From patchwork Tue Nov 3 03:15:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tiezhu Yang X-Patchwork-Id: 11875837 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 975B814B2 for ; Tue, 3 Nov 2020 03:15:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 83AB422277 for ; Tue, 3 Nov 2020 03:15:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725974AbgKCDPN (ORCPT ); Mon, 2 Nov 2020 22:15:13 -0500 Received: from mail.loongson.cn ([114.242.206.163]:47016 "EHLO loongson.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725968AbgKCDPN (ORCPT ); Mon, 2 Nov 2020 22:15:13 -0500 Received: from linux.localdomain (unknown [113.200.148.30]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dx7387y6BfU3sEAA--.3657S3; Tue, 03 Nov 2020 11:15:08 +0800 (CST) From: Tiezhu Yang To: Thomas Bogendoerfer , Huacai Chen , Jiaxun Yang Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, Xuefeng Li Subject: [PATCH v2 1/6] MIPS: Loongson64: Do not write the read only field LPA of CP0_CONFIG3 Date: Tue, 3 Nov 2020 11:15:01 +0800 Message-Id: <1604373306-3599-2-git-send-email-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1604373306-3599-1-git-send-email-yangtiezhu@loongson.cn> References: <1604373306-3599-1-git-send-email-yangtiezhu@loongson.cn> X-CM-TRANSID: AQAAf9Dx7387y6BfU3sEAA--.3657S3 X-Coremail-Antispam: 1UD129KBjvJXoW7ZF1rXry7ury7JrW5uw1DAwb_yoW8Ar43pa n5A3WkGr45Ww1UuFn5CryUurWrJr93KrW2vanFgrykXasxK342qr1ft3W8JFyrXa95K3Wx Wr9Y9r4jqanrG3JanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBv14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r1I6r4UM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UM2 8EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Cr1j6rxd M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW8GwCF04 k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18 MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr4 1lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1l IxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4 A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JU2tCcUUUUU= X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org The field LPA of CP0_CONFIG3 register is read only for Loongson64, so the write operations are meaningless, remove them. Signed-off-by: Tiezhu Yang --- v2: No changes arch/mips/include/asm/mach-loongson64/kernel-entry-init.h | 8 -------- arch/mips/loongson64/numa.c | 3 --- 2 files changed, 11 deletions(-) diff --git a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h index 87a5bfb..e4d77f4 100644 --- a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h +++ b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h @@ -19,10 +19,6 @@ .macro kernel_entry_setup .set push .set mips64 - /* Set LPA on LOONGSON3 config3 */ - mfc0 t0, CP0_CONFIG3 - or t0, (0x1 << 7) - mtc0 t0, CP0_CONFIG3 /* Set ELPA on LOONGSON3 pagegrain */ mfc0 t0, CP0_PAGEGRAIN or t0, (0x1 << 29) @@ -54,10 +50,6 @@ .macro smp_slave_setup .set push .set mips64 - /* Set LPA on LOONGSON3 config3 */ - mfc0 t0, CP0_CONFIG3 - or t0, (0x1 << 7) - mtc0 t0, CP0_CONFIG3 /* Set ELPA on LOONGSON3 pagegrain */ mfc0 t0, CP0_PAGEGRAIN or t0, (0x1 << 29) diff --git a/arch/mips/loongson64/numa.c b/arch/mips/loongson64/numa.c index cf9459f..c7e3cced 100644 --- a/arch/mips/loongson64/numa.c +++ b/arch/mips/loongson64/numa.c @@ -40,9 +40,6 @@ static void enable_lpa(void) unsigned long value; value = __read_32bit_c0_register($16, 3); - value |= 0x00000080; - __write_32bit_c0_register($16, 3, value); - value = __read_32bit_c0_register($16, 3); pr_info("CP0_Config3: CP0 16.3 (0x%lx)\n", value); value = __read_32bit_c0_register($5, 1);