linux/include/asm-ia64/paravirt.h
Isaku Yamahata 00d21d82b8 [IA64] pvops: add to hooks, pv_time_ops, for steal time accounting.
Introduce pv_time_ops which adds hook to steal time accounting.
On virtualized environment, cpus are shared by many guests and
steal time is the time which is used for other guests.
On virtualized environtment, streal time should be accounted.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-05-27 15:11:42 -07:00

256 lines
5.9 KiB
C

/******************************************************************************
* include/asm-ia64/paravirt.h
*
* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __ASM_PARAVIRT_H
#define __ASM_PARAVIRT_H
#ifdef CONFIG_PARAVIRT_GUEST
#define PARAVIRT_HYPERVISOR_TYPE_DEFAULT 0
#define PARAVIRT_HYPERVISOR_TYPE_XEN 1
#ifndef __ASSEMBLY__
#include <asm/hw_irq.h>
#include <asm/meminit.h>
/******************************************************************************
* general info
*/
struct pv_info {
unsigned int kernel_rpl;
int paravirt_enabled;
const char *name;
};
extern struct pv_info pv_info;
static inline int paravirt_enabled(void)
{
return pv_info.paravirt_enabled;
}
static inline unsigned int get_kernel_rpl(void)
{
return pv_info.kernel_rpl;
}
/******************************************************************************
* initialization hooks.
*/
struct rsvd_region;
struct pv_init_ops {
void (*banner)(void);
int (*reserve_memory)(struct rsvd_region *region);
void (*arch_setup_early)(void);
void (*arch_setup_console)(char **cmdline_p);
int (*arch_setup_nomca)(void);
void (*post_smp_prepare_boot_cpu)(void);
};
extern struct pv_init_ops pv_init_ops;
static inline void paravirt_banner(void)
{
if (pv_init_ops.banner)
pv_init_ops.banner();
}
static inline int paravirt_reserve_memory(struct rsvd_region *region)
{
if (pv_init_ops.reserve_memory)
return pv_init_ops.reserve_memory(region);
return 0;
}
static inline void paravirt_arch_setup_early(void)
{
if (pv_init_ops.arch_setup_early)
pv_init_ops.arch_setup_early();
}
static inline void paravirt_arch_setup_console(char **cmdline_p)
{
if (pv_init_ops.arch_setup_console)
pv_init_ops.arch_setup_console(cmdline_p);
}
static inline int paravirt_arch_setup_nomca(void)
{
if (pv_init_ops.arch_setup_nomca)
return pv_init_ops.arch_setup_nomca();
return 0;
}
static inline void paravirt_post_smp_prepare_boot_cpu(void)
{
if (pv_init_ops.post_smp_prepare_boot_cpu)
pv_init_ops.post_smp_prepare_boot_cpu();
}
/******************************************************************************
* replacement of iosapic operations.
*/
struct pv_iosapic_ops {
void (*pcat_compat_init)(void);
struct irq_chip *(*get_irq_chip)(unsigned long trigger);
unsigned int (*__read)(char __iomem *iosapic, unsigned int reg);
void (*__write)(char __iomem *iosapic, unsigned int reg, u32 val);
};
extern struct pv_iosapic_ops pv_iosapic_ops;
static inline void
iosapic_pcat_compat_init(void)
{
if (pv_iosapic_ops.pcat_compat_init)
pv_iosapic_ops.pcat_compat_init();
}
static inline struct irq_chip*
iosapic_get_irq_chip(unsigned long trigger)
{
return pv_iosapic_ops.get_irq_chip(trigger);
}
static inline unsigned int
__iosapic_read(char __iomem *iosapic, unsigned int reg)
{
return pv_iosapic_ops.__read(iosapic, reg);
}
static inline void
__iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
{
return pv_iosapic_ops.__write(iosapic, reg, val);
}
/******************************************************************************
* replacement of irq operations.
*/
struct pv_irq_ops {
void (*register_ipi)(void);
int (*assign_irq_vector)(int irq);
void (*free_irq_vector)(int vector);
void (*register_percpu_irq)(ia64_vector vec,
struct irqaction *action);
void (*resend_irq)(unsigned int vector);
};
extern struct pv_irq_ops pv_irq_ops;
static inline void
ia64_register_ipi(void)
{
pv_irq_ops.register_ipi();
}
static inline int
assign_irq_vector(int irq)
{
return pv_irq_ops.assign_irq_vector(irq);
}
static inline void
free_irq_vector(int vector)
{
return pv_irq_ops.free_irq_vector(vector);
}
static inline void
register_percpu_irq(ia64_vector vec, struct irqaction *action)
{
pv_irq_ops.register_percpu_irq(vec, action);
}
static inline void
ia64_resend_irq(unsigned int vector)
{
pv_irq_ops.resend_irq(vector);
}
/******************************************************************************
* replacement of time operations.
*/
extern struct itc_jitter_data_t itc_jitter_data;
extern volatile int time_keeper_id;
struct pv_time_ops {
void (*init_missing_ticks_accounting)(int cpu);
int (*do_steal_accounting)(unsigned long *new_itm);
void (*clocksource_resume)(void);
};
extern struct pv_time_ops pv_time_ops;
static inline void
paravirt_init_missing_ticks_accounting(int cpu)
{
if (pv_time_ops.init_missing_ticks_accounting)
pv_time_ops.init_missing_ticks_accounting(cpu);
}
static inline int
paravirt_do_steal_accounting(unsigned long *new_itm)
{
return pv_time_ops.do_steal_accounting(new_itm);
}
#endif /* !__ASSEMBLY__ */
#else
/* fallback for native case */
#ifndef __ASSEMBLY__
#define paravirt_banner() do { } while (0)
#define paravirt_reserve_memory(region) 0
#define paravirt_arch_setup_early() do { } while (0)
#define paravirt_arch_setup_console(cmdline_p) do { } while (0)
#define paravirt_arch_setup_nomca() 0
#define paravirt_post_smp_prepare_boot_cpu() do { } while (0)
#define paravirt_init_missing_ticks_accounting(cpu) do { } while (0)
#define paravirt_do_steal_accounting(new_itm) 0
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT_GUEST */
#endif /* __ASM_PARAVIRT_H */