From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=185.246.84.56 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792570200; b=HDlj0ENXXdcpYvQecE0NSFRUnMwUBlB8xvVQqbg5dYzjfJrKzaJpHaQ2vUufnbfsU9PV 4izF5SPRLLpX8qde03xJ3oSdKnE/VVLjSsFU2dL1FIo0bnb4+rnM04OWHxF3BIKOcrdPN A6hpRuXk/hKU1kcWTE6LaS0mkSbwGGutAJ7+vFCLI3lyKEgI7z/62PycRY4KObfHx60HZ jQfyqAdFDNyM+5j5/b8XSGHcQP4LatMnMHR17ETXPMRnHHadUP3SQb3NkACqeZ3QjR16e JgYttScDq9WXk5SQaEmv2v4vjfAYYdbwzkOww1WF+8QP7GZHtBB3rvJdFzAat1edaWQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792570200; h=DMARC-Filter:Received:Received:Received:DKIM-Signature:From:To:Cc: Subject:Date:Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding:X-Last-TLS-Session-Version; bh=km6joHkwcxH7CACYh2zbb3xiLfYHLA+77WxK652vDwg=; b=wEM4hkp8lF8m+8l0QOmgl5ruI6pfexVnKjpQ0ssaQ+u4Gw118QPgjMqcU7L1tltuTTtG 793a5KFwKBCeoW7oEU81xmR1CVf0tq0GEE56c0LYonwvPegxUFXxeh2+53pgAVB0Zeu4F RoRvsgOzw3oW14o+Ei9ICj7M4kN8vsQ/eFqL28S642ZiJHfpj8pZ87lk2yeFzRoZowZj4 bByHMfxG2qmolDRza83T95sGy/cB6KVMCo2yXHPk7leeuTtRgdrkfQEv1cW7HsxI9kH/j rXfygVXWfNQsD7LZGSh7nq/XQz4jqNs92vD8/o1C6C9vysJVER9BU46hSfJStFrlOmQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=dkim header.b=fM6fAgeh; arc=none smtp.remote-ip=185.246.84.56 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2BC9606A322 for ; Wed, 21 Oct 2026 08:09:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org F2BC9606A322 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, unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=dkim header.b=fM6fAgeh Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id D477D1A12AD; Wed, 21 Oct 2026 08:09:57 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id A8520606E3; Wed, 21 Oct 2026 08:09:57 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 0339D10328D61; Wed, 21 Oct 2026 10:09:54 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1792570196; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=km6joHkwcxH7CACYh2zbb3xiLfYHLA+77WxK652vDwg=; b=fM6fAgehrLndt57TzGIEIEpR1UIsINEzVwMBNBQr5yVRmpO145/0JiGtSMERL2WLTRdRXN xyl2Xaglj7w9mPTC3kHUloeMZ7cm42ldkMAImlyaTVg31l9nSKtVHjiDGKExCbVqv4+hzp UESISZau6NB0FkcDLgm+HJ/xOB+DM5xXzJXQZL1DJkKqSF9LGqOod1wvGhjWyAAGvfazr8 /kRFVb6TeKGjzda278kNQbXkcLN8RtFqPY9UzYngXdWO1M+EdrjprbiB5mFVxrxasNSELG WLTJFrX45UEzPFGYSITDYFqe4J0/jAAS8Ej+6TTAMwpN/IVObtKJW4fA1tdmWg== 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 v5 2/6] remoteproc: k3: skip mapping firewalled lpm-metadata memory region Date: Wed, 21 Oct 2026 10:09:43 +0200 Message-ID: <20261021080947.3747284-3-richard.genoud@bootlin.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20261021080947.3747284-1-richard.genoud@bootlin.com> References: <20261021080947.3747284-1-richard.genoud@bootlin.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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..baebb5de56f8 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 %pR\n", + region_name, &res); + 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; }