From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E19F4606A32D for ; Thu, 5 Nov 2026 18:40:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=EmFYerxb; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=AQ3Ee0zm 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-Unsubscribe-Post: List-Owner; bh=lYBFuxLfjxEha3Zx3xH+M3FFSL5fyPFntbBy1o8Jggo=; b=EmFYerxbJu89ZI 5+++/4K0QznxQ8tIaIIhjAgqZspvXsvSEXdFgV0VA8SCYlsGcedwL7T+x9yHLWz0ce4YZey39+FVD eSqvWgYvEunnN4F1olZSYFIq6ePJi296TFePgHUc2WDdPyHORD1ChxSP38qWpQkLHQHF6F0yfUqbe +piHyhVV5s9FOW/uGCZ2jeuaoE1E0MTD/5huDdSm4Wcv4PgYOHBoMDq6Crqsb5I7tiUsg124mNNIM kYP2SLkuttso5jHFSGJib2rprIRc9AfDKPUq1B17QLQDydFL3VZL4CH+6Ml1oFNvz/gZNPSpezTm2 lnIho3uZ/JWoLGjj231g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xP2Nj-0000000AAFP-4BCB; Thu, 05 Nov 2026 18:40:17 +0000 Received: from out-206.mta1.migadu.com ([95.215.58.206] helo=mta1.migadu.com) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xP2Na-0000000AABI-0f0m for linux-arm-kernel@lists.infradead.org; Thu, 05 Nov 2026 18:40:12 +0000 X-Envelope-To: linux-arm-kernel@lists.infradead.org DKIM-Signature: a=rsa-sha256; bh=XRcso4PQ7v/i8n+ltndwCCW38yTYyFOtjhZRQfQOu3s=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793903999; v=1; x=1794508799; b=AQ3Ee0zmoGLIrzFiqbNwH2X6z4iaE4E+ceCi77tS0EPnX4dETtsMFXi2XkALaPbkF5CBGMMy Kdn7kPwMRZDlQSnK7ZZE3U30X8kBunbwyKCdhgzdzRqW1CENcx+pkRvpuoHq84DRccjbVL7mVny VBCbRoF4lj6cxAjAaJn3j8cQ= X-Envelope-To: linux-arm-kernel@lists.infradead.org Received: by mta11.migadu.com with ESMTPS id 2158ee7e6f7dbbd2; Thu, 05 Nov 2026 18:39:59 +0000 X-Mizu-Trace-ID: 2158ee7e6f7dbbd2 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: chenhuacai@kernel.org, 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 , linux-arm-kernel@lists.infradead.org Subject: [PATCH v9 02/32] arm64: mm: add PMD swap-exclusive helpers Date: Thu, 5 Nov 2026 10:38:46 -0800 Message-ID: <20261105183940.2236717-3-usama.arif@linux.dev> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261105183940.2236717-1-usama.arif@linux.dev> References: <20261105183940.2236717-1-usama.arif@linux.dev> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261105_104006_387257_09EDD300 X-CRM114-Status: UNSURE ( 9.06 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.8 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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 Cc: linux-arm-kernel@lists.infradead.org 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 a474c9fb485ad..dfcb4b9e66f39 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -560,6 +560,12 @@ 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