From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 AA0BD1420A2; Tue, 27 Feb 2024 13:53:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709042038; cv=none; b=KfhwH1+n/oys1HkYK/8rCbEZambcwpPLXlsd1lZmBfpIzW9wYWHs/lJE0kbWaYSfF6O07SHfial2fYvicqDkiGyvSIfP8YGG25lO24mQjmBs6q2wjvJqpuKrefw9H9eil85TZ9fc5CoGwUEYxAQs+enCQd8pEfdoLk7ZgTKYSQ0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709042038; c=relaxed/simple; bh=NMiLemjLUQt/9mYnTy4qggHJPPto3Ln/M/VYRJuwMlI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eNmk3fO4pdtbnluml5kSpLK9zJ/l0lczqM8mmqz51At78znEIQYjb8HKeH1phuoY54pnG4xscLl+KmTv+LICd8EycLizA5XuEa51ZdCpznobkzsRsk3/teFi5EwhjPfYH5FSuczBHSXVapz86vTZSXEtqrsRjk6sAumOcFnqYhE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IbnvVAit; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="IbnvVAit" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34829C43390; Tue, 27 Feb 2024 13:53:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1709042038; bh=NMiLemjLUQt/9mYnTy4qggHJPPto3Ln/M/VYRJuwMlI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IbnvVAitW5PRAzUX9C5+JhsoHZV0+VTfh5QPTn35BeQdTAUNpYoqrgPZvcv+yT5aV DPo7cnAnuwclzJ3NY8H0BYtgU36hHffN1ZzsXk6PL+o62fG/EiZJUK3bHcvdzcmSqw D94DGIWft2DvRM0/2FyR8lqnl3Ly1PhND3fQ300s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Juergen Gross , Oleksandr Tyshchenko , Sasha Levin Subject: [PATCH 6.6 129/299] xen/events: remove some simple helpers from events_base.c Date: Tue, 27 Feb 2024 14:24:00 +0100 Message-ID: <20240227131630.011371260@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240227131625.847743063@linuxfoundation.org> References: <20240227131625.847743063@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Juergen Gross [ Upstream commit 3bdb0ac350fe5e6301562143e4573971dd01ae0b ] The helper functions type_from_irq() and cpu_from_irq() are just one line functions used only internally. Open code them where needed. At the same time modify and rename get_evtchn_to_irq() to return a struct irq_info instead of the IRQ number. Signed-off-by: Juergen Gross Reviewed-by: Oleksandr Tyshchenko Signed-off-by: Juergen Gross Stable-dep-of: fa765c4b4aed ("xen/events: close evtchn after mapping cleanup") Signed-off-by: Sasha Levin --- drivers/xen/events/events_base.c | 97 +++++++++++++------------------- 1 file changed, 38 insertions(+), 59 deletions(-) diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 57dfb512cdc5d..d3d7501628381 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -248,15 +248,6 @@ static int set_evtchn_to_irq(evtchn_port_t evtchn, unsigned int irq) return 0; } -static int get_evtchn_to_irq(evtchn_port_t evtchn) -{ - if (evtchn >= xen_evtchn_max_channels()) - return -1; - if (evtchn_to_irq[EVTCHN_ROW(evtchn)] == NULL) - return -1; - return READ_ONCE(evtchn_to_irq[EVTCHN_ROW(evtchn)][EVTCHN_COL(evtchn)]); -} - /* Get info for IRQ */ static struct irq_info *info_for_irq(unsigned irq) { @@ -274,6 +265,19 @@ static void set_info_for_irq(unsigned int irq, struct irq_info *info) irq_set_chip_data(irq, info); } +static struct irq_info *evtchn_to_info(evtchn_port_t evtchn) +{ + int irq; + + if (evtchn >= xen_evtchn_max_channels()) + return NULL; + if (evtchn_to_irq[EVTCHN_ROW(evtchn)] == NULL) + return NULL; + irq = READ_ONCE(evtchn_to_irq[EVTCHN_ROW(evtchn)][EVTCHN_COL(evtchn)]); + + return (irq < 0) ? NULL : info_for_irq(irq); +} + /* Per CPU channel accounting */ static void channels_on_cpu_dec(struct irq_info *info) { @@ -429,7 +433,9 @@ static evtchn_port_t evtchn_from_irq(unsigned int irq) unsigned int irq_from_evtchn(evtchn_port_t evtchn) { - return get_evtchn_to_irq(evtchn); + struct irq_info *info = evtchn_to_info(evtchn); + + return info ? info->irq : -1; } EXPORT_SYMBOL_GPL(irq_from_evtchn); @@ -473,25 +479,11 @@ static unsigned pirq_from_irq(unsigned irq) return info->u.pirq.pirq; } -static enum xen_irq_type type_from_irq(unsigned irq) -{ - return info_for_irq(irq)->type; -} - -static unsigned cpu_from_irq(unsigned irq) -{ - return info_for_irq(irq)->cpu; -} - unsigned int cpu_from_evtchn(evtchn_port_t evtchn) { - int