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Date: Thu, 05 Mar 2009 00:46:23 +0530
From: Jaswinder Singh Rajput <jaswinder@...nel.org>
To: Ingo Molnar <mingo@...e.hu>
Cc: "H. Peter Anvin" <hpa@...or.com>, x86 maintainers <x86@...nel.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git-pull -tip] x86: msr architecture debug code
On Mon, 2009-03-02 at 21:54 +0100, Ingo Molnar wrote:
> Please vertical-align structure field definitions, like you see
> we do it elsewhere in the x86 code.
>
done.
> > +
> > +#include <linux/module.h>
> > +#include <linux/kernel.h>
> > +#include <linux/debugfs.h>
> > +#include <linux/seq_file.h>
> > +#include <asm/msr_debug.h>
>
> Please have a good look at what the standard include files
> section look like - for example in
> arch/x86/kernel/cpu/perf_counter.c or in arch/x86/mm/fault.c.
> Please use that same ordering of the lines here too.
>
hmm, currently for my file these header files are more than enough, when
I will keep on add more stuff then header count will also increase and I
will do ordering.
> > +static int get_msr_intel_bit(unsigned model)
> > +{
> > + int ret = 0;
> > +
> > + switch (model) {
> > + case 0x0501:
> > + case 0x0502:
> > + case 0x0504:
> > + ret = MSR_INTEL_PENTIUM;
> > + break;
> > + case 0x0601:
> > + case 0x0603:
> > + case 0x0605:
> > + case 0x0607:
> > + case 0x0608:
> > + case 0x060A:
> > + case 0x060B:
> > + ret = MSR_INTEL_P6;
> > + break;
> > + case 0x0609:
> > + case 0x060D:
> > + ret = MSR_INTEL_PENTIUM_M;
> > + break;
> > + case 0x060E:
> > + ret = MSR_INTEL_CORE;
> > + break;
> > + case 0x060F:
> > + case 0x0617:
> > + ret = MSR_INTEL_CORE_2;
> > + break;
> > + case 0x061C:
> > + ret = MSR_INTEL_ATOM;
> > + break;
> > + case 0x0F00:
> > + case 0x0F01:
> > + case 0x0F02:
> > + case 0x0F03:
> > + case 0x0F04:
> > + ret = MSR_INTEL_XEON;
> > + break;
> > + case 0x0F06:
> > + ret = MSR_INTEL_XEON_MP;
> > + break;
> > + }
>
> all these magic constants open-coded look a bit ugly. Can it be
> done cleaner?
>
Then I need to do if-else and then it will become more ugly and every
time we need to add more magic numbers, it will also effect others.
> Check how structure initializations are done in other places of
> the x86 tree - for example perf_counters.c. Apply that style
> here too please.
>
I have made some changes. Please check is it OK.
> > +
> > +static struct dentry *msr_file, *pmc_file, *msr_dir;
> > +static int __init msr_debug_init(void)
>
> missing newline after static variables.
>
Done :-)
> > +{
> > + struct cpuinfo_x86 *cpu = &cpu_data(0);
> > +
> > + if (!cpu_has(cpu, X86_FEATURE_MSR))
> > + return -ENODEV;
> > +
> > + msr_dir = debugfs_create_dir("msr", arch_debugfs_dir);
> > +
> > + msr_file = debugfs_create_file("msr", S_IRUGO, msr_dir,
> > + NULL, &msr_fops);
> > + pmc_file = debugfs_create_file("pmc", S_IRUGO, msr_dir,
> > + NULL, &pmc_fops);
>
> I think it would be possible to have a much more intuitive file
> layout under /debug/x86/msr/ than these two /debug/x86/msr/msr
> and /debug/x86/msr/pmc files.
>
> Firstly, it should move one level deeper, to /debug/x86/cpu/msr/
> - because the MSR is really a property of the CPU, and there are
> other properties of the CPU we might want to expose in the
> future.
>
Done.
> Regarding the msr directory: one good approach would be to have
> have several "topic" directories under /debug/x86/cpu/msr/.
>
> One such topic would be the 'pmu', with a structure like:
>
> /debug/x86/cpu/msr/pmu/
> /debug/x86/cpu/msr/pmu/pmc_0/
> /debug/x86/cpu/msr/pmu/pmc_0/counter
> /debug/x86/cpu/msr/pmu/pmc_0/eventsel
>
> There would also be a /debug/x86/cpu/msr/raw/ directory with all
> MSR numbers we know about explicitly, for example:
>
> /debug/x86/cpu/msr/raw/0x372/value
> /debug/x86/cpu/msr/raw/0x372/width
>
> Maybe a symlink pointing it back to the topic directory would be
> useful as well. For example:
>
> /debug/x86/cpu/msr/raw/0x372/topic_dir -> /debug/x86/cpu/msr/pmu/pmc_0/
>
OK I like this, and I will do in next phase.
