x86/mtrr: Make message for disabled MTRRs more descriptive

jgross1 · bp3tk0v · commit 7882b69eb6cd · 2022-12-05T11:08:25.000+01:00
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
@@ -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);
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -629,6 +629,7 @@ int __initdata changed_by_mtrr_cleanup;`
`629`	`629`	`*/`
`630`	`630`	`void __init mtrr_bp_init(void)`
`631`	`631`	`{`
	`632`	`+ const char *why = "(not available)";`
`632`	`633`	`u32 phys_addr;`
`633`	`634`
`634`	`635`	`phys_addr = 32;`
`@@ -705,12 +706,13 @@ void __init mtrr_bp_init(void)`
`705`	`706`	`changed_by_mtrr_cleanup = mtrr_cleanup(phys_addr);`
`706`	`707`	`} else {`
`707`	`708`	`mtrr_if = NULL;`
	`709`	`+ why = "by BIOS";`
`708`	`710`	`}`
`709`	`711`	`}`
`710`	`712`	`}`
`711`	`713`
`712`	`714`	`if (!mtrr_enabled())`
`713`		`- pr_info("Disabled\n");`
	`715`	`+ pr_info("MTRRs disabled %s\n", why);`
`714`	`716`	`}`
`715`	`717`
`716`	`718`	`/**`