Merge branch 'x86/amd-avic' into x86/amd

6 files changed, 801 insertions, 66 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 46c030a49186..748ef7bdd64d 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -460,6 +460,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			driver will print ACPI tables for AMD IOMMU during
 			IOMMU initialization.
 
+	amd_iommu_intr=	[HW,X86-64]
+			Specifies one of the following AMD IOMMU interrupt
+			remapping modes:
+			legacy     - Use legacy interrupt remapping mode.
+			vapic      - Use virtual APIC mode, which allows IOMMU
+			             to inject interrupts directly into guest.
+			             This mode requires kvm-amd.avic=1.
+			             (Default when IOMMU HW support is present.)
+
 	amijoy.map=	[HW,JOY] Amiga joystick support
 			Map of devices attached to JOY0DAT and JOY1DAT
 			Format: <a>,<b>
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 2bcaca53aba5..bebe728019af 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -137,6 +137,7 @@ struct iommu_dev_data {
 	bool pri_tlp;			  /* PASID TLB required for
 					     PPR completions */
 	u32 errata;			  /* Bitmap for errata to apply */
+	bool use_vapic;			  /* Enable device to use vapic mode */
 };
 
 /*
@@ -707,14 +708,74 @@ static void iommu_poll_ppr_log(struct amd_iommu *iommu)
 	}
 }
 
+#ifdef CONFIG_IRQ_REMAP
+static int (*iommu_ga_log_notifier)(u32);
+
+int amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
+{
+	iommu_ga_log_notifier = notifier;
+
+	return 0;
+}
+EXPORT_SYMBOL(amd_iommu_register_ga_log_notifier);
+
+static void iommu_poll_ga_log(struct amd_iommu *iommu)
+{
+	u32 head, tail, cnt = 0;
+
+	if (iommu->ga_log == NULL)
+		return;
+
+	head = readl(iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
+	tail = readl(iommu->mmio_base + MMIO_GA_TAIL_OFFSET);
+
+	while (head != tail) {
+		volatile u64 *raw;
+		u64 log_entry;
+
+		raw = (u64 *)(iommu->ga_log + head);
+		cnt++;
+
+		/* Avoid memcpy function-call overhead */
+		log_entry = *raw;
+
+		/* Update head pointer of hardware ring-buffer */
+		head = (head + GA_ENTRY_SIZE) % GA_LOG_SIZE;
+		writel(head, iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
+
+		/* Handle GA entry */
+		switch (GA_REQ_TYPE(log_entry)) {
+		case GA_GUEST_NR:
+			if (!iommu_ga_log_notifier)
+				break;
+
+			pr_debug("AMD-Vi: %s: devid=%#x, ga_tag=%#x\n",
+				 __func__, GA_DEVID(log_entry),
+				 GA_TAG(log_entry));
+
+			if (iommu_ga_log_notifier(GA_TAG(log_entry)) != 0)
+				pr_err("AMD-Vi: GA log notifier failed.\n");
+			break;
+		default:
+			break;
+		}
+	}
+}
+#endif /* CONFIG_IRQ_REMAP */
+
+#define AMD_IOMMU_INT_MASK	\
+	(MMIO_STATUS_EVT_INT_MASK | \
+	 MMIO_STATUS_PPR_INT_MASK | \
+	 MMIO_STATUS_GALOG_INT_MASK)
+
 irqreturn_t amd_iommu_int_thread(int irq, void *data)
 {
 	struct amd_iommu *iommu = (struct amd_iommu *) data;
 	u32 status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
 
-	while (status & (MMIO_STATUS_EVT_INT_MASK | MMIO_STATUS_PPR_INT_MASK)) {
-		/* Enable EVT and PPR interrupts again */
-		writel((MMIO_STATUS_EVT_INT_MASK | MMIO_STATUS_PPR_INT_MASK),
+	while (status & AMD_IOMMU_INT_MASK) {
+		/* Enable EVT and PPR and GA interrupts again */
+		writel(AMD_IOMMU_INT_MASK,
 			iommu->mmio_base + MMIO_STATUS_OFFSET);
 
 		if (status & MMIO_STATUS_EVT_INT_MASK) {
@@ -727,6 +788,13 @@ irqreturn_t amd_iommu_int_thread(int irq, void *data)
 			iommu_poll_ppr_log(iommu);
 		}
 
+#ifdef CONFIG_IRQ_REMAP
+		if (status & MMIO_STATUS_GALOG_INT_MASK) {
+			pr_devel("AMD-Vi: Processing IOMMU GA Log\n");
+			iommu_poll_ga_log(iommu);
+		}
+#endif
+
 		/*
 		 * Hardware bug: ERBT1312
 		 * When re-enabling interrupt (by writing 1
@@ -2948,6 +3016,12 @@ static void amd_iommu_detach_device(struct iommu_domain *dom,
 	if (!iommu)
 		return;
 
+#ifdef CONFIG_IRQ_REMAP
+	if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) &&
+	    (dom->type == IOMMU_DOMAIN_UNMANAGED))
+		dev_data->use_vapic = 0;
+#endif
+
 	iommu_completion_wait(iommu);
 }
 
@@ -2973,6 +3047,15 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
 
 	ret = attach_device(dev, domain);
 
+#ifdef CONFIG_IRQ_REMAP
+	if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir)) {
+		if (dom->type == IOMMU_DOMAIN_UNMANAGED)
+			dev_data->use_vapic = 1;
+		else
+			dev_data->use_vapic = 0;
+	}
+#endif
+
 	iommu_completion_wait(iommu);
 
 	return ret;
@@ -3511,34 +3594,6 @@ EXPORT_SYMBOL(amd_iommu_device_info);
  *
  *****************************************************************************/
 
-union irte {
-	u32 val;
-	struct {
-		u32 valid	: 1,
-		    no_fault	: 1,
-		    int_type	: 3,
-		    rq_eoi	: 1,
-		    dm		: 1,
-		    rsvd_1	: 1,
-		    destination	: 8,
-		    vector	: 8,
-		    rsvd_2	: 8;
-	} fields;
-};
-
-struct irq_2_irte {
-	u16 devid; /* Device ID for IRTE table */
-	u16 index; /* Index into IRTE table*/
-};
-
-struct amd_ir_data {
-	struct irq_2_irte			irq_2_irte;
-	union irte				irte_entry;
-	union {
-		struct msi_msg			msi_entry;
-	};
-};
-
 static struct irq_chip amd_ir_chip;
 
