From patchwork Thu Dec 16 19:22:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Fernandez X-Patchwork-Id: 12682397 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63B3DC4332F for ; Thu, 16 Dec 2021 19:23:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A9BCE6B0075; Thu, 16 Dec 2021 14:23:11 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A4AF46B0078; Thu, 16 Dec 2021 14:23:11 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8EBE36B007B; Thu, 16 Dec 2021 14:23:11 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0075.hostedemail.com [216.40.44.75]) by kanga.kvack.org (Postfix) with ESMTP id 81B966B0075 for ; Thu, 16 Dec 2021 14:23:11 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 4090C88CC0 for ; Thu, 16 Dec 2021 19:23:01 +0000 (UTC) X-FDA: 78924630162.18.E57C3E2 Received: from mail-qt1-f173.google.com (mail-qt1-f173.google.com [209.85.160.173]) by imf30.hostedemail.com (Postfix) with ESMTP id C0BA680020 for ; Thu, 16 Dec 2021 19:23:00 +0000 (UTC) Received: by mail-qt1-f173.google.com with SMTP id n15so337355qta.0 for ; Thu, 16 Dec 2021 11:23:00 -0800 (PST) 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=YZB6hNG7HmOAiIB6oy3KuM5EzuvMU42E5iksCY/2vUM=; b=Pi5sf1tb1XznajBAmIX9D4g+kNsNyo67QRx52LUE7C9HLtq95LDHpRayttoV5kCwxV ERwi+eIKqJ7ipi3O3aabqVOeJCjT2dyeeF0upOcI34+E5h7PNXpTb3rS2PNPFZC8t80y S50A5f6ZqrjsktzA70fMIXVJXiNaW+opCn/4LB0IwUfYpT/UtS2nwokYWHlhwgnWsQkr Tb4102n7YQ5Sgv9YfWH2MvUGbWj3X6zBTMDdS+VgOagdLhkUXIBJoGewxOH/RrfOFDHr fKF7vbwVd9v26m6knL15Hz1Oc4/MKIOR+4aajMFCJbm5lIAVO77wZZ68/El7m537PoUT WBoQ== 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=YZB6hNG7HmOAiIB6oy3KuM5EzuvMU42E5iksCY/2vUM=; b=m7bn/A5JQYdBg9DnATDCzeADuexg4EGNyXbgfk5MjB04spnMzR4ha56fLMZn8GhM8e u+oG6MAsxqbOHkiyKFCQldMYp95VmRcbwly3pWSthJA7VM2+fNg6O4loWGHeYMxVCz+m gAam2ko6IbCyVo/i5hx54ikf9GeEIQHQKT91QKcdvKSD9G/4X0KZb9qj5/hO2IsgZ+XJ qnDDIJxsnFix+9aXD08qFTWr26e1SYo/B97M3wPeYbFIvADMAcecazrLDV9g/PawZefz cj1gUAwTDucT30NwsxkoykmyMpKDb4+DEHggkYm4h1Yh+QVFvVAPaqZlyMXWdGiNnWFN n/lQ== X-Gm-Message-State: AOAM533ChtDV48vCqj2vozyHG/xvWMbbxYZ68yGFSD/KKX7ZjJFIS1Au AJn6hr2gEBx1PttXSUXTIPa8yw== X-Google-Smtp-Source: ABdhPJxttAvT5PEtSppYoHkQKZU2uMFF6IyCGbs3W0CeLSZRpLAgBo7ZZHpmTixm+dkExMgKkFrdLg== X-Received: by 2002:ac8:5710:: with SMTP id 16mr18733049qtw.140.1639682579842; Thu, 16 Dec 2021 11:22:59 -0800 (PST) Received: from localhost (7-153-16-190.fibertel.com.ar. [190.16.153.7]) by smtp.gmail.com with ESMTPSA id ay36sm3289445qkb.60.2021.12.16.11.22.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Dec 2021 11:22:59 -0800 (PST) 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, Martin Fernandez Subject: [PATCH v4 1/5] mm/memblock: Tag memblocks with crypto capabilities Date: Thu, 16 Dec 2021 16:22:18 -0300 Message-Id: <20211216192222.127908-2-martin.fernandez@eclypsium.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211216192222.127908-1-martin.fernandez@eclypsium.com> References: <20211216192222.127908-1-martin.fernandez@eclypsium.com> MIME-Version: 1.0 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: C0BA680020 X-Stat-Signature: n37k3sq4wnp4hbc5dnac7zpmhcuacni5 Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=eclypsium.com header.s=google header.b=Pi5sf1tb; spf=pass (imf30.hostedemail.com: domain of martin.fernandez@eclypsium.com designates 209.85.160.173 as permitted sender) smtp.mailfrom=martin.fernandez@eclypsium.com; dmarc=pass (policy=quarantine) header.from=eclypsium.com X-HE-Tag: 1639682580-805379 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add the capability to mark regions of the memory memory_type able of hardware memory encryption. Also add the