From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f42.google.com (mail-ej1-f42.google.com [209.85.218.42]) (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 C48F631D372 for ; Wed, 27 May 2026 14:04:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.42 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779890653; cv=none; b=FNFRlt+RiRypC6lPtcjzq1SF0Sk/CCWQNe5InMXpw7kuGgVlRdmha9sxSdQQlpNi7/PqXSSNa+qIKgLtrkfCOrWzSEJBhP2eDERE8hDOQaZzwtB2zqLgxhR9n9JNIeWfe/8XFVtozyPzio+khEIL1w7RUrIdEMg12Aq8fGXo3Fw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779890653; c=relaxed/simple; bh=TgG4F2Uy8dT9NvKAvSrIxZvFKtJ4Zfec4pAvHfO81uU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=jGbOrTRqrbiuSUF+0BcJ4jMD8ZQMMrTSSV9W15cQWYjdOPU3nPScBeZ4pEx9rSCM3fNoWxWPxvM/uI3heh50UnWBp8NQ2hbFqOFIYkuWcQfgFYyHA/4hcsb2DvxwYWKnvpYznIZUTA6WFz7TIEBO0YIEkxjifVYPIn2bgwB1vKA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=iuDLBt1X; arc=none smtp.client-ip=209.85.218.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="iuDLBt1X" Received: by mail-ej1-f42.google.com with SMTP id a640c23a62f3a-bd9a71b565aso1401574066b.0 for ; Wed, 27 May 2026 07:04:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779890650; x=1780495450; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=TAYTp3YLYHc7rNj/43RIw8vpoUcMd82B06aT0BnHByQ=; b=iuDLBt1XTkG3x/xeJ9QB1F/PxzHDt+DhUMFi0KViWeFUS2bTfO57eVle/xOgK/tZJ0 +4jLcqg6N4pNP4OugcRfpWfCp6+pIFg/TDOwmGrnO6N3FVkEa5EALIedVg3VXQhrEdkO rpGEm+1EselgRryJgciioLtG5ch07pfjykhvWLSZELEHgV0CGK7av/IxGnMHa3Gg8Xwu bNay9bD3jxakAtsp7Uex2y7MWgz7w78+QJBl1wxZHqZJUjO4zdKLBDxtpcQ7r3FMqplq GBRkh/Qf9rX1rffjcCPmit7Yp00XJEDzk226av6ljSIwnV49/V8xvkZPGJe8cAOnoMi8 LnZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779890650; x=1780495450; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=TAYTp3YLYHc7rNj/43RIw8vpoUcMd82B06aT0BnHByQ=; b=A9YxiT23c6V7LDdkUFGMXOenBlHEtO1s1tjeVVskXPicghPSp7fWl5CJVqv4Q2V0Yw vWPqjeStM6P/WyImnaEF7mbF3y7M9b9J1QvrzEoM1FNI2I0smtimsjj/Qqzyo5YBvKG/ LD/YJvK62wnq/aLfoXGiu7TSkgXG6e/QnjI/SYJovPA5ai9kHlcN1vlIjeL+MSV63/5V 8/mQhSFx0tCRR/MRDmuNlr3+XWlH2DV2rX9+f+NqANL6zEoW1yiVSpw0K8IgS6m2vfv1 +zZIt7K2obd+G7O3Ey3sdxLlNtAS1EybHQtW+106D1F3QFyDb7aT0mffWAImlT5PsVnu lSrA== X-Forwarded-Encrypted: i=1; AFNElJ9QuLPZECK+p4XuKTHOpXPu83nf4rLpchbDiCddyP/5SWL4FesINJvuW+cq0eg6wLh376ok2tjMwGG+2ro=@vger.kernel.org X-Gm-Message-State: AOJu0YzXSgajm8lsAh4OWFs1W+r6byUtnvr4eW6KCZZ2xfJqpDJ0ZyE5 bQAuhiCX5hvLTk3RtCJma2+O0RxCn+y1xnoqLPehqfVfBlrcq7bXuXH7 X-Gm-Gg: Acq92OEBblNNUBwVu0kYnPJUU0hRLWeiY41qP1S4HTkQPd7XpKONQhwiI44vzaAwgDO 6zo03wnfdUFZESGS0MKY9rbGMMFlkjbB/8v3ayzhWu/8hLoASoWltW8vk/yKCSwTQkeJ6Mf4fIP cewJA/v5XUCB8uQGzcKFC5AgIYT4s9owR8IwotsmvQbj2gbO0zRvV95jRQwZzEIKdcZd2vsir2M ihs8dipWYVv7ZSlrbQsjL2223J9akNZak7EbP3BD7D7JsWjxRSFyOVkMAcBMVZRViZMqvCn60HM