 #define DTE_IRQ_PHYS_ADDR_MASK	(((1ULL << 45)-1) << 6)
@@ -3560,8 +3615,6 @@ static void set_dte_irq_entry(u16 devid, struct irq_remap_table *table)
 	amd_iommu_dev_table[devid].data[2] = dte;
 }
 
-#define IRTE_ALLOCATED (~1U)
-
 static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic)
 {
 	struct irq_remap_table *table = NULL;
@@ -3607,13 +3660,18 @@ static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic)
 		goto out;
 	}
 
-	memset(table->table, 0, MAX_IRQS_PER_TABLE * sizeof(u32));
+	if (!AMD_IOMMU_GUEST_IR_GA(amd_iommu_guest_ir))
+		memset(table->table, 0,
+		       MAX_IRQS_PER_TABLE * sizeof(u32));
+	else
+		memset(table->table, 0,
+		       (MAX_IRQS_PER_TABLE * (sizeof(u64) * 2)));
 
 	if (ioapic) {
 		int i;
 
 		for (i = 0; i < 32; ++i)
-			table->table[i] = IRTE_ALLOCATED;
+			iommu->irte_ops->set_allocated(table, i);
 	}
 
 	irq_lookup_table[devid] = table;
@@ -3639,6 +3697,10 @@ static int alloc_irq_index(u16 devid, int count)
 	struct irq_remap_table *table;
 	unsigned long flags;
 	int index, c;
+	struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
+
+	if (!iommu)
+		return -ENODEV;
 
 	table = get_irq_table(devid, false);
 	if (!table)
@@ -3650,14 +3712,14 @@ static int alloc_irq_index(u16 devid, int count)
 	for (c = 0, index = table->min_index;
 	     index < MAX_IRQS_PER_TABLE;
 	     ++index) {
-		if (table->table[index] == 0)
+		if (!iommu->irte_ops->is_allocated(table, index))
 			c += 1;
 		else
 			c = 0;
 
 		if (c == count)	{
 			for (; c != 0; --c)
-				table->table[index - c + 1] = IRTE_ALLOCATED;
+				iommu->irte_ops->set_allocated(table, index - c + 1);
 
 			index -= count - 1;
 			goto out;
@@ -3672,7 +3734,42 @@ out:
 	return index;
 }
 
-static int modify_irte(u16 devid, int index, union irte irte)
+static int modify_irte_ga(u16 devid, int index, struct irte_ga *irte,
+			  struct amd_ir_data *data)
+{
+	struct irq_remap_table *table;
+	struct amd_iommu *iommu;
+	unsigned long flags;
+	struct irte_ga *entry;
+
+	iommu = amd_iommu_rlookup_table[devid];
+	if (iommu == NULL)
+		return -EINVAL;
+
+	table = get_irq_table(devid, false);
+	if (!table)
+		return -ENOMEM;
+
+	spin_lock_irqsave(&table->lock, flags);
+
+	entry = (struct irte_ga *)table->table;
+	entry = &entry[index];
+	entry->lo.fields_remap.valid = 0;
+	entry->hi.val = irte->hi.val;
+	entry->lo.val = irte->lo.val;
+	entry->lo.fields_remap.valid = 1;
+	if (data)
+		data->ref = entry;
+
+	spin_unlock_irqrestore(&table->lock, flags);
+
+	iommu_flush_irt(iommu, devid);
+	iommu_completion_wait(iommu);
+
+	return 0;
+}
+
+static int modify_irte(u16 devid, int index, union irte *irte)
 {
 	struct irq_remap_table *table;
 	struct amd_iommu *iommu;
@@ -3687,7 +3784,7 @@ static int modify_irte(u16 devid, int index, union irte irte)
 		return -ENOMEM;
 
 	spin_lock_irqsave(&table->lock, flags);
-	table->table[index] = irte.val;
+	table->table[index] = irte->val;
 	spin_unlock_irqrestore(&table->lock, flags);
 
 	iommu_flush_irt(iommu, devid);
@@ -3711,13 +3808,146 @@ static void free_irte(u16 devid, int index)
 		return;
 
 	spin_lock_irqsave(&table->lock, flags);
-	table->table[index] = 0;
+	iommu->irte_ops->clear_allocated(table, index);
 	spin_unlock_irqrestore(&table->lock, flags);
 
