On 9/24/20 7:49 PM, Stefano Stabellini wrote: > From: Stefano Stabellini <[email protected]> > > The VCPUOP_register_runstate_memory_area hypercall takes a virtual > address of a buffer as a parameter. The semantics of the hypercall are > such that the virtual address should always be valid. > > When KPTI is enabled and we are running userspace code, the virtual > address is not valid, thus, Linux is violating the semantics of > VCPUOP_register_runstate_memory_area. > > Do not call VCPUOP_register_runstate_memory_area when KPTI is enabled. > > Signed-off-by: Stefano Stabellini <[email protected]> > CC: Bertrand Marquis <[email protected]> > CC: [email protected] > CC: [email protected]
Applied to for-linus-5.10 -boris
