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Date: Fri, 8 May 2009 18:23:50 +0200
From: Andreas Herrmann <andreas.herrmann3@....com>
To: Ingo Molnar <mingo@...e.hu>
CC: linux-kernel@...r.kernel.org
Subject: [PATCH] x86: display extended apic registers with print_local_APIC
and cpu_debug code
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
Signed-off-by: Andreas Herrmann <andreas.herrmann3@....com>
---
arch/x86/include/asm/apicdef.h | 8 ++++----
arch/x86/kernel/apic/apic.c | 2 +-
arch/x86/kernel/apic/io_apic.c | 14 +++++++++++++-
arch/x86/kernel/cpu/cpu_debug.c | 14 +++++++++++++-
4 files changed, 31 insertions(+), 7 deletions(-)
Please apply.
Thanks,
Andreas
diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h
index bc9514f..7ddb36a 100644
--- a/arch/x86/include/asm/apicdef.h
+++ b/arch/x86/include/asm/apicdef.h
@@ -22,6 +22,7 @@
# define APIC_INTEGRATED(x) (1)
#endif
#define APIC_XAPIC(x) ((x) >= 0x14)
+#define APIC_EXT_SPACE(x) ((x) & 0x80000000)
#define APIC_TASKPRI 0x80
#define APIC_TPRI_MASK 0xFFu
#define APIC_ARBPRI 0x90
@@ -116,7 +117,9 @@
#define APIC_TDR_DIV_32 0x8
#define APIC_TDR_DIV_64 0x9
#define APIC_TDR_DIV_128 0xA
-#define APIC_EILVT0 0x500
+#define APIC_EFEAT 0x400
+#define APIC_ECTRL 0x410
+#define APIC_EILVTn(n) (0x500 + 0x10 * n)
#define APIC_EILVT_NR_AMD_K8 1 /* # of extended interrupts */
#define APIC_EILVT_NR_AMD_10H 4
#define APIC_EILVT_LVTOFF(x) (((x) >> 4) & 0xF)
@@ -125,9 +128,6 @@
#define APIC_EILVT_MSG_NMI 0x4
#define APIC_EILVT_MSG_EXT 0x7
#define APIC_EILVT_MASKED (1 << 16)
-#define APIC_EILVT1 0x510
-#define APIC_EILVT2 0x520
-#define APIC_EILVT3 0x530
#define APIC_BASE (fix_to_virt(FIX_APIC_BASE))
#define APIC_BASE_MSR 0x800
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index f287092..a0d4865 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -348,7 +348,7 @@ static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen)
static void setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask)
{
- unsigned long reg = (lvt_off << 4) + APIC_EILVT0;
+ unsigned long reg = (lvt_off << 4) + APIC_EILVTn(0);
unsigned int v = (mask << 16) | (msg_type << 8) | vector;
apic_write(reg, v);
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 30da617..7823754 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1869,7 +1869,7 @@ __apicdebuginit(void) print_APIC_bitfield(int base)
__apicdebuginit(void) print_local_APIC(void *dummy)
{
- unsigned int v, ver, maxlvt;
+ unsigned int i, v, ver, maxlvt;
u64 icr;
if (apic_verbosity == APIC_QUIET)
@@ -1957,6 +1957,18 @@ __apicdebuginit(void) print_local_APIC(void *dummy)
printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v);
v = apic_read(APIC_TDCR);
printk(KERN_DEBUG "... APIC TDCR: %08x\n", v);
+
+ if (boot_cpu_has(X86_FEATURE_EXTAPIC)) {
+ v = apic_read(APIC_EFEAT);
+ maxlvt = (v >> 16) & 0xff;
+ printk(KERN_DEBUG "... APIC EFEAT: %08x\n", v);
+ v = apic_read(APIC_ECTRL);
+ printk(KERN_DEBUG "... APIC ECTRL: %08x\n", v);
+ for (i = 0; i < maxlvt; i++) {
+ v = apic_read(APIC_EILVTn(i));
+ printk(KERN_DEBUG "... APIC EILVT%d: %08x\n", i, v);
+ }
+ }
printk("\n");
}
diff --git a/arch/x86/kernel/cpu/cpu_debug.c b/arch/x86/kernel/cpu/cpu_debug.c
index 46e29ab..2fc4f6b 100644
--- 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");
}
--
1.6.2
--
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