x86: display extended apic registers with print_local_APIC and cpu_debug code

[~andy/linux] / arch / x86 / kernel / cpu / cpu_debug.c

diff --git a/arch/x86/kernel/cpu/cpu_debug.c b/arch/x86/kernel/cpu/cpu_debug.c
index 46e29ab96c6ac9d6765f0f1a89e7c043ed2f5cbd..2fc4f6bb9ca5116b32f654ba4e35be616712ba9f 100644 (file)
--- a/arch/x86/kernel/cpu/cpu_debug.c
+++ b/arch/x86/kernel/cpu/cpu_debug.c
@@ -588,8 +588,20 @@ static void print_apic(void *arg)
        seq_printf(seq, " TMICT\t\t: %08x\n",  apic_read(APIC_TMICT));
        seq_printf(seq, " TMCCT\t\t: %08x\n",  apic_read(APIC_TMCCT));
        seq_printf(seq, " TDCR\t\t: %08x\n",  apic_read(APIC_TDCR));
-#endif /* CONFIG_X86_LOCAL_APIC */
+       if (boot_cpu_has(X86_FEATURE_EXTAPIC)) {
+               unsigned int i, v, maxeilvt;
+
+               v = apic_read(APIC_EFEAT);
+               maxeilvt = (v >> 16) & 0xff;
+               seq_printf(seq, " EFEAT\t\t: %08x\n", v);
+               seq_printf(seq, " ECTRL\t\t: %08x\n", apic_read(APIC_ECTRL));
 
+               for (i = 0; i < maxeilvt; i++) {
+                       v = apic_read(APIC_EILVTn(i));
+                       seq_printf(seq, " EILVT%d\t\t: %08x\n", i, v);
+               }
+       }
+#endif /* CONFIG_X86_LOCAL_APIC */
        seq_printf(seq, "\n MSR\t:\n");
 }