From mboxrd@z Thu Jan 1 00:00:00 1970 From: guoren@kernel.org Subject: [PATCH 03/14] csky: fixup remove vdsp implement for kernel. Date: Mon, 31 Dec 2018 23:32:55 +0800 Message-ID: <1546270384-4590-3-git-send-email-guoren@kernel.org> References: <1546270384-4590-1-git-send-email-guoren@kernel.org> Return-path: In-Reply-To: <1546270384-4590-1-git-send-email-guoren@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: arnd@arndb.de Cc: guoren@kernel.org, linux-kernel@vger.kernel.org, rostedt@goodmis.org, mingo@redhat.com, oleg@redhat.com, linux-arch@vger.kernel.org, Guo Ren List-Id: linux-arch.vger.kernel.org From: Guo Ren The vr regs for vdsp only saved in task_switch not in every exception trap-in. The memcpy with vdsp instructions will destroy the vr regs for user space applications. Signed-off-by: Guo Ren --- arch/csky/abiv2/memcpy.S | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/arch/csky/abiv2/memcpy.S b/arch/csky/abiv2/memcpy.S index 987fec6..145bf3a 100644 --- a/arch/csky/abiv2/memcpy.S +++ b/arch/csky/abiv2/memcpy.S @@ -27,13 +27,7 @@ ENTRY(memcpy) LABLE_ALIGN .L_len_larger_16bytes: -#if defined(__CSKY_VDSPV2__) - vldx.8 vr0, (r1), r19 - PRE_BNEZAD (r18) - addi r1, 16 - vstx.8 vr0, (r0), r19 - addi r0, 16 -#elif defined(__CK860__) +#if defined(__CK860__) ldw r3, (r1, 0) stw r3, (r0, 0) ldw r3, (r1, 4) -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:59678 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726722AbeLaPd7 (ORCPT ); Mon, 31 Dec 2018 10:33:59 -0500 From: guoren@kernel.org Subject: [PATCH 03/14] csky: fixup remove vdsp implement for kernel. Date: Mon, 31 Dec 2018 23:32:55 +0800 Message-ID: <1546270384-4590-3-git-send-email-guoren@kernel.org> In-Reply-To: <1546270384-4590-1-git-send-email-guoren@kernel.org> References: <1546270384-4590-1-git-send-email-guoren@kernel.org> Sender: linux-arch-owner@vger.kernel.org List-ID: To: arnd@arndb.de Cc: guoren@kernel.org, linux-kernel@vger.kernel.org, rostedt@goodmis.org, mingo@redhat.com, oleg@redhat.com, linux-arch@vger.kernel.org, Guo Ren Message-ID: <20181231153255.cRuVbnKq9Ai7Go7Be6Gw26HTVCDcZ5gH-7OuJ7x-pMA@z> From: Guo Ren The vr regs for vdsp only saved in task_switch not in every exception trap-in. The memcpy with vdsp instructions will destroy the vr regs for user space applications. Signed-off-by: Guo Ren --- arch/csky/abiv2/memcpy.S | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/arch/csky/abiv2/memcpy.S b/arch/csky/abiv2/memcpy.S index 987fec6..145bf3a 100644 --- a/arch/csky/abiv2/memcpy.S +++ b/arch/csky/abiv2/memcpy.S @@ -27,13 +27,7 @@ ENTRY(memcpy) LABLE_ALIGN .L_len_larger_16bytes: -#if defined(__CSKY_VDSPV2__) - vldx.8 vr0, (r1), r19 - PRE_BNEZAD (r18) - addi r1, 16 - vstx.8 vr0, (r0), r19 - addi r0, 16 -#elif defined(__CK860__) +#if defined(__CK860__) ldw r3, (r1, 0) stw r3, (r0, 0) ldw r3, (r1, 4) -- 2.7.4