From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.11 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793904033; b=HWK8CcBAS2aVj6IoRvTTx1KBT1d7xa0t6EczNteUCShVgNiXJnQsa0mAqiRRddHemkRO ZhUYRVdtLmaYy9ZFRScedYZ186myeNId1enCptmn9YkkB+moIj/VBJjebjqyzpOWZwq0a adeHY7SCjIQ7m/BwK7LmrdSIhp5uUp+YNTOtdZIMQNXiaQjWL3NrTocChIcQNYeSzo8E6 eZNH2doBR10GeoO3etsQVbTC7SJacVZGxOpgl/SDbDAOlJePUNyx/mOyE/D6vIu2Hx9hL QfvLIIxoaV0rxTAikh742G4hoRKYl5aD4VdYes03o6TEYE6Y1LzfVdxOc10grIzRoRg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793904033; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=oFQCr7m3VJS53WKkGLDYfsPN+SWWbvo+wFSmzZ6dt3A=; b=tcg1kdZS3jxPAJGqfHBfUHwVE2iFawqBAxn+iW/1NFoT5oep2p+PNS2nPiD3wWdgzDoE 4kjXRU+ufvt6W4UEerWhVBwlNM36rhESUynKbQSOH2yOuogjUeLSl+SxqcZNRn2TZr8Io hJSvwJWnGDtRaOojxPFSfpk6VUeuNT/vlVCnBij4uLw4lyomWO7krkiaVYFBRbAtJ7Rv+ 4GZZ08oumW735AHnrQMk13d3GsqyYrZVNihppA2+Lzhieus50qFz/9WC3gWwQGyexPRuP Hh/EScDUsjhrFI9dLIi3vTJNTacVdQcB8GpWru8mMZar1mqni4HOXftMJ7gmpT3EsWA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=Ys07SmHJ; arc=none smtp.remote-ip=95.215.58.11 Received: from mta1.migadu.com (out-11.mta1.migadu.com [95.215.58.11]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C592F606A32E for ; Thu, 5 Nov 2026 18:40:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org C592F606A32E 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, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=Ys07SmHJ X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=pLzdrNFS5rkH0iH7ngCOM+5sJEDVQrr95NdzUO/r4P8=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793904030; v=1; x=1794508830; b=Ys07SmHJ2H/cIoQA+Q0tN7SuPuvVLR+FtppzrUHVPEl8PTOi0RosDXZ/Bzsomf9DT900ihDI heprMEyH1mQBtsgkRxuMgyt0lf9tInGLxfVuO2cJcWmK6Zdf7LaJ6084VoQGmNz5kPXg7ffuouN fTxdXB4UKAFImREglHl+A9Xo= X-Envelope-To: linux-kernel@vger.kernel.org Received: by mta11.migadu.com with ESMTPS id ac5bc4f198cc9f78; Thu, 05 Nov 2026 18:40:19 +0000 X-Mizu-Trace-ID: ac5bc4f198cc9f78 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 , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH v9 05/32] riscv: mm: add PMD swap-exclusive helpers Date: Thu, 5 Nov 2026 10:38:49 -0800 Message-ID: <20261105183940.2236717-6-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-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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. riscv encodes a swap PMD exactly like a swap PTE, so the new helpers wrap the PTE ones and reuse _PAGE_SWP_EXCLUSIVE. Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: linux-riscv@lists.infradead.org Signed-off-by: Usama Arif Reviewed-by: David Hildenbrand (Arm) --- arch/riscv/include/asm/pgtable.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 2ebd5fa5adc58..fda94dba9bb3e 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -1219,6 +1219,21 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte) } #ifdef CONFIG_ARCH_HAS_PMD_SOFTLEAVES +static inline bool pmd_swp_exclusive(pmd_t pmd) +{ + return pte_swp_exclusive(pmd_pte(pmd)); +} + +static inline pmd_t pmd_swp_mkexclusive(pmd_t pmd) +{ + return pte_pmd(pte_swp_mkexclusive(pmd_pte(pmd))); +} + +static inline pmd_t pmd_swp_clear_exclusive(pmd_t pmd) +{ + return pte_pmd(pte_swp_clear_exclusive(pmd_pte(pmd))); +} + #define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val(pmd) }) #define __swp_entry_to_pmd(swp) __pmd((swp).val) #endif /* CONFIG_ARCH_HAS_PMD_SOFTLEAVES */ -- 2.53.0-Meta