* [PATCH AUTOSEL 5.4 36/49] iommu/amd: Call domain_flush_complete() in update_domain()
[not found] <20200514185311.20294-1-sashal@kernel.org>
@ 2020-05-14 18:52 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2020-05-14 18:52 UTC (permalink / raw)
To: linux-kernel, stable; +Cc: Sasha Levin, iommu, Joerg Roedel
From: Joerg Roedel <jroedel@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@suse.de>
Tested-by: Qian Cai <cai@lca.pw>
Link: https://lore.kernel.org/r/20200504125413.16798-4-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@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_devices(domain);
domain_flush_tlb_pde(domain);
+ domain_flush_complete(domain);
}
static int dir2prot(enum dma_data_direction direction)
--
2.20.1
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2020-05-14 18:52 ` [PATCH AUTOSEL 5.4 36/49] iommu/amd: Call domain_flush_complete() in update_domain() Sasha Levin
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