From nobody Mon Feb 9 20:00:15 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 49F50264FB8 for ; Tue, 8 Apr 2025 09:29:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744104556; cv=none; b=a9DmWg/psWdtZWB/5DZhatWEiousqlq6GVU/2ZbcZMSUW/NHFBXn4gxoxzzYqblpMA4U3JD/DgVgNddhCKxB7WgGiup//sDbRFTlp3VEiImBIVhRi+bJKbBZbpouTFtJhGx+Wthprl596EcQJOj6PYy7+ATMgflhNP/ThTkBAd8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744104556; c=relaxed/simple; bh=hXwghIbYaI9OMHcN+QAQSNVkjiUy08hKNKzDfZ3Gzqc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=AZrdf+/X2IzVex4OK8J+yNvn1L3Qg8LZCGJ5eh6xBeD4sQqKeYpNy1rbFJ+I66pg5dPyibmuK4IUl6d6PdQIs/KhB54KPnKeYsGrKMqRA8541vCwlgEkmac2FiGRrPQLO2/kDNRStdNRmqlIvpm2G+tT8AUmzyGEM5VS6m80Yyc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [113.200.148.30]) by gateway (Coremail) with SMTP id _____8DxvnNn7PRndBC1AA--.6599S3; Tue, 08 Apr 2025 17:29:11 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowMDxPcVm7PRno350AA--.18853S2; Tue, 08 Apr 2025 17:29:10 +0800 (CST) From: Tiezhu Yang To: Huacai Chen Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] LoongArch: Handle fp, lsx, lasx and lbt assembly symbols Date: Tue, 8 Apr 2025 17:29:07 +0800 Message-ID: <20250408092907.22856-1-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMDxPcVm7PRno350AA--.18853S2 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj93XoW3JF4rtw48CFyxKw4Dur1rGrX_yoWxAw43pr nrArn7Cw48GFnav34DXa4jvFZxXas8GF1S93Wqy34fCr1j9r9rurn3Ga1qvFyUKa48Ar4F 9r4avFySyFyUC3cCm3ZEXasCq-sJn29KB7ZKAUJUUUU8529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUkjb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Jr0_Gr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0cIa020Ex4CE44I27wAqx4 xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JF0_Jw1lYx0Ex4A2jsIE14v2 6r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x0EwI xGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jrv_JF1lIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k2 6cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxV AFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07jOb18UUUUU= Content-Type: text/plain; charset="utf-8" Like the other relevant symbols, export some fp, lsx, lasx and lbt assembly symbols and put the function declarations in header files rather than source files. Cc: stable@vger.kernel.org # 6.6+ Signed-off-by: Tiezhu Yang --- arch/loongarch/include/asm/fpu.h | 6 ++++++ arch/loongarch/include/asm/lbt.h | 4 ++++ arch/loongarch/kernel/fpu.S | 6 ++++++ arch/loongarch/kernel/lbt.S | 4 ++++ arch/loongarch/kernel/signal.c | 21 --------------------- 5 files changed, 20 insertions(+), 21 deletions(-) diff --git a/arch/loongarch/include/asm/fpu.h b/arch/loongarch/include/asm/= fpu.h index 3177674228f8..52efb2f4df1c 100644 --- a/arch/loongarch/include/asm/fpu.h +++ b/arch/loongarch/include/asm/fpu.h @@ -28,16 +28,22 @@ extern void kernel_fpu_end(void); extern void _init_fpu(unsigned int); extern void _save_fp(struct loongarch_fpu *); extern void _restore_fp(struct loongarch_fpu *); +extern int _save_fp_context(void __user *fpregs, void __user *fcc, void __= user *csr); +extern int _restore_fp_context(void __user *fpregs, void __user *fcc, void= __user *csr); =20 extern void _save_lsx(struct loongarch_fpu *fpu); extern void _restore_lsx(struct loongarch_fpu *fpu); extern void _init_lsx_upper(void); extern void _restore_lsx_upper(struct loongarch_fpu *fpu); +extern int _save_lsx_context(void __user *fpregs, void __user *fcc, void _= _user *fcsr); +extern int _restore_lsx_context(void __user *fpregs, void __user *fcc, voi= d __user *fcsr); =20 extern void _save_lasx(struct loongarch_fpu *fpu); extern void _restore_lasx(struct loongarch_fpu *fpu); extern void _init_lasx_upper(void); extern void _restore_lasx_upper(struct loongarch_fpu *fpu); +extern int _save_lasx_context(void __user *fpregs, void __user *fcc, void = __user *fcsr); +extern int _restore_lasx_context(void __user *fpregs, void __user *fcc, vo= id __user *fcsr); =20 static inline void enable_lsx(void); static inline void disable_lsx(void); diff --git a/arch/loongarch/include/asm/lbt.h b/arch/loongarch/include/asm/= lbt.h index e671978bf552..24a9ee232fee 