On Fri, 5 Sep 2025, [email protected] wrote: > From: Denis Mukhin <[email protected]> > > Introduce a driver framework to abstract UART emulators in the hypervisor. > > That allows for architecture-independent handling of virtual UARTs in the > console driver and simplifies enabling new UART emulators. > > The framework is built under CONFIG_VUART_FRAMEWORK, which will be > automatically enabled once the user enables any UART emulator. > > Current implementation supports maximum of one vUART of each kind per domain. > > Use new domain_has_vuart() in the console driver code to check whether to > forward console input to the domain using vUART. > > Enable console forwarding over vUART for hardware domains with a vUART. That > enables console forwarding to dom0 on x86, since console can be forwarded only > to Xen, dom0 and pvshim on x86 as of now. > > Note: existing vUARTs are deliberately *not* hooked to the new framework to > minimize the scope of the patch: vpl011 (i.e. SBSA) emulator and "vuart" (i.e. > minimalistic MMIO-mapped dtuart for hwdoms on Arm) are kept unmodified. > > No functional changes for non-x86 architectures. > > Signed-off-by: Denis Mukhin <[email protected]>
Reviewed-by: Stefano Stabellini <[email protected]>
