From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 13 Apr 2026 12:28:44 +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 1wCEX6-00Bga5-0V for lore@lore.pengutronix.de; Mon, 13 Apr 2026 12:28:44 +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 1wCEX5-0003wv-KZ for lore@pengutronix.de; Mon, 13 Apr 2026 12:28:44 +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: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=P2IzLeZNHp2g+KqQNiADQOmd4DSpjpN+G4C5WeeD2f8=; b=2zcpzawUZF2FDC6RLvEqOnE/vc /6RT0sIWKpk71gGeLm9Q9+xBnwyrd7cvuPvQKe5Z1jWR46t93kutPWiaZGYegG0acpFKNxkrj2IUx 4mt4/cqcSKWHKcAUz7Z2h6l3Z2tEqHeNelFIrsomLo9KjUEPIzYM6lvcFi+gbyw6uQpEBmI7+KpEZ ++i7Dr5HXuq+Qk7ElSL0tc9UHflqspN5FcVpJICsFDswhi0RScKhtwms/mZN60YaKcOAYtmODAhQA BDcnDXBuO/9APeu9CCgNyKdTCOpqcdj2oCICYkvN8Hv8zHgP89c64flt4RQMAwahTs/wOtyySp16H X6sycA3g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCEWg-0000000FUXp-3uks; Mon, 13 Apr 2026 10:28:18 +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 1wCEWd-0000000FUWq-49DC for barebox@lists.infradead.org; Mon, 13 Apr 2026 10:28:18 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=geraet.lan) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wCEWc-0003pC-2J; Mon, 13 Apr 2026 12:28:14 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Mon, 13 Apr 2026 12:28:12 +0200 Message-ID: <20260413102812.1481805-1-a.fatoum@barebox.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260413_032816_028137_CB3582FD X-CRM114-Status: UNSURE ( 8.41 ) 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=-5.0 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: [PATCH] mem: add flush callback to sync caches for execution 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) barebox always calls sync_caches_for_execution() on boot, but it can be useful to trigger it manually when testing: - memcpy -s /dev/zero -d /dev/mem 0 $TFA_REGION_BASE $TFA_REGION_SIZE - sync /dev/mem # flush D$ and invalidate I$ - smc -i # check if PSCI monitor is still usable Signed-off-by: Ahmad Fatoum --- drivers/misc/mem.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/misc/mem.c b/drivers/misc/mem.c index 0cf021cf97ba..b356c6eab389 100644 --- a/drivers/misc/mem.c +++ b/drivers/misc/mem.c @@ -6,11 +6,19 @@ #include #include #include +#include + +static int mem_flush(struct cdev *cdev) +{ + sync_caches_for_execution(); + return 0; +} static struct cdev_operations memops = { .read = mem_read, .write = mem_write, .memmap = generic_memmap_rw, + .flush = mem_flush, }; static int mem_probe(struct device *dev) -- 2.47.3