struct kvm_cpu *kvm_cpu__init(struct kvm *kvm, unsigned long cpu_id)
{
struct kvm_cpu *vcpu;
int mmap_size;
int coalesced_offset;
vcpu = kvm_cpu__new(kvm);
if (!vcpu)
return NULL;
vcpu->cpu_id = cpu_id;
vcpu->vcpu_fd = ioctl(vcpu->kvm->vm_fd, KVM_CREATE_VCPU, cpu_id);
if (vcpu->vcpu_fd < 0)
die_perror("KVM_CREATE_VCPU ioctl");
mmap_size = ioctl(vcpu->kvm->sys_fd, KVM_GET_VCPU_MMAP_SIZE, 0);
if (mmap_size < 0)
die_perror("KVM_GET_VCPU_MMAP_SIZE ioctl");
vcpu->kvm_run = mmap(NULL, mmap_size, PROT_RW, MAP_SHARED, vcpu->vcpu_fd, 0);
if (vcpu->kvm_run == MAP_FAILED)
die("unable to mmap vcpu fd");
coalesced_offset = ioctl(kvm->sys_fd, KVM_CHECK_EXTENSION, KVM_CAP_COALESCED_MMIO);
if (coalesced_offset)
vcpu->ring = (void *)vcpu->kvm_run + (coalesced_offset * PAGE_SIZE);
vcpu->is_running = true;
return vcpu;
}
struct kvm_cpu *kvm_cpu__init(struct kvm *kvm, unsigned long cpu_id)
{
struct kvm_cpu *vcpu;
int mmap_size;
struct kvm_enable_cap papr_cap = { .cap = KVM_CAP_PPC_PAPR };
vcpu = kvm_cpu__new(kvm);
if (!vcpu)
return NULL;
vcpu->cpu_id = cpu_id;
vcpu->vcpu_fd = ioctl(vcpu->kvm->vm_fd, KVM_CREATE_VCPU, cpu_id);
if (vcpu->vcpu_fd < 0)
die_perror("KVM_CREATE_VCPU ioctl");
mmap_size = ioctl(vcpu->kvm->sys_fd, KVM_GET_VCPU_MMAP_SIZE, 0);
if (mmap_size < 0)
die_perror("KVM_GET_VCPU_MMAP_SIZE ioctl");
vcpu->kvm_run = mmap(NULL, mmap_size, PROT_RW, MAP_SHARED, vcpu->vcpu_fd, 0);
if (vcpu->kvm_run == MAP_FAILED)
die("unable to mmap vcpu fd");
if (ioctl(vcpu->vcpu_fd, KVM_ENABLE_CAP, &papr_cap) < 0)
die("unable to enable PAPR capability");
/*
* We start all CPUs, directing non-primary threads into the kernel's
* secondary start point. When we come to support SLOF, we will start
* only one and SLOF will RTAS call us to ask for others to be
* started. (FIXME: make more generic & interface with whichever
* firmware a platform may be using.)
*/
vcpu->is_running = true;
/* Register with IRQ controller (FIXME, assumes XICS) */
xics_cpu_register(vcpu);
return vcpu;
}
