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KVM: Introduce KVM_MEMORY_ENCRYPT_OP ioctl

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If the hardware supports memory encryption then the
KVM_MEMORY_ENCRYPT_OP ioctl can be used by qemu to issue a platform
specific memory encryption commands.

Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: "Radim Krčmář" <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Tom Lendacky <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Brijesh Singh <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
This commit is contained in:
Brijesh Singh 2017-12-04 10:57:26 -06:00
commit 5acc5c0631
4 changed files with 26 additions and 0 deletions
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16
Documentation/virtual/kvm/api.txt
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@ -3394,6 +3394,22 @@ invalid, if invalid pages are written to (e.g. after the end of memory)
or if no page table is present for the addresses (e.g. when using
hugepages).
4.109 KVM_MEMORY_ENCRYPT_OP
Capability: basic
Architectures: x86
Type: system
Parameters: an opaque platform specific structure (in/out)
Returns: 0 on success; -1 on error
If the platform supports creating encrypted VMs then this ioctl can be used
for issuing platform-specific memory encryption commands to manage those
encrypted VMs.
Currently, this ioctl is used for issuing Secure Encrypted Virtualization
(SEV) commands on AMD Processors. The SEV commands are defined in
Documentation/virtual/kvm/amd-memory-encryption.txt.
5. The kvm_run structure
------------------------