From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 CC51022F16E; Thu, 24 Jul 2025 06:27:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753338442; cv=none; b=JRHY/f8qhYrkA1shHlaVE10E7fJ+ZnDN3hbMPNnmAyB2X3+dosKR8QGDArRxcTQysxixSKJsQhFPHDfOULsoSmCO7fvHQDSjeNWw+/CQHmjl+XUBuL4WRUgJzfIAr2ej3o9pQbGpBknAlnGUE275uGhKoHKPMZRHA0FgYQGz9N8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753338442; c=relaxed/simple; bh=SJRaOguhTl/Tk5XbsGGzu50TtmtYidsEXowjFzTGB/o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WTZpkFFqIGlzBxaeSyz22uYjCTWD2LhCPKT6yBj40NSnE2qUEnAmsdPytKrN7Y7jYyJnNWjKb0jwORjnr7BsXQ6i09trOTCygitiosIw7HezVf+GjGwZTcTDIln06YQfgC6j1C10+a2foXpFjVCQEcW86qoiYq1R3f+V5818kTk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=iAEej6fW; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=Mg7DFBAo; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="iAEej6fW"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Mg7DFBAo" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1753338438; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XEoztOX42ZPvrRbI5LNX79Yd84LWhBUqfG54KTkC4Qo=; b=iAEej6fWmcOQssTOgAk5MDHiBOhzb+waaX4CdBOk8/EXVBEuHBrR8xAXDvvaFv2w2wYqvY sb2v2j57Jl9YHSecWdDd1dzlIpEQS4MDwGrRVsfS9EMyRt7vRNqDkZLNNR6L5NYXnBIpMW 7pcYVPQ+4fpiURXJnIecf+ALRn81jhp1cfHrMBuIF7+T986DenACtFXJwuGUVZGr1Mu9Xy 8iSZ3OkFQ0Vx9IY9qxFzpCc4oE+D1GSNUN9phlsUo4LDUG0qVLbFufwhmljiPuOrKx3dQM BBASOHyabCmrAQN8l/EQEoIUheP1TW5MYyU06w1LA5eACYplIo3Gm8+G6uNG6A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1753338438; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XEoztOX42ZPvrRbI5LNX79Yd84LWhBUqfG54KTkC4Qo=; b=Mg7DFBAodTb0CfLowl9jfkZZhz3iqJqcWSuImLmEUzE5tC9SKDdLohK8U9TuuInZb3VRzD l8lLQkYYxYbdv0DA== Date: Thu, 24 Jul 2025 08:26:59 +0200 Subject: [PATCH RFC 09/14] sparc64: vdso: Introduce vdso/processor.h Precedence: bulk X-Mailing-List: sparclinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20250724-vdso-sparc64-generic-2-v1-9-e376a3bd24d1@linutronix.de> References: <20250724-vdso-sparc64-generic-2-v1-0-e376a3bd24d1@linutronix.de> In-Reply-To: <20250724-vdso-sparc64-generic-2-v1-0-e376a3bd24d1@linutronix.de> To: Andy Lutomirski , Thomas Gleixner , Vincenzo Frascino , Arnd Bergmann , Shuah Khan , "David S. Miller" , Andreas Larsson , Nagarathnam Muthusamy , Shannon Nelson , Nick Alcock , John Stultz , Stephen Boyd , John Paul Adrian Glaubitz Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, sparclinux@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1753338429; l=4619; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=SJRaOguhTl/Tk5XbsGGzu50TtmtYidsEXowjFzTGB/o=; b=SRgHP2PcpO/8x7wShc3O6C3oz5x5ERa75zhX15rL5m9vR4wGLa3iWm7oBcsqza0E4/1aqy8yp oVe1hbn9AHSCmIrlt1f5GC95hOmOj+1qO3EeL8kA74OYBCq23nzEyGL X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= The generic vDSO library expects a vdso/processor.h with an definition of cpu_relax(). Split out cpu_relax() into this dedicated header. Signed-off-by: Thomas Weißschuh --- arch/sparc/include/asm/processor.h | 3 +++ arch/sparc/include/asm/processor_32.h | 2 -- arch/sparc/include/asm/processor_64.h | 25 -------------------- arch/sparc/include/asm/vdso/processor.h | 41 +++++++++++++++++++++++++++++++++ 4 files changed, 44 insertions(+), 27 deletions(-) diff --git a/arch/sparc/include/asm/processor.h b/arch/sparc/include/asm/processor.h index 18295ea625dd7271617c15caa003a173099dd4d0..e34de956519aaca0e9bf82a22000d9096f868968 