From patchwork Mon Jan 8 12:34:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13513419 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 7B665C47258 for ; Mon, 8 Jan 2024 12:35:21 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=yxZXAJy8mYmZwKugityo79dF9RCufKC4KpkFfomX/es=; b=mcTXREZzDATeZD F+bLuXTmOY+qJWmjg4Fc2IYs+E1u36nQQN9PtbbDNglLSp+zhK43H2ITjodwEbKk2JD8QxBWZpLMI Mp1o5iNRcoJTmM4hxL2zuVYhfei5trmYWWvYl6RkMti4hN27eC2xnIqZTVqKiZ+IK/GLv4Y0Ggzun iab3mUMVKO5DZhAsCRCpjnC2cw0qdjPCyNFOVZa3TthZL2lpWkftiCH3k3i5f31hajUAuMeX2tqUm 2LE7Gk7kijJMjiGci0v1SbZrZiG1FQjf1VNuPPGbq6BPlwMqpB8kBsahsneH7i3MqRkYSExTityGu Ugcft4GUmEwFF4CLoGWg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqD-0054TV-0c; Mon, 08 Jan 2024 12:34:53 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoq9-0054Qn-0f for linux-arm-kernel@lists.infradead.org; Mon, 08 Jan 2024 12:34:50 +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 0F46CFEC; Mon, 8 Jan 2024 04:35:33 -0800 (PST) Received: from [127.0.1.1] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 725F13F64C; Mon, 8 Jan 2024 04:34:46 -0800 (PST) From: Cristian Marussi Date: Mon, 08 Jan 2024 12:34:11 +0000 Subject: [PATCH 1/6] firmware: arm_ffa: Add missing rwlock_init() MIME-Version: 1.0 Message-Id: <20240108-ffa_fixes_6-8-v1-1-75bf7035bc50@arm.com> References: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> In-Reply-To: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> To: Sudeep Holla Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Cristian Marussi X-Mailer: b4 0.12.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_043449_290796_D751669D X-CRM114-Status: UNSURE ( 6.87 ) X-CRM114-Notice: Please train this message. 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 Add missing rwlock initialization. Fixes: 0184450b8b1e ("firmware: arm_ffa: Add schedule receiver callback mechanism") Signed-off-by: Cristian Marussi --- drivers/firmware/arm_ffa/driver.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 6146b2927d5c..ed1d6a24934e 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -1226,6 +1226,7 @@ static void ffa_setup_partitions(void) ffa_device_unregister(ffa_dev); continue; } + rwlock_init(&info->rw_lock); xa_store(&drv_info->partition_info, tpbuf->id, info, GFP_KERNEL); } drv_info->partition_count = count; From patchwork Mon Jan 8 12:34:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13513415 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 D0FB3C3DA6E for ; Mon, 8 Jan 2024 12:35:17 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Hg5raGZCteak4Tvst1dIBOHaSt+6B3Glp8cL79TWArE=; b=EAmKgtTiwyNVxO pTGsH/Sur1BkA8Xuk+oa8V499c67ORsk86/LwSqos5p6gwgXMPnQl6QSUhG6kgtwgi6CUo39TU+BN MgQX7/Wxp34KEMvbhmSU1SBxHtpbuHARnDPAwkSQbg0/tI7qpD4LViJYXoQuacf9COI0bXo/lz/Ub HftRXIM5bf/ITKaHtkkgi0cCTZM5BoCQxmy0zU0HF8eUkJdzmiqKgSIKGkP9H4hcJ7GL5ZhrhX2TN GgKKgdR9w7xN0l+KNuWGRcFUPpXB7ZrT2v7116lIu+iL1Z/JR17f1YxOBuweHlOr+4AXjDliBs5Ln ZlJZArHVqZs8ifn1sKkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqD-0054Tp-2J; Mon, 08 Jan 2024 12:34:53 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoq9-0054Qx-1K for linux-arm-kernel@lists.infradead.org; Mon, 08 Jan 2024 12:34:50 +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 DD8D21477; Mon, 8 Jan 2024 04:35:33 -0800 (PST) Received: from [127.0.1.1] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4E5773F64C; Mon, 8 Jan 2024 04:34:47 -0800 (PST) From: Cristian Marussi Date: Mon, 08 Jan 2024 12:34:12 +0000 Subject: [PATCH 2/6] firmware: arm_ffa: Add missing host rwlock_init() MIME-Version: 1.0 Message-Id: <20240108-ffa_fixes_6-8-v1-2-75bf7035bc50@arm.com> References: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> In-Reply-To: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> To: Sudeep Holla Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Cristian Marussi X-Mailer: b4 0.12.