From: FelixCuioc <FelixCui-oc@zhaoxin.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>,
Eduardo Habkost <ehabkost@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>
Cc: TonyWWang-oc@zhaoxin.com, qemu-devel@nongnu.org, CobeChen-oc@zhaoxin.com
Subject: [PATCH 0/1] Remove flatview_simplify()
Date: Sun, 6 Dec 2020 16:21:41 +0800 [thread overview]
Message-ID: <20201206082142.7519-1-FelixCui-oc@zhaoxin.com> (raw)
When assign EHCI device to the virtual machine,
after initializing EHCI in seabios,it will continuously
send dma cycles.
Flatview_simplify() will merge a very large range.The IOVA
mappings of the EHCI device will be innocently unmapped
between the delete and add phases of the VFIO MemoryListener.
At this time,the IOMMU will block the DMA cycle.
We want to remove flatview_simplify() is to prevent EHCI
device IOVA mappings from being unmapped.
FelixCui-oc (1):
Remove flatview_simplify()
softmmu/memory.c | 1 -
1 file changed, 1 deletion(-)
--
2.17.1
next reply other threads:[~2020-12-06 8:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-06 8:21 FelixCuioc [this message]
2020-12-06 8:21 ` [PATCH 1/1] Remove flatview_simplify() FelixCuioc
2020-12-06 10:10 ` Paolo Bonzini
-- strict thread matches above, loose matches on Subject: below --
2021-03-29 12:14 [PATCH 0/1] " FelixCuioc
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