From patchwork Mon Dec 19 22:58:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 635144 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 E89D5C4167B for ; Mon, 19 Dec 2022 23:03:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233056AbiLSXDD (ORCPT ); Mon, 19 Dec 2022 18:03:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55336 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232889AbiLSXBu (ORCPT ); Mon, 19 Dec 2022 18:01:50 -0500 Received: from alexa-out-sd-02.qualcomm.com (alexa-out-sd-02.qualcomm.com [199.106.114.39]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D72E01178; Mon, 19 Dec 2022 15:00:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1671490844; x=1703026844; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8UhbIO+bjFBQdkCiu8pP4FCYrwf/TNyQmQumJGPtH4E=; b=mqL+MaM0oAt3wNjvSQZPsr6lUcAJ7uwgwCDKimAPcvtu5OgzAZQ5jwl/ o+Qa91l9e1BnAH3t6V7gzcQ6yA+4xB7pdMZw3HEN5by5w7IGPS6vH3NDX NsBqsRVOg87nxXD3NRkPL9Tiv1fBP4kjzKqwn0yVYULq+IE08CZnn44MH c=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-02.qualcomm.com with ESMTP; 19 Dec 2022 15:00:43 -0800 X-QCInternal: smtphost Received: from nasanex01b.na.qualcomm.com ([10.46.141.250]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Dec 2022 15:00:43 -0800 Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Mon, 19 Dec 2022 15:00:42 -0800 From: Elliot Berman To: Bjorn Andersson , Andy Gross , Bjorn Andersson , Konrad Dybcio CC: Elliot Berman , Murali Nalajala , Trilok Soni , "Srivatsa Vaddagiri" , Carl van Schaik , Prakruthi Deepak Heragu , Arnd Bergmann , Greg Kroah-Hartman , Rob Herring , "Krzysztof Kozlowski" , Jonathan Corbet , Bagas Sanjaya , Catalin Marinas , Will Deacon , Jassi Brar , Sudeep Holla , Mark Rutland , Lorenzo Pieralisi , "Dmitry Baryshkov" , , , , , , Subject: [PATCH v8 19/28] firmware: qcom_scm: Register Gunyah platform ops Date: Mon, 19 Dec 2022 14:58:40 -0800 Message-ID: <20221219225850.2397345-20-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221219225850.2397345-1-quic_eberman@quicinc.com> References: <20221219225850.2397345-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nasanex01b.na.qualcomm.com (10.46.141.250) Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Qualcomm platforms have a firmware entity which performs access control to physical pages. Dynamically started Gunyah virtual machines use the QCOM_SCM_RM_MANAGED_VMID for access. Linux thus needs to assign access to the memory used by guest VMs. Gunyah doesn't do this operation for us since it is the current VM (typically VMID_HLOS) delegating the access and not Gunyah itself. Use the Gunyah platform ops to achieve this so that only Qualcomm platforms attempt to make the needed SCM calls. Co-developed-by: Prakruthi Deepak Heragu Signed-off-by: Prakruthi Deepak Heragu Signed-off-by: Elliot Berman --- drivers/firmware/Kconfig | 2 + drivers/firmware/qcom_scm.c | 95 +++++++++++++++++++++++++++++++++++++ 2 files changed, 97 insertions(+) diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index b59e3041fd62..b888068ff6f2 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -214,6 +214,8 @@ config MTK_ADSP_IPC config QCOM_SCM tristate + select VIRT_DRIVERS + select GUNYAH_PLATFORM_HOOKS config QCOM_SCM_DOWNLOAD_MODE_DEFAULT bool "Qualcomm download mode enabled by default" diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 92763dce6477..bebc848cd3c5 