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 X-Spam-Level: X-Spam-Status: No, score=-8.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06CDCC04A6B for ; Wed, 8 May 2019 14:51:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CD8EB20989 for ; Wed, 8 May 2019 14:51:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727478AbfEHOvg (ORCPT ); Wed, 8 May 2019 10:51:36 -0400 Received: from mga14.intel.com ([192.55.52.115]:48394 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728153AbfEHOok (ORCPT ); Wed, 8 May 2019 10:44:40 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 May 2019 07:44:39 -0700 X-ExtLoop1: 1 Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 08 May 2019 07:44:34 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id DC7154AB; Wed, 8 May 2019 17:44:28 +0300 (EEST) From: "Kirill A. Shutemov" To: Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , David Howells Cc: Kees Cook , Dave Hansen , Kai Huang , Jacob Pan , Alison Schofield , linux-mm@kvack.org, kvm@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH, RFC 06/62] mm/khugepaged: Handle encrypted pages Date: Wed, 8 May 2019 17:43:26 +0300 Message-Id: <20190508144422.13171-7-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190508144422.13171-1-kirill.shutemov@linux.intel.com> References: <20190508144422.13171-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For !NUMA khugepaged allocates page in advance, before we found a VMA for collapse. We don't yet know which KeyID to use for the allocation. The page is allocated with KeyID-0. Once we know that the VMA is suitable for collapsing, we prepare the page for KeyID we need, based on vma_keyid(). Signed-off-by: Kirill A. Shutemov --- mm/khugepaged.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 449044378782..96326a7e9d61 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1055,6 +1055,16 @@ static void collapse_huge_page(struct mm_struct *mm, */ anon_vma_unlock_write(vma->anon_vma); + /* + * At this point new_page is allocated as non-encrypted. + * If VMA's KeyID is non-zero, we need to prepare it to be encrypted + * before coping data. + */ + if (vma_keyid(vma)) { + prep_encrypted_page(new_page, HPAGE_PMD_ORDER, + vma_keyid(vma), false); + } + __collapse_huge_page_copy(pte, new_page, vma, address, pte_ptl); pte_unmap(pte); __SetPageUptodate(new_page); -- 2.20.1