KVM: SVM: Track the per-CPU host save area as a VMCB pointer

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The host save area is a VMCB, track it as such to help readers follow
along, but mostly to cleanup/simplify the retrieval of the SEV-ES host
save area.

Note, the compile-time assertion that

  offsetof(struct vmcb, save) == EXPECTED_VMCB_CONTROL_AREA_SIZE

ensures that the SEV-ES save area is indeed at offset 0x400 (whoever added
the expected/architectural VMCB offsets apparently likes decimal).

No functional change intended.

Link: https://lore.kernel.org/r/20240802204511.352017-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-08-02 13:45:11 -07:00

parent 1b5ef14dc6

commit 32071fa355

2 changed files with 9 additions and 8 deletions

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15

arch/x86/kvm/svm/svm.c

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2

arch/x86/kvm/svm/svm.h

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