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 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 DABB0CA0EE1 for ; Tue, 12 Aug 2025 17:31:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-type: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=QN1Z1dUeks4QygHE7wKCYxkrDkPOGTvp8PG+uI+E7oo=; b=ex/xjySg5MADmnoTmx8aG6P/mL AJfCC963Hk8PGfWrkDXhtpI/qe3ZozReASfl/utvoaOJ0hSF1HuR0i0NWBV1wmR1nsuq9m7HOeLTC bP0JS5DgnKhK8oKFU3nVE7XOdmKCmdvUabXo/cb/Oyl0bOg+Q1mOhQ+eckrVsDrlS88rCf1BzKqtH vVl80JNGnKyyvQDbmzXWUp/ydrksbzH+YI/Nh8gdiuWc8ITssPt0hS19jmsOQDVq6VOLhBCgV8Dbl Hx6Yi5kvTVuiEb/19wdAsOSknOAeadpFiWJlMvMOE823l3bPaRMV+fIARUg7T5EgmE/P4qFKi2/Ni 7CQhFpiQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ulsqB-0000000BZXi-0dFH; Tue, 12 Aug 2025 17:31:15 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uloU4-0000000AqE9-1yCY for kexec@lists.infradead.org; Tue, 12 Aug 2025 12:52:09 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755003127; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QN1Z1dUeks4QygHE7wKCYxkrDkPOGTvp8PG+uI+E7oo=; b=ZpqJIZrbp6bPj3zMqrGKnGEgbM77yB1Sjtlul0hRcv/LpodHSgVxdF4p+S6Dx3jjjtRcMd 54P8jtQAdHb7l0fkYnLDVfSKEHNXN+iEFzY28UB3SsgU1TH/GEKC4Tj6WWG/v8b4qf2zuT WftuAxDiPcRTV1UyBwXafBQ3G1cgSZk= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-620-at2M-5U8MMOmrD3AvQwZ7Q-1; Tue, 12 Aug 2025 08:50:40 -0400 X-MC-Unique: at2M-5U8MMOmrD3AvQwZ7Q-1 X-Mimecast-MFC-AGG-ID: at2M-5U8MMOmrD3AvQwZ7Q_1755003038 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4CC9C1800773; Tue, 12 Aug 2025 12:50:37 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.156]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id C2C97300145B; Tue, 12 Aug 2025 12:50:30 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, sj@kernel.org, lorenzo.stoakes@oracle.com, elver@google.com, snovitoll@gmail.com, Baoquan He Subject: [PATCH v2 06/12] arch/loongarch: don't initialize kasan if it's disabled Date: Tue, 12 Aug 2025 20:49:35 +0800 Message-ID: <20250812124941.69508-7-bhe@redhat.com> In-Reply-To: <20250812124941.69508-1-bhe@redhat.com> References: <20250812124941.69508-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250812_055208_627574_16F02AC3 X-CRM114-Status: GOOD ( 10.01 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org And also add code to enable kasan_flag_enabled, this is for later usage. Signed-off-by: Baoquan He --- arch/loongarch/mm/kasan_init.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c index d2681272d8f0..0c32eee6910f 100644 --- a/arch/loongarch/mm/kasan_init.c +++ b/arch/loongarch/mm/kasan_init.c @@ -267,6 +267,8 @@ void __init kasan_init(void) u64 i; phys_addr_t pa_start, pa_end; + if (kasan_arg_disabled) + return; /* * If PGDIR_SIZE is too large for cpu_vabits, KASAN_SHADOW_END will * overflow UINTPTR_MAX and then looks like a user space address. @@ -327,6 +329,9 @@ void __init kasan_init(void) csr_write64(__pa_symbol(swapper_pg_dir), LOONGARCH_CSR_PGDH); local_flush_tlb_all(); + /* KASAN is now initialized, enable it. */ + static_branch_enable(&kasan_flag_enabled); + /* At this point kasan is fully initialized. Enable error messages */ init_task.kasan_depth = 0; pr_info("KernelAddressSanitizer initialized.\n"); -- 2.41.0