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 2598FD3E787 for ; Sun, 14 Dec 2025 11:23:17 +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: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=EtJ6ddkQ2S6P1Qk0wc65RhIQVbjp57M+c+d4813hjd4=; b=edNmCQzjBJxAb25SKp0s+Ssw6q oEfXMWnzVuMUxWsOPWfdBkA1Aa9msa6YNfkaqvLm5fW+tFSlIbsS9YZov5BcJeZXN5nssbczrQTgE wPP9ULjzfIzPuDE8b75yfSnFC43W0MiZ2ZdniKpZQGpjl7mZXOnAAHcwGHZnJhDXDyPDRIdlXv5hZ blFTuj8x1Sus7RX27oxNh9DVh5ANdNhEmORKdjsD0CQ8iawmXLWdZzg9zA+N2BDz6o4W6RQvbTv8f CY93wwPmEKidonZoJMDrBe1Wjr0t+EA5zA4xhpa1J+IofOBDH+PPOTkg5vqZI6AR7jJfOHK4r0FeN qmauWeoA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vUkC0-00000002Ow9-3M4l; Sun, 14 Dec 2025 11:23:12 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vUkBy-00000002OuT-2mNo for linux-arm-kernel@lists.infradead.org; Sun, 14 Dec 2025 11:23:11 +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 616541063; Sun, 14 Dec 2025 03:23:02 -0800 (PST) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 408853F73B; Sun, 14 Dec 2025 03:23:06 -0800 (PST) From: Yeoreum Yun To: catalin.marinas@arm.com, will@kernel.org, maz@kernel.org, broonie@kernel.org, oliver.upton@linux.dev, miko.lenczewski@arm.com, kevin.brodsky@arm.com, ardb@kernel.org, suzuki.poulose@arm.com, lpieralisi@kernel.org, yangyicong@hisilicon.com, scott@os.amperecomputing.com, joey.gouly@arm.com, yuzenghui@huawei.com, pbonzini@redhat.com, shuah@kernel.org, mark.rutland@arm.com, arnd@arndb.de Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, Yeoreum Yun Subject: [PATCH v11 RESEND 4/9] arm64: Kconfig: Detect toolchain support for LSUI Date: Sun, 14 Dec 2025 11:22:43 +0000 Message-Id: <20251214112248.901769-5-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251214112248.901769-1-yeoreum.yun@arm.com> References: <20251214112248.901769-1-yeoreum.yun@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251214_032310_772759_BB6C9426 X-CRM114-Status: UNSURE ( 6.80 ) X-CRM114-Notice: Please train this message. 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 Since Armv9.6, FEAT_LSUI supplies the load/store instructions for previleged level to access to access user memory without clearing PSTATE.PAN bit. It's enough to add CONFIG_AS_HAS_LSUI only because the code for LSUI uses individual `.arch_extension` entries. Signed-off-by: Yeoreum Yun Reviewed-by: Catalin Marinas --- arch/arm64/Kconfig | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 93173f0a09c7..36e87a1a1b5c 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -2227,6 +2227,11 @@ config ARM64_GCS endmenu # "ARMv9.4 architectural features" +config AS_HAS_LSUI + def_bool $(as-instr,.arch_extension lsui) + help + Supported by LLVM 20+ and binutils 2.45+. + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y -- LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}