100644 --- a/arch/loongarch/include/asm/lbt.h +++ b/arch/loongarch/include/asm/lbt.h @@ -15,6 +15,10 @@ extern void _init_lbt(void); extern void _save_lbt(struct loongarch_lbt *); extern void _restore_lbt(struct loongarch_lbt *); +extern int _save_lbt_context(void __user *regs, void __user *eflags); +extern int _restore_lbt_context(void __user *regs, void __user *eflags); +extern int _save_ftop_context(void __user *ftop); +extern int _restore_ftop_context(void __user *ftop); =20 static inline int is_lbt_enabled(void) { diff --git a/arch/loongarch/kernel/fpu.S b/arch/loongarch/kernel/fpu.S index 6ab640101457..28caf416ae36 100644 --- a/arch/loongarch/kernel/fpu.S +++ b/arch/loongarch/kernel/fpu.S @@ -458,6 +458,7 @@ SYM_FUNC_START(_save_fp_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_save_fp_context) +EXPORT_SYMBOL_GPL(_save_fp_context) =20 /* * a0: fpregs @@ -471,6 +472,7 @@ SYM_FUNC_START(_restore_fp_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_restore_fp_context) +EXPORT_SYMBOL_GPL(_restore_fp_context) =20 /* * a0: fpregs @@ -484,6 +486,7 @@ SYM_FUNC_START(_save_lsx_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_save_lsx_context) +EXPORT_SYMBOL_GPL(_save_lsx_context) =20 /* * a0: fpregs @@ -497,6 +500,7 @@ SYM_FUNC_START(_restore_lsx_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_restore_lsx_context) +EXPORT_SYMBOL_GPL(_restore_lsx_context) =20 /* * a0: fpregs @@ -510,6 +514,7 @@ SYM_FUNC_START(_save_lasx_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_save_lasx_context) +EXPORT_SYMBOL_GPL(_save_lasx_context) =20 /* * a0: fpregs @@ -523,6 +528,7 @@ SYM_FUNC_START(_restore_lasx_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_restore_lasx_context) +EXPORT_SYMBOL_GPL(_restore_lasx_context) =20 .L_fpu_fault: li.w a0, -EFAULT # failure diff --git a/arch/loongarch/kernel/lbt.S b/arch/loongarch/kernel/lbt.S index 001f061d226a..71678912d24c 100644 --- a/arch/loongarch/kernel/lbt.S +++ b/arch/loongarch/kernel/lbt.S @@ -90,6 +90,7 @@ SYM_FUNC_START(_save_lbt_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_save_lbt_context) +EXPORT_SYMBOL_GPL(_save_lbt_context) =20 /* * a0: scr @@ -110,6 +111,7 @@ SYM_FUNC_START(_restore_lbt_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_restore_lbt_context) +EXPORT_SYMBOL_GPL(_restore_lbt_context) =20 /* * a0: ftop @@ -120,6 +122,7 @@ SYM_FUNC_START(_save_ftop_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_save_ftop_context) +EXPORT_SYMBOL_GPL(_save_ftop_context) =20 /* * a0: ftop @@ -150,6 +153,7 @@ SYM_FUNC_START(_restore_ftop_context) li.w a0, 0 # success jr ra SYM_FUNC_END(_restore_ftop_context) +EXPORT_SYMBOL_GPL(_restore_ftop_context) =20 .L_lbt_fault: li.w a0, -EFAULT # failure diff --git a/arch/loongarch/kernel/signal.c b/arch/loongarch/kernel/signal.c index 7a555b600171..4740cb5b2388 100644 --- a/arch/loongarch/kernel/signal.c +++ b/arch/loongarch/kernel/signal.c @@ -51,27 +51,6 @@ #define lock_lbt_owner() ({ preempt_disable(); pagefault_disable(); }) #define unlock_lbt_owner() ({ pagefault_enable(); preempt_enable(); }) =20 -/* Assembly functions to move context to/from the FPU */ -extern asmlinkage int -_save_fp_context(void __user *fpregs, void __user *fcc, void __user *csr); -extern asmlinkage int -_restore_fp_context(void __user *fpregs, void __user *fcc, void __user *cs= r); -extern asmlinkage int -_save_lsx_context(void __user *fpregs, void __user *fcc, void __user *fcsr= ); -extern asmlinkage int -_restore_lsx_context(void __user *fpregs, void __user *fcc, void __user *f= csr); -extern asmlinkage int -_save_lasx_context(void __user *fpregs, void __user *fcc, void __user *fcs= r); -extern asmlinkage int -_restore_lasx_context(void __user *fpregs, void __user *fcc, void __user *= fcsr); - -#ifdef CONFIG_CPU_HAS_LBT -extern asmlinkage int _save_lbt_context(void __user *regs, void __user *ef= lags); -extern asmlinkage int _restore_lbt_context(void __user *regs, void __user = *eflags); -extern asmlinkage int _save_ftop_context(void __user *ftop); -extern asmlinkage int _restore_ftop_context(void __user *ftop); -#endif - struct rt_sigframe { struct siginfo rs_info; struct ucontext rs_uctx; --=20 2.42.0