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KVM: TDX: Document alignment requirements for KVM_TDX_INIT_MEM_REGION

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Since it was never possible to use a non-PAGE_SIZE-aligned @source_addr,
go ahead and document this as a requirement. This is in preparation for
enforcing page-aligned @source_addr for all architectures in
guest_memfd.

Reviewed-by: Vishal Annapurve <vannapurve@google.com>
Tested-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Reviewed-by: Yan Zhao <yan.y.zhao@intel.com>
Link: https://patch.msgid.link/20260108214622.1084057-6-michael.roth@amd.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Michael Roth
2026-01-08 15:46:21 -06:00
committed by Sean Christopherson
parent dcbcc2323c
commit 189fd1b059
1 changed files with 1 additions and 1 deletions
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Documentation/virt/kvm/x86/intel-tdx.rst
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@@ -156,7 +156,7 @@ KVM_TDX_INIT_MEM_REGION
:Returns: 0 on success, <0 on error
Initialize @nr_pages TDX guest private memory starting from @gpa with userspace
provided data from @source_addr.
provided data from @source_addr. @source_addr must be PAGE_SIZE-aligned.
Note, before calling this sub command, memory attribute of the range
[gpa, gpa + nr_pages] needs to be private. Userspace can use