From patchwork Thu Feb 22 23:16:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 13568340 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 4D9F1C47DD9 for ; Thu, 22 Feb 2024 23:29:52 +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=a7igS5F0OOrsrPuKMsPsk3lJqdR0wAAXCl3oqOJqhIc=; b=lxQl/Xp6Ik91lA nkC43lRJGvb/SGtaEX0mr6m+CR6q3z4bOVRuel2DPWXKacU9zoziU7lo7zNtxUecjV6lbwnL9zDW2 LsPO/76JrPATWd8mbysHkqXKK5S5582zWDhnBykE/G7iPxGykDSSex0MNAEMBuOKvwWoBJyiIgQ1j 1cmwY112sApbetegX58ogxXOWNytIge+xLEpwZHeT1M0KGpnKWYWFx9Vjz6FM7F/5J12zqc85HGw+ PZoOcTb3Hc2ccDrydKJwDUP/QG2zH9hLJT/gM9lS3t4jQd5Rs1xVNjwsA8Iv0HxvLZxi/pjUgyoCR 4IB/KgdzX9BeqrjRvn8A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rdIVD-000000070gw-44Dw; Thu, 22 Feb 2024 23:29:20 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rdIJJ-00000006vtU-27L8 for linux-arm-kernel@bombadil.infradead.org; Thu, 22 Feb 2024 23:17:17 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=CC:To:In-Reply-To:References:Message-ID :Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date:From:Sender :Reply-To:Content-ID:Content-Description; bh=BqFFNu68PPJsdW9psryeqdBWeZaEA8iJMtTYpGjEiRs=; b=BJwIeC118goDDfUl/A8QS1cjPi EyG8FZeiaStNqx9fad4ZS6ZLfQ8+aZwd6m5YdRfbT6caNrh88twqGVeAEC2uM8G5kOKmp8jR3sDty bDseiPMSJG96TUAM3Q3w7ADcBCXYfvi9+4cIXyFwxjGvhVoETpQ9ITSiSsZo0Oew7wMD8xrqun8M/ BF4TQ75dZy/chfMDP/vnw9wXM7yEXj3vt73lt/bndGJe9e4C4y103+8gL1QDzKNo4Fdpun6WnWlGB wuDX9oqhEnite2VPile0VHLUZAampomWtliRySnyHXBGmZU5OPy57oL6Ith4w0ZimShKDX/IMKT4i KfE7LKUw==; Received: from mx0b-0031df01.pphosted.com ([205.220.180.131]) by casper.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rdIJE-00000004za3-3RCA for linux-arm-kernel@lists.infradead.org; Thu, 22 Feb 2024 23:17:00 +0000 Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 41MLSSYf024471; Thu, 22 Feb 2024 23:16:39 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:date:subject:mime-version:content-type :content-transfer-encoding:message-id:references:in-reply-to:to :cc; s=qcppdkim1; bh=BqFFNu68PPJsdW9psryeqdBWeZaEA8iJMtTYpGjEiRs =; b=Aex6mvf2g3FnivTElXrRrrHWoO98H3rwWvOrmltuggNv3WUhHob6R/Efvf5 fth/r/0ebRdtGJN6hnNt00WxB+8pxKlu8y2Zjah3urXwGeZ2A8JIEuZNAzC80uvQ WlIeepmVse9WxaI/b//9J8xcsfewNrgxojbn1H3/NNwIMlcpN4bkj5HIqNF8ZUH7 RIuoI+MZZ6xj4SnJhmTgjSUiB7Us6pTFEBBECy0F6SLzOou0dnNdl49ruiqElAT2 F+J3iD96h5jsthaHd4CmCy/27vk8MDfgaFFPUXHpqcgipDVinxSZyXQCY0WIlNaK tnoNdc9MIJfm8YDvhpRbBPlK5Ig== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3we3231h1r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 22 Feb 2024 23:16:39 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 41MNGc3b025583 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 22 Feb 2024 23:16:38 GMT 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 15.2.1118.40; Thu, 22 Feb 2024 15:16:37 -0800 From: Elliot Berman Date: Thu, 22 Feb 2024 15:16:42 -0800 Subject: [PATCH v17 19/35] arch/mm: Export direct {un,}map functions MIME-Version: 1.0 Message-ID: <20240222-gunyah-v17-19-1e9da6763d38@quicinc.com> References: <20240222-gunyah-v17-0-1e9da6763d38@quicinc.com> In-Reply-To: <20240222-gunyah-v17-0-1e9da6763d38@quicinc.com> To: Alex Elder , Srinivas Kandagatla , Murali Nalajal , Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Philip Derrin , Prakruthi Deepak Heragu , Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Will Deacon , Konrad Dybcio , Bjorn Andersson , Dmitry Baryshkov , "Fuad Tabba" , Sean Christopherson , "Andrew Morton" CC: , , , , , , Elliot Berman X-Mailer: b4 0.12.4 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) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: MP-x340LqCsOeMxuGX6zrotY1v88l2Gs X-Proofpoint-GUID: MP-x340LqCsOeMxuGX6zrotY1v88l2Gs X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-22_15,2024-02-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 mlxscore=0 lowpriorityscore=0 clxscore=1015 suspectscore=0 malwarescore=0 mlxlogscore=828 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2402220178 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240222_231657_082654_45DCEB1E X-CRM114-Status: GOOD ( 11.75 ) 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 Firmware and hypervisor drivers can donate system heap memory to their respective firmware/hypervisor entities. Those drivers should unmap the pages from the kernel's logical map before doing so. Export can_set_direct_map, set_direct_map_invalid_noflush, and set_direct_map_default_noflush. Signed-off-by: Elliot Berman --- arch/arm64/mm/pageattr.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index 924843f1f661b..a9bd84588c98a 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -32,6 +32,7 @@ bool can_set_direct_map(void) return rodata_full || debug_pagealloc_enabled() || arm64_kfence_can_set_direct_map(); } +EXPORT_SYMBOL_GPL(can_set_direct_map); static int change_page_range(pte_t *ptep, unsigned long addr, void *data) { @@ -176,6 +177,7 @@ int set_direct_map_invalid_noflush(struct page *page) (unsigned long)page_address(page), PAGE_SIZE, change_page_range, &data); } +EXPORT_SYMBOL_GPL(set_direct_map_invalid_noflush); int set_direct_map_default_noflush(struct page *page) { @@ -191,6 +193,7 @@ int set_direct_map_default_noflush(struct page *page) (unsigned long)page_address(page), PAGE_SIZE, change_page_range, &data); } +EXPORT_SYMBOL_GPL(set_direct_map_default_noflush); #ifdef CONFIG_DEBUG_PAGEALLOC void __kernel_map_pages(struct page *page, int numpages, int enable)