static efi_status_t qsee_uefi_set_variable(struct qcu= efi_client *qcuefi, const e __array_offs(u8, data_size, &data_offs) ); =20 - req_data =3D kzalloc(req_size, GFP_KERNEL); - if (!req_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out; - } + req_data =3D qcom_tzmem_alloc(qcuefi->mempool, req_size, GFP_KERNEL); + if (!req_data) + return EFI_OUT_OF_RESOURCES; =20 - rsp_data =3D kzalloc(sizeof(*rsp_data), GFP_KERNEL); - if (!rsp_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out_free_req; - } + rsp_data =3D qcom_tzmem_alloc(qcuefi->mempool, sizeof(*rsp_data), + GFP_KERNEL); + if (!rsp_data) + return EFI_OUT_OF_RESOURCES; =20 req_data->command_id =3D QSEE_CMD_UEFI_SET_VARIABLE; req_data->attributes =3D attributes; @@ -473,10 +449,8 @@ static efi_status_t qsee_uefi_set_variable(struct qcue= fi_client *qcuefi, const e req_data->length =3D req_size; =20 status =3D ucs2_strscpy(((void *)req_data) + req_data->name_offset, name,= name_length); - if (status < 0) { - efi_status =3D EFI_INVALID_PARAMETER; - goto out_free; - } + if (status < 0) + return EFI_INVALID_PARAMETER; =20 memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_s= ize); =20 @@ -485,42 +459,31 @@ static efi_status_t qsee_uefi_set_variable(struct qcu= efi_client *qcuefi, const e =20 status =3D qcom_qseecom_app_send(qcuefi->client, req_data, req_size, rsp_= data, sizeof(*rsp_data)); - if (status) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (status) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->command_id !=3D QSEE_CMD_UEFI_SET_VARIABLE) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->command_id !=3D QSEE_CMD_UEFI_SET_VARIABLE) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->length !=3D sizeof(*rsp_data)) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->length !=3D sizeof(*rsp_data)) + return EFI_DEVICE_ERROR; =20 if (rsp_data->status) { dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n", __func__, rsp_data->status); - efi_status =3D qsee_uefi_status_to_efi(rsp_data->status); + return qsee_uefi_status_to_efi(rsp_data->status); } =20 -out_free: - kfree(rsp_data); -out_free_req: - kfree(req_data); -out: - return efi_status; + return EFI_SUCCESS; } =20 static efi_status_t qsee_uefi_get_next_variable(struct qcuefi_client *qcue= fi, unsigned long *name_size, efi_char16_t *name, efi_guid_t *guid) { - struct qsee_req_uefi_get_next_variable *req_data; - struct qsee_rsp_uefi_get_next_variable *rsp_data; - efi_status_t efi_status =3D EFI_SUCCESS; + struct qsee_req_uefi_get_next_variable *req_data __free(qcom_tzmem) =3D N= ULL; + struct qsee_rsp_uefi_get_next_variable *rsp_data __free(qcom_tzmem) =3D N= ULL; + efi_status_t efi_status; size_t guid_offs; size_t name_offs; size_t req_size; @@ -545,17 +508,13 @@ static efi_status_t qsee_uefi_get_next_variable(struc= t qcuefi_client *qcuefi, __array(*name, *name_size / sizeof(*name)) ); =20 - req_data =3D kzalloc(req_size, GFP_KERNEL); - if (!req_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out; - } + req_data =3D qcom_tzmem_alloc(qcuefi->mempool, req_size, GFP_KERNEL); + if (!req_data) + return EFI_OUT_OF_RESOURCES; =20 - rsp_data =3D kzalloc(rsp_size, GFP_KERNEL); - if (!rsp_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out_free_req; - } + rsp_data =3D qcom_tzmem_alloc(qcuefi->mempool, rsp_size, GFP_KERNEL); + if (!rsp_data) + return EFI_OUT_OF_RESOURCES; =20 req_data->command_id =3D QSEE_CMD_UEFI_GET_NEXT_VARIABLE; req_data->guid_offset =3D guid_offs; @@ -567,26 +526,18 @@ static efi_status_t qsee_uefi_get_next_variable(struc= t qcuefi_client *qcuefi, memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_s= ize); status =3D ucs2_strscpy(((void *)req_data) + req_data->name_offset, name, *name_size / sizeof(*name)); - if (status < 0) { - efi_status =3D EFI_INVALID_PARAMETER; - goto out_free; - } + if (status < 0) + return EFI_INVALID_PARAMETER; =20 status =3D qcom_qseecom_app_send(qcuefi->client, req_data, req_size, rsp_= data, rsp_size); - if (status) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (status) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->command_id !