x86/mtrr: Make message for disabled MTRRs more descriptive

Instead of just saying "Disabled" when MTRRs are disabled for any
reason, tell what is disabled and why.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20221205080433.16643-3-jgross@suse.com

diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.c b/arch/x86/kernel/cpu/mtrr/mtrr.c
index 6432abccbf56d9e3b041824232f69ffc3a7f2463..783f3210d5827ecf68e5a9b97eb0a869539a9de6 100644 (file)
--- a/arch/x86/kernel/cpu/mtrr/mtrr.c
+++ b/arch/x86/kernel/cpu/mtrr/mtrr.c
@@ -629,6 +629,7 @@ int __initdata changed_by_mtrr_cleanup;
  */
 void __init mtrr_bp_init(void)
 {
+       const char *why = "(not available)";
        u32 phys_addr;
 
        phys_addr = 32;
@@ -705,12 +706,13 @@ void __init mtrr_bp_init(void)
                                changed_by_mtrr_cleanup = mtrr_cleanup(phys_addr);
                        } else {
                                mtrr_if = NULL;
+                               why = "by BIOS";
                        }
                }
        }
 
        if (!mtrr_enabled())
-               pr_info("Disabled\n");
+               pr_info("MTRRs disabled %s\n", why);
 }
 
 /**