Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755554AbbG1Jqj (ORCPT ); Tue, 28 Jul 2015 05:46:39 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:36114 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755481AbbG1Jp6 (ORCPT ); Tue, 28 Jul 2015 05:45:58 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, James Hogan , linux-mips@linux-mips.org, Ralf Baechle , Jiri Slaby Subject: [PATCH 3.12 091/124] MIPS: Fix KVM guest fixmap address Date: Tue, 28 Jul 2015 11:43:45 +0200 Message-Id: <5e30bb61d6e081c1728af25e7737bafb71fb2fbd.1438076484.git.jslaby@suse.cz> X-Mailer: git-send-email 2.4.6 In-Reply-To: <90d8a5681e4a9e320611b422f0ed012e148c2bca.1438076484.git.jslaby@suse.cz> References: <90d8a5681e4a9e320611b422f0ed012e148c2bca.1438076484.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1678 Lines: 49 From: James Hogan 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 8e748c8d09a9314eedb5c6367d9acfaacddcdc88 upstream. KVM guest kernels for trap & emulate run in user mode, with a modified set of kernel memory segments. However the fixmap address is still in the normal KSeg3 region at 0xfffe0000 regardless, causing problems when cache alias handling makes use of them when handling copy on write. Therefore define FIXADDR_TOP as 0x7ffe0000 in the guest kernel mapped region when CONFIG_KVM_GUEST is defined. Signed-off-by: James Hogan Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9887/ Signed-off-by: Ralf Baechle Signed-off-by: Jiri Slaby --- arch/mips/include/asm/mach-generic/spaces.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/mips/include/asm/mach-generic/spaces.h b/arch/mips/include/asm/mach-generic/spaces.h index 9488fa5f8866..afc96ecb9004 100644 --- a/arch/mips/include/asm/mach-generic/spaces.h +++ b/arch/mips/include/asm/mach-generic/spaces.h @@ -94,7 +94,11 @@ #endif #ifndef FIXADDR_TOP +#ifdef CONFIG_KVM_GUEST +#define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000) +#else #define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) #endif +#endif #endif /* __ASM_MACH_GENERIC_SPACES_H */ -- 2.4.6 -- 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/