capability to query if all regions of a memory node are able to do hardware memory encryption to call it when initializing the nodes. Signed-off-by: Martin Fernandez --- include/linux/memblock.h | 5 ++++ mm/memblock.c | 49 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 8adcf1fa8096..ec808ad93693 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -41,6 +41,7 @@ extern unsigned long long max_possible_pfn; * via a driver, and never indicated in the firmware-provided memory map as * system RAM. This corresponds to IORESOURCE_SYSRAM_DRIVER_MANAGED in the * kernel resource tree. + * @MEMBLOCK_CRYPTO_CAPABLE: capable of hardware encryption */ enum memblock_flags { MEMBLOCK_NONE = 0x0, /* No special request */ @@ -48,6 +49,7 @@ enum memblock_flags { MEMBLOCK_MIRROR = 0x2, /* mirrored region */ MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */ MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */ + MEMBLOCK_CRYPTO_CAPABLE = 0x10, /* capable of hardware encryption */ }; /** @@ -121,6 +123,9 @@ int memblock_physmem_add(phys_addr_t base, phys_addr_t size); void memblock_trim_memory(phys_addr_t align); bool memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size); +bool memblock_node_is_crypto_capable(int nid); +int memblock_mark_crypto_capable(phys_addr_t base, phys_addr_t size); +int memblock_clear_crypto_capable(phys_addr_t base, phys_addr_t size); int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); diff --git a/mm/memblock.c b/mm/memblock.c index 1018e50566f3..61ec50647469 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -191,6 +191,27 @@ bool __init_memblock memblock_overlaps_region(struct memblock_type *type, return i < type->cnt; } +/** + * memblock_node_is_crypto_capable - get if whole node is capable + * of encryption + * @nid: number of node + * + * Iterate over all memory memblock_type and find if all regions under + * node @nid are capable of hardware encryption. + */ +bool __init_memblock memblock_node_is_crypto_capable(int nid) +{ + struct memblock_region *region; + + for_each_mem_region(region) { + if ((memblock_get_region_node(region) == nid) && + !(region->flags & MEMBLOCK_CRYPTO_CAPABLE)) + return false; + } + + return true; +} + /** * __memblock_find_range_bottom_up - find free area utility in bottom-up * @start: start of candidate range @@ -885,6 +906,34 @@ static int __init_memblock memblock_setclr_flag(phys_addr_t base, return 0; } +/** + * memblock_mark_crypto_capable - Mark memory regions capable of hardware + * encryption with flag MEMBLOCK_CRYPTO_CAPABLE. + * @base: the base phys addr of the region + * @size: the size of the region + * + * Return: 0 on success, -errno on failure. + */ +int __init_memblock memblock_mark_crypto_capable(phys_addr_t base, + phys_addr_t size) +{ + return memblock_setclr_flag(base, size, 1, MEMBLOCK_CRYPTO_CAPABLE); +} + +/** + * memblock_clear_crypto_capable - Clear flag MEMBLOCK_CRYPTO for a + * specified region. + * @base: the base phys addr of the region + * @size: the size of the region + * + * Return: 0 on success, -errno on failure. + */ +int __init_memblock memblock_clear_crypto_capable(phys_addr_t base, + phys_addr_t size) +{ + return memblock_setclr_flag(base, size, 0, MEMBLOCK_CRYPTO_CAPABLE); +} + /** * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. * @base: the base phys addr of the region From patchwork Thu Dec 16 19:22:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Fernandez X-Patchwork-Id: 12682399 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4CC4FC433F5 for ; Thu, 16 Dec 2021 19:24:01 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4F6676B0078; Thu, 16 Dec 2021 