 	iommu_flush_irt(iommu, devid);
 	iommu_completion_wait(iommu);
 }
 
+static void irte_prepare(void *entry,
+			 u32 delivery_mode, u32 dest_mode,
+			 u8 vector, u32 dest_apicid, int devid)
+{
+	union irte *irte = (union irte *) entry;
+
+	irte->val                = 0;
+	irte->fields.vector      = vector;
+	irte->fields.int_type    = delivery_mode;
+	irte->fields.destination = dest_apicid;
+	irte->fields.dm          = dest_mode;
+	irte->fields.valid       = 1;
+}
+
+static void irte_ga_prepare(void *entry,
+			    u32 delivery_mode, u32 dest_mode,
+			    u8 vector, u32 dest_apicid, int devid)
+{
+	struct irte_ga *irte = (struct irte_ga *) entry;
+	struct iommu_dev_data *dev_data = search_dev_data(devid);
+
+	irte->lo.val                      = 0;
+	irte->hi.val                      = 0;
+	irte->lo.fields_remap.guest_mode  = dev_data ? dev_data->use_vapic : 0;
+	irte->lo.fields_remap.int_type    = delivery_mode;
+	irte->lo.fields_remap.dm          = dest_mode;
+	irte->hi.fields.vector            = vector;
+	irte->lo.fields_remap.destination = dest_apicid;
+	irte->lo.fields_remap.valid       = 1;
+}
+
+static void irte_activate(void *entry, u16 devid, u16 index)
+{
+	union irte *irte = (union irte *) entry;
+
+	irte->fields.valid = 1;
+	modify_irte(devid, index, irte);
+}
+
+static void irte_ga_activate(void *entry, u16 devid, u16 index)
+{
+	struct irte_ga *irte = (struct irte_ga *) entry;
+
+	irte->lo.fields_remap.valid = 1;
+	modify_irte_ga(devid, index, irte, NULL);
+}
+
+static void irte_deactivate(void *entry, u16 devid, u16 index)
+{
+	union irte *irte = (union irte *) entry;
+
+	irte->fields.valid = 0;
+	modify_irte(devid, index, irte);
+}
+
+static void irte_ga_deactivate(void *entry, u16 devid, u16 index)
+{
+	struct irte_ga *irte = (struct irte_ga *) entry;
+
+	irte->lo.fields_remap.valid = 0;
+	modify_irte_ga(devid, index, irte, NULL);
+}
+
+static void irte_set_affinity(void *entry, u16 devid, u16 index,
+			      u8 vector, u32 dest_apicid)
+{
+	union irte *irte = (union irte *) entry;
+
+	irte->fields.vector = vector;
+	irte->fields.destination = dest_apicid;
+	modify_irte(devid, index, irte);
+}
+
+static void irte_ga_set_affinity(void *entry, u16 devid, u16 index,
+				 u8 vector, u32 dest_apicid)
+{
+	struct irte_ga *irte = (struct irte_ga *) entry;
+	struct iommu_dev_data *dev_data = search_dev_data(devid);
+
+	if (!dev_data || !dev_data->use_vapic) {
+		irte->hi.fields.vector = vector;
+		irte->lo.fields_remap.destination = dest_apicid;
+		irte->lo.fields_remap.guest_mode = 0;
+		modify_irte_ga(devid, index, irte, NULL);
+	}
+}
+
+#define IRTE_ALLOCATED (~1U)
+static void irte_set_allocated(struct irq_remap_table *table, int index)
+{
+	table->table[index] = IRTE_ALLOCATED;
+}
+
+static void irte_ga_set_allocated(struct irq_remap_table *table, int index)
+{
+	struct irte_ga *ptr = (struct irte_ga *)table->table;
+	struct irte_ga *irte = &ptr[index];
+
+	memset(&irte->lo.val, 0, sizeof(u64));
+	memset(&irte->hi.val, 0, sizeof(u64));
+	irte->hi.fields.vector = 0xff;
+}
+
+static bool irte_is_allocated(struct irq_remap_table *table, int index)
+{
+	union irte *ptr = (union irte *)table->table;
+	union irte *irte = &ptr[index];
+
+	return irte->val != 0;
+}
+
+static bool irte_ga_is_allocated(struct irq_remap_table *table, int index)
+{
+	struct irte_ga *ptr = (struct irte_ga *)table->table;
+	struct irte_ga *irte = &ptr[index];
+
+	return irte->hi.fields.vector != 0;
+}
+
+static void irte_clear_allocated(struct irq_remap_table *table, int index)
+{
+	table->table[index] = 0;
+}
+
+static void irte_ga_clear_allocated(struct irq_remap_table *table, int index)
+{
+	struct irte_ga *ptr = (struct irte_ga *)table->table;
+	struct irte_ga *irte = &ptr[index];
+
+	memset(&irte->lo.val, 0, sizeof(u64));
+	memset(&irte->hi.val, 0, sizeof(u64));
+}
+
 static int get_devid(struct irq_alloc_info *info)
 {
 	int devid = -1;
@@ -3802,19 +4032,17 @@ static void irq_remapping_prepare_irte(struct amd_ir_data *data,
 {
 	struct irq_2_irte *irte_info = &data->irq_2_irte;
 	struct msi_msg *msg = &data->msi_entry;
-	union irte *irte = &data->irte_entry;
 	struct IO_APIC_route_entry *entry;
+	struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
+
+	if (!iommu)
+		return;
 
 	data->irq_2_irte.devid = devid;
 	data->irq_2_irte.index = index + sub_handle;
-
-	/* Setup IRTE for IOMMU */
-	irte->val = 0;
-	irte->fields.vector      = irq_cfg->vector;
-	irte->fields.int_type    = apic->irq_delivery_mode;
-	irte->fields.destination = irq_cfg->dest_apicid;
-	irte->fields.dm          = apic->irq_dest_mode;
-	irte->fields.valid       = 1;
+	iommu->irte_ops->prepare(data->entry, apic->irq_delivery_mode,
+				 apic->irq_dest_mode, irq_cfg->vector,
+				 irq_cfg->dest_apicid, devid);
 
 	switch (info->type) {
 	case X86_IRQ_ALLOC_TYPE_IOAPIC:
@@ -3845,12 +4073,32 @@ static void irq_remapping_prepare_irte(struct amd_ir_data *data,
 	}
 }
 
+struct amd_irte_ops irte_32_ops = {
+	.prepare = irte_prepare,
+	.activate = irte_activate,
+	.deactivate = irte_deactivate,
+	.set_affinity = irte_set_affinity,
+	.set_allocated = irte_set_allocated,
+	.is_allocated = irte_is_allocated,
+	.clear_allocated = irte_clear_allocated,
+};
+
+struct amd_irte_ops irte_128_ops = {
+	.prepare = irte_ga_prepare,
+	.activate = irte_ga_activate,
+	.deactivate = irte_ga_deactivate,
+	.set_affinity = irte_ga_set_affinity,
+	.set_allocated = irte_ga_set_allocated,
+	.is_allocated = irte_ga_is_allocated,
+	.clear_allocated = irte_ga_clear_allocated,
+};
+
 static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 			       unsigned int nr_irqs, void *arg)
 {
 	struct irq_alloc_info *info = arg;
 	struct irq_data *irq_data;
-	struct amd_ir_data *data;
+	struct amd_ir_data *data = NULL;
 	struct irq_cfg *cfg;
 	int i, ret, devid;
 	int index = -1;
@@ -3903,6 +4151,16 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
 		if (!data)
 			goto out_free_data;
 
