From mboxrd@z Thu Jan 1 00:00:00 1970 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 20EC01ADFFB; Mon, 1 Sep 2025 13:10:49 +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=1756732250; cv=none; b=JvNlFGMj6Mw60AlDyaQZEy7ftCtKcbjyg8dYpuONxAKjCvbyIrXcK1HDmll0I0O1PG2TKJVAOXGL0qn+esTGydgPqRBu+pFlKNHoREhSnyO6Sf+YFNEwYLHJcRZJbnMbMMpPfu2NVUXIC6NtwZVVFNyzopTBHYi5GMuTnEKPPCc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756732250; c=relaxed/simple; bh=VOxu8arS/s7gFRMCG19RKI+wB0Hc+6Kyu4sWG8FSmZ0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=IxX6lbnRQ5hNJt9T2XTWV568w8GBkxJNt4nnlq8nMs4NoRc77x95hE/L4A9yBvGxQFjxHkNVD+OZyYPVs50zGD2U+Jprh14iychFSi4HpV+8tM/I4gLoBHJxwzDqSqOswo8aFhB06RB6GjCVYTt4L+EQtdksow2wlvFLkGsv59w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=j4YsDfs0; 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="j4YsDfs0" Received: by smtp.kernel.org (Postfix) with ESMTPS id A16E2C2BCB7; Mon, 1 Sep 2025 13:10:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756732249; bh=VOxu8arS/s7gFRMCG19RKI+wB0Hc+6Kyu4sWG8FSmZ0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=j4YsDfs041pcEA4PsPM9Fv3cx+Fety1JSDdn80JTlpQfdfbDx49Pj5d73mfbToakx PgLya/HeSbiEPI6JiRWwnf1/+pAmv8a8iYyHCBp4Ds6IqCe4hIez3MU/eu+hu2SbYz lB4Gfs5Y6gmt4q60PKIgOXRBHP3WM5szwT1cuKL2dPIwcwbo6IwaMAPb7M6vbKuZPg afObqthiKmeuNnWe2LTyybg0Ox7TgWLw5aDYxA3PnhAkUwFQMdAsEPqIaAFdzVpS01 mAjgyzCoEp77jX8f+cQSGeAlXuVYIZcMVOt/vaDMeLJVmMQHLoFTN/48ISQ6HnWeAn I5XBnsB1pmvdQ== 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 8BCDDCA0FF0; Mon, 1 Sep 2025 13:10:49 +0000 (UTC) From: Simon Schuster via B4 Relay Date: Mon, 01 Sep 2025 15:09:53 +0200 Subject: [PATCH v2 4/4] nios2: implement architecture-specific portion of sys_clone3 Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250901-nios2-implement-clone3-v2-4-53fcf5577d57@siemens-energy.com> References: <20250901-nios2-implement-clone3-v2-0-53fcf5577d57@siemens-energy.com> In-Reply-To: <20250901-nios2-implement-clone3-v2-0-53fcf5577d57@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 , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Guo Ren , Oleg Nesterov , Jens Axboe , Alexander Viro , Jan Kara , Tejun Heo , Johannes Weiner , =?utf-8?q?Michal_Koutn=C3=BD?= , Paul Moore , Serge Hallyn , James Morris , "Serge E. Hallyn" , Anna-Maria Behnsen , Frederic Weisbecker , Thomas Gleixner , Masami Hiramatsu , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Mathieu Desnoyers , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , John Johansen , Stephen Smalley , Ondrej Mosnacek , Kentaro Takeda , Tetsuo Handa , Richard Henderson , Matt Turner , Vineet Gupta , Russell King , Catalin Marinas , Will Deacon , Brian Cain , Huacai Chen , WANG Xuerui , Geert Uytterhoeven , Michal Simek , Thomas Bogendoerfer , Jonas Bonn , Stefan Kristiansson , Stafford Horne , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , Andreas Larsson , Richard Weinberger , Anton Ivanov , Johannes Berg , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Chris Zankel , Max Filippov Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-csky@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, linux-trace-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-perf-users@vger.kernel.org, apparmor@lists.ubuntu.com, selinux@vger.kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, Simon Schuster X-Mailer: b4 0.14.3-dev-2ce6c X-Developer-Signature: v=1; a=ed25519-sha256; t=1756732247; l=2260; i=schuster.simon@siemens-energy.com; s=20250818; h=from:subject:message-id; bh=af84J4YQt0c2u1+xik140Isbk9cuIhCMOLjW6thJwsY=; b=d7NLA1iQDxLQGisMH0KtrKIUv8tslRZQ31+BK5A9IfF7XRRqtN0/NtBHPN1763CSVsp/AaVUs Xc5SawZJT/gDUL4ePU56689mSaXuGDc8R0/3KXZ7O8sV4jJB/D/Z4M0 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 entry point 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/syscalls.h index b4d4ed3bf9c8..0e214b0a0ac8 100644 --- a/arch/nios2/include/asm/syscalls.h +++ b/arch/nios2/include/asm/syscalls.h @@ -7,6 +7,7 @@ int sys_cacheflush(unsigned long addr, unsigned long len, unsigned int op); +asmlinkage long __sys_clone3(struct clone_args __user *uargs, size_t size); #include diff --git a/arch/nios2/include/asm/unistd.h b/arch/nios2/include/asm/unistd.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 -#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 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, native) #define sys_mmap2 sys_mmap_pgoff +#define sys_clone3 __sys_clone3 void *sys_call_table[__NR_syscalls] = { [0 ... __NR_syscalls-1] = sys_ni_syscall, -- 2.39.5