struct mm_struct;
struct desc_struct;
-/* Lazy mode for batching updates / context switch */
-enum paravirt_lazy_mode {
- PARAVIRT_LAZY_NONE = 0,
- PARAVIRT_LAZY_MMU = 1,
- PARAVIRT_LAZY_CPU = 2,
- PARAVIRT_LAZY_FLUSH = 3,
-};
-
-
/* general info */
struct pv_info {
unsigned int kernel_rpl;
};
-struct pv_misc_ops {
+struct pv_lazy_ops {
/* Set deferred update mode, used for batching operations. */
- void (*set_lazy_mode)(enum paravirt_lazy_mode mode);
+ void (*enter)(void);
+ void (*leave)(void);
};
struct pv_time_ops {
/* These two are jmp to, not actually called. */
void (*irq_enable_sysexit)(void);
void (*iret)(void);
+
+ struct pv_lazy_ops lazy_mode;
};
struct pv_irq_ops {
#ifdef CONFIG_HIGHPTE
void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
#endif
+
+ struct pv_lazy_ops lazy_mode;
};
/* This contains all the paravirt structures: we get a convenient
struct paravirt_patch_template
{
struct pv_init_ops pv_init_ops;
- struct pv_misc_ops pv_misc_ops;
struct pv_time_ops pv_time_ops;
struct pv_cpu_ops pv_cpu_ops;
struct pv_irq_ops pv_irq_ops;
extern struct pv_info pv_info;
extern struct pv_init_ops pv_init_ops;
-extern struct pv_misc_ops pv_misc_ops;
extern struct pv_time_ops pv_time_ops;
extern struct pv_cpu_ops pv_cpu_ops;
extern struct pv_irq_ops pv_irq_ops;
}
#endif /* CONFIG_X86_PAE */
+/* Lazy mode for batching updates / context switch */
+enum paravirt_lazy_mode {
+ PARAVIRT_LAZY_NONE,
+ PARAVIRT_LAZY_MMU,
+ PARAVIRT_LAZY_CPU,
+};
+
+enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
+void paravirt_enter_lazy_cpu(void);
+void paravirt_leave_lazy_cpu(void);
+void paravirt_enter_lazy_mmu(void);
+void paravirt_leave_lazy_mmu(void);
+void paravirt_leave_lazy(enum paravirt_lazy_mode mode);
+
#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
static inline void arch_enter_lazy_cpu_mode(void)
{
- PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_CPU);
+ PVOP_VCALL0(pv_cpu_ops.lazy_mode.enter);
}
static inline void arch_leave_lazy_cpu_mode(void)
{
- PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_NONE);
+ PVOP_VCALL0(pv_cpu_ops.lazy_mode.leave);
}
static inline void arch_flush_lazy_cpu_mode(void)
{
- PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_FLUSH);
+ if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU)) {
+ arch_leave_lazy_cpu_mode();
+ arch_enter_lazy_cpu_mode();
+ }
}
#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
static inline void arch_enter_lazy_mmu_mode(void)
{
- PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_MMU);
+ PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter);
}
static inline void arch_leave_lazy_mmu_mode(void)
{
- PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_NONE);
+ PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
}
static inline void arch_flush_lazy_mmu_mode(void)
{
- PVOP_VCALL1(pv_misc_ops.set_lazy_mode, PARAVIRT_LAZY_FLUSH);
+ if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU)) {
+ arch_leave_lazy_mmu_mode();
+ arch_enter_lazy_mmu_mode();
+ }
}
void _paravirt_nop(void);