+		if (!AMD_IOMMU_GUEST_IR_GA(amd_iommu_guest_ir))
+			data->entry = kzalloc(sizeof(union irte), GFP_KERNEL);
+		else
+			data->entry = kzalloc(sizeof(struct irte_ga),
+						     GFP_KERNEL);
+		if (!data->entry) {
+			kfree(data);
+			goto out_free_data;
+		}
+
 		irq_data->hwirq = (devid << 16) + i;
 		irq_data->chip_data = data;
 		irq_data->chip = &amd_ir_chip;
@@ -3939,6 +4197,7 @@ static void irq_remapping_free(struct irq_domain *domain, unsigned int virq,
 			data = irq_data->chip_data;
 			irte_info = &data->irq_2_irte;
 			free_irte(irte_info->devid, irte_info->index);
+			kfree(data->entry);
 			kfree(data);
 		}
 	}
@@ -3950,8 +4209,11 @@ static void irq_remapping_activate(struct irq_domain *domain,
 {
 	struct amd_ir_data *data = irq_data->chip_data;
 	struct irq_2_irte *irte_info = &data->irq_2_irte;
+	struct amd_iommu *iommu = amd_iommu_rlookup_table[irte_info->devid];
 
-	modify_irte(irte_info->devid, irte_info->index, data->irte_entry);
+	if (iommu)
+		iommu->irte_ops->activate(data->entry, irte_info->devid,
+					  irte_info->index);
 }
 
 static void irq_remapping_deactivate(struct irq_domain *domain,
@@ -3959,10 +4221,11 @@ static void irq_remapping_deactivate(struct irq_domain *domain,
 {
 	struct amd_ir_data *data = irq_data->chip_data;
 	struct irq_2_irte *irte_info = &data->irq_2_irte;
-	union irte entry;
+	struct amd_iommu *iommu = amd_iommu_rlookup_table[irte_info->devid];
 
-	entry.val = 0;
-	modify_irte(irte_info->devid, irte_info->index, data->irte_entry);
+	if (iommu)
+		iommu->irte_ops->deactivate(data->entry, irte_info->devid,
+					    irte_info->index);
 }
 
 static struct irq_domain_ops amd_ir_domain_ops = {
@@ -3972,6 +4235,70 @@ static struct irq_domain_ops amd_ir_domain_ops = {
 	.deactivate = irq_remapping_deactivate,
 };
 
+static int amd_ir_set_vcpu_affinity(struct irq_data *data, void *vcpu_info)
+{
+	struct amd_iommu *iommu;
+	struct amd_iommu_pi_data *pi_data = vcpu_info;
+	struct vcpu_data *vcpu_pi_info = pi_data->vcpu_data;
+	struct amd_ir_data *ir_data = data->chip_data;
+	struct irte_ga *irte = (struct irte_ga *) ir_data->entry;
+	struct irq_2_irte *irte_info = &ir_data->irq_2_irte;
+	struct iommu_dev_data *dev_data = search_dev_data(irte_info->devid);
+
+	/* Note:
+	 * This device has never been set up for guest mode.
+	 * we should not modify the IRTE
+	 */
+	if (!dev_data || !dev_data->use_vapic)
+		return 0;
+
+	pi_data->ir_data = ir_data;
+
+	/* Note:
+	 * SVM tries to set up for VAPIC mode, but we are in
+	 * legacy mode. So, we force legacy mode instead.
+	 */
+	if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir)) {
+		pr_debug("AMD-Vi: %s: Fall back to using intr legacy remap\n",
+			 __func__);
+		pi_data->is_guest_mode = false;
+	}
+
+	iommu = amd_iommu_rlookup_table[irte_info->devid];
+	if (iommu == NULL)
+		return -EINVAL;
+
+	pi_data->prev_ga_tag = ir_data->cached_ga_tag;
+	if (pi_data->is_guest_mode) {
+		/* Setting */
+		irte->hi.fields.ga_root_ptr = (pi_data->base >> 12);
+		irte->hi.fields.vector = vcpu_pi_info->vector;
+		irte->lo.fields_vapic.guest_mode = 1;
+		irte->lo.fields_vapic.ga_tag = pi_data->ga_tag;
+
+		ir_data->cached_ga_tag = pi_data->ga_tag;
+	} else {
+		/* Un-Setting */
+		struct irq_cfg *cfg = irqd_cfg(data);
+
+		irte->hi.val = 0;
+		irte->lo.val = 0;
+		irte->hi.fields.vector = cfg->vector;
+		irte->lo.fields_remap.guest_mode = 0;
+		irte->lo.fields_remap.destination = cfg->dest_apicid;
+		irte->lo.fields_remap.int_type = apic->irq_delivery_mode;
+		irte->lo.fields_remap.dm = apic->irq_dest_mode;
+
+		/*
+		 * This communicates the ga_tag back to the caller
+		 * so that it can do all the necessary clean up.
+		 */
+		ir_data->cached_ga_tag = 0;
+	}
+
+	return modify_irte_ga(irte_info->devid, irte_info->index, irte, ir_data);
+}
+
 static int amd_ir_set_affinity(struct irq_data *data,
 			       const struct cpumask *mask, bool force)
 {
@@ -3979,8 +4306,12 @@ static int amd_ir_set_affinity(struct irq_data *data,
 	struct irq_2_irte *irte_info = &ir_data->irq_2_irte;
 	struct irq_cfg *cfg = irqd_cfg(data);
 	struct irq_data *parent = data->parent_data;
+	struct amd_iommu *iommu = amd_iommu_rlookup_table[irte_info->devid];
 	int ret;
 
+	if (!iommu)
+		return -ENODEV;
+
 	ret = parent->chip->irq_set_affinity(parent, mask, force);
 	if (ret < 0 || ret == IRQ_SET_MASK_OK_DONE)
 		return ret;
@@ -3989,9 +4320,8 @@ static int amd_ir_set_affinity(struct irq_data *data,
 	 * Atomically updates the IRTE with the new destination, vector
 	 * and flushes the interrupt entry cache.
 	 */
-	ir_data->irte_entry.fields.vector = cfg->vector;
-	ir_data->irte_entry.fields.destination = cfg->dest_apicid;
-	modify_irte(irte_info->devid, irte_info->index, ir_data->irte_entry);
+	iommu->irte_ops->set_affinity(ir_data->entry, irte_info->devid,
+			    irte_info->index, cfg->vector, cfg->dest_apicid);
 
 	/*
 	 * After this point, all the interrupts will start arriving
@@ -4013,6 +4343,7 @@ static void ir_compose_msi_msg(struct irq_data *irq_data, struct msi_msg *msg)
 static struct irq_chip amd_ir_chip = {
 	.irq_ack = ir_ack_apic_edge,
 	.irq_set_affinity = amd_ir_set_affinity,
+	.irq_set_vcpu_affinity = amd_ir_set_vcpu_affinity,
 	.irq_compose_msi_msg = ir_compose_msi_msg,
 };
 
