From patchwork Thu Aug 3 19:02:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 13340783 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C67FDC001DB for ; Thu, 3 Aug 2023 19:03:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=7qj18mpDrMelLDpWTimxZ+28tN+5M4h3rXfWMxOOHNQ=; b=nTIo4M68KC2UVg 9bXjtX8THURMwt9JOw3HGJrSxCtPwgB8dV0Nb4hUbrMrr2b9qRlFad6F6z356SkyhzMlrPZJSxCA3 D4miliIo5rC8c4tlivBZ2Odv/0q5UvJh9KuV5CzHuD7YQ4U3cRpsYzbmgDy4+glbl6/pWe6W93Vgi sHBgPq18S7GWOkfafGC+54j1KLfbU5AaruO1D+tyV3UFs4d1WRGoYiFYBwv+nmHDk0UX90I2yYz/r iIxelMqnyQUWiOB7v9isbj8D1W9vOVAZkQejaN87hvscXaQSpBIfWIcopbFPLnMS6CItsGcGsk3eA 85iSO64uZW+at2iIj8YA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRdal-00Agz2-03; Thu, 03 Aug 2023 19:02:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRdad-00AguU-2C for linux-arm-kernel@lists.infradead.org; Thu, 03 Aug 2023 19:02:30 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 30F861480; Thu, 3 Aug 2023 12:03:10 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 15A3B3F6C4; Thu, 3 Aug 2023 12:02:25 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Sudeep Holla , Jens Wiklander , Lucian Paul-Trifu , Marc Bonnici , Coboy Chen Subject: [PATCH RFT 04/12] firmware: arm_ffa: Implement the FFA_RUN interface Date: Thu, 3 Aug 2023 20:02:08 +0100 Message-ID: <20230803-ffa_v1-1_notif-v1-4-6613ff2b1f81@arm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230803-ffa_v1-1_notif-v1-0-6613ff2b1f81@arm.com> References: <20230803-ffa_v1-1_notif-v1-0-6613ff2b1f81@arm.com> MIME-Version: 1.0 X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2472; i=sudeep.holla@arm.com; h=from:subject:message-id; bh=8UCCbjCIAGT3DvQq6khWZB7ln9w5pDlIi1zeSYgu1Gs=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBky/iNz8e7tlD4ADSye1xFoilF+9E6QAkr3Wlr+ vNDIyzwNgyJAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZMv4jQAKCRAAQbq8MX7i mAk6D/98H1br3BLgYDjviipRcx6zJ1BF4rGi7dR1v2O8kSdokik+nyBljy56Bx54mY/neK5YSEL V3OYu770AaQ5mIOjZ/jtYreLtn3FI0oZDILv0kdkicEfbRkg6vMtRpI3UwRP8N+fOMX4JwbRciy f1l7VnBCn4BWlMuQ3NAuUTwWEo8FRYs7lG/k0Yk4Pp/FLt9RzaAPYP6rL2qNWNkbR6yTA4yGjOM YCLFgOK7nl7gGIW59NSCaqGrcsN2tr9hxl3pbTzuE8l8d5s0exBV3xeinKM/624DBJbPdheU3Eq Y/i21/woZzEcTiDl7OsLsfMq4KCXXncZ8lhth/PUv+iSKd8U9qG/FQW7WlCPYE4jXLKzj8cD6ON CgmTkzjOI7P9Vsyd1DBT44s1tKYnt/DrQsU4jDlLcQ8eje7udinc84lun2SPhXgBoZVogVb0vdv I9PcwAiPZrJok2N9sRr0KSKmxlCQnMo4CwEw5nzbx1cl91rJTHPNsEvK8JnBG0wiaVx/99+gvQo XqvJKaGd0V8ZMSIM/qCBfPxzwD1MbG9iBFvmSQqvb3BjKi4aJhwg7ukMq3X7m1yrIW7vHbaqWPb R2ueissxARbclA8P2ks0gzOrPycGMJ4pHhJ1GOWXCZUghYePYfnELmTY5n08Eno+2o6fNxlMF3U DKtZi0Ox b2IMgrA== X-Developer-Key: i=sudeep.holla@arm.com; a=openpgp; fpr=7360A21742ADF5A11767C1C139CFD4755FE2D5B4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230803_120227_815094_F26F480D X-CRM114-Status: GOOD ( 14.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org FFA_RUN is used by a scheduler to allocate CPU cycles to a target endpoint execution context specified in the target information parameter. If the endpoint execution context is in the waiting/blocked state, it transitions to the running state. Expose the ability to call FFA_RUN in order to give any partition in the system cpu cycles to perform IMPDEF functionality. Signed-off-by: Sudeep Holla --- drivers/firmware/arm_ffa/driver.c | 22 ++++++++++++++++++++++ include/linux/arm_ffa.h | 5 +++++ 2 files changed, 27 insertions(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index a76e5d3a2422..41171ae7f63a 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -604,6 +604,23 @@ static int ffa_notification_bind_common(u16 dst_id, u64 bitmap, return 0; } +static int ffa_run(struct ffa_device *dev, u16 vcpu) +{ + ffa_value_t ret; + u32 target = dev->vm_id << 16 | vcpu; + + invoke_ffa_fn((ffa_value_t){ .a0 = FFA_RUN, .a1 = target, }, &ret); + + while (ret.a0 == FFA_INTERRUPT) + invoke_ffa_fn((ffa_value_t){ .a0 = FFA_RUN, .a1 = ret.a1, }, + &ret); + + if (ret.a0 == FFA_ERROR) + return ffa_to_linux_errno((int)ret.a2); + + return 0; +} + static void ffa_set_up_mem_ops_native_flag(void) { if (!ffa_features(FFA_FN_NATIVE(MEM_LEND), 0, NULL, NULL) || @@ -696,10 +713,15 @@ static const struct ffa_mem_ops ffa_drv_mem_ops = { .memory_lend = ffa_memory_lend, }; +static const struct ffa_cpu_ops ffa_drv_cpu_ops = { + .run = ffa_run, +}; + static const struct ffa_ops ffa_drv_ops = { .info_ops = &ffa_drv_info_ops, .msg_ops = &ffa_drv_msg_ops, .mem_ops = &ffa_drv_mem_ops, + .cpu_ops = &ffa_drv_cpu_ops, }; void ffa_device_match_uuid(struct ffa_device *ffa_dev, const uuid_t *uuid) diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index 2ea1717a0825..12fd134bf670 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -387,10 +387,15 @@ struct ffa_mem_ops { int (*memory_lend)(struct ffa_mem_ops_args *args); }; +struct ffa_cpu_ops { + int (*run)(struct ffa_device *dev, u16 vcpu); +}; + struct ffa_ops { const struct ffa_info_ops *info_ops; const struct ffa_msg_ops *msg_ops; const struct ffa_mem_ops *mem_ops; + const struct ffa_cpu_ops *cpu_ops; }; #endif /* _LINUX_ARM_FFA_H */