Extend kvm_x86_ops to add mem_enc_enabled() ops. The ops can be used to check if memory encryption is enabled for a given VCPU.
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]> --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/svm.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 3195a8cc517d..cad9672fbe8c 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1076,6 +1076,7 @@ struct kvm_x86_ops { int (*mem_enc_op)(struct kvm *kvm, void __user *argp); int (*mem_enc_register_region)(struct kvm *kvm, struct kvm_enc_region *argp); int (*mem_enc_unregister_region)(struct kvm *kvm, struct kvm_enc_region *argp); + bool (*mem_enc_enabled)(struct kvm_vcpu *vcpu); }; struct kvm_arch_async_pf { diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 0bb62a114a20..208c8abf0bbd 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -6631,6 +6631,11 @@ static int svm_unregister_enc_region(struct kvm *kvm, return 0; } +static bool mem_enc_enabled(struct kvm_vcpu *vcpu) +{ + return to_svm(vcpu)->vmcb->control.nested_ctl & SVM_NESTED_CTL_SEV_ENABLE; +} + static struct kvm_x86_ops svm_x86_ops __ro_after_init = { .cpu_has_kvm_support = has_svm, .disabled_by_bios = is_disabled, @@ -6745,6 +6750,7 @@ static struct kvm_x86_ops svm_x86_ops __ro_after_init = { .mem_enc_op = svm_mem_enc_op, .mem_enc_register_region = svm_register_enc_region, .mem_enc_unregister_region = svm_unregister_enc_region, + .mem_enc_enabled = mem_enc_enabled }; static int __init svm_init(void) -- 2.9.5
