From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 33652606A326 for ; Thu, 5 Nov 2026 18:40:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=AQ3Ee0zm Received: by kanga.kvack.org (Postfix) id 4E5766B05B6; Thu, 5 Nov 2026 13:40:05 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 496096B05B7; Thu, 5 Nov 2026 13:40:05 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3ABB86B05B8; Thu, 5 Nov 2026 13:40:05 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 1E3B16B05B6 for ; Thu, 5 Nov 2026 13:40:05 -0500 (EST) Received: from smtpin16.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 25E381C4498 for ; Thu, 5 Nov 2026 18:40:03 +0000 (UTC) X-FDA: 85401929886.16.E97CFBC Received: from mta1.migadu.com (out-203.mta1.migadu.com [95.215.58.203]) by imf19.hostedemail.com (Postfix) with ESMTP id 23B041A0007 for ; Thu, 5 Nov 2026 18:40:00 +0000 (UTC) Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=AQ3Ee0zm; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf19.hostedemail.com: domain of usama.arif@linux.dev designates 95.215.58.203 as permitted sender) smtp.mailfrom=usama.arif@linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1793904001; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=lYBFuxLfjxEha3Zx3xH+M3FFSL5fyPFntbBy1o8Jggo=; b=PjKlyexFXDI1UKQsqMKDCTMBlpg3c/mkNYtxlwbrT2n2vSlrrF+koIbgPNxu9o/aHZ0byK jGePB3cDAn2k+BiUprDl+yGDoSSoiqkGFewXXEx0i3XL4EQ1Kds1O86k4BupE5GfgSSWUj mvTLKJcGsAlFt7dxMLA7GBtIyTImsr8= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1793904001; b=dXy2HY0RVPKiE92JTNyQbfNvHWdWyhe1U7o08szcXFbXxbEctwcDO7Wc/hh+ZOctqJqFIl 3NjlV+bg7rw2SMmBjh5aEx9TU+0OpjPAELgM4JiOGsNWmudu+s+shDaPU3exa0g2p1wECP micpKwAP7W27uY77Rd2HL0AFjjFlBQg= ARC-Authentication-Results: i=1; imf19.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=AQ3Ee0zm; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf19.hostedemail.com: domain of usama.arif@linux.dev designates 95.215.58.203 as permitted sender) smtp.mailfrom=usama.arif@linux.dev X-Envelope-To: linux-mm@kvack.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-mm@kvack.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-Stat-Signature: uq1tcgksryr74n5u7hjj6a3nw58xfboa X-Rspam-User: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 23B041A0007 X-HE-Tag: 1793904000-70028 X-HE-Meta: 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 S9n/0/Dv BiuYA2/d2uPUcb2x112h9XRuc2xri3/2KrlwsPCS/nmcq8mRGRJZnVuWub2hqSEdFNu8xtI972bvZE243Fq5JpPoVI+BYPpNJzgvkzyQ224n94LKZxyj/OakEdJx4tiaxn+rK3+z0WVTsOF/lb4V049bqfUo1n2Oht5EcjBtyEvkOs5AXCbYdOV8Qbp7CRZ2Hxxdrl40+XAVcBfQpd2UoA3zZ1ertzzhg9NvpaYEciOEDVrccaRdvtEbgx3SIyaN+/5zhRsmZKM6cyOz01RCGOFOCUC+PzYELLnLAaU8wlnMI5jZhCBHTfJmtC9SyE45bJsx+yiMtBMwEdWmMcaCw9PUPHLv2uyV5EUnX0K69DYSaBYsSoQb9VJaYiQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: 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