@@ -4027,4 +4358,43 @@ int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
 
 	return 0;
 }
+
+int amd_iommu_update_ga(int cpu, bool is_run, void *data)
+{
+	unsigned long flags;
+	struct amd_iommu *iommu;
+	struct irq_remap_table *irt;
+	struct amd_ir_data *ir_data = (struct amd_ir_data *)data;
+	int devid = ir_data->irq_2_irte.devid;
+	struct irte_ga *entry = (struct irte_ga *) ir_data->entry;
+	struct irte_ga *ref = (struct irte_ga *) ir_data->ref;
+
+	if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) ||
+	    !ref || !entry || !entry->lo.fields_vapic.guest_mode)
+		return 0;
+
+	iommu = amd_iommu_rlookup_table[devid];
+	if (!iommu)
+		return -ENODEV;
+
+	irt = get_irq_table(devid, false);
+	if (!irt)
+		return -ENODEV;
+
+	spin_lock_irqsave(&irt->lock, flags);
+
+	if (ref->lo.fields_vapic.guest_mode) {
+		if (cpu >= 0)
+			ref->lo.fields_vapic.destination = cpu;
+		ref->lo.fields_vapic.is_run = is_run;
+		barrier();
+	}
+
+	spin_unlock_irqrestore(&irt->lock, flags);
+
+	iommu_flush_irt(iommu, devid);
+	iommu_completion_wait(iommu);
+	return 0;
+}
+EXPORT_SYMBOL(amd_iommu_update_ga);
 #endif
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 59741ead7e15..cd1713631a4a 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -84,6 +84,7 @@
 #define ACPI_DEVFLAG_LINT1              0x80
 #define ACPI_DEVFLAG_ATSDIS             0x10000000
 
+#define LOOP_TIMEOUT	100000
 /*
  * ACPI table definitions
  *
@@ -145,6 +146,8 @@ struct ivmd_header {
 bool amd_iommu_dump;
 bool amd_iommu_irq_remap __read_mostly;
 
+int amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_VAPIC;
+
 static bool amd_iommu_detected;
 static bool __initdata amd_iommu_disabled;
 static int amd_iommu_target_ivhd_type;
@@ -386,6 +389,10 @@ static void iommu_disable(struct amd_iommu *iommu)
 	iommu_feature_disable(iommu, CONTROL_EVT_INT_EN);
 	iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN);
 
+	/* Disable IOMMU GA_LOG */
+	iommu_feature_disable(iommu, CONTROL_GALOG_EN);
+	iommu_feature_disable(iommu, CONTROL_GAINT_EN);
+
 	/* Disable IOMMU hardware itself */
 	iommu_feature_disable(iommu, CONTROL_IOMMU_EN);
 }
@@ -671,6 +678,99 @@ static void __init free_ppr_log(struct amd_iommu *iommu)
 	free_pages((unsigned long)iommu->ppr_log, get_order(PPR_LOG_SIZE));
 }
 
+static void free_ga_log(struct amd_iommu *iommu)
+{
+#ifdef CONFIG_IRQ_REMAP
+	if (iommu->ga_log)
+		free_pages((unsigned long)iommu->ga_log,
+			    get_order(GA_LOG_SIZE));
+	if (iommu->ga_log_tail)
+		free_pages((unsigned long)iommu->ga_log_tail,
+			    get_order(8));
+#endif
+}
+
+static int iommu_ga_log_enable(struct amd_iommu *iommu)
+{
+#ifdef CONFIG_IRQ_REMAP
+	u32 status, i;
+
+	if (!iommu->ga_log)
+		return -EINVAL;
+
+	status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
+
+	/* Check if already running */
+	if (status & (MMIO_STATUS_GALOG_RUN_MASK))
+		return 0;
+
+	iommu_feature_enable(iommu, CONTROL_GAINT_EN);
+	iommu_feature_enable(iommu, CONTROL_GALOG_EN);
+
+	for (i = 0; i < LOOP_TIMEOUT; ++i) {
+		status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
+		if (status & (MMIO_STATUS_GALOG_RUN_MASK))
+			break;
+	}
+
+	if (i >= LOOP_TIMEOUT)
+		return -EINVAL;
+#endif /* CONFIG_IRQ_REMAP */
+	return 0;
+}
+
+#ifdef CONFIG_IRQ_REMAP
+static int iommu_init_ga_log(struct amd_iommu *iommu)
+{
+	u64 entry;
+
+	if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
+		return 0;
+
+	iommu->ga_log = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+					get_order(GA_LOG_SIZE));
+	if (!iommu->ga_log)
+		goto err_out;
+
+	iommu->ga_log_tail = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+					get_order(8));
+	if (!iommu->ga_log_tail)
+		goto err_out;
+
+	entry = (u64)virt_to_phys(iommu->ga_log) | GA_LOG_SIZE_512;
+	memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_BASE_OFFSET,
+		    &entry, sizeof(entry));
+	entry = ((u64)virt_to_phys(iommu->ga_log) & 0xFFFFFFFFFFFFFULL) & ~7ULL;
+	memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_TAIL_OFFSET,
+		    &entry, sizeof(entry));
+	writel(0x00, iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
+	writel(0x00, iommu->mmio_base + MMIO_GA_TAIL_OFFSET);
+
+	return 0;
+err_out:
+	free_ga_log(iommu);
+	return -EINVAL;
+}
+#endif /* CONFIG_IRQ_REMAP */
+
+static int iommu_init_ga(struct amd_iommu *iommu)
+{
+	int ret = 0;
+
+#ifdef CONFIG_IRQ_REMAP
+	/* Note: We have already checked GASup from IVRS table.
+	 *       Now, we need to make sure that GAMSup is set.
+	 */
+	if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) &&
+	    !iommu_feature(iommu, FEATURE_GAM_VAPIC))
+		amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY_GA;
+
+	ret = iommu_init_ga_log(iommu);
+#endif /* CONFIG_IRQ_REMAP */
+
+	return ret;
+}
+
 static void iommu_enable_gt(struct amd_iommu *iommu)
 {
 	if (!iommu_feature(iommu, FEATURE_GT))
@@ -1144,6 +1244,7 @@ static void __init free_iommu_one(struct amd_iommu *iommu)
 	free_command_buffer(iommu);
 	free_event_buffer(iommu);
 	free_ppr_log(iommu);
+	free_ga_log(iommu);
 	iommu_unmap_mmio_space(iommu);
 }
 
