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From: David Woodhouse <dwmw2@infradead.org>
To: x86@kernel.org
Cc: kvm <kvm@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
	Paolo Bonzini <pbonzini@redhat.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-hyperv@vger.kernel.org
Subject: [PATCH v2 7/8] x86/hpet: Move MSI support into hpet.c
Date: Fri,  9 Oct 2020 11:46:15 +0100
Message-ID: <20201009104616.1314746-8-dwmw2@infradead.org> (raw)
In-Reply-To: <20201009104616.1314746-1-dwmw2@infradead.org>

From: David Woodhouse <dwmw@amazon.co.uk>

This isn't really dependent on PCI MSI; it's just generic MSI which is
now supported by the generic x86_vector_domain. Move the HPET MSI
support back into hpet.c with the rest of the HPET support.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
 arch/x86/include/asm/hpet.h |  11 ----
 arch/x86/kernel/apic/msi.c  | 111 ----------------------------------
 arch/x86/kernel/hpet.c      | 116 ++++++++++++++++++++++++++++++++++--
 3 files changed, 111 insertions(+), 127 deletions(-)

diff --git a/arch/x86/include/asm/hpet.h b/arch/x86/include/asm/hpet.h
index 6352dee37cda..ab9f3dd87c80 100644
--- a/arch/x86/include/asm/hpet.h
+++ b/arch/x86/include/asm/hpet.h
@@ -74,17 +74,6 @@ extern void hpet_disable(void);
 extern unsigned int hpet_readl(unsigned int a);
 extern void force_hpet_resume(void);
 
-struct irq_data;
-struct hpet_channel;
-struct irq_domain;
-
-extern void hpet_msi_unmask(struct irq_data *data);
-extern void hpet_msi_mask(struct irq_data *data);
-extern void hpet_msi_write(struct hpet_channel *hc, struct msi_msg *msg);
-extern struct irq_domain *hpet_create_irq_domain(int hpet_id);
-extern int hpet_assign_irq(struct irq_domain *domain,
-			   struct hpet_channel *hc, int dev_num);
-
 #ifdef CONFIG_HPET_EMULATE_RTC
 
 #include <linux/interrupt.h>
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index de585cfa4d6c..74190f83c034 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -341,114 +341,3 @@ void dmar_free_hwirq(int irq)
 	irq_domain_free_irqs(irq, 1);
 }
 #endif
-
-/*
- * MSI message composition
- */
-#ifdef CONFIG_HPET_TIMER
-static inline int hpet_dev_id(struct irq_domain *domain)
-{
-	struct msi_domain_info *info = msi_get_domain_info(domain);
-
-	return (int)(long)info->data;
-}
-
-static void hpet_msi_write_msg(struct irq_data *data, struct msi_msg *msg)
-{
-	hpet_msi_write(irq_data_get_irq_handler_data(data), msg);
-}
-
-static struct irq_chip hpet_msi_controller __ro_after_init = {
-	.name = "HPET-MSI",
-	.irq_unmask = hpet_msi_unmask,
-	.irq_mask = hpet_msi_mask,
-	.irq_ack = irq_chip_ack_parent,
-	.irq_set_affinity = msi_domain_set_affinity,
-	.irq_retrigger = irq_chip_retrigger_hierarchy,
-	.irq_write_msi_msg = hpet_msi_write_msg,
-	.flags = IRQCHIP_SKIP_SET_WAKE,
-};
-
-static int hpet_msi_init(struct irq_domain *domain,
-			 struct msi_domain_info *info, unsigned int virq,
-			 irq_hw_number_t hwirq, msi_alloc_info_t *arg)
-{
-	irq_set_status_flags(virq, IRQ_MOVE_PCNTXT);
-	irq_domain_set_info(domain, virq, arg->hwirq, info->chip, NULL,
-			    handle_edge_irq, arg->data, "edge");
-
-	return 0;
-}
-
-static void hpet_msi_free(struct irq_domain *domain,
-			  struct msi_domain_info *info, unsigned int virq)
-{
-	irq_clear_status_flags(virq, IRQ_MOVE_PCNTXT);
-}
-
-static struct msi_domain_ops hpet_msi_domain_ops = {
-	.msi_init	= hpet_msi_init,
-	.msi_free	= hpet_msi_free,
-};
-
-static struct msi_domain_info hpet_msi_domain_info = {
-	.ops		= &hpet_msi_domain_ops,
-	.chip		= &hpet_msi_controller,
-	.flags		= MSI_FLAG_USE_DEF_DOM_OPS,
-};
-
-struct irq_domain *hpet_create_irq_domain(int hpet_id)
-{
-	struct msi_domain_info *domain_info;
-	struct irq_domain *parent, *d;
-	struct irq_alloc_info info;
-	struct fwnode_handle *fn;
-
-	if (x86_vector_domain == NULL)
-		return NULL;
-
-	domain_info = kzalloc(sizeof(*domain_info), GFP_KERNEL);
-	if (!domain_info)
-		return NULL;
-
-	*domain_info = hpet_msi_domain_info;
-	domain_info->data = (void *)(long)hpet_id;
-
-	init_irq_alloc_info(&info, NULL);
-	info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
-	info.devid = hpet_id;
-	parent = irq_remapping_get_irq_domain(&info);
-	if (parent == NULL)
-		parent = x86_vector_domain;
-	else
-		hpet_msi_controller.name = "IR-HPET-MSI";
-
-	fn = irq_domain_alloc_named_id_fwnode(hpet_msi_controller.name,
-					      hpet_id);
-	if (!fn) {
-		kfree(domain_info);
-		return NULL;
-	}
-
-	d = msi_create_irq_domain(fn, domain_info, parent);
-	if (!d) {
-		irq_domain_free_fwnode(fn);
-		kfree(domain_info);
-	}
-	return d;
-}
-
-int hpet_assign_irq(struct irq_domain *domain, struct hpet_channel *hc,
-		    int dev_num)
-{
-	struct irq_alloc_info info;
-
-	init_irq_alloc_info(&info, NULL);
-	info.type = X86_IRQ_ALLOC_TYPE_HPET;
-	info.data = hc;
-	info.devid = hpet_dev_id(domain);
-	info.hwirq = dev_num;
-
-	return irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, &info);
-}
-#endif
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 7a50f0b62a70..11fd2676fb1d 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -7,6 +7,7 @@
 #include <linux/cpu.h>
 #include <linux/irq.h>
 