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_043449_491474_CB97230B X-CRM114-Status: UNSURE ( 7.37 ) X-CRM114-Notice: Please train this message. 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 Add missing rwlock initialization for host partition setup. Fixes: 1b6bf41b7a65 ("firmware: arm_ffa: Add notification handling mechanism") Signed-off-by: Cristian Marussi --- drivers/firmware/arm_ffa/driver.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index ed1d6a24934e..8df92c9521f4 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -1237,6 +1237,7 @@ static void ffa_setup_partitions(void) info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) return; + rwlock_init(&info->rw_lock); xa_store(&drv_info->partition_info, drv_info->vm_id, info, GFP_KERNEL); drv_info->partition_count++; } From patchwork Mon Jan 8 12:34:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13513418 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 DA8FBC3DA6E for ; Mon, 8 Jan 2024 12:35:20 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=7KBIfaD7kDDH9NadWDgX5QvUKYRDSnIXPtpGNRdIPCs=; b=c3vdrKCaUNvbRt yopKplTVQJc7BWduHGadVbuc+6w+nEzo8RSpb+SGWOp9W9yNIrUHAT1C0JzhWlZ1v5WidOkOFur4X dMwx8ZAy/+sjpXYwvrVY010XdM3nFtetZxkIcaLbDxKSaPM9jTdD6ZUkD0omoAfuOk+e8w4jt6293 slxZFCUlUJvKFuaNQSOMo+lKyhfR6KKwS1vL1A+UEKRtV9/LHkGM+amMG79TS4bBzB4d16t6T+fJL gXA+Hf5Cnf2A6aRTTNYeMOK7xfteMfAOvGncl3DKlaH8ckskQcLhPNG0Wakr8go6LPE9LsrpH/xwy SI33XVFnAS3GiZuGHEig==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqG-0054Vh-0x; Mon, 08 Jan 2024 12:34:56 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqB-0054SK-1e for linux-arm-kernel@lists.infradead.org; Mon, 08 Jan 2024 12:34:52 +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 C60051480; Mon, 8 Jan 2024 04:35:34 -0800 (PST) Received: from [127.0.1.1] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 28D113F64C; Mon, 8 Jan 2024 04:34:48 -0800 (PST) From: Cristian Marussi Date: Mon, 08 Jan 2024 12:34:13 +0000 Subject: [PATCH 3/6] firmware: arm_ffa: Check xa_load() return value MIME-Version: 1.0 Message-Id: <20240108-ffa_fixes_6-8-v1-3-75bf7035bc50@arm.com> References: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> In-Reply-To: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> To: Sudeep Holla Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Cristian Marussi X-Mailer: b4 0.12.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_043451_606426_4F326560 X-CRM114-Status: UNSURE ( 8.46 ) X-CRM114-Notice: Please train this message. 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 Add a check to verify the result of xa_load() during partition lookups. Fixes: 0184450b8b1e ("firmware: arm_ffa: Add schedule receiver callback mechanism") Signed-off-by: Cristian Marussi --- drivers/firmware/arm_ffa/driver.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 8df92c9521f4..0ea1dd6e55c4 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -733,6 +733,11 @@ static void __do_sched_recv_cb(u16 part_id, u16 vcpu, bool is_per_vcpu) void *cb_data; partition = xa_load(&drv_info->partition_info, part_id); + if (!partition) { + pr_err("%s: Invalid partition ID 0x%x\n", __func__, part_id); + return; + } + read_lock(&partition->rw_lock); callback = partition->callback; cb_data = partition->cb_data; @@ -915,6 +920,11 @@ static int ffa_sched_recv_cb_update(u16 part_id, ffa_sched_recv_cb callback, return -EOPNOTSUPP; partition = xa_load(&drv_info->partition_info, part_id); + if (!partition) { + pr_err("%s: Invalid partition ID 0x%x\n", __func__, part_id); + return -EINVAL; + } + write_lock(&partition->rw_lock); cb_valid = !!partition->callback; From patchwork Mon Jan 8 12:34:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13513417 