@@ -1258,6 +1359,8 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
 			iommu->mmio_phys_end = MMIO_REG_END_OFFSET;
 		else
 			iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
+		if (((h->efr_attr & (0x1 << IOMMU_FEAT_GASUP_SHIFT)) == 0))
+			amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
 		break;
 	case 0x11:
 	case 0x40:
@@ -1265,6 +1368,8 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
 			iommu->mmio_phys_end = MMIO_REG_END_OFFSET;
 		else
 			iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
+		if (((h->efr_reg & (0x1 << IOMMU_EFR_GASUP_SHIFT)) == 0))
+			amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
 		break;
 	default:
 		return -EINVAL;
@@ -1432,6 +1537,7 @@ static int iommu_init_pci(struct amd_iommu *iommu)
 {
 	int cap_ptr = iommu->cap_ptr;
 	u32 range, misc, low, high;
+	int ret;
 
 	iommu->dev = pci_get_bus_and_slot(PCI_BUS_NUM(iommu->devid),
 					  iommu->devid & 0xff);
@@ -1488,6 +1594,10 @@ static int iommu_init_pci(struct amd_iommu *iommu)
 	if (iommu_feature(iommu, FEATURE_PPR) && alloc_ppr_log(iommu))
 		return -ENOMEM;
 
+	ret = iommu_init_ga(iommu);
+	if (ret)
+		return ret;
+
 	if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE))
 		amd_iommu_np_cache = true;
 
@@ -1545,16 +1655,24 @@ static void print_iommu_info(void)
 			dev_name(&iommu->dev->dev), iommu->cap_ptr);
 
 		if (iommu->cap & (1 << IOMMU_CAP_EFR)) {
-			pr_info("AMD-Vi:  Extended features: ");
+			pr_info("AMD-Vi: Extended features (%#llx):\n",
+				iommu->features);
 			for (i = 0; i < ARRAY_SIZE(feat_str); ++i) {
 				if (iommu_feature(iommu, (1ULL << i)))
 					pr_cont(" %s", feat_str[i]);
 			}
+
+			if (iommu->features & FEATURE_GAM_VAPIC)
+				pr_cont(" GA_vAPIC");
+
 			pr_cont("\n");
 		}
 	}
-	if (irq_remapping_enabled)
+	if (irq_remapping_enabled) {
 		pr_info("AMD-Vi: Interrupt remapping enabled\n");
+		if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
+			pr_info("AMD-Vi: virtual APIC enabled\n");
+	}
 }
 
 static int __init amd_iommu_init_pci(void)
@@ -1645,6 +1763,8 @@ enable_faults:
 	if (iommu->ppr_log != NULL)
 		iommu_feature_enable(iommu, CONTROL_PPFINT_EN);
 
+	iommu_ga_log_enable(iommu);
+
 	return 0;
 }
 
@@ -1862,6 +1982,24 @@ static void iommu_apply_resume_quirks(struct amd_iommu *iommu)
 			       iommu->stored_addr_lo | 1);
 }
 
+static void iommu_enable_ga(struct amd_iommu *iommu)
+{
+#ifdef CONFIG_IRQ_REMAP
+	switch (amd_iommu_guest_ir) {
+	case AMD_IOMMU_GUEST_IR_VAPIC:
+		iommu_feature_enable(iommu, CONTROL_GAM_EN);
+		/* Fall through */
+	case AMD_IOMMU_GUEST_IR_LEGACY_GA:
+		iommu_feature_enable(iommu, CONTROL_GA_EN);
+		iommu->irte_ops = &irte_128_ops;
+		break;
+	default:
+		iommu->irte_ops = &irte_32_ops;
+		break;
+	}
+#endif
+}
+
 /*
  * This function finally enables all IOMMUs found in the system after
  * they have been initialized
@@ -1877,9 +2015,15 @@ static void early_enable_iommus(void)
 		iommu_enable_command_buffer(iommu);
 		iommu_enable_event_buffer(iommu);
 		iommu_set_exclusion_range(iommu);
+		iommu_enable_ga(iommu);
 		iommu_enable(iommu);
 		iommu_flush_all_caches(iommu);
 	}
+
+#ifdef CONFIG_IRQ_REMAP
+	if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
+		amd_iommu_irq_ops.capability |= (1 << IRQ_POSTING_CAP);
+#endif
 }
 
 static void enable_iommus_v2(void)
@@ -1905,6 +2049,11 @@ static void disable_iommus(void)
 
 	for_each_iommu(iommu)
 		iommu_disable(iommu);
+
+#ifdef CONFIG_IRQ_REMAP
+	if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
+		amd_iommu_irq_ops.capability &= ~(1 << IRQ_POSTING_CAP);
+#endif
 }
 
 /*
@@ -2059,7 +2208,7 @@ static int __init early_amd_iommu_init(void)
 	struct acpi_table_header *ivrs_base;
 	acpi_size ivrs_size;
 	acpi_status status;
-	int i, ret = 0;
+	int i, remap_cache_sz, ret = 0;
 
 	if (!amd_iommu_detected)
 		return -ENODEV;
@@ -2157,10 +2306,14 @@ static int __init early_amd_iommu_init(void)
 		 * remapping tables.
 		 */
 		ret = -ENOMEM;
+		if (!AMD_IOMMU_GUEST_IR_GA(amd_iommu_guest_ir))
+			remap_cache_sz = MAX_IRQS_PER_TABLE * sizeof(u32);
+		else
+			remap_cache_sz = MAX_IRQS_PER_TABLE * (sizeof(u64) * 2);
 		amd_iommu_irq_cache = kmem_cache_create("irq_remap_cache",
-				MAX_IRQS_PER_TABLE * sizeof(u32),
-				IRQ_TABLE_ALIGNMENT,
-				0, NULL);
+							remap_cache_sz,
+							IRQ_TABLE_ALIGNMENT,
+							0, NULL);
 		if (!amd_iommu_irq_cache)
 			goto out;
 
