From patchwork Wed Sep 29 14:36:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 12525687 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 249C4C433FE for ; Wed, 29 Sep 2021 14:37:41 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B9AA6613CD for ; Wed, 29 Sep 2021 14:37:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B9AA6613CD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 60565940033; Wed, 29 Sep 2021 10:37:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 58D62940020; Wed, 29 Sep 2021 10:37:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 42EC5940033; Wed, 29 Sep 2021 10:37:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0038.hostedemail.com [216.40.44.38]) by kanga.kvack.org (Postfix) with ESMTP id 2E91A940020 for ; Wed, 29 Sep 2021 10:37:40 -0400 (EDT) Received: from smtpin36.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id D898B183A1EF9 for ; Wed, 29 Sep 2021 14:37:39 +0000 (UTC) X-FDA: 78640864638.36.607214D Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf13.hostedemail.com (Postfix) with ESMTP id 8A5A31036A0D for ; Wed, 29 Sep 2021 14:37:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1632926259; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zxKKmmMRHJSYhaR7u+5ryK3qo040LzhTNWQ2wFcbJqY=; b=UW85NGLzcZatU8JyhiSIOv9r9vGFi9UQ85V9cdvZr0hSj8r1eNh74lwKwxMCv+u1nI4z0E FeI4bH/jgBvdN71mG7tMVC0cQLSzHu2fHpxmYb7RXsC6OiU7/BdI05fze2sv+pRgMuf802 dwjbGBEmYqGugowh+9dQsfTkgIrcWr0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-39-8UlB_jwgMrCaCz7PRId56w-1; Wed, 29 Sep 2021 10:37:37 -0400 X-MC-Unique: 8UlB_jwgMrCaCz7PRId56w-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 897568015C7; Wed, 29 Sep 2021 14:37:34 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.195.135]) by smtp.corp.redhat.com (Postfix) with ESMTP id 745251017E27; Wed, 29 Sep 2021 14:37:28 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: David Hildenbrand , Andrew Morton , Jonathan Corbet , Alex Shi , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Greg Kroah-Hartman , "Rafael J. Wysocki" , "Michael S. Tsirkin" , Jason Wang , Shuah Khan , Michal Hocko , Oscar Salvador , Mike Rapoport , x86@kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, virtualization@lists.linux-foundation.org Subject: [PATCH v1 6/6] x86: remove memory hotplug support on X86_32 Date: Wed, 29 Sep 2021 16:36:00 +0200 Message-Id: <20210929143600.49379-7-david@redhat.com> In-Reply-To: <20210929143600.49379-1-david@redhat.com> References: <20210929143600.49379-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=UW85NGLz; spf=none (imf13.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.129.124) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 8A5A31036A0D X-Stat-Signature: 56bxmrxozbxbo885fwn83qiniqpw8i4q X-HE-Tag: 1632926259-977857 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: CONFIG_MEMORY_HOTPLUG was marked BROKEN over one year and we just restricted it to 64 bit. Let's remove the unused x86 32bit implementation and simplify the Kconfig. Signed-off-by: David Hildenbrand Reviewed-by: Oscar Salvador --- arch/x86/Kconfig | 6 +++--- arch/x86/mm/init_32.c | 31 ------------------------------- 2 files changed, 3 insertions(+), 34 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index ab83c22d274e..85f4762429f1 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -62,7 +62,7 @@ config X86 select ARCH_32BIT_OFF_T if X86_32 select ARCH_CLOCKSOURCE_INIT select ARCH_ENABLE_HUGEPAGE_MIGRATION if X86_64 && HUGETLB_PAGE && MIGRATION - select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64 || (X86_32 && HIGHMEM) + select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64 select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE) select ARCH_ENABLE_THP_MIGRATION if X86_64 && TRANSPARENT_HUGEPAGE @@ -1615,7 +1615,7 @@ config ARCH_SELECT_MEMORY_MODEL config ARCH_MEMORY_PROBE bool "Enable sysfs memory/probe interface" - depends on X86_64 && MEMORY_HOTPLUG + depends on MEMORY_HOTPLUG help This option enables a sysfs memory/probe interface for testing. See Documentation/admin-guide/mm/memory-hotplug.rst for more information. @@ -2395,7 +2395,7 @@ endmenu config ARCH_HAS_ADD_PAGES def_bool y - depends on X86_64 && ARCH_ENABLE_MEMORY_HOTPLUG + depends on ARCH_ENABLE_MEMORY_HOTPLUG config ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE def_bool y diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index bd90b8fe81e4..5cd7ea6d645c 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -779,37 +779,6 @@ void __init mem_init(void) test_wp_bit(); } -#ifdef CONFIG_MEMORY_HOTPLUG -int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_params *params) -{ - unsigned long start_pfn = start >> PAGE_SHIFT; - unsigned long nr_pages = size >> PAGE_SHIFT; - int ret; - - /* - * The page tables were already mapped at boot so if the caller - * requests a different mapping type then we must change all the - * pages with __set_memory_prot(). - */ - if (params->pgprot.pgprot != PAGE_KERNEL.pgprot) { - ret = __set_memory_prot(start, nr_pages, params->pgprot); - if (ret) - return ret; - } - - return __add_pages(nid, start_pfn, nr_pages, params); -} - -void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap) -{ - unsigned long start_pfn = start >> PAGE_SHIFT; - unsigned long nr_pages = size >> PAGE_SHIFT; - - __remove_pages(start_pfn, nr_pages, altmap); -} -#endif - int kernel_set_to_readonly __read_mostly; static void mark_nxdata_nx(void)