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 0627EC4707B for ; Mon, 8 Jan 2024 12:35:19 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2tfc99jahaqk0XspY3KzVfVUS7CFKZd90J0SX/LRWSA=; b=ECFk7jpm687vai 0opY+EuE25N1pR5IzuaelFp48KNSFlY+h8UJwpHsuf4k0Jbr/hWPuaI1qhnTrBacWeDOqdLbuAcDk uIkphmbBbLXnAVgugK/bth/GzjQ2sboTy3pSK6O6X6wzMlJ+XBsJ3zcKljGsmiAh/pmUDF3pZatBJ yLjWZ91vwwLIRckLhRX7qpCCNObFub5kyLrTJuY1j+0geIW/0U1lcXsSCNq1omaJ3x/yUGhFZV3e5 QFjdMYCZ2wBeGyWwkdh3hyg3oE4QVTXDeXsrHmUEkhbhGLglq90P+yUBk00Phwj22+Aev7cL9vUoQ VPC1g9nLDo+BGb1itTFA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqF-0054Uo-0P; Mon, 08 Jan 2024 12:34:55 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqB-0054Rt-0F for linux-arm-kernel@lists.infradead.org; Mon, 08 Jan 2024 12:34:52 +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 A22A6150C; Mon, 8 Jan 2024 04:35:35 -0800 (PST) Received: from [127.0.1.1] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 114313F64C; Mon, 8 Jan 2024 04:34:48 -0800 (PST) From: Cristian Marussi Date: Mon, 08 Jan 2024 12:34:14 +0000 Subject: [PATCH 4/6] firmware: arm_ffa: Simplify ffa_partitions_cleanup() MIME-Version: 1.0 Message-Id: <20240108-ffa_fixes_6-8-v1-4-75bf7035bc50@arm.com> References: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> In-Reply-To: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> To: Sudeep Holla Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Cristian Marussi X-Mailer: b4 0.12.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_043451_161584_33306CAE X-CRM114-Status: GOOD ( 10.15 ) 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 On cleanup iterate the XArrays with xa_for_each() and remove the existent entries with xa_erase(), finally destroy the XArray itself. Remove partition_count field from drv_info since no more used anywhwere. Signed-off-by: Cristian Marussi --- drivers/firmware/arm_ffa/driver.c | 26 ++++++-------------------- 1 file changed, 6 insertions(+), 20 deletions(-) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 0ea1dd6e55c4..2426021dbb58 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -107,7 +107,6 @@ struct ffa_drv_info { struct work_struct notif_pcpu_work; struct work_struct irq_work; struct xarray partition_info; - unsigned int partition_count; DECLARE_HASHTABLE(notifier_hash, ilog2(FFA_MAX_NOTIFICATIONS)); struct mutex notify_lock; /* lock to protect notifier hashtable */ }; @@ -1239,7 +1238,6 @@ static void ffa_setup_partitions(void) rwlock_init(&info->rw_lock); xa_store(&drv_info->partition_info, tpbuf->id, info, GFP_KERNEL); } - drv_info->partition_count = count; kfree(pbuf); @@ -1249,29 +1247,18 @@ static void ffa_setup_partitions(void) return; rwlock_init(&info->rw_lock); xa_store(&drv_info->partition_info, drv_info->vm_id, info, GFP_KERNEL); - drv_info->partition_count++; } static void ffa_partitions_cleanup(void) { - struct ffa_dev_part_info **info; - int idx, count = drv_info->partition_count; - - if (!count) - return; - - info = kcalloc(count, sizeof(*info), GFP_KERNEL); - if (!info) - return; - - xa_extract(&drv_info->partition_info, (void **)info, 0, VM_ID_MASK, - count, XA_PRESENT); + struct ffa_dev_part_info *info; + unsigned long idx; - for (idx = 0; idx < count; idx++) - kfree(info[idx]); - kfree(info); + xa_for_each(&drv_info->partition_info, idx, info) { + xa_erase(&drv_info->partition_info, idx); + kfree(info); + } - drv_info->partition_count = 0; xa_destroy(&drv_info->partition_info); } @@ -1547,7 +1534,6 @@ static void __exit ffa_exit(void) ffa_rxtx_unmap(drv_info->vm_id); free_pages_exact(drv_info->tx_buffer, RXTX_BUFFER_SIZE); free_pages_exact(drv_info->rx_buffer, RXTX_BUFFER_SIZE); - xa_destroy(&drv_info->partition_info); kfree(drv_info); arm_ffa_bus_exit(); } From