From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 17 May 2023 16:45:17 +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 1pzIP1-004PGB-1S for lore@lore.pengutronix.de; Wed, 17 May 2023 16:45:17 +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 1pzIOy-0001Bk-Lo for lore@pengutronix.de; Wed, 17 May 2023 16:45:17 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From: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=RKgflrNO3Zt3Tzw1jyLV9Rw1SCCXrXYdwOzlPruEpxY=; b=EscgfgbrnC8Vo46zjrcd8JXBC0 UDbe3PYj30F+QBTYaZ4Hodu6FyXjWLrwtaJ0VKQm6pVBOZolcDYkZMY/9S2ji0QGUwMZlPUs5DCBR f9n70fpS95dQcxEYUvoiE2ysZ5EFfrNCUTBToQDRmpUoZP5ZfZSJnBunpB4GCCfXe4YqfXBR/9l94 4kxjvaPxCilpznWTAFprcbr27QWbIgrsjtDJ8RVPxu8lQsPstYmFt2a5+LXVWvnJAOovJaYDQ1Vgs Iy4JLkpD9A1DQdI/imkj7FqAS+psHHRmVgQ5zZXQhgKWrRcn/NkH+UkWN6uCSEknoYOY23Bo4zMxQ GHFhs5Ew==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pzINw-00AAeX-2k; Wed, 17 May 2023 14:44:12 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pzINs-00AAcU-2c for barebox@lists.infradead.org; Wed, 17 May 2023 14:44:10 +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 1pzINr-0000sn-IF; Wed, 17 May 2023 16:44:07 +0200 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1pzINq-0001OQ-N6; Wed, 17 May 2023 16:44:06 +0200 Date: Wed, 17 May 2023 16:44:06 +0200 From: Sascha Hauer To: Ahmad Fatoum Cc: Barebox List Message-ID: <20230517144406.GC29365@pengutronix.de> References: <20230517090340.3954615-1-s.hauer@pengutronix.de> <20230517090340.3954615-29-s.hauer@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230517_074408_870676_B9F80320 X-CRM114-Status: GOOD ( 21.52 ) 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=-4.7 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, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH v2 28/34] ARM: mmu32: Add pte_flags_to_pmd() 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 Wed, May 17, 2023 at 03:43:51PM +0200, Ahmad Fatoum wrote: > On 17.05.23 11:03, Sascha Hauer wrote: > > Signed-off-by: Sascha Hauer > > --- > > arch/arm/cpu/mmu_32.c | 35 +++++++++++++++++++++++++++++------ > > 1 file changed, 29 insertions(+), 6 deletions(-) > > > > diff --git a/arch/arm/cpu/mmu_32.c b/arch/arm/cpu/mmu_32.c > > index 4abaab7d87..0af89ac39c 100644 > > --- a/arch/arm/cpu/mmu_32.c > > +++ b/arch/arm/cpu/mmu_32.c > > @@ -187,30 +187,53 @@ static u32 pmd_flags_to_pte(u32 pmd) > > return pte; > > } > > > > +static u32 pte_flags_to_pmd(u32 pte) > > +{ > > + u32 pmd = 0; > > + > > + if (pte & PTE_BUFFERABLE) > > + pmd |= PMD_SECT_BUFFERABLE; > > + if (pte & PTE_CACHEABLE) > > + pmd |= PMD_SECT_CACHEABLE; > > + > > + if (cpu_architecture() >= CPU_ARCH_ARMv7) { > > + if (pte & PTE_EXT_NG) > > + pmd |= PMD_SECT_nG; > > + if (pte & PTE_EXT_XN) > > + pmd |= PMD_SECT_XN; > > Note that at least, claims these bits are v6+: > > #define PTE_EXT_XN (1 << 0) /* v6 */ > #define PMD_SECT_nG (1 << 17) /* v6 */ Yes, I know. We only seem to use them on ARMv7+ though, so I decided to honour these flags on ARMv7+ only. Sascha -- 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 |