HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT 351 arch/x86/include/asm/hyperv-tlfs.h (~((1ull << HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT) - 1)) HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT 1019 arch/x86/kvm/hyperv.c gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;