Displaying 2 results from an estimated 2 matches for "weiwang".
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2012 Oct 24
5
[PATCH v3] IOMMU: keep disabled until iommu_setup() is called
The iommu is enabled by default when xen is booting and later disabled
in iommu_setup() when no iommu is present.
But under some circumstances iommu code can be called before
iommu_setup() is processed. If there is no iommu available xen crashes.
This can happen for example when panic(...) is called as introduced
with the patch "x86-64: detect processors subject to AMD erratum #121
and
2012 Nov 05
25
[PATCH] IOMMU: don't disable bus mastering on faults for devices used by Xen or Dom0
Under the assumption that in these cases recurring faults aren''t a
security issue and it can be expected that the drivers there are going
to try to take care of the problem.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -625,6 +625,18 @@ static void parse_event_log_entry(struct