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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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f87e4cac4f
This is a fairly straightforward Xen implementation of smp_ops. Xen has its own IPI mechanisms, and has no dependency on any APIC-based IPI. The smp_ops hooks and the flush_tlb_others pv_op allow a Xen guest to avoid all APIC code in arch/i386 (the only apic operation is a single apic_read for the apic version number). One subtle point which needs to be addressed is unpinning pagetables when another cpu may have a lazy tlb reference to the pagetable. Xen will not allow an in-use pagetable to be unpinned, so we must find any other cpus with a reference to the pagetable and get them to shoot down their references. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Andi Kleen <ak@suse.de>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
#ifndef XEN_OPS_H
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#define XEN_OPS_H
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#include <linux/init.h>
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/* These are code, but not functions. Defined in entry.S */
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extern const char xen_hypervisor_callback[];
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extern const char xen_failsafe_callback[];
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void xen_copy_trap_info(struct trap_info *traps);
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DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
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DECLARE_PER_CPU(unsigned long, xen_cr3);
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extern struct start_info *xen_start_info;
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extern struct shared_info *HYPERVISOR_shared_info;
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char * __init xen_memory_setup(void);
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void __init xen_arch_setup(void);
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void __init xen_init_IRQ(void);
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void xen_setup_timer(int cpu);
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void xen_setup_cpu_clockevents(void);
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unsigned long xen_cpu_khz(void);
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void __init xen_time_init(void);
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unsigned long xen_get_wallclock(void);
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int xen_set_wallclock(unsigned long time);
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unsigned long long xen_sched_clock(void);
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void xen_mark_init_mm_pinned(void);
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DECLARE_PER_CPU(enum paravirt_lazy_mode, xen_lazy_mode);
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static inline unsigned xen_get_lazy_mode(void)
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{
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return x86_read_percpu(xen_lazy_mode);
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}
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void __init xen_fill_possible_map(void);
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void xen_vcpu_setup(int cpu);
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void xen_smp_prepare_boot_cpu(void);
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void xen_smp_prepare_cpus(unsigned int max_cpus);
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int xen_cpu_up(unsigned int cpu);
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void xen_smp_cpus_done(unsigned int max_cpus);
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void xen_smp_send_stop(void);
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void xen_smp_send_reschedule(int cpu);
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int xen_smp_call_function (void (*func) (void *info), void *info, int nonatomic,
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int wait);
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int xen_smp_call_function_single(int cpu, void (*func) (void *info), void *info,
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int nonatomic, int wait);
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int xen_smp_call_function_mask(cpumask_t mask, void (*func)(void *),
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void *info, int wait);
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#endif /* XEN_OPS_H */
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