[xen staging] x86/ucode: Fold early_microcode_update_cpu() into its single caller

[patchbot@xxxxxxx]

commit 28d347041fd1e152ecc717b494e8cd280138733c
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Oct 25 17:24:35 2024 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Nov 5 23:42:30 2024 +0000

    x86/ucode: Fold early_microcode_update_cpu() into its single caller
    
    Diff-wise, as early_microcode_update_cpu() is the larger function, this more
    closely resembles "merge early_microcode_load() into it's single callee", 
but
    the end result is the same.
    
    At the same time, rename the len variable to size.  This is for better
    consistency with existing logic, and to reduce churn later.
    
    No functional change.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
 xen/arch/x86/cpu/microcode/core.c | 38 ++++++++++++++++----------------------
 1 file changed, 16 insertions(+), 22 deletions(-)

diff --git a/xen/arch/x86/cpu/microcode/core.c 
b/xen/arch/x86/cpu/microcode/core.c
index ef9aee4a79..f1e002a55d 100644
--- a/xen/arch/x86/cpu/microcode/core.c
+++ b/xen/arch/x86/cpu/microcode/core.c
@@ -841,28 +841,38 @@ static int __init cf_check microcode_init_cache(void)
 }
 presmp_initcall(microcode_init_cache);
 
-/* BSP calls this function to parse ucode blob and then apply an update. */
-static int __init early_microcode_update_cpu(void)
+/*
+ * There are several tasks:
+ * - Locate the ucode blob in the boot modules.
+ * - Parse and attempt in-place load.
+ * - Inform microcode_init_cache() of how to find the blob again.
+ */
+static int __init early_microcode_load(struct boot_info *bi)
 {
     const void *data = NULL;
-    size_t len;
+    size_t size;
     struct microcode_patch *patch;
 
+    microcode_grab_module(bi);
+
+    if ( !ucode_mod.mod_end && !ucode_blob.size )
+        return 0;
+
     if ( ucode_blob.size )
     {
-        len = ucode_blob.size;
+        size = ucode_blob.size;
         data = ucode_blob.data;
     }
     else if ( ucode_mod.mod_end )
     {
-        len = ucode_mod.mod_end;
+        size = ucode_mod.mod_end;
         data = bootstrap_map(&ucode_mod);
     }
 
     if ( !data )
         return -ENOMEM;
 
-    patch = ucode_ops.cpu_request_microcode(data, len, false);
+    patch = ucode_ops.cpu_request_microcode(data, size, false);
     if ( IS_ERR(patch) )
     {
         printk(XENLOG_WARNING "Parsing microcode blob error %ld\n",
@@ -876,22 +886,6 @@ static int __init early_microcode_update_cpu(void)
     return microcode_update_cpu(patch, 0);
 }
 
-/*
- * There are several tasks:
- * - Locate the ucode blob in the boot modules.
- * - Parse and attempt in-place load.
- * - Inform microcode_init_cache() of how to find the blob again.
- */
-static int __init early_microcode_load(struct boot_info *bi)
-{
-    microcode_grab_module(bi);
-
-    if ( !ucode_mod.mod_end && !ucode_blob.size )
-        return 0;
-
-    return early_microcode_update_cpu();
-}
-
 int __init early_microcode_init(struct boot_info *bi)
 {
     const struct cpuinfo_x86 *c = &boot_cpu_data;
--
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