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KVM: s390: Update KVM_PRE_FAULT_MEMORY API documentation

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Update the API documentation for KVM_PRE_FAULT_MEMORY to account for
its s390 implementation.

Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260527144358.186359-4-imbrenda@linux.ibm.com>
This commit is contained in:
Claudio Imbrenda 2026-05-27 16:43:56 +02:00
parent bea77e83c0
commit a5aa761e73
1 changed files with 3 additions and 2 deletions
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5
Documentation/virt/kvm/api.rst
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@ -6471,7 +6471,8 @@ Errors:
========== ===============================================================
EINVAL The specified `gpa` and `size` were invalid (e.g. not
page aligned, causes an overflow, or size is zero).
page aligned, causes an overflow, or size is zero), or the VM
is UCONTROL (s390).
ENOENT The specified `gpa` is outside defined memslots.
EINTR An unmasked signal is pending and no page was processed.
EFAULT The parameter address was invalid.
@ -6494,7 +6495,7 @@ Errors:
KVM_PRE_FAULT_MEMORY populates KVM's stage-2 page tables used to map memory
for the current vCPU state. KVM maps memory as if the vCPU generated a
stage-2 read page fault, e.g. faults in memory as needed, but doesn't break
CoW. However, KVM does not mark any newly created stage-2 PTE as Accessed.
CoW. On x86, KVM does not mark any newly created stage-2 PTE as Accessed.
In the case of confidential VM types where there is an initial set up of
private guest memory before the guest is 'finalized'/measured, this ioctl