irq = get_evtchn_to_irq(evtchn); - unsigned ret = 0; - - if (irq != -1) - ret = cpu_from_irq(irq); + struct irq_info *info = evtchn_to_info(evtchn); - return ret; + return info ? info->cpu : 0; } static void do_mask(struct irq_info *info, u8 reason) @@ -540,13 +532,12 @@ static bool pirq_needs_eoi_flag(unsigned irq) static void bind_evtchn_to_cpu(evtchn_port_t evtchn, unsigned int cpu, bool force_affinity) { - int irq = get_evtchn_to_irq(evtchn); - struct irq_info *info = info_for_irq(irq); + struct irq_info *info = evtchn_to_info(evtchn); - BUG_ON(irq == -1); + BUG_ON(info == NULL); if (IS_ENABLED(CONFIG_SMP) && force_affinity) { - struct irq_data *data = irq_get_irq_data(irq); + struct irq_data *data = irq_get_irq_data(info->irq); irq_data_update_affinity(data, cpumask_of(cpu)); irq_data_update_effective_affinity(data, cpumask_of(cpu)); @@ -979,13 +970,13 @@ static void __unbind_from_irq(unsigned int irq) } if (VALID_EVTCHN(evtchn)) { - unsigned int cpu = cpu_from_irq(irq); + unsigned int cpu = info->cpu; struct xenbus_device *dev; if (!info->is_static) xen_evtchn_close(evtchn); - switch (type_from_irq(irq)) { + switch (info->type) { case IRQT_VIRQ: per_cpu(virq_to_irq, cpu)[virq_from_irq(irq)] = -1; break; @@ -1208,15 +1199,16 @@ static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip, { int irq; int ret; + struct irq_info *info; if (evtchn >= xen_evtchn_max_channels()) return -ENOMEM; mutex_lock(&irq_mapping_update_lock); - irq = get_evtchn_to_irq(evtchn); + info = evtchn_to_info(evtchn); - if (irq == -1) { + if (!info) { irq = xen_allocate_irq_dynamic(); if (irq < 0) goto out; @@ -1239,9 +1231,9 @@ static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip, */ bind_evtchn_to_cpu(evtchn, 0, false); } else { - struct irq_info *info = info_for_irq(irq); - if (!WARN_ON(!info || info->type != IRQT_EVTCHN)) + if (!WARN_ON(info->type != IRQT_EVTCHN)) info->refcnt++; + irq = info->irq; } out: @@ -1579,13 +1571,7 @@ EXPORT_SYMBOL_GPL(xen_set_irq_priority); int evtchn_make_refcounted(evtchn_port_t evtchn, bool is_static) { - int irq = get_evtchn_to_irq(evtchn); - struct irq_info *info; - - if (irq == -1) - return -ENOENT; - - info = info_for_irq(irq); + struct irq_info *info = evtchn_to_info(evtchn); if (!info) return -ENOENT; @@ -1601,7 +1587,6 @@ EXPORT_SYMBOL_GPL(evtchn_make_refcounted); int evtchn_get(evtchn_port_t evtchn) { - int irq; struct irq_info *info; int err = -ENOENT; @@ -1610,11 +1595,7 @@ int evtchn_get(evtchn_port_t evtchn) mutex_lock(&irq_mapping_update_lock); - irq = get_evtchn_to_irq(evtchn); - if (irq == -1) - goto done; - - info = info_for_irq(irq); + info = evtchn_to_info(evtchn); if (!info) goto done; @@ -1634,10 +1615,11 @@ EXPORT_SYMBOL_GPL(evtchn_get); void evtchn_put(evtchn_port_t evtchn) { - int irq = get_evtchn_to_irq(evtchn); - if (WARN_ON(irq == -1)) + struct irq_info *info = evtchn_to_info(evtchn); + + if (WARN_ON(!info)) return; - unbind_from_irq(irq); + unbind_from_irq(info->irq); } EXPORT_SYMBOL_GPL(evtchn_put); @@ -1667,12 +1649,10 @@ struct evtchn_loop_ctrl { void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl) { - int irq; - struct irq_info *info; + struct irq_info *info = evtchn_to_info(port); struct xenbus_device *dev; - irq = get_evtchn_to_irq(port); - if (irq == -1) + if (!info) return; /* @@ -1697,7 +1677,6 @@ void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl) } } - info = info_for_irq(irq); if (xchg_acquire(&info->is_active, 1)) return; @@ -1711,7 +1690,7 @@ void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl) info->eoi_time = get_jiffies_64() + event_eoi_delay; } - generic_handle_irq(irq); + generic_handle_irq(info->irq); } int xen_evtchn_do_upcall(void) @@ -1769,7 +1748,7 @@ void rebind_evtchn_irq(evtchn_port_t evtchn, int irq) mutex_lock(&irq_mapping_update_lock); /* After resume the irq<->evtchn mappings are all cleared out */ - BUG_ON(get_evtchn_to_irq(evtchn) != -1); + BUG_ON(evtchn_to_info(evtchn)); /* Expect irq to have been bound before, so there should be a proper type */ BUG_ON(info->type == IRQT_UNBOUND); -- 2.43.0