> Other "topic directories" are possible too: a
> /debug/x86/cpu/msr/apic/ layout would be very useful and
> informative as well, and so are some of the other MSRs we tweak
> during bootup.
>
Done.
Here is new request pull:
The following changes since commit 1d10914bf2c8a1164aef6c341e6c3518a91b8374:
Ingo Molnar (1):
Merge branch 'core/percpu'
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6-tip-cpu.git master
Jaswinder Singh Rajput (1):
x86: msr architecture debug code
arch/x86/include/asm/msr_debug.h | 163 ++++++++++++++
arch/x86/kernel/cpu/Makefile | 2 +-
arch/x86/kernel/cpu/msr_debug.c | 461 ++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/kdebugfs.c | 7 +
4 files changed, 632 insertions(+), 1 deletions(-)
create mode 100755 arch/x86/include/asm/msr_debug.h
create mode 100755 arch/x86/kernel/cpu/msr_debug.c
diff --git a/arch/x86/include/asm/msr_debug.h b/arch/x86/include/asm/msr_debug.h
new file mode 100755
index 0000000..fd03923
--- /dev/null
+++ b/arch/x86/include/asm/msr_debug.h
@@ -0,0 +1,163 @@
+#ifndef _ASM_X86_MSR_DEBUG_H
+#define _ASM_X86_MSR_DEBUG_H
+
+/*
+ * Model Specific Registers (MSR) x86 architecture debug
+ *
+ * Copyright(C) 2009 Jaswinder Singh Rajput
+ */
+
+enum msr_debug_bit {
+ MSR_MC_BIT, /* Machine Check */
+ MSR_MONITOR_BIT, /* Monitor */
+ MSR_TIME_BIT, /* Time */
+ MSR_PMC_BIT, /* Performance Monitor */
+ MSR_PLATFORM_BIT, /* Platform */
+ MSR_APIC_BIT, /* APIC */
+ MSR_POWERON_BIT, /* Power-on */
+ MSR_CONTROL_BIT, /* Control */
+ MSR_FEATURES_BIT, /* Features control */
+ MSR_LBRANCH_BIT, /* Last Branch */
+ MSR_BIOS_BIT, /* BIOS */
+ MSR_FREQ_BIT, /* Frequency */
+ MSR_MTTR_BIT, /* MTRR */
+ MSR_PERF_BIT, /* Performance */
+ MSR_CACHE_BIT, /* Cache */
+ MSR_SYSENTER_BIT, /* Sysenter */
+ MSR_THERM_BIT, /* Thermal */
+ MSR_MISC_BIT, /* Miscellaneous */
+ MSR_DEBUG_BIT, /* Debug */
+ MSR_PAT_BIT, /* PAT */
+ MSR_VMX_BIT, /* VMX */
+ MSR_CALL_BIT, /* System Call */
+ MSR_BASE_BIT, /* BASE Address */
+ MSR_SMM_BIT, /* System mgmt mode */
+ MSR_SVM_BIT, /*Secure Virtual Machine*/
+ MSR_OSVM_BIT, /* OS-Visible Workaround*/
+ MSR_ALL_BIT, /* Select all MSRs */
+};
+
+#define MSR_ALL (~0) /* Select all MSRs */
+
+#define MSR_MC (1 << MSR_MC_BIT)
+#define MSR_MONITOR (1 << MSR_MONITOR_BIT)
+#define MSR_TIME (1 << MSR_TIME_BIT)
+#define MSR_PMC (1 << MSR_PMC_BIT)
+#define MSR_PLATFORM (1 << MSR_PLATFORM_BIT)
+#define MSR_APIC (1 << MSR_APIC_BIT)
+#define MSR_POWERON (1 << MSR_POWERON_BIT)
+#define MSR_CONTROL (1 << MSR_CONTROL_BIT)
+#define MSR_FEATURES (1 << MSR_FEATURES_BIT)
+#define MSR_LBRANCH (1 << MSR_LBRANCH_BIT)
+#define MSR_BIOS (1 << MSR_BIOS_BIT)
+#define MSR_FREQ (1 << MSR_FREQ_BIT)
+#define MSR_MTRR (1 << MSR_MTTR_BIT)
+#define MSR_PERF (1 << MSR_PERF_BIT)
+#define MSR_CACHE (1 << MSR_CACHE_BIT)
+#define MSR_SYSENTER (1 << MSR_SYSENTER_BIT)
+#define MSR_THERM (1 << MSR_THERM_BIT)
+#define MSR_MISC (1 << MSR_MISC_BIT)
+#define MSR_DEBUG (1 << MSR_DEBUG_BIT)
+#define MSR_PAT (1 << MSR_PAT_BIT)
+#define MSR_VMX (1 << MSR_VMX_BIT)
