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 DE2A9C53200 for ; Wed, 29 Jul 2026 12:26:50 +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=+/GKX3IjH5uKDq/8w06PcQUyEeksBuMAx7kcby96yrI=; b=yJmihXMWu/2mq8fqzxyhxtsxK4 n4RFVlcl3G45t6OiyPVeUyBzFQquR80wjKkR4EUaotW4dk9iqfhcTdf6Wn/M6AwI7l3sR/MkhjPMD ZHJSNmBbqiNqKEBcrTzZyjx4xcYaFlv8P485nOtD9I7vMjX02W5wkW5rOrC9Krr6ky1KTdCld/rxu 60YCskGDAOQ9pLn6x7eVVgQ3jSDu41ChJycb+mmKVH3xf99yxtxy9xADzShXJM/0Fv9QsBVzu8ooA g1tgiU1QdqvFpgGm56ZYpJkkD84mxIbfv+4cD3riNDZqYjFRHABop7iPX4ubYQfJ5S7Wxvgtw/Sqc sTQT86ZA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wp3Mp-00000007u6X-0l0K; Wed, 29 Jul 2026 12:26:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wp3Mb-00000007ttD-0mK8 for linux-arm-kernel@lists.infradead.org; Wed, 29 Jul 2026 12:26:22 +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 83E05168F; Wed, 29 Jul 2026 05:26:15 -0700 (PDT) Received: from a085714.blr.arm.com (a085714.arm.com [10.164.19.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0B5153FA1F; Wed, 29 Jul 2026 05:26:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1785327979; bh=M2ps/0zfUAQBr8mTpjkLtUW0+CfbGBqydB+0Or/9/Lg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s67r0/xD72kclPDh9SmJEMUoTLUiZAEmItMV562/z0Xu6NVG5VAPo/wXYLoVJga2o k7OoO5MI3U2AaN4WbbcMkqk/uBph/b4pkZOms7lF02ZRkW/M3cdJ0N/kjt6ej3Sz21 TAQqFCE6T6YgK7P17Zf0WP8D7nHkPyHeqn3zxT5w= From: Anshuman Khandual To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org Cc: Anshuman Khandual , Catalin Marinas , Will Deacon , Ryan Roberts , Mark Rutland , Lorenzo Stoakes , Andrew Morton , David Hildenbrand , Mike Rapoport , Linu Cherian , linux-kernel@vger.kernel.org Subject: [PATCH 17/17] arm64/mm: Make ARM64_D128 selectable Date: Wed, 29 Jul 2026 17:54:52 +0530 Message-ID: <20260729122452.3797443-18-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260729122452.3797443-1-anshuman.khandual@arm.com> References: <20260729122452.3797443-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260729_052621_270016_F3B4985E X-CRM114-Status: GOOD ( 11.81 ) 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 All required changes are already in place including the TLBIP instruction support for enabling D128 translation. Just make this new ARM64_D128 user selectable, after ensuring necessary tools chain support required for the new instructions being used for D128. Cc: Catalin Marinas Cc: Will Deacon Cc: Ryan Roberts Cc: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/arm64/Kconfig | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 8459d43afd45..6c88906d48ec 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -275,6 +275,10 @@ config GCC_SUPPORTS_DYNAMIC_FTRACE_WITH_ARGS def_bool CC_IS_GCC depends on $(cc-option,-fpatchable-function-entry=2) +config CC_SUPPORTS_LSE128 + def_bool CC_IS_GCC + depends on $(cc-option, -march=armv8.1-a+lse128) + config 64BIT def_bool y @@ -2249,8 +2253,18 @@ endmenu # "ARMv8.9 architectural features" menu "ARMv9.3 architectural features" +config AS_HAS_ARMV9_3 + def_bool $(cc-option,-Wa$(comma)-march=armv9.3-a) + config ARM64_D128 - bool + bool "Enable support for 128 bit page table (FEAT_D128)" + depends on ARCH_SUPPORTS_INT128 + depends on CC_SUPPORTS_LSE128 + depends on AS_HAS_ARMV9_3 + depends on EXPERT + depends on !VIRTUALIZATION + depends on !KASAN + depends on !UNMAP_KERNEL_AT_EL0 default n help ARMv9.3 introduces FEAT_D128, which provides a 128 bit page -- 2.43.0