BhTvBUacBk6Ut6w5hrSeipDorJHwBd0DDIwSzoqf747ivk1RLTO3fGHdlsFFeXWHhItBYVnboVo NPgokyGWy8Hc6o085zOQnNluESwUOZ4PW2bpKE2dR3DXqysKBIZXO/QGpnz2jhuc+bHKdh4bcqJ Gk5senV7zwdMKnL1I8ruM5PYCfMiAx1SblY3AxZaf8rncBF2HX+HsYalZtQeVjRWr8GIcVvW0zw TBBWFGdMa368OHNNc0j6eUrFa7Mi+wV+Q== X-Received: by 2002:a17:907:b5a3:b0:ba4:f501:cb8b with SMTP id a640c23a62f3a-bdd22f294a3mr1037575166b.16.1779890649230; Wed, 27 May 2026 07:04:09 -0700 (PDT) Received: from fedora (cpc92878-cmbg18-2-0-cust539.5-4.cable.virginm.net. [86.16.54.28]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-45edb558f52sm6693771f8f.14.2026.05.27.07.04.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 May 2026 07:04:08 -0700 (PDT) From: Vishal Moola To: Dave Hansen , linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org Cc: Mike Rapoport , Lu Baolu , xen-devel@lists.xenproject.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Juergen Gross , Boris Ostrovsky , Vishal Moola Subject: [PATCH 0/9] Convert x86 pgd_lists to ptdescs Date: Wed, 27 May 2026 15:03:07 +0100 Message-ID: <20260527140316.294621-1-vishal.moola@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This continues the ptdesc conversions for x86[1]. This is a necessary step in preparation for the separate allocation of ptdescs from struct page. Once ptdescs are not wrappers, the pgd_list should be used to find our ptdesc, not page. In fact, after patch 4 we can successfully boot a 32-bit x86 kernel that separately allocates ptdescs. All of the patches are rather straightforward, I just kept them split up for ease of review. There are no intended functional changes as ptdescs are currently still wrappers around struct page. [1] https://lore.kernel.org/linux-mm/20260211195233.368497-1-vishal.moola@gmail.com/ ---------------- I've compiled and booted both 64 and 32 bit on a kernel with separately allocated ptdescs. I ensured the codepaths were hit for all the changes except Xen. This applies cleanly to the tip bot. I'm thinking this can go through Dave's mm. Vishal Moola (9): x86/mm/pat: Use IS_ENABLED() instead of ifdef x86/mm/pat: Convert __set_pmd_pte() to ptdescs x86/mm/pat: Convert collapse_pmd_page() to ptdescs x86/mm: Convert arch_sync_kernel_mappings() to ptdescs x86/mm: Convert sync_global_pgds_l5() to ptdescs x86/mm: Convert sync_global_pgds_l4() to ptdescs x86/mm: Convert pgd_page_get_mm() to ptdescs x86/xen: Convert xen_mm_pin_all() to ptdescs x86/xen: Convert xen_mm_unpin_all() to ptdescs arch/x86/include/asm/pgtable.h | 2 +- arch/x86/include/asm/pgtable_types.h | 2 +- arch/x86/mm/fault.c | 8 ++++---- arch/x86/mm/init_64.c | 16 ++++++++-------- arch/x86/mm/pat/set_memory.c | 17 ++++++++--------- arch/x86/mm/pgtable.c | 4 ++-- arch/x86/xen/mmu_pv.c | 22 +++++++++++----------- 7 files changed, 35 insertions(+), 36 deletions(-) -- 2.54.0