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target/s390x/kvm: Turn KVM_CAP_SYNC_REGS into a hard requirement

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Since we already require at least kernel 3.15 in the s390x KVM code,
we can assume that the KVM_CAP_SYNC_REGS capability is always there.
Thus turn this into a hard requirement now.

Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Message-ID: <20231011080538.796999-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2023-10-11 10:05:37 +02:00
parent 219922ef9b
commit c35a79cbd7
1 changed files with 14 additions and 6 deletions
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20
target/s390x/kvm/kvm.c
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@ -338,21 +338,29 @@ int kvm_arch_get_default_type(MachineState *ms)
int kvm_arch_init(MachineState *ms, KVMState *s)
{
int required_caps[] = {
KVM_CAP_DEVICE_CTRL,
KVM_CAP_SYNC_REGS,
};
for (int i = 0; i < ARRAY_SIZE(required_caps); i++) {
if (!kvm_check_extension(s, required_caps[i])) {
error_report("KVM is missing capability #%d - "
"please use kernel 3.15 or newer", required_caps[i]);
return -1;
}
}
object_class_foreach(ccw_machine_class_foreach, TYPE_S390_CCW_MACHINE,
false, NULL);
if (!kvm_check_extension(kvm_state, KVM_CAP_DEVICE_CTRL)) {
error_report("KVM is missing capability KVM_CAP_DEVICE_CTRL - "
"please use kernel 3.15 or newer");
return -1;
}
if (!kvm_check_extension(s, KVM_CAP_S390_COW)) {
error_report("KVM is missing capability KVM_CAP_S390_COW - "
"unsupported environment");
return -1;
}
cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
cap_sync_regs = true;
cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);
cap_mem_op_extension = kvm_check_extension(s, KVM_CAP_S390_MEM_OP_EXTENSION);