Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751015AbaLOOrR (ORCPT ); Mon, 15 Dec 2014 09:47:17 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:38725 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752774AbaLOO2e (ORCPT ); Mon, 15 Dec 2014 09:28:34 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Markos Chandras , linux-mips@linux-mips.org, Ralf Baechle , Luis Henriques Subject: [PATCH 3.16.y-ckt 106/168] MIPS: r4kcache: Add EVA case for protected_writeback_dcache_line Date: Mon, 15 Dec 2014 14:26:00 +0000 Message-Id: <1418653622-21105-107-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1418653622-21105-1-git-send-email-luis.henriques@canonical.com> References: <1418653622-21105-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.7-ckt3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Markos Chandras commit 83fd43449baaf88fe5c03dd0081a062041837c51 upstream. Commit de8974e3f76c0 ("MIPS: asm: r4kcache: Add EVA cache flushing functions") added cache function for EVA using the cachee instruction. However, it didn't add a case for the protected_writeback_dcache_line. mips_dsemul() calls r4k_flush_cache_sigtramp() which in turn uses the protected_writeback_dcache_line() to flush the trampoline code back to memory. This used the wrong "cache" instruction leading to random userland crashes on non-FPU cores. Signed-off-by: Markos Chandras Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8331/ Signed-off-by: Ralf Baechle Signed-off-by: Luis Henriques --- arch/mips/include/asm/r4kcache.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h index 0b8bd28a0df1..ed038d7c3410 100644 --- a/arch/mips/include/asm/r4kcache.h +++ b/arch/mips/include/asm/r4kcache.h @@ -254,7 +254,11 @@ static inline void protected_flush_icache_line(unsigned long addr) */ static inline void protected_writeback_dcache_line(unsigned long addr) { +#ifdef CONFIG_EVA + protected_cachee_op(Hit_Writeback_Inv_D, addr); +#else protected_cache_op(Hit_Writeback_Inv_D, addr); +#endif } static inline void protected_writeback_scache_line(unsigned long addr) -- 2.1.3 -- 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/