CMGS 0a4be0c1c7 vmm: extend last MMIO64 allocator to cover full range ...

The MMIO64 allocator size is computed with alignment truncation:
  size = (range / alignment) * alignment
This loses up to one alignment unit (4 GiB) at the top of the
address space. When a guest (Windows with virtio-win 0.1.285)
programs a BAR near the top of the physical address space, the
allocation fails because the address falls in the truncated gap.

Give the last PCI segment allocator all remaining space up to
the end of the device area, so no addresses are lost.

The `end` parameter of create_mmio_allocators() is an inclusive
address (the last valid byte). Fix the 32-bit caller and tests
to pass inclusive values, consistent with the 64-bit caller
which already uses the inclusive end_of_device_area().

Signed-off-by: CMGS <ilskdw@gmail.com>

2026-04-13 10:25:18 +00:00

..

src

vmm: extend last MMIO64 allocator to cover full range

2026-04-13 10:25:18 +00:00

build.rs

build: Add "fuzzing" as a valid cfg(..) attribute

2024-05-08 08:10:28 +00:00

Cargo.toml

vmm: Support device passthrough with vfio cdev and iommufd

2026-04-10 22:55:38 +00:00