14:23:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 4A53E6B007B; Thu, 16 Dec 2021 14:23:24 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 346676B007D; Thu, 16 Dec 2021 14:23:24 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0078.hostedemail.com [216.40.44.78]) by kanga.kvack.org (Postfix) with ESMTP id 270E36B0078 for ; Thu, 16 Dec 2021 14:23:24 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id D254485302 for ; 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[190.16.153.7]) by smtp.gmail.com with ESMTPSA id j16sm4962737qtx.92.2021.12.16.11.23.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Dec 2021 11:23:11 -0800 (PST) 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, Martin Fernandez Subject: [PATCH v4 2/5] mm/mmzone: Tag pg_data_t with crypto capabilities Date: Thu, 16 Dec 2021 16:22:19 -0300 Message-Id: <20211216192222.127908-3-martin.fernandez@eclypsium.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211216192222.127908-1-martin.fernandez@eclypsium.com> References: <20211216192222.127908-1-martin.fernandez@eclypsium.com> MIME-Version: 1.0 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 3EBBD1C001C X-Stat-Signature: bo1y57m4zi4hr3ecx1rzcr1cwb6fkqap Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=eclypsium.com header.s=google header.b=gKWKpH+n; spf=pass (imf21.hostedemail.com: domain of martin.fernandez@eclypsium.com designates 209.85.160.179 as permitted sender) smtp.mailfrom=martin.fernandez@eclypsium.com; dmarc=pass (policy=quarantine) header.from=eclypsium.com X-HE-Tag: 1639682589-20514 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add a new member in the pg_data_t struct tell whether the node corresponding to that pg_data_t is able to do hardware memory encryption. This will be read from sysfs. Signed-off-by: Martin Fernandez --- include/linux/mmzone.h | 3 +++ mm/page_alloc.c | 1 + 2 files changed, 4 insertions(+) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 58e744b78c2c..1e4f76a19c62 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -870,6 +870,9 @@ typedef struct pglist_data { struct task_struct *kcompactd; bool proactive_compact_trigger; #endif + + bool crypto_capable; + /* * This is a per-node reserve of pages that are not available * to userspace allocations. diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c5952749ad40..8bcbd6fa0089 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -7592,6 +7592,7 @@ static void __init free_area_init_node(int nid) pgdat->node_id = nid; pgdat->node_start_pfn = start_pfn; pgdat->per_cpu_nodestats = NULL; + pgdat->crypto_capable = memblock_node_is_crypto_capable(nid); pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid, (u64)start_pfn << PAGE_SHIFT, From patchwork Thu Dec 16 19:22:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Fernandez X-Patchwork-Id: 12682401 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FDDEC433EF for ; Thu, 16 Dec 2021 19:24:34 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E1DA36B007B; Thu, 16 Dec 2021 14:23:32 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DCDFF6B007D; Thu, 16 Dec 2021 14:23:32 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C6E716B007E; Thu, 16 Dec 2021 14:23:32 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0240.hostedemail.com [216.40.44.240]) by kanga.kvack.org (Postfix) with ESMTP id B98346B007B for ; Thu, 16 Dec 2021 14:23:32 -0500 (EST) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 822B68249980 for ; Thu, 16 Dec 2021 19:23:22 +0000 (UTC) X-FDA: 78924631044.04.E5EBC68 Received: from mail-qk1-f177.google.com (mail-qk1-f177.google.com [209.85.222.177]) by