From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 16 Aug 2022 10:48:26 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oNsFO-000Up0-T8 for lore@lore.pengutronix.de; Tue, 16 Aug 2022 10:48:26 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oNsFM-0004mN-TS for lore@pengutronix.de; Tue, 16 Aug 2022 10:48:25 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:From:In-Reply-To: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=saY31UxhbNkJYmkf31QvneAWQlr8QEa0IQvZ0u8HhrA=; b=0TAsmjjDcwe/hRjGTmDfVwxiol Q1JAKuPXc4kPzViCZluJmAeFYa37EQjxyqCs7PEU7EAZZXzpJnjbYrpPZUMGyBR2PWGHc98o08vLO 4TtrqShj2lV6Ia4jK6CAwkT7U8qPXGGftI/QlMOxB1HqNkjW8M6ZF6iAhgp4wix82/TJVruqHOY8y lwPuMevdsWsKnx2yWn9QHsF2SjaIflaDmRk4rcZTeMMwfgxuPQO7ZZ+hbaO9eq67bTbXoXa62A/Bp cEeGTb6p4KbotL+F1okG7YcKB5xsIRGWN7erlyHOrRqWvG7kzf6yob+RK0H27gVxEMvynAovwmwMl cDTSzDpA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oNsDw-00GxtM-82; Tue, 16 Aug 2022 08:46:56 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oNsDk-00Gxmf-6a for barebox@lists.infradead.org; Tue, 16 Aug 2022 08:46:52 +0000 Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oNsDi-0004bf-FI; Tue, 16 Aug 2022 10:46:42 +0200 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1oNsDi-0007RO-5w; Tue, 16 Aug 2022 10:46:42 +0200 Date: Tue, 16 Aug 2022 10:46:42 +0200 To: Ahmad Fatoum Cc: barebox@lists.infradead.org, rcz@pengutronix.de Message-ID: <20220816084642.GL17485@pengutronix.de> References: <20220815153209.2422662-1-a.fatoum@pengutronix.de> <20220815153209.2422662-4-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220815153209.2422662-4-a.fatoum@pengutronix.de> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-Accept-Language: de,en X-Accept-Content-Type: text/plain User-Agent: Mutt/1.10.1 (2018-07-13) From: Sascha Hauer X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220816_014650_813596_C98EF148 X-CRM114-Status: GOOD ( 24.88 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.8 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH 03/10] memory: define reserve_sdram_region helper X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) On Mon, Aug 15, 2022 at 05:32:02PM +0200, Ahmad Fatoum wrote: > We use request_sdram_regions both for code that barebox wants to use for > itself (e.g. barebox stack or initrd) and to reserve regions for secure > firmware that barebox shouldn't overwrite. We need to differentiate > between them, so we can apply difference caching flags depending on s/difference/different/ Sascha > region, so add a new reserve_sdram_region helper that may be used and > also add an for_each_reserved_region iterator for use in the MMU code > that applied the different caching flags later on. > > Signed-off-by: Ahmad Fatoum > --- > include/memory.h | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/include/memory.h b/include/memory.h > index 31da5d74d568..ffd66db02ba0 100644 > --- a/include/memory.h > +++ b/include/memory.h > @@ -4,6 +4,7 @@ > > #include > #include > +#include > > void mem_malloc_init(void *start, void *end); > ulong mem_malloc_start(void); > @@ -22,6 +23,9 @@ int barebox_add_memory_bank(const char *name, resource_size_t start, > resource_size_t size); > > #define for_each_memory_bank(mem) list_for_each_entry(mem, &memory_banks, list) > +#define for_each_reserved_region(mem, rsv) \ > + list_for_each_entry(rsv, &(mem)->res->children, sibling) \ > + if (((rsv)->flags & IORESOURCE_BUSY)) > > struct resource *__request_sdram_region(const char *name, unsigned flags, > resource_size_t start, resource_size_t size); > @@ -34,6 +38,14 @@ static inline struct resource *request_sdram_region(const char *name, > return __request_sdram_region(name, 0, start, size); > } > > +/* use for secure firmware to inhibit speculation */ > +static inline struct resource *reserve_sdram_region(const char *name, > + resource_size_t start, > + resource_size_t size) > +{ > + return __request_sdram_region(name, IORESOURCE_BUSY, start, size); > +} > + > int release_sdram_region(struct resource *res); > > void memory_bank_find_space(struct memory_bank *bank, resource_size_t *retstart, > -- > 2.30.2 > > > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |