hyperv.h

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __KVM_X86_VMX_HYPERV_H
#define __KVM_X86_VMX_HYPERV_H
 
#include <linux/kvm_host.h>
#include "vmcs12.h"
#include "vmx.h"
 
#define EVMPTR_INVALID (-1ULL)
#define EVMPTR_MAP_PENDING (-2ULL)
 
enum nested_evmptrld_status {
    EVMPTRLD_DISABLED,
    EVMPTRLD_SUCCEEDED,
    EVMPTRLD_VMFAIL,
    EVMPTRLD_ERROR,
};
 
#ifdef CONFIG_KVM_HYPERV
static inline bool evmptr_is_valid(u64 evmptr)
{
    return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
}
 
static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
{
    return evmptr_is_valid(vmx->nested.hv_evmcs_vmptr);
}
 
static inline bool evmptr_is_set(u64 evmptr)
{
    return evmptr != EVMPTR_INVALID;
}
 
static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
{
    return evmptr_is_set(vmx->nested.hv_evmcs_vmptr);
}
 
static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)
{
    return vmx->nested.hv_evmcs;
}
 
static inline bool guest_cpuid_has_evmcs(struct kvm_vcpu *vcpu)
{
    /*
     * eVMCS is exposed to the guest if Hyper-V is enabled in CPUID and
     * eVMCS has been explicitly enabled by userspace.
     */
    return vcpu->arch.hyperv_enabled &&
           to_vmx(vcpu)->nested.enlightened_vmcs_enabled;
}
 
u64 nested_get_evmptr(struct kvm_vcpu *vcpu);
uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
int nested_enable_evmcs(struct kvm_vcpu *vcpu,
            uint16_t *vmcs_version);
void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
bool nested_evmcs_l2_tlb_flush_enabled(struct kvm_vcpu *vcpu);
void vmx_hv_inject_synthetic_vmexit_post_tlb_flush(struct kvm_vcpu *vcpu);
#else
static inline bool evmptr_is_valid(u64 evmptr)
{
    return false;
}
 
static inline bool nested_vmx_is_evmptr12_valid(struct vcpu_vmx *vmx)
{
    return false;
}
 
static inline bool evmptr_is_set(u64 evmptr)
{
    return false;
}
 
static inline bool nested_vmx_is_evmptr12_set(struct vcpu_vmx *vmx)
{
    return false;
}
 
static inline struct hv_enlightened_vmcs *nested_vmx_evmcs(struct vcpu_vmx *vmx)
{
    return NULL;
}
#endif
 
#endif /* __KVM_X86_VMX_HYPERV_H */