ESID_BITS
#define ESID_BITS_MASK ((1 << ESID_BITS) - 1)
#define MAX_USER_CONTEXT_65BIT_VA ((ASM_CONST(1) << (65 - (SID_SHIFT + ESID_BITS))) - 2)
#define USER_VSID_RANGE (1UL << (ESID_BITS + SID_SHIFT))
protovsid = (context << ESID_BITS) |
<< ESID_BITS) - 1;
vcpu3s->proto_vsid_first = (u64)vcpu3s->context_id[0] << ESID_BITS;