From patchwork Tue Oct 24 15:52:26 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: 10025035 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 A61146035E for ; Tue, 24 Oct 2017 15:53:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 98CCB28A23 for ; Tue, 24 Oct 2017 15:53:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8D93928A29; Tue, 24 Oct 2017 15:53:23 +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=ham 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 BE6EA28A23 for ; Tue, 24 Oct 2017 15:53:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751661AbdJXPxV (ORCPT ); Tue, 24 Oct 2017 11:53:21 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:56472 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751430AbdJXPwt (ORCPT ); Tue, 24 Oct 2017 11:52:49 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id D475C607B5; Tue, 24 Oct 2017 15:52:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1508860368; bh=5AL+r/rloF9uw22dR1mia31iIkNfw0cEo+33UN82qxM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YUjNqZTHZ0oTvOKyOxGzjUfvqWC1W4qxOUkN3s5B5JjNIErLODWaqNc/3ffJ3Hgb9 63TcOVYy92+jtNgaGJ7wWeL/u/Apb9H9QqNraMyACIM+ijfNw5sz/L0mD3oy16wJcw gVnrqJliDMFaWhJO5xYoXLDrZa0l7sMWjIprVwuA= 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 6E8A7606F8; Tue, 24 Oct 2017 15:52:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1508860367; bh=5AL+r/rloF9uw22dR1mia31iIkNfw0cEo+33UN82qxM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L8pr4bd0dMlractQWMgXcZ4vaGpV0n4qC1gPeMbv4x9HIGytkvaTXvHXX6g2a9S36 ZTw4TrTI6Lx9mS1WsWeKcr+YosGmKA0W8lWzyQNUiyMSGx31IgmAwG4PPcV7vEKk70 VShZL8AC3zDpgDXOHcT9mOCWvlAt3omkpz7NNKLs= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6E8A7606F8 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 3/4] remoteproc: qcom: Make secure world call for mem ownership switch Date: Tue, 24 Oct 2017 21:22:26 +0530 Message-Id: <1508860347-25181-4-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 MSS proc on msm8996 can not access fw loaded region without stage second translation of memory pages where mpss image are loaded. This patch in order to enable mss boot on msm8996 invoke scm call to switch or share ownership between apps and modem. Signed-off-by: Avaneesh Kumar Dwivedi --- drivers/remoteproc/qcom_q6v5_pil.c | 91 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 88 insertions(+), 3 deletions(-) diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c index 39b9ee4..cbf3257 100644 --- a/drivers/remoteproc/qcom_q6v5_pil.c +++ b/drivers/remoteproc/qcom_q6v5_pil.c @@ -110,6 +110,7 @@ struct rproc_hexagon_res { struct qcom_mss_reg_res *active_supply; char **proxy_clk_names; char **active_clk_names; + bool need_mem_protection; }; struct q6v5 { @@ -154,6 +155,10 @@ struct q6v5 { struct qcom_rproc_subdev smd_subdev; struct qcom_rproc_ssr ssr_subdev; + bool need_mem_protection; + int mpss_perm; + int mba_perm; + }; static int q6v5_regulator_init(struct device *dev, struct reg_info *regs, @@ -289,6 +294,35 @@ static struct resource_table *q6v5_find_rsc_table(struct rproc *rproc, return &table; } +static int q6v5_xfer_mem_ownership(struct q6v5 *qproc, int *current_perm, + bool remote_owner, phys_addr_t addr, + size_t size) +{ + struct qcom_scm_vmperm next; + int ret; + + if (!qproc->need_mem_protection) + return 0; + if (remote_owner && *current_perm == BIT(QCOM_SCM_VMID_MSS_MSA)) + return 0; + if (!remote_owner && *current_perm == BIT(QCOM_SCM_VMID_HLOS)) + return 0; + + next.vmid = remote_owner ? QCOM_SCM_VMID_MSS_MSA : QCOM_SCM_VMID_HLOS; + next.perm = remote_owner ? QCOM_SCM_PERM_RW : QCOM_SCM_PERM_RWX; + + ret = qcom_scm_assign_mem(addr, ALIGN(size, SZ_4K), + current_perm, &next, 1); + if (ret < 0) { + pr_err("Failed to assign memory access in range %p to %p to %s ret = %d\n", + (void *)addr, (void *)(addr + size), + remote_owner ? "mss" : "hlos", ret); + return ret; + } + + return 0; +} + static int q6v5_load(struct rproc *rproc, const struct firmware *fw) { struct q6v5 *qproc = rproc->priv; @@ -451,6 +485,8 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw) { unsigned long dma_attrs = DMA_ATTR_FORCE_CONTIGUOUS; dma_addr_t phys; + int mdata_perm; + int xferop_ret; void *ptr; int ret; @@ -462,6 +498,13 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw) memcpy(ptr, fw->data, fw->size); + /* Hypervisor mapping to access metadata by modem */ + mdata_perm = BIT(QCOM_SCM_VMID_HLOS); + ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm, + true, phys, fw->size); + if (ret) + return -EAGAIN; + writel(phys, qproc->rmb_base + RMB_PMI_META_DATA_REG); writel(RMB_CMD_META_DATA_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG); @@ -471,6 +514,12 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw) else if (ret < 0) dev_err(qproc->dev, "MPSS header authentication failed: %d\n", ret); + /* Metadata authentication done, remove modem access */ + xferop_ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm, + false, phys, fw->size); + if (xferop_ret) + dev_warn(qproc->dev, + "mdt buffer not reclaimed system may become unstable\n"); dma_free_attrs(qproc->dev, fw->size, ptr, phys, dma_attrs); return ret < 0 ? ret : 0; @@ -580,6 +629,10 @@ static int q6v5_mpss_load(struct q6v5 *qproc) /* Transfer ownership of modem ddr region with q6*/ boot_addr = relocate ? qproc->mpss_phys : min_addr; + ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, true, + qproc->mpss_phys, qproc->mpss_size); + if (ret) + return -EAGAIN; writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG); writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG); writel(size, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG); @@ -599,6 +652,7 @@ static int q6v5_mpss_load(struct q6v5 *qproc) static int q6v5_start(struct rproc *rproc) { struct q6v5 *qproc = (struct q6v5 *)rproc->priv; + int xfermemop_ret; int ret; ret = q6v5_regulator_enable(qproc, qproc->proxy_regs, @@ -634,6 +688,12 @@ static int q6v5_start(struct rproc *rproc) goto assert_reset; } + /* Assign MBA image access in DDR to q6 */ + xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true, + qproc->mba_phys, + qproc->mba_size); + if (xfermemop_ret) + goto assert_reset; writel(qproc->mba_phys, qproc->rmb_base + RMB_MBA_IMAGE_REG); ret = q6v5proc_reset(qproc); @@ -655,16 +715,22 @@ static int q6v5_start(struct rproc *rproc) ret = q6v5_mpss_load(qproc); if (ret) - goto halt_axi_ports; + goto reclaim_mem; ret = wait_for_completion_timeout(&qproc->start_done, msecs_to_jiffies(5000)); if (ret == 0) { dev_err(qproc->dev, "start timed out\n"); ret = -ETIMEDOUT; - goto halt_axi_ports; + goto reclaim_mem; } + xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false, + qproc->mba_phys, + qproc->mba_size); + if (xfermemop_ret) + dev_err(qproc->dev, + "Failed to reclaim mba buffer system may become unstable\n"); qproc->running = true; q6v5_clk_disable(qproc->dev, qproc->proxy_clks, @@ -674,12 +740,23 @@ static int q6v5_start(struct rproc *rproc) return 0; +reclaim_mem: + xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, + false, qproc->mpss_phys, + qproc->mpss_size); + WARN_ON(xfermemop_ret); halt_axi_ports: q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6); q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem); q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc); q6v5_clk_disable(qproc->dev, qproc->active_clks, qproc->active_clk_count); + xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false, + qproc->mba_phys, + qproc->mba_size); + if (xfermemop_ret) + dev_err(qproc->dev, "Failed to reclaim mba buffer, system may become unstable\n"); + assert_reset: reset_control_assert(qproc->mss_restart); disable_vdd: @@ -699,6 +776,7 @@ static int q6v5_stop(struct rproc *rproc) { struct q6v5 *qproc = (struct q6v5 *)rproc->priv; int ret; + u32 val; qproc->running = false; @@ -716,6 +794,9 @@ static int q6v5_stop(struct rproc *rproc) q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem); q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc); + ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, false, + qproc->mpss_phys, qproc->mpss_size); + WARN_ON(ret); reset_control_assert(qproc->mss_restart); q6v5_clk_disable(qproc->dev, qproc->active_clks, qproc->active_clk_count); @@ -1014,6 +1095,7 @@ static int q6v5_probe(struct platform_device *pdev) if (ret) goto free_rproc; + qproc->need_mem_protection = desc->need_mem_protection; ret = q6v5_request_irq(qproc, pdev, "wdog", q6v5_wdog_interrupt); if (ret < 0) goto free_rproc; @@ -1035,7 +1117,8 @@ static int q6v5_probe(struct platform_device *pdev) ret = PTR_ERR(qproc->state); goto free_rproc; } - + qproc->mpss_perm = BIT(QCOM_SCM_VMID_HLOS); + qproc->mba_perm = BIT(QCOM_SCM_VMID_HLOS); qcom_add_smd_subdev(rproc, &qproc->smd_subdev); qcom_add_ssr_subdev(rproc, &qproc->ssr_subdev, "mpss"); @@ -1091,6 +1174,7 @@ static int q6v5_remove(struct platform_device *pdev) "mem", NULL }, + .need_mem_protection = false, }; static const struct rproc_hexagon_res msm8974_mss = { @@ -1128,6 +1212,7 @@ static int q6v5_remove(struct platform_device *pdev) "mem", NULL }, + .need_mem_protection = false, }; static const struct of_device_id q6v5_of_match[] = {