On Tue, 9 Jul 2024 14:56:59 +0200
Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx> wrote:
> Add a uc_kvm fixture to create and destroy a ucontrol VM.
>
> * uc_sie_assertions asserts basic settings in the SIE as setup by the
> kernel.
> * uc_attr_mem_limit asserts the memory limit is max value and cannot be
> set (not supported).
> * uc_no_dirty_log asserts dirty log is not supported.
>
> Signed-off-by: Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx>
[...]
> +
> +/**
> + * create VM with single vcpu, map kvm_run and SIE control block for easy access
> + */
> +FIXTURE_SETUP(uc_kvm)
> +{
> + struct kvm_s390_vm_cpu_processor info;
> + int rc;
> +
> + require_ucontrol_admin();
> +
> + self->kvm_fd = open_kvm_dev_path_or_exit();
> + self->vm_fd = ioctl(self->kvm_fd, KVM_CREATE_VM, KVM_VM_S390_UCONTROL);
> + ASSERT_GE(self->vm_fd, 0);
> +
> + kvm_device_attr_get(self->vm_fd, KVM_S390_VM_CPU_MODEL,
> + KVM_S390_VM_CPU_PROCESSOR, &info);
> + TH_LOG("create VM 0x%llx", info.cpuid);
> +
> + self->vcpu_fd = ioctl(self->vm_fd, KVM_CREATE_VCPU, 0);
> + ASSERT_GE(self->vcpu_fd, 0);
> +
> + self->kvm_run_size = ioctl(self->kvm_fd, KVM_GET_VCPU_MMAP_SIZE, NULL);
> + ASSERT_GE(self->kvm_run_size, sizeof(struct kvm_run))
> + TH_LOG(KVM_IOCTL_ERROR(KVM_GET_VCPU_MMAP_SIZE, self->kvm_run_size));
> + self->run = (struct kvm_run *)mmap(NULL, self->kvm_run_size,
> + PROT_READ | PROT_WRITE, MAP_SHARED, self->vcpu_fd, 0);
> + ASSERT_NE(self->run, MAP_FAILED);
> + /**
> + * For virtual cpus that have been created with S390 user
> + * controlled virtual machines,
this line does not need to end like this, I guess?
> + * the resulting vcpu fd can be memory mapped at page offset
> + * KVM_S390_SIE_PAGE_OFFSET in order to obtain a memory map
> + * of the virtual cpu's hardware control block.
> + */
with the comment fixed:
Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
[...]
