Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _XEN_XEN_H 3#define _XEN_XEN_H 4 5#include <linux/types.h> 6 7enum 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 14extern enum xen_domain_type xen_domain_type; 15#else 16#define xen_domain_type XEN_NATIVE 17#endif 18 19#ifdef CONFIG_XEN_PVH 20extern 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 37extern uint32_t xen_start_flags; 38 39#ifdef CONFIG_XEN_PV 40extern 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> 46extern struct hvm_start_info pvh_start_info; 47void xen_prepare_pvh(void); 48struct pt_regs; 49void 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 61struct bio_vec; 62struct page; 63 64bool 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) 68extern u64 xen_saved_max_mem_size; 69#endif 70 71#ifdef CONFIG_XEN_UNPOPULATED_ALLOC 72extern unsigned long xen_unpopulated_pages; 73int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages); 74void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages); 75#include <linux/ioport.h> 76int arch_xen_unpopulated_init(struct resource **res); 77#else 78#define xen_unpopulated_pages 0UL 79#include <xen/balloon.h> 80static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages, 81 struct page **pages) 82{ 83 return xen_alloc_ballooned_pages(nr_pages, pages); 84} 85static inline void xen_free_unpopulated_pages(unsigned int nr_pages, 86 struct page **pages) 87{ 88 xen_free_ballooned_pages(nr_pages, pages); 89} 90#endif 91 92#if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86) 93bool __init xen_processor_present(uint32_t acpi_id); 94#else 95#include <linux/bug.h> 96static inline bool xen_processor_present(uint32_t acpi_id) 97{ 98 BUG(); 99 return false; 100} 101#endif 102 103#endif /* _XEN_XEN_H */