From patchwork Thu Jan 21 01:41:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 8076531 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 04C059F1C0 for ; Thu, 21 Jan 2016 01:40:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6459920575 for ; Thu, 21 Jan 2016 01:40:23 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AC0A920553 for ; Thu, 21 Jan 2016 01:40:22 +0000 (UTC) Received: from localhost ([::1]:45722 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aM4EY-0006wh-2b for patchwork-qemu-devel@patchwork.kernel.org; Wed, 20 Jan 2016 20:40:22 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50363) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aM4EP-0006wW-On for qemu-devel@nongnu.org; Wed, 20 Jan 2016 20:40:14 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aM4EM-00049N-EL for qemu-devel@nongnu.org; Wed, 20 Jan 2016 20:40:13 -0500 Received: from ozlabs.org ([103.22.144.67]:46630) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aM4EM-00048b-30; Wed, 20 Jan 2016 20:40:10 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 3833C140BDE; Thu, 21 Jan 2016 12:40:08 +1100 (AEDT) From: David Gibson To: bharata@linux.vnet.ibm.com, aik@ozlabs.ru, pbonzini@redhat.com Date: Thu, 21 Jan 2016 12:41:03 +1100 Message-Id: <1453340463-7654-1-git-send-email-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.5.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 103.22.144.67 Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org, David Gibson Subject: [Qemu-devel] [PATCH] pseries: Allow TCG h_enter to work with hotplugged memory X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The implementation of the H_ENTER hypercall for PAPR guests needs to enforce correct access attributes on the inserted HPTE. This means determining if the HPTE's real address is a regular RAM address (which requires attributes for coherent access) or an IO address (which requires attributes for cache-inhibited access). At the moment this check is implemented with (raddr < machine->ram_size), but that only handles addresses in the base RAM area, not any hotplugged RAM. This patch corrects the problem with a new helper. Signed-off-by: David Gibson Reviewed-by: Alexey Kardashevskiy --- hw/ppc/spapr_hcall.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c index cebceea..ea33bc7 100644 --- a/hw/ppc/spapr_hcall.c +++ b/hw/ppc/spapr_hcall.c @@ -84,10 +84,25 @@ static inline bool valid_pte_index(CPUPPCState *env, target_ulong pte_index) return true; } +static bool is_ram_address(sPAPRMachineState *spapr, hwaddr addr) +{ + MachineState *machine = MACHINE(spapr); + MemoryHotplugState *hpms = &spapr->hotplug_memory; + + if (addr < machine->ram_size) { + return true; + } + if ((addr >= hpms->base) + && ((addr - hpms->base) < memory_region_size(&hpms->mr))) { + return true; + } + + return false; +} + static target_ulong h_enter(PowerPCCPU *cpu, sPAPRMachineState *spapr, target_ulong opcode, target_ulong *args) { - MachineState *machine = MACHINE(spapr); CPUPPCState *env = &cpu->env; target_ulong flags = args[0]; target_ulong pte_index = args[1]; @@ -119,7 +134,7 @@ static target_ulong h_enter(PowerPCCPU *cpu, sPAPRMachineState *spapr, raddr = (ptel & HPTE64_R_RPN) & ~((1ULL << page_shift) - 1); - if (raddr < machine->ram_size) { + if (is_ram_address(spapr, raddr)) { /* Regular RAM - should have WIMG=0010 */ if ((ptel & HPTE64_R_WIMG) != HPTE64_R_M) { return H_PARAMETER;