mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-10 18:53:38 +00:00
c9b5d98b25
The hypercall VCPUOP_register_vcpu_info can fail. This failure is handled by making per_cpu(xen_vcpu, cpu) point to its shared_info slot and those without one (cpu >= MAX_VIRT_CPUS) be NULL. For PVH/PVHVM, this is not enough, because we also need to pull these VCPUs out of circulation. Fix for PVH/PVHVM: on registration failure in the cpuhp prepare callback (xen_cpu_up_prepare_hvm()), return an error to the cpuhp state-machine so it can fail the CPU init. Fix for PV: the registration happens before smp_init(), so, in the failure case we clamp setup_max_cpus and limit the number of VCPUs that smp_init() will bring-up to MAX_VIRT_CPUS. This is functionally correct but it makes the code a bit simpler if we get rid of this explicit clamping: for VCPUs that don't have valid xen_vcpu, fail the CPU init in the cpuhp prepare callback (xen_cpu_up_prepare_pv()). Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
172 lines
4.5 KiB
C
172 lines
4.5 KiB
C
#ifndef XEN_OPS_H
|
|
#define XEN_OPS_H
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/irqreturn.h>
|
|
#include <xen/xen-ops.h>
|
|
|
|
/* These are code, but not functions. Defined in entry.S */
|
|
extern const char xen_hypervisor_callback[];
|
|
extern const char xen_failsafe_callback[];
|
|
|
|
void xen_sysenter_target(void);
|
|
#ifdef CONFIG_X86_64
|
|
void xen_syscall_target(void);
|
|
void xen_syscall32_target(void);
|
|
#endif
|
|
|
|
extern void *xen_initial_gdt;
|
|
|
|
struct trap_info;
|
|
void xen_copy_trap_info(struct trap_info *traps);
|
|
|
|
DECLARE_PER_CPU(struct vcpu_info, xen_vcpu_info);
|
|
DECLARE_PER_CPU(unsigned long, xen_cr3);
|
|
DECLARE_PER_CPU(unsigned long, xen_current_cr3);
|
|
|
|
extern struct start_info *xen_start_info;
|
|
extern struct shared_info xen_dummy_shared_info;
|
|
extern struct shared_info *HYPERVISOR_shared_info;
|
|
|
|
void xen_setup_mfn_list_list(void);
|
|
void xen_setup_shared_info(void);
|
|
void xen_build_mfn_list_list(void);
|
|
void xen_setup_machphys_mapping(void);
|
|
void xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn);
|
|
void xen_reserve_top(void);
|
|
void __init xen_reserve_special_pages(void);
|
|
void __init xen_pt_check_e820(void);
|
|
|
|
void xen_mm_pin_all(void);
|
|
void xen_mm_unpin_all(void);
|
|
#ifdef CONFIG_X86_64
|
|
void __init xen_relocate_p2m(void);
|
|
#endif
|
|
|
|
bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size);
|
|
unsigned long __ref xen_chk_extra_mem(unsigned long pfn);
|
|
void __init xen_inv_extra_mem(void);
|
|
void __init xen_remap_memory(void);
|
|
phys_addr_t __init xen_find_free_area(phys_addr_t size);
|
|
char * __init xen_memory_setup(void);
|
|
char * xen_auto_xlated_memory_setup(void);
|
|
void __init xen_arch_setup(void);
|
|
void xen_enable_sysenter(void);
|
|
void xen_enable_syscall(void);
|
|
void xen_vcpu_restore(void);
|
|
|
|
void xen_callback_vector(void);
|
|
void xen_hvm_init_shared_info(void);
|
|
void xen_unplug_emulated_devices(void);
|
|
|
|
void __init xen_build_dynamic_phys_to_machine(void);
|
|
void __init xen_vmalloc_p2m_tree(void);
|
|
