x86/HVM: drop vmfunc_intercept

Commit a1b1572833 ("VMX: add VMFUNC leaf 0 (EPTP switching) to
emulator") needlessly introduced it, and no user has appeared since.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>

xen/arch/x86/hvm/vmx/vmx.c

@@ -76,7 +76,6 @@ static void vmx_fpu_dirty_intercept(void);
 static int vmx_msr_read_intercept(unsigned int msr, uint64_t *msr_content);
 static int vmx_msr_write_intercept(unsigned int msr, uint64_t msr_content);
 static void vmx_invlpg(struct vcpu *v, unsigned long vaddr);
-static int vmx_vmfunc_intercept(struct cpu_user_regs *regs);
 
 struct vmx_pi_blocking_vcpu {
     struct list_head     list;
@@ -2311,7 +2310,6 @@ static struct hvm_function_table __initdata vmx_function_table = {
     .fpu_dirty_intercept  = vmx_fpu_dirty_intercept,
     .msr_read_intercept   = vmx_msr_read_intercept,
     .msr_write_intercept  = vmx_msr_write_intercept,
-    .vmfunc_intercept     = vmx_vmfunc_intercept,
     .handle_cd            = vmx_handle_cd,
     .set_info_guest       = vmx_set_info_guest,
     .set_rdtsc_exiting    = vmx_set_rdtsc_exiting,

xen/include/asm-x86/hvm/hvm.h

@@ -176,7 +176,6 @@ struct hvm_function_table {
     void (*fpu_dirty_intercept)(void);
     int (*msr_read_intercept)(unsigned int msr, uint64_t *msr_content);
     int (*msr_write_intercept)(unsigned int msr, uint64_t msr_content);
-    int (*vmfunc_intercept)(struct cpu_user_regs *regs);
     void (*handle_cd)(struct vcpu *v, unsigned long value);
     void (*set_info_guest)(struct vcpu *v);
     void (*set_rdtsc_exiting)(struct vcpu *v, bool_t);