From patchwork Wed Oct 9 10:50:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 13828153 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 C212B18E028; Wed, 9 Oct 2024 10:57:20 +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=1728471442; cv=none; b=SN7QPOCo5PmtE8MFaxtBdso6nCpBL3OU6T0Go3ooVpWzfnXfUMuYMlXGvWO8OuWLrG+Tten494jGkmJFN/1WkTedepvp9YHozP2X8oo9TSg69JRpfa+RAza/CauGDJoSu6BIQFgA2iohnSKjbNe2gWqkB5Ws3x5lf49oG2EX4Fc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728471442; c=relaxed/simple; bh=yW0IdweyOm15doJLVg/h0S2faD8U88AwBF3+5UhkGY8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lIAdS/IDPqrXdQ8DwVEDGAUI+L3VbQYtQrleWB8sRFxB41fmBarJp9qY6PmCG92aW6FfVtAdIUzQBNUA4dobC+e11d8jz0Lk+crfyW7mP8xJBI1UpgImAiDAnY4I/gFibO8TL5aUYMddXRGgAI/NDL0L1CxCNbetbOoFbNnmGy4= 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=Bz++JAuD; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=L9sUCqac; 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="Bz++JAuD"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="L9sUCqac" From: Sebastian Andrzej Siewior DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1728471438; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rMLrliO9lAbb+dJaG2LlaA1SSyEScnNEwlBTF2eF/dI=; b=Bz++JAuDWa3PCULVNbkOYe1NjQAHb4suiUw5KTd/ClMg2LC9b4aJWPRfiNJQwwMvYC+7+Z sl5n5YodQ97tWyKw7NX3aFQRiKq7Uc6rDHfWIlTxb+PHEhQBp+0bFdwqVoP0E7QpkgcLJp U75G3FwnqTQYnAuPn5EijoupkIYyqHIkvk8zVoaRQPlIl7TkpjTwZBR22KVvdEycX6ARYz Lk6X/s5WyK5/YmaogR6qSgTvjremFTMpAN5aR/+hUpsluY/ljxxCOP3eqearkzfpkVKHBA u+2ar/ejibmt6Dw+lrjGipJQAwd0a9Yb6T06ZQ0TfULLidwH2EWMrBM1NIW9eQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1728471438; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rMLrliO9lAbb+dJaG2LlaA1SSyEScnNEwlBTF2eF/dI=; b=L9sUCqacxH9ZpLdofZVOeTpbD/iXzqiub6ab3qtt8TLPPEQnO4gfx+F15rOYfvQDrwZAux DKTF505J55Kk/XCw== To: linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Peter Zijlstra , tglx@linutronix.de, mingo@kernel.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, ankur.a.arora@oracle.com, efault@gmx.de, Masami Hiramatsu , Mathieu Desnoyers , Jisheng Zhang , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, Sebastian Andrzej Siewior Subject: [PATCH 3/3] riscv: add PREEMPT_LAZY support Date: Wed, 9 Oct 2024 12:50:57 +0200 Message-ID: <20241009105709.887510-4-bigeasy@linutronix.de> In-Reply-To: <20241009105709.887510-1-bigeasy@linutronix.de> References: <20241009105709.887510-1-bigeasy@linutronix.de> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Jisheng Zhang riscv has switched to GENERIC_ENTRY, so adding PREEMPT_LAZY is as simple as adding TIF_NEED_RESCHED_LAZY related definitions and enabling ARCH_HAS_PREEMPT_LAZY. [bigeasy: Replace old PREEMPT_AUTO bits with new PREEMPT_LAZY ] Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: linux-riscv@lists.infradead.org Signed-off-by: Jisheng Zhang Signed-off-by: Sebastian Andrzej Siewior Acked-by: Palmer Dabbelt --- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/thread_info.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 62545946ecf43..3516c58480612 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -39,6 +39,7 @@ config RISCV select ARCH_HAS_MMIOWB select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PMEM_API + select ARCH_HAS_PREEMPT_LAZY select ARCH_HAS_PREPARE_SYNC_CORE_CMD select ARCH_HAS_PTE_DEVMAP if 64BIT && MMU select ARCH_HAS_PTE_SPECIAL diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 9c10fb180f438..8b5a5ddea4293 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -107,6 +107,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); * - pending work-to-be-done flags are in lowest half-word * - other flags in upper half-word(s) */ +#define TIF_NEED_RESCHED_LAZY 0 /* Lazy rescheduling needed */ #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ @@ -117,6 +118,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); #define TIF_32BIT 11 /* compat-mode 32bit process */ #define TIF_RISCV_V_DEFER_RESTORE 12 /* restore Vector before returing to user */ +#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)