diff options
Diffstat (limited to 'arch/i386/kernel/vmi.c')
| -rw-r--r-- | arch/i386/kernel/vmi.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/i386/kernel/vmi.c b/arch/i386/kernel/vmi.c index a94d64b10f7..bb5a7abf949 100644 --- a/arch/i386/kernel/vmi.c +++ b/arch/i386/kernel/vmi.c @@ -34,6 +34,7 @@ #include <asm/apic.h> #include <asm/processor.h> #include <asm/timer.h> +#include <asm/vmi_time.h> /* Convenient for calling VMI functions indirectly in the ROM */ typedef u32 __attribute__((regparm(1))) (VROMFUNC)(void); @@ -67,6 +68,7 @@ struct { void (*set_linear_mapping)(int, u32, u32, u32); void (*flush_tlb)(int); void (*set_initial_ap_state)(int, int); + void (*halt)(void); } vmi_ops; /* XXX move this to alternative.h */ @@ -252,6 +254,19 @@ static void vmi_nop(void) { } +/* For NO_IDLE_HZ, we stop the clock when halting the kernel */ +#ifdef CONFIG_NO_IDLE_HZ +static fastcall void vmi_safe_halt(void) +{ + int idle = vmi_stop_hz_timer(); + vmi_ops.halt(); + if (idle) { + local_irq_disable(); + vmi_account_time_restart_hz_timer(); + local_irq_enable(); + } +} +#endif #ifdef CONFIG_DEBUG_PAGE_TYPE @@ -727,7 +742,12 @@ static inline int __init activate_vmi(void) (char *)paravirt_ops.save_fl); patch_offset(&irq_save_disable_callout[IRQ_PATCH_DISABLE], (char *)paravirt_ops.irq_disable); +#ifndef CONFIG_NO_IDLE_HZ para_fill(safe_halt, Halt); +#else + vmi_ops.halt = vmi_get_function(VMI_CALL_Halt); + paravirt_ops.safe_halt = vmi_safe_halt; +#endif para_fill(wbinvd, WBINVD); /* paravirt_ops.read_msr = vmi_rdmsr */ /* paravirt_ops.write_msr = vmi_wrmsr */ @@ -838,6 +858,31 @@ static inline int __init activate_vmi(void) #endif /* + * Check for VMI timer functionality by probing for a cycle frequency method + */ + reloc = call_vrom_long_func(vmi_rom, get_reloc, VMI_CALL_GetCycleFrequency); + if (rel->type != VMI_RELOCATION_NONE) { + vmi_timer_ops.get_cycle_frequency = (void *)rel->eip; + vmi_timer_ops.get_cycle_counter = + vmi_get_function(VMI_CALL_GetCycleCounter); + vmi_timer_ops.get_wallclock = + vmi_get_function(VMI_CALL_GetWallclockTime); + vmi_timer_ops.wallclock_updated = + vmi_get_function(VMI_CALL_WallclockUpdated); + vmi_timer_ops.set_alarm = vmi_get_function(VMI_CALL_SetAlarm); + vmi_timer_ops.cancel_alarm = + vmi_get_function(VMI_CALL_CancelAlarm); + paravirt_ops.time_init = vmi_time_init; + paravirt_ops.get_wallclock = vmi_get_wallclock; + paravirt_ops.set_wallclock = vmi_set_wallclock; +#ifdef CONFIG_X86_LOCAL_APIC + paravirt_ops.setup_boot_clock = vmi_timer_setup_boot_alarm; + paravirt_ops.setup_secondary_clock = vmi_timer_setup_secondary_alarm; +#endif + custom_sched_clock = vmi_sched_clock; + } + + /* * Alternative instruction rewriting doesn't happen soon enough * to convert VMI_IRET to a call instead of a jump; so we have * to do this before IRQs get reenabled. Fortunately, it is |