From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 01C9A49B5A4 for ; Mon, 21 Sep 2026 14:53:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790002424; cv=none; b=aqSz6Fxu6R/JeNxSeohsMAN7EqhmFE856uEFs0YNBO5sS29Y1xd+RP68od2K0VH3C5KLtXigfIGfAlwVCaqONmo4YYIMVaxK8f3myKj44pM8n8MXEGIUCy+N8A5SwSSR3IWuxv72NvjAmwdcPTvjE7cqEgGiZSXpKXz0yKZb+kU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790002424; c=relaxed/simple; bh=rocu/2yiUQErYtrWbo5Fb766lw4uQcZyhJUqnN81NX0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aenLi4qwhd0XHhX0ZXj97qn6e986MXb088yt44zj+UmZpUGPcwqEj35S3tf+fa9jYR328aP3hNw10MimfqLlc9nzi+bGxPxvBks5W5lmOwKjWgGTzryjXV5B1fqcXk/y+9zhkt7963NAblNrtfRDJPkEUnEo2xq1oFyj2ZgWmzo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=CYywDKnD; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="CYywDKnD" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 7E94A1A08AC; Mon, 21 Sep 2026 14:53:39 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 516145FFB2; Mon, 21 Sep 2026 14:53:39 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id A496410329195; Mon, 21 Sep 2026 16:53:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1790002418; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=0XfNnwLyPIHZJJHZc9uvlNXqC+VY2k4WOMmJttsUxZQ=; b=CYywDKnDvk9aFqMxlv6rjV8pv7s5pTRKvsjsFHHqklPUkYi4PfsJ7lzV/w71eD6MXdnwLZ boV48QUg5Rn7q3avxt6OJ10X6hMiD4qjRVg6rSK6xg6AjYDk68pO/z3+8Dy4zfmE5V6kqg 6gkJNCoeAXZM1p/RTP/7e2IIfPDnwDFgnKJGbBRFGdpCHCSYfuIZjpLlyFBqJoeriwl3Ta wi+x7ybMb8+u20hQvntPNiHsU51HeSFNk4Lr8frWEk603DawjSR0wUk1EHapVGXPSicZg9 wyu5xVEo2CAF6haDcVI9psOOV2tEm4lmasUJPTMmxR/SJZK9I6DX/rNvSs6i0g== From: "Richard Genoud (TI)" To: Nishanth Menon , Vignesh Raghavendra Cc: Tero Kristo , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Udit Kumar , Abhash Kumar , Beleswar Padhi , Thomas Richard , Gregory CLEMENT , Thomas Petazzoni , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Richard Genoud Subject: [PATCH v4 2/7] remoteproc: k3: skip mapping firewalled lpm-metadata memory region Date: Mon, 21 Sep 2026 16:53:20 +0200 Message-ID: <20260921145325.300025-3-richard.genoud@bootlin.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260921145325.300025-1-richard.genoud@bootlin.com> References: <20260921145325.300025-1-richard.genoud@bootlin.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 The region lpm-metadata is firewalled by TIFS on Jacinto devices, so it should not be mapped to prevent speculative access crashes Just skip this memory region during initialization. Signed-off-by: Richard Genoud (TI) --- drivers/remoteproc/ti_k3_common.c | 36 +++++++++++++++++++++---------- 1 file changed, 25 insertions(+), 11 deletions(-) diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c index 3cb8ae5d72f6..5158e5e7c816 100644 --- a/drivers/remoteproc/ti_k3_common.c +++ b/drivers/remoteproc/ti_k3_common.c @@ -471,7 +471,7 @@ int k3_reserved_mem_init(struct k3_rproc *kproc) struct device *dev = kproc->dev; struct device_node *np = dev->of_node; int num_rmems; - int ret, i; + int ret, i, j; num_rmems = of_reserved_mem_region_count(np); if (num_rmems < 0) { @@ -501,30 +501,44 @@ int k3_reserved_mem_init(struct k3_rproc *kproc) return -ENOMEM; /* use remaining reserved memory regions for static carveouts */ - for (i = 0; i < num_rmems; i++) { + for (j = 0, i = 0; i < num_rmems; i++) { struct resource res; + const char *region_name; ret = of_reserved_mem_region_to_resource(np, i + 1, &res); if (ret) return ret; - kproc->rmem[i].bus_addr = res.start; + ret = of_property_read_string_index(np, "memory-region-names", + i + 1, ®ion_name); + /* + * lpm-metadata is a firewalled region accessible only by TIFS. + * Skip mapping it to avoid speculative access crashes. + */ + if (!ret && !strcmp(region_name, "lpm-metadata")) { + dev_dbg(dev, "Skipping firewalled memory region %s @0x%x\n", + region_name, (u32)res.start); + continue; + } + + kproc->rmem[j].bus_addr = res.start; /* 64-bit address regions currently not supported */ - kproc->rmem[i].dev_addr = (u32)res.start; - kproc->rmem[i].size = resource_size(&res); - kproc->rmem[i].cpu_addr = devm_ioremap_resource_wc(dev, &res); - if (IS_ERR(kproc->rmem[i].cpu_addr)) { + kproc->rmem[j].dev_addr = (u32)res.start; + kproc->rmem[j].size = resource_size(&res); + kproc->rmem[j].cpu_addr = devm_ioremap_resource_wc(dev, &res); + if (IS_ERR(kproc->rmem[j].cpu_addr)) { dev_err(dev, "failed to map reserved memory#%d at %pR\n", i + 1, &res); return -ENOMEM; } dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %p da 0x%x\n", - i + 1, &kproc->rmem[i].bus_addr, - kproc->rmem[i].size, kproc->rmem[i].cpu_addr, - kproc->rmem[i].dev_addr); + j + 1, &kproc->rmem[j].bus_addr, + kproc->rmem[j].size, kproc->rmem[j].cpu_addr, + kproc->rmem[j].dev_addr); + j++; } - kproc->num_rmems = num_rmems; + kproc->num_rmems = j; return 0; }