From: Vasant Hegde <vasant.hegde@amd.com>
Date: Wed, 6 Jul 2022 17:08:18 +0530
Subject: iommu/amd: Flush upto last_bdf only
Git-commit: a3cf6ab35751ea77a2bd47636dca761e835b282d
Patch-mainline: v6.0-rc1
References: bsc#1205701

Fix amd_iommu_flush_dte_all() and amd_iommu_flush_tlb_all() to flush
upto last_bdf only.

Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20220706113825.25582-29-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/iommu.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 94ebffe15960..6914911d4fb6 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1191,8 +1191,9 @@ static int iommu_flush_dte(struct amd_iommu *iommu, u16 devid)
 static void amd_iommu_flush_dte_all(struct amd_iommu *iommu)
 {
 	u32 devid;
+	u16 last_bdf = iommu->pci_seg->last_bdf;
 
-	for (devid = 0; devid <= 0xffff; ++devid)
+	for (devid = 0; devid <= last_bdf; ++devid)
 		iommu_flush_dte(iommu, devid);
 
 	iommu_completion_wait(iommu);
@@ -1205,8 +1206,9 @@ static void amd_iommu_flush_dte_all(struct amd_iommu *iommu)
 static void amd_iommu_flush_tlb_all(struct amd_iommu *iommu)
 {
 	u32 dom_id;
+	u16 last_bdf = iommu->pci_seg->last_bdf;
 
-	for (dom_id = 0; dom_id <= 0xffff; ++dom_id) {
+	for (dom_id = 0; dom_id <= last_bdf; ++dom_id) {
 		struct iommu_cmd cmd;
 		build_inv_iommu_pages(&cmd, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
 				      dom_id, 1);
@@ -1249,8 +1251,9 @@ static void iommu_flush_irt(struct amd_iommu *iommu, u16 devid)
 static void amd_iommu_flush_irt_all(struct amd_iommu *iommu)
 {
 	u32 devid;
+	u16 last_bdf = iommu->pci_seg->last_bdf;
 
-	for (devid = 0; devid <= MAX_DEV_TABLE_ENTRIES; devid++)
+	for (devid = 0; devid <= last_bdf; devid++)
 		iommu_flush_irt(iommu, devid);
 
 	iommu_completion_wait(iommu);