From 23357b61f8062a8a8c9c84c0252056cd6d849ec8 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:29 +0200
Subject: iommu/amd: Prevent NULL pointer dereference

Dereferencing irq_data before checking it for NULL is suboptimal.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/iommu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 07ae8b93887e..db44ce67b979 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3731,8 +3731,8 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 
 	for (i = 0; i < nr_irqs; i++) {
 		irq_data = irq_domain_get_irq_data(domain, virq + i);
-		cfg = irqd_cfg(irq_data);
-		if (!irq_data || !cfg) {
+		cfg = irq_data ? irqd_cfg(irq_data) : NULL;
+		if (!cfg) {
 			ret = -EINVAL;
 			goto out_free_data;
 		}
-- 
cgit v1.2.3


From 801b5e4c4eec7b6c7f968d4bbce43da7cacffae4 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:35 +0200
Subject: x86_irq_Rename_X86_IRQ_ALLOC_TYPE_MSI_to_reflect_PCI_dependency

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.343103175@linutronix.de
---
 arch/x86/include/asm/hw_irq.h       |  4 ++--
 arch/x86/kernel/apic/msi.c          |  6 +++---
 drivers/iommu/amd/iommu.c           | 24 ++++++++++++------------
 drivers/iommu/intel/irq_remapping.c | 18 +++++++++---------
 4 files changed, 26 insertions(+), 26 deletions(-)

(limited to 'drivers/iommu')

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 74c12437401e..3982a1ea662a 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -36,8 +36,8 @@ struct msi_desc;
 enum irq_alloc_type {
 	X86_IRQ_ALLOC_TYPE_IOAPIC = 1,
 	X86_IRQ_ALLOC_TYPE_HPET,
-	X86_IRQ_ALLOC_TYPE_MSI,
-	X86_IRQ_ALLOC_TYPE_MSIX,
+	X86_IRQ_ALLOC_TYPE_PCI_MSI,
+	X86_IRQ_ALLOC_TYPE_PCI_MSIX,
 	X86_IRQ_ALLOC_TYPE_DMAR,
 	X86_IRQ_ALLOC_TYPE_UV,
 };
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index f4ed814e6025..7410d34a5b8d 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -187,7 +187,7 @@ int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 	struct irq_alloc_info info;
 
 	init_irq_alloc_info(&info, NULL);
-	info.type = X86_IRQ_ALLOC_TYPE_MSI;
+	info.type = X86_IRQ_ALLOC_TYPE_PCI_MSI;
 	info.msi_dev = dev;
 
 	domain = irq_remapping_get_irq_domain(&info);
@@ -219,9 +219,9 @@ int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
 	init_irq_alloc_info(arg, NULL);
 	arg->msi_dev = pdev;
 	if (desc->msi_attrib.is_msix) {
-		arg->type = X86_IRQ_ALLOC_TYPE_MSIX;
+		arg->type = X86_IRQ_ALLOC_TYPE_PCI_MSIX;
 	} else {
-		arg->type = X86_IRQ_ALLOC_TYPE_MSI;
+		arg->type = X86_IRQ_ALLOC_TYPE_PCI_MSI;
 		arg->flags |= X86_IRQ_ALLOC_CONTIGUOUS_VECTORS;
 	}
 
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index db44ce67b979..cf26b735922b 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3528,8 +3528,8 @@ static int get_devid(struct irq_alloc_info *info)
 	case X86_IRQ_ALLOC_TYPE_HPET:
 		devid     = get_hpet_devid(info->hpet_id);
 		break;
-	case X86_IRQ_ALLOC_TYPE_MSI:
-	case X86_IRQ_ALLOC_TYPE_MSIX:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		devid = get_device_id(&info->msi_dev->dev);
 		break;
 	default:
@@ -3567,8 +3567,8 @@ static struct irq_domain *get_irq_domain(struct irq_alloc_info *info)
 		return NULL;
 
 	switch (info->type) {
-	case X86_IRQ_ALLOC_TYPE_MSI:
-	case X86_IRQ_ALLOC_TYPE_MSIX:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		devid = get_device_id(&info->msi_dev->dev);
 		if (devid < 0)
 			return NULL;
@@ -3629,8 +3629,8 @@ static void irq_remapping_prepare_irte(struct amd_ir_data *data,
 		break;
 
 	case X86_IRQ_ALLOC_TYPE_HPET:
-	case X86_IRQ_ALLOC_TYPE_MSI:
-	case X86_IRQ_ALLOC_TYPE_MSIX:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		msg->address_hi = MSI_ADDR_BASE_HI;
 		msg->address_lo = MSI_ADDR_BASE_LO;
 		msg->data = irte_info->index;
@@ -3674,15 +3674,15 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 
 	if (!info)
 		return -EINVAL;
-	if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_MSI &&
-	    info->type != X86_IRQ_ALLOC_TYPE_MSIX)
+	if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_PCI_MSI &&
+	    info->type != X86_IRQ_ALLOC_TYPE_PCI_MSIX)
 		return -EINVAL;
 
 	/*
 	 * With IRQ remapping enabled, don't need contiguous CPU vectors
 	 * to support multiple MSI interrupts.
 	 */
-	if (info->type == X86_IRQ_ALLOC_TYPE_MSI)
+	if (info->type == X86_IRQ_ALLOC_TYPE_PCI_MSI)
 		info->flags &= ~X86_IRQ_ALLOC_CONTIGUOUS_VECTORS;
 
 	devid = get_devid(info);
@@ -3714,9 +3714,9 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 		} else {
 			index = -ENOMEM;
 		}
-	} else if (info->type == X86_IRQ_ALLOC_TYPE_MSI ||
-		   info->type == X86_IRQ_ALLOC_TYPE_MSIX) {
-		bool align = (info->type == X86_IRQ_ALLOC_TYPE_MSI);
+	} else if (info->type == X86_IRQ_ALLOC_TYPE_PCI_MSI ||
+		   info->type == X86_IRQ_ALLOC_TYPE_PCI_MSIX) {
+		bool align = (info->type == X86_IRQ_ALLOC_TYPE_PCI_MSI);
 
 		index = alloc_irq_index(devid, nr_irqs, align, info->msi_dev);
 	} else {
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 8f4ce72570ce..33c438989391 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1121,8 +1121,8 @@ static struct irq_domain *intel_get_ir_irq_domain(struct irq_alloc_info *info)
 	case X86_IRQ_ALLOC_TYPE_HPET:
 		iommu = map_hpet_to_ir(info->hpet_id);
 		break;
-	case X86_IRQ_ALLOC_TYPE_MSI:
-	case X86_IRQ_ALLOC_TYPE_MSIX:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		iommu = map_dev_to_ir(info->msi_dev);
 		break;
 	default:
@@ -1141,8 +1141,8 @@ static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
 		return NULL;
 
 	switch (info->type) {
-	case X86_IRQ_ALLOC_TYPE_MSI:
-	case X86_IRQ_ALLOC_TYPE_MSIX:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		iommu = map_dev_to_ir(info->msi_dev);
 		if (iommu)
 			return iommu->ir_msi_domain;
@@ -1312,8 +1312,8 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 		break;
 
 	case X86_IRQ_ALLOC_TYPE_HPET:
-	case X86_IRQ_ALLOC_TYPE_MSI:
-	case X86_IRQ_ALLOC_TYPE_MSIX:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		if (info->type == X86_IRQ_ALLOC_TYPE_HPET)
 			set_hpet_sid(irte, info->hpet_id);
 		else
@@ -1368,15 +1368,15 @@ static int intel_irq_remapping_alloc(struct irq_domain *domain,
 
 	if (!info || !iommu)
 		return -EINVAL;
-	if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_MSI &&
-	    info->type != X86_IRQ_ALLOC_TYPE_MSIX)
+	if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_PCI_MSI &&
+	    info->type != X86_IRQ_ALLOC_TYPE_PCI_MSIX)
 		return -EINVAL;
 