+#define MSR_CALL (1 << MSR_CALL_BIT)
+#define MSR_BASE (1 << MSR_BASE_BIT)
+#define MSR_SMM (1 << MSR_SMM_BIT)
+#define MSR_SVM (1 << MSR_SVM_BIT)
+#define MSR_OSVM (1 << MSR_OSVM_BIT)
+
+/*
+ * DisplayFamily_DisplayModel Processor Families/Processor Number Series
+ * -------------------------- ------------------------------------------
+ * 05_01, 05_02, 05_04 Pentium, Pentium with MMX
+ *
+ * 06_01 Pentium Pro
+ * 06_03, 06_05 Pentium II Xeon, Pentium II
+ * 06_07, 06_08, 06_0A, 06_0B Pentium III Xeon, Pentum III
+ *
+ * 06_09, 060D Pentium M
+ *
+ * 06_0E Core Duo, Core Solo
+ *
+ * 06_0F Xeon 3000, 3200, 5100, 5300, 7300 series,
+ * Core 2 Quad, Core 2 Extreme, Core 2 Duo,
+ * Pentium dual-core
+ * 06_17 Xeon 5200, 5400 series, Core 2 Quad Q9650
+ *
+ * 06_1C Atom
+ *
+ * 0F_00, 0F_01, 0F_02 Xeon, Xeon MP, Pentium 4
+ * 0F_03, 0F_04 Xeon, Xeon MP, Pentium 4, Pentium D
+ *
+ * 0F_06 Xeon 7100, 5000 Series, Xeon MP,
+ * Pentium 4, Pentium D
+ */
+
+/* MSR processors bits */
+enum msr_cpu_bit {
+/* Intel */
+ MSR_INTEL_PENTIUM_BIT,
+ MSR_INTEL_P6_BIT,
+ MSR_INTEL_PENTIUM_M_BIT,
+ MSR_INTEL_CORE_BIT,
+ MSR_INTEL_CORE2_BIT,
+ MSR_INTEL_ATOM_BIT,
+ MSR_INTEL_XEON_P4_BIT,
+ MSR_INTEL_XEON_MP_BIT,
+};
+
+#define MSR_CPU_ALL (~0) /* Select all CPUs */
+
+#define MSR_INTEL_PENTIUM (1 << MSR_INTEL_PENTIUM_BIT)
+#define MSR_INTEL_P6 (1 << MSR_INTEL_P6_BIT)
+#define MSR_INTEL_PENTIUM_M (1 << MSR_INTEL_PENTIUM_M_BIT)
+#define MSR_INTEL_CORE (1 << MSR_INTEL_CORE_BIT)
+#define MSR_INTEL_CORE2 (1 << MSR_INTEL_CORE2_BIT)
+#define MSR_INTEL_ATOM (1 << MSR_INTEL_ATOM_BIT)
+#define MSR_INTEL_XEON_P4 (1 << MSR_INTEL_XEON_P4_BIT)
+#define MSR_INTEL_XEON_MP (1 << MSR_INTEL_XEON_MP_BIT)
+
+#define MSR_INTEL_PX (MSR_INTEL_P6 | MSR_INTEL_PENTIUM_M)
+#define MSR_INTEL_COREX (MSR_INTEL_CORE | MSR_INTEL_CORE2)
+#define MSR_INTEL_XEON (MSR_INTEL_XEON_P4 | MSR_INTEL_XEON_MP)
+#define MSR_CO_AT (MSR_INTEL_CORE | MSR_INTEL_ATOM)
+#define MSR_C2_AT (MSR_INTEL_CORE2 | MSR_INTEL_ATOM)
+#define MSR_CX_AT (MSR_INTEL_COREX | MSR_INTEL_ATOM)
+#define MSR_CX_XE (MSR_INTEL_COREX | MSR_INTEL_XEON)
+#define MSR_P6_XE (MSR_INTEL_P6 | MSR_INTEL_XEON)
+#define MSR_PM_CO_AT (MSR_INTEL_PENTIUM_M | MSR_CO_AT)
+#define MSR_C2_AT_XE (MSR_C2_AT | MSR_INTEL_XEON)
+#define MSR_CX_AT_XE (MSR_CX_AT | MSR_INTEL_XEON)
+#define MSR_P6_CX_AT (MSR_INTEL_P6 | MSR_CX_AT)
+#define MSR_P6_CX_XE (MSR_P6_XE | MSR_INTEL_COREX)
+#define MSR_P6_CX_AT_XE (MSR_INTEL_P6 | MSR_CX_AT_XE)
+#define MSR_PM_CX_AT_XE (MSR_INTEL_PENTIUM_M | MSR_CX_AT_XE)
+#define MSR_PM_CX_AT (MSR_INTEL_PENTIUM_M | MSR_CX_AT)
+#define MSR_PM_CX_XE (MSR_INTEL_PENTIUM_M | MSR_CX_XE)
+#define MSR_PX_CX_AT (MSR_INTEL_PX | MSR_CX_AT)
+#define MSR_PX_CX_AT_XE (MSR_INTEL_PX | MSR_CX_AT_XE)
+
+/* Select all Intel CPUs*/
+#define MSR_INTEL_ALL (MSR_INTEL_PENTIUM | MSR_PX_CX_AT_XE)
+
+struct msr_debug_base {
+ char *name; /* MSR name */
+ unsigned flag; /* MSR flag */
+};
+
+struct msr_debug_range {
+ unsigned min; /* MSR range min */
+ unsigned max; /* MSR range max */
