From nobody Mon Feb 9 05:19:31 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=quarantine dis=none) header.from=antgroup.com ARC-Seal: i=1; a=rsa-sha256; t=1768017668; cv=none; d=zohomail.com; s=zohoarc; b=hCzckTWwyL76RuoykDWJcKChdz68xlleg4EFZCyt/35upgtQ/IMBb2/HvMWt6y5ff8QFxJCOoj2F2z0hTJ3DP5uSwCTsYJI2/UTg2Cpf8CxHFlJGf1Ea0ui+ZX0ePL9p6NHAc5sRddIoIdVPspIWDTU3SJpUfmlM6iX/s4bcEjE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1768017668; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=A6dPHnR7FvaayZTlFNBJHodwAg7ZKvD60GtSZKVizUI=; b=C+ss7xVib6y7q13u1E3DTJB5EdzDQjBol0siM4+O0pJ3jtH7EXbvzMh7zvE9BEMeBfGf6GhNdwsNm3YXZnBb+p4U9xENb/dd6q3bEpXJwaJns4xAVjKXJJmLtOSlvBXgWTUXvJIY1sPEqtHPVKNGDc2QoMOkXYiwx0s4vDx8Le4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1768017667978121.17930610709334; Fri, 9 Jan 2026 20:01:07 -0800 (PST) Received: from list by lists.xenproject.org with outflank-mailman.1199325.1515870 (Exim 4.92) (envelope-from ) id 1veQ9Q-0002Ea-W1; Sat, 10 Jan 2026 04:00:32 +0000 Received: by outflank-mailman (output) from mailman id 1199325.1515870; Sat, 10 Jan 2026 04:00:32 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1veQ9Q-0002ET-T8; Sat, 10 Jan 2026 04:00:32 +0000 Received: by outflank-mailman (input) for mailman id 1199325; Sat, 10 Jan 2026 04:00:31 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1veQ9O-0002ED-Ve for xen-devel@lists.xenproject.org; Sat, 10 Jan 2026 04:00:31 +0000 Received: from out28-77.mail.aliyun.com (out28-77.mail.aliyun.com [115.124.28.77]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id e39f1a0b-edd8-11f0-9ccf-f158ae23cfc8; Sat, 10 Jan 2026 05:00:26 +0100 (CET) Received: from localhost(mailfrom:houwenlong.hwl@antgroup.com fp:SMTPD_---.g2udv12_1768017621 cluster:ay29) by smtp.aliyun-inc.com; Sat, 10 Jan 2026 12:00:21 +0800 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e39f1a0b-edd8-11f0-9ccf-f158ae23cfc8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=antgroup.com; s=default; t=1768017623; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=A6dPHnR7FvaayZTlFNBJHodwAg7ZKvD60GtSZKVizUI=; b=kr0oejG0VHA98SVlNkPKz0CRuH2liazdL+MHNYTI2m4bKCXgyalJlsILGigcPXmIgmlOJ1Dc/n838lcuHVggu5PcpxTvN1ZvEKs+CghsCam3xNV578Ksg0j7Ig1OvCa+uGIxFB+9we7TUCGO8Ki6RGqN56At+yAXXzerzCnVN5s= From: Hou Wenlong To: linux-kernel@vger.kernel.org Cc: Hou Wenlong , Juergen Gross , Boris Ostrovsky , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , xen-devel@lists.xenproject.org Subject: [PATCH RESEND v2] x86/xen/pvh: Enable PAE mode for 32-bit guest only when CONFIG_X86_PAE is set Date: Sat, 10 Jan 2026 12:00:08 +0800 Message-Id: X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @antgroup.com) X-ZM-MESSAGEID: 1768017670718158500 Content-Type: text/plain; charset="utf-8" The PVH entry is available for 32-bit KVM guests, and 32-bit KVM guests do not depend on CONFIG_X86_PAE. However, mk_early_pgtbl_32() builds different pagetables depending on whether CONFIG_X86_PAE is set. Therefore, enabling PAE mode for 32-bit KVM guests without CONFIG_X86_PAE being set would result in a boot failure during CR3 loading. Signed-off-by: Hou Wenlong Reviewed-by: Juergen Gross --- I resend this because I encountered the 32-bit KVM guest PVH booting failur= e again. I hope this can be fixed. original v2: https://lore.kernel.org/all/0469c27833be58aa66471920aa77922489d86c63.171387= 3613.git.houwenlong.hwl@antgroup.com --- arch/x86/platform/pvh/head.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/platform/pvh/head.S b/arch/x86/platform/pvh/head.S index 344030c1a81d..53ee2d53fcf8 100644 --- a/arch/x86/platform/pvh/head.S +++ b/arch/x86/platform/pvh/head.S @@ -91,10 +91,12 @@ SYM_CODE_START(pvh_start_xen) =20 leal rva(early_stack_end)(%ebp), %esp =20 +#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) /* Enable PAE mode. */ mov %cr4, %eax orl $X86_CR4_PAE, %eax mov %eax, %cr4 +#endif =20 #ifdef CONFIG_X86_64 /* Enable Long mode. */ base-commit: b7dccac786071bba98b0d834c517fd44a22c50f9 prerequisite-patch-id: 590fa7e96c6bb8e0b9d15017cfa5ce1eb314957a --=20 2.31.1