There are 3 highmem IO regions on arm/virt machine. Their base addresses
are determined dynamically. However, there are several issues I can see
in current implementation:
(1) The memory region's base address and highest_gpa are always updated
no matter even if the memory region has been disabled. It's incorrectly
incurring waste in the PA space.
(2) One particular memory region can be silently disabled due to the PA
limit. We need warn users in this case. The warning messages are
helpful to identify the cause of potential issues in future.
The issue (1) and (2) are fixed by PATCH[1] and PATCH[2] separately.
Gavin Shan (2):
hw/arm/virt: Improve address assignment for highmem IO regions
hw/arm/virt: Warn when high memory region is disabled
hw/arm/virt.c | 72 +++++++++++++++++++++++++++++++++++----------------
1 file changed, 49 insertions(+), 23 deletions(-)
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2.23.0
