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[PATCH v2 0/3] drop writes to read-only ram device & vfio regions
From: |
Yan Zhao |
Subject: |
[PATCH v2 0/3] drop writes to read-only ram device & vfio regions |
Date: |
Fri, 3 Apr 2020 17:08:23 +0000 |
patch 1 modifies handler of ram device memory regions to drop guest writes
to read-only ram device memory regions
patch 2 modifies handler of non-mmap'd read-only vfio regions to drop guest
writes to those regions
patch 3 let mmap'd read-only vfio regions be able to generate vmexit for
guest write. so, without patch 1, host qemu would crash on guest write to
this read-only region. with patch 1, host qemu would drop the writes.
Changelog:
v2:
-split one big patches into smaller ones (Philippe)
-modify existing trace to record guest writes to read-only memory (Alex)
-modify vfio_region_write() to drop guest writes to non-mmap'd read-only
region (Alex)
Yan Zhao (3):
memory: drop guest writes to read-only ram device regions
hw/vfio: drop guest writes to ro regions
hw/vfio: let read-only flag take effect for mmap'd regions
hw/vfio/common.c | 12 +++++++++++-
hw/vfio/trace-events | 2 +-
memory.c | 6 +++++-
trace-events | 2 +-
4 files changed, 18 insertions(+), 4 deletions(-)
--
2.17.1