struct vcpu *__init alloc_dom0_vcpu0(struct domain *dom0)
{
unsigned int max_vcpus = dom0_max_vcpus();
dom0->node_affinity = dom0_nodes;
dom0->auto_node_affinity = !dom0_nr_pxms;
dom0->vcpu = xzalloc_array(struct vcpu *, max_vcpus);
if ( !dom0->vcpu )
return NULL;
dom0->max_vcpus = max_vcpus;
return dom0_setup_vcpu(dom0, 0,
cpumask_last(&dom0_cpus) /* so it wraps around to first pcpu */);
}
static bool __send_ipi_mask(const struct cpumask *mask, int vector)
{
int cur_cpu, vcpu;
struct hv_send_ipi ipi_arg;
int ret = 1;
trace_hyperv_send_ipi_mask(mask, vector);
if (cpumask_empty(mask))
return true;
if (!hv_hypercall_pg)
return false;
if ((vector < HV_IPI_LOW_VECTOR) || (vector > HV_IPI_HIGH_VECTOR))
return false;
/*
* From the supplied CPU set we need to figure out if we can get away
* with cheaper HVCALL_SEND_IPI hypercall. This is possible when the
* highest VP number in the set is < 64. As VP numbers are usually in
* ascending order and match Linux CPU ids, here is an optimization:
* we check the VP number for the highest bit in the supplied set first
* so we can quickly find out if using HVCALL_SEND_IPI_EX hypercall is
* a must. We will also check all VP numbers when walking the supplied
* CPU set to remain correct in all cases.
*/
if (hv_cpu_number_to_vp_number(cpumask_last(mask)) >= 64)
goto do_ex_hypercall;
ipi_arg.vector = vector;
ipi_arg.cpu_mask = 0;
for_each_cpu(cur_cpu, mask) {
vcpu = hv_cpu_number_to_vp_number(cur_cpu);
if (vcpu == VP_INVAL)
return false;
/*
* This particular version of the IPI hypercall can
* only target upto 64 CPUs.
*/
if (vcpu >= 64)
goto do_ex_hypercall;
__set_bit(vcpu, (unsigned long *)&ipi_arg.cpu_mask);
}
static void hyperv_flush_tlb_others(const struct cpumask *cpus,
const struct flush_tlb_info *info)
{
int cpu, vcpu, gva_n, max_gvas;
struct hv_tlb_flush **flush_pcpu;
struct hv_tlb_flush *flush;
u64 status = U64_MAX;
unsigned long flags;
trace_hyperv_mmu_flush_tlb_others(cpus, info);
if (!hv_hypercall_pg)
goto do_native;
if (cpumask_empty(cpus))
return;
local_irq_save(flags);
flush_pcpu = (struct hv_tlb_flush **)
this_cpu_ptr(hyperv_pcpu_input_arg);
flush = *flush_pcpu;
if (unlikely(!flush)) {
local_irq_restore(flags);
goto do_native;
}
if (info->mm) {
/*
* AddressSpace argument must match the CR3 with PCID bits
* stripped out.
*/
flush->address_space = virt_to_phys(info->mm->pgd);
flush->address_space &= CR3_ADDR_MASK;
flush->flags = 0;
} else {
flush->address_space = 0;
flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES;
}
flush->processor_mask = 0;
if (cpumask_equal(cpus, cpu_present_mask)) {
flush->flags |= HV_FLUSH_ALL_PROCESSORS;
} else {
/*
* From the supplied CPU set we need to figure out if we can get
* away with cheaper HVCALL_FLUSH_VIRTUAL_ADDRESS_{LIST,SPACE}
* hypercalls. This is possible when the highest VP number in
* the set is < 64. As VP numbers are usually in ascending order
* and match Linux CPU ids, here is an optimization: we check
* the VP number for the highest bit in the supplied set first
* so we can quickly find out if using *_EX hypercalls is a
* must. We will also check all VP numbers when walking the
* supplied CPU set to remain correct in all cases.
*/
if (hv_cpu_number_to_vp_number(cpumask_last(cpus)) >= 64)
goto do_ex_hypercall;
for_each_cpu(cpu, cpus) {
vcpu = hv_cpu_number_to_vp_number(cpu);
if (vcpu == VP_INVAL) {
local_irq_restore(flags);
goto do_native;
}
if (vcpu >= 64)
goto do_ex_hypercall;
__set_bit(vcpu, (unsigned long *)
&flush->processor_mask);
}
}
