From patchwork Sun Nov 19 16:57:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 13460601 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C33A0C54E76 for ; Sun, 19 Nov 2023 16:59:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Q7fnU2hZwjOEkUkeOjc7WKM45BAXu5Qci5DUy6kh0ig=; b=enoGtW9YKYAdtY Z4mOmHyHGeJpXxvbJtPTUOjaCy5irXy4G4IilMuwQKi5lM4kEocyXnVySVIZynL7m5p9BJhcHZ6if 1BIbuBZR/WWsse8ag4ha3w2Y9pN+8LAbapLJm1DHk1anvaWcNC4JwddQxKuBlQ8XpLiIo8f5sRwaz tnK7e42OMFNBJly7cMTuGLvCdYcjN1fMc9MG5CLp9sYlVDm2K3gJK7HWImLJ+Qs78a523M++wm8j7 d+1c8bQIs+Ga63QOnCTkO8VcSlT7XvZhkB6rI1nsNGWAY+2ryUvNHRDMJn/bO5Z5tvI4gHSKXR/dC 7GsyiikzhSMSF2F86exg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r4l8U-00ARHC-22; Sun, 19 Nov 2023 16:59:06 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r4l8N-00ARAr-0p for linux-arm-kernel@lists.infradead.org; Sun, 19 Nov 2023 16:59:02 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D2E19FEC; Sun, 19 Nov 2023 08:59:44 -0800 (PST) Received: from e121798.cable.virginm.net (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9966B3F6C4; Sun, 19 Nov 2023 08:58:53 -0800 (PST) From: Alexandru Elisei To: catalin.marinas@arm.com, will@kernel.org, oliver.upton@linux.dev, maz@kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, arnd@arndb.de, akpm@linux-foundation.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, mhiramat@kernel.org, rppt@kernel.org, hughd@google.com Cc: pcc@google.com, steven.price@arm.com, anshuman.khandual@arm.com, vincenzo.frascino@arm.com, david@redhat.com, eugenis@google.com, kcc@google.com, hyesoo.yu@samsung.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: [PATCH RFC v2 15/27] arm64: mte: Check that tag storage blocks are in the same zone Date: Sun, 19 Nov 2023 16:57:09 +0000 Message-Id: <20231119165721.9849-16-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231119165721.9849-1-alexandru.elisei@arm.com> References: <20231119165721.9849-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231119_085859_477698_B2552F8E X-CRM114-Status: GOOD ( 12.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org alloc_contig_range() requires that the requested pages are in the same zone. Check that this is indeed the case before initializing the tag storage blocks. Signed-off-by: Alexandru Elisei --- arch/arm64/kernel/mte_tag_storage.c | 33 +++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/arch/arm64/kernel/mte_tag_storage.c b/arch/arm64/kernel/mte_tag_storage.c index 8b9bedf7575d..fd63430d4dc0 100644 --- a/arch/arm64/kernel/mte_tag_storage.c +++ b/arch/arm64/kernel/mte_tag_storage.c @@ -265,6 +265,35 @@ void __init mte_tag_storage_init(void) } } +/* alloc_contig_range() requires all pages to be in the same zone. */ +static int __init mte_tag_storage_check_zone(void) +{ + struct range *tag_range; + struct zone *zone; + unsigned long pfn; + u32 block_size; + int i, j; + + for (i = 0; i < num_tag_regions; i++) { + block_size = tag_regions[i].block_size; + if (block_size == 1) + continue; + + tag_range = &tag_regions[i].tag_range; + for (pfn = tag_range->start; pfn <= tag_range->end; pfn += block_size) { + zone = page_zone(pfn_to_page(pfn)); + for (j = 1; j < block_size; j++) { + if (page_zone(pfn_to_page(pfn + j)) != zone) { + pr_err("Tag storage block pages in different zones"); + return -EINVAL; + } + } + } + } + + return 0; +} + static int __init mte_tag_storage_activate_regions(void) { phys_addr_t dram_start, dram_end; @@ -321,6 +350,10 @@ static int __init mte_tag_storage_activate_regions(void) goto out_disabled; } + ret = mte_tag_storage_check_zone(); + if (ret) + goto out_disabled; + for (i = 0; i < num_tag_regions; i++) { tag_range = &tag_regions[i].tag_range; for (pfn = tag_range->start; pfn <= tag_range->end; pfn += pageblock_nr_pages)