+ unsigned flag; /* Supported flags */
+ unsigned model; /* Supported models */
+};
+
+struct msr_private {
+ unsigned cpu;
+ unsigned msr;
+ unsigned count;
+};
+
+extern struct dentry *arch_cpu_debugfs_dir;
+
+#endif /* _ASM_X86_MSR_DEBUG_H */
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index c381330..6c9187a 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -9,7 +9,7 @@ endif
obj-y := intel_cacheinfo.o addon_cpuid_features.o
obj-y += proc.o capflags.o powerflags.o common.o
-obj-y += vmware.o hypervisor.o
+obj-y += vmware.o hypervisor.o msr_debug.o
obj-$(CONFIG_X86_32) += bugs.o cmpxchg.o
obj-$(CONFIG_X86_64) += bugs_64.o
diff --git a/arch/x86/kernel/cpu/msr_debug.c b/arch/x86/kernel/cpu/msr_debug.c
new file mode 100755
index 0000000..21808d0
--- /dev/null
+++ b/arch/x86/kernel/cpu/msr_debug.c
@@ -0,0 +1,461 @@
+/*
+ * Model Specific Registers (MSR) x86 architecture debug code
+ *
+ * Copyright(C) 2009 Jaswinder Singh Rajput
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <asm/msr_debug.h>
+
+static struct msr_debug_base msr_base[] = {
+ { "mc", MSR_MC }, /* Machine Check */
+ { "monitor", MSR_MONITOR }, /* Monitor */
+ { "time", MSR_TIME }, /* Time */
+ { "pmc", MSR_PMC }, /* Performance Monitor */
+ { "platform", MSR_PLATFORM }, /* Platform */
+ { "apic", MSR_APIC }, /* APIC */
+ { "poweron", MSR_POWERON }, /* Power-on */
+ { "control", MSR_CONTROL }, /* Control */
+ { "features", MSR_FEATURES }, /* Features control */
+ { "lastbranch", MSR_LBRANCH }, /* Last Branch */
+ { "bios", MSR_BIOS }, /* BIOS */
+ { "freq", MSR_FREQ }, /* Frequency */
+ { "mttr", MSR_MTRR }, /* MTRR */
+ { "perf", MSR_PERF }, /* Performance */
+ { "cache", MSR_CACHE }, /* Cache */
+ { "sysenter", MSR_SYSENTER }, /* Sysenter */
+ { "therm", MSR_THERM }, /* Thermal */
+ { "misc", MSR_MISC }, /* Miscellaneous */
+ { "debug", MSR_DEBUG }, /* Debug */
+ { "pat", MSR_PAT }, /* PAT */
+ { "vmx", MSR_VMX }, /* VMX */
+ { "call", MSR_CALL }, /* System Call */
+ { "base", MSR_BASE }, /* BASE Address */
+ { "smm", MSR_SMM }, /* System mgmt mode */
+ { "svm", MSR_SVM }, /*Secure Virtial Machine*/
+ { "osvm", MSR_OSVM }, /* OS-Visible Workaround*/
+ { "msr", MSR_ALL }, /* Select all MSRs */
+};
+
+static struct msr_debug_range msr_intel_range[] = {
+ { 0x00000000, 0x00000001, MSR_MC, MSR_INTEL_ALL },
+ { 0x00000006, 0x00000007, MSR_MONITOR, MSR_CX_AT_XE },
+ { 0x00000010, 0x00000010, MSR_TIME, MSR_INTEL_ALL },
+ { 0x00000011, 0x00000013, MSR_PMC, MSR_INTEL_PENTIUM },
+ { 0x00000017, 0x00000017, MSR_PLATFORM, MSR_PX_CX_AT_XE },
+ { 0x0000001B, 0x0000001B, MSR_APIC, MSR_P6_CX_AT_XE },
+
+ { 0x0000002A, 0x0000002A, MSR_POWERON, MSR_PX_CX_AT_XE },
+ { 0x0000002B, 0x0000002B, MSR_POWERON, MSR_INTEL_XEON },
+ { 0x0000002C, 0x0000002C, MSR_FREQ, MSR_INTEL_XEON },
+ { 0x0000003A, 0x0000003A, MSR_CONTROL, MSR_CX_AT_XE },
+
+ { 0x00000040, 0x00000043, MSR_LBRANCH, MSR_PM_CX_AT_XE },
+ { 0x00000044, 0x00000047, MSR_LBRANCH, MSR_PM_CO_AT },
+ { 0x00000060, 0x00000063, MSR_LBRANCH, MSR_C2_AT },
