From nobody Sat Oct 4 22:35:28 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 13250275846 for ; Tue, 12 Aug 2025 12:50:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755003061; cv=none; b=gbZZnpE/D0p/axmXhTIDz2JJ8RYv2tJcFvmwhvmGWnglV0RyIXuWFVCTM/Vf6TedxD4f/9D3rxkVU6DFbSxm+OGNuBNFrewOIfutl4OAGSBwa4u9SDMgZsn7gT+mntJQbKc4y+gvNF0S6eEUy5U+bHmU733FMUOR2V2Ks3biQEA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755003061; c=relaxed/simple; bh=/G5jYkyo+hP74iXawuBhorBrIE3sZvr6FUbDljXw8wM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=suDQYukrvxl0HObIZ+/XGK6QF/wrtqfwuP1bqcnpIPYo7+c9BJFtnIaZaOxw7+2fG2ofLC1YWPkl9nA9d55evwmmuIP6KoLr0ZYCDh2Qh4LaJek6ybdBZiNLtm3AykM8hdeH6bBNMUcsSvTgZ3BMl1m4lIFg7WyBxLQdT0GmYtg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=PWJprqUm; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="PWJprqUm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755003059; 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=KrTt3YvXHtYUuoIddMbmkc8QXtgLzrL59sgxurx8fJw=; b=PWJprqUmDyKEFA3o7i4zBF4m3DyuZZuwhHW22GQsMxt26ULwI5d52t9Hv4LbEUnAN+NnGE VtDmVnD2scoWw5CxxVIJBDHCpjEwNz5UtceAPGRG7W2CKJYe/YMz+XwII6tcnUdX5Nogp/ m+tlzIFOXijBtxeb5v4wPxdtdCOYE0c= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-9-IghP0uCBOV-OwVmnG3ieZQ-1; Tue, 12 Aug 2025 08:50:53 -0400 X-MC-Unique: IghP0uCBOV-OwVmnG3ieZQ-1 X-Mimecast-MFC-AGG-ID: IghP0uCBOV-OwVmnG3ieZQ_1755003052 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-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E143219560A2; Tue, 12 Aug 2025 12:50:51 +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 4F13630001A1; Tue, 12 Aug 2025 12:50:44 +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 08/12] arch/riscv: don't initialize kasan if it's disabled Date: Tue, 12 Aug 2025 20:49:37 +0800 Message-ID: <20250812124941.69508-9-bhe@redhat.com> In-Reply-To: <20250812124941.69508-1-bhe@redhat.com> References: <20250812124941.69508-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Content-Type: text/plain; charset="utf-8" And also add code to enable kasan_flag_enabled, this is for later usage. Signed-off-by: Baoquan He --- arch/riscv/mm/kasan_init.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index 41c635d6aca4..ac3ac227c765 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -485,6 +485,9 @@ void __init kasan_init(void) phys_addr_t p_start, p_end; u64 i; =20 + if (kasan_arg_disabled) + return; + create_tmp_mapping(); csr_write(CSR_SATP, PFN_DOWN(__pa(tmp_pg_dir)) | satp_mode); =20 @@ -531,6 +534,9 @@ void __init kasan_init(void) memset(kasan_early_shadow_page, KASAN_SHADOW_INIT, PAGE_SIZE); init_task.kasan_depth =3D 0; =20 + /* KASAN is now initialized, enable it. */ + static_branch_enable(&kasan_flag_enabled); + csr_write(CSR_SATP, PFN_DOWN(__pa(swapper_pg_dir)) | satp_mode); local_flush_tlb_all(); } --=20 2.41.0