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| author | Isaku Yamahata <isaku.yamahata@intel.com> | 2024-04-11 01:07:28 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-07-12 18:17:35 +0300 |
| commit | bc1a5cd002116552db4c3541e91f8a5b1b0cf65d (patch) | |
| tree | 9b31b2fe69d67e53c74a15eda904c59e6aa203f2 /include | |
| parent | 9aed7a6c0b591801177c90137df43f244e2af9bb (diff) | |
| download | linux-bc1a5cd002116552db4c3541e91f8a5b1b0cf65d.tar.xz | |
KVM: Add KVM_PRE_FAULT_MEMORY vcpu ioctl to pre-populate guest memory
Add a new ioctl KVM_PRE_FAULT_MEMORY in the KVM common code. It iterates on the
memory range and calls the arch-specific function. The implementation is
optional and enabled by a Kconfig symbol.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Message-ID: <819322b8f25971f2b9933bfa4506e618508ad782.1712785629.git.isaku.yamahata@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 5 | ||||
| -rw-r--r-- | include/uapi/linux/kvm.h | 10 |
2 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 7b57878c8c18..c3c922bf077f 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -2477,4 +2477,9 @@ long kvm_gmem_populate(struct kvm *kvm, gfn_t gfn, void __user *src, long npages void kvm_arch_gmem_invalidate(kvm_pfn_t start, kvm_pfn_t end); #endif +#ifdef CONFIG_KVM_GENERIC_PRE_FAULT_MEMORY +long kvm_arch_vcpu_pre_fault_memory(struct kvm_vcpu *vcpu, + struct kvm_pre_fault_memory *range); +#endif + #endif 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 */ |