patchwork Mon Jan 8 12:34:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13513420 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 D986DC3DA6E for ; Mon, 8 Jan 2024 12:35:26 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fgAZhvMGsKMJXqAwmlFQS4lai0n7SSsaXVBhspa8r7o=; b=IOLxtT0mV7duIr vfgQx6/MJflVQ3K5a2c1MUNLr2ETiLfE3e4cPdDADwHjJgmzG466j3DyENMS/UPfcEP+habbIIXq9 fOeTqSCK9kkFDuu0UlupgQ3qtRcHlSvGEyMMnbSRBlYZPAe1wFiJm+Aj1QYEXBFksQaUS6DVqgo+l cBu219Wq7yC7eSdgJ/xkk5IfsJA30rp4Rf5FZWOMyRVoAjM/lhc1MRttKs1HZ2UJAnPGubgdj45ZE KNTXmEraeNoo+OhEJoZYfJhg/5zdQNCJsNIP8X5KEYfmL5oNau40RX0CnEX8mPEO1R3sQzdk8y3Bo M5ue+PDpBnF83KAIfH2Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqF-0054VD-2L; Mon, 08 Jan 2024 12:34:55 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqB-0054S8-0z for linux-arm-kernel@lists.infradead.org; Mon, 08 Jan 2024 12:34:52 +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 95B3AC15; Mon, 8 Jan 2024 04:35:36 -0800 (PST) Received: from [127.0.1.1] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E13CE3F64C; Mon, 8 Jan 2024 04:34:49 -0800 (PST) From: Cristian Marussi Date: Mon, 08 Jan 2024 12:34:15 +0000 Subject: [PATCH 5/6] firmware: arm_ffa: Use xa_insert() and check for result MIME-Version: 1.0 Message-Id: <20240108-ffa_fixes_6-8-v1-5-75bf7035bc50@arm.com> References: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> In-Reply-To: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> To: Sudeep Holla Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Cristian Marussi X-Mailer: b4 0.12.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_043451_393332_8661D1BF X-CRM114-Status: GOOD ( 11.55 ) 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 While adding new partitions descriptors to the XArray the outcome of the stores should be checked and, in particular, it has also to be ensured that an existing entry with the same index was not already present, since partitions IDs are expected to be unique. Use xa_insert() instead of xa_store() since it returns -EBUSY when the index is already in use and log an error when that happens. Signed-off-by: Cristian Marussi --- drivers/firmware/arm_ffa/driver.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 2426021dbb58..c613b57747cf 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -1197,7 +1197,7 @@ void ffa_device_match_uuid(struct ffa_device *ffa_dev, const uuid_t *uuid) static void ffa_setup_partitions(void) { - int count, idx; + int count, idx, ret; uuid_t uuid; struct ffa_device *ffa_dev; struct ffa_dev_part_info *info; @@ -1236,7 +1236,14 @@ static void ffa_setup_partitions(void) continue; } rwlock_init(&info->rw_lock); - xa_store(&drv_info->partition_info, tpbuf->id, info, GFP_KERNEL); + ret = xa_insert(&drv_info->partition_info, tpbuf->id, + info, GFP_KERNEL); + if (ret) { + pr_err("%s: failed to save partition ID 0x%x - ret:%d\n", + __func__, tpbuf->id, ret); + ffa_device_unregister(ffa_dev); + kfree(info); + } } kfree(pbuf); @@ -1246,7 +1253,13 @@ static void ffa_setup_partitions(void) if (!info) return; rwlock_init(&info->rw_lock); - xa_store(&drv_info->partition_info, drv_info->vm_id, info, GFP_KERNEL); + ret = xa_insert(&drv_info->partition_info, drv_info->vm_id, + info, GFP_KERNEL); + if (ret) { + pr_err("%s: failed to save Host partition ID 0x%x - ret:%d. Abort.