imf25.hostedemail.com (Postfix) with ESMTP id 0A8D4A0013 for ; Thu, 16 Dec 2021 19:23:16 +0000 (UTC) Received: by mail-qk1-f177.google.com with SMTP id de30so12128qkb.0 for ; Thu, 16 Dec 2021 11:23:22 -0800 (PST) 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=W+BCPwrkfsgMMS4oXA2uOS9qbqDP/1NzYAX0XstAOPU=; b=LtMC1dg5tVLwMXBFPf+v2n/bdM2vXwbFTYBALQLLbgL+Tlyt8UqqSFYRBzZgm5hJtB PlN9EoluPLQvdJOY1pAMweK0lbIVZN8tv1l9JtokgxAo6hU8/H6xtll2Pc2Upo+goFOd IOzRMC5ktdEL29SjrUNVuti5Hw3XGZOFAjfgHYuYhrp6uZBa60WKCyvqAGbtc/2E37IY dkkZvXMhgQz9PXmp4tE09PEthLgecsUlx/WeHPjn3HZEJW1jLutVC8OLtDvEnCZMkTDE /Zcxv1WFToNIVEINQRWKB+yc+eGSSXfF4SwV1spENCBEoceBNpLiH/UEeNgBbM7TvxAy Z31Q== 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=W+BCPwrkfsgMMS4oXA2uOS9qbqDP/1NzYAX0XstAOPU=; b=DC0U4wsm0wE0OebWs0VarAukS69LbE47v8PAE3cMrD9RA/Uej/buWW7rn6xdJZPH6m WWbg6sdo8ZwlJxQ8qrrpa3n0xa9av2yX6/P+gSuuRSXUa73IL0em5yS3CnVy7Y1Zq457 RGOKE7UeZq1B/5PBisUDwJwdmna+5EqbpIFb2is00FGcIsbIcNrtSf/5R2fqVkRRYlhS xHdXlMw5HeNPslOgrNYIzgTSQyt3gMRPsKql7jlTn3NSDjoCOGK52QgIuI9uBjxS2ORS 1KUu7AtfeFrjH42hFSBYmwhPbOyxEPjFh2poBh1xkEb3cQB9XLRFdPwYw1PIhQbgqYBt 5gfg== X-Gm-Message-State: AOAM533kkBjMdnPAlGPM5nEEjojseQmpwBFL5A7BiTzwnon9sIrXF1rI BtrieJh/rAEllhyYXAGHRe97VQ== X-Google-Smtp-Source: ABdhPJyII4TMuf9tlEyytZBN5v/y4Y2dwyfW7UaFoDz3QyD92ZYPmat6ljjCCH5MYp4igQxgvQkT6g== X-Received: by 2002:a05:620a:4f6:: with SMTP id b22mr12857484qkh.98.1639682601499; Thu, 16 Dec 2021 11:23:21 -0800 (PST) Received: from localhost (7-153-16-190.fibertel.com.ar. [190.16.153.7]) by smtp.gmail.com with ESMTPSA id bp38sm3383460qkb.66.2021.12.16.11.23.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Dec 2021 11:23:21 -0800 (PST) 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, Martin Fernandez Subject: [PATCH v4 3/5] x86/e820: Tag e820_entry with crypto capabilities Date: Thu, 16 Dec 2021 16:22:20 -0300 Message-Id: <20211216192222.127908-4-martin.fernandez@eclypsium.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211216192222.127908-1-martin.fernandez@eclypsium.com> References: <20211216192222.127908-1-martin.fernandez@eclypsium.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 0A8D4A0013 X-Stat-Signature: 4j1b6oib476egt5rhg9oakrbpaay1mi9 Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=eclypsium.com header.s=google header.b=LtMC1dg5; dmarc=pass (policy=quarantine) header.from=eclypsium.com; spf=pass (imf25.hostedemail.com: domain of martin.fernandez@eclypsium.com designates 209.85.222.177 as permitted sender) smtp.mailfrom=martin.fernandez@eclypsium.com X-Rspamd-Server: rspam02 X-HE-Tag: 1639682596-655989 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add a new member in e820_entry to hold whether an entry is able to do hardware memory encryption or not. Add a new argument to __e820__range_add to accept this new crypto_capable. Add a new argument to __e820__update_range to be able to change a region's crypto_capable member. Also, change its behavior a little, before if you wanted to update a region with its same type it was a BUG_ON; now if you call it with both old_type and new_type equals, then the function won't change the types, just crypto_capable. Change e820__update_table to handle merging and overlap problems taking into account crypto_capable. Add a function to mark a range as crypto, using __e820__range_update in the background. This will be called when initializing EFI. Signed-off-by: Martin Fernandez --- arch/x86/include/asm/e820/api.h | 1 + arch/x86/include/asm/e820/types.h | 1 + arch/x86/kernel/e820.c | 59 ++++++++++++++++++++++++------- 3 files changed, 49 insertions(+), 12 deletions(-) diff --git a/arch/x86/include/asm/e820/api.h