From nobody Mon Feb 9 01:21:14 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 545B027426B for ; Fri, 28 Feb 2025 18:25:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740767120; cv=none; b=D4IZiSWInRWJ3ig/LtetuIJ98GlUp7KRNT55vpn8l2iZq/t2QzY4OtKXEFFKeqXUJrQgWXDzx8wfpM35GfTZKMII/WUlZMfLoh8uPMrGyh9BIzKZ/BoWrtuxASZ1nICWCzqT6KPhlFvVxjLEQI6PtnfRJ4TkodfHuH9axxtaRVM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740767120; c=relaxed/simple; bh=djccPEEFMYaKHClDuUek9aMXVl4Z7KLTcuB2qpFbJlc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=TRSPXXHG9eB8InQuQof+YdDhkA6JT2sv+dUJ72kuAcLi0MO2iM5lMhbYB6H47G/xLcmojV+choAlmNBOjgl7NK7wfuv55k7Cvs9IuPz1dM4uv4mweItN4MWzhw7cJelUblCsSDcpprxx400F0XpYKRkc/rVIw47G6JXoFlT+mBc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 B77B4176C; Fri, 28 Feb 2025 10:25:33 -0800 (PST) Received: from mazurka.cambridge.arm.com (mazurka.cambridge.arm.com [10.2.80.18]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 59A823F6A8; Fri, 28 Feb 2025 10:25:15 -0800 (PST) From: =?UTF-8?q?Miko=C5=82aj=20Lenczewski?= To: ryan.roberts@arm.com, suzuki.poulose@arm.com, yang@os.amperecomputing.com, catalin.marinas@arm.com, will@kernel.org, joro@8bytes.org, jean-philippe@linaro.org, mark.rutland@arm.com, joey.gouly@arm.com, oliver.upton@linux.dev, james.morse@arm.com, broonie@kernel.org, maz@kernel.org, david@redhat.com, akpm@linux-foundation.org, jgg@ziepe.ca, nicolinc@nvidia.com, mshavit@google.com, jsnitsel@redhat.com, smostafa@google.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev Cc: =?UTF-8?q?Miko=C5=82aj=20Lenczewski?= Subject: [PATCH v2 3/4] arm64/mm: Elide tlbi in contpte_convert() under BBML2 Date: Fri, 28 Feb 2025 18:24:03 +0000 Message-ID: <20250228182403.6269-5-miko.lenczewski@arm.com> X-Mailer: git-send-email 2.45.3 In-Reply-To: <20250228182403.6269-2-miko.lenczewski@arm.com> References: <20250228182403.6269-2-miko.lenczewski@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable If we support bbml2 without conflict aborts, we can avoid the final flush and have hardware manage the tlb entries for us. Avoiding flushes is a win. Signed-off-by: Miko=C5=82aj Lenczewski Reviewed-by: Ryan Roberts --- arch/arm64/mm/contpte.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm64/mm/contpte.c b/arch/arm64/mm/contpte.c index 145530f706a9..77ed03b30b72 100644 --- a/arch/arm64/mm/contpte.c +++ b/arch/arm64/mm/contpte.c @@ -72,9 +72,6 @@ static void contpte_convert(struct mm_struct *mm, unsigne= d long addr, __flush_tlb_range(&vma, start_addr, addr, PAGE_SIZE, true, 3); =20 __set_ptes(mm, start_addr, start_ptep, pte, CONT_PTES); - - if (system_supports_bbml2_noabort()) - __flush_tlb_range(&vma, start_addr, addr, PAGE_SIZE, true, 3); } =20 void __contpte_try_fold(struct mm_struct *mm, unsigned long addr, --=20 2.45.3