 	/*
 	 * With IRQ remapping enabled, don't need contiguous CPU vectors
 	 * to support multiple MSI interrupts.
 	 */
-	if (info->type == X86_IRQ_ALLOC_TYPE_MSI)
+	if (info->type == X86_IRQ_ALLOC_TYPE_PCI_MSI)
 		info->flags &= ~X86_IRQ_ALLOC_CONTIGUOUS_VECTORS;
 
 	ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg);
-- 
cgit v1.2.3


From b4c364da32cf3b85297648ff5563de2c47d9e32f Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:36 +0200
Subject: x86/irq: Add allocation type for parent domain retrieval

irq_remapping_ir_irq_domain() is used to retrieve the remapping parent
domain for an allocation type. irq_remapping_irq_domain() is for retrieving
the actual device domain for allocating interrupts for a device.

The two functions are similar and can be unified by using explicit modes
for parent irq domain retrieval.

Add X86_IRQ_ALLOC_TYPE_IOAPIC/HPET_GET_PARENT and use it in the iommu
implementations. Drop the parent domain retrieval for PCI_MSI/X as that is
unused.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.436350257@linutronix.de
---
 arch/x86/include/asm/hw_irq.h       | 2 ++
 arch/x86/kernel/apic/io_apic.c      | 2 +-
 arch/x86/kernel/apic/msi.c          | 2 +-
 drivers/iommu/amd/iommu.c           | 8 ++++++++
 drivers/iommu/hyperv-iommu.c        | 2 +-
 drivers/iommu/intel/irq_remapping.c | 8 ++------
 6 files changed, 15 insertions(+), 9 deletions(-)

(limited to 'drivers/iommu')

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 3982a1ea662a..91b064da6ce5 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -40,6 +40,8 @@ enum irq_alloc_type {
 	X86_IRQ_ALLOC_TYPE_PCI_MSIX,
 	X86_IRQ_ALLOC_TYPE_DMAR,
 	X86_IRQ_ALLOC_TYPE_UV,
+	X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT,
+	X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT,
 };
 
 struct irq_alloc_info {
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 779a89e31c4c..be01bb608d49 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2296,7 +2296,7 @@ static int mp_irqdomain_create(int ioapic)
 		return 0;
 
 	init_irq_alloc_info(&info, NULL);
-	info.type = X86_IRQ_ALLOC_TYPE_IOAPIC;
+	info.type = X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT;
 	info.ioapic_id = mpc_ioapic_id(ioapic);
 	parent = irq_remapping_get_ir_irq_domain(&info);
 	if (!parent)
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 7410d34a5b8d..421c0169a124 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -472,7 +472,7 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id)
 	domain_info->data = (void *)(long)hpet_id;
 
 	init_irq_alloc_info(&info, NULL);
-	info.type = X86_IRQ_ALLOC_TYPE_HPET;
+	info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
 	info.hpet_id = hpet_id;
 	parent = irq_remapping_get_ir_irq_domain(&info);
 	if (parent == NULL)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index cf26b735922b..b98b0abac103 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3548,6 +3548,14 @@ static struct irq_domain *get_ir_irq_domain(struct irq_alloc_info *info)
 	if (!info)
 		return NULL;
 
+	switch (info->type) {
+	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
+	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
+		break;
+	default:
+		return NULL;
+	}
+
 	devid = get_devid(info);
 	if (devid >= 0) {
 		iommu = amd_iommu_rlookup_table[devid];
diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index 8919c1c70b68..e7bee11ecedc 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -184,7 +184,7 @@ static int __init hyperv_enable_irq_remapping(void)
 
 static struct irq_domain *hyperv_get_ir_irq_domain(struct irq_alloc_info *info)
 {
-	if (info->type == X86_IRQ_ALLOC_TYPE_IOAPIC)
+	if (info->type == X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT)
 		return ioapic_ir_domain;
 	else
 		return NULL;
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 33c438989391..9b15cd015f8d 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1115,16 +1115,12 @@ static struct irq_domain *intel_get_ir_irq_domain(struct irq_alloc_info *info)
 		return NULL;
 
 	switch (info->type) {
-	case X86_IRQ_ALLOC_TYPE_IOAPIC:
+	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
 		iommu = map_ioapic_to_ir(info->ioapic_id);
 		break;
-	case X86_IRQ_ALLOC_TYPE_HPET:
+	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
 		iommu = map_hpet_to_ir(info->hpet_id);
 		break;
-	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
-	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		iommu = map_dev_to_ir(info->msi_dev);
-		break;
 	default:
 		BUG_ON(1);
 		break;
-- 
cgit v1.2.3


From 60e5a9397c0c4b7cecf05fec1aef8fe2ae5c9f3c Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:37 +0200
Subject: iommu/vt-d: Consolidate irq domain getter

The irq domain request mode is now indicated in irq_alloc_info::type.

Consolidate the two getter functions into one.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.530546013@linutronix.de
---
 drivers/iommu/intel/irq_remapping.c | 67 +++++++++++++------------------------
 1 file changed, 24 insertions(+), 43 deletions(-)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 9b15cd015f8d..d85656e93a46 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -204,35 +204,40 @@ static int modify_irte(struct irq_2_iommu *irq_iommu,
 	return rc;
 }
 
-static struct intel_iommu *map_hpet_to_ir(u8 hpet_id)
+static struct irq_domain *map_hpet_to_ir(u8 hpet_id)
 {
 	int i;
 
-	for (i = 0; i < MAX_HPET_TBS; i++)
+	for (i = 0; i < MAX_HPET_TBS; i++) {
 		if (ir_hpet[i].id == hpet_id && ir_hpet[i].iommu)
-			return ir_hpet[i].iommu;
+			return ir_hpet[i].iommu->ir_domain;
+	}
 	return NULL;
 }
 
-static struct intel_iommu *map_ioapic_to_ir(int apic)
+static struct intel_iommu *map_ioapic_to_iommu(int apic)
 {
 	int i;
 
-	for (i = 0; i < MAX_IO_APICS; i++)
+	for (i = 0; i < MAX_IO_APICS; i++) {
 		if (ir_ioapic[i].id == apic && ir_ioapic[i].iommu)
 			return ir_ioapic[i].iommu;
+	}
 	return NULL;
 }
 
-static struct intel_iommu *map_dev_to_ir(struct pci_dev *dev)
+static struct irq_domain *map_ioapic_to_ir(int apic)
 {
-	struct dmar_drhd_unit *drhd;
+	struct intel_iommu *iommu = map_ioapic_to_iommu(apic);
 