@@ -2413,6 +2566,21 @@ static int __init parse_amd_iommu_dump(char *str)
 	return 1;
 }
 
+static int __init parse_amd_iommu_intr(char *str)
+{
+	for (; *str; ++str) {
+		if (strncmp(str, "legacy", 6) == 0) {
+			amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
+			break;
+		}
+		if (strncmp(str, "vapic", 5) == 0) {
+			amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_VAPIC;
+			break;
+		}
+	}
+	return 1;
+}
+
 static int __init parse_amd_iommu_options(char *str)
 {
 	for (; *str; ++str) {
@@ -2521,6 +2689,7 @@ static int __init parse_ivrs_acpihid(char *str)
 
 __setup("amd_iommu_dump",	parse_amd_iommu_dump);
 __setup("amd_iommu=",		parse_amd_iommu_options);
+__setup("amd_iommu_intr=",	parse_amd_iommu_intr);
 __setup("ivrs_ioapic",		parse_ivrs_ioapic);
 __setup("ivrs_hpet",		parse_ivrs_hpet);
 __setup("ivrs_acpihid",		parse_ivrs_acpihid);
diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h
index a1f3346736e5..7eb60c15c582 100644
--- a/drivers/iommu/amd_iommu_proto.h
+++ b/drivers/iommu/amd_iommu_proto.h
@@ -38,6 +38,7 @@ extern int amd_iommu_enable(void);
 extern void amd_iommu_disable(void);
 extern int amd_iommu_reenable(int);
 extern int amd_iommu_enable_faulting(void);
+extern int amd_iommu_guest_ir;
 
 /* IOMMUv2 specific functions */
 struct iommu_domain;
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index caf5e3822715..fa766eefd590 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -22,6 +22,7 @@
 
 #include <linux/types.h>
 #include <linux/mutex.h>
+#include <linux/msi.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/pci.h>
@@ -69,6 +70,8 @@
 #define MMIO_EXCL_LIMIT_OFFSET  0x0028
 #define MMIO_EXT_FEATURES	0x0030
 #define MMIO_PPR_LOG_OFFSET	0x0038
+#define MMIO_GA_LOG_BASE_OFFSET	0x00e0
+#define MMIO_GA_LOG_TAIL_OFFSET	0x00e8
 #define MMIO_CMD_HEAD_OFFSET	0x2000
 #define MMIO_CMD_TAIL_OFFSET	0x2008
 #define MMIO_EVT_HEAD_OFFSET	0x2010
@@ -76,6 +79,8 @@
 #define MMIO_STATUS_OFFSET	0x2020
 #define MMIO_PPR_HEAD_OFFSET	0x2030
 #define MMIO_PPR_TAIL_OFFSET	0x2038
+#define MMIO_GA_HEAD_OFFSET	0x2040
+#define MMIO_GA_TAIL_OFFSET	0x2048
 #define MMIO_CNTR_CONF_OFFSET	0x4000
 #define MMIO_CNTR_REG_OFFSET	0x40000
 #define MMIO_REG_END_OFFSET	0x80000
@@ -92,6 +97,7 @@
 #define FEATURE_GA		(1ULL<<7)
 #define FEATURE_HE		(1ULL<<8)
 #define FEATURE_PC		(1ULL<<9)
+#define FEATURE_GAM_VAPIC	(1ULL<<21)
 
 #define FEATURE_PASID_SHIFT	32
 #define FEATURE_PASID_MASK	(0x1fULL << FEATURE_PASID_SHIFT)
@@ -110,6 +116,9 @@
 #define MMIO_STATUS_EVT_INT_MASK	(1 << 1)
 #define MMIO_STATUS_COM_WAIT_INT_MASK	(1 << 2)
 #define MMIO_STATUS_PPR_INT_MASK	(1 << 6)
+#define MMIO_STATUS_GALOG_RUN_MASK	(1 << 8)
+#define MMIO_STATUS_GALOG_OVERFLOW_MASK	(1 << 9)
+#define MMIO_STATUS_GALOG_INT_MASK	(1 << 10)
 
 /* event logging constants */
 #define EVENT_ENTRY_SIZE	0x10
@@ -146,6 +155,10 @@
 #define CONTROL_PPFINT_EN       0x0eULL
 #define CONTROL_PPR_EN          0x0fULL
 #define CONTROL_GT_EN           0x10ULL
+#define CONTROL_GA_EN           0x11ULL
+#define CONTROL_GAM_EN          0x19ULL
+#define CONTROL_GALOG_EN        0x1CULL
+#define CONTROL_GAINT_EN        0x1DULL
 
 #define CTRL_INV_TO_MASK	(7 << CONTROL_INV_TIMEOUT)
 #define CTRL_INV_TO_NONE	0
@@ -224,6 +237,19 @@
 
 #define PPR_REQ_FAULT		0x01
 
+/* Constants for GA Log handling */
+#define GA_LOG_ENTRIES		512
+#define GA_LOG_SIZE_SHIFT	56
+#define GA_LOG_SIZE_512		(0x8ULL << GA_LOG_SIZE_SHIFT)
+#define GA_ENTRY_SIZE		8
+#define GA_LOG_SIZE		(GA_ENTRY_SIZE * GA_LOG_ENTRIES)
+
+#define GA_TAG(x)		(u32)(x & 0xffffffffULL)
+#define GA_DEVID(x)		(u16)(((x) >> 32) & 0xffffULL)
+#define GA_REQ_TYPE(x)		(((x) >> 60) & 0xfULL)
+
+#define GA_GUEST_NR		0x1
+
 #define PAGE_MODE_NONE    0x00
 #define PAGE_MODE_1_LEVEL 0x01
 #define PAGE_MODE_2_LEVEL 0x02
@@ -329,6 +355,12 @@
 #define IOMMU_CAP_NPCACHE 26
 #define IOMMU_CAP_EFR     27
 
+/* IOMMU Feature Reporting Field (for IVHD type 10h */
+#define IOMMU_FEAT_GASUP_SHIFT	6
+
+/* IOMMU Extended Feature Register (EFR) */
+#define IOMMU_EFR_GASUP_SHIFT	7
+
 #define MAX_DOMAIN_ID 65536
 
