From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8417FCE79AC for ; Wed, 20 Sep 2023 04:08:01 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id EA7DC6B0101; Wed, 20 Sep 2023 00:08:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E58266B0102; Wed, 20 Sep 2023 00:08:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D46746B0103; Wed, 20 Sep 2023 00:08:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id BFBF96B0101 for ; Wed, 20 Sep 2023 00:08:00 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 91346120E9C for ; Wed, 20 Sep 2023 04:08:00 +0000 (UTC) X-FDA: 81255642720.03.B942BBA Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf10.hostedemail.com (Postfix) with ESMTP id 00808C0002 for ; Wed, 20 Sep 2023 04:07:58 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=pNyYvaYR; dmarc=none; spf=none (imf10.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1695182879; 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-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=JLNYkjKCehF4iToRT4MbplPTWfLqsOdGAh15/ETZVoY=; b=2AEKg3/tsm+iyXANFZm5ErjowolVBXKxaGQhhtFOPWDBRzIwcn/NwaQ++1+oYgnYptsbiS oOCasCTVZqIQvcQMfTy+yX5OU5etTtzSA9TWZigdmJHo3SNp3wbdbEiCb4cxVbuNaREv7f lclnsUT+F/NK9/N1+pxMT1ysuEMRBo8= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=pNyYvaYR; dmarc=none; spf=none (imf10.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1695182879; a=rsa-sha256; cv=none; b=RdERm+av00DTo6ucZf8/O06LQrP5UxWs6szqpfO2gejateckVri7Ld/RGkoBIWwdI3bStG GmoiIicvELhINbGRXects4UlBqFkqLPYjHa2LUsci71bB1V2ih1YbU06UF7q6ut4y/WI14 kXuJcjRYvl+xkmovRDFvBafDsj+IVjw= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=JLNYkjKCehF4iToRT4MbplPTWfLqsOdGAh15/ETZVoY=; b=pNyYvaYRdT8gKeeK6T7084kA2E 2G6Vdut5/gB2v4MZFBAMYMpOzHnRiibwmAInUJEOJhyCRlguKE3Q/UBSSVnIkO0+++6Wp/BmlDwcT 2qFuLCtay9TJXoeemdPHXHzHArI4TT2Pt87Z4aJwMybRpxN+omFHML5YAD+aFFjrw74nZIRkBB8R8 6wj9NzJTpQhB94POcgaaE1EQ9Gzb4kaC3UDv5mPHEDUN/0uDtFEhqixCRRNfkU0QwggpYWYynHTU8 4iImL6pNDk60ej5zgVNoCNsmJJniU4CBDFFF8OwIOFVnNaQxjsYwFxHzXWX1s6dN8l56YoTPUWUD/ bFgJ+2GQ==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1qioVH-003dJl-AS; Wed, 20 Sep 2023 04:07:55 +0000 Date: Wed, 20 Sep 2023 05:07:55 +0100 From: Matthew Wilcox To: Andrew Morton Cc: linux-mm@kvack.org, Yin Fengwei , Dave Hansen , David Hildenbrand , Thomas Gleixner , syzbot+55cc72f8cc3a549119df@syzkaller.appspotmail.com Subject: Re: [PATCH 2/2] mm: Abstract moving to the next PFN Message-ID: References: <20230920035336.854212-1-willy@infradead.org> <20230920035336.854212-2-willy@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230920035336.854212-2-willy@infradead.org> X-Rspamd-Queue-Id: 00808C0002 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: k75883ed8mj9r18o4yg5pdy6kxweonse X-HE-Tag: 1695182878-623860 X-HE-Meta: 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 tI+joGhu lJhJ7DZTRgDHvqGTphNjkj55os2ll6tRjwpTXWftYqI41tmE1/znjCWM4s8NT8pSFN+wGXUkmy8xGLImFmHpufy9fBECUoiaX56Qpd6u/AhQYBweJoSEpELE8eNZ+n5lc5C7m0Zif6uMy20YIJOQRmEeqBU/wrbMoczFOJl5Tjr5gjuEf6XnG1tRsqZ3haav0Dxcgx9Dk4opqukiy55kV9epeY0n3Lgr/K7D/TvsV4VkTkcE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Sep 20, 2023 at 04:53:36AM +0100, Matthew Wilcox (Oracle) wrote: > In order to fix the L1TF vulnerability, x86 can invert the PTE bits for > PROT_NONE VMAs, which means we cannot move from one PTE to the next by > adding 1 to the PFN field of the PTE. Abstract advancing the PTE to > the next PFN through a pte_next_pfn() function/macro. Argh, wrong version. New version coming up.