-	drhd = dmar_find_matched_drhd_unit(dev);
-	if (!drhd)
-		return NULL;
+	return iommu ? iommu->ir_domain : NULL;
+}
 
-	return drhd->iommu;
+static struct irq_domain *map_dev_to_ir(struct pci_dev *dev)
+{
+	struct dmar_drhd_unit *drhd = dmar_find_matched_drhd_unit(dev);
+
+	return drhd ? drhd->iommu->ir_msi_domain : NULL;
 }
 
 static int clear_entries(struct irq_2_iommu *irq_iommu)
@@ -1002,7 +1007,7 @@ static int __init parse_ioapics_under_ir(void)
 
 	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++) {
 		int ioapic_id = mpc_ioapic_id(ioapic_idx);
-		if (!map_ioapic_to_ir(ioapic_id)) {
+		if (!map_ioapic_to_iommu(ioapic_id)) {
 			pr_err(FW_BUG "ioapic %d has no mapping iommu, "
 			       "interrupt remapping will be disabled\n",
 			       ioapic_id);
@@ -1107,47 +1112,23 @@ static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
 	irte->redir_hint = 1;
 }
 
-static struct irq_domain *intel_get_ir_irq_domain(struct irq_alloc_info *info)
+static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
 {
-	struct intel_iommu *iommu = NULL;
-
 	if (!info)
 		return NULL;
 
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
-		iommu = map_ioapic_to_ir(info->ioapic_id);
-		break;
+		return map_ioapic_to_ir(info->ioapic_id);
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
-		iommu = map_hpet_to_ir(info->hpet_id);
-		break;
-	default:
-		BUG_ON(1);
-		break;
-	}
-
-	return iommu ? iommu->ir_domain : NULL;
-}
-
-static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
-{
-	struct intel_iommu *iommu;
-
-	if (!info)
-		return NULL;
-
-	switch (info->type) {
+		return map_hpet_to_ir(info->hpet_id);
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		iommu = map_dev_to_ir(info->msi_dev);
-		if (iommu)
-			return iommu->ir_msi_domain;
-		break;
+		return map_dev_to_ir(info->msi_dev);
 	default:
-		break;
+		WARN_ON_ONCE(1);
+		return NULL;
 	}
-
-	return NULL;
 }
 
 struct irq_remap_ops intel_irq_remap_ops = {
@@ -1156,7 +1137,7 @@ struct irq_remap_ops intel_irq_remap_ops = {
 	.disable		= disable_irq_remapping,
 	.reenable		= reenable_irq_remapping,
 	.enable_faulting	= enable_drhd_fault_handling,
-	.get_ir_irq_domain	= intel_get_ir_irq_domain,
+	.get_ir_irq_domain	= intel_get_irq_domain,
 	.get_irq_domain		= intel_get_irq_domain,
 };
 
-- 
cgit v1.2.3


From 192a99f4bd9d1d546ca276e058761a79af575744 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:38 +0200
Subject: iommu/amd: Consolidate irq domain getter

The irq domain request mode is now indicated in irq_alloc_info::type.

Consolidate the two getter functions into one.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.634777249@linutronix.de
---
 drivers/iommu/amd/iommu.c | 65 +++++++++++++++--------------------------------
 1 file changed, 21 insertions(+), 44 deletions(-)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index b98b0abac103..4d4045aec837 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3519,77 +3519,54 @@ static void irte_ga_clear_allocated(struct irq_remap_table *table, int index)
 
 static int get_devid(struct irq_alloc_info *info)
 {
-	int devid = -1;
-
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC:
-		devid     = get_ioapic_devid(info->ioapic_id);
-		break;
+	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
+		return get_ioapic_devid(info->ioapic_id);
 	case X86_IRQ_ALLOC_TYPE_HPET:
-		devid     = get_hpet_devid(info->hpet_id);
-		break;
+	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
+		return get_hpet_devid(info->hpet_id);
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		devid = get_device_id(&info->msi_dev->dev);
-		break;
+		return get_device_id(&info->msi_dev->dev);
 	default:
-		BUG_ON(1);
-		break;
+		WARN_ON_ONCE(1);
+		return -1;
 	}
-
-	return devid;
 }
 
-static struct irq_domain *get_ir_irq_domain(struct irq_alloc_info *info)
+static struct irq_domain *get_irq_domain_for_devid(struct irq_alloc_info *info,
+						   int devid)
 {
-	struct amd_iommu *iommu;
-	int devid;
+	struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
 
-	if (!info)
+	if (!iommu)
 		return NULL;
 
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
-		break;
+		return iommu->ir_domain;
+	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
+	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
+		return iommu->msi_domain;
 	default:
+		WARN_ON_ONCE(1);
 		return NULL;
 	}
-
-	devid = get_devid(info);
-	if (devid >= 0) {
-		iommu = amd_iommu_rlookup_table[devid];
-		if (iommu)
-			return iommu->ir_domain;
-	}
-
-	return NULL;
 }
 
 static struct irq_domain *get_irq_domain(struct irq_alloc_info *info)
 {
-	struct amd_iommu *iommu;
 	int devid;
 
 	if (!info)
 		return NULL;
 
-	switch (info->type) {
-	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
-	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		devid = get_device_id(&info->msi_dev->dev);
-		if (devid < 0)
-			return NULL;
-
-		iommu = amd_iommu_rlookup_table[devid];
-		if (iommu)
-			return iommu->msi_domain;
-		break;
-	default:
-		break;
-	}
-
-	return NULL;
+	devid = get_devid(info);
+	if (devid < 0)
+		return NULL;
+	return get_irq_domain_for_devid(info, devid);
 }
 
 struct irq_remap_ops amd_iommu_irq_ops = {
@@ -3598,7 +3575,7 @@ struct irq_remap_ops amd_iommu_irq_ops = {
 	.disable		= amd_iommu_disable,
 	.reenable		= amd_iommu_reenable,
 	.enable_faulting	= amd_iommu_enable_faulting,
-	.get_ir_irq_domain	= get_ir_irq_domain,
+	.get_ir_irq_domain	= get_irq_domain,
 	.get_irq_domain		= get_irq_domain,
 };
 
-- 
cgit v1.2.3


From 6b6256e616f7e10c4434cfcd32371fc33ca94e48 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:39 +0200
Subject: iommu/irq_remapping: Consolidate irq domain lookup

Now that the iommu implementations handle the X86_*_GET_PARENT_DOMAIN
types, consolidate the two getter functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.741909337@linutronix.de
---
 arch/x86/include/asm/irq_remapping.h |  8 --------
 arch/x86/kernel/apic/io_apic.c       |  2 +-
 arch/x86/kernel/apic/msi.c           |  2 +-
 drivers/iommu/amd/iommu.c            |  1 -
 drivers/iommu/hyperv-iommu.c         |  4 ++--
 drivers/iommu/intel/irq_remapping.c  |  1 -
 drivers/iommu/irq_remapping.c        | 23 +----------------------
 drivers/iommu/irq_remapping.h        |  5 +----
 8 files changed, 6 insertions(+), 40 deletions(-)

