From patchwork Tue Oct 24 15:52:24 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dwivedi, Avaneesh Kumar (avani)" X-Patchwork-Id: 10025045 X-Patchwork-Delegate: agross@codeaurora.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D4F766035E for ; Tue, 24 Oct 2017 15:53:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C7B7928A2A for ; Tue, 24 Oct 2017 15:53:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BC44B28A2C; Tue, 24 Oct 2017 15:53:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2E27C28A30 for ; Tue, 24 Oct 2017 15:53:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751903AbdJXPxW (ORCPT ); Tue, 24 Oct 2017 11:53:22 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:56256 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751855AbdJXPwn (ORCPT ); Tue, 24 Oct 2017 11:52:43 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 26D93607B5; Tue, 24 Oct 2017 15:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1508860362; bh=LrT2cVeRJv797eEjXBfJ+I1HWbfSPO7A0fbf1dKmqr8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wkjsh4J0tlRAHVHfcLVmcZ53ADUUKPX+HXl0i1ryv58tZqnLCMlEzawb9z4FJcJHt 6CdXc7xK1s4BVjfggHZ0ne5bYrS0v7okh0CH56FGq631CRA9zCw+fBL9P4btm7pnmG EmvzvXwsPcH29971HjQJE1+NZKYVZNpm893gpHmE= Received: from akdwived-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: akdwived@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 3F73A60112; Tue, 24 Oct 2017 15:52:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1508860361; bh=LrT2cVeRJv797eEjXBfJ+I1HWbfSPO7A0fbf1dKmqr8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z7MpPqFVIuYyzHoWInCAkUaOS8ulQc+kugMGy6loI/17B79yah8NGH5B7S3i2b82s gL14kAZDchv/TVQl+7nVnzSdk6PBlKAC2laOm0GJEdqsH1SNZgG9C4nOlnL7BgCEjE ObQgDlddXYLHNrAT3qCGg2ICxG0/FHHY88gMZEpk= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3F73A60112 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=akdwived@codeaurora.org From: Avaneesh Kumar Dwivedi To: bjorn.andersson@linaro.org Cc: sboyd@codeaurora.org, agross@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org, Avaneesh Kumar Dwivedi Subject: [PATCH v8 1/4] firmware: scm: Add new SCM call API for switching memory ownership Date: Tue, 24 Oct 2017 21:22:24 +0530 Message-Id: <1508860347-25181-2-git-send-email-akdwived@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1508860347-25181-1-git-send-email-akdwived@codeaurora.org> References: <1508860347-25181-1-git-send-email-akdwived@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Two different processors on a SOC need to switch memory ownership during load/unload. To enable this, second level memory map table need to be updated, which is done by secure layer. This patch adds the interface for making secure monitor call for memory ownership switching request. Signed-off-by: Avaneesh Kumar Dwivedi Acked-by: Andy Gross --- drivers/firmware/qcom_scm-32.c | 7 +++ drivers/firmware/qcom_scm-64.c | 27 ++++++++++++ drivers/firmware/qcom_scm.c | 98 ++++++++++++++++++++++++++++++++++++++++++ drivers/firmware/qcom_scm.h | 5 +++ include/linux/qcom_scm.h | 16 +++++++ 5 files changed, 153 insertions(+) diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c index 93e3b96..758b910 100644 --- a/drivers/firmware/qcom_scm-32.c +++ b/drivers/firmware/qcom_scm-32.c @@ -596,3 +596,10 @@ int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size, { return -ENODEV; } + +int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region, + size_t mem_sz, phys_addr_t src, size_t src_sz, + phys_addr_t dest, size_t dest_sz) +{ + return -ENODEV; +} diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c index 6e6d561..6bdbeae 100644 --- a/drivers/firmware/qcom_scm-64.c +++ b/drivers/firmware/qcom_scm-64.c @@ -439,3 +439,30 @@ int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size, return ret; } + +int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region, + size_t mem_sz, phys_addr_t src, size_t src_sz, + phys_addr_t dest, size_t dest_sz) +{ + int ret; + struct qcom_scm_desc desc = {0}; + struct arm_smccc_res res; + + desc.args[0] = mem_region; + desc.args[1] = mem_sz; + desc.args[2] = src; + desc.args[3] = src_sz; + desc.args[4] = dest; + desc.args[5] = dest_sz; + desc.args[6] = 0; + + desc.arginfo = QCOM_SCM_ARGS(7, QCOM_SCM_RO, QCOM_SCM_VAL, + QCOM_SCM_RO, QCOM_SCM_VAL, QCOM_SCM_RO, + QCOM_SCM_VAL, QCOM_SCM_VAL); + + ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP, + QCOM_MEM_PROT_ASSIGN_ID, + &desc, &res); + + return ret ? : res.a1; +} diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index bb16510..0511af98 