From nobody Mon Apr 27 03:19:26 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAB42C43334 for ; Sat, 18 Jun 2022 04:57:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231491AbiFREui (ORCPT ); Sat, 18 Jun 2022 00:50:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229478AbiFREuh (ORCPT ); Sat, 18 Jun 2022 00:50:37 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id EDB3F50079 for ; Fri, 17 Jun 2022 21:50:34 -0700 (PDT) Received: from linux.localdomain (unknown [113.200.148.30]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dx70yXWa1icBlKAA--.14762S2; Sat, 18 Jun 2022 12:50:32 +0800 (CST) From: Tiezhu Yang To: Huacai Chen , WANG Xuerui Cc: Xuefeng Li , linux-kernel@vger.kernel.org Subject: [PATCH] LoongArch: Fix wrong fpu version Date: Sat, 18 Jun 2022 12:50:31 +0800 Message-Id: <1655527831-3661-1-git-send-email-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.1.0 X-CM-TRANSID: AQAAf9Dx70yXWa1icBlKAA--.14762S2 X-Coremail-Antispam: 1UD129KBjvdXoWrZFyfWw48ZF1xuw15JrWkJFb_yoWkGFb_ur nrKa1rWFW8J3ZF9w1Yga1fGr13ua18WF1FyF4xCw4xJ345Gr1YqrsFk3W3ArZ8KFWDZrs0 q3y09asxZa1jgjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbcxFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Jr0_ Gr1l84ACjcxK6I8E87Iv67AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv6xkF7I0E14v26r4j6r 4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY02Avz4vE14v_Gryl 42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJV WUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAK I48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r 4UMIIF0xvE42xK8VAvwI8IcIk0rVWrZr1j6s0DMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF 0xvEx4A2jsIEc7CjxVAFwI0_Jr0_GrUvcSsGvfC2KfnxnUUI43ZEXa7VUjoa0DUUUUU== X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" According to the configuration information accessible by the CPUCFG instruction in LoongArch Reference Manual [1], FP_ver is stored in bit [5: 3] of CPUCFG2, the current code to get fpu version is wrong, use CPUCFG2_FPVERS to fix it. [1] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.ht= ml Fixes: 628c3bb40e9a ("LoongArch: Add boot and setup routines") Signed-off-by: Tiezhu Yang --- arch/loongarch/kernel/cpu-probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-= probe.c index 6c87ea3..529ab8f4 100644 --- a/arch/loongarch/kernel/cpu-probe.c +++ b/arch/loongarch/kernel/cpu-probe.c @@ -263,7 +263,7 @@ void cpu_probe(void) =20 c->cputype =3D CPU_UNKNOWN; c->processor_id =3D read_cpucfg(LOONGARCH_CPUCFG0); - c->fpu_vers =3D (read_cpucfg(LOONGARCH_CPUCFG2) >> 3) & 0x3; + c->fpu_vers =3D (read_cpucfg(LOONGARCH_CPUCFG2) & CPUCFG2_FPVERS) >> = 3; =20 c->fpu_csr0 =3D FPU_CSR_RN; c->fpu_mask =3D FPU_CSR_RSVD; --=20 2.1.0