(limited to 'drivers/iommu')

diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 4bc985f1e2e4..af4a151d70b3 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -44,8 +44,6 @@ extern int irq_remapping_reenable(int);
 extern int irq_remap_enable_fault_handling(void);
 extern void panic_if_irq_remap(const char *msg);
 
-extern struct irq_domain *
-irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info);
 extern struct irq_domain *
 irq_remapping_get_irq_domain(struct irq_alloc_info *info);
 
@@ -73,12 +71,6 @@ static inline void panic_if_irq_remap(const char *msg)
 {
 }
 
-static inline struct irq_domain *
-irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
-{
-	return NULL;
-}
-
 static inline struct irq_domain *
 irq_remapping_get_irq_domain(struct irq_alloc_info *info)
 {
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index be01bb608d49..20ba0b76021b 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2298,7 +2298,7 @@ static int mp_irqdomain_create(int ioapic)
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT;
 	info.ioapic_id = mpc_ioapic_id(ioapic);
-	parent = irq_remapping_get_ir_irq_domain(&info);
+	parent = irq_remapping_get_irq_domain(&info);
 	if (!parent)
 		parent = x86_vector_domain;
 	else
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 421c0169a124..9edb1bbdc805 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -474,7 +474,7 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id)
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
 	info.hpet_id = hpet_id;
-	parent = irq_remapping_get_ir_irq_domain(&info);
+	parent = irq_remapping_get_irq_domain(&info);
 	if (parent == NULL)
 		parent = x86_vector_domain;
 	else
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 4d4045aec837..18b4dfb1a605 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3575,7 +3575,6 @@ struct irq_remap_ops amd_iommu_irq_ops = {
 	.disable		= amd_iommu_disable,
 	.reenable		= amd_iommu_reenable,
 	.enable_faulting	= amd_iommu_enable_faulting,
-	.get_ir_irq_domain	= get_irq_domain,
 	.get_irq_domain		= get_irq_domain,
 };
 
diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index e7bee11ecedc..dc82a1dbcb7c 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -182,7 +182,7 @@ static int __init hyperv_enable_irq_remapping(void)
 	return IRQ_REMAP_X2APIC_MODE;
 }
 
-static struct irq_domain *hyperv_get_ir_irq_domain(struct irq_alloc_info *info)
+static struct irq_domain *hyperv_get_irq_domain(struct irq_alloc_info *info)
 {
 	if (info->type == X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT)
 		return ioapic_ir_domain;
@@ -193,7 +193,7 @@ static struct irq_domain *hyperv_get_ir_irq_domain(struct irq_alloc_info *info)
 struct irq_remap_ops hyperv_irq_remap_ops = {
 	.prepare		= hyperv_prepare_irq_remapping,
 	.enable			= hyperv_enable_irq_remapping,
-	.get_ir_irq_domain	= hyperv_get_ir_irq_domain,
+	.get_irq_domain		= hyperv_get_irq_domain,
 };
 
 #endif
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index d85656e93a46..0289a78b7b11 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1137,7 +1137,6 @@ struct irq_remap_ops intel_irq_remap_ops = {
 	.disable		= disable_irq_remapping,
 	.reenable		= reenable_irq_remapping,
 	.enable_faulting	= enable_drhd_fault_handling,
-	.get_ir_irq_domain	= intel_get_irq_domain,
 	.get_irq_domain		= intel_get_irq_domain,
 };
 
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 83f36f61416e..2d84b1ed205e 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -159,34 +159,13 @@ void panic_if_irq_remap(const char *msg)
 		panic(msg);
 }
 
-/**
- * irq_remapping_get_ir_irq_domain - Get the irqdomain associated with the IOMMU
- *				     device serving request @info
- * @info: interrupt allocation information, used to identify the IOMMU device
- *
- * It's used to get parent irqdomain for HPET and IOAPIC irqdomains.
- * Returns pointer to IRQ domain, or NULL on failure.
- */
-struct irq_domain *
-irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
-{
-	if (!remap_ops || !remap_ops->get_ir_irq_domain)
-		return NULL;
-
-	return remap_ops->get_ir_irq_domain(info);
-}
-
 /**
  * irq_remapping_get_irq_domain - Get the irqdomain serving the request @info
  * @info: interrupt allocation information, used to identify the IOMMU device
  *
- * There will be one PCI MSI/MSIX irqdomain associated with each interrupt
- * remapping device, so this interface is used to retrieve the PCI MSI/MSIX
- * irqdomain serving request @info.
  * Returns pointer to IRQ domain, or NULL on failure.
  */
-struct irq_domain *
-irq_remapping_get_irq_domain(struct irq_alloc_info *info)
+struct irq_domain *irq_remapping_get_irq_domain(struct irq_alloc_info *info)
 {
 	if (!remap_ops || !remap_ops->get_irq_domain)
 		return NULL;
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 6a190d504eb6..1661b3d75920 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -43,10 +43,7 @@ struct irq_remap_ops {
 	/* Enable fault handling */
 	int  (*enable_faulting)(void);
 
-	/* Get the irqdomain associated the IOMMU device */
-	struct irq_domain *(*get_ir_irq_domain)(struct irq_alloc_info *);
-
-	/* Get the MSI irqdomain associated with the IOMMU device */
+	/* Get the irqdomain associated to IOMMU device */
 	struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
 };
 
-- 
cgit v1.2.3


From 2bf1e7bcedb8802cb4fc65757b229edfe112a4bb Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:41 +0200
Subject: x86/msi: Consolidate HPET allocation

None of the magic HPET fields are required in any way.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.943993771@linutronix.de
---
 arch/x86/include/asm/hw_irq.h       |  7 -------
 arch/x86/kernel/apic/msi.c          | 14 +++++++-------
 drivers/iommu/amd/iommu.c           |  2 +-
 drivers/iommu/intel/irq_remapping.c |  4 ++--
 4 files changed, 10 insertions(+), 17 deletions(-)

(limited to 'drivers/iommu')

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index b0e15f617675..2d39e61b9f55 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -65,13 +65,6 @@ struct irq_alloc_info {
 
 	union {
 		int		unused;
-#ifdef	CONFIG_HPET_TIMER
-		struct {
-			int		hpet_id;
-			int		hpet_index;
-			void		*hpet_data;
-		};
-#endif
 #ifdef	CONFIG_PCI_MSI
 		struct {
 			struct pci_dev	*msi_dev;
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 9edb1bbdc805..da68d0828496 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -423,7 +423,7 @@ static struct irq_chip hpet_msi_controller __ro_after_init = {
 static irq_hw_number_t hpet_msi_get_hwirq(struct msi_domain_info *info,
 					  msi_alloc_info_t *arg)
 {
-	return arg->hpet_index;
+	return arg->hwirq;
 }
 
 static int hpet_msi_init(struct irq_domain *domain,
@@ -431,8 +431,8 @@ static int hpet_msi_init(struct irq_domain *domain,
 			 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->hpet_index, info->chip, NULL,
-			    handle_edge_irq, arg->hpet_data, "edge");
+	irq_domain_set_info(domain, virq, arg->hwirq, info->chip, NULL,
+			    handle_edge_irq, arg->data, "edge");
 
 	return 0;
 }
@@ -473,7 +473,7 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id)
 
