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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-26 12:54:45 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-02 22:30:45 +0300 |
| commit | b59b153d1026b73deb032d01bb9319ebba896006 (patch) | |
| tree | c51a8fe48de9c34c3a778eb9e798563c6abac176 /arch/x86/kvm/xen.h | |
| parent | c462f859f895840e7cd4f20f822ad4c6df2db489 (diff) | |
| download | linux-b59b153d1026b73deb032d01bb9319ebba896006.tar.xz | |
KVM: x86: allow compiling out the Xen hypercall interface
The Xen hypercall interface adds to the attack surface of the hypervisor
and will be used quite rarely. Allow compiling it out.
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/xen.h')
| -rw-r--r-- | arch/x86/kvm/xen.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/arch/x86/kvm/xen.h b/arch/x86/kvm/xen.h index b66a921776f4..87eaf2be9549 100644 --- a/arch/x86/kvm/xen.h +++ b/arch/x86/kvm/xen.h @@ -9,6 +9,7 @@ #ifndef __ARCH_X86_KVM_XEN_H__ #define __ARCH_X86_KVM_XEN_H__ +#ifdef CONFIG_KVM_XEN #include <linux/jump_label_ratelimit.h> extern struct static_key_false_deferred kvm_xen_enabled; @@ -18,7 +19,6 @@ int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data); int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data); int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data); -int kvm_xen_hypercall(struct kvm_vcpu *vcpu); int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data); int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc); void kvm_xen_destroy_vm(struct kvm *kvm); @@ -38,6 +38,28 @@ static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu) return 0; } +#else +static inline int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data) +{ + return 1; +} + +static inline void kvm_xen_destroy_vm(struct kvm *kvm) +{ +} + +static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm) +{ + return false; +} + +static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu) +{ + return 0; +} +#endif + +int kvm_xen_hypercall(struct kvm_vcpu *vcpu); /* 32-bit compatibility definitions, also used natively in 32-bit build */ #include <asm/pvclock-abi.h> |