b/arch/x86/include/asm/e820/api.h index e8f58ddd06d9..677dcbabcc8b 100644 --- a/arch/x86/include/asm/e820/api.h +++ b/arch/x86/include/asm/e820/api.h @@ -17,6 +17,7 @@ extern bool e820__mapped_all(u64 start, u64 end, enum e820_type type); extern void e820__range_add (u64 start, u64 size, enum e820_type type); extern u64 e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type); extern u64 e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type); +extern u64 e820__range_mark_as_crypto_capable(u64 start, u64 size); extern void e820__print_table(char *who); extern int e820__update_table(struct e820_table *table); diff --git a/arch/x86/include/asm/e820/types.h b/arch/x86/include/asm/e820/types.h index 314f75d886d0..7b510dffd3b9 100644 --- a/arch/x86/include/asm/e820/types.h +++ b/arch/x86/include/asm/e820/types.h @@ -56,6 +56,7 @@ struct e820_entry { u64 addr; u64 size; enum e820_type type; + u8 crypto_capable; } __attribute__((packed)); /* diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index bc0657f0deed..001d64686938 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -163,7 +163,7 @@ int e820__get_entry_type(u64 start, u64 end) /* * Add a memory region to the kernel E820 map. */ -static void __init __e820__range_add(struct e820_table *table, u64 start, u64 size, enum e820_type type) +static void __init __e820__range_add(struct e820_table *table, u64 start, u64 size, enum e820_type type, u8 crypto_capable) { int x = table->nr_entries; @@ -176,12 +176,13 @@ static void __init __e820__range_add(struct e820_table *table, u64 start, u64 si table->entries[x].addr = start; table->entries[x].size = size; table->entries[x].type = type; + table->entries[x].crypto_capable = crypto_capable; table->nr_entries++; } void __init e820__range_add(u64 start, u64 size, enum e820_type type) { - __e820__range_add(e820_table, start, size, type); + __e820__range_add(e820_table, start, size, type, 0); } static void __init e820_print_type(enum e820_type type) @@ -211,6 +212,8 @@ void __init e820__print_table(char *who) e820_table->entries[i].addr + e820_table->entries[i].size - 1); e820_print_type(e820_table->entries[i].type); + if (e820_table->entries[i].crypto_capable) + pr_cont("; crypto-capable"); pr_cont("\n"); } } @@ -327,6 +330,7 @@ int __init e820__update_table(struct e820_table *table) unsigned long long last_addr; u32 new_nr_entries, overlap_entries; u32 i, chg_idx, chg_nr; + u8 current_crypto, last_crypto; /* If there's only one memory region, don't bother: */ if (table->nr_entries < 2) @@ -367,6 +371,7 @@ int __init e820__update_table(struct e820_table *table) new_nr_entries = 0; /* Index for creating new map entries */ last_type = 0; /* Start with undefined memory type */ last_addr = 0; /* Start with 0 as last starting address */ + last_crypto = 0; /* Loop through change-points, determining effect on the new map: */ for (chg_idx = 0; chg_idx < chg_nr; chg_idx++) { @@ -388,13 +393,17 @@ int __init e820__update_table(struct e820_table *table) * 1=usable, 2,3,4,4+=unusable) */ current_type = 0; + current_crypto = 1; for (i = 0; i < overlap_entries; i++) { + current_crypto = current_crypto && overlap_list[i]->crypto_capable; if (overlap_list[i]->type > current_type) current_type = overlap_list[i]->type; } /* Continue building up new map based on this information: */ - if (current_type != last_type || e820_nomerge(current_type)) { + if (current_type != last_type || + current_crypto != last_crypto || + e820_nomerge(current_type)) { if (last_type != 0) { new_entries[new_nr_entries].size = change_point[chg_idx]->addr - last_addr; /* Move forward only if the new size was non-zero: */ @@ -406,9 +415,12 @@ int __init e820__update_table(struct e820_table *table) if (current_type != 0) { new_entries[new_nr_entries].addr = change_point[chg_idx]->addr; new_entries[new_nr_entries].type = current_type; + new_entries[new_nr_entries].crypto_capable = current_crypto; + last_addr = change_point[chg_idx]->addr; } last_type = current_type; + last_crypto = current_crypto; } } @@ -459,14 +471,20 @@ static int __init append_e820_table(struct boot_e820_entry *entries, u32 nr_entr return __append_e820_table(entries, nr_entries); } +/* + * Update a memory range. + * + * If old_type and new_type are the same then ignore the types and + * just change crypto_capable. + */ static u64 __init -__e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_type old_type, enum e820_type new_type) +__e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_type old_type, enum e820_type new_type, u8 crypto_capable) { u64 end; unsigned int i; u64 real_updated_size = 0; - BUG_ON(old_type == new_type); + bool update_crypto = new_type == old_type; if (size > (ULLONG_MAX - start)) size = ULLONG_MAX - start; @@ -476,6 +494,8 @@ __e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_ty e820_print_type(old_type); pr_cont(" ==> "); e820_print_type(new_type); + if (crypto_capable) + pr_cont("; crypto-capable"); pr_cont("\n"); for (i = 0; i < table->nr_entries; i++) { @@ -483,22 +503,27 @@ __e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_ty u64 final_start, final_end; u64 entry_end; - if (entry->type != old_type) + if (entry->type != old_type && !update_crypto) continue; + if (update_crypto) + new_type = entry->type; + entry_end = entry->addr + entry->size; /* Completely covered by new range? */ if (entry->addr >= start && entry_end <= end) { entry->type = new_type; + entry->crypto_capable = crypto_capable; real_updated_size += entry->size; continue; } /* New range is completely covered? */ if (entry->addr < start && entry_end > end) { - __e820__range_add(table, start, size, new_type); - __e820__range_add(table, end, entry_end - end, entry->type); + __e820__range_add(table, start, size, new_type, crypto_capable); + __e820__range_add(table, end, entry_end - end, + entry->type, entry->crypto_capable); entry->size = start - entry->addr; real_updated_size += size; continue; @@ -510,7 +535,8 @@ __e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_ty if (final_start >= final_end) continue; - __e820__range_add(table, final_start, final_end - final_start, new_type); + __e820__range_add(table, final_start, final_end - final_start, + new_type, crypto_capable); real_updated_size += final_end - final_start; @@ -527,14 +553,19 @@ __e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_ty return real_updated_size; } +u64 __init e820__range_mark_as_crypto_capable(u64 start, u64 size) +{ + return __e820__range_update(e820_table, start, size, 0, 0, true); +} + u64 __init e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type) { - return __e820__range_update(e820_table, start, size, old_type, new_type); + return __e820__range_update(e820_table, start, size, old_type, new_type, false); } static u64 __init e820__range_update_kexec(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type) { - return __e820__range_update(e820_table_kexec, start, size, old_type, new_type); + return __e820__range_update(e820_table_kexec, start, size, old_type, new_type, false); } /* Remove a range of memory from the E820 table: */ @@ -572,7 +603,9 @@ u64 __init e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool /* Is the new range completely covered? */ if (entry->addr < start && entry_end > end) { - e820__range_add(end, entry_end - end, entry->type); + __e820__range_add(e820_table, end, entry_end - end, + entry->type, entry->crypto_capable); + entry->size = start - entry->addr; real_removed_size += size; continue; @@ -1322,6 +1355,8 @@ void __init e820__memblock_setup(void) continue; memblock_add(entry->addr, entry->size); + if (entry->crypto_capable) + memblock_mark_crypto_capable(entry->addr, entry->size); } /* Throw away partial pages: */ From patchwork Thu Dec 16 19:22:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Fernandez X-Patchwork-Id: 12682403 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6FF4C433F5 for ; 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[190.16.153.7]) by smtp.gmail.com with ESMTPSA id j9sm3351985qkp.111.2021.12.16.11.23.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Dec 2021 11:23:34 -0800 (PST) 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, Martin Fernandez Subject: [PATCH v4 4/5] x86/efi: Tag e820_entries as crypto capable from EFI memmap Date: Thu, 16 Dec 2021 16:22:21 -0300 Message-Id: <20211216192222.127908-5-martin.fernandez@eclypsium.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211216192222.127908-1-martin.fernandez@eclypsium.com> References: <20211216192222.127908-1-martin.fernandez@eclypsium.com> MIME-Version: 1.0 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 6BBDB140011 X-Stat-Signature: i59qeeehcomqn1aex81e5ydsn15rw65z Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=eclypsium.com header.s=google header.b=NqdUyJ0f; dmarc=pass (policy=quarantine) header.from=eclypsium.com; spf=pass (imf09.hostedemail.com: domain of martin.fernandez@eclypsium.com designates 209.85.160.172 as permitted sender) smtp.mailfrom=martin.fernandez@eclypsium.com X-HE-Tag: 1639682612-616525 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add a function to iterate over the EFI Memory Map and mark the regions tagged with EFI_MEMORY_CPU_CRYPTO in the e820_table; and call it from efi_init if add_efi_memmap is disabled. Also modify do_add_efi_memmap to mark the regions there. Signed-off-by: Martin Fernandez --- arch/x86/platform/efi/efi.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 147c30a81f15..ce2f9d38fe36 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -184,6 +184,8 @@ static void __init do_add_efi_memmap(void) } e820__range_add(start, size, e820_type); + if (md->attribute & EFI_MEMORY_CPU_CRYPTO) + e820__range_mark_as_crypto_capable(start, size); } e820__update_table(e820_table); } @@ -441,6 +443,23 @@ static int __init efi_config_init(const efi_config_table_type_t *arch_tables) return ret; } +static void __init efi_mark_e820_regions_as_crypto_capable(void) +{ + efi_memory_desc_t *md; + + for_each_efi_memory_desc(md) { + if (md->attribute & EFI_MEMORY_CPU_CRYPTO) + e820__range_mark_as_crypto_capable(md->phys_addr, + md->num_pages << EFI_PAGE_SHIFT); + } + + /* + * We added and modified regions so it's good to update the + * table to merge/sort + */ + e820__update_table(e820_table); +} + void __init efi_init(void) { if (IS_ENABLED(CONFIG_X86_32) && @@ -494,6 +513,13 @@ void __init efi_init(void) set_bit(EFI_RUNTIME_SERVICES, &efi.flags); efi_clean_memmap(); + /* + * If add_efi_memmap then there is no need to mark the regions + * again + */ + if (!add_efi_memmap) + efi_mark_e820_regions_as_crypto_capable(); + if (efi_enabled(EFI_DBG)) efi_print_memmap(); } From patchwork Thu Dec 16 19:22:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Martin Fernandez X-Patchwork-Id: 12682419 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43FFBC433EF for ; Thu, 16 Dec 2021 19:25:40 