linux-kernel - [PATCH 04/13] iommu: amd: Convert to using amd_io

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Date:   Wed, 23 Sep 2020 10:14:33 +0000
From:   Suravee Suthikulpanit <suravee.suthikulpanit@....com>
To:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc:     joro@...tes.org,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Subject: [PATCH 04/13] iommu: amd: Convert to using amd_io_pgtable

Make use of the new struct amd_io_pgtable in preparation to remove
the struct domain_pgtable.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
---
 drivers/iommu/amd/amd_iommu.h |  1 +
 drivers/iommu/amd/iommu.c     | 25 ++++++++++---------------
 2 files changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h
index da6e09657e00..22ecacb71675 100644
--- a/drivers/iommu/amd/amd_iommu.h
+++ b/drivers/iommu/amd/amd_iommu.h
@@ -47,6 +47,7 @@ extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
 extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
 extern int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
 				u64 address);
+extern void amd_iommu_update_and_flush_device_table(struct protection_domain *domain);
 extern int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid);
 extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
 				     unsigned long cr3);
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index c8b8619cc744..09da37c4c9c4 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -90,8 +90,6 @@ struct kmem_cache *amd_iommu_irq_cache;
 
 static void update_domain(struct protection_domain *domain);
 static void detach_device(struct device *dev);
-static void update_and_flush_device_table(struct protection_domain *domain,
-					  struct domain_pgtable *pgtable);
 
 /****************************************************************************
  *
@@ -1482,7 +1480,7 @@ static bool increase_address_space(struct protection_domain *domain,
 
 	pgtable.root  = pte;
 	pgtable.mode += 1;
-	update_and_flush_device_table(domain, &pgtable);
+	amd_iommu_update_and_flush_device_table(domain);
 	domain_flush_complete(domain);
 
 	/*
@@ -1857,17 +1855,16 @@ static void free_gcr3_table(struct protection_domain *domain)
 }
 
 static void set_dte_entry(u16 devid, struct protection_domain *domain,
-			  struct domain_pgtable *pgtable,
 			  bool ats, bool ppr)
 {
 	u64 pte_root = 0;
 	u64 flags = 0;
 	u32 old_domid;
 
-	if (pgtable->mode != PAGE_MODE_NONE)
-		pte_root = iommu_virt_to_phys(pgtable->root);
+	if (domain->iop.mode != PAGE_MODE_NONE)
+		pte_root = iommu_virt_to_phys(domain->iop.root);
 
-	pte_root |= (pgtable->mode & DEV_ENTRY_MODE_MASK)
+	pte_root |= (domain->iop.mode & DEV_ENTRY_MODE_MASK)
 		    << DEV_ENTRY_MODE_SHIFT;
 	pte_root |= DTE_FLAG_IR | DTE_FLAG_IW | DTE_FLAG_V | DTE_FLAG_TV;
 
@@ -1957,7 +1954,7 @@ static void do_attach(struct iommu_dev_data *dev_data,
 
 	/* Update device table */
 	amd_iommu_domain_get_pgtable(domain, &pgtable);
-	set_dte_entry(dev_data->devid, domain, &pgtable,
+	set_dte_entry(dev_data->devid, domain,
 		      ats, dev_data->iommu_v2);
 	clone_aliases(dev_data->pdev);
 
@@ -2263,22 +2260,20 @@ static int amd_iommu_domain_get_attr(struct iommu_domain *domain,
  *
  *****************************************************************************/
 
-static void update_device_table(struct protection_domain *domain,
-				struct domain_pgtable *pgtable)
+static void update_device_table(struct protection_domain *domain)
 {
 	struct iommu_dev_data *dev_data;
 
 	list_for_each_entry(dev_data, &domain->dev_list, list) {
-		set_dte_entry(dev_data->devid, domain, pgtable,
+		set_dte_entry(dev_data->devid, domain,
 			      dev_data->ats.enabled, dev_data->iommu_v2);
 		clone_aliases(dev_data->pdev);
 	}
 }
 
-static void update_and_flush_device_table(struct protection_domain *domain,
-					  struct domain_pgtable *pgtable)
+void amd_iommu_update_and_flush_device_table(struct protection_domain *domain)
 {
-	update_device_table(domain, pgtable);
+	update_device_table(domain);
 	domain_flush_devices(domain);
 }
 
@@ -2288,7 +2283,7 @@ static void update_domain(struct protection_domain *domain)
 
 	/* Update device table */
 	amd_iommu_domain_get_pgtable(domain, &pgtable);
-	update_and_flush_device_table(domain, &pgtable);
+	amd_iommu_update_and_flush_device_table(domain);
 
 	/* Flush domain TLB(s) and wait for completion */
 	domain_flush_tlb_pde(domain);
-- 
2.17.1