Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756090Ab3IKQpA (ORCPT ); Wed, 11 Sep 2013 12:45:00 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:16410 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754249Ab3IKQo7 (ORCPT ); Wed, 11 Sep 2013 12:44:59 -0400 Date: Wed, 11 Sep 2013 18:44:56 +0200 Message-Id: <201309111644.r8BGiuDZ016325@localhost.localdomain> From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras CC: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Joakim Tjernlund Subject: [PATCH] powerpc 8xx: Fixing issue with CONFIG_PIN_TLB Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1051 Lines: 25 Activating CONFIG_PIN_TLB is supposed to pin the IMMR and the first three 8Mbytes pages. But the setting of the MD_CTR was missing so as the index is decremented every DTLB update, the pinning of the third 8Mbytes page was overwriting the DTLB entry for IMMR. Signed-off-by: Christophe Leroy diff -ur linux-3.11.org/arch/powerpc/kernel/head_8xx.S linux-3.11/arch/powerpc/kernel/head_8xx.S --- linux-3.11.org/arch/powerpc/kernel/head_8xx.S 2013-09-02 22:46:10.000000000 +0200 +++ linux-3.11/arch/powerpc/kernel/head_8xx.S 2013-09-09 11:28:54.000000000 +0200 @@ -862,6 +862,9 @@ addis r11, r11, 0x0080 /* Add 8M */ mtspr SPRN_MD_RPN, r11 + addi r10, r10, 0x0100 + mtspr SPRN_MD_CTR, r10 + addis r8, r8, 0x0080 /* Add 8M */ mtspr SPRN_MD_EPN, r8 mtspr SPRN_MD_TWC, r9 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/