[PATCH AUTOSEL 5.4 36/49] iommu/amd: Call domain_flush_complete() in update_domain()

Sasha Levin sashal at kernel.org
Thu May 14 18:52:57 UTC 2020

From: Joerg Roedel <jroedel at suse.de>

[ Upstream commit f44a4d7e4f1cdef73c90b1dc749c4d8a7372a8eb ]

The update_domain() function is expected to also inform the hardware
about domain changes. This needs a COMPLETION_WAIT command to be sent
to all IOMMUs which use the domain.

Signed-off-by: Joerg Roedel <jroedel at suse.de>
Tested-by: Qian Cai <cai at lca.pw>
Link: https://lore.kernel.org/r/20200504125413.16798-4-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Sasha Levin <sashal at kernel.org>
 drivers/iommu/amd_iommu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index bc77714983421..32de8e7bb8b45 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2386,6 +2386,7 @@ static void update_domain(struct protection_domain *domain)
+	domain_flush_complete(domain);
 static int dir2prot(enum dma_data_direction direction)

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