+ { 0x00000064, 0x00000067, MSR_LBRANCH, MSR_INTEL_ATOM },
+
+ { 0x00000079, 0x00000079, MSR_BIOS, MSR_P6_CX_AT_XE },
+ { 0x00000088, 0x0000008A, MSR_CACHE, MSR_INTEL_P6 },
+ { 0x0000008B, 0x0000008B, MSR_BIOS, MSR_P6_CX_AT_XE },
+ { 0x0000009B, 0x0000009B, MSR_MONITOR, MSR_INTEL_XEON },
+
+ { 0x000000C1, 0x000000C2, MSR_PMC, MSR_P6_CX_AT },
+ { 0x000000CD, 0x000000CD, MSR_FREQ, MSR_CX_AT },
+ { 0x000000E7, 0x000000E8, MSR_PERF, MSR_CX_AT },
+ { 0x000000FE, 0x000000FE, MSR_MTRR, MSR_P6_CX_XE },
+
+ { 0x00000116, 0x00000116, MSR_CACHE, MSR_INTEL_P6 },
+ { 0x00000118, 0x00000118, MSR_CACHE, MSR_INTEL_P6 },
+ { 0x00000119, 0x00000119, MSR_CACHE, MSR_INTEL_PX },
+ { 0x0000011A, 0x0000011B, MSR_CACHE, MSR_INTEL_P6 },
+ { 0x0000011E, 0x0000011E, MSR_CACHE, MSR_PX_CX_AT },
+
+ { 0x00000174, 0x00000176, MSR_SYSENTER, MSR_P6_CX_AT_XE },
+ { 0x00000179, 0x0000017A, MSR_MC, MSR_PX_CX_AT_XE },
+ { 0x0000017B, 0x0000017B, MSR_MC, MSR_P6_XE },
+ { 0x00000186, 0x00000187, MSR_PMC, MSR_P6_CX_AT },
+ { 0x00000198, 0x00000199, MSR_PERF, MSR_PM_CX_AT_XE },
+ { 0x0000019A, 0x0000019A, MSR_TIME, MSR_PM_CX_AT_XE },
+ { 0x0000019B, 0x0000019D, MSR_THERM, MSR_PM_CX_AT_XE },
+ { 0x000001A0, 0x000001A0, MSR_MISC, MSR_PM_CX_AT_XE },
+
+ { 0x000001C9, 0x000001C9, MSR_LBRANCH, MSR_PM_CX_AT },
+ { 0x000001D7, 0x000001D8, MSR_LBRANCH, MSR_INTEL_XEON },
+ { 0x000001D9, 0x000001D9, MSR_DEBUG, MSR_CX_AT_XE },
+ { 0x000001DA, 0x000001DA, MSR_LBRANCH, MSR_INTEL_XEON },
+ { 0x000001DB, 0x000001DB, MSR_LBRANCH, MSR_P6_XE },
+ { 0x000001DC, 0x000001DC, MSR_LBRANCH, MSR_INTEL_P6 },
+ { 0x000001DD, 0x000001DE, MSR_LBRANCH, MSR_PX_CX_AT_XE },
+ { 0x000001E0, 0x000001E0, MSR_LBRANCH, MSR_INTEL_P6 },
+
+ { 0x00000200, 0x0000020F, MSR_MTRR, MSR_P6_CX_XE },
+ { 0x00000250, 0x00000250, MSR_MTRR, MSR_P6_CX_XE },
+ { 0x00000258, 0x00000259, MSR_MTRR, MSR_P6_CX_XE },
+ { 0x00000268, 0x0000026F, MSR_MTRR, MSR_P6_CX_XE },
+ { 0x00000277, 0x00000277, MSR_PAT, MSR_C2_AT_XE },
+ { 0x000002FF, 0x000002FF, MSR_MTRR, MSR_P6_CX_XE },
+
+ { 0x00000300, 0x00000308, MSR_PMC, MSR_INTEL_XEON },
+ { 0x00000309, 0x0000030B, MSR_PMC, MSR_C2_AT_XE },
+ { 0x0000030C, 0x00000311, MSR_PMC, MSR_INTEL_XEON },
+ { 0x00000345, 0x00000345, MSR_PMC, MSR_C2_AT },
+ { 0x00000360, 0x00000371, MSR_PMC, MSR_INTEL_XEON },
+ { 0x0000038D, 0x00000390, MSR_PMC, MSR_C2_AT },
+ { 0x000003A0, 0x000003BE, MSR_PMC, MSR_INTEL_XEON },
+ { 0x000003C0, 0x000003CD, MSR_PMC, MSR_INTEL_XEON },
+ { 0x000003E0, 0x000003E1, MSR_PMC, MSR_INTEL_XEON },
+ { 0x000003F0, 0x000003F0, MSR_PMC, MSR_INTEL_XEON },
+ { 0x000003F1, 0x000003F1, MSR_PMC, MSR_C2_AT_XE },
+ { 0x000003F2, 0x000003F2, MSR_PMC, MSR_INTEL_XEON },
+
+ { 0x00000400, 0x00000402, MSR_MC, MSR_PM_CX_AT_XE },
+ { 0x00000403, 0x00000403, MSR_MC, MSR_INTEL_XEON },
+ { 0x00000404, 0x00000406, MSR_MC, MSR_PM_CX_AT_XE },
+ { 0x00000407, 0x00000407, MSR_MC, MSR_INTEL_XEON },
+ { 0x00000408, 0x0000040A, MSR_MC, MSR_PM_CX_AT_XE },
+ { 0x0000040B, 0x0000040B, MSR_MC, MSR_INTEL_XEON },
+ { 0x0000040C, 0x0000040E, MSR_MC, MSR_PM_CX_XE },