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
-	info.hpet_id = hpet_id;
+	info.devid = hpet_id;
 	parent = irq_remapping_get_irq_domain(&info);
 	if (parent == NULL)
 		parent = x86_vector_domain;
@@ -502,9 +502,9 @@ int hpet_assign_irq(struct irq_domain *domain, struct hpet_channel *hc,
 
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_HPET;
-	info.hpet_data = hc;
-	info.hpet_id = hpet_dev_id(domain);
-	info.hpet_index = dev_num;
+	info.data = hc;
+	info.devid = hpet_dev_id(domain);
+	info.hwirq = dev_num;
 
 	return irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, &info);
 }
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 18b4dfb1a605..a3084729a532 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3525,7 +3525,7 @@ static int get_devid(struct irq_alloc_info *info)
 		return get_ioapic_devid(info->ioapic_id);
 	case X86_IRQ_ALLOC_TYPE_HPET:
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
-		return get_hpet_devid(info->hpet_id);
+		return get_hpet_devid(info->devid);
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		return get_device_id(&info->msi_dev->dev);
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 0289a78b7b11..58c2d7a57370 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1121,7 +1121,7 @@ static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
 	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
 		return map_ioapic_to_ir(info->ioapic_id);
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
-		return map_hpet_to_ir(info->hpet_id);
+		return map_hpet_to_ir(info->devid);
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		return map_dev_to_ir(info->msi_dev);
@@ -1291,7 +1291,7 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
 		if (info->type == X86_IRQ_ALLOC_TYPE_HPET)
-			set_hpet_sid(irte, info->hpet_id);
+			set_hpet_sid(irte, info->devid);
 		else
 			set_msi_sid(irte, info->msi_dev);
 
-- 
cgit v1.2.3


From 33a65ba470c2b7031e513f7b165e68f51cfc55eb Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:42 +0200
Subject: x86_ioapic_Consolidate_IOAPIC_allocation

Move the IOAPIC specific fields into their own struct and reuse the common
devid. Get rid of the #ifdeffery as it does not matter at all whether the
alloc info is a couple of bytes longer or not.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Wei Liu <wei.liu@kernel.org>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112332.054367732@linutronix.de
---
 arch/x86/include/asm/hw_irq.h       | 23 ++++++------
 arch/x86/kernel/apic/io_apic.c      | 70 ++++++++++++++++++-------------------
 arch/x86/kernel/devicetree.c        |  4 +--
 drivers/iommu/amd/iommu.c           | 14 ++++----
 drivers/iommu/hyperv-iommu.c        |  2 +-
 drivers/iommu/intel/irq_remapping.c | 18 +++++-----
 6 files changed, 66 insertions(+), 65 deletions(-)

(limited to 'drivers/iommu')

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 2d39e61b9f55..641bc14608ff 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -44,6 +44,15 @@ enum irq_alloc_type {
 	X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT,
 };
 
+struct ioapic_alloc_info {
+	int				pin;
+	int				node;
+	u32				trigger : 1;
+	u32				polarity : 1;
+	u32				valid : 1;
+	struct IO_APIC_route_entry	*entry;
+};
+
 /**
  * irq_alloc_info - X86 specific interrupt allocation info
  * @type:	X86 specific allocation type
@@ -53,6 +62,8 @@ enum irq_alloc_type {
  * @mask:	CPU mask for vector allocation
  * @desc:	Pointer to msi descriptor
  * @data:	Allocation specific data
+ *
+ * @ioapic:	IOAPIC specific allocation data
  */
 struct irq_alloc_info {
 	enum irq_alloc_type	type;
@@ -64,6 +75,7 @@ struct irq_alloc_info {
 	void			*data;
 
 	union {
+		struct ioapic_alloc_info	ioapic;
 		int		unused;
 #ifdef	CONFIG_PCI_MSI
 		struct {
@@ -71,17 +83,6 @@ struct irq_alloc_info {
 			irq_hw_number_t	msi_hwirq;
 		};
 #endif
-#ifdef	CONFIG_X86_IO_APIC
-		struct {
-			int		ioapic_id;
-			int		ioapic_pin;
-			int		ioapic_node;
-			u32		ioapic_trigger : 1;
-			u32		ioapic_polarity : 1;
-			u32		ioapic_valid : 1;
-			struct IO_APIC_route_entry *ioapic_entry;
-		};
-#endif
 #ifdef	CONFIG_DMAR_TABLE
 		struct {
 			int		dmar_id;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 20ba0b76021b..a33380059db6 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -860,10 +860,10 @@ void ioapic_set_alloc_attr(struct irq_alloc_info *info, int node,
 {
 	init_irq_alloc_info(info, NULL);
 	info->type = X86_IRQ_ALLOC_TYPE_IOAPIC;
-	info->ioapic_node = node;
-	info->ioapic_trigger = trigger;
-	info->ioapic_polarity = polarity;
-	info->ioapic_valid = 1;
+	info->ioapic.node = node;
+	info->ioapic.trigger = trigger;
+	info->ioapic.polarity = polarity;
+	info->ioapic.valid = 1;
 }
 
 #ifndef CONFIG_ACPI
@@ -878,32 +878,32 @@ static void ioapic_copy_alloc_attr(struct irq_alloc_info *dst,
 
 	copy_irq_alloc_info(dst, src);
 	dst->type = X86_IRQ_ALLOC_TYPE_IOAPIC;
-	dst->ioapic_id = mpc_ioapic_id(ioapic_idx);
-	dst->ioapic_pin = pin;
-	dst->ioapic_valid = 1;
-	if (src && src->ioapic_valid) {
-		dst->ioapic_node = src->ioapic_node;
-		dst->ioapic_trigger = src->ioapic_trigger;
-		dst->ioapic_polarity = src->ioapic_polarity;
+	dst->devid = mpc_ioapic_id(ioapic_idx);
+	dst->ioapic.pin = pin;
+	dst->ioapic.valid = 1;
+	if (src && src->ioapic.valid) {
+		dst->ioapic.node = src->ioapic.node;
+		dst->ioapic.trigger = src->ioapic.trigger;
+		dst->ioapic.polarity = src->ioapic.polarity;
 	} else {
-		dst->ioapic_node = NUMA_NO_NODE;
+		dst->ioapic.node = NUMA_NO_NODE;
 		if (acpi_get_override_irq(gsi, &trigger, &polarity) >= 0) {
-			dst->ioapic_trigger = trigger;
-			dst->ioapic_polarity = polarity;
+			dst->ioapic.trigger = trigger;
+			dst->ioapic.polarity = polarity;
 		} else {
 			/*
 			 * PCI interrupts are always active low level
 			 * triggered.
 			 */
-			dst->ioapic_trigger = IOAPIC_LEVEL;
-			dst->ioapic_polarity = IOAPIC_POL_LOW;
+			dst->ioapic.trigger = IOAPIC_LEVEL;
+			dst->ioapic.polarity = IOAPIC_POL_LOW;
 		}
 	}
 }
 
 static int ioapic_alloc_attr_node(struct irq_alloc_info *info)
 {
-	return (info && info->ioapic_valid) ? info->ioapic_node : NUMA_NO_NODE;
+	return (info && info->ioapic.valid) ? info->ioapic.node : NUMA_NO_NODE;
 }
 
 static void mp_register_handler(unsigned int irq, unsigned long trigger)
@@ -933,14 +933,14 @@ static bool mp_check_pin_attr(int irq, struct irq_alloc_info *info)
 	 * pin with real trigger and polarity attributes.
 	 */
 	if (irq < nr_legacy_irqs() && data->count == 1) {
-		if (info->ioapic_trigger != data->trigger)
-			mp_register_handler(irq, info->ioapic_trigger);
-		data->entry.trigger = data->trigger = info->ioapic_trigger;
-		data->entry.polarity = data->polarity = info->ioapic_polarity;
+		if (info->ioapic.trigger != data->trigger)
+			mp_register_handler(irq, info->ioapic.trigger);
+		data->entry.trigger = data->trigger = info->ioapic.trigger;
+		data->entry.polarity = data->polarity = info->ioapic.polarity;
 	}
 