=3D QSEE_CMD_UEFI_GET_NEXT_VARIABLE) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->command_id !=3D QSEE_CMD_UEFI_GET_NEXT_VARIABLE) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->length < sizeof(*rsp_data)) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->length < sizeof(*rsp_data)) + return EFI_DEVICE_ERROR; =20 if (rsp_data->status) { dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n", @@ -601,77 +552,59 @@ static efi_status_t qsee_uefi_get_next_variable(struc= t qcuefi_client *qcuefi, if (efi_status =3D=3D EFI_BUFFER_TOO_SMALL) *name_size =3D rsp_data->name_size; =20 - goto out_free; + return efi_status; } =20 - if (rsp_data->length > rsp_size) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->length > rsp_size) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->name_offset + rsp_data->name_size > rsp_data->length) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->name_offset + rsp_data->name_size > rsp_data->length) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->guid_offset + rsp_data->guid_size > rsp_data->length) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->guid_offset + rsp_data->guid_size > rsp_data->length) + return EFI_DEVICE_ERROR; =20 if (rsp_data->name_size > *name_size) { *name_size =3D rsp_data->name_size; - efi_status =3D EFI_BUFFER_TOO_SMALL; - goto out_free; + return EFI_BUFFER_TOO_SMALL; } =20 - if (rsp_data->guid_size !=3D sizeof(*guid)) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->guid_size !=3D sizeof(*guid)) + return EFI_DEVICE_ERROR; =20 memcpy(guid, ((void *)rsp_data) + rsp_data->guid_offset, rsp_data->guid_s= ize); status =3D ucs2_strscpy(name, ((void *)rsp_data) + rsp_data->name_offset, rsp_data->name_size / sizeof(*name)); *name_size =3D rsp_data->name_size; =20 - if (status < 0) { + if (status < 0) /* * Return EFI_DEVICE_ERROR here because the buffer size should * have already been validated above, causing this function to * bail with EFI_BUFFER_TOO_SMALL. */ - efi_status =3D EFI_DEVICE_ERROR; - } + return EFI_DEVICE_ERROR; =20 -out_free: - kfree(rsp_data); -out_free_req: - kfree(req_data); -out: - return efi_status; + return EFI_SUCCESS; } =20 static efi_status_t qsee_uefi_query_variable_info(struct qcuefi_client *qc= uefi, u32 attr, u64 *storage_space, u64 *remaining_space, u64 *max_variable_size) { - struct qsee_req_uefi_query_variable_info *req_data; - struct qsee_rsp_uefi_query_variable_info *rsp_data; - efi_status_t efi_status =3D EFI_SUCCESS; + struct qsee_req_uefi_query_variable_info *req_data __free(qcom_tzmem) =3D= NULL; + struct qsee_rsp_uefi_query_variable_info *rsp_data __free(qcom_tzmem) =3D= NULL; int status; =20 - req_data =3D kzalloc(sizeof(*req_data), GFP_KERNEL); - if (!req_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out; - } + req_data =3D qcom_tzmem_alloc(qcuefi->mempool, sizeof(*req_data), + GFP_KERNEL); + if (!req_data) + return EFI_OUT_OF_RESOURCES; =20 - rsp_data =3D kzalloc(sizeof(*rsp_data), GFP_KERNEL); - if (!rsp_data) { - efi_status =3D EFI_OUT_OF_RESOURCES; - goto out_free_req; - } + rsp_data =3D