 /* Protection domain flags */
@@ -400,6 +432,7 @@ struct amd_iommu_fault {
 
 struct iommu_domain;
 struct irq_domain;
+struct amd_irte_ops;
 
 /*
  * This structure contains generic data for  IOMMU protection domains
@@ -490,6 +523,12 @@ struct amd_iommu {
 	/* Base of the PPR log, if present */
 	u8 *ppr_log;
 
+	/* Base of the GA log, if present */
+	u8 *ga_log;
+
+	/* Tail of the GA log, if present */
+	u8 *ga_log_tail;
+
 	/* true if interrupts for this IOMMU are already enabled */
 	bool int_enabled;
 
@@ -523,6 +562,8 @@ struct amd_iommu {
 #ifdef CONFIG_IRQ_REMAP
 	struct irq_domain *ir_domain;
 	struct irq_domain *msi_domain;
+
+	struct amd_irte_ops *irte_ops;
 #endif
 };
 
@@ -681,4 +722,112 @@ static inline int get_hpet_devid(int id)
 	return -EINVAL;
 }
 
+enum amd_iommu_intr_mode_type {
+	AMD_IOMMU_GUEST_IR_LEGACY,
+
+	/* This mode is not visible to users. It is used when
+	 * we cannot fully enable vAPIC and fallback to only support
+	 * legacy interrupt remapping via 128-bit IRTE.
+	 */
+	AMD_IOMMU_GUEST_IR_LEGACY_GA,
+	AMD_IOMMU_GUEST_IR_VAPIC,
+};
+
+#define AMD_IOMMU_GUEST_IR_GA(x)	(x == AMD_IOMMU_GUEST_IR_VAPIC || \
+					 x == AMD_IOMMU_GUEST_IR_LEGACY_GA)
+
+#define AMD_IOMMU_GUEST_IR_VAPIC(x)	(x == AMD_IOMMU_GUEST_IR_VAPIC)
+
+union irte {
+	u32 val;
+	struct {
+		u32 valid	: 1,
+		    no_fault	: 1,
+		    int_type	: 3,
+		    rq_eoi	: 1,
+		    dm		: 1,
+		    rsvd_1	: 1,
+		    destination	: 8,
+		    vector	: 8,
+		    rsvd_2	: 8;
+	} fields;
+};
+
+union irte_ga_lo {
+	u64 val;
+
+	/* For int remapping */
+	struct {
+		u64 valid	: 1,
+		    no_fault	: 1,
+		    /* ------ */
+		    int_type	: 3,
+		    rq_eoi	: 1,
+		    dm		: 1,
+		    /* ------ */
+		    guest_mode	: 1,
+		    destination	: 8,
+		    rsvd	: 48;
+	} fields_remap;
+
+	/* For guest vAPIC */
+	struct {
+		u64 valid	: 1,
+		    no_fault	: 1,
+		    /* ------ */
+		    ga_log_intr	: 1,
+		    rsvd1	: 3,
+		    is_run	: 1,
+		    /* ------ */
+		    guest_mode	: 1,
+		    destination	: 8,
+		    rsvd2	: 16,
+		    ga_tag	: 32;
+	} fields_vapic;
+};
+
+union irte_ga_hi {
+	u64 val;
+	struct {
+		u64 vector	: 8,
+		    rsvd_1	: 4,
+		    ga_root_ptr	: 40,
+		    rsvd_2	: 12;
+	} fields;
+};
+
+struct irte_ga {
+	union irte_ga_lo lo;
+	union irte_ga_hi hi;
+};
+
+struct irq_2_irte {
+	u16 devid; /* Device ID for IRTE table */
+	u16 index; /* Index into IRTE table*/
+};
+
+struct amd_ir_data {
+	u32 cached_ga_tag;
+	struct irq_2_irte irq_2_irte;
+	struct msi_msg msi_entry;
+	void *entry;    /* Pointer to union irte or struct irte_ga */
+	void *ref;      /* Pointer to the actual irte */
+};
+
+struct amd_irte_ops {
+	void (*prepare)(void *, u32, u32, u8, u32, int);
+	void (*activate)(void *, u16, u16);
+	void (*deactivate)(void *, u16, u16);
+	void (*set_affinity)(void *, u16, u16, u8, u32);
+	void *(*get)(struct irq_remap_table *, int);
+	void (*set_allocated)(struct irq_remap_table *, int);
+	bool (*is_allocated)(struct irq_remap_table *, int);
+	void (*clear_allocated)(struct irq_remap_table *, int);
+};
+
+#ifdef CONFIG_IRQ_REMAP
+extern struct amd_irte_ops irte_32_ops;
+extern struct amd_irte_ops irte_128_ops;
+#endif
+
 #endif /* _ASM_X86_AMD_IOMMU_TYPES_H */
diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h
index 2b08e79f5100..09751d349963 100644
--- a/include/linux/amd-iommu.h
+++ b/include/linux/amd-iommu.h
@@ -22,6 +22,20 @@
 
 #include <linux/types.h>
 
+/*
+ * This is mainly used to communicate information back-and-forth
+ * between SVM and IOMMU for setting up and tearing down posted
+ * interrupt
+ */
+struct amd_iommu_pi_data {
+	u32 ga_tag;
+	u32 prev_ga_tag;
+	u64 base;
+	bool is_guest_mode;
+	struct vcpu_data *vcpu_data;
+	void *ir_data;
+};
+
 #ifdef CONFIG_AMD_IOMMU
 
 struct task_struct;
@@ -168,11 +182,34 @@ typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid);
 
 extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
 					   amd_iommu_invalidate_ctx cb);
-
-#else
+#else /* CONFIG_AMD_IOMMU */
 
 static inline int amd_iommu_detect(void) { return -ENODEV; }
 
-#endif
+#endif /* CONFIG_AMD_IOMMU */
+
+#if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP)
+
+/* IOMMU AVIC Function */
+extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));
+
+extern int
+amd_iommu_update_ga(int cpu, bool is_run, void *data);
+
+#else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
+
+static inline int
+amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
+{
+	return 0;
+}
+
+static inline int
+amd_iommu_update_ga(int cpu, bool is_run, void *data)
+{
+	return 0;
+}
+
+#endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
 
 #endif /* _ASM_X86_AMD_IOMMU_H */