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -40,6 +40,19 @@ struct qcom_scm { struct reset_controller_dev reset; }; +struct qcom_scm_current_perm_info { + __le32 vmid; + __le32 perm; + __le64 ctx; + __le32 ctx_size; + __le32 unused; +}; + +struct qcom_scm_mem_map_info { + __le64 mem_addr; + __le64 mem_size; +}; + static struct qcom_scm *__scm; static int qcom_scm_clk_enable(void) @@ -292,6 +305,91 @@ int qcom_scm_pas_shutdown(u32 peripheral) } EXPORT_SYMBOL(qcom_scm_pas_shutdown); +/** + * qcom_scm_assign_mem() - Make a secure call to reassign memory ownership + * + * @mem_addr: mem region whose ownership need to be reassigned + * @mem_sz: size of the region. + * @srcvm: vmid for current set of owners, each set bit in + * flag indicate a unique owner + * @newvm: array having new owners and corrsponding permission + * flags + * @dest_cnt: number of owners in next set. + * Return next set of owners on success. + */ +int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz, + unsigned int *srcvm, + struct qcom_scm_vmperm *newvm, int dest_cnt) +{ + struct qcom_scm_current_perm_info *destvm; + struct qcom_scm_mem_map_info *mem_to_map; + phys_addr_t mem_to_map_phys; + phys_addr_t dest_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; + int len; + int i; + + src_sz = hweight_long(*srcvm) * sizeof(*src); + mem_to_map_sz = sizeof(*mem_to_map); + dest_sz = dest_cnt * sizeof(*destvm); + ptr_sz = ALIGN(src_sz, SZ_64) + ALIGN(mem_to_map_sz, SZ_64) + + ALIGN(dest_sz, SZ_64); + + ptr = dma_alloc_coherent(__scm->dev, ptr_sz, &ptr_phys, GFP_KERNEL); + + if (!ptr) + return -ENOMEM; + + /* Fill source vmid detail */ + src = ptr; + len = hweight_long(*srcvm); + for (i = 0; i < len; i++) { + src[i] = cpu_to_le32(ffs(*srcvm) - 1); + *srcvm ^= 1 << (ffs(*srcvm) - 1); + } + + /* Fill details of mem buff to map */ + mem_to_map = ptr + ALIGN(src_sz, SZ_64); + mem_to_map_phys = ptr_phys + ALIGN(src_sz, SZ_64); + mem_to_map[0].mem_addr = cpu_to_le64(mem_addr); + mem_to_map[0].mem_size = cpu_to_le64(mem_sz); + + next_vm = 0; + /* Fill details of next vmid detail */ + destvm = ptr + ALIGN(mem_to_map_sz, SZ_64) + ALIGN(src_sz, SZ_64); + dest_phys = ptr_phys + ALIGN(src_sz, SZ_64) + + ALIGN(mem_to_map_sz, SZ_64); + for (i = 0; i < dest_cnt; i++) { + destvm[i].vmid = cpu_to_le32(newvm[i].vmid); + destvm[i].perm = cpu_to_le32(newvm[i].perm); + destvm[i].ctx = 0; + destvm[i].ctx_size = 0; + next_vm |= BIT(newvm[i].vmid); + } + + ret = __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, ALIGN(ptr_sz, SZ_64), + ptr, ptr_phys); + if (ret) { + dev_err(__scm->dev, + "Assign memory protection call failed %d.\n", ret); + return -EINVAL; + } + + *srcvm = next_vm; + return 0; +} +EXPORT_SYMBOL(qcom_scm_assign_mem); + static int qcom_scm_pas_reset_assert(struct reset_controller_dev *rcdev, unsigned long idx) { diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h index 9bea691..fe54b7b 100644 --- a/drivers/firmware/qcom_scm.h +++ b/drivers/firmware/qcom_scm.h @@ -95,5 +95,10 @@ extern int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare, size_t *size); extern int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size, u32 spare); +#define QCOM_MEM_PROT_ASSIGN_ID 0x16 +extern int __qcom_scm_assign_mem(struct device *dev, + phys_addr_t mem_region, size_t mem_sz, + phys_addr_t src, size_t src_sz, + phys_addr_t dest, size_t dest_sz); #endif diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h index e538047..6f8da9e 100644 --- a/include/linux/qcom_scm.h +++ b/include/linux/qcom_scm.h @@ -23,6 +23,19 @@ struct qcom_scm_hdcp_req { u32 val; }; +struct qcom_scm_vmperm { + int vmid; + int perm; +}; + +#define QCOM_SCM_VMID_HLOS 0x3 +#define QCOM_SCM_VMID_MSS_MSA 0xF +#define QCOM_SCM_PERM_READ 0x4 +#define QCOM_SCM_PERM_WRITE 0x2 +#define QCOM_SCM_PERM_EXEC 0x1 +#define QCOM_SCM_PERM_RW (QCOM_SCM_PERM_READ | QCOM_SCM_PERM_WRITE) +#define QCOM_SCM_PERM_RWX (QCOM_SCM_PERM_RW | QCOM_SCM_PERM_EXEC) + #if IS_ENABLED(CONFIG_QCOM_SCM) extern int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus); extern int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus); @@ -37,6 +50,9 @@ extern int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr, phys_addr_t size); extern int qcom_scm_pas_auth_and_reset(u32 peripheral); extern int qcom_scm_pas_shutdown(u32 peripheral); +extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz, + unsigned int *src, struct qcom_scm_vmperm *newvm, + int dest_cnt); extern void qcom_scm_cpu_power_down(u32 flags); extern u32 qcom_scm_get_version(void); extern int qcom_scm_set_remote_state(u32 state, u32 id);