qcom_tzmem_alloc(qcuefi->mempool, sizeof(*rsp_data), + GFP_KERNEL); + if (!rsp_data) + return EFI_OUT_OF_RESOURCES; =20 req_data->command_id =3D QSEE_CMD_UEFI_QUERY_VARIABLE_INFO; req_data->attributes =3D attr; @@ -679,26 +612,19 @@ static efi_status_t qsee_uefi_query_variable_info(str= uct qcuefi_client *qcuefi, =20 status =3D qcom_qseecom_app_send(qcuefi->client, req_data, sizeof(*req_da= ta), rsp_data, sizeof(*rsp_data)); - if (status) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (status) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->command_id !=3D QSEE_CMD_UEFI_QUERY_VARIABLE_INFO) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->command_id !=3D QSEE_CMD_UEFI_QUERY_VARIABLE_INFO) + return EFI_DEVICE_ERROR; =20 - if (rsp_data->length !=3D sizeof(*rsp_data)) { - efi_status =3D EFI_DEVICE_ERROR; - goto out_free; - } + if (rsp_data->length !=3D sizeof(*rsp_data)) + return EFI_DEVICE_ERROR; =20 if (rsp_data->status) { dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n", __func__, rsp_data->status); - efi_status =3D qsee_uefi_status_to_efi(rsp_data->status); - goto out_free; + return qsee_uefi_status_to_efi(rsp_data->status); } =20 if (storage_space) @@ -710,12 +636,7 @@ static efi_status_t qsee_uefi_query_variable_info(stru= ct qcuefi_client *qcuefi, if (max_variable_size) *max_variable_size =3D rsp_data->max_variable_size; =20 -out_free: - kfree(rsp_data); -out_free_req: - kfree(req_data); -out: - return efi_status; + return EFI_SUCCESS; } =20 /* -- Global efivar interface. -------------------------------------------= --- */ @@ -844,6 +765,10 @@ static int qcom_uefisecapp_probe(struct auxiliary_devi= ce *aux_dev, if (status) qcuefi_set_reference(NULL); =20 + qcuefi->mempool =3D devm_qcom_tzmem_pool_new(&aux_dev->dev, SZ_256K); + if (IS_ERR(qcuefi->mempool)) + return PTR_ERR(qcuefi->mempool); + return status; } =20 diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 3a6cefb4eb2e..318d7d398e5f 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1567,9 +1567,9 @@ EXPORT_SYMBOL_GPL(qcom_scm_qseecom_app_get_id); /** * qcom_scm_qseecom_app_send() - Send to and receive data from a given QSE= E app. * @app_id: The ID of the target app. - * @req: Request buffer sent to the app (must be DMA-mappable). + * @req: Request buffer sent to the app (must be TZ memory) * @req_size: Size of the request buffer. - * @rsp: Response buffer, written to by the app (must be DMA-mappable= ). + * @rsp: Response buffer, written to by the app (must be TZ memory) * @rsp_size: Size of the response buffer. * * Sends a request to the QSEE app associated with the given ID and read b= ack @@ -1585,26 +1585,12 @@ int qcom_scm_qseecom_app_send(u32 app_id, void *req= , size_t req_size, void *rsp, { struct qcom_scm_qseecom_resp res =3D {}; struct qcom_scm_desc desc =3D {}; - dma_addr_t req_phys; - dma_addr_t rsp_phys; + phys_addr_t req_phys; + phys_addr_t rsp_phys; int status; =20 - /* Map request buffer */ - req_phys =3D dma_map_single(__scm->dev, req, req_size, DMA_TO_DEVICE); - status =3D dma_mapping_error(__scm->dev, req_phys); - if (status) { - dev_err(__scm->dev, "qseecom: failed to map request buffer\n"); - return status; - } - - /* Map response buffer */ - rsp_phys =3D dma_map_single(__scm->dev, rsp, rsp_size, DMA_FROM_DEVICE); - status =3D dma_mapping_error(__scm->dev, rsp_phys); - if (status) { - dma_unmap_single(__scm->dev, req_phys, req_size, DMA_TO_DEVICE); - dev_err(__scm->dev, "qseecom: failed to map response buffer\n"); - return status; - } + req_phys =3D qcom_tzmem_to_phys(req); + rsp_phys =3D qcom_tzmem_to_phys(rsp); =20 /* Set up SCM call data */ desc.owner =3D QSEECOM_TZ_OWNER_TZ_APPS; @@ -1622,10 +1608,6 @@ int qcom_scm_qseecom_app_send(u32 app_id, void *req,= size_t req_size, void *rsp, /* Perform call */ status =3D qcom_scm_qseecom_call(&desc, &res); =20 - /* Unmap buffers */ - dma_unmap_single(__scm->dev, rsp_phys, rsp_size, DMA_FROM_DEVICE); - dma_unmap_single(__scm->dev, req_phys, req_size, DMA_TO_DEVICE); - if (status) return status; =20 diff --git a/include/linux/firmware/qcom/qcom_qseecom.h b/include/linux/fir= mware/qcom/qcom_qseecom.h index 5c28298a98be..e868fac55675 100644 --- a/include/linux/firmware/qcom/qcom_qseecom.h +++ b/include/linux/firmware/qcom/qcom_qseecom.h @@ -27,9 +27,9 @@ struct qseecom_client { /** * qcom_qseecom_app_send() - Send to and receive data from a given QSEE ap= p. * @client: The QSEECOM client associated with the target app. - * @req: Request buffer sent to the app (must be DMA-mappable). + * @req: Request buffer sent to the app (must be TZ memory). * @req_size: Size of the request buffer. - * @rsp: Response buffer, written to by the app (must be DMA-mappable= ). + * @rsp: Response buffer, written to by the app (must be TZ memory). * @rsp_size: Size of the response buffer. * * Sends a request to the QSEE app associated with the given client and re= ad --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87F86C4167B for ; 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Mon, 27 Nov 2023 06:16:21 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:21 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 10/13] firmware: qcom: scm: add support for SHM bridge operations Date: Mon, 27 Nov 2023 15:15:57 +0100 Message-Id: <20231127141600.20929-11-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Add low-level primitives for enabling SHM bridge support as well as creating and destroying SHM bridge pools to qcom-scm. Signed-off-by: Bartosz Golaszewski Acked-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/qcom_scm.c | 60 ++++++++++++++++++++++++++ drivers/firmware/qcom/qcom_scm.h | 3 ++ include/linux/firmware/qcom/qcom_scm.h | 6 +++ 3 files changed, 69 insertions(+) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 318d7d398e5f..839773270a21 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1323,6 +1323,66 @@ bool qcom_scm_lmh_dcvsh_available(void) } EXPORT_SYMBOL_GPL(qcom_scm_lmh_dcvsh_available); =20 +int qcom_scm_shm_bridge_enable(void) +{ + struct qcom_scm_desc desc =3D { + .svc =3D QCOM_SCM_SVC_MP, + .cmd =3D QCOM_SCM_MP_SHM_BRIDGE_ENABLE, + .owner =3D ARM_SMCCC_OWNER_SIP + }; + + struct qcom_scm_res res; + + if (!__qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_MP, + QCOM_SCM_MP_SHM_BRIDGE_ENABLE)) + return -EOPNOTSUPP; + + return qcom_scm_call(__scm->dev, &desc, &res) ?: res.result[0]; +} +EXPORT_SYMBOL_GPL(qcom_scm_shm_bridge_enable); + +int qcom_scm_shm_bridge_create(struct device *dev, u64 pfn_and_ns_perm_fla= gs, + u64 ipfn_and_s_perm_flags, u64 size_and_flags, + u64 ns_vmids, u64 *handle) +{ + struct qcom_scm_desc desc =3D { + .svc =3D QCOM_SCM_SVC_MP, + .cmd =3D QCOM_SCM_MP_SHM_BRIDGE_CREATE, + .owner =3D ARM_SMCCC_OWNER_SIP, + .args[0] =3D pfn_and_ns_perm_flags, + .args[1] =3D ipfn_and_s_perm_flags, + .args[2] =3D size_and_flags, + .args[3] =3D ns_vmids, + .arginfo =3D QCOM_SCM_ARGS(4, QCOM_SCM_VAL, QCOM_SCM_VAL, + QCOM_SCM_VAL, QCOM_SCM_VAL), + }; + + struct qcom_scm_res res; + int ret; + + ret =3D qcom_scm_call(__scm->dev, &desc, &res); + + if (handle && !ret) + *handle =3D res.result[1]; + + return ret ?: res.result[0]; +} +EXPORT_SYMBOL_GPL(qcom_scm_shm_bridge_create); + +int qcom_scm_shm_bridge_delete(struct device *dev, u64 handle) +{ + struct qcom_scm_desc desc =3D { + .svc =3D QCOM_SCM_SVC_MP, + .cmd =3D QCOM_SCM_MP_SHM_BRIDGE_DELETE, + .owner =3D ARM_SMCCC_OWNER_SIP, + .args[0] =3D handle, + .arginfo =3D QCOM_SCM_ARGS(1, QCOM_SCM_VAL), + }; + + return qcom_scm_call(__scm->dev, &desc, NULL); +} +EXPORT_SYMBOL_GPL(qcom_scm_shm_bridge_delete); + int qcom_scm_lmh_profile_change(u32 profile_id) { struct qcom_scm_desc desc =3D { diff --git a/drivers/firmware/qcom/qcom_scm.h b/drivers/firmware/qcom/qcom_= scm.h index aa7d06939f8e..cb7273aa0a5e 100644 --- a/drivers/firmware/qcom/qcom_scm.h +++ b/drivers/firmware/qcom/qcom_scm.h @@ -116,6 +116,9 @@ struct qcom_tzmem_pool *qcom_scm_get_tzmem_pool(void); #define QCOM_SCM_MP_IOMMU_SET_CP_POOL_SIZE 0x05 #define QCOM_SCM_MP_VIDEO_VAR 0x08 #define QCOM_SCM_MP_ASSIGN 0x16 +#define QCOM_SCM_MP_SHM_BRIDGE_ENABLE 0x1c +#define QCOM_SCM_MP_SHM_BRIDGE_DELETE 0x1d +#define QCOM_SCM_MP_SHM_BRIDGE_CREATE 0x1e =20 #define QCOM_SCM_SVC_OCMEM 0x0f #define QCOM_SCM_OCMEM_LOCK_CMD 0x01 diff --git a/include/linux/firmware/qcom/qcom_scm.h b/include/linux/firmwar= e/qcom/qcom_scm.h index ccaf28846054..9b6054813f59 100644 --- a/include/linux/firmware/qcom/qcom_scm.h +++ b/include/linux/firmware/qcom/qcom_scm.h @@ -115,6 +115,12 @@ int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg= , u32 payload_val, int qcom_scm_lmh_profile_change(u32 profile_id); bool qcom_scm_lmh_dcvsh_available(void); =20 +int qcom_scm_shm_bridge_enable(void); +int qcom_scm_shm_bridge_create(struct device *dev, u64 pfn_and_ns_perm_fla= gs, + u64 ipfn_and_s_perm_flags, u64 size_and_flags, + u64 ns_vmids, u64 *handle); +int qcom_scm_shm_bridge_delete(struct device *dev, u64 handle); + #ifdef CONFIG_QCOM_QSEECOM =20 int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id); --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE5FBC4167B for ; Mon, 27 Nov 2023 14:19:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233759AbjK0OTt (ORCPT ); Mon, 27 Nov 2023 09:19:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233753AbjK0OSv (ORCPT ); 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Mon, 27 Nov 2023 06:16:23 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:22 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 11/13] firmware: qcom: tzmem: enable SHM Bridge support Date: Mon, 27 Nov 2023 15:15:58 +0100 Message-Id: <20231127141600.20929-12-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Add a new Kconfig option for selecting the SHM Bridge mode of operation for the TrustZone memory allocator. If enabled at build-time, it will still be checked for availability at run-time. If the architecture doesn't support SHM Bridge, the allocator will work just like in the default mode. Signed-off-by: Bartosz Golaszewski Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/Kconfig | 10 +++++ drivers/firmware/qcom/qcom_tzmem.c | 65 +++++++++++++++++++++++++++++- 2 files changed, 74 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/qcom/Kconfig b/drivers/firmware/qcom/Kconfig index 237da40de832..e01407e31ae4 100644 --- a/drivers/firmware/qcom/Kconfig +++ b/drivers/firmware/qcom/Kconfig @@ -27,6 +27,16 @@ config QCOM_TZMEM_MODE_DEFAULT Use the default allocator mode. The memory is page-aligned, non-cachable and contiguous. =20 +config QCOM_TZMEM_MODE_SHMBRIDGE + bool "SHM Bridge" + help + Use Qualcomm Shared Memory Bridge. The memory has the same alignment as + in the 'Default' allocator but is also explicitly marked as an SHM Brid= ge + buffer. + + With this selected, all buffers passed to the TrustZone must be allocat= ed + using the TZMem allocator