+ { 0x0000040F, 0x0000040F, MSR_MC, MSR_INTEL_XEON },
+ { 0x00000410, 0x00000412, MSR_MC, MSR_PM_CX_AT_XE },
+ { 0x00000413, 0x00000417, MSR_MC, MSR_CX_AT_XE },
+ { 0x00000480, 0x0000048B, MSR_VMX, MSR_CX_AT_XE },
+
+ { 0x00000600, 0x00000600, MSR_DEBUG, MSR_PM_CX_AT_XE },
+ { 0x00000680, 0x0000068F, MSR_LBRANCH, MSR_INTEL_XEON },
+ { 0x000006C0, 0x000006CF, MSR_LBRANCH, MSR_INTEL_XEON },
+
+ { 0x000107CC, 0x000107D3, MSR_PMC, MSR_INTEL_XEON_MP },
+
+ { 0xC0000080, 0xC0000080, MSR_FEATURES, MSR_INTEL_XEON },
+ { 0xC0000081, 0xC0000082, MSR_CALL, MSR_INTEL_XEON },
+ { 0xC0000084, 0xC0000084, MSR_CALL, MSR_INTEL_XEON },
+ { 0xC0000100, 0xC0000102, MSR_BASE, MSR_INTEL_XEON },
+};
+
+/* AMD MSRs Range */
+static struct msr_debug_range msr_amd_range[] = {
+ { 0x00000010, 0x00000010, MSR_TIME, MSR_CPU_ALL, },
+ { 0x0000001B, 0x0000001B, MSR_APIC, MSR_CPU_ALL, },
+ { 0x000000FE, 0x000000FE, MSR_MTRR, MSR_CPU_ALL, },
+
+ { 0x00000174, 0x00000176, MSR_SYSENTER, MSR_CPU_ALL, },
+ { 0x00000179, 0x0000017A, MSR_MC, MSR_CPU_ALL, },
+ { 0x0000017B, 0x0000017B, MSR_MC, MSR_CPU_ALL, },
+ { 0x000001D9, 0x000001D9, MSR_DEBUG, MSR_CPU_ALL, },
+ { 0x000001DB, 0x000001DE, MSR_LBRANCH, MSR_CPU_ALL, },
+
+ { 0x00000200, 0x0000020F, MSR_MTRR, MSR_CPU_ALL, },
+ { 0x00000250, 0x00000250, MSR_MTRR, MSR_CPU_ALL, },
+ { 0x00000258, 0x00000259, MSR_MTRR, MSR_CPU_ALL, },
+ { 0x00000268, 0x0000026F, MSR_MTRR, MSR_CPU_ALL, },
+ { 0x00000277, 0x00000277, MSR_PAT, MSR_CPU_ALL, },
+ { 0x000002FF, 0x000002FF, MSR_MTRR, MSR_CPU_ALL, },
+
+ { 0x00000400, 0x00000417, MSR_MC, MSR_CPU_ALL, },
+
+ { 0xC0000080, 0xC0000080, MSR_FEATURES, MSR_INTEL_XEON },
+ { 0xC0000081, 0xC0000084, MSR_CALL, MSR_INTEL_XEON },
+ { 0xC0000100, 0xC0000102, MSR_BASE, MSR_INTEL_XEON },
+ { 0xC0000103, 0xC0000103, MSR_TIME, MSR_INTEL_XEON },
+
+ { 0xC0000408, 0xC000040A, MSR_MC, MSR_CPU_ALL, },
+
+ { 0xc0010000, 0xc0010007, MSR_PMC, MSR_CPU_ALL },
+ { 0xc0010010, 0xc0010010, MSR_MTRR, MSR_CPU_ALL },
+ { 0xc0010016, 0xc001001A, MSR_MTRR, MSR_CPU_ALL },
+ { 0xc001001D, 0xc001001D, MSR_MTRR, MSR_CPU_ALL },
+ { 0xc0010030, 0xc0010035, MSR_BIOS, MSR_CPU_ALL },
+ { 0xc0010056, 0xc0010056, MSR_SMM, MSR_CPU_ALL },
+ { 0xc0010061, 0xc0010063, MSR_SMM, MSR_CPU_ALL },
+ { 0xc0010074, 0xc0010074, MSR_MC, MSR_CPU_ALL },
+ { 0xc0010111, 0xc0010113, MSR_SMM, MSR_CPU_ALL },
+ { 0xc0010114, 0xc0010118, MSR_SVM, MSR_CPU_ALL },
+ { 0xc0010119, 0xc001011A, MSR_SMM, MSR_CPU_ALL },
+ { 0xc0010140, 0xc0010141, MSR_OSVM, MSR_CPU_ALL },
+ { 0xc0010156, 0xc0010156, MSR_SMM, MSR_CPU_ALL },
+};
+
+static DEFINE_MUTEX(msr_debug_lock);
+
+static int get_msr_intel_bit(unsigned model)
+{
+ int ret = 0;
+
+ switch (model) {
+ case 0x0501:
+ case 0x0502:
+ case 0x0504:
+ ret = MSR_INTEL_PENTIUM;
+ break;
+ case 0x0601:
+ case 0x0603:
+ case 0x0605:
+ case 0x0607:
+ case 0x0608:
+ case 0x060A:
+ case 0x060B:
+ ret = MSR_INTEL_P6;
+ break;
+ case 0x0609:
+ case 0x060D:
+ ret = MSR_INTEL_PENTIUM_M;
+ break;
+ case 0x060E:
+ ret = MSR_INTEL_CORE;
+ break;
+ case 0x060F:
+ case 0x0617:
