From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-62.mta1.migadu.com [95.215.58.62]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DC11D44683D for ; Fri, 2 Oct 2026 09:55:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.62 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790934955; cv=none; b=XHjiDRskrlJaxbvhE/DZDGAuVTm4hrnhkvMhal5/ZH8AiRU7KFrV4UHkzI77thErREJsitbTQnNOqxrpd7mY+qaQVP1HXxzSncEQlAPtBKe4RiLbQ2C9JKmZx/0cPYmzKNwF7tW5Iv+A+H7OUQoEmKFiYWpXj50eZqL+AooARPg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790934955; c=relaxed/simple; bh=pbTbkeINEId7JS6AnzSLx3O1ncG52KDn9IhrFLfOFTg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=K8YSYp/1jstQ/J3KYxnsQz9LY6pgSE3hvc3dTvm3fnRMf5G4FykI2aZJcEiy/h4WIh3LtQ4gW0CIS+c/btRuMkeAZdAgwVX8mJ0DI0Z6mZ6HS1GGw4V8Tebzi152dV2u3DLQNFVwqM9oLtRuWRmW17/OGP0qcwdrK1PnskTP6QA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=v5WfznAb; arc=none smtp.client-ip=95.215.58.62 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="v5WfznAb" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=pbTbkeINEId7JS6AnzSLx3O1ncG52KDn9IhrFLfOFTg=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1790934951; v=1; x=1791539751; b=v5WfznAbhAes7HSxgjxVB9oJXmKscMBH41tsKUgnkOB2td9u3AxnomXR4jsFDLnRSswAweOe x83gbdD5oEpLPzTjaFGndfk4hsgXKyYgvuf1kvIc+hDpLvY0zlv8800vy87H9rra/fHI3iAWVt/ 0xS9L8li52R6R/Z8VPibC1DA= X-Envelope-To: linux-kernel@vger.kernel.org Received: by mta12.migadu.com with ESMTPS id f75483ed85d9eab5; Fri, 02 Oct 2026 09:55:51 +0000 X-Mizu-Trace-ID: f75483ed85d9eab5 X-Migadu-Flow: FLOW_OUT From: Usama Arif To: Andrew Morton , david@kernel.org, chrisl@kernel.org, kasong@tencent.com, ljs@kernel.org, ziy@nvidia.com, linux-mm@kvack.org Cc: ying.huang@linux.alibaba.com, Baoquan He , willy@infradead.org, youngjun.park@lge.com, hannes@cmpxchg.org, riel@surriel.com, shakeel.butt@linux.dev, alex@ghiti.fr, kas@kernel.org, baohua@kernel.org, dev.jain@arm.com, baolin.wang@linux.alibaba.com, Nico Pache , Liam R. Howlett , ryan.roberts@arm.com, Vlastimil Babka , lance.yang@linux.dev, linux-kernel@vger.kernel.org, nphamcs@gmail.com, shikemeng@huaweicloud.com, yosry@kernel.org, qi.zheng@linux.dev, luizcap@redhat.com, kernel-team@meta.com, Usama Arif , Catalin Marinas , Will Deacon Subject: [PATCH v8 02/30] arm64: mm: add PMD swap-exclusive helpers Date: Fri, 2 Oct 2026 02:52:16 -0700 Message-ID: <20261002095503.3585565-3-usama.arif@linux.dev> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261002095503.3585565-1-usama.arif@linux.dev> References: <20261002095503.3585565-1-usama.arif@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Prepare for keeping a PMD-mapped anonymous THP mapped by a PMD across the swap round-trip, which makes PG_anon_exclusive have to survive in a swap PMD and not just in a swap PTE. arm64 encodes a swap PMD exactly like a swap PTE, so the new helpers wrap the PTE ones and reuse PTE_SWP_EXCLUSIVE. Cc: Catalin Marinas Cc: Will Deacon Signed-off-by: Usama Arif --- arch/arm64/include/asm/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index e89ec5f4787b4..d3f53a601aed3 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -599,6 +599,12 @@ static inline int pmd_protnone(pmd_t pmd) #define pmd_swp_clear_uffd(pmd) \ pte_pmd(pte_swp_clear_uffd(pmd_pte(pmd))) #endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */ +#ifdef CONFIG_ARCH_HAS_PMD_SOFTLEAVES +#define pmd_swp_exclusive(pmd) pte_swp_exclusive(pmd_pte(pmd)) +#define pmd_swp_mkexclusive(pmd) pte_pmd(pte_swp_mkexclusive(pmd_pte(pmd))) +#define pmd_swp_clear_exclusive(pmd) \ + pte_pmd(pte_swp_clear_exclusive(pmd_pte(pmd))) +#endif #define pmd_write(pmd) pte_write(pmd_pte(pmd)) -- 2.53.0-Meta