+#include <asm/irq_remapping.h>
 #include <asm/hpet.h>
 #include <asm/time.h>
 
@@ -467,9 +468,8 @@ static void __init hpet_legacy_clockevent_register(struct hpet_channel *hc)
 /*
  * HPET MSI Support
  */
-#ifdef CONFIG_PCI_MSI
-
-void hpet_msi_unmask(struct irq_data *data)
+#ifdef CONFIG_GENERIC_MSI_IRQ
+static void hpet_msi_unmask(struct irq_data *data)
 {
 	struct hpet_channel *hc = irq_data_get_irq_handler_data(data);
 	unsigned int cfg;
@@ -479,7 +479,7 @@ void hpet_msi_unmask(struct irq_data *data)
 	hpet_writel(cfg, HPET_Tn_CFG(hc->num));
 }
 
-void hpet_msi_mask(struct irq_data *data)
+static void hpet_msi_mask(struct irq_data *data)
 {
 	struct hpet_channel *hc = irq_data_get_irq_handler_data(data);
 	unsigned int cfg;
@@ -489,12 +489,118 @@ void hpet_msi_mask(struct irq_data *data)
 	hpet_writel(cfg, HPET_Tn_CFG(hc->num));
 }
 
-void hpet_msi_write(struct hpet_channel *hc, struct msi_msg *msg)
+static void hpet_msi_write(struct hpet_channel *hc, struct msi_msg *msg)
 {
 	hpet_writel(msg->data, HPET_Tn_ROUTE(hc->num));
 	hpet_writel(msg->address_lo, HPET_Tn_ROUTE(hc->num) + 4);
 }
 
