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=-15.8 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 85AEFC433E0 for ; Wed, 13 Jan 2021 07:51:24 +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 96E5B2311F for ; Wed, 13 Jan 2021 07:51:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 96E5B2311F 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 4DG04l0dV3zDrBl for ; Wed, 13 Jan 2021 18:51:19 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::42c; helo=mail-pf1-x42c.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=J+A4MsHl; dkim-atps=neutral Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) (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 4DFzgG5NtrzDqnV for ; Wed, 13 Jan 2021 18:32:42 +1100 (AEDT) Received: by mail-pf1-x42c.google.com with SMTP id 11so711334pfu.4 for ; Tue, 12 Jan 2021 23:32:42 -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=+OJkqpdAJc91EuEzmfn11XOLUqioGn3A8NHF4wCgm0M=; b=J+A4MsHlsJAxIqnr7JnUqllM7AmogY6enWNNqREry7/rWIo8A9PQVgvwWBgQ3E52uR S6EGFC7i/qs2OHU2kiUDWucj6D0ZByCVVJ6HoxZX6havL+g9Tt95nyef/WfPBjD9Vkq0 jM0Pgf+LNQjA+kAghS2+VBOWdjvsYHeOV9ufn72iksyqx2TiWFQSl+yMDd2ygNARpFLB 301L3fuqDrZw4J9rwMLuixR3squnqr/xgDJ1b62Puov2otCOlDxNypJKAYyZP0MdB1ui QYOXbY8iDNQYGyZqH7gWzC3uAgsVhJfWWL/Z6ZiOioLCkJSsPAFrw27BWerYyGYFNoax tgpA== 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=+OJkqpdAJc91EuEzmfn11XOLUqioGn3A8NHF4wCgm0M=; b=o6VtkJD4HddcFR0tSnu1VoOoByHDTW+8hQhTJ/u3JRQgnwfMFRSPgHrVkpdMAgY7r4 dFHTa1s4G3tE+68u8EXSXqPOP+34lNmn8HQqDitZKISlxsj3f2lBsHjeM5rPs4sup2OA Qb5MByfaC1//EdetJ07jV29WJcIzpb6gn0dBnE3DB4Z3Yn0AIkHUJX1A/jTqUGH+pEfc Z0jZJ+5K3lxVdJ6dUID2beyqCLHZPCVfDd3ldRFOTe2ADuIhS78Npr9qnRMsAuumlxs+ KCzNN2CTuaDQy0li+lQrPe7+N3mcwimw6UUT2UH702gSL1wiUfv1/E8FoUxmBArb036u 9dOw== X-Gm-Message-State: AOAM532Z1fN6YHp4Q8d7cMtI3Biz0zyi2QMNrlR7VEyLcis72O/Y5iS1 ERjL+nbshR3SAiQEHy6SjDlOp2SVGIo= X-Google-Smtp-Source: ABdhPJw8eNs63xKR6Sy3SfCsEdNgTMbNhVDHc4DrY1rQBq+nLF73BGsgZI3TOgH2OXJbh5vsLQwrmA== X-Received: by 2002:a63:4c4f:: with SMTP id m15mr916432pgl.54.1610523160592; Tue, 12 Jan 2021 23:32:40 -0800 (PST) Received: from bobo.ibm.com ([124.170.13.62]) by smtp.gmail.com with ESMTPSA id m77sm1394264pfd.105.2021.01.12.23.32.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jan 2021 23:32:40 -0800 (PST) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v5 07/21] powerpc: add interrupt wrapper entry / exit stub functions Date: Wed, 13 Jan 2021 17:32:01 +1000 Message-Id: <20210113073215.516986-8-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210113073215.516986-1-npiggin@gmail.com> References: <20210113073215.516986-1-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 60363e5eeffa..7c72c91c21ce 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 @@ -71,7 +115,13 @@ 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) @@ -99,10 +149,15 @@ 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; \ } \ \ @@ -129,7 +184,13 @@ 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) @@ -157,10 +218,15 @@ 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