From nobody Tue Sep 16 23:52:54 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 687ABC4332F for ; Wed, 28 Dec 2022 07:31:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232506AbiL1HbV (ORCPT ); Wed, 28 Dec 2022 02:31:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232475AbiL1Hal (ORCPT ); Wed, 28 Dec 2022 02:30:41 -0500 Received: from wout5-smtp.messagingengine.com (wout5-smtp.messagingengine.com [64.147.123.21]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 088B2F58C for ; Tue, 27 Dec 2022 23:30:41 -0800 (PST) Received: from compute2.internal (compute2.nyi.internal [10.202.2.46]) by mailout.west.internal (Postfix) with ESMTP id C98BA320092B; Wed, 28 Dec 2022 02:30:39 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Wed, 28 Dec 2022 02:30:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=russell.cc; h=cc :cc:content-transfer-encoding:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:sender :subject:subject:to:to; s=fm3; t=1672212639; x=1672299039; bh=Br FC+57y08hRIR+Z3gCskLpXrFWtKi5jsyNeZhcK7F0=; b=MzHkDSTeWqYBp25vS1 T2Dw05oAOs4l89qU0oLHNXQQDp+x5IobZkCLYBXW0xRhR5E3qG4WC/jiBGRVdaoa FvbjAB6S0/kvsqZUoTDfHjWQTWNMELVxvNMwb75ESsSSEMrpmTVCcGKxiagGRsir KPxwILrYE6z+2ZTkjGKeVTGrNQeLAU90x3DF+EDBqS0qfJltJmuexrhbU0nhKAUj cmxvt7X5/n5P0PcUoqHSuSd2PVgOWgMIP8YyCp7UVsYk++yDqKPIYSIpxz5KxVDT zwAV9efRGy6szHKa3P7UTtYUtpIoVXX7l2KYMz3UJn77052PuhfRJNkWMsXjAQms KC8A== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:sender:subject :subject:to:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm2; t=1672212639; x=1672299039; bh=BrFC+57y08hRI R+Z3gCskLpXrFWtKi5jsyNeZhcK7F0=; b=NWs1T5Nzd557sJFnJxB+8HVaZ/gY5 7ELJ2ZzgnPPfAjRgqQF5HNt3Wy1ub5ywFVFHOoCtlkg5n/DrzWi7WWENYY1cVKgq psqWiPliuieZaWfBbQ0VuxzAzWcpU+LM73Xwi1SxQrSx2/KLrGfZR3/JdlbbaPNr 8G/2B8r7w5wvfqTKA2rlRrPAiAeXsrsR1kFRvSsgYxCkeoOD7gNahTzVmtdNyg/8 Tyo1g5lwve0GD3DB69TyEox1n8hyhBvCEwBFZ2f75yVK3D1FVgPK5QtJNt1ABo/L hP1q4qFLOSOiW/pq3Ohz8P7K/IYHm3jwL16JAE/Qob+SlwJNyXFBhoL4w== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedriedugdduuddtucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucgfrhhlucfvnfffucdlfedtmdenucfjughrpefhvf evufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpeftuhhsshgvlhhlucevuhhr rhgvhicuoehruhhstghurhesrhhushhsvghllhdrtggtqeenucggtffrrghtthgvrhhnpe fhvdeugfdtvdeiieegffefffekieegvdfgiedtjeetffevfefhtdehjeffieeivdenucev lhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehruhhstghurh esrhhushhsvghllhdrtggt X-ME-Proxy: Feedback-ID: i4421424f:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 28 Dec 2022 02:30:36 -0500 (EST) From: Russell Currey To: linuxppc-dev@lists.ozlabs.org Cc: gregkh@linuxfoundation.org, gcwilson@linux.ibm.com, linux-kernel@vger.kernel.org, nayna@linux.ibm.com, ajd@linux.ibm.com, zohar@linux.ibm.com, mpe@ellerman.id.au, Russell Currey Subject: [PATCH 4/6] powerpc/secvar: Handle max object size in the consumer Date: Wed, 28 Dec 2022 18:29:41 +1100 Message-Id: <20221228072943.429266-5-ruscur@russell.cc> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221228072943.429266-1-ruscur@russell.cc> References: <20221228072943.429266-1-ruscur@russell.cc> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Currently the max object size is handled in the core secvar code with an entirely OPAL-specific implementation, so create a new max_size() op and move the existing implementation into the powernv platform. Should be no functional change. Signed-off-by: Russell Currey --- arch/powerpc/include/asm/secvar.h | 1 + arch/powerpc/kernel/secvar-sysfs.c | 17 +++-------------- arch/powerpc/platforms/powernv/opal-secvar.c | 19 +++++++++++++++++++ 3 files changed, 23 insertions(+), 14 deletions(-) diff --git a/arch/powerpc/include/asm/secvar.h b/arch/powerpc/include/asm/s= ecvar.h index 3b7e5a3625bd..92d2c051918b 100644 --- a/arch/powerpc/include/asm/secvar.h +++ b/arch/powerpc/include/asm/secvar.h @@ -21,6 +21,7 @@ struct secvar_operations { int (*set)(const char *key, uint64_t key_len, u8 *data, uint64_t data_size); ssize_t (*format)(char *buf); + int (*max_size)(uint64_t *max_size); }; =20 #ifdef CONFIG_PPC_SECURE_BOOT diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secva= r-sysfs.c index daf28b11866f..ea408763dc78 100644 --- a/arch/powerpc/kernel/secvar-sysfs.c +++ b/arch/powerpc/kernel/secvar-sysfs.c @@ -122,27 +122,16 @@ static struct kobj_type secvar_ktype =3D { static int update_kobj_size(void) { =20 - struct device_node *node; u64 varsize; - int rc =3D 0; + int rc =3D secvar_ops->max_size(&varsize); =20 - node =3D of_find_compatible_node(NULL, NULL, "ibm,secvar-backend"); - if (!of_device_is_available(node)) { - rc =3D -ENODEV; - goto out; - } - - rc =3D of_property_read_u64(node, "max-var-size", &varsize); if (rc) - goto out; + return rc; =20 data_attr.size =3D varsize; update_attr.size =3D varsize; =20 -out: - of_node_put(node); - - return rc; + return 0; } =20 static int secvar_sysfs_load(void) diff --git a/arch/powerpc/platforms/powernv/opal-secvar.c b/arch/powerpc/pl= atforms/powernv/opal-secvar.c index cd5b5c06c091..3ef6b9afd129 100644 --- a/arch/powerpc/platforms/powernv/opal-secvar.c +++ b/arch/powerpc/platforms/powernv/opal-secvar.c @@ -125,11 +125,30 @@ static ssize_t opal_secvar_format(char *buf) return rc; } =20 +static int opal_secvar_max_size(uint64_t *max_size) +{ + int rc; + struct device_node *node; + + node =3D of_find_compatible_node(NULL, NULL, "ibm,secvar-backend"); + if (!of_device_is_available(node)) { + rc =3D -ENODEV; + goto out; + } + + rc =3D of_property_read_u64(node, "max-var-size", max_size); + +out: + of_node_put(node); + return rc; +} + static const struct secvar_operations opal_secvar_ops =3D { .get =3D opal_get_variable, .get_next =3D opal_get_next_variable, .set =3D opal_set_variable, .format =3D opal_secvar_format, + .max_size =3D opal_secvar_max_size, }; =20 static int opal_secvar_probe(struct platform_device *pdev) --=20 2.38.1