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KVM: Documentation: document KVM_{GET,SET}_NESTED_STATE for SVM

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Document the nested state constants and structures for SVM that were added
by commit cc440cdad5 ("KVM: nSVM: implement KVM_GET_NESTED_STATE and
KVM_SET_NESTED_STATE").

Fixes: cc440cdad5 ("KVM: nSVM: implement KVM_GET_NESTED_STATE and KVM_SET_NESTED_STATE")
Signed-off-by: Jim Mattson <jmattson@google.com>
Link: https://patch.msgid.link/20260407190343.325299-8-jmattson@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Jim Mattson 2026-04-07 12:03:30 -07:00 committed by Sean Christopherson
parent d65cf222b8
commit 32ebdbce3b
1 changed files with 11 additions and 0 deletions
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11
Documentation/virt/kvm/api.rst
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@ -4944,10 +4944,13 @@ Errors:
#define KVM_STATE_NESTED_FORMAT_SVM 1
#define KVM_STATE_NESTED_VMX_VMCS_SIZE 0x1000
#define KVM_STATE_NESTED_SVM_VMCB_SIZE 0x1000
#define KVM_STATE_NESTED_VMX_SMM_GUEST_MODE 0x00000001
#define KVM_STATE_NESTED_VMX_SMM_VMXON 0x00000002
#define KVM_STATE_NESTED_GIF_SET 0x00000100
#define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001
struct kvm_vmx_nested_state_hdr {
@ -4962,11 +4965,19 @@ Errors:
__u64 preemption_timer_deadline;
};
struct kvm_svm_nested_state_hdr {
__u64 vmcb_pa;
};
struct kvm_vmx_nested_state_data {
__u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];
__u8 shadow_vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];
};
struct kvm_svm_nested_state_data {
__u8 vmcb12[KVM_STATE_NESTED_SVM_VMCB_SIZE];
};
This ioctl copies the vcpu's nested virtualization state from the kernel to
userspace.