On 27/02/2018 15:28, Tony Krowiak wrote:
Provides interfaces to assign AP adapters, usage domains and control domains to a KVM guest. A KVM guest is started by executing the Start Interpretive Execution (SIE) instruction. The SIE state description is a control block that contains the state information for a KVM guest and is supplied as input to the SIE instruction. The SIE state description has a satellite structure called the Crypto Control Block (CRYCB). The CRYCB contains three bitmask fields identifying the adapters, queues (domains) and control domains assigned to the KVM guest: * The AP Adapter Mask (APM) field identifies the AP adapters assigned to the KVM guest * The AP Queue Mask (AQM) field identifies the AP queues assigned to the KVM guest. Each AP queue is connected to a usage domain within an AP adapter. * The AP Domain Mask (ADM) field identifies the control domains assigned to the KVM guest. Each adapter, queue (usage domain) and control domain are identified by a number from 0 to 255. The bits in each mask, from most significant to least significant bit, correspond to the numbers 0-255. When a bit is set, the corresponding adapter, queue (usage domain) or control domain is assigned to the KVM guest.
...snip...
static int kvm_ap_apxa_installed(void) { int ret; @@ -50,3 +170,140 @@ void kvm_ap_set_crycb_format(struct kvm *kvm, __u32 *crycbd) *crycbd |= CRYCB_FORMAT1; } } + +static int kvm_ap_matrix_apm_create(struct kvm_ap_matrix *ap_matrix, int apxa) +{ + if (apxa) + ap_matrix->apm_max = 256;
AFAIK the number of possible bits in the masks for a system is not a generic value but is
returned by the QCI instruction. Is there a reason to use a fix value?
+ else + ap_matrix->apm_max = 64; + + ap_matrix->apm = kzalloc(KVM_AP_MASK_BYTES(ap_matrix->apm_max), + GFP_KERNEL); + if (!ap_matrix->apm) + return -ENOMEM; + + return 0; +} + +static int kvm_ap_matrix_aqm_create(struct kvm_ap_matrix *ap_matrix, int apxa) +{ + if (apxa) + ap_matrix->aqm_max = 256;
same here
+ else + ap_matrix->aqm_max = 16; + + ap_matrix->aqm = kzalloc(KVM_AP_MASK_BYTES(ap_matrix->aqm_max), + GFP_KERNEL); + if (!ap_matrix->aqm) + return -ENOMEM; + + return 0; +} + +static int kvm_ap_matrix_adm_create(struct kvm_ap_matrix *ap_matrix, int apxa) +{ + if (apxa) + ap_matrix->adm_max = 256;
and here Pierre -- Pierre Morel Linux/KVM/QEMU in Böblingen - Germany -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html