x86/microcode/intel: Pass the microcode revision to print_ucode_info() directly

print_ucode_info() takes a struct ucode_cpu_info pointer as parameter.
Its sole purpose is to print the microcode revision.

The only available ucode_cpu_info always describes the currently loaded
microcode revision. After a microcode update is successful, this is the
new revision, or on failure it is the original revision.

In preparation for future changes, replace the struct ucode_cpu_info
pointer parameter with a plain integer which contains the revision
number and adjust the call sites accordingly.

No functional change.

  [ bp:
    - Fix + cleanup commit message.
    - Revert arbitrary, unrelated change.
  ]

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230120161923.118882-5-ashok.raj@intel.com

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index cac2bdb..9dbd007 100644 (file)
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -308,11 +308,10 @@ static bool load_builtin_intel_microcode(struct cpio_data *cp)
 /*
  * Print ucode update info.
  */
-static void
-print_ucode_info(struct ucode_cpu_info *uci, unsigned int date)
+static void print_ucode_info(unsigned int new_rev, unsigned int date)
 {
        pr_info_once("microcode updated early to revision 0x%x, date = %04x-%02x-%02x\n",
-                    uci->cpu_sig.rev,
+                    new_rev,
                     date & 0xffff,
                     date >> 24,
                     (date >> 16) & 0xff);
@@ -332,7 +331,7 @@ void show_ucode_info_early(void)
 
        if (delay_ucode_info) {
                intel_cpu_collect_info(&uci);
-               print_ucode_info(&uci, current_mc_date);
+               print_ucode_info(uci.cpu_sig.rev, current_mc_date);
                delay_ucode_info = 0;
        }
 }
@@ -341,33 +340,22 @@ void show_ucode_info_early(void)
  * At this point, we can not call printk() yet. Delay printing microcode info in
  * show_ucode_info_early() until printk() works.
  */
-static void print_ucode(struct ucode_cpu_info *uci)
+static void print_ucode(int new_rev, int date)
 {
-       struct microcode_intel *mc;
        int *delay_ucode_info_p;
        int *current_mc_date_p;
 
-       mc = uci->mc;
-       if (!mc)
-               return;
-
        delay_ucode_info_p = (int *)__pa_nodebug(&delay_ucode_info);
        current_mc_date_p = (int *)__pa_nodebug(&current_mc_date);
 
        *delay_ucode_info_p = 1;
-       *current_mc_date_p = mc->hdr.date;
+       *current_mc_date_p = date;
 }
 #else
 
-static inline void print_ucode(struct ucode_cpu_info *uci)
+static inline void print_ucode(int new_rev, int date)
 {
-       struct microcode_intel *mc;
-
-       mc = uci->mc;
-       if (!mc)
-               return;
-
-       print_ucode_info(uci, mc->hdr.date);
+       print_ucode_info(new_rev, date);
 }
 #endif
 
@@ -407,9 +395,9 @@ static int apply_microcode_early(struct ucode_cpu_info *uci, bool early)
        uci->cpu_sig.rev = rev;
 
        if (early)
-               print_ucode(uci);
+               print_ucode(uci->cpu_sig.rev, mc->hdr.date);
        else
-               print_ucode_info(uci, mc->hdr.date);
+               print_ucode_info(uci->cpu_sig.rev, mc->hdr.date);
 
        return 0;
 }