KVM: s390: Add capability to support 2G hugepages

Add KVM_CAP_S390_HPAGE_2G to signal to userspace that 2G hugepages may be used to back the guest; restrictions apply similar to 1M hugepages. Enable the (for now still ignored) GMAP_FLAG_ALLOW_HPAGE_2G flag for the guest gmap, and propagate / disable it as necessary.

Claudio Imbrenda committed 5 months ago

Commit 103ff3a1 parent 782fec44 files · +36 −1Browse files

Showing the changes to include/uapi (1 of 4 files). Show all

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include/uapi/linux/kvm.h+1−0

@@ -996,6 +996,7 @@ struct kvm_enable_cap { · 995 unmodified lines
996	996	#define KVM_CAP_S390_USER_OPEREXEC 246
997	997	#define KVM_CAP_S390_KEYOP 247
998	998	#define KVM_CAP_S390_VSIE_ESAMODE 248
	999	+#define KVM_CAP_S390_HPAGE_2G 249
999	1000
1000	1001	struct kvm_irq_routing_irqchip {
1001	1002	__u32 irqchip;