+static void hpet_msi_write_msg(struct irq_data *data, struct msi_msg *msg)
+{
+	hpet_msi_write(irq_data_get_irq_handler_data(data), msg);
+}
+
+static struct irq_chip hpet_msi_controller __ro_after_init = {
+	.name = "HPET-MSI",
+	.irq_unmask = hpet_msi_unmask,
+	.irq_mask = hpet_msi_mask,
+	.irq_ack = irq_chip_ack_parent,
+	.irq_set_affinity = msi_domain_set_affinity,
+	.irq_retrigger = irq_chip_retrigger_hierarchy,
+	.irq_write_msi_msg = hpet_msi_write_msg,
+	.flags = IRQCHIP_SKIP_SET_WAKE,
+};
+
+static int hpet_msi_init(struct irq_domain *domain,
+			 struct msi_domain_info *info, unsigned int virq,
+			 irq_hw_number_t hwirq, msi_alloc_info_t *arg)
+{
+	irq_set_status_flags(virq, IRQ_MOVE_PCNTXT);
+	irq_domain_set_info(domain, virq, arg->hwirq, info->chip, NULL,
+			    handle_edge_irq, arg->data, "edge");
+
+	return 0;
+}
+
+static void hpet_msi_free(struct irq_domain *domain,
+			  struct msi_domain_info *info, unsigned int virq)
+{
+	irq_clear_status_flags(virq, IRQ_MOVE_PCNTXT);
+}
+
+static struct msi_domain_ops hpet_msi_domain_ops = {
+	.msi_init	= hpet_msi_init,
+	.msi_free	= hpet_msi_free,
+};
+
+static struct msi_domain_info hpet_msi_domain_info = {
+	.ops		= &hpet_msi_domain_ops,
+	.chip		= &hpet_msi_controller,
+	.flags		= MSI_FLAG_USE_DEF_DOM_OPS,
+};
+
+static struct irq_domain *hpet_create_irq_domain(int hpet_id)
+{
+	struct msi_domain_info *domain_info;
+	struct irq_domain *parent, *d;
+	struct irq_alloc_info info;
+	struct fwnode_handle *fn;
+
+	if (x86_vector_domain == NULL)
+		return NULL;
+
+	domain_info = kzalloc(sizeof(*domain_info), GFP_KERNEL);
+	if (!domain_info)
+		return NULL;
+
+	*domain_info = hpet_msi_domain_info;
+	domain_info->data = (void *)(long)hpet_id;
+
+	init_irq_alloc_info(&info, NULL);
+	info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
+	info.devid = hpet_id;
+	parent = irq_remapping_get_irq_domain(&info);
+	if (parent == NULL)
+		parent = x86_vector_domain;
+	else
+		hpet_msi_controller.name = "IR-HPET-MSI";
+
+	fn = irq_domain_alloc_named_id_fwnode(hpet_msi_controller.name,
+					      hpet_id);
+	if (!fn) {
+		kfree(domain_info);
+		return NULL;
+	}
+
+	d = msi_create_irq_domain(fn, domain_info, parent);
+	if (!d) {
+		irq_domain_free_fwnode(fn);
+		kfree(domain_info);
+	}
+	return d;
+}
+
+static inline int hpet_dev_id(struct irq_domain *domain)
+{
+	struct msi_domain_info *info = msi_get_domain_info(domain);
+
+	return (int)(long)info->data;
+}
+
+static int hpet_assign_irq(struct irq_domain *domain, struct hpet_channel *hc,
+			   int dev_num)
+{
+	struct irq_alloc_info info;
+
+	init_irq_alloc_info(&info, NULL);
+	info.type = X86_IRQ_ALLOC_TYPE_HPET;
+	info.data = hc;
+	info.devid = hpet_dev_id(domain);
+	info.hwirq = dev_num;
+
+	return irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, &info);
+}
+
 static int hpet_clkevt_msi_resume(struct clock_event_device *evt)
 {
 	struct hpet_channel *hc = clockevent_to_channel(evt);
-- 
2.26.2


