x86: Move get/set_wallclock to x86_platform_ops

get/set_wallclock() have already a set of platform dependent
implementations (default, EFI, paravirt). MRST will add another
variant.

Moving them to platform ops simplifies the existing code and minimizes
the effort to integrate new variants.

Signed-off-by: Feng Tang <feng.tang@intel.com>
LKML-Reference: <new-submission>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 files changed, 21 insertions, 83 deletions

diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 1e458a553303..a69ae87bd7d8 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -24,16 +24,6 @@ static inline void load_sp0(struct tss_struct *tss,
         PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
 }
 
-static inline unsigned long get_wallclock(void)
-{
-        return PVOP_CALL0(unsigned long, pv_time_ops.get_wallclock);
-}
-
-static inline int set_wallclock(unsigned long nowtime)
-{
-        return PVOP_CALL1(int, pv_time_ops.set_wallclock, nowtime);
-}
-
 /* The paravirtualized CPUID instruction. */
 static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
                            unsigned int *ecx, unsigned int *edx)
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 0d812e592e3b..c25d5e3bdf9c 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -88,10 +88,6 @@ struct pv_lazy_ops {
 };
 
 struct pv_time_ops {
-        /* Set and set time of day */
-        unsigned long (*get_wallclock)(void);
-        int (*set_wallclock)(unsigned long);
-
         unsigned long long (*sched_clock)(void);
         unsigned long (*get_tsc_khz)(void);
 };
diff --git a/arch/x86/include/asm/time.h b/arch/x86/include/asm/time.h
index 9c5608b21c27..7bdec4e9b739 100644
--- a/arch/x86/include/asm/time.h
+++ b/arch/x86/include/asm/time.h
@@ -4,57 +4,7 @@
 extern void hpet_time_init(void);
 
 #include <asm/mc146818rtc.h>
-#ifdef CONFIG_X86_32
-#include <linux/efi.h>
-
-static inline unsigned long native_get_wallclock(void)
-{
-        unsigned long retval;
-
-        if (efi_enabled)
-                retval = efi_get_time();
-        else
-                retval = mach_get_cmos_time();
-
-        return retval;
-}
-
-static inline int native_set_wallclock(unsigned long nowtime)
-{
-        int retval;
-
-        if (efi_enabled)
-                retval = efi_set_rtc_mmss(nowtime);
-        else
-                retval = mach_set_rtc_mmss(nowtime);
-
-        return retval;
-}
-
-#else
-extern void native_time_init_hook(void);
-
-static inline unsigned long native_get_wallclock(void)
-{
-        return mach_get_cmos_time();
-}
-
-static inline int native_set_wallclock(unsigned long nowtime)
-{
-        return mach_set_rtc_mmss(nowtime);
-}
-
-#endif
 
 extern void time_init(void);
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else /* !CONFIG_PARAVIRT */
-
-#define get_wallclock() native_get_wallclock()
-#define set_wallclock(x) native_set_wallclock(x)
-
-#endif /* CONFIG_PARAVIRT */
-
 #endif /* _ASM_X86_TIME_H */
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index b6c89428137d..2c756fd4ab0e 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -114,9 +114,13 @@ struct x86_cpuinit_ops {
 /**
  * struct x86_platform_ops - platform specific runtime functions
  * @calibrate_tsc:              calibrate TSC
+ * @get_wallclock:              get time from HW clock like RTC etc.
+ * @set_wallclock:              set time back to HW clock
  */
 struct x86_platform_ops {
         unsigned long (*calibrate_tsc)(void);
+        unsigned long (*get_wallclock)(void);
+        int (*set_wallclock)(unsigned long nowtime);
 };
 
 extern struct x86_init_ops x86_init;
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index fe26ba3e3451..ad5bd988fb79 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -42,6 +42,7 @@
 #include <asm/time.h>
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
+#include <asm/x86_init.h>
 
 #define EFI_DEBUG       1
 #define PFX             "EFI: "
@@ -453,6 +454,9 @@ void __init efi_init(void)
         if (add_efi_memmap)
                 do_add_efi_memmap();
 
+        x86_platform.get_wallclock = efi_get_time;
+        x86_platform.set_wallclock = efi_set_rtc_mmss;
+
         /* Setup for EFI runtime service */
         reboot_type = BOOT_EFI;
 
diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index 75a21b61b863..59ab94db12ea 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -184,10 +184,10 @@ void __init kvmclock_init(void)
         if (kvmclock && kvm_para_has_feature(KVM_FEATURE_CLOCKSOURCE)) {
                 if (kvm_register_clock("boot clock"))
                         return;
-                pv_time_ops.get_wallclock = kvm_get_wallclock;
-                pv_time_ops.set_wallclock = kvm_set_wallclock;
                 pv_time_ops.sched_clock = kvm_clock_read;
                 x86_platform.calibrate_tsc = kvm_get_tsc_khz;
+                x86_platform.get_wallclock = kvm_get_wallclock;
+                x86_platform.set_wallclock = kvm_set_wallclock;
 #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 7cbf898d839b..c0fb85aed432 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -306,8 +306,6 @@ struct pv_init_ops pv_init_ops = {
 };
 
 struct pv_time_ops pv_time_ops = {
-        .get_wallclock = native_get_wallclock,
-        .set_wallclock = native_set_wallclock,
         .sched_clock = native_sched_clock,
 };
 
diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index 5d465b207e72..b8652f2e6855 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -8,6 +8,7 @@
 #include <linux/pnp.h>
 