-	return data->trigger == info->ioapic_trigger &&
-	       data->polarity == info->ioapic_polarity;
+	return data->trigger == info->ioapic.trigger &&
+	       data->polarity == info->ioapic.polarity;
 }
 
 static int alloc_irq_from_domain(struct irq_domain *domain, int ioapic, u32 gsi,
@@ -1002,7 +1002,7 @@ static int alloc_isa_irq_from_domain(struct irq_domain *domain,
 		if (!mp_check_pin_attr(irq, info))
 			return -EBUSY;
 		if (__add_pin_to_irq_node(irq_data->chip_data, node, ioapic,
-					  info->ioapic_pin))
+					  info->ioapic.pin))
 			return -ENOMEM;
 	} else {
 		info->flags |= X86_IRQ_ALLOC_LEGACY;
@@ -2092,8 +2092,8 @@ static int mp_alloc_timer_irq(int ioapic, int pin)
 		struct irq_alloc_info info;
 
 		ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 0, 0);
-		info.ioapic_id = mpc_ioapic_id(ioapic);
-		info.ioapic_pin = pin;
+		info.devid = mpc_ioapic_id(ioapic);
+		info.ioapic.pin = pin;
 		mutex_lock(&ioapic_mutex);
 		irq = alloc_isa_irq_from_domain(domain, 0, ioapic, pin, &info);
 		mutex_unlock(&ioapic_mutex);
@@ -2297,7 +2297,7 @@ static int mp_irqdomain_create(int ioapic)
 
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT;
-	info.ioapic_id = mpc_ioapic_id(ioapic);
+	info.devid = mpc_ioapic_id(ioapic);
 	parent = irq_remapping_get_irq_domain(&info);
 	if (!parent)
 		parent = x86_vector_domain;
@@ -2932,9 +2932,9 @@ int mp_ioapic_registered(u32 gsi_base)
 static void mp_irqdomain_get_attr(u32 gsi, struct mp_chip_data *data,
 				  struct irq_alloc_info *info)
 {
-	if (info && info->ioapic_valid) {
-		data->trigger = info->ioapic_trigger;
-		data->polarity = info->ioapic_polarity;
+	if (info && info->ioapic.valid) {
+		data->trigger = info->ioapic.trigger;
+		data->polarity = info->ioapic.polarity;
 	} else if (acpi_get_override_irq(gsi, &data->trigger,
 					 &data->polarity) < 0) {
 		/* PCI interrupts are always active low level triggered. */
@@ -2980,7 +2980,7 @@ int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
 		return -EINVAL;
 
 	ioapic = mp_irqdomain_ioapic_idx(domain);
-	pin = info->ioapic_pin;
+	pin = info->ioapic.pin;
 	if (irq_find_mapping(domain, (irq_hw_number_t)pin) > 0)
 		return -EEXIST;
 
@@ -2988,7 +2988,7 @@ int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
 	if (!data)
 		return -ENOMEM;
 
-	info->ioapic_entry = &data->entry;
+	info->ioapic.entry = &data->entry;
 	ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, info);
 	if (ret < 0) {
 		kfree(data);
@@ -2996,7 +2996,7 @@ int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
 	}
 
 	INIT_LIST_HEAD(&data->irq_2_pin);
-	irq_data->hwirq = info->ioapic_pin;
+	irq_data->hwirq = info->ioapic.pin;
 	irq_data->chip = (domain->parent == x86_vector_domain) ?
 			  &ioapic_chip : &ioapic_ir_chip;
 	irq_data->chip_data = data;
@@ -3006,8 +3006,8 @@ int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
 	add_pin_to_irq_node(data, ioapic_alloc_attr_node(info), ioapic, pin);
 
 	local_irq_save(flags);
-	if (info->ioapic_entry)
-		mp_setup_entry(cfg, data, info->ioapic_entry);
+	if (info->ioapic.entry)
+		mp_setup_entry(cfg, data, info->ioapic.entry);
 	mp_register_handler(virq, data->trigger);
 	if (virq < nr_legacy_irqs())
 		legacy_pic->mask(virq);
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index a0e8fc7d85f1..ddffd80f5c52 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -229,8 +229,8 @@ static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
 
 	it = &of_ioapic_type[type_index];
 	ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->trigger, it->polarity);
-	tmp.ioapic_id = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
-	tmp.ioapic_pin = fwspec->param[0];
+	tmp.devid = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
+	tmp.ioapic.pin = fwspec->param[0];
 
 	return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
 }
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index a3084729a532..8183a7102b92 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3522,7 +3522,7 @@ static int get_devid(struct irq_alloc_info *info)
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC:
 	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
-		return get_ioapic_devid(info->ioapic_id);
+		return get_ioapic_devid(info->devid);
 	case X86_IRQ_ALLOC_TYPE_HPET:
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
 		return get_hpet_devid(info->devid);
@@ -3600,15 +3600,15 @@ static void irq_remapping_prepare_irte(struct amd_ir_data *data,
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC:
 		/* Setup IOAPIC entry */
-		entry = info->ioapic_entry;
-		info->ioapic_entry = NULL;
+		entry = info->ioapic.entry;
+		info->ioapic.entry = NULL;
 		memset(entry, 0, sizeof(*entry));
 		entry->vector        = index;
 		entry->mask          = 0;
-		entry->trigger       = info->ioapic_trigger;
-		entry->polarity      = info->ioapic_polarity;
+		entry->trigger       = info->ioapic.trigger;
+		entry->polarity      = info->ioapic.polarity;
 		/* Mask level triggered irqs. */
-		if (info->ioapic_trigger)
+		if (info->ioapic.trigger)
 			entry->mask = 1;
 		break;
 
@@ -3694,7 +3694,7 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 					iommu->irte_ops->set_allocated(table, i);
 			}
 			WARN_ON(table->min_index != 32);
-			index = info->ioapic_pin;
+			index = info->ioapic.pin;
 		} else {
 			index = -ENOMEM;
 		}
diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index dc82a1dbcb7c..e09e2d734c57 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -101,7 +101,7 @@ static int hyperv_irq_remapping_alloc(struct irq_domain *domain,
 	 * in the chip_data and hyperv_irq_remapping_activate()/hyperv_ir_set_
 	 * affinity() set vector and dest_apicid directly into IO-APIC entry.
 	 */
-	irq_data->chip_data = info->ioapic_entry;
+	irq_data->chip_data = info->ioapic.entry;
 
