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author | Thomas Gleixner <tglx@linutronix.de> | 2009-08-20 15:06:25 (GMT) |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2009-08-31 07:35:47 (GMT) |
commit | 2d826404f0bdcac2a4dd7e3c446b70d6a3b63b78 (patch) | |
tree | 7db2dc0fbde3a25a89f1fc1514152567f612ccde /arch/x86/kernel | |
parent | 47926214d8b2bef13b2be57c500194a804f16198 (diff) | |
download | linux-fsl-qoriq-2d826404f0bdcac2a4dd7e3c446b70d6a3b63b78.tar.xz |
x86: Move tsc_calibration to x86_init_ops
TSC calibration is modified by the vmware hypervisor and paravirt by
separate means. Moorestown wants to add its own calibration routine as
well. So make calibrate_tsc a proper x86_init_ops function and
override it by paravirt or by the early setup of the vmware
hypervisor.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r-- | arch/x86/kernel/cpu/hypervisor.c | 14 | ||||
-rw-r--r-- | arch/x86/kernel/cpu/vmware.c | 21 | ||||
-rw-r--r-- | arch/x86/kernel/kvmclock.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/paravirt.c | 1 | ||||
-rw-r--r-- | arch/x86/kernel/setup.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/tsc.c | 13 | ||||
-rw-r--r-- | arch/x86/kernel/vmi_32.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/vmiclock_32.c | 2 | ||||
-rw-r--r-- | arch/x86/kernel/x86_init.c | 5 |
9 files changed, 32 insertions, 30 deletions
diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c index 93ba8ee..08be922 100644 --- a/arch/x86/kernel/cpu/hypervisor.c +++ b/arch/x86/kernel/cpu/hypervisor.c @@ -34,13 +34,6 @@ detect_hypervisor_vendor(struct cpuinfo_x86 *c) c->x86_hyper_vendor = X86_HYPER_VENDOR_NONE; } -unsigned long get_hypervisor_tsc_freq(void) -{ - if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE) - return vmware_get_tsc_khz(); - return 0; -} - static inline void __cpuinit hypervisor_set_feature_bits(struct cpuinfo_x86 *c) { @@ -55,3 +48,10 @@ void __cpuinit init_hypervisor(struct cpuinfo_x86 *c) detect_hypervisor_vendor(c); hypervisor_set_feature_bits(c); } + +void __init init_hypervisor_platform(void) +{ + init_hypervisor(&boot_cpu_data); + if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE) + vmware_platform_setup(); +} diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index bc24f51..0a46b4d 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -24,6 +24,7 @@ #include <linux/dmi.h> #include <asm/div64.h> #include <asm/vmware.h> +#include <asm/x86_init.h> #define CPUID_VMWARE_INFO_LEAF 0x40000000 #define VMWARE_HYPERVISOR_MAGIC 0x564D5868 @@ -47,21 +48,29 @@ static inline int __vmware_platform(void) return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC; } -static unsigned long __vmware_get_tsc_khz(void) +static unsigned long vmware_get_tsc_khz(void) { uint64_t tsc_hz; uint32_t eax, ebx, ecx, edx; VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); - if (ebx == UINT_MAX) - return 0; tsc_hz = eax | (((uint64_t)ebx) << 32); do_div(tsc_hz, 1000); BUG_ON(tsc_hz >> 32); return tsc_hz; } +void __init vmware_platform_setup(void) +{ + uint32_t eax, ebx, ecx, edx; + + VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); + + if (ebx != UINT_MAX) + x86_platform.calibrate_tsc = vmware_get_tsc_khz; +} + /* * While checking the dmi string infomation, just checking the product * serial key should be enough, as this will always have a VMware @@ -87,12 +96,6 @@ int vmware_platform(void) return 0; } -unsigned long vmware_get_tsc_khz(void) -{ - BUG_ON(!vmware_platform()); - return __vmware_get_tsc_khz(); -} - /* * VMware hypervisor takes care of exporting a reliable TSC to the guest. * Still, due to timing difference when running on virtual cpus, the TSC can diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index 64e9b5f..75a21b6 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -187,7 +187,7 @@ void __init kvmclock_init(void) pv_time_ops.get_wallclock = kvm_get_wallclock; pv_time_ops.set_wallclock = kvm_set_wallclock; pv_time_ops.sched_clock = kvm_clock_read; - pv_time_ops.get_tsc_khz = kvm_get_tsc_khz; + x86_platform.calibrate_tsc = kvm_get_tsc_khz; #ifdef CONFIG_X86_LOCAL_APIC x86_cpuinit.setup_percpu_clockev = kvm_setup_secondary_clock; diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 9c0e644..7cbf898 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -309,7 +309,6 @@ struct pv_time_ops pv_time_ops = { .get_wallclock = native_get_wallclock, .set_wallclock = native_set_wallclock, .sched_clock = native_sched_clock, - .get_tsc_khz = native_calibrate_tsc, }; struct pv_irq_ops pv_irq_ops = { diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index bb207a4..2d93026 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -818,7 +818,7 @@ void __init setup_arch(char **cmdline_p) * VMware detection requires dmi to be available, so this * needs to be done after dmi_scan_machine, for the BP. */ - init_hypervisor(&boot_cpu_data); + init_hypervisor_platform(); x86_init.resources.probe_roms(); diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 97a0bcb..9917632 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -18,6 +18,7 @@ #include <asm/delay.h> #include <asm/hypervisor.h> #include <asm/nmi.h> +#include <asm/x86_init.h> unsigned int __read_mostly cpu_khz; /* TSC clocks / usec, not used here */ EXPORT_SYMBOL(cpu_khz); @@ -401,15 +402,9 @@ unsigned long native_calibrate_tsc(void) { u64 tsc1, tsc2, delta, ref1, ref2; unsigned long tsc_pit_min = ULONG_MAX, tsc_ref_min = ULONG_MAX; - unsigned long flags, latch, ms, fast_calibrate, hv_tsc_khz; + unsigned long flags, latch, ms, fast_calibrate; int hpet = is_hpet_enabled(), i, loopmin; - hv_tsc_khz = get_hypervisor_tsc_freq(); - if (hv_tsc_khz) { - printk(KERN_INFO "TSC: Frequency read from the hypervisor\n"); - return hv_tsc_khz; - } - local_irq_save(flags); fast_calibrate = quick_pit_calibrate(); local_irq_restore(flags); @@ -567,7 +562,7 @@ int recalibrate_cpu_khz(void) unsigned long cpu_khz_old = cpu_khz; if (cpu_has_tsc) { - tsc_khz = calibrate_tsc(); + tsc_khz = x86_platform.calibrate_tsc(); cpu_khz = tsc_khz; cpu_data(0).loops_per_jiffy = cpufreq_scale(cpu_data(0).loops_per_jiffy, @@ -917,7 +912,7 @@ void __init tsc_init(void) if (!cpu_has_tsc) return; - tsc_khz = calibrate_tsc(); + tsc_khz = x86_platform.calibrate_tsc(); cpu_khz = tsc_khz; if (!tsc_khz) { diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c index cd7d0fb..052ae81 100644 --- a/arch/x86/kernel/vmi_32.c +++ b/arch/x86/kernel/vmi_32.c @@ -825,7 +825,7 @@ static inline int __init activate_vmi(void) x86_cpuinit.setup_percpu_clockev = vmi_time_ap_init; #endif pv_time_ops.sched_clock = vmi_sched_clock; - pv_time_ops.get_tsc_khz = vmi_tsc_khz; + x86_platform.calibrate_tsc = vmi_tsc_khz; /* We have true wallclock functions; disable CMOS clock sync */ no_sync_cmos_clock = 1; diff --git a/arch/x86/kernel/vmiclock_32.c b/arch/x86/kernel/vmiclock_32.c index 2b3eb82..611b9e2 100644 --- a/arch/x86/kernel/vmiclock_32.c +++ b/arch/x86/kernel/vmiclock_32.c @@ -68,7 +68,7 @@ unsigned long long vmi_sched_clock(void) return cycles_2_ns(vmi_timer_ops.get_cycle_counter(VMI_CYCLES_AVAILABLE)); } -/* paravirt_ops.get_tsc_khz = vmi_tsc_khz */ +/* x86_platform.calibrate_tsc = vmi_tsc_khz */ unsigned long vmi_tsc_khz(void) { unsigned long long khz; diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index 4790b92..13081b9 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -13,6 +13,7 @@ #include <asm/e820.h> #include <asm/time.h> #include <asm/irq.h> +#include <asm/tsc.h> void __cpuinit x86_init_noop(void) { } void __init x86_init_uint_noop(unsigned int unused) { } @@ -67,3 +68,7 @@ struct __initdata x86_init_ops x86_init = { __cpuinitdata struct x86_cpuinit_ops x86_cpuinit = { .setup_percpu_clockev = setup_secondary_APIC_clock, }; + +struct x86_platform_ops x86_platform = { + .calibrate_tsc = native_calibrate_tsc, +}; |