From patchwork Fri May 30 12:42:23 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 354163 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 73CB51400E5 for ; Fri, 30 May 2014 22:45:29 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932868AbaE3Mp0 (ORCPT ); Fri, 30 May 2014 08:45:26 -0400 Received: from cantor2.suse.de ([195.135.220.15]:34276 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751115AbaE3MnA (ORCPT ); Fri, 30 May 2014 08:43:00 -0400 Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 6390EAD41; Fri, 30 May 2014 12:42:57 +0000 (UTC) From: Alexander Graf To: kvm-ppc@vger.kernel.org Cc: kvm@vger.kernel.org, pbonzini@redhat.com, mtosatti@redhat.com Subject: [PULL 08/41] KVM: PPC: Book3S_64 PR: Access shadow slb in big endian Date: Fri, 30 May 2014 14:42:23 +0200 Message-Id: <1401453776-55285-9-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1401453776-55285-1-git-send-email-agraf@suse.de> References: <1401453776-55285-1-git-send-email-agraf@suse.de> Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org The "shadow SLB" in the PACA is shared with the hypervisor, so it has to be big endian. We access the shadow SLB during world switch, so let's make sure we access it in big endian even when we're on a little endian host. Signed-off-by: Alexander Graf --- arch/powerpc/kvm/book3s_64_slb.S | 33 ++++++++++++++++----------------- 1 file changed, 16 insertions(+), 17 deletions(-) diff --git a/arch/powerpc/kvm/book3s_64_slb.S b/arch/powerpc/kvm/book3s_64_slb.S index 4f12e8f..596140e 100644 --- a/arch/powerpc/kvm/book3s_64_slb.S +++ b/arch/powerpc/kvm/book3s_64_slb.S @@ -17,29 +17,28 @@ * Authors: Alexander Graf */ -#ifdef __LITTLE_ENDIAN__ -#error Need to fix SLB shadow accesses in little endian mode -#endif - #define SHADOW_SLB_ESID(num) (SLBSHADOW_SAVEAREA + (num * 0x10)) #define SHADOW_SLB_VSID(num) (SLBSHADOW_SAVEAREA + (num * 0x10) + 0x8) #define UNBOLT_SLB_ENTRY(num) \ - ld r9, SHADOW_SLB_ESID(num)(r12); \ - /* Invalid? Skip. */; \ - rldicl. r0, r9, 37, 63; \ - beq slb_entry_skip_ ## num; \ - xoris r9, r9, SLB_ESID_V@h; \ - std r9, SHADOW_SLB_ESID(num)(r12); \ + li r11, SHADOW_SLB_ESID(num); \ + LDX_BE r9, r12, r11; \ + /* Invalid? Skip. */; \ + rldicl. r0, r9, 37, 63; \ + beq slb_entry_skip_ ## num; \ + xoris r9, r9, SLB_ESID_V@h; \ + STDX_BE r9, r12, r11; \ slb_entry_skip_ ## num: #define REBOLT_SLB_ENTRY(num) \ - ld r10, SHADOW_SLB_ESID(num)(r11); \ - cmpdi r10, 0; \ - beq slb_exit_skip_ ## num; \ - oris r10, r10, SLB_ESID_V@h; \ - ld r9, SHADOW_SLB_VSID(num)(r11); \ - slbmte r9, r10; \ - std r10, SHADOW_SLB_ESID(num)(r11); \ + li r8, SHADOW_SLB_ESID(num); \ + li r7, SHADOW_SLB_VSID(num); \ + LDX_BE r10, r11, r8; \ + cmpdi r10, 0; \ + beq slb_exit_skip_ ## num; \ + oris r10, r10, SLB_ESID_V@h; \ + LDX_BE r9, r11, r7; \ + slbmte r9, r10; \ + STDX_BE r10, r11, r8; \ slb_exit_skip_ ## num: /******************************************************************************