From nobody Sat Oct 4 03:04:07 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94DE33054E0 for ; Thu, 21 Aug 2025 11:27:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755775665; cv=none; b=cr2Y2xQBcFpaAkw1U++oTNCMh747CiprQyo/MoDV0DnKhMIYsVkpi0VkPeLfh/3rdab2gs8wJfh6as2wXciWERIQucWkORBXzn6OTJAdNfmRIUM2t397IEMLmFfDVNfm+gtGdzAznvtL66NDBBk5w82XMkjILrPj/rqSU2F9gUw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755775665; c=relaxed/simple; bh=TeLiY9rWYgwluzznmA5sBvokJ7kYB4xX6yAp004tkOU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WIA6O9+buFE7quN6a9vkaXyNVxxl8oMgTzrbgeRb6SvhjPiLGBm6g1/HKjHtest3G8K0QUP5RI3Wyulst59Xz3OrLnqqqBVmjgG8RlGlHirvi2RDoXBlLseyNZlFiFdaw7ts3Le6BrPc/d65YNC28pWCG+4PlxZdnDfi2Ww6Q/Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uaHLmxt2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="uaHLmxt2" Received: by smtp.kernel.org (Postfix) with ESMTPS id 3263AC4AF0D; Thu, 21 Aug 2025 11:27:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755775665; bh=TeLiY9rWYgwluzznmA5sBvokJ7kYB4xX6yAp004tkOU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=uaHLmxt2ngLqc4XdyTaJFkv9X9g0lcA5Z9u5bJc2CKTFebgLtws/IxWUVYTB4/he7 KwHF8rvP2jP7Cszdmgi0gpDM0++ZDDp2wv3LAZ8X1Bf2O3/8yDbPNg7xpCYsA49fC2 yJ+TFi4wXMdPFswab+cKObwNqr/QBh/LBi73aYWIoxAQ29Giyw1b1I/aN2rdCYyjK4 mEcrKGwlrqCgGTqQnZkS9GVJ1yF7awn2q6FB2HEFtDboM/pQgj959x8aZRXyPSvOc2 V//jTV3J5SdSAiwWV/w4IK5NZ86BduJ2huSiJ3wsVCmjkykQ8pmWKRyeztfGpCP5/Z nlaOOZwUWPtpQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22A42CA0EF8; Thu, 21 Aug 2025 11:27:45 +0000 (UTC) From: Simon Schuster via B4 Relay Date: Thu, 21 Aug 2025 13:27:38 +0200 Subject: [PATCH 2/2] nios2: implement architecture-specific portion of sys_clone3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250821-nios2-implement-clone3-v1-2-1bb24017376a@siemens-energy.com> References: <20250821-nios2-implement-clone3-v1-0-1bb24017376a@siemens-energy.com> In-Reply-To: <20250821-nios2-implement-clone3-v1-0-1bb24017376a@siemens-energy.com> To: Dinh Nguyen , Christian Brauner , Arnd Bergmann , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Kees Cook Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Simon Schuster X-Mailer: b4 0.14.3-dev-2ce6c X-Developer-Signature: v=1; a=ed25519-sha256; t=1755775663; l=2259; i=schuster.simon@siemens-energy.com; s=20250818; h=from:subject:message-id; bh=ZGFd7PEXdNZQ3XvGm96hBqrgf0z3Sn12r48TmNzThTY=; b=F2nKl2igsmfyyDF/eUV0oYb5mlZJyimIpk0NXRJVrpnKfItiOUjRR+lvhtzDMtKjVJKvuPs+u 3hz69QALEOGCg5dAKDF1klwR3WkvjnC1lV0TyZQ2blO79aj8xnAMWyK X-Developer-Key: i=schuster.simon@siemens-energy.com; a=ed25519; pk=PUhOMiSp43aSeRE1H41KApxYOluamBFFiMfKlBjocvo= X-Endpoint-Received: by B4 Relay for schuster.simon@siemens-energy.com/20250818 with auth_id=495 X-Original-From: Simon Schuster Reply-To: schuster.simon@siemens-energy.com From: Simon Schuster This commit adds the sys_clone3 entrypoint for nios2. An architecture-specific wrapper (__sys_clone3) is required to save and restore additional registers to the kernel stack via SAVE_SWITCH_STACK and RESTORE_SWITCH_STACK. Signed-off-by: Simon Schuster --- arch/nios2/include/asm/syscalls.h | 1 + arch/nios2/include/asm/unistd.h | 2 -- arch/nios2/kernel/entry.S | 6 ++++++ arch/nios2/kernel/syscall_table.c | 1 + 4 files changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/nios2/include/asm/syscalls.h b/arch/nios2/include/asm/sys= calls.h index b4d4ed3bf9c8..0e214b0a0ac8 100644 --- a/arch/nios2/include/asm/syscalls.h +++ b/arch/nios2/include/asm/syscalls.h @@ -7,6 +7,7 @@ =20 int sys_cacheflush(unsigned long addr, unsigned long len, unsigned int op); +asmlinkage long __sys_clone3(struct clone_args __user *uargs, size_t size); =20 #include =20 diff --git a/arch/nios2/include/asm/unistd.h b/arch/nios2/include/asm/unist= d.h index 1146e56473c5..213f6de3cf7b 100644 --- a/arch/nios2/include/asm/unistd.h +++ b/arch/nios2/include/asm/unistd.h @@ -7,6 +7,4 @@ #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SET_GET_RLIMIT =20 -#define __ARCH_BROKEN_SYS_CLONE3 - #endif diff --git a/arch/nios2/kernel/entry.S b/arch/nios2/kernel/entry.S index 99f0a65e6234..dd40dfd908e5 100644 --- a/arch/nios2/kernel/entry.S +++ b/arch/nios2/kernel/entry.S @@ -403,6 +403,12 @@ ENTRY(sys_clone) addi sp, sp, 4 RESTORE_SWITCH_STACK ret +/* long syscall(SYS_clone3, struct clone_args *cl_args, size_t size); */ +ENTRY(__sys_clone3) + SAVE_SWITCH_STACK + call sys_clone3 + RESTORE_SWITCH_STACK + ret =20 ENTRY(sys_rt_sigreturn) SAVE_SWITCH_STACK diff --git a/arch/nios2/kernel/syscall_table.c b/arch/nios2/kernel/syscall_= table.c index 434694067d8f..c99818aac9e1 100644 --- a/arch/nios2/kernel/syscall_table.c +++ b/arch/nios2/kernel/syscall_table.c @@ -13,6 +13,7 @@ #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, nat= ive) =20 #define sys_mmap2 sys_mmap_pgoff +#define sys_clone3 __sys_clone3 =20 void *sys_call_table[__NR_syscalls] =3D { [0 ... __NR_syscalls-1] =3D sys_ni_syscall, --=20 2.39.5