  parent reply index

Thread overview: 113+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-07 12:20 [PATCH 0/5] Fix x2apic enablement and allow up to 32768 CPUs without IR where supported David Woodhouse
2020-10-07 12:20 ` [PATCH 1/5] x86/apic: Fix x2apic enablement without interrupt remapping David Woodhouse
2020-10-07 12:20   ` [PATCH 2/5] x86/msi: Only use high bits of MSI address for DMAR unit David Woodhouse
2020-10-07 12:20   ` [PATCH 3/5] x86/ioapic: Handle Extended Destination ID field in RTE David Woodhouse
2020-10-08  9:12     ` Peter Zijlstra
2020-10-08 17:05       ` David Woodhouse
2020-10-08 11:41     ` Thomas Gleixner
2020-10-07 12:20   ` [PATCH 4/5] x86/apic: Support 15 bits of APIC ID in IOAPIC/MSI where available David Woodhouse
2020-10-08 11:54     ` Thomas Gleixner
2020-10-08 12:02       ` Thomas Gleixner
2020-10-08 13:00       ` David Woodhouse
2020-10-07 12:20   ` [PATCH 5/5] x86/kvm: Add KVM_FEATURE_MSI_EXT_DEST_ID David Woodhouse
2020-10-08 12:05     ` Thomas Gleixner
2020-10-08 12:55       ` David Woodhouse
2020-10-08 16:08         ` David Woodhouse
2020-10-08 21:14           ` Thomas Gleixner
2020-10-08 21:39             ` David Woodhouse
2020-10-08 23:27               ` Thomas Gleixner
2020-10-09  6:07                 ` David Woodhouse
2020-10-10 10:06                 ` David Woodhouse
2020-10-10 11:44                   ` Thomas Gleixner
2020-10-10 11:58                     ` David Woodhouse
2020-10-11 17:12                       ` Thomas Gleixner
2020-10-11 21:15                         ` David Woodhouse
2020-10-12  9:33                           ` Thomas Gleixner
2020-10-12 16:06                             ` David Woodhouse
2020-10-12 18:38                               ` Thomas Gleixner
2020-10-12 20:20                                 ` David Woodhouse
2020-10-12 22:13                                   ` Thomas Gleixner
2020-10-13  7:52                                     ` David Woodhouse
2020-10-13  8:11                                       ` [PATCH 0/9] Remove irq_remapping_get_irq_domain() David Woodhouse
2020-10-13  8:11                                         ` [PATCH 1/9] genirq/irqdomain: Implement get_name() method on irqchip fwnodes David Woodhouse
2020-10-13  8:11                                         ` [PATCH 2/9] x86/apic: Add select() method on vector irqdomain David Woodhouse
2020-10-13  8:11                                         ` [PATCH 3/9] iommu/amd: Implement select() method on remapping irqdomain David Woodhouse
2020-10-13  8:11                                         ` [PATCH 4/9] iommu/vt-d: " David Woodhouse
2020-10-13  8:11                                         ` [PATCH 5/9] iommu/hyper-v: " David Woodhouse
2020-10-13  8:11                                         ` [PATCH 6/9] x86/hpet: Use irq_find_matching_fwspec() to find " David Woodhouse
2020-10-13  8:11                                         ` [PATCH 7/9] x86/ioapic: " David Woodhouse
2020-10-13  8:11                                         ` [PATCH 8/9] x86: Kill all traces of irq_remapping_get_irq_domain() David Woodhouse
2020-10-13  8:11                                         ` [PATCH 9/9] iommu/vt-d: Simplify intel_irq_remapping_select() David Woodhouse
2020-10-13  9:28                                       ` [PATCH 5/5] x86/kvm: Add KVM_FEATURE_MSI_EXT_DEST_ID Thomas Gleixner
2020-10-13 10:15                                         ` David Woodhouse
2020-10-13 10:46                                         ` Thomas Gleixner
2020-10-13 10:53                                           ` David Woodhouse
2020-10-13 11:51                                             ` David Woodhouse
2020-10-13 12:40                                               ` Thomas Gleixner
2020-10-08 11:46   ` [PATCH 1/5] x86/apic: Fix x2apic enablement without interrupt remapping Thomas Gleixner
2020-10-09 10:46 ` [PATCH v2 0/8] Fix x2apic enablement and allow up to 32768 CPUs without IR where supported David Woodhouse
2020-10-09 10:46   ` [PATCH v2 1/8] x86/apic: Fix x2apic enablement without interrupt remapping David Woodhouse
2020-10-09 10:46   ` [PATCH v2 2/8] x86/msi: Only use high bits of MSI address for DMAR unit David Woodhouse
2020-10-09 10:46   ` [PATCH v2 3/8] x86/apic: Always provide irq_compose_msi_msg() method for vector domain David Woodhouse
2020-10-09 10:46   ` [PATCH v2 4/8] x86/ioapic: Handle Extended Destination ID field in RTE David Woodhouse
2020-10-09 10:46   ` [PATCH v2 5/8] x86/apic: Support 15 bits of APIC ID in MSI where available David Woodhouse
2020-10-09 10:46   ` [PATCH v2 6/8] x86/kvm: Add KVM_FEATURE_MSI_EXT_DEST_ID David Woodhouse
2020-10-09 10:46   ` David Woodhouse [this message]
2020-10-09 10:46   ` [PATCH v2 8/8] x86/ioapic: Generate RTE directly from parent irqchip's MSI message David Woodhouse
2020-10-22 21:43     ` Thomas Gleixner
2020-10-22 22:10       ` Thomas Gleixner
2020-10-23 17:04         ` David Woodhouse
2020-10-23 10:10       ` David Woodhouse
2020-10-23 21:28         ` Thomas Gleixner
2020-10-24  8:26           ` David Woodhouse
2020-10-24  8:41             ` David Woodhouse