+ ret = MSR_INTEL_CORE2;
+ break;
+ case 0x061C:
+ ret = MSR_INTEL_ATOM;
+ break;
+ case 0x0F00:
+ case 0x0F01:
+ case 0x0F02:
+ case 0x0F03:
+ case 0x0F04:
+ ret = MSR_INTEL_XEON_P4;
+ break;
+ case 0x0F06:
+ ret = MSR_INTEL_XEON_MP;
+ break;
+ }
+
+ return ret;
+}
+
+static int get_msr_cpu_bit(unsigned model)
+{
+ unsigned vendor;
+
+ vendor = model >> 16;
+ if (vendor == X86_VENDOR_INTEL)
+ return get_msr_intel_bit(model & 0xffff);
+ else
+ return 0;
+}
+
+static unsigned get_msr_range(unsigned *min, unsigned *max, int index,
+ unsigned flag, unsigned model)
+{
+ unsigned vendor, cpu_bit;
+
+ vendor = model >> 16;
+ cpu_bit = get_msr_cpu_bit(model);
+ *max = 0;
+ if (vendor == X86_VENDOR_INTEL) {
+ if ((msr_intel_range[index].model & cpu_bit) &&
+ (msr_intel_range[index].flag & flag)) {
+ *min = msr_intel_range[index].min;
+ *max = msr_intel_range[index].max;
+ }
+ } else if (vendor == X86_VENDOR_AMD) {
+ if (msr_amd_range[index].flag & flag) {
+ *min = msr_amd_range[index].min;
+ *max = msr_amd_range[index].max;
+ }
+ }
+
+ return *max;
+}
+
+static int get_msr_range_count(unsigned flag, unsigned model)
+{
+ int index = 0;
+
+ model >>= 16;
+ if (model == X86_VENDOR_INTEL)
+ index = ARRAY_SIZE(msr_intel_range);
+ else if (model == X86_VENDOR_AMD)
+ index = ARRAY_SIZE(msr_amd_range);
+
+ return index;
+}
+
+static void print_intel_msr(struct seq_file *seq, unsigned int cpu,
+ unsigned flag, unsigned model)
+{
+ int i, range;
+ u32 low, high;
+ unsigned msr, msr_min, msr_max;
+
+ range = get_msr_range_count(flag, model);
+
+ for (i = 0; i < range; i++) {
+ if (!get_msr_range(&msr_min, &msr_max, i, flag, model))
+ continue;
+ for (msr = msr_min; msr <= msr_max; msr++) {
+ if (rdmsr_safe_on_cpu(cpu, msr, &low, &high))
+ continue;
+ if (seq)
+ seq_printf(seq, " MSR_%08x: %08x_%08x\n",
+ msr, high, low);
+ else
+ printk(KERN_INFO " MSR_%08x: %08x_%08x\n",
+ msr, high, low);
+ }
+ }
+}
+
+static void print_amd_msr(struct seq_file *seq, unsigned flag, unsigned model)
+{
+ int i, range;
+ u64 val;
+ unsigned msr, msr_min, msr_max;
+
+ range = get_msr_range_count(flag, model);
+
+ for (i = 0; i < range; i++) {
+ if (!get_msr_range(&msr_min, &msr_max, i, flag, model))
+ continue;
+ for (msr = msr_min; msr <= msr_max; msr++) {
+ if (rdmsrl_amd_safe(msr, &val))
+ continue;
+ if (seq)
+ seq_printf(seq, " MSR_%08x: %016llx\n",
+ msr, val);
+ else
+ printk(KERN_INFO " MSR_%08x: %016llx\n",
+ msr, val);
+ }
+ }
+}
+
+static int msr_seq_show(struct seq_file *seq, void *v)
+{
+ unsigned model, flag;
+ struct cpuinfo_x86 *cpu = &cpu_data(0);
+ struct msr_private *priv = seq->private;
+
+#ifdef CONFIG_SMP
+ /* We are only interested for core_id 0 */
+ if (cpu->cpu_core_id || cpu->apicid)
+ return 0;
+#endif
+ model = ((cpu->x86_vendor << 16) | (cpu->x86 << 8) | (cpu->x86_model));
+ flag = msr_base[priv->msr].flag;
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ print_intel_msr(seq, cpu->phys_proc_id, flag, model);
+ else
+ print_amd_msr(seq, flag, model);
+
+ seq_printf(seq, "\n");
+
+ return 0;
