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KVM: Add a dedicated API for setting KVM-internal memslots

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Add a dedicated API for setting internal memslots, and have it explicitly
disallow setting userspace memslots.  Setting a userspace memslots without
a direct command from userspace would result in all manner of issues.

No functional change intended.

Cc: Tao Su <tao1.su@linux.intel.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Link: https://lore.kernel.org/r/20250111002022.1230573-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2025-01-10 16:20:20 -08:00
parent d131f0042f
commit 156bffdb2b
3 changed files with 15 additions and 6 deletions
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4
include/linux/kvm_host.h
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@@ -1192,8 +1192,8 @@ enum kvm_mr_change {
KVM_MR_FLAGS_ONLY,
};
int __kvm_set_memory_region(struct kvm *kvm,
const struct kvm_userspace_memory_region2 *mem);
int kvm_set_internal_memslot(struct kvm *kvm,
const struct kvm_userspace_memory_region2 *mem);
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot);
void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen);
int kvm_arch_prepare_memory_region(struct kvm *kvm,