Commit 51de8151 authored by Alexander Graf's avatar Alexander Graf Committed by Paolo Bonzini
Browse files

KVM: x86: Add infrastructure for MSR filtering 



In the following commits we will add pieces of MSR filtering.
To ensure that code compiles even with the feature half-merged, let's add
a few stubs and struct definitions before the real patches start.

Signed-off-by: default avatarAlexander Graf <graf@amazon.com>

Message-Id: <20200925143422.21718-4-graf@amazon.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 1ae09954

arch/x86/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -1235,6 +1235,7 @@ struct kvm_x86_ops { 
	int (*enable_direct_tlbflush)(struct kvm_vcpu *vcpu);



	void (*migrate_timers)(struct kvm_vcpu *vcpu);

	void (*msr_filter_changed)(struct kvm_vcpu *vcpu);

};



struct kvm_x86_nested_ops {

arch/x86/include/uapi/asm/kvm.h

+2 −0
Original line number Diff line number Diff line
@@ -192,6 +192,8 @@ struct kvm_msr_list { 
	__u32 indices[0];

};



#define KVM_MSR_FILTER_READ  (1 << 0)

#define KVM_MSR_FILTER_WRITE (1 << 1)



struct kvm_cpuid_entry {

	__u32 function;

arch/x86/kvm/x86.c

+6 −0
Original line number Diff line number Diff line
@@ -1488,6 +1488,12 @@ void kvm_enable_efer_bits(u64 mask) 
}

EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);



bool kvm_msr_allowed(struct kvm_vcpu *vcpu, u32 index, u32 type)

{

	return true;

}

EXPORT_SYMBOL_GPL(kvm_msr_allowed);



/*

 * Write @data into the MSR specified by @index.  Select MSR specific fault

 * checks are bypassed if @host_initiated is %true.

arch/x86/kvm/x86.h

+1 −0
Original line number Diff line number Diff line
@@ -374,6 +374,7 @@ bool kvm_vcpu_exit_request(struct kvm_vcpu *vcpu); 
int kvm_handle_memory_failure(struct kvm_vcpu *vcpu, int r,

			      struct x86_exception *e);

int kvm_handle_invpcid(struct kvm_vcpu *vcpu, unsigned long type, gva_t gva);

bool kvm_msr_allowed(struct kvm_vcpu *vcpu, u32 index, u32 type);



#define  KVM_MSR_RET_INVALID  2