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 #ifdef CONFIG_X86 26 #include <asm/cpufeature.h> 27 28 #define xen_pv_domain() (cpu_feature_enabled(X86_FEATURE_XENPV)) 29 #else 30 #define xen_pv_domain() 0 31 #endif 32 33 #define xen_domain() (xen_domain_type != XEN_NATIVE) 34 #define xen_hvm_domain() (xen_domain_type == XEN_HVM_DOMAIN) 35 #define xen_pvh_domain() (xen_pvh) 36 37 extern uint32_t xen_start_flags; 38 39 #ifdef CONFIG_XEN_PV 40 extern bool xen_pv_pci_possible; 41 #else 42 #define xen_pv_pci_possible 0 43 #endif 44 45 #include <xen/interface/hvm/start_info.h> 46 extern struct hvm_start_info pvh_start_info; 47 void xen_prepare_pvh(void); 48 struct pt_regs; 49 void xen_pv_evtchn_do_upcall(struct pt_regs *regs); 50 51 #ifdef CONFIG_XEN_DOM0 52 #include <xen/interface/xen.h> 53 #include <asm/xen/hypervisor.h> 54 55 #define xen_initial_domain() (xen_domain() && \ 56 (xen_start_flags & SIF_INITDOMAIN)) 57 #else /* !CONFIG_XEN_DOM0 */ 58 #define xen_initial_domain() (0) 59 #endif /* CONFIG_XEN_DOM0 */ 60 61 struct bio_vec; 62 struct page; 63 64 bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, 65 const struct page *page); 66 67 #if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON) 68 extern u64 xen_saved_max_mem_size; 69 #endif 70 71 #ifdef CONFIG_XEN_UNPOPULATED_ALLOC 72 int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages); 73 void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages); 74 #include <linux/ioport.h> 75 int arch_xen_unpopulated_init(struct resource **res); 76 #else 77 #include <xen/balloon.h> 78 static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages, 79 struct page **pages) 80 { 81 return xen_alloc_ballooned_pages(nr_pages, pages); 82 } 83 static inline void xen_free_unpopulated_pages(unsigned int nr_pages, 84 struct page **pages) 85 { 86 xen_free_ballooned_pages(nr_pages, pages); 87 } 88 #endif 89 90 #if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86) 91 bool __init xen_processor_present(uint32_t acpi_id); 92 #else 93 #include <linux/bug.h> 94 static inline bool xen_processor_present(uint32_t acpi_id) 95 { 96 BUG(); 97 return false; 98 } 99 #endif 100 101 #endif /* _XEN_XEN_H */ 102