From f80f1c6274f537f89d9e809541b10a96c435a8a9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 7 Aug 2024 15:13:35 +0200
Subject: Merging upstream version 6.9.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/iommu/amd/amd_iommu.h                   |  1 +
 drivers/iommu/amd/init.c                        |  1 +
 drivers/iommu/amd/iommu.c                       | 34 ++++++++++++++++---------
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c |  3 +++
 4 files changed, 27 insertions(+), 12 deletions(-)

(limited to 'drivers/iommu')

diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h
index f482aab420..95a161fdba 100644
--- a/drivers/iommu/amd/amd_iommu.h
+++ b/drivers/iommu/amd/amd_iommu.h
@@ -56,6 +56,7 @@ int amd_iommu_clear_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid);
 void amd_iommu_flush_all_caches(struct amd_iommu *iommu);
 void amd_iommu_update_and_flush_device_table(struct protection_domain *domain);
 void amd_iommu_domain_update(struct protection_domain *domain);
+void amd_iommu_dev_update_dte(struct iommu_dev_data *dev_data, bool set);
 void amd_iommu_domain_flush_complete(struct protection_domain *domain);
 void amd_iommu_domain_flush_pages(struct protection_domain *domain,
 				  u64 address, size_t size);
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index e740dc54c4..21798a0fa9 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -2784,6 +2784,7 @@ static void early_enable_iommu(struct amd_iommu *iommu)
 	iommu_enable_command_buffer(iommu);
 	iommu_enable_event_buffer(iommu);
 	iommu_set_exclusion_range(iommu);
+	iommu_enable_gt(iommu);
 	iommu_enable_ga(iommu);
 	iommu_enable_xt(iommu);
 	iommu_enable_irtcachedis(iommu);
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index fb727f5b0b..e2b900ffbc 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2002,6 +2002,21 @@ static void clear_dte_entry(struct amd_iommu *iommu, u16 devid)
 	amd_iommu_apply_erratum_63(iommu, devid);
 }
 
+/* Update and flush DTE for the given device */
+void amd_iommu_dev_update_dte(struct iommu_dev_data *dev_data, bool set)
+{
+	struct amd_iommu *iommu = get_amd_iommu_from_dev(dev_data->dev);
+
+	if (set)
+		set_dte_entry(iommu, dev_data);
+	else
+		clear_dte_entry(iommu, dev_data->devid);
+
+	clone_aliases(iommu, dev_data->dev);
+	device_flush_dte(dev_data);
+	iommu_completion_wait(iommu);
+}
+
 static int do_attach(struct iommu_dev_data *dev_data,
 		     struct protection_domain *domain)
 {
@@ -2036,10 +2051,7 @@ static int do_attach(struct iommu_dev_data *dev_data,
 	}
 
 	/* Update device table */
-	set_dte_entry(iommu, dev_data);
-	clone_aliases(iommu, dev_data->dev);
-
-	device_flush_dte(dev_data);
+	amd_iommu_dev_update_dte(dev_data, true);
 
 	return ret;
 }
@@ -2049,6 +2061,12 @@ static void do_detach(struct iommu_dev_data *dev_data)
 	struct protection_domain *domain = dev_data->domain;
 	struct amd_iommu *iommu = get_amd_iommu_from_dev_data(dev_data);
 
+	/* Clear DTE and flush the entry */
+	amd_iommu_dev_update_dte(dev_data, false);
+
+	/* Flush IOTLB and wait for the flushes to finish */
+	amd_iommu_domain_flush_all(domain);
+
 	/* Clear GCR3 table */
 	if (domain->pd_mode == PD_MODE_V2) {
 		update_gcr3(dev_data, 0, 0, false);
@@ -2058,14 +2076,6 @@ static void do_detach(struct iommu_dev_data *dev_data)
 	/* Update data structures */
 	dev_data->domain = NULL;
 	list_del(&dev_data->list);
-	clear_dte_entry(iommu, dev_data->devid);
-	clone_aliases(iommu, dev_data->dev);
-
-	/* Flush the DTE entry */
-	device_flush_dte(dev_data);
-
-	/* Flush IOTLB and wait for the flushes to finish */
-	amd_iommu_domain_flush_all(domain);
 
 	/* decrease reference counters - needs to happen after the flushes */
 	domain->dev_iommu[iommu->index] -= 1;
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index 2cd433a9c8..41b44baef1 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -569,6 +569,9 @@ static int arm_smmu_sva_set_dev_pasid(struct iommu_domain *domain,
 	int ret = 0;
 	struct mm_struct *mm = domain->mm;
 
+	if (mm_get_enqcmd_pasid(mm) != id)
+		return -EINVAL;
+
 	mutex_lock(&sva_lock);
 	ret = __arm_smmu_sva_bind(dev, id, mm);
 	mutex_unlock(&sva_lock);
-- 
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