From nobody Fri Dec 19 00:52:22 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30094C00A8F for ; Mon, 23 Oct 2023 14:44:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233749AbjJWOoJ (ORCPT ); Mon, 23 Oct 2023 10:44:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233807AbjJWOnq (ORCPT ); Mon, 23 Oct 2023 10:43:46 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C7CA1FD3 for ; Mon, 23 Oct 2023 07:42:28 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 9011B2188F; Mon, 23 Oct 2023 14:42:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1698072146; h=from:from:reply-to: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=ptLMqv6iaACOOpI3/GceNmmJmtBYsEsFiVZhrERtJcU=; b=HpFvhsGRqrkWuoKHGLQpCHaNEeX0hCZU8Ns5O630i2hGaSX8F5c1wRpCrav8t6nLksfcoJ 6UwowYxJJBXRuTNz7bgCFJuvAzm8bfwtOP5kEueXj2qutCxLwiu8lLt+JXWoyQv5JNT7nd +UVGsPwwPFbHAXjdujBBcGqmrw6XfvY= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 73BD2139C2; Mon, 23 Oct 2023 14:42:26 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id WPj+GVKGNmXBdgAAMHmgww (envelope-from ); Mon, 23 Oct 2023 14:42:26 +0000 From: Andrea della Porta To: Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: nik.borisov@suse.com, arnd@arndb.de, mark.rutland@arm.com, Andrea della Porta Subject: [PATCH v2 2/4] arm64/process: Make loading of 32bit processes depend on aarch32_enabled() Date: Mon, 23 Oct 2023 16:42:21 +0200 Message-ID: <2d105c9d8184686fe5aadf646bea7f46ec68ff8b.1698069331.git.andrea.porta@suse.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: smtp-out1.suse.de; none X-Spamd-Result: default: False [-2.70 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_MISSING_CHARSET(2.50)[]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; REPLY(-4.00)[]; NEURAL_HAM_LONG(-3.00)[-1.000]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCPT_COUNT_SEVEN(0.00)[8]; MID_CONTAINS_FROM(1.00)[]; FORGED_SENDER(0.30)[andrea.porta@suse.com,aporta@suse.de]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; FROM_NEQ_ENVFROM(0.10)[andrea.porta@suse.com,aporta@suse.de]; RCVD_TLS_ALL(0.00)[] Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Major aspect of Aarch32 support is the ability to load 32bit processes. That's currently decided (among others) by compat_elf_check_arch() and system_supports_32bit_el0(). Make the macro use aarch32_enabled() to decide if Aarch32 compat is enabled before loading a 32bit process. Signed-off-by: Andrea della Porta --- arch/arm64/include/asm/cpufeature.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/c= pufeature.h index 1180d68daaff..778f2f3b2c7d 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -679,8 +679,9 @@ static inline bool system_supports_32bit_el0(void) { u64 pfr0 =3D read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1); =20 - return static_branch_unlikely(&arm64_mismatched_32bit_el0) || - id_aa64pfr0_32bit_el0(pfr0); + return (static_branch_unlikely(&arm64_mismatched_32bit_el0) || + id_aa64pfr0_32bit_el0(pfr0)) && + aarch32_enabled(); } =20 static inline bool system_supports_4kb_granule(void) --=20 2.35.3