 #include <asm/vsyscall.h>
+#include <asm/x86_init.h>
 #include <asm/time.h>
 
 #ifdef CONFIG_X86_32
@@ -165,13 +166,13 @@ void rtc_cmos_write(unsigned char val, unsigned char addr)
 }
 EXPORT_SYMBOL(rtc_cmos_write);
 
-static int set_rtc_mmss(unsigned long nowtime)
+int update_persistent_clock(struct timespec now)
 {
         unsigned long flags;
         int retval;
 
         spin_lock_irqsave(&rtc_lock, flags);
-        retval = set_wallclock(nowtime);
+        retval = x86_platform.set_wallclock(now.tv_sec);
         spin_unlock_irqrestore(&rtc_lock, flags);
 
         return retval;
@@ -183,17 +184,12 @@ unsigned long read_persistent_clock(void)
         unsigned long retval, flags;
 
         spin_lock_irqsave(&rtc_lock, flags);
-        retval = get_wallclock();
+        retval = x86_platform.get_wallclock();
         spin_unlock_irqrestore(&rtc_lock, flags);
 
         return retval;
 }
 
-int update_persistent_clock(struct timespec now)
-{
-        return set_rtc_mmss(now.tv_sec);
-}
-
 unsigned long long native_read_tsc(void)
 {
         return __native_read_tsc();
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 052ae81ee08b..31e6f6cfe53e 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -818,14 +818,14 @@ static inline int __init activate_vmi(void)
                 vmi_timer_ops.cancel_alarm =
                          vmi_get_function(VMI_CALL_CancelAlarm);
                 x86_init.timers.timer_init = vmi_time_init;
-                pv_time_ops.get_wallclock = vmi_get_wallclock;
-                pv_time_ops.set_wallclock = vmi_set_wallclock;
 #ifdef CONFIG_X86_LOCAL_APIC
                 x86_init.timers.setup_percpu_clockev = vmi_time_bsp_init;
                 x86_cpuinit.setup_percpu_clockev = vmi_time_ap_init;
 #endif
                 pv_time_ops.sched_clock = vmi_sched_clock;
                 x86_platform.calibrate_tsc = vmi_tsc_khz;
+                x86_platform.get_wallclock = vmi_get_wallclock;
+                x86_platform.set_wallclock = vmi_set_wallclock;
 
                 /* We have true wallclock functions; disable CMOS clock sync */
                 no_sync_cmos_clock = 1;
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 68824c7be4e2..4449a4a2c2ed 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -70,4 +70,6 @@ struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = {
 
 struct x86_platform_ops x86_platform = {
         .calibrate_tsc                  = native_calibrate_tsc,
+        .get_wallclock                  = mach_get_cmos_time,
+        .set_wallclock                  = mach_set_rtc_mmss,
 };
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index fabe745513d9..4cb7d5d18b8e 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -1318,13 +1318,11 @@ __init void lguest_init(void)
         set_lguest_basic_apic_ops();
 #endif
 
-        /* Time operations */
-        pv_time_ops.get_wallclock = lguest_get_wallclock;
-
         x86_init.resources.memory_setup = lguest_memory_setup;
         x86_init.irqs.intr_init = lguest_init_IRQ;
         x86_init.timers.timer_init = lguest_time_init;
         x86_platform.calibrate_tsc = lguest_tsc_khz;
+        x86_platform.get_wallclock =  lguest_get_wallclock;
 
         /*
          * Now is a good time to look at the implementations of these functions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index ee8cac77c8a4..b5bf8b9119a3 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -842,8 +842,6 @@ static const struct pv_init_ops xen_init_ops __initdata = {
 };
 
 static const struct pv_time_ops xen_time_ops __initdata = {
-        .set_wallclock = xen_set_wallclock,
-        .get_wallclock = xen_get_wallclock,
         .sched_clock = xen_sched_clock,
 };
 
@@ -980,6 +978,8 @@ asmlinkage void __init xen_start_kernel(void)
         x86_cpuinit.setup_percpu_clockev = x86_init_noop;
 
         x86_platform.calibrate_tsc = xen_tsc_khz;
+        x86_platform.get_wallclock = xen_get_wallclock;
+        x86_platform.set_wallclock = xen_set_wallclock;
 
 #ifdef CONFIG_X86_64
         /*