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