or else the TrustZone will refuse to use them. + endchoice =20 config QCOM_SCM_DOWNLOAD_MODE_DEFAULT diff --git a/drivers/firmware/qcom/qcom_tzmem.c b/drivers/firmware/qcom/qco= m_tzmem.c index 44a062f2abd4..1ca3773263e5 100644 --- a/drivers/firmware/qcom/qcom_tzmem.c +++ b/drivers/firmware/qcom/qcom_tzmem.c @@ -55,7 +55,70 @@ static void qcom_tzmem_cleanup_pool(struct qcom_tzmem_po= ol *pool) =20 } =20 -#endif /* CONFIG_QCOM_TZMEM_MODE_DEFAULT */ +#elif IS_ENABLED(CONFIG_QCOM_TZMEM_MODE_SHMBRIDGE) + +#include + +#define QCOM_SHM_BRIDGE_NUM_VM_SHIFT 9 + +static bool qcom_tzmem_using_shm_bridge; + +static int qcom_tzmem_init(void) +{ + int ret; + + ret =3D qcom_scm_shm_bridge_enable(); + if (ret =3D=3D -EOPNOTSUPP) { + dev_info(qcom_tzmem_dev, "SHM Bridge not supported\n"); + return 0; + } + + if (!ret) + qcom_tzmem_using_shm_bridge =3D true; + + return ret; +} + +static int qcom_tzmem_init_pool(struct qcom_tzmem_pool *pool) +{ + u64 pfn_and_ns_perm, ipfn_and_s_perm, size_and_flags, ns_perms; + int ret; + + if (!qcom_tzmem_using_shm_bridge) + return 0; + + ns_perms =3D (QCOM_SCM_PERM_WRITE | QCOM_SCM_PERM_READ); + pfn_and_ns_perm =3D (u64)pool->pbase | ns_perms; + ipfn_and_s_perm =3D (u64)pool->pbase | ns_perms; + size_and_flags =3D pool->size | (1 << QCOM_SHM_BRIDGE_NUM_VM_SHIFT); + + u64 *handle __free(kfree) =3D kzalloc(sizeof(*handle), GFP_KERNEL); + if (!handle) + return -ENOMEM; + + ret =3D qcom_scm_shm_bridge_create(qcom_tzmem_dev, pfn_and_ns_perm, + ipfn_and_s_perm, size_and_flags, + QCOM_SCM_VMID_HLOS, handle); + if (ret) + return ret; + + pool->priv =3D no_free_ptr(handle); + + return 0; +} + +static void qcom_tzmem_cleanup_pool(struct qcom_tzmem_pool *pool) +{ + u64 *handle =3D pool->priv; + + if (!qcom_tzmem_using_shm_bridge) + return; + + qcom_scm_shm_bridge_delete(qcom_tzmem_dev, *handle); + kfree(handle); +} + +#endif /* CONFIG_QCOM_TZMEM_MODE_SHMBRIDGE */ =20 /** * qcom_tzmem_pool_new() - Create a new TZ memory pool. --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBB7DC4167B for ; Mon, 27 Nov 2023 14:20:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233842AbjK0OTv (ORCPT ); Mon, 27 Nov 2023 09:19:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46640 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233762AbjK0OSv (ORCPT ); Mon, 27 Nov 2023 09:18:51 -0500 Received: from mail-lj1-x232.google.com (mail-lj1-x232.google.com [IPv6:2a00:1450:4864:20::232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1E1C3C22 for ; Mon, 27 Nov 2023 06:16:26 -0800 (PST) Received: by mail-lj1-x232.google.com with SMTP id 38308e7fff4ca-2c5056059e0so55266601fa.3 for ; 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Mon, 27 Nov 2023 06:16:23 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 12/13] firmware: qcom: scm: clarify the comment in qcom_scm_pas_init_image() Date: Mon, 27 Nov 2023 15:15:59 +0100 Message-Id: <20231127141600.20929-13-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski The "memory protection" mechanism mentioned in the comment is the SHM Bridge. This is also the reason why we do not convert this call to using the TZ memory allocator. Signed-off-by: Bartosz Golaszewski Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- drivers/firmware/qcom/qcom_scm.