diff options
| author | Andi Kleen <ak@suse.de> | 2007-07-04 03:38:13 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-04 05:11:35 +0400 |
| commit | 5dcccd8d7eae870d85c3f175fd0823d3da07d0e3 (patch) | |
| tree | 87bf8efa01f2a668e01f48157f59ca42fe7be5d5 /arch/i386 | |
| parent | 0f8dc2f06560e2ca126d1670a24126ba08357d38 (diff) | |
| download | linux-5dcccd8d7eae870d85c3f175fd0823d3da07d0e3.tar.xz | |
Revert perfctr reservation to 2.6.21 state
With this change it works again when the nmi watchdog is disabled.
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Björn Steinbrink <B.Steinbrink@gmx.de>
Cc: Stephane Eranian <eranian@hpl.hp.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/cpu/perfctr-watchdog.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/arch/i386/kernel/cpu/perfctr-watchdog.c b/arch/i386/kernel/cpu/perfctr-watchdog.c index f0b67630b90d..4d26d514c56f 100644 --- a/arch/i386/kernel/cpu/perfctr-watchdog.c +++ b/arch/i386/kernel/cpu/perfctr-watchdog.c @@ -55,14 +55,45 @@ static DEFINE_PER_CPU(struct nmi_watchdog_ctlblk, nmi_watchdog_ctlblk); /* converts an msr to an appropriate reservation bit */ static inline unsigned int nmi_perfctr_msr_to_bit(unsigned int msr) { - return wd_ops ? msr - wd_ops->perfctr : 0; + /* returns the bit offset of the performance counter register */ + switch (boot_cpu_data.x86_vendor) { + case X86_VENDOR_AMD: + return (msr - MSR_K7_PERFCTR0); + case X86_VENDOR_INTEL: + if (cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) + return (msr - MSR_ARCH_PERFMON_PERFCTR0); + + switch (boot_cpu_data.x86) { + case 6: + return (msr - MSR_P6_PERFCTR0); + case 15: + return (msr - MSR_P4_BPU_PERFCTR0); + } + } + return 0; } /* converts an msr to an appropriate reservation bit */ /* returns the bit offset of the event selection register */ static inline unsigned int nmi_evntsel_msr_to_bit(unsigned int msr) { - return wd_ops ? msr - wd_ops->evntsel : 0; + /* returns the bit offset of the event selection register */ + switch (boot_cpu_data.x86_vendor) { + case X86_VENDOR_AMD: + return (msr - MSR_K7_EVNTSEL0); + case X86_VENDOR_INTEL: + if (cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) + return (msr - MSR_ARCH_PERFMON_EVENTSEL0); + + switch (boot_cpu_data.x86) { + case 6: + return (msr - MSR_P6_EVNTSEL0); + case 15: + return (msr - MSR_P4_BSU_ESCR0); + } + } + return 0; + } /* checks for a bit availability (hack for oprofile) */ |