2020-10-24  9:13             ` Paolo Bonzini
2020-10-24 10:13               ` David Woodhouse
2020-10-24 12:44                 ` David Woodhouse
2020-10-24 21:35                   ` [PATCH v3 00/35] Fix x2apic enablement and allow more CPUs, clean up I/OAPIC and MSI bitfields David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 01/35] x86/apic: Fix x2apic enablement without interrupt remapping David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 02/35] x86/msi: Only use high bits of MSI address for DMAR unit David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 03/35] x86/apic/uv: Fix inconsistent destination mode David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 04/35] x86/devicetree: Fix the ioapic interrupt type table David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 05/35] x86/apic: Cleanup delivery mode defines David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 06/35] x86/apic: Replace pointless apic::dest_logical usage David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 07/35] x86/apic: Get rid of apic::dest_logical David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 08/35] x86/apic: Cleanup destination mode David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 09/35] x86/apic: Always provide irq_compose_msi_msg() method for vector domain David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 10/35] x86/hpet: Move MSI support into hpet.c David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 11/35] genirq/msi: Allow shadow declarations of msi_msg::$member David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 12/35] x86/msi: Provide msi message shadow structs David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 13/35] iommu/intel: Use msi_msg " David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 14/35] iommu/amd: " David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 15/35] PCI: vmd: " David Woodhouse
2020-10-28 20:49                       ` Kees Cook
2020-10-28 21:13                         ` Thomas Gleixner
2020-10-28 23:22                           ` Kees Cook
2020-10-24 21:35                     ` [PATCH v3 16/35] x86/kvm: " David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 17/35] x86/pci/xen: " David Woodhouse
2020-10-25  9:49                       ` David Laight
2020-10-25 10:26                         ` David Woodhouse
2020-10-25 13:20                           ` David Laight
2020-10-24 21:35                     ` [PATCH v3 18/35] x86/msi: Remove msidef.h David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 19/35] x86/io_apic: Cleanup trigger/polarity helpers David Woodhouse
2020-11-10  6:31                       ` Qian Cai
2020-11-10  8:59                         ` David Woodhouse
2020-11-10 16:26                           ` Paolo Bonzini
2020-10-24 21:35                     ` [PATCH v3 20/35] x86/ioapic: Cleanup IO/APIC route entry structs David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 21/35] x86/ioapic: Generate RTE directly from parent irqchip's MSI message David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 22/35] genirq/irqdomain: Implement get_name() method on irqchip fwnodes David Woodhouse
2020-10-25  9:41                       ` Marc Zyngier
2020-10-24 21:35                     ` [PATCH v3 23/35] x86/apic: Add select() method on vector irqdomain David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 24/35] iommu/amd: Implement select() method on remapping irqdomain David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 25/35] iommu/vt-d: " David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 26/35] iommu/hyper-v: " David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 27/35] x86/hpet: Use irq_find_matching_fwspec() to find " David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 28/35] x86/ioapic: " David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 29/35] x86: Kill all traces of irq_remapping_get_irq_domain() David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 30/35] iommu/vt-d: Simplify intel_irq_remapping_select() David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 31/35] x86/ioapic: Handle Extended Destination ID field in RTE David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 32/35] x86/apic: Support 15 bits of APIC ID in MSI where available David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 33/35] iommu/hyper-v: Disable IRQ pseudo-remapping if 15 bit APIC IDs are available David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 34/35] x86/kvm: Reserve KVM_FEATURE_MSI_EXT_DEST_ID David Woodhouse
2020-10-24 21:35                     ` [PATCH v3 35/35] x86/kvm: Enable 15-bit extension when KVM_FEATURE_MSI_EXT_DEST_ID detected David Woodhouse
2020-10-25  8:12                     ` [PATCH v3 00/35] Fix x2apic enablement and allow more CPUs, clean up I/OAPIC and MSI bitfields David Woodhouse

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Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org
	public-inbox-index kvm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git