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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,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 7AD97C64E7A for ; Sat, 28 Nov 2020 14:53:55 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C677124689 for ; Sat, 28 Nov 2020 14:53:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="M9XcYXM6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C677124689 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4CjvdY032VzDrNM for ; Sun, 29 Nov 2020 01:53:53 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::644; helo=mail-pl1-x644.google.com; envelope-from=npiggin@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=M9XcYXM6; dkim-atps=neutral Received: from mail-pl1-x644.google.com (mail-pl1-x644.google.com [IPv6:2607:f8b0:4864:20::644]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4CjvMQ3s57zDsGv for ; Sun, 29 Nov 2020 01:41:38 +1100 (AEDT) Received: by mail-pl1-x644.google.com with SMTP id x4so2319668pln.8 for ; Sat, 28 Nov 2020 06:41:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=EEx+v78bxX7ip5MB5LrvbtkDrNTgl+f+WgHGvGOpR74=; b=M9XcYXM6EO/T8EwgIstlxU/1qztA+Z3Ssmt8X8QubngOgDpm+MFSiHc1b08Zo8gEDx CxdHRq5bAIm7kfXX29AnfHezFdBlguvixM1y5C8+MUu3fdtwfzBesZ3428PTs1Tu6yuZ PtODcNEi9X50EapkcCp8kOkwhhMIW5rRV9B9ru4sVojqLj0gRkjbNsHxXExrWvGBzk/l 1nCC6ukWpWdSBnEozvPYvT1F87XZherfyTTu8toXHfxd1edyP1nv8Fq+AVnw9miMiOEP w71Be1S/rl0iFA5BaYpVBQKdoEvwhw9kvBvxC0h5XUgNOudUGv331VV+xNm8ZebYCGWc T03Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=EEx+v78bxX7ip5MB5LrvbtkDrNTgl+f+WgHGvGOpR74=; b=hPVWSZfJrwpKRbltmFJ4F9yYPgDNj3dQNVf+SgHZhwqaHz/mftRHsm68g0D9DAW4D/ LEUnyLKb51+O5mIJHQ7aaiMr6cx33vqdJGaxkkG9RnqfwSaaX+QyHu03CKRq8jS9A+4Z pQbrq+nsc6BMduktWCCWpMaX2GjvKBbdvwD26AkUGMSxc0vQEA6KKBB4tYESSuCQrClG J6QUILtDyDfUEyQkihEmylKXsDVkHJyC8hlqn1vvBWeowxJf+gfaB3kicNV5xaPyNvH/ 9g4IKvT9Hpb6WPIak7VN+aML4o0d2wd1JKvJFoRnB9xI+mbmNQJr5GMAcb6vPudNApqB 92yg== X-Gm-Message-State: AOAM530yTLd+1PfhBTI0lP/WkqSE7NobSwkBsqFcTFaHckYOTHMSUgGM 1uk1N326gLi+2s+UzhTo1uHVI0+VH/Q= X-Google-Smtp-Source: ABdhPJyhA6MF90WvFaFjAZ0mF6+E1JP81JWAk0divIYkioK1SXMeIRXiD0+Hu/zzgLu6XF4ZLkRrCQ== X-Received: by 2002:a17:902:854a:b029:da:113b:2d3f with SMTP id d10-20020a170902854ab02900da113b2d3fmr11622502plo.49.1606574495502; Sat, 28 Nov 2020 06:41:35 -0800 (PST) Received: from bobo.ozlabs.ibm.com (193-116-103-132.tpgi.com.au. [193.116.103.132]) by smtp.gmail.com with ESMTPSA id y201sm10750764pfb.2.2020.11.28.06.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Nov 2020 06:41:35 -0800 (PST) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v3 06/19] powerpc: add interrupt wrapper entry / exit stub functions Date: Sun, 29 Nov 2020 00:41:01 +1000 Message-Id: <20201128144114.944000-7-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20201128144114.944000-1-npiggin@gmail.com> References: <20201128144114.944000-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nicholas Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" These will be used by subsequent patches. Signed-off-by: Nicholas Piggin --- arch/powerpc/include/asm/interrupt.h | 66 ++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h index 5f6eeb6d43f2..516b32f5b3cc 100644 --- a/arch/powerpc/include/asm/interrupt.h +++ b/arch/powerpc/include/asm/interrupt.h @@ -5,6 +5,50 @@ #include #include +struct interrupt_state { +}; + +static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrupt_state *state) +{ +} + +/* + * Care should be taken to note that interrupt_exit_prepare and + * interrupt_async_exit_prepare do not necessarily return immediately to + * regs context (e.g., if regs is usermode, we don't necessarily return to + * user mode). Other interrupts might be taken between here and return, + * context switch / preemption may occur in the exit path after this, or a + * signal may be delivered, etc. + * + * The real interrupt exit code is platform specific, e.g., + * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s. + * + * However interrupt_nmi_exit_prepare does return directly to regs, because + * NMIs do not do "exit work" or replay soft-masked interrupts. + */ +static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt_state *state) +{ +} + +static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state) +{ +} + +static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct interrupt_state *state) +{ +} + +struct interrupt_nmi_state { +}; + +static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state) +{ +} + +static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state) +{ +} + /** * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function * @func: Function name of the entry point @@ -59,7 +103,13 @@ static __always_inline void ___##func(struct pt_regs *regs); \ \ __visible noinstr void func(struct pt_regs *regs) \ { \ + struct interrupt_state state; \ + \ + interrupt_enter_prepare(regs, &state); \ + \ ___##func (regs); \ + \ + interrupt_exit_prepare(regs, &state); \ } \ \ static __always_inline void ___##func(struct pt_regs *regs) @@ -87,10 +137,15 @@ static __always_inline long ___##func(struct pt_regs *regs); \ \ __visible noinstr long func(struct pt_regs *regs) \ { \ + struct interrupt_state state; \ long ret; \ \ + interrupt_enter_prepare(regs, &state); \ + \ ret = ___##func (regs); \ \ + interrupt_exit_prepare(regs, &state); \ + \ return ret; \ } \ \ @@ -117,7 +172,13 @@ static __always_inline void ___##func(struct pt_regs *regs); \ \ __visible noinstr void func(struct pt_regs *regs) \ { \ + struct interrupt_state state; \ + \ + interrupt_async_enter_prepare(regs, &state); \ + \ ___##func (regs); \ + \ + interrupt_async_exit_prepare(regs, &state); \ } \ \ static __always_inline void ___##func(struct pt_regs *regs) @@ -145,10 +206,15 @@ static __always_inline long ___##func(struct pt_regs *regs); \ \ __visible noinstr long func(struct pt_regs *regs) \ { \ + struct interrupt_nmi_state state; \ long ret; \ \ + interrupt_nmi_enter_prepare(regs, &state); \ + \ ret = ___##func (regs); \ \ + interrupt_nmi_exit_prepare(regs, &state); \ + \ return ret; \ } \ \ -- 2.23.0