x86/ucode: Drop ops->match_cpu()

It turns out there are no callers of the hook().  The only callers are the
local, which can easily be rearranged to use the appropriate internal helper.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

xen/arch/x86/cpu/microcode/amd.c

@@ -188,11 +188,6 @@ static enum microcode_match_result microcode_fits(
     return NEW_UCODE;
 }
 
-static bool match_cpu(const struct microcode_patch *patch)
-{
-    return patch && (microcode_fits(patch) == NEW_UCODE);
-}
-
 static void free_patch(struct microcode_patch *patch)
 {
     xfree(patch);
@@ -227,7 +222,7 @@ static int apply_microcode(const struct microcode_patch *patch)
     if ( !patch )
         return -ENOENT;
 
-    if ( !match_cpu(patch) )
+    if ( microcode_fits(patch) != NEW_UCODE )
         return -EINVAL;
 
     if ( check_final_patch_levels(sig) )
@@ -428,5 +423,4 @@ const struct microcode_ops amd_ucode_ops = {
 #endif
     .free_patch                       = free_patch,
     .compare_patch                    = compare_patch,
-    .match_cpu                        = match_cpu,
 };

xen/arch/x86/cpu/microcode/intel.c

@@ -245,14 +245,6 @@ static enum microcode_match_result microcode_update_match(
     return mc->rev > cpu_sig->rev ? NEW_UCODE : OLD_UCODE;
 }
 
-static bool match_cpu(const struct microcode_patch *patch)
-{
-    if ( !patch )
-        return false;
-
-    return microcode_update_match(patch) == NEW_UCODE;
-}
-
 static void free_patch(struct microcode_patch *patch)
 {
     xfree(patch);
@@ -281,7 +273,7 @@ static int apply_microcode(const struct microcode_patch *patch)
     if ( !patch )
         return -ENOENT;
 
-    if ( !match_cpu(patch) )
+    if ( microcode_update_match(patch) != NEW_UCODE )
         return -EINVAL;
 
     /* write microcode via MSR 0x79 */
@@ -369,5 +361,4 @@ const struct microcode_ops intel_ucode_ops = {
     .apply_microcode                  = apply_microcode,
     .free_patch                       = free_patch,
     .compare_patch                    = compare_patch,
-    .match_cpu                        = match_cpu,
 };

xen/arch/x86/cpu/microcode/private.h

@@ -59,12 +59,6 @@ struct microcode_ops {
     /* Free a patch previously allocated by cpu_request_microcode(). */
     void (*free_patch)(struct microcode_patch *patch);
 
-    /*
-     * Is the microcode patch applicable for the current CPU, and newer than
-     * the currently running patch?
-     */
-    bool (*match_cpu)(const struct microcode_patch *patch);
-
     /*
      * Given two patches, are they both applicable to the current CPU, and is
      * new a higher revision than old?