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[Qemu-devel] vIOMMU Posted-interrupt implementation - atomic operation?
From: |
Jintack Lim |
Subject: |
[Qemu-devel] vIOMMU Posted-interrupt implementation - atomic operation? |
Date: |
Thu, 31 May 2018 23:46:58 -0400 |
Hi,
I'm implementing Posted-interrupt functionality in vIOMMU. According
to Vt-d spec 5.2.3, IOMMU performs a coherent atomic read-modify-write
operation of the posted-interrupt descriptor. I wonder how can we
achieve this considering the guest can modify the same
posted-interrupt descriptor anytime. Is there any existing mechanism
that I can use in QEMU?
Thanks,
Jintack
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