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KVM: s390: fake memslot for ucontrol VMs

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Create a fake memslot for ucontrol VMs. The fake memslot identity-maps
userspace.

Now memslots will always be present, and ucontrol is not a special case
anymore.

Suggested-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20250123144627.312456-4-imbrenda@linux.ibm.com
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20250123144627.312456-4-imbrenda@linux.ibm.com>
This commit is contained in:
Claudio Imbrenda
2025-01-23 15:46:15 +01:00
parent decff09adb
commit 413c98f24c
4 changed files with 21 additions and 2 deletions
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2
Documentation/virt/kvm/api.rst
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@@ -1419,7 +1419,7 @@ fetch) is injected in the guest.
S390:
^^^^^
Returns -EINVAL if the VM has the KVM_VM_S390_UCONTROL flag set.
Returns -EINVAL or -EEXIST if the VM has the KVM_VM_S390_UCONTROL flag set.
Returns -EINVAL if called on a protected VM.
4.36 KVM_SET_TSS_ADDR