accel/mshv: Add vCPU signal handling

Implement signal handling for MSHV vCPUs to support asynchronous
interrupts from the main thread.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
Link: https://lore.kernel.org/r/20250916164847.77883-12-magnuskulke@linux.microsoft.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed