From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755419AbdKBJT3 (ORCPT ); Thu, 2 Nov 2017 05:19:29 -0400 Received: from mx2.suse.de ([195.135.220.15]:40010 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752560AbdKBJT1 (ORCPT ); Thu, 2 Nov 2017 05:19:27 -0400 From: Juergen Gross To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org Cc: boris.ostrovsky@oracle.com, Juergen Gross Subject: [PATCH v2 0/5] xen: grant table interface v2 support Date: Thu, 2 Nov 2017 10:19:16 +0100 Message-Id: <20171102091921.32344-1-jgross@suse.com> X-Mailer: git-send-email 2.12.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In order to support Linux to run as a pv guest on machines with huge memory (>16TB) or as a hvm guest with more than 16TB of memory the kernel has to support grant table interface v2, as v1 is limited to 32 bit frame numbers. This series re-adds that support (it has been removed in 2015) and restricts usage of v2 to the features of v1 in order to support migration to hosts which only support v1. V2 is selected only in the following cases: - the user has specified v2 via module parameter - in a pv guest if the maximum possible memory address of the host is above 16TB (memory hotplug taken into account) - in a hvm guest if the maximum guest memory address is above 16TB (again with memory hotplug taken into account) Changes in V2: - patch 2: remove update_trans_entry() from gnttab_ops (Boris Ostrovsky) - added new patch 4 - patch 5: use cpuid on pv and max_possible_pfn on hvm for version select Juergen Gross (5): xen: re-introduce support for grant v2 interface xen: limit grant v2 interface to the v1 functionality xen: add grant interface version dependent constants to gnttab_ops xen: update arch/x86/include/asm/xen/cpuid.h xen: select grant interface version arch/arm/xen/grant-table.c | 9 +- arch/x86/include/asm/xen/cpuid.h | 42 +++++-- arch/x86/xen/grant-table.c | 60 +++++++++- drivers/xen/grant-table.c | 244 +++++++++++++++++++++++++++++++++++---- include/xen/grant_table.h | 5 +- 5 files changed, 318 insertions(+), 42 deletions(-) -- 2.12.3