Muminul Islam 30c0fdaff1 hypervisor: mshv: splice GVA page offset into translated GPA ...

On Intel MSHV the memory-intercept guest_physical_address and the
MSHV_VP_TRANSLATE_GVA ioctl both return a page-aligned GPA, while
guest_virtual_address is byte-exact. Returning the cached/translated
GPA unchanged made byte-sized MMIO land at BAR offset 0: virtio
device_status writes (BAR+0x14) hit device_feature_select, so
VIRTIO_F_VERSION_1 was never acked and virtio_blk/net/rng probes
failed with -EINVAL, leaving the guest unable to mount rootfs.

Splice gva & 0xfff into the returned GPA on both the intercept fast
path and the translate_gva fallback, and relax the cached-GVA match
to page granularity so it still hits for other byte offsets in the
same page.

This issue is reproducible on Intel machine, launching
Cloud-Hypervisor on nested scenario, using the Linux Dom0
image as the guest image to turn on nested hypervisor
into the guest.

Assisted-by: Claude:Opus-4.7
Signed-off-by: Muminul Islam <muislam@microsoft.com>

2026-07-09 03:52:45 +00:00

..

src

hypervisor: mshv: splice GVA page offset into translated GPA

2026-07-09 03:52:45 +00:00

Cargo.toml

build(deps): bump the non-rust-vmm group across 2 directories with 22 updates

2026-04-24 00:47:54 +00:00