From mboxrd@z Thu Jan 1 00:00:00 1970 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 93882C4332F for ; Mon, 25 Apr 2022 17:17:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243872AbiDYRUT (ORCPT ); Mon, 25 Apr 2022 13:20:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243983AbiDYRTr (ORCPT ); Mon, 25 Apr 2022 13:19:47 -0400 Received: from mail-oi1-x22a.google.com (mail-oi1-x22a.google.com [IPv6:2607:f8b0:4864:20::22a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5E4726AC4 for ; Mon, 25 Apr 2022 10:16:38 -0700 (PDT) Received: by mail-oi1-x22a.google.com with SMTP id t15so17859725oie.1 for ; Mon, 25 Apr 2022 10:16:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eclypsium.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dBhJQBFFy4Ceg8cAsnJhQlAVWnX2jFGl2toK7LYg2vI=; b=ZUI1SW0LDagU7wptgLkLAyo11l74Ya3MsuwD1LvUoGpHB7JFCD9eGwk+TPuFbsg94J 1/2jlCIpJxuoSUuRE77FpuY8ivlJycTuspgiLAQKEm++YBdSPzIgc1bCHwvyU3bM1OIx QVQlUy6mpNLw/RH+old6c5hmH0AGxCuRDi6JZa0UvmfRHrSkPnUMz3ibircJSgTzvhqv vzyJoGr57dosEvqOjyqJIo0/ae+ilr8gmRG4Nybz3RfmwCFa0D2hnsmc/RJNg/8pRgkF kbG9O8mJJfwfTK2t76xzeoPxWz1lE+4Zb2NHMLo5de+3pUBSoQI789poPU5L2Sskqw9r QDHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=dBhJQBFFy4Ceg8cAsnJhQlAVWnX2jFGl2toK7LYg2vI=; b=WlosovNO2PqrGdq9NSkiGFFSY9Kt+ROu3yY6NagpfnQgBLaBR0vqTiOWSgOJEqZP7e LSWcQyLktFZK6wepXMCWB8XndgJKbPGemntdLX88FNLpdfZuQ0U/CBVS2ebavZUXNzTN 1n6DKA3hihe0Aki9beKswKtujt3kTyu6MWs54rZyyHtOo1cCyNz3O7isSxeLXbnIXznE znT9NE13o8cArFFplBKB9piN9Tv/0cs4rygbgAgovw6A4KSydD2Xu+DhU8B+LhSC7oWJ mXl1jhOWrPw6LXQ1iEGVEJF/GklJliLz2meKLnVO8eQfcpTQBI9hsXZiuZHTKtBfc87L jWmQ== X-Gm-Message-State: AOAM532f0LHekJJviEIdUrJOmGn8TA04jw7EZai0Ta/EUAWM8L6taVZL 8np/sf5KQ1qWRDtpCO+vTfS9oQOWHMSMycbYoo2nfuYFwTe/zYwprSkmELW4pHcdoMC2IZ1gzqh YUFefm7/HSOOM2Eh/eASmI+UTWbS97ixq8vIErD2PhfigAIMrNpz504wk+AUU/Yar2r5+TZn6Zc NSb/QFO/QJtyFBNFOiisw= X-Google-Smtp-Source: ABdhPJw2CA5OnWQr+1gbJ1Fj/HVda/dNTu+4D8Lx2yhRTTRMdTF6nMZAB44F7+DCfcQSISEqTGmGkw== X-Received: by 2002:a54:4d86:0:b0:324:ecc3:fd02 with SMTP id y6-20020a544d86000000b00324ecc3fd02mr7359683oix.243.1650906997950; Mon, 25 Apr 2022 10:16:37 -0700 (PDT) Received: from localhost ([181.97.174.128]) by smtp.gmail.com with ESMTPSA id fz13-20020a056870ed8d00b000e593f1f26fsm3441269oab.18.2022.04.25.10.16.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Apr 2022 10:16:37 -0700 (PDT) From: Martin Fernandez To: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, ardb@kernel.org, dvhart@infradead.org, andy@infradead.org, gregkh@linuxfoundation.org, rafael@kernel.org, rppt@kernel.org, akpm@linux-foundation.org, daniel.gutson@eclypsium.com, hughsient@gmail.com, alex.bazhaniuk@eclypsium.com, alison.schofield@intel.com, keescook@chromium.org, Martin Fernandez Subject: [PATCH v7 8/8] drivers/node: Show in sysfs node's crypto capabilities Date: Mon, 25 Apr 2022 14:15:26 -0300 Message-Id: <20220425171526.44925-9-martin.fernandez@eclypsium.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220425171526.44925-1-martin.fernandez@eclypsium.com> References: <20220425171526.44925-1-martin.fernandez@eclypsium.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Show in each node in sysfs if its memory is able to do be encrypted by the CPU, ie. if all its memory is marked with EFI_MEMORY_CPU_CRYPTO in the EFI memory map. Signed-off-by: Martin Fernandez --- Documentation/ABI/testing/sysfs-devices-node | 10 ++++++++++ drivers/base/node.c | 10 ++++++++++ 2 files changed, 20 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-devices-node diff --git a/Documentation/ABI/testing/sysfs-devices-node b/Documentation/ABI/testing/sysfs-devices-node new file mode 100644 index 000000000000..5fd5dc7fc2eb --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-node @@ -0,0 +1,10 @@ +What: /sys/devices/system/node/nodeX/crypto_capable +Date: April 2022 +Contact: Martin Fernandez +Users: fwupd (https://fwupd.org) +Description: + This value is 1 if all system memory in this node is + marked with EFI_MEMORY_CPU_CRYPTO, indicating that the + system memory is capable of being protected with the + CPU’s memory cryptographic capabilities. It is 0 + otherwise. \ No newline at end of file diff --git a/drivers/base/node.c b/drivers/base/node.c index ec8bb24a5a22..1df15ea03c27 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -560,11 +560,21 @@ static ssize_t node_read_distance(struct device *dev, } static DEVICE_ATTR(distance, 0444, node_read_distance, NULL); +static ssize_t crypto_capable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pglist_data *pgdat = NODE_DATA(dev->id); + + return sysfs_emit(buf, "%d\n", pgdat->crypto_capable); +} +static DEVICE_ATTR_RO(crypto_capable); + static struct attribute *node_dev_attrs[] = { &dev_attr_meminfo.attr, &dev_attr_numastat.attr, &dev_attr_distance.attr, &dev_attr_vmstat.attr, + &dev_attr_crypto_capable.attr, NULL }; -- 2.30.2