From: Tom Murphy <tmurphy@arista.com>
To: iommu@lists.linux-foundation.org
Cc: murphyt7@tcd.ie, Tom Murphy <tmurphy@arista.com>,
Joerg Roedel <joro@8bytes.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v1] iommu/amd: flush not present cache in iommu_map_page
Date: Wed, 24 Apr 2019 17:50:51 +0100 [thread overview]
Message-ID: <20190424165051.13614-1-tmurphy@arista.com> (raw)
check if there is a not-present cache present and flush it if there is.
Signed-off-by: Tom Murphy <tmurphy@arista.com>
---
drivers/iommu/amd_iommu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index f7cdd2ab7f11..91fe5cb10f50 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1637,6 +1637,11 @@ static int iommu_map_page(struct protection_domain *dom,
update_domain(dom);
+ if (unlikely(amd_iommu_np_cache && !dom->updated)) {
+ domain_flush_pages(dom, bus_addr, page_size);
+ domain_flush_complete(dom);
+ }
+
/* Everything flushed out, free pages now */
free_page_list(freelist);
--
2.17.1
next reply other threads:[~2019-04-24 16:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-24 16:50 Tom Murphy [this message]
2019-04-26 14:04 ` Joerg Roedel
2019-04-27 14:20 ` Tom Murphy
2019-04-29 11:59 ` Christoph Hellwig
2019-04-29 12:17 ` Tom Murphy
2019-04-29 12:29 ` Christoph Hellwig
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