|
|
void xen_init_irq_ops(void);
|
|
void xen_setup_timer(int cpu);
|
|
void xen_setup_runstate_info(int cpu);
|
|
void xen_teardown_timer(int cpu);
|
|
u64 xen_clocksource_read(void);
|
|
void xen_setup_cpu_clockevents(void);
|
|
void __init xen_init_time_ops(void);
|
|
void __init xen_hvm_init_time_ops(void);
|
|
|
|
irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
|
|
|
|
bool xen_vcpu_stolen(int vcpu);
|
|
|
|
extern int xen_have_vcpu_info_placement;
|
|
|
|
int xen_vcpu_setup(int cpu);
|
|
void xen_vcpu_info_reset(int cpu);
|
|
void xen_setup_vcpu_info_placement(void);
|
|
|
|
#ifdef CONFIG_SMP
|
|
void xen_smp_init(void);
|
|
void __init xen_hvm_smp_init(void);
|
|
|
|
extern cpumask_var_t xen_cpu_initialized_map;
|
|
#else
|
|
static inline void xen_smp_init(void) {}
|
|
static inline void xen_hvm_smp_init(void) {}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PARAVIRT_SPINLOCKS
|
|
void __init xen_init_spinlocks(void);
|
|
void xen_init_lock_cpu(int cpu);
|
|
void xen_uninit_lock_cpu(int cpu);
|
|
#else
|
|
static inline void xen_init_spinlocks(void)
|
|
{
|
|
}
|
|
static inline void xen_init_lock_cpu(int cpu)
|
|
{
|
|
}
|
|
static inline void xen_uninit_lock_cpu(int cpu)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
struct dom0_vga_console_info;
|
|
|
|
#ifdef CONFIG_XEN_DOM0
|
|
void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size);
|
|
#else
|
|
static inline void __init xen_init_vga(const struct dom0_vga_console_info *info,
|
|
size_t size)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
void __init xen_init_apic(void);
|
|
|
|
#ifdef CONFIG_XEN_EFI
|
|
extern void xen_efi_init(void);
|
|
#else
|
|
static inline void __init xen_efi_init(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/* Declare an asm function, along with symbols needed to make it
|
|
inlineable */
|
|
#define DECL_ASM(ret, name, ...) \
|
|
__visible ret name(__VA_ARGS__); \
|
|
extern char name##_end[] __visible; \
|
|
extern char name##_reloc[] __visible
|
|
|
|
DECL_ASM(void, xen_irq_enable_direct, void);
|
|
DECL_ASM(void, xen_irq_disable_direct, void);
|
|
DECL_ASM(unsigned long, xen_save_fl_direct, void);
|
|
DECL_ASM(void, xen_restore_fl_direct, unsigned long);
|
|
|
|
/* These are not functions, and cannot be called normally */
|
|
__visible void xen_iret(void);
|
|
__visible void xen_sysret32(void);
|
|
__visible void xen_sysret64(void);
|
|
__visible void xen_adjust_exception_frame(void);
|
|
|
|
extern int xen_panic_handler_init(void);
|
|
|
|
int xen_cpuhp_setup(int (*cpu_up_prepare_cb)(unsigned int),
|
|
int (*cpu_dead_cb)(unsigned int));
|
|
|
|
void xen_pin_vcpu(int cpu);
|
|
|
|
void xen_emergency_restart(void);
|
|
#ifdef CONFIG_XEN_PV
|
|
void xen_pv_pre_suspend(void);
|
|
void xen_pv_post_suspend(int suspend_cancelled);
|
|
#else
|
|
static inline void xen_pv_pre_suspend(void) {}
|
|
static inline void xen_pv_post_suspend(int suspend_cancelled) {}
|
|
#endif
|
|
|
|
#ifdef CONFIG_XEN_PVHVM
|
|
void xen_hvm_post_suspend(int suspend_cancelled);
|
|
#else
|
|
static inline void xen_hvm_post_suspend(int suspend_cancelled) {}
|
|
#endif
|
|
|
|
#endif /* XEN_OPS_H */
|