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| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-07-12 11:18:45 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-07-12 11:18:45 -0400 |
| commit | f3996d4d7996ef3ccddf6bd47edfba07f35cc425 (patch) | |
| tree | 1b11da89038c700b91e0af61becde9ecf40c18ea /include/uapi/linux | |
| parent | eb162c941c0bf49e2e764191dcacad53edc4cbe1 (diff) | |
| parent | 9ff0e37c68821d1a6c482cb258ad3b4696f91254 (diff) | |
Merge branch 'kvm-prefault' into HEAD
Pre-population has been requested several times to mitigate KVM page faults
during guest boot or after live migration. It is also required by TDX
before filling in the initial guest memory with measured contents.
Introduce it as a generic API.
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/kvm.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index d03842abae57..e5af8c692dc0 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -917,6 +917,7 @@ struct kvm_enable_cap { #define KVM_CAP_MEMORY_ATTRIBUTES 233 #define KVM_CAP_GUEST_MEMFD 234 #define KVM_CAP_VM_TYPES 235 +#define KVM_CAP_PRE_FAULT_MEMORY 236 struct kvm_irq_routing_irqchip { __u32 irqchip; @@ -1548,4 +1549,13 @@ struct kvm_create_guest_memfd { __u64 reserved[6]; }; +#define KVM_PRE_FAULT_MEMORY _IOWR(KVMIO, 0xd5, struct kvm_pre_fault_memory) + +struct kvm_pre_fault_memory { + __u64 gpa; + __u64 size; + __u64 flags; + __u64 padding[5]; +}; + #endif /* __LINUX_KVM_H */ |