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AE97E6B007E; Thu, 16 Dec 2021 14:24:00 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A98046B0080; Thu, 16 Dec 2021 14:24:00 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 961066B0081; Thu, 16 Dec 2021 14:24:00 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0182.hostedemail.com [216.40.44.182]) by kanga.kvack.org (Postfix) with ESMTP id 88BAC6B007E for ; Thu, 16 Dec 2021 14:24:00 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 344008907D for ; Thu, 16 Dec 2021 19:23:50 +0000 (UTC) X-FDA: 78924632220.15.E3B5450 Received: from mail-qk1-f169.google.com (mail-qk1-f169.google.com [209.85.222.169]) by imf17.hostedemail.com (Postfix) with ESMTP id A03E340005 for ; Thu, 16 Dec 2021 19:23:42 +0000 (UTC) Received: by mail-qk1-f169.google.com with SMTP id t83so24285987qke.8 for ; Thu, 16 Dec 2021 11:23:49 -0800 (PST) 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=AH5lWdN4aaOBeMJv18vhZagllhCdh1eRKSlcmjc8AEM=; b=cjK5uNREMFQogYWToQtq5d2khgn3l+ce6d3g5aREEMfU1ZmwxEw/1af6sNlR2wLzOz TUxWWdhhfiRbuozt+qIMTiJLYUf9z372ISx+k2osPtlkeESNRjfEoiiXLaPYZv85ru+w 8PIve9b0BjG5Xe3jTS0TFmvG2NSackUAlmKal9V8BiyKbCPV8vxpGXIN49CPiqCSlkpS UHZvB62wPguNqonI45MQH0UobDOlB7qDsmwDPWJY4JX53bRXA0Qba6SBInDdtLbI/RbF aa85KLS239ucyWjsEfTofovAasO/4v7SVC5HigIe0LuGUbbtRMOCHXErYGHB9fnRIAE7 EyHg== 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=AH5lWdN4aaOBeMJv18vhZagllhCdh1eRKSlcmjc8AEM=; b=7jR3anHOqDBJy3y6kcQY3CY4o3iHNZpFXInDtb0473Ye3a4DSpxt71EcZGyDdDtF+v tf8l57yw5jW7totQ7AjyxgsAdklP83KgNkwT4INSuZ5A0+04TGfL1r1RbqtggkBiHOdG bLVgdz/Yi0RvW/vcuDvG6tz0dqMvbXaMqg6BjYaWoDULMlKy1hxzpxyA/NkZ0qsbN40a cCabyu3ty5lncrP0JR+t4C16g1hg2DQMpoBeKkqWRq3/zJ/Jut0uJCfRGc0id/zb4L5/ aJQEoEOdrGcM3Xa3UlKjBICSuuzzgXBqSV7oeFw68R3mWph/ovu+nb2nPJ/gz0SbymqM 6LEg== X-Gm-Message-State: AOAM533Uyzk8aNEcKYkGZQb+nfFwBZoHfLjLD60Fy6UfxHOoXuoix1Gj II9pEijM6GwBl8wBiMsdrQekxw== X-Google-Smtp-Source: ABdhPJwERimh+QTigiLtfVxRjB1Ls3j6fyYxSp/4R1hD2IL5zeGaIumUANrS2pIGVkdIPc/04oqx+w== X-Received: by 2002:a05:620a:24ca:: with SMTP id m10mr13172979qkn.649.1639682629056; Thu, 16 Dec 2021 11:23:49 -0800 (PST) Received: from localhost (7-153-16-190.fibertel.com.ar. [190.16.153.7]) by smtp.gmail.com with ESMTPSA id o4sm3258510qkh.107.2021.12.16.11.23.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Dec 2021 11:23:48 -0800 (PST) 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, Martin Fernandez Subject: [PATCH v4 5/5] drivers/node: Show in sysfs node's crypto capabilities Date: Thu, 16 Dec 2021 16:22:22 -0300 Message-Id: <20211216192222.127908-6-martin.fernandez@eclypsium.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211216192222.127908-1-martin.fernandez@eclypsium.com> References: <20211216192222.127908-1-martin.fernandez@eclypsium.com> MIME-Version: 1.0 Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=eclypsium.com header.s=google header.b=cjK5uNRE; spf=pass (imf17.hostedemail.com: domain of martin.fernandez@eclypsium.com designates 209.85.222.169 as permitted sender) smtp.mailfrom=martin.fernandez@eclypsium.com; dmarc=pass (policy=quarantine) header.from=eclypsium.com X-Rspamd-Queue-Id: A03E340005 X-Stat-Signature: uhf3dkfh8n4sx6y3kipxdhnckyystrcc X-Rspamd-Server: rspam04 X-HE-Tag: 1639682622-989600 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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..93581b31225e --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-node @@ -0,0 +1,10 @@ +What: /sys/devices/system/node/nodeX/crypto_capable +Date: December 2021 +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 b5a4ba18f9f9..67b0e2fa93b1 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 };