From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f175.google.com (mail-qt1-f175.google.com [209.85.160.175]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E80DA66E8 for ; Tue, 13 Sep 2022 19:58:39 +0000 (UTC) Received: by mail-qt1-f175.google.com with SMTP id b23so4696721qtr.13 for ; Tue, 13 Sep 2022 12:58:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=5WWAAzNcGRX09yf3QcgLeiV4ytIgw0QIAz2zMov/ZDY=; b=Yz1mtV6YiuvArbfHbQBXNKT9eLELbvn7bnniGDLD1BumkiBsr2ZDlVa36+Wy8wKT5o ryYhGAJx49vUh11TKsorymepYWGSO76xJbhP0rWVGH3ntJ/cZBgl0HG4OoxTwsRCKi5P r8fZHkmi9dhCwHqvtScDgQwe7gg6nWmJBlbT6hYOH0ew7iRaIAjSwvoSk6SKm+tRfQu+ rKZsLcxmkz1cCAli2W9VyR6gyYWGuJOVoZMSgPsY0YmHve5v7DOrmmIyu3LMUZg6pUfw lIU/zKc3QMqDUaQMXnCFOtpC/YhN4nYgSjeSX0Y2GgcVNB6wvWWTn+zhjMxvZzDNv7zs 69cQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=5WWAAzNcGRX09yf3QcgLeiV4ytIgw0QIAz2zMov/ZDY=; b=t1Nd/vHdIuYSNm+ibKbxYdEq8dAKNa88Vzp/Nbw3XEmxnsxuNdoX7mfKfCLYd++i11 /sgXqlsnZNjQoorP7t+1bYoQzNUNBziWE1wxLmDMrb17ryL7NEVISz7eITYjH8jVd1cl sQthUx+1xgwxvGEcBnyDf8YuTrzlQZSuYpZX3YpukGwkvmtpr50nl0ALFO1Iocuh9sRE on+Uw/4vqKdtp85vp5BtnZGU95b+l86Ja1HMQHJetb+37DNA++dSLyUVs8qwzNN0mR5t T1V6WifKweodq5gsktqS6ifq2pSft+fXYFlT3dK7rJYzTYKhAaaBeTEKlsUIBtT5DEGp 2Z6w== X-Gm-Message-State: ACgBeo2XGJas5S5yi9j6uyA870m4eNSoXz4RnOLzqoqgZxVOKC9atyVc goH38kMKB+dYDc/Q6Mhj/Ek= X-Google-Smtp-Source: AA6agR6JFHHtW1Pd7kJf3d4lhxO33YWLvSfzGCmyAGQLZ1dEkgSuVHnr1X0agG5L8d/cKj0D7xYuZA== X-Received: by 2002:a05:622a:1998:b0:343:6452:dbd9 with SMTP id u24-20020a05622a199800b003436452dbd9mr30254647qtc.423.1663099118855; Tue, 13 Sep 2022 12:58:38 -0700 (PDT) Received: from stbirv-lnx-3.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id s11-20020a05620a29cb00b006b8e049cf08sm276305qkp.2.2022.09.13.12.58.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Sep 2022 12:58:38 -0700 (PDT) From: Doug Berger To: Andrew Morton Cc: Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Frank Rowand , Mike Kravetz , Muchun Song , Mike Rapoport , Christoph Hellwig , Marek Szyprowski , Robin Murphy , Borislav Petkov , "Paul E. McKenney" , Neeraj Upadhyay , Randy Dunlap , Damien Le Moal , Doug Berger , Florian Fainelli , David Hildenbrand , Zi Yan , Oscar Salvador , Hari Bathini , Kees Cook , - , KOSAKI Motohiro , Mel Gorman , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev Subject: [PATCH 12/21] memblock: introduce MEMBLOCK_MOVABLE flag Date: Tue, 13 Sep 2022 12:54:59 -0700 Message-Id: <20220913195508.3511038-13-opendmb@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220913195508.3511038-1-opendmb@gmail.com> References: <20220913195508.3511038-1-opendmb@gmail.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The MEMBLOCK_MOVABLE flag is introduced to designate a memblock as only supporting movable allocations by the page allocator. Signed-off-by: Doug Berger --- include/linux/memblock.h | 8 ++++++++ mm/memblock.c | 24 ++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 50ad19662a32..8eb3ca32dfa7 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -47,6 +47,7 @@ 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_MOVABLE = 0x10, /* designated movable block */ }; /** @@ -125,6 +126,8 @@ int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); int memblock_mark_nomap(phys_addr_t base, phys_addr_t size); int memblock_clear_nomap(phys_addr_t base, phys_addr_t size); +int memblock_mark_movable(phys_addr_t base, phys_addr_t size); +int memblock_clear_movable(phys_addr_t base, phys_addr_t size); void memblock_free_all(void); void memblock_free(void *ptr, size_t size); @@ -265,6 +268,11 @@ static inline bool memblock_is_driver_managed(struct memblock_region *m) return m->flags & MEMBLOCK_DRIVER_MANAGED; } +static inline bool memblock_is_movable(struct memblock_region *m) +{ + return m->flags & MEMBLOCK_MOVABLE; +} + int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, unsigned long *end_pfn); void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, diff --git a/mm/memblock.c b/mm/memblock.c index b5d3026979fc..5d6a210d98ec 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -979,6 +979,30 @@ int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); } +/** + * memblock_mark_movable - Mark designated movable block with MEMBLOCK_MOVABLE. + * @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_movable(phys_addr_t base, phys_addr_t size) +{ + return memblock_setclr_flag(base, size, 1, MEMBLOCK_MOVABLE); +} + +/** + * memblock_clear_movable - Clear flag MEMBLOCK_MOVABLE 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_movable(phys_addr_t base, phys_addr_t size) +{ + return memblock_setclr_flag(base, size, 0, MEMBLOCK_MOVABLE); +} + static bool should_skip_region(struct memblock_type *type, struct memblock_region *m, int nid, int flags) -- 2.25.1