From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 461E2C433EF for ; Mon, 20 Sep 2021 23:38:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2EBD960F48 for ; Mon, 20 Sep 2021 23:38:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233140AbhITXjs (ORCPT ); Mon, 20 Sep 2021 19:39:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:46998 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239852AbhITXhh (ORCPT ); Mon, 20 Sep 2021 19:37:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E2D356128E; Mon, 20 Sep 2021 23:32:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1632180772; bh=i26PstLc95ziXClQ5RoK+ExK60AsHTyUGJvC+QiRy/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GUfBxK5vCmL92p329EH00TPob+dL918GbcGmWQoa4Iga/S2QaGjEzyZihyR9hkFmT e3ZvxetMbvRBq/5/quYgesvqsB1d3XFM9MUR+4Ly5Naql9QZsHoQvXLjUFXIrbe/eZ 086JtdOF20sl+XvmTuNQru0qzA7VLJchAv4HziAsifjIP3QCyanU+MFr4AFUC/ByPV n3X0UT0d3tAYMGmyzlJ286ZyeaMeoR9tNeFl23DbiPL1hz67W4FOo6VUHX6mqlNZdY dUxkFN36FiKYORjJQe6qVNLzT1NGGQ2DJkO6pOmr2q5EdMINZWmE/ytfblTvKFd0W5 4huRF+Lr7UX2Q== From: Frederic Weisbecker To: Peter Zijlstra , Catalin Marinas , Will Deacon Cc: LKML , Frederic Weisbecker , Ard Biesheuvel , James Morse , Quentin Perret , Mark Rutland Subject: [PATCH 4/4] arm64: Implement HAVE_PREEMPT_DYNAMIC Date: Tue, 21 Sep 2021 01:32:37 +0200 Message-Id: <20210920233237.90463-5-frederic@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210920233237.90463-1-frederic@kernel.org> References: <20210920233237.90463-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide the static calls for the common preemption points and report arm64 ability to support dynamic preemption. Signed-off-by: Frederic Weisbecker Cc: Mark Rutland Cc: Quentin Perret Cc: Peter Zijlstra Cc: Catalin Marinas Cc: James Morse Cc: Will Deacon Cc: Ard Biesheuvel --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/preempt.h | 20 +++++++++++++++++--- 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 5b51b359ccda..e28bcca8954c 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -191,6 +191,7 @@ config ARM64 select HAVE_PERF_EVENTS select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP + select HAVE_PREEMPT_DYNAMIC select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_STATIC_CALL select HAVE_FUNCTION_ARG_ACCESS_API diff --git a/arch/arm64/include/asm/preempt.h b/arch/arm64/include/asm/preempt.h index 4fbbe644532f..69d1cc491d3b 100644 --- a/arch/arm64/include/asm/preempt.h +++ b/arch/arm64/include/asm/preempt.h @@ -82,15 +82,29 @@ static inline bool should_resched(int preempt_offset) #ifdef CONFIG_PREEMPTION void preempt_schedule(void); -#define __preempt_schedule() preempt_schedule() void preempt_schedule_notrace(void); -#define __preempt_schedule_notrace() preempt_schedule_notrace() -#endif /* CONFIG_PREEMPTION */ #ifdef CONFIG_PREEMPT_DYNAMIC + +#define __preempt_schedule_func preempt_schedule +DECLARE_STATIC_CALL(preempt_schedule, __preempt_schedule_func); +#define __preempt_schedule() static_call(preempt_schedule)() + +#define __preempt_schedule_notrace_func preempt_schedule_notrace +DECLARE_STATIC_CALL(preempt_schedule_notrace, __preempt_schedule_notrace_func); +#define __preempt_schedule_notrace() static_call(preempt_schedule_notrace)() + void arm64_preempt_schedule_irq(void); #define __irqentry_exit_cond_resched_func arm64_preempt_schedule_irq DECLARE_STATIC_CALL(irqentry_exit_cond_resched, __irqentry_exit_cond_resched_func); + +#else /* !CONFIG_PREEMPT_DYNAMIC */ + +#define __preempt_schedule() preempt_schedule() +#define __preempt_schedule_notrace() preempt_schedule_notrace() + #endif /* CONFIG_PREEMPT_DYNAMIC */ +#endif /* CONFIG_PREEMPTION */ + #endif /* __ASM_PREEMPT_H */ -- 2.25.1