From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 14 Apr 2026 10:07:30 +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 1wCYny-00C0hl-1P for lore@lore.pengutronix.de; Tue, 14 Apr 2026 10:07:30 +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 1wCYnx-0003Qd-Td for lore@pengutronix.de; Tue, 14 Apr 2026 10:07:30 +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:References:In-Reply-To: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:List-Owner; bh=qJCDgkPZbmbqFzPsaLSY+XETXnKC+ISNRFZQUVjHhfU=; b=CSH4IARDOaX4QilRTrQv+LmjOB kwXS6zWW6PSqd+LwP9oVIAe9LNSX9dPJpzBGgADd3dtv32mpg79t/scfCJAanvGm/QSDhQtjatnAD XQmkGjOPQygvkMN4LBnUPPUlEBZwR6lkiv3QB8y4opqia9RQ7HH6FXIU/Q4b9lkWHjdqCvQDN3yFd OQzOG9TSD6OC+QsJ7MbBlZdcrZRBTa1df6ERctfMU4ww0g6h4vfD0bMUeElSjRnzBNR54exxPYNh7 dZSJ5UWMzzXhZ4rSI/GJRR6F9kxK9WDBZqNaUNgg1kKKbY4uV2Wq+2Xs4DwAHRr3TFB70N+WWfQ++ Kg6wUxuA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCYnR-0000000GwZr-139P; Tue, 14 Apr 2026 08:06:57 +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 1wCYnP-0000000GwXr-15c7 for barebox@lists.infradead.org; Tue, 14 Apr 2026 08:06:56 +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 1wCYnN-0003FV-HB; Tue, 14 Apr 2026 10:06:53 +0200 Received: from dude05.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::54]) 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 1wCYnN-005J1T-14; Tue, 14 Apr 2026 10:06:53 +0200 Received: from [::1] (helo=dude05.red.stw.pengutronix.de) by dude05.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1wCYnN-00000001fRr-0zhz; Tue, 14 Apr 2026 10:06:53 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Tue, 14 Apr 2026 10:06:30 +0200 Message-ID: <20260414080652.397582-3-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260414080652.397582-1-a.fatoum@pengutronix.de> References: <20260414080652.397582-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260414_010655_296050_A3D30A7E X-CRM114-Status: GOOD ( 10.03 ) 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=-5.2 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 v2 3/3] 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) From: Ahmad Fatoum 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 --- v1 -> v2: - no change --- 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