 	/*
 	 * Hypver-V IO APIC irq affinity should be in the scope of
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 58c2d7a57370..90ba70d66975 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1119,7 +1119,7 @@ static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
 
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
-		return map_ioapic_to_ir(info->ioapic_id);
+		return map_ioapic_to_ir(info->devid);
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
 		return map_hpet_to_ir(info->devid);
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
@@ -1260,16 +1260,16 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC:
 		/* Set source-id of interrupt request */
-		set_ioapic_sid(irte, info->ioapic_id);
+		set_ioapic_sid(irte, info->devid);
 		apic_printk(APIC_VERBOSE, KERN_DEBUG "IOAPIC[%d]: Set IRTE entry (P:%d FPD:%d Dst_Mode:%d Redir_hint:%d Trig_Mode:%d Dlvry_Mode:%X Avail:%X Vector:%02X Dest:%08X SID:%04X SQ:%X SVT:%X)\n",
-			info->ioapic_id, irte->present, irte->fpd,
+			info->devid, irte->present, irte->fpd,
 			irte->dst_mode, irte->redir_hint,
 			irte->trigger_mode, irte->dlvry_mode,
 			irte->avail, irte->vector, irte->dest_id,
 			irte->sid, irte->sq, irte->svt);
 
-		entry = (struct IR_IO_APIC_route_entry *)info->ioapic_entry;
-		info->ioapic_entry = NULL;
+		entry = (struct IR_IO_APIC_route_entry *)info->ioapic.entry;
+		info->ioapic.entry = NULL;
 		memset(entry, 0, sizeof(*entry));
 		entry->index2	= (index >> 15) & 0x1;
 		entry->zero	= 0;
@@ -1279,11 +1279,11 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 		 * IO-APIC RTE will be configured with virtual vector.
 		 * irq handler will do the explicit EOI to the io-apic.
 		 */
-		entry->vector	= info->ioapic_pin;
+		entry->vector	= info->ioapic.pin;
 		entry->mask	= 0;			/* enable IRQ */
-		entry->trigger	= info->ioapic_trigger;
-		entry->polarity	= info->ioapic_polarity;
-		if (info->ioapic_trigger)
+		entry->trigger	= info->ioapic.trigger;
+		entry->polarity	= info->ioapic.polarity;
+		if (info->ioapic.trigger)
 			entry->mask = 1; /* Mask level triggered irqs. */
 		break;
 
-- 
cgit v1.2.3


From 3b9c1d377d67072d1d8a2373b4969103cca00dab Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:46 +0200
Subject: x86/msi: Consolidate MSI allocation

Convert the interrupt remap drivers to retrieve the pci device from the msi
descriptor and use info::hwirq.

This is the first step to prepare x86 for using the generic MSI domain ops.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Wei Liu <wei.liu@kernel.org>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112332.466405395@linutronix.de
---
 arch/x86/include/asm/hw_irq.h       | 8 --------
 arch/x86/kernel/apic/msi.c          | 7 +++----
 drivers/iommu/amd/iommu.c           | 5 +++--
 drivers/iommu/intel/irq_remapping.c | 4 ++--
 drivers/pci/controller/pci-hyperv.c | 2 +-
 5 files changed, 9 insertions(+), 17 deletions(-)

(limited to 'drivers/iommu')

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index dd0b479ad980..a4aeeaace040 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -86,14 +86,6 @@ struct irq_alloc_info {
 	union {
 		struct ioapic_alloc_info	ioapic;
 		struct uv_alloc_info		uv;
-
-		int		unused;
-#ifdef	CONFIG_PCI_MSI
-		struct {
-			struct pci_dev	*msi_dev;
-			irq_hw_number_t	msi_hwirq;
-		};
-#endif
 	};
 };
 
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 6d7655b07f84..6b490d9a2537 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -188,7 +188,6 @@ int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_PCI_MSI;
-	info.msi_dev = dev;
 
 	domain = irq_remapping_get_irq_domain(&info);
 	if (domain == NULL)
@@ -207,7 +206,7 @@ void native_teardown_msi_irq(unsigned int irq)
 static irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info,
 					 msi_alloc_info_t *arg)
 {
-	return arg->msi_hwirq;
+	return arg->hwirq;
 }
 
 int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
@@ -217,7 +216,6 @@ int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
 	struct msi_desc *desc = first_pci_msi_entry(pdev);
 
 	init_irq_alloc_info(arg, NULL);
-	arg->msi_dev = pdev;
 	if (desc->msi_attrib.is_msix) {
 		arg->type = X86_IRQ_ALLOC_TYPE_PCI_MSIX;
 	} else {
@@ -231,7 +229,8 @@ EXPORT_SYMBOL_GPL(pci_msi_prepare);
 
 void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc)
 {
-	arg->msi_hwirq = pci_msi_domain_calc_hwirq(desc);
+	arg->desc = desc;
+	arg->hwirq = pci_msi_domain_calc_hwirq(desc);
 }
 EXPORT_SYMBOL_GPL(pci_msi_set_desc);
 
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 8183a7102b92..bc7bb4ccff1f 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3528,7 +3528,7 @@ static int get_devid(struct irq_alloc_info *info)
 		return get_hpet_devid(info->devid);
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		return get_device_id(&info->msi_dev->dev);
+		return get_device_id(msi_desc_to_dev(info->desc));
 	default:
 		WARN_ON_ONCE(1);
 		return -1;
@@ -3702,7 +3702,8 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 		   info->type == X86_IRQ_ALLOC_TYPE_PCI_MSIX) {
 		bool align = (info->type == X86_IRQ_ALLOC_TYPE_PCI_MSI);
 
-		index = alloc_irq_index(devid, nr_irqs, align, info->msi_dev);
+		index = alloc_irq_index(devid, nr_irqs, align,
+					msi_desc_to_pci_dev(info->desc));
 	} else {
 		index = alloc_irq_index(devid, nr_irqs, false, NULL);
 	}
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 90ba70d66975..d9db2f37b831 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1124,7 +1124,7 @@ static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
 		return map_hpet_to_ir(info->devid);
 	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
 	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		return map_dev_to_ir(info->msi_dev);
+		return map_dev_to_ir(msi_desc_to_pci_dev(info->desc));
 	default:
 		WARN_ON_ONCE(1);
 		return NULL;
@@ -1293,7 +1293,7 @@ static void intel_irq_remapping_prepare_irte(struct intel_ir_data *data,
 		if (info->type == X86_IRQ_ALLOC_TYPE_HPET)
 			set_hpet_sid(irte, info->devid);
 		else
-			set_msi_sid(irte, info->msi_dev);
+			set_msi_sid(irte, msi_desc_to_pci_dev(info->desc));
 
 		msg->address_hi = MSI_ADDR_BASE_HI;
 		msg->data = sub_handle;
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index fc4c3a15e570..f6cc49ba6e80 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1534,7 +1534,7 @@ static struct irq_chip hv_msi_irq_chip = {
 static irq_hw_number_t hv_msi_domain_ops_get_hwirq(struct msi_domain_info *info,
 						   msi_alloc_info_t *arg)
 {
-	return arg->msi_hwirq;
+	return arg->hwirq;
 }
 
 static struct msi_domain_ops hv_msi_ops = {
-- 
cgit v1.2.3


From 85a8dfc57a0b96785881735e09a61a0fde911ca4 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:16:59 +0200
Subject: iommm/vt-d: Store irq domain in struct device

As a first step to make X86 utilize the direct MSI irq domain operations
store the irq domain pointer in the device struct when a device is probed.

