KVM: TDX: Add place holder for TDX VM specific mem_enc_op ioctl

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KVM_MEMORY_ENCRYPT_OP was introduced for VM-scoped operations specific for
guest state-protected VM.  It defined subcommands for technology-specific
operations under KVM_MEMORY_ENCRYPT_OP.  Despite its name, the subcommands
are not limited to memory encryption, but various technology-specific
operations are defined.  It's natural to repurpose KVM_MEMORY_ENCRYPT_OP
for TDX specific operations and define subcommands.

Add a place holder function for TDX specific VM-scoped ioctl as mem_enc_op.
TDX specific sub-commands will be added to retrieve/pass TDX specific
parameters.  Make mem_enc_ioctl non-optional as it's always filled.

Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Co-developed-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Signed-off-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
---
 - Drop the misleading "defined for consistency" line. It's a copy-paste
   error introduced in the earlier patches. Earlier there was padding at
   the end to match struct kvm_sev_cmd size. (Tony)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Isaku Yamahata 2024-10-30 12:00:28 -07:00 • committed by Paolo Bonzini

parent e4aa6f6961

commit b2aaf38ced

6 changed files with 72 additions and 5 deletions

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2

arch/x86/include/asm/kvm-x86-ops.h

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arch/x86/include/uapi/asm/kvm.h

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arch/x86/kvm/vmx/main.c

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arch/x86/kvm/vmx/tdx.c

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arch/x86/kvm/vmx/x86_ops.h

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arch/x86/kvm/x86.c

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