+}
+
+static void *msr_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct cpuinfo_x86 *c = NULL;
+
+ if (*pos == 0) /* just in case, cpu 0 is not the first */
+ c = &cpu_data(*pos);
+
+ return c;
+}
+
+static void *msr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ (*pos)++;
+
+ return msr_seq_start(seq, pos);
+}
+
+static void msr_seq_stop(struct seq_file *seq, void *v)
+{
+}
+
+static const struct seq_operations msr_seq_ops = {
+ .start = msr_seq_start,
+ .next = msr_seq_next,
+ .stop = msr_seq_stop,
+ .show = msr_seq_show,
+};
+
+static int msr_seq_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ struct msr_private *priv;
+ int err, private = inode->i_private;
+
+ err = seq_open(file, &msr_seq_ops);
+ mutex_lock(&msr_debug_lock);
+ if (!err) {
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (priv) {
+ seq = file->private_data;
+ priv->cpu = (private & 0xFF);
+ private >>= 8;
+ priv->msr = (private & 0xFF);
+ private >>= 8;
+ priv->count = (private & 0xFF);
+ seq->private = priv;
+ } else
+ err = -ENOMEM;
+
+ }
+ mutex_unlock(&msr_debug_lock);
+
+ return err;
+}
+
+static int msr_seq_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = (struct seq_file *)file->private_data;
+ struct msr_private *priv = seq->private;
+
+ seq_release(inode, file);
+ kfree(priv);
+
+ return 0;
+}
+
+static const struct file_operations msr_fops = {
+ .open = msr_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = msr_seq_release,
+};
+
+static struct dentry *msr_debugfs_dir;
+
+static int __init msr_debug_init(void)
+{
+ int i;
+ unsigned priv_data;
+ struct dentry *msr_dentry;
+ struct cpuinfo_x86 *cpu = &cpu_data(0);
+
+ if (!cpu_has(cpu, X86_FEATURE_MSR))
+ return -ENODEV;
+
+ msr_debugfs_dir = debugfs_create_dir("msr", arch_cpu_debugfs_dir);
+ msr_dentry = debugfs_create_dir("cpu0", msr_debugfs_dir);
+
+ for (i = 0; i < ARRAY_SIZE(msr_base); i++) {
+ priv_data = i << 8;
+ debugfs_create_file(msr_base[i].name, S_IRUGO, msr_dentry,
+ (void *)priv_data, &msr_fops);
+ }
+ return 0;
+}
+
+static void __exit msr_debug_exit(void)
+{
+ if (msr_debugfs_dir)
+ debugfs_remove_recursive(msr_debugfs_dir);
+}
+
+module_init(msr_debug_init);
+module_exit(msr_debug_exit);
+
+MODULE_AUTHOR("Jaswinder Singh Rajput");
+MODULE_DESCRIPTION("MSR debug module");
+MODULE_LICENSE("GPL");
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index ff7d3b0..2fa3b08 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -19,6 +19,9 @@
struct dentry *arch_debugfs_dir;
EXPORT_SYMBOL(arch_debugfs_dir);
+struct dentry *arch_cpu_debugfs_dir;
+EXPORT_SYMBOL(arch_cpu_debugfs_dir);
+
#ifdef CONFIG_DEBUG_BOOT_PARAMS
struct setup_data_node {
u64 paddr;
@@ -218,6 +221,10 @@ static int __init arch_kdebugfs_init(void)
if (!arch_debugfs_dir)
return -ENOMEM;
+ arch_cpu_debugfs_dir = debugfs_create_dir("cpu", arch_debugfs_dir);
+ if (!arch_cpu_debugfs_dir)
+ return -ENOMEM;
+
#ifdef CONFIG_DEBUG_BOOT_PARAMS
error = boot_params_kdebugfs_init();
#endif
--
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