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db2832309a
Today the percpu struct vcpu_info is allocated via DEFINE_PER_CPU(),
meaning that it could cross a page boundary. In this case registering
it with the hypervisor will fail, resulting in a panic().
This can easily be fixed by using DEFINE_PER_CPU_ALIGNED() instead,
as struct vcpu_info is guaranteed to have a size of 64 bytes, matching
the cache line size of x86 64-bit processors (Xen doesn't support
32-bit processors).
Fixes: 5ead97c84f ("xen: Core Xen implementation")
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.con>
Link: https://lore.kernel.org/r/20231124074852.25161-1-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
167 lines
4.3 KiB
C
167 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef XEN_OPS_H
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#define XEN_OPS_H
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#include <linux/init.h>
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#include <linux/clocksource.h>
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#include <linux/irqreturn.h>
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#include <xen/xen-ops.h>
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/* These are code, but not functions. Defined in entry.S */
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extern const char xen_failsafe_callback[];
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void xen_entry_SYSENTER_compat(void);
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#ifdef CONFIG_X86_64
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void xen_entry_SYSCALL_64(void);
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void xen_entry_SYSCALL_compat(void);
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#endif
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extern void *xen_initial_gdt;
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struct trap_info;
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void xen_copy_trap_info(struct trap_info *traps);
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DECLARE_PER_CPU_ALIGNED(struct vcpu_info, xen_vcpu_info);
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DECLARE_PER_CPU(unsigned long, xen_cr3);
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DECLARE_PER_CPU(unsigned long, xen_current_cr3);
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extern struct start_info *xen_start_info;
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extern struct shared_info xen_dummy_shared_info;
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extern struct shared_info *HYPERVISOR_shared_info;
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extern bool xen_fifo_events;
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void xen_setup_mfn_list_list(void);
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void xen_build_mfn_list_list(void);
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void xen_setup_machphys_mapping(void);
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void xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn);
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void __init xen_reserve_special_pages(void);
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void __init xen_pt_check_e820(void);
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void xen_mm_pin_all(void);
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void xen_mm_unpin_all(void);
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#ifdef CONFIG_X86_64
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void __init xen_relocate_p2m(void);
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#endif
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bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size);
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unsigned long __ref xen_chk_extra_mem(unsigned long pfn);
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void __init xen_inv_extra_mem(void);
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void __init xen_remap_memory(void);
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phys_addr_t __init xen_find_free_area(phys_addr_t size);
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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 xen_banner(void);
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void xen_enable_sysenter(void);
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void xen_enable_syscall(void);
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void xen_vcpu_restore(void);
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void xen_hvm_init_shared_info(void);
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void xen_unplug_emulated_devices(void);
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void __init xen_build_dynamic_phys_to_machine(void);
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void __init xen_vmalloc_p2m_tree(void);
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void xen_init_irq_ops(void);
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void xen_setup_timer(int cpu);
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void xen_setup_runstate_info(int cpu);
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void xen_teardown_timer(int cpu);
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void xen_setup_cpu_clockevents(void);
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void xen_save_time_memory_area(void);
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void xen_restore_time_memory_area(void);
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void xen_init_time_ops(void);
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void xen_hvm_init_time_ops(void);
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bool xen_vcpu_stolen(int vcpu);
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void xen_vcpu_setup(int cpu);
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void xen_vcpu_info_reset(int cpu);
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void xen_setup_vcpu_info_placement(void);
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#ifdef CONFIG_SMP
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void xen_smp_init(void);
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void __init xen_hvm_smp_init(void);
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extern cpumask_var_t xen_cpu_initialized_map;
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#else
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static inline void xen_smp_init(void) {}
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static inline void xen_hvm_smp_init(void) {}
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#endif
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#ifdef CONFIG_PARAVIRT_SPINLOCKS
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void __init xen_init_spinlocks(void);
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void xen_init_lock_cpu(int cpu);
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void xen_uninit_lock_cpu(int cpu);
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#else
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static inline void xen_init_spinlocks(void)
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{
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}
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static inline void xen_init_lock_cpu(int cpu)
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{
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}
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static inline void xen_uninit_lock_cpu(int cpu)
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{
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}
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#endif
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struct dom0_vga_console_info;
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#ifdef CONFIG_XEN_DOM0
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void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size,
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struct screen_info *);
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#else
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static inline void __init xen_init_vga(const struct dom0_vga_console_info *info,
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size_t size, struct screen_info *si)
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{
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}
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#endif
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void xen_add_preferred_consoles(void);
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void __init xen_init_apic(void);
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#ifdef CONFIG_XEN_EFI
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extern void xen_efi_init(struct boot_params *boot_params);
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#else
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static inline void __init xen_efi_init(struct boot_params *boot_params)
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{
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}
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#endif
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__visible void xen_irq_enable_direct(void);
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__visible void xen_irq_disable_direct(void);
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__visible unsigned long xen_save_fl_direct(void);
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__visible unsigned long xen_read_cr2(void);
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__visible unsigned long xen_read_cr2_direct(void);
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/* These are not functions, and cannot be called normally */
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__visible void xen_iret(void);
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extern int xen_panic_handler_init(void);
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int xen_cpuhp_setup(int (*cpu_up_prepare_cb)(unsigned int),
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int (*cpu_dead_cb)(unsigned int));
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void xen_pin_vcpu(int cpu);
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void xen_emergency_restart(void);
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void xen_force_evtchn_callback(void);
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#ifdef CONFIG_XEN_PV
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void xen_pv_pre_suspend(void);
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void xen_pv_post_suspend(int suspend_cancelled);
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void xen_start_kernel(struct start_info *si);
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#else
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static inline void xen_pv_pre_suspend(void) {}
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static inline void xen_pv_post_suspend(int suspend_cancelled) {}
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#endif
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#ifdef CONFIG_XEN_PVHVM
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void xen_hvm_post_suspend(int suspend_cancelled);
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#else
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static inline void xen_hvm_post_suspend(int suspend_cancelled) {}
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#endif
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#endif /* XEN_OPS_H */
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