This is done from dmar_pci_bus_add_dev() because it has to work even when
DMA remapping is disabled. It only overrides the irqdomain of devices which
are handled by a regular PCI/MSI irq domain which protects PCI devices
behind special busses like VMD which have their own irq domain.

No functional change. It just avoids the redirection through
arch_*_msi_irqs() and allows the PCI/MSI core to directly invoke the irq
domain alloc/free functions instead of having to look up the irq domain for
every single MSI interupt.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112333.714566121@linutronix.de
---
 drivers/iommu/intel/dmar.c          |  3 +++
 drivers/iommu/intel/irq_remapping.c | 16 ++++++++++++++++
 include/linux/intel-iommu.h         |  7 +++++++
 3 files changed, 26 insertions(+)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 93e6345f3414..4dc09edef744 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -316,6 +316,9 @@ static int dmar_pci_bus_add_dev(struct dmar_pci_notify_info *info)
 	if (ret < 0 && dmar_dev_scope_status == 0)
 		dmar_dev_scope_status = ret;
 
+	if (ret >= 0)
+		intel_irq_remap_add_device(info);
+
 	return ret;
 }
 
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index d9db2f37b831..68692a4188db 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1092,6 +1092,22 @@ error:
 	return -1;
 }
 
+/*
+ * Store the MSI remapping domain pointer in the device if enabled.
+ *
+ * This is called from dmar_pci_bus_add_dev() so it works even when DMA
+ * remapping is disabled. Only update the pointer if the device is not
+ * already handled by a non default PCI/MSI interrupt domain. This protects
+ * e.g. VMD devices.
+ */
+void intel_irq_remap_add_device(struct dmar_pci_notify_info *info)
+{
+	if (!irq_remapping_enabled || pci_dev_has_special_msi_domain(info->dev))
+		return;
+
+	dev_set_msi_domain(&info->dev->dev, map_dev_to_ir(info->dev));
+}
+
 static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
 {
 	memset(irte, 0, sizeof(*irte));
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index b1ed2f25f7c0..46f5aaaa66ff 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -425,6 +425,8 @@ struct q_inval {
 	int             free_cnt;
 };
 
+struct dmar_pci_notify_info;
+
 #ifdef CONFIG_IRQ_REMAP
 /* 1MB - maximum possible interrupt remapping table size */
 #define INTR_REMAP_PAGE_ORDER	8
@@ -439,6 +441,11 @@ struct ir_table {
 	struct irte *base;
 	unsigned long *bitmap;
 };
+
+void intel_irq_remap_add_device(struct dmar_pci_notify_info *info);
+#else
+static inline void
+intel_irq_remap_add_device(struct dmar_pci_notify_info *info) { }
 #endif
 
 struct iommu_flush {
-- 
cgit v1.2.3


From 2b2c6aa63824c69c112bbe4f937f034c5e606a6c Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:17:00 +0200
Subject: iommm/amd: Store irq domain in struct device

As the next step to make X86 utilize the direct MSI irq domain operations
store the irq domain pointer in the device struct when a device is probed.

It only overrides the irqdomain of devices which are handled by a regular
PCI/MSI irq domain which protects PCI devices behind special busses like
VMD which have their own irq domain.

No functional change.

It just avoids the redirection through arch_*_msi_irqs() and allows the
PCI/MSI core to directly invoke the irq domain alloc/free functions instead
of having to look up the irq domain for every single MSI interupt.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112333.806328762@linutronix.de
---
 drivers/iommu/amd/iommu.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index bc7bb4ccff1f..a9d8b32a8476 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -729,7 +729,21 @@ static void iommu_poll_ga_log(struct amd_iommu *iommu)
 		}
 	}
 }
-#endif /* CONFIG_IRQ_REMAP */
+
+static void
+amd_iommu_set_pci_msi_domain(struct device *dev, struct amd_iommu *iommu)
+{
+	if (!irq_remapping_enabled || !dev_is_pci(dev) ||
+	    pci_dev_has_special_msi_domain(to_pci_dev(dev)))
+		return;
+
+	dev_set_msi_domain(dev, iommu->msi_domain);
+}
+
+#else /* CONFIG_IRQ_REMAP */
+static inline void
+amd_iommu_set_pci_msi_domain(struct device *dev, struct amd_iommu *iommu) { }
+#endif /* !CONFIG_IRQ_REMAP */
 
 #define AMD_IOMMU_INT_MASK	\
 	(MMIO_STATUS_EVT_INT_MASK | \
@@ -2157,6 +2171,7 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
 		iommu_dev = ERR_PTR(ret);
 		iommu_ignore_device(dev);
 	} else {
+		amd_iommu_set_pci_msi_domain(dev, iommu);
 		iommu_dev = &iommu->iommu;
 	}
 
-- 
cgit v1.2.3


From 9f0ffb4bb3008e56fcd7ad5ff24467a8b7f1f2e7 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:17:05 +0200
Subject: iommu/vt-d: Remove domain search for PCI/MSI[X]

Now that the domain can be retrieved through device::msi_domain the domain
search for PCI_MSI[X] is not longer required. Remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112334.305699301@linutronix.de
---
 drivers/iommu/intel/irq_remapping.c | 3 ---
 1 file changed, 3 deletions(-)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 68692a4188db..0cfce1d3b7bb 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1138,9 +1138,6 @@ static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
 		return map_ioapic_to_ir(info->devid);
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
 		return map_hpet_to_ir(info->devid);
-	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
-	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		return map_dev_to_ir(msi_desc_to_pci_dev(info->desc));
 	default:
 		WARN_ON_ONCE(1);
 		return NULL;
-- 
cgit v1.2.3


From bc95fd0d7c4273034b9486aaf369777eaaa00cb7 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 13:17:06 +0200
Subject: iommu/amd: Remove domain search for PCI/MSI

Now that the domain can be retrieved through device::msi_domain the domain
search for PCI_MSI[X] is not longer required. Remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200826112334.400700807@linutronix.de
---
 drivers/iommu/amd/iommu.c | 3 ---
 1 file changed, 3 deletions(-)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index a9d8b32a8476..ef64e01f66d7 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3562,9 +3562,6 @@ static struct irq_domain *get_irq_domain_for_devid(struct irq_alloc_info *info,
 	case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
 	case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
 		return iommu->ir_domain;
-	case X86_IRQ_ALLOC_TYPE_PCI_MSI:
-	case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
-		return iommu->msi_domain;
 	default:
 		WARN_ON_ONCE(1);
 		return NULL;
-- 
cgit v1.2.3