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 839773270a21..7ba5cff6e4e7 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -563,9 +563,13 @@ int qcom_scm_pas_init_image(u32 peripheral, const void= *metadata, size_t size, struct qcom_scm_res res; =20 /* - * During the scm call memory protection will be enabled for the meta - * data blob, so make sure it's physically contiguous, 4K aligned and - * non-cachable to avoid XPU violations. + * During the SCM call the hypervisor will make the buffer containing + * the program data into an SHM Bridge. This is why we exceptionally + * must not use the TrustZone memory allocator here as - depending on + * Kconfig - it may already use the SHM Bridge mechanism internally. + * + * If we pass a buffer that is already part of an SHM Bridge to this + * call, it will fail. */ mdata_buf =3D dma_alloc_coherent(__scm->dev, size, &mdata_phys, GFP_KERNEL); --=20 2.40.1 From nobody Wed Dec 17 12:17:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2C43C4167B for ; Mon, 27 Nov 2023 14:20:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233847AbjK0OTz (ORCPT ); Mon, 27 Nov 2023 09:19:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231689AbjK0OSv (ORCPT ); Mon, 27 Nov 2023 09:18:51 -0500 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6281F3C31 for ; Mon, 27 Nov 2023 06:16:27 -0800 (PST) Received: by mail-wm1-x336.google.com with SMTP id 5b1f17b1804b1-40b3e7f2fd9so17370865e9.0 for ; Mon, 27 Nov 2023 06:16:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1701094586; x=1701699386; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=CFfJP54/xc7BHA8KKJGYnGca16T3qiUmmV3jKwTKBQY=; b=cRAMTeieivsjBt3avR+Ku8wbD7USPcTI+VQgBm1XvLzK/brMTu3AP8cO5HzIpey8HI Bf7gLKsxI+jTcFKYnhoATmSYZkQnHfoqq/Q04pWBNzo4+wDdysgNZppkncwHk7eiVK1X 5Aidk6/DLkDndCHIYPVU46XRgH1rjdiBrTXTY0y4k5SXm/o/IYvkdtwQTzY2OvSN76uq e8zP7dnMUIO4teYD+KL2Ne72K0+bSKNYZh+FWYPNfw+alDQhkZb39FlmOgIwjJ1jPKTI 5WVE8PrTn5gGRJq+t5wMgD3GdO2by596Xc0KCRZYTYamq9FxuSGJT0FW848qK18b8oap KiFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701094586; x=1701699386; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CFfJP54/xc7BHA8KKJGYnGca16T3qiUmmV3jKwTKBQY=; b=sqhsO9T+WuTKFF+A7fdLbCYhQmzjKf6hBAa9fOXF9GZBii2+v1sWsRr9bjtSJ4Ue8w m7Gd6JINUjX42XijomloouOZJ8XyzQaaCwT5fcig9aYdmNsTeZL3cbGXTzboUdtZSwHs yIDqsokRtPIUTVHUCmUBGFs+DBAWoCjkR9Ezqvw1LAOG+RpIYuNIBZBkqtk380pMcHdK aUkbRXMl0tAA7Bzn2pKGmAM6u6+oaMwEB82FCjAQOpbkiMuaU3wpHz5eilcLlVx9Jh5G WqOKIz+uJSeYhwDIjVnKqkehKw1il4sxBcIC1KLPy/MaKf/icgExU6GWkYXUh0Gi+yaM qRyg== X-Gm-Message-State: AOJu0YzP4SQ+PYm8Wkt2ShG/z5HJy7koY5/JgL0hecy/ljyLVA65/DCU n8CIYz/6y3CEbSyId0QUEvWzWw== X-Google-Smtp-Source: AGHT+IEIgowsVDZas+3HVfgHYGIPV66wNOaSjrs3VAw1BwpW78zUkRBqHRUWw0OYTYY+L65OxkyE0Q== X-Received: by 2002:a05:600c:600a:b0:40b:32e7:2e89 with SMTP id az10-20020a05600c600a00b0040b32e72e89mr8536462wmb.18.1701094585913; Mon, 27 Nov 2023 06:16:25 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:25 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 13/13] arm64: defconfig: enable SHM Bridge support for the TZ memory allocator Date: Mon, 27 Nov 2023 15:16:00 +0100 Message-Id: <20231127141600.20929-14-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bartosz Golaszewski Enable SHM Bridge support in the Qualcomm TrustZone allocator by default as even on architectures that don't support it, we automatically fall back to the default behavior. Signed-off-by: Bartosz Golaszewski Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s Reviewed-by: Elliot Berman Tested-by: Deepti Jaggi #sa8775p-ride --- arch/arm64/configs/defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index b60aa1f89343..5380e78087a7 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -255,6 +255,7 @@ CONFIG_INTEL_STRATIX10_RSU=3Dm CONFIG_EFI_CAPSULE_LOADER=3Dy CONFIG_IMX_SCU=3Dy CONFIG_IMX_SCU_PD=3Dy +CONFIG_QCOM_TZMEM_MODE_SHMBRIDGE=3Dy CONFIG_GNSS=3Dm CONFIG_GNSS_MTK_SERIAL=3Dm CONFIG_MTD=3Dy --=20 2.40.1