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55aedddb61
The one paravirt read_cr2() implementation (Xen) is actually quite trivial and doesn't need to clobber anything other than the return register. Making read_cr2() CALLEE_SAVE avoids all the PUSH/POP nonsense and allows more convenient use from assembly. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: bp@alien8.de Cc: rostedt@goodmis.org Cc: luto@kernel.org Cc: torvalds@linux-foundation.org Cc: hpa@zytor.com Cc: dave.hansen@linux.intel.com Cc: zhe.he@windriver.com Cc: joel@joelfernandes.org Cc: devel@etsukata.com Link: https://lkml.kernel.org/r/20190711114335.887392493@infradead.org
168 lines
4.4 KiB
C
168 lines
4.4 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_hypervisor_callback[];
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extern const char xen_failsafe_callback[];
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void xen_sysenter_target(void);
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#ifdef CONFIG_X86_64
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void xen_syscall_target(void);
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void xen_syscall32_target(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(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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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 xen_reserve_top(void);
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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_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_callback_vector(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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irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
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bool xen_vcpu_stolen(int vcpu);
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extern int xen_have_vcpu_info_placement;
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int 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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#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)
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{
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}
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#endif
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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 void xen_restore_fl_direct(unsigned long);
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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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__visible void xen_sysret32(void);
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__visible void xen_sysret64(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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#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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#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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