1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _XEN_XEN_H 3 #define _XEN_XEN_H 4 5 #include <linux/types.h> 6 7 enum xen_domain_type { 8 XEN_NATIVE, /* running on bare hardware */ 9 XEN_PV_DOMAIN, /* running in a PV domain */ 10 XEN_HVM_DOMAIN, /* running in a Xen hvm domain */ 11 }; 12 13 #ifdef CONFIG_XEN 14 extern enum xen_domain_type xen_domain_type; 15 #else 16 #define xen_domain_type XEN_NATIVE 17 #endif 18 19 #ifdef CONFIG_XEN_PVH 20 extern bool xen_pvh; 21 #else 22 #define xen_pvh 0 23 #endif 24 25 #define xen_domain() (xen_domain_type != XEN_NATIVE) 26 #define xen_pv_domain() (xen_domain_type == XEN_PV_DOMAIN) 27 #define xen_hvm_domain() (xen_domain_type == XEN_HVM_DOMAIN) 28 #define xen_pvh_domain() (xen_pvh) 29 30 extern uint32_t xen_start_flags; 31 32 #ifdef CONFIG_XEN_PV 33 extern bool xen_pv_pci_possible; 34 #else 35 #define xen_pv_pci_possible 0 36 #endif 37 38 #include <xen/interface/hvm/start_info.h> 39 extern struct hvm_start_info pvh_start_info; 40 void xen_prepare_pvh(void); 41 struct pt_regs; 42 void xen_pv_evtchn_do_upcall(struct pt_regs *regs); 43 44 #ifdef CONFIG_XEN_DOM0 45 #include <xen/interface/xen.h> 46 #include <asm/xen/hypervisor.h> 47 48 #define xen_initial_domain() (xen_domain() && \ 49 (xen_start_flags & SIF_INITDOMAIN)) 50 #else /* !CONFIG_XEN_DOM0 */ 51 #define xen_initial_domain() (0) 52 #endif /* CONFIG_XEN_DOM0 */ 53 54 struct bio_vec; 55 struct page; 56 57 bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, 58 const struct page *page); 59 60 #if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON) 61 extern u64 xen_saved_max_mem_size; 62 #endif 63 64 #ifdef CONFIG_XEN_UNPOPULATED_ALLOC 65 int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages); 66 void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages); 67 #include <linux/ioport.h> 68 int arch_xen_unpopulated_init(struct resource **res); 69 #else 70 #include <xen/balloon.h> 71 static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages, 72 struct page **pages) 73 { 74 return xen_alloc_ballooned_pages(nr_pages, pages); 75 } 76 static inline void xen_free_unpopulated_pages(unsigned int nr_pages, 77 struct page **pages) 78 { 79 xen_free_ballooned_pages(nr_pages, pages); 80 } 81 #endif 82 83 #if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86) 84 bool __init xen_processor_present(uint32_t acpi_id); 85 #else 86 #include <linux/bug.h> 87 static inline bool xen_processor_present(uint32_t acpi_id) 88 { 89 BUG(); 90 return false; 91 } 92 #endif 93 94 #endif /* _XEN_XEN_H */ 95