\n", + __func__, drv_info->vm_id, ret); + kfree(info); + } } static void ffa_partitions_cleanup(void) From patchwork Mon Jan 8 12:34:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13513421 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 5DA75C3DA6E for ; Mon, 8 Jan 2024 12:35:30 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GBihDk6b9M9VGngZkTty4CO7VGHqZ5zoKwGb9Y8Ile0=; b=VqgiqDltMpqWkl vYlZk4sTuPJklH3d3fRgcKyAl/Wk5B/p9qz0llXR0zhQasveb+609GiuBHR3s/JYzsR4uX0rmz2zK CTVkN4QYRIADTTlvmp3SMxcP30Rh22nEDfIEpi7ho5mh6vccjfZqCKxH/ZEgyPPLebm9WSK2AEjDo vvqi2sAA4nivyBzCmMlmRzCfp8rQrLeyVpkf6pgj2WBMhBYVtZnV6UCfDn+tlTZ2SdfeG2AA1jVe2 Lh54pjCF6N3UFwrTsjO8fghplL+c34Bkc3Xkkm48KwIZRrm3z+V7Pc4vmA6hrpIS1Fub+DAmZARTw ngZ/MCUsmxvmVwjFNkXg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqH-0054WU-1d; Mon, 08 Jan 2024 12:34:57 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rMoqB-0054So-33 for linux-arm-kernel@lists.infradead.org; Mon, 08 Jan 2024 12:34:53 +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 703E6FEC; Mon, 8 Jan 2024 04:35:37 -0800 (PST) Received: from [127.0.1.1] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D55CD3F64C; Mon, 8 Jan 2024 04:34:50 -0800 (PST) From: Cristian Marussi Date: Mon, 08 Jan 2024 12:34:16 +0000 Subject: [PATCH 6/6] firmware: arm_ffa: Handle partitions setup failures MIME-Version: 1.0 Message-Id: <20240108-ffa_fixes_6-8-v1-6-75bf7035bc50@arm.com> References: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> In-Reply-To: <20240108-ffa_fixes_6-8-v1-0-75bf7035bc50@arm.com> To: Sudeep Holla Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Cristian Marussi X-Mailer: b4 0.12.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_043452_027894_8940B2D8 X-CRM114-Status: GOOD ( 14.17 ) 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 Make ffa_setup_partitions() fail, cleanup and return an error when the Host partition setup fails: in such a case ffa_init() itself will fail. Signed-off-by: Cristian Marussi --- drivers/firmware/arm_ffa/driver.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index c613b57747cf..f2556a8e9401 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -112,6 +112,7 @@ struct ffa_drv_info { }; static struct ffa_drv_info *drv_info; +static void ffa_partitions_cleanup(void); /* * The driver must be able to support all the versions from the earliest @@ -1195,7 +1196,7 @@ void ffa_device_match_uuid(struct ffa_device *ffa_dev, const uuid_t *uuid) kfree(pbuf); } -static void ffa_setup_partitions(void) +static int ffa_setup_partitions(void) { int count, idx, ret; uuid_t uuid; @@ -1206,7 +1207,7 @@ static void ffa_setup_partitions(void) count = ffa_partition_probe(&uuid_null, &pbuf); if (count <= 0) { pr_info("%s: No partitions found, error %d\n", __func__, count); - return; + return -EINVAL; } xa_init(&drv_info->partition_info); @@ -1250,8 +1251,14 @@ static void ffa_setup_partitions(void) /* Allocate for the host */ info = kzalloc(sizeof(*info), GFP_KERNEL); - if (!info) - return; + if (!info) { + pr_err("%s: failed to alloc Host partition ID 0x%x. Abort.\n", + __func__, drv_info->vm_id); + /* Already registered devices are freed on bus_exit */ + ffa_partitions_cleanup(); + return -ENOMEM; + } + rwlock_init(&info->rw_lock); ret = xa_insert(&drv_info->partition_info, drv_info->vm_id, info, GFP_KERNEL); @@ -1259,7 +1266,11 @@ static void ffa_setup_partitions(void) pr_err("%s: failed to save Host partition ID 0x%x - ret:%d. Abort.\n", __func__, drv_info->vm_id, ret); kfree(info); + /* Already registered devices are freed on bus_exit */ + ffa_partitions_cleanup(); } + + return ret; } static void ffa_partitions_cleanup(void) @@ -1520,7 +1531,11 @@ static int __init ffa_init(void) ffa_notifications_setup(); - ffa_setup_partitions(); + ret = ffa_setup_partitions(); + if (ret) { + pr_err("failed to setup partitions\n"); + goto cleanup_notifs; + } ret = ffa_sched_recv_cb_update(drv_info->vm_id, ffa_self_notif_handle, drv_info, true); @@ -1528,6 +1543,9 @@ static int __init ffa_init(void) pr_info("Failed to register driver sched callback %d\n", ret); return 0; + +cleanup_notifs: + ffa_notifications_cleanup(); free_pages: if (drv_info->tx_buffer) free_pages_exact(drv_info->tx_buffer, RXTX_BUFFER_SIZE);