From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-234.mta0.migadu.com [91.218.175.234]) (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 0A8EA2AEEB for ; Fri, 2 Oct 2026 09:56:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.234 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790934966; cv=none; b=q7jksubUqkOkQhGGMwO4GtJEvG2hEKZQxI++8ehrokEHjqSpf+PfS6/WDLS1iNU4m5yy4AQneb0/FVl4NV9iktbdnFneg3AjT5hxtZE0pSovmdVCBTmUeJeh6mssog7eIAR6SQzUkROt4O0sMAOlWPh0Ak0JNjeUdgcRkTnETTs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790934966; c=relaxed/simple; bh=+539FMbDWr/qpvdIvQSVHv0n+KmhLVFRnsglmFqW/I0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eU7EXIc4u228Vy2bxWGINRO+eQr66r+KXNb6/WPh1WMAw53v9OvSvT6XoWjlpTFZCH43zIbe10mbhy6L7Ip+ZpdT2iGRgzACZQB9wgN8N0j03Oc2/zmqxylFU8lH2SBztqSLmDfgbVcFk0AdkLw4z9HLSFFRkKhyyNfla6ejnLM= 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=do/z2PmR; arc=none smtp.client-ip=91.218.175.234 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="do/z2PmR" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=+539FMbDWr/qpvdIvQSVHv0n+KmhLVFRnsglmFqW/I0=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1790934962; v=1; x=1791539762; b=do/z2PmRkJ7t40I/oAiYXZRXQCdMDu0jJ/kg+x5NyNb25IjzyCqaSZUx8pUJoKPpASMbG7h8 OwxcZGlIK0yevjzstUNGsgYrg2FCyUJHeyBixroGbpCJCL8i5vHBWV8zIIu7R4QO8i78/5vzVC9 uN1Fj9Ecvom4k/FFsXNLJIzo= X-Envelope-To: linux-kernel@vger.kernel.org Received: by mta10.migadu.com with ESMTPS id 9ba74d8f9c205fbe; Fri, 02 Oct 2026 09:56:01 +0000 X-Mizu-Trace-ID: 9ba74d8f9c205fbe 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 , Madhavan Srinivasan Subject: [PATCH v8 04/30] powerpc: mm: add PMD swap-exclusive helpers Date: Fri, 2 Oct 2026 02:52:18 -0700 Message-ID: <20261002095503.3585565-5-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. book3s64 builds a swap PMD by running the PTE encoding over pmd_pte(), so the PMD helpers wrap the PTE ones and reuse _PAGE_SWP_EXCLUSIVE, exactly as the soft-dirty PMD helpers next to them do. It is also the only powerpc variant that selects ARCH_HAS_PMD_SOFTLEAVES, via PPC_THP. Cc: Madhavan Srinivasan Signed-off-by: Usama Arif --- arch/powerpc/include/asm/book3s/64/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index dff8790a047db..458c85cebfa65 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -1060,6 +1060,12 @@ static inline pte_t *pmdp_ptep(pmd_t *pmd) #endif #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ +#ifdef CONFIG_ARCH_HAS_PMD_SOFTLEAVES +#define pmd_swp_mkexclusive(pmd) pte_pmd(pte_swp_mkexclusive(pmd_pte(pmd))) +#define pmd_swp_exclusive(pmd) pte_swp_exclusive(pmd_pte(pmd)) +#define pmd_swp_clear_exclusive(pmd) pte_pmd(pte_swp_clear_exclusive(pmd_pte(pmd))) +#endif + #ifdef CONFIG_ARCH_HAS_PTE_PROTNONE static inline int pmd_protnone(pmd_t pmd) { -- 2.53.0-Meta