100644 --- a/arch/sparc/include/asm/processor.h +++ b/arch/sparc/include/asm/processor.h @@ -1,6 +1,9 @@ /* SPDX-License-Identifier: GPL-2.0 */ #ifndef ___ASM_SPARC_PROCESSOR_H #define ___ASM_SPARC_PROCESSOR_H + +#include + #if defined(__sparc__) && defined(__arch64__) #include #else diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h index ba8b70ffec085feb17de9050f37de98e0039f7c3..a074d313f4f80621c1bc42733529c6d9450b1275 100644 --- a/arch/sparc/include/asm/processor_32.h +++ b/arch/sparc/include/asm/processor_32.h @@ -91,8 +91,6 @@ unsigned long __get_wchan(struct task_struct *); extern struct task_struct *last_task_used_math; int do_mathemu(struct pt_regs *regs, struct task_struct *fpt); -#define cpu_relax() barrier() - extern void (*sparc_idle)(void); #endif diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h index 0a0d5c3d184c751d232a00e73357c0e345695a94..3de65ad6d78592013b1d1158a58497f3821d003c 100644 --- a/arch/sparc/include/asm/processor_64.h +++ b/arch/sparc/include/asm/processor_64.h @@ -182,31 +182,6 @@ unsigned long __get_wchan(struct task_struct *task); #define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc) #define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP]) -/* Please see the commentary in asm/backoff.h for a description of - * what these instructions are doing and how they have been chosen. - * To make a long story short, we are trying to yield the current cpu - * strand during busy loops. - */ -#ifdef BUILD_VDSO -#define cpu_relax() asm volatile("\n99:\n\t" \ - "rd %%ccr, %%g0\n\t" \ - "rd %%ccr, %%g0\n\t" \ - "rd %%ccr, %%g0\n\t" \ - ::: "memory") -#else /* ! BUILD_VDSO */ -#define cpu_relax() asm volatile("\n99:\n\t" \ - "rd %%ccr, %%g0\n\t" \ - "rd %%ccr, %%g0\n\t" \ - "rd %%ccr, %%g0\n\t" \ - ".section .pause_3insn_patch,\"ax\"\n\t"\ - ".word 99b\n\t" \ - "wr %%g0, 128, %%asr27\n\t" \ - "nop\n\t" \ - "nop\n\t" \ - ".previous" \ - ::: "memory") -#endif - /* Prefetch support. This is tuned for UltraSPARC-III and later. * UltraSPARC-I will treat these as nops, and UltraSPARC-II has * a shallower prefetch queue than later chips. diff --git a/arch/sparc/include/asm/vdso/processor.h b/arch/sparc/include/asm/vdso/processor.h new file mode 100644 index 0000000000000000000000000000000000000000..f7a9adc807f7c9a0444afa51aeb47649a9bdb079 --- /dev/null +++ b/arch/sparc/include/asm/vdso/processor.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _ASM_SPARC_VDSO_PROCESSOR_H +#define _ASM_SPARC_VDSO_PROCESSOR_H + +#include + +#if defined(__arch64__) + +/* Please see the commentary in asm/backoff.h for a description of + * what these instructions are doing and how they have been chosen. + * To make a long story short, we are trying to yield the current cpu + * strand during busy loops. + */ +#ifdef BUILD_VDSO +#define cpu_relax() asm volatile("\n99:\n\t" \ + "rd %%ccr, %%g0\n\t" \ + "rd %%ccr, %%g0\n\t" \ + "rd %%ccr, %%g0\n\t" \ + ::: "memory") +#else /* ! BUILD_VDSO */ +#define cpu_relax() asm volatile("\n99:\n\t" \ + "rd %%ccr, %%g0\n\t" \ + "rd %%ccr, %%g0\n\t" \ + "rd %%ccr, %%g0\n\t" \ + ".section .pause_3insn_patch,\"ax\"\n\t"\ + ".word 99b\n\t" \ + "wr %%g0, 128, %%asr27\n\t" \ + "nop\n\t" \ + "nop\n\t" \ + ".previous" \ + ::: "memory") +#endif /* BUILD_VDSO */ + +#else /* ! __arch64__ */ + +#define cpu_relax() barrier() + +#endif /* __arch64__ */ + +#endif /* _ASM_SPARC_VDSO_PROCESSOR_H */ -- 2.50.1