From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 26 May 2025 15:52:04 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uJYFI-000XPV-1L for lore@lore.pengutronix.de; Mon, 26 May 2025 15:52:04 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uJYFH-0000QW-T9 for lore@pengutronix.de; Mon, 26 May 2025 15:52:04 +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:Content-Transfer-Encoding: Content-Type:MIME-Version:Date:Message-Id:Subject:References:In-Reply-To:To: From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QtGQrdQVzjxLnIsp/iLq3k9xVNvBWRE4IFp8cdlWG3Y=; b=FPScO7cOrFW4MUqjnlITtVbBu3 zo73/ahahD+RGLYELDhELcsK6e8AA7Md+Pf8bZd6SPBnc04COEeWFqVT6gR8wJWMtP+x2UlOJnsPY q/vpQ5llSBaIm3fCeEtr+2GL/E/2RHJZHBZ/UMigL7R0dQ2GZryS31y+YoqtHON/WcChmUwwWpVu9 pVvczbbzkbWF27BmU6nhFH9PS6rcVdw0MbaYcnvbczz5jvF21c+/Drp+ta1HrlyUYrNSB8tnCUr1Y B6ISSBpCwBCP3h/L+N2p4wssVcc1RCcdhd5q6gDGFRpekTG7/jfX1eEIuu7J/cK5ReQWVbJCsWbKi oxIO1tWA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uJYEs-00000008wDd-2KeQ; Mon, 26 May 2025 13:51:38 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uJYEp-00000008wDJ-0tUW for barebox@lists.infradead.org; Mon, 26 May 2025 13:51:36 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uJYEn-0000CQ-Sr; Mon, 26 May 2025 15:51:33 +0200 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uJYEn-000G98-2I; Mon, 26 May 2025 15:51:33 +0200 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1uJYEn-003123-24; Mon, 26 May 2025 15:51:33 +0200 From: Sascha Hauer To: barebox@lists.infradead.org, Ahmad Fatoum In-Reply-To: <20250521174104.1570239-1-a.fatoum@pengutronix.de> References: <20250521174104.1570239-1-a.fatoum@pengutronix.de> Message-Id: <174826749363.718904.700898856798651849.b4-ty@pengutronix.de> Date: Mon, 26 May 2025 15:51:33 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250526_065135_257620_145DC7F2 X-CRM114-Status: UNSURE ( 8.91 ) X-CRM114-Notice: Please train this message. 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.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-6.7 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: (subset) [PATCH 0/4] ARM: mmu: ensure PTE is written at once X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On Wed, 21 May 2025 19:41:00 +0200, Ahmad Fatoum wrote: > Writing the PTE with a normal non-volatile access is a bad idea, because > speculation may already use a partially written entry. > > Use WRITE_ONCE to turn this into a volatile write via a new set_pte > helper. The extra helper is useful for type enforcement and for future > extension when we start to consistently apply break-before-make[1]. > > [...] Applied, thanks! [1/4] arch: sync READ_ONCE/WRITE_ONCE with Linux https://git.pengutronix.de/cgit/barebox/commit/?id=cacff83edeef (link may not be stable) [2/4] ARM64: mmu: document granule size calculation https://git.pengutronix.de/cgit/barebox/commit/?id=ebe6d3b8b732 (link may not be stable) [3/4] ARM: mmu: ensure PTE is written at once https://git.pengutronix.de/cgit/barebox/commit/?id=cc909e5d084e (link may not be stable) Best regards, -- Sascha Hauer