From patchwork Fri Jan 27 11:27:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 49242 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp782100wrn; Fri, 27 Jan 2023 03:31:01 -0800 (PST) X-Google-Smtp-Source: AK7set80Ml3JoUC2iMRkq6JERlzJH006eTmInKX4huaAlc4dJbqh4ZyX1etdSrCoCrM3Tj90EZt6 X-Received: by 2002:a17:903:18f:b0:196:cea:487a with SMTP id z15-20020a170903018f00b001960cea487amr18596327plg.53.1674819061426; Fri, 27 Jan 2023 03:31:01 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674819061; cv=none; d=google.com; s=arc-20160816; b=SAPDe53vJ21ILvwCLTNZOAZ9dQYPgsPXq3QFmyiwj9vFd4Kn1AuOJctKFeL/gbVIpQ TR7r7Wajat7JUphX2PRHZRE2ZrMcqEohFFGp9SpIyjCkuEqsTPiw+SJMLD8pr4md6f1H qwoF4tMubU1EupuJSAsF8CdVGbdVnrWH9lqpMqf3KzrpUnDbRoJg9h9G5b89v1s2W8U3 C/Xzow87eH1I68DR5bVCX/kA2cjsDH2E6DpvFFRIY3edrM4W9pnpjN8sDD8SjTQpbiAb Js70xMn6R+RJ9wAURD01BWj4rPtCVrTkvGay++m1gfRGd8G/jYfHbSvShSjf9hpBlu2T BAMg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=0F3Ck+xUdYWUA3WHxgKNA0RoM6xHQyivcE+c04dGsmA=; b=V7KNEKHmWRW2oaKN3NyStoANp3pAz+eXjNKxtz0O6jybXqhzzupvjynFerA+Nnahhv 8hzwTrZQyx2Pr3hqkBiuWRMxw7GEZhZLBcYPTGD5UWMtH09DqhWUnr/Fl3Qyo7jiwO/2 SuPonYiBsBxJuduy2zNKK3SJ86y37XKNx7LYyp1IMix066jazHxFXG07x4SQe/TWJIme VhsXcESvMiseQ14tUeT+PWTlKZt/t8yUzLbFw7s+56qVyQdDTh4eoIUXsER7Kr+RkAtI E28cNTuC1akAy1dT5voeDAgnAMqplAVvW+jXyKwTA/sz6DjO1U92lb3Bot4JkHI9YEtL LxGg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id jw18-20020a170903279200b0016f1eb1317esi4056050plb.471.2023.01.27.03.30.49; Fri, 27 Jan 2023 03:31:01 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233427AbjA0LaY (ORCPT + 99 others); Fri, 27 Jan 2023 06:30:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233416AbjA0L3r (ORCPT ); Fri, 27 Jan 2023 06:29:47 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 749FF74C3E for ; Fri, 27 Jan 2023 03:29:01 -0800 (PST) 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 D99D51650; Fri, 27 Jan 2023 03:29:11 -0800 (PST) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.35.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B39DE3F64C; Fri, 27 Jan 2023 03:28:27 -0800 (PST) From: Steven Price To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Steven Price , Catalin Marinas , Ard Biesheuvel , Marc Zyngier , Will Deacon , Suzuki K Poulose , James Morse , Oliver Upton , Zenghui Yu , linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev Subject: [RFC PATCH 07/14] arm64: Override set_fixmap_io Date: Fri, 27 Jan 2023 11:27:51 +0000 Message-Id: <20230127112758.37891-8-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127112758.37891-1-steven.price@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127112758.37891-1-steven.price@arm.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756175072356485553?= X-GMAIL-MSGID: =?utf-8?q?1756175072356485553?= From: Suzuki K Poulose Override the set_fixmap_io to set shared permission for the host in case of a CC guest. For now we mark it shared unconditionally. Future changes could filter the physical address and make the decision accordingly. Signed-off-by: Suzuki K Poulose Signed-off-by: Steven Price --- arch/arm64/include/asm/fixmap.h | 2 ++ arch/arm64/mm/mmu.c | 13 +++++++++++++ 2 files changed, 15 insertions(+) diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h index 09ba9fe3b02c..1acafc1c7fae 100644 --- a/arch/arm64/include/asm/fixmap.h +++ b/arch/arm64/include/asm/fixmap.h @@ -107,6 +107,8 @@ void __init early_fixmap_init(void); #define __late_set_fixmap __set_fixmap #define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR) +#define set_fixmap_io set_fixmap_io +void set_fixmap_io(enum fixed_addresses idx, phys_addr_t phys); void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); #include diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 14c87e8d69d8..33fda73c669b 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1279,6 +1279,19 @@ void __set_fixmap(enum fixed_addresses idx, } } +void set_fixmap_io(enum fixed_addresses idx, phys_addr_t phys) +{ + pgprot_t prot = FIXMAP_PAGE_IO; + + /* + * For now we consider all I/O as non-secure. For future + * filter the I/O base for setting appropriate permissions. + */ + prot = __pgprot(pgprot_val(prot) | PROT_NS_SHARED); + + return __set_fixmap(idx, phys, prot); +} + void *__init fixmap_remap_fdt(phys_addr_t dt_phys, int *size, pgprot_t prot) { const u64 dt_virt_base = __fix_to_virt(FIX_FDT);