From 4af663c2f64a8d252e690c60cf8b8abf22dc2951 Mon Sep 17 00:00:00 2001 From: Michael Roth Date: Wed, 1 May 2024 02:10:48 -0500 Subject: KVM: SEV: Allow per-guest configuration of GHCB protocol version The GHCB protocol version may be different from one guest to the next. Add a field to track it for each KVM instance and extend KVM_SEV_INIT2 to allow it to be configured by userspace. Now that all SEV-ES support for GHCB protocol version 2 is in place, go ahead and default to it when creating SEV-ES guests through the new KVM_SEV_INIT2 interface. Keep the older KVM_SEV_ES_INIT interface restricted to GHCB protocol version 1. Suggested-by: Sean Christopherson Signed-off-by: Michael Roth Message-ID: <20240501071048.2208265-5-michael.roth@amd.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/svm/svm.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86/kvm/svm/svm.h') diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 6fd0f5862681..9ae0c57c7d20 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -87,6 +87,7 @@ struct kvm_sev_info { struct list_head regions_list; /* List of registered regions */ u64 ap_jump_table; /* SEV-ES AP Jump Table address */ u64 vmsa_features; + u16 ghcb_version; /* Highest guest GHCB protocol version allowed */ struct kvm *enc_context_owner; /* Owner of copied encryption context */ struct list_head mirror_vms; /* List of VMs mirroring */ struct list_head mirror_entry; /* Use as a list entry of mirrors */ -- cgit v1.2.3