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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
	iommu@lists.linux-foundation.org, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH AUTOSEL 5.6 42/62] iommu/amd: Call domain_flush_complete() in update_domain()
Date: Thu, 14 May 2020 14:51:27 -0400	[thread overview]
Message-ID: <20200514185147.19716-42-sashal@kernel.org> (raw)
In-Reply-To: <20200514185147.19716-1-sashal@kernel.org>

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 68da484a69dd0..d2499c86d395c 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2321,6 +2321,7 @@ static void update_domain(struct protection_domain *domain)
 
 	domain_flush_devices(domain);
 	domain_flush_tlb_pde(domain);
+	domain_flush_complete(domain);
 }
 
 int __init amd_iommu_init_api(void)
-- 
2.20.1

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  parent reply	other threads:[~2020-05-14 18:52 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200514185147.19716-1-sashal@kernel.org>
2020-05-14 18:51 ` [PATCH AUTOSEL 5.6 40/62] iommu/amd: Fix race in increase_address_space()/fetch_pte() Sasha Levin
2020-05-14 18:51 ` [PATCH AUTOSEL 5.6 41/62] iommu/amd: Do not loop forever when trying to increase address space Sasha Levin
2020-05-14 18:51 ` Sasha Levin [this message]
2020-05-14 18:51 ` [PATCH AUTOSEL 5.6 43/62] iommu/amd: Update Device Table in increase_address_space() Sasha Levin

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