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "qcom_scm.h" @@ -27,6 +28,9 @@ module_param(download_mode, bool, 0); #define SCM_HAS_IFACE_CLK BIT(1) #define SCM_HAS_BUS_CLK BIT(2) +#define QCOM_SCM_RM_MANAGED_VMID 0x3A +#define QCOM_SCM_MAX_MANAGED_VMID 0x3F + struct qcom_scm { struct device *dev; struct clk *core_clk; @@ -1292,6 +1296,94 @@ int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg, u32 payload_val, } EXPORT_SYMBOL(qcom_scm_lmh_dcvsh); +static int qcom_scm_gh_rm_pre_mem_share(struct gh_rm_rpc *rm, struct gh_rm_mem_parcel *mem_parcel) +{ + struct qcom_scm_vmperm *new_perms; + u64 src, src_cpy; + int ret = 0, i, n; + + new_perms = kcalloc(mem_parcel->n_acl_entries, sizeof(*new_perms), GFP_KERNEL); + if (!new_perms) + return -ENOMEM; + + for (n = 0; n < mem_parcel->n_acl_entries; n++) { + if (mem_parcel->acl_entries[n].vmid <= QCOM_SCM_MAX_MANAGED_VMID) + new_perms[n].vmid = mem_parcel->acl_entries[n].vmid; + else + new_perms[n].vmid = QCOM_SCM_RM_MANAGED_VMID; + if (mem_parcel->acl_entries[n].perms & GH_RM_ACL_X) + new_perms[n].perm |= QCOM_SCM_PERM_EXEC; + if (mem_parcel->acl_entries[n].perms & GH_RM_ACL_W) + new_perms[n].perm |= QCOM_SCM_PERM_WRITE; + if (mem_parcel->acl_entries[n].perms & GH_RM_ACL_R) + new_perms[n].perm |= QCOM_SCM_PERM_READ; + } + + src = (1ull << QCOM_SCM_VMID_HLOS); + + for (i = 0; i < mem_parcel->n_mem_entries; i++) { + src_cpy = src; + ret = qcom_scm_assign_mem(mem_parcel->mem_entries[i].ipa_base, + mem_parcel->mem_entries[i].size, + &src_cpy, new_perms, mem_parcel->n_acl_entries); + if (ret) { + src = 0; + for (n = 0; n < mem_parcel->n_acl_entries; n++) { + if (mem_parcel->acl_entries[n].vmid <= QCOM_SCM_MAX_MANAGED_VMID) + src |= (1ull << mem_parcel->acl_entries[n].vmid); + else + src |= (1ull << QCOM_SCM_RM_MANAGED_VMID); + } + + new_perms[0].vmid = QCOM_SCM_VMID_HLOS; + + for (i--; i >= 0; i--) { + src_cpy = src; + ret = qcom_scm_assign_mem(mem_parcel->mem_entries[i].ipa_base, + mem_parcel->mem_entries[i].size, + &src_cpy, new_perms, 1); + WARN_ON_ONCE(ret); + } + break; + } + } + + kfree(new_perms); + return ret; +} + +static int qcom_scm_gh_rm_post_mem_reclaim(struct gh_rm_rpc *rm, + struct gh_rm_mem_parcel *mem_parcel) +{ + struct qcom_scm_vmperm new_perms; + u64 src = 0; + int ret = 0, i, n; + + new_perms.vmid = QCOM_SCM_VMID_HLOS; + new_perms.perm = QCOM_SCM_PERM_EXEC | QCOM_SCM_PERM_WRITE | QCOM_SCM_PERM_READ; + + for (n = 0; n < mem_parcel->n_acl_entries; n++) { + if (mem_parcel->acl_entries[n].vmid <= QCOM_SCM_MAX_MANAGED_VMID) + src |= (1ull << mem_parcel->acl_entries[n].vmid); + else + src |= (1ull << QCOM_SCM_RM_MANAGED_VMID); + } + + for (i = 0; i < mem_parcel->n_mem_entries; i++) { + ret = qcom_scm_assign_mem(mem_parcel->mem_entries[i].ipa_base, + mem_parcel->mem_entries[i].size, + &src, &new_perms, 1); + WARN_ON_ONCE(ret); + } + + return ret; +} + +static struct gunyah_rm_platform_ops qcom_scm_gh_rm_platform_ops = { + .pre_mem_share = qcom_scm_gh_rm_pre_mem_share, + .post_mem_reclaim = qcom_scm_gh_rm_post_mem_reclaim, +}; + static int qcom_scm_find_dload_address(struct device *dev, u64 *addr) { struct device_node *tcsr; @@ -1414,6 +1506,9 @@ static int qcom_scm_probe(struct platform_device *pdev) if (download_mode) qcom_scm_set_download_mode(true); + if (gh_rm_register_platform_ops(&qcom_scm_gh_rm_platform_ops)) + dev_warn(__scm->dev, "Gunyah RM platform ops were already registered\n"); + return 0; }