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x86: display extended apic registers with print_local_APIC and cpu_debug code

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Both print_local_APIC (used when apic=debug kernel param is set) and
cpu_debug code missed support for some extended APIC registers that
I'd like to see.

This adds support to show:

 - extended APIC feature register
 - extended APIC control register
 - extended LVT registers

[ Impact: print more debug info ]

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Jaswinder Singh Rajput <jaswinder@kernel.org>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090508162350.GO29045@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andreas Herrmann
2009-05-08 18:23:50 +02:00
committed by Ingo Molnar
parent 4401da6111
commit 97a5271465
4 changed files with 31 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
arch/x86/kernel/cpu/cpu_debug.c
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@@ -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");
}