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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/xen/xen.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef _XEN_XEN_H

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#define _XEN_XEN_H

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#include <linux/types.h>

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enum xen_domain_type {

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	XEN_NATIVE,		/* running on bare hardware    */

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	XEN_PV_DOMAIN,		/* running in a PV domain      */

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	XEN_HVM_DOMAIN,		/* running in a Xen hvm domain */

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};

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#ifdef CONFIG_XEN

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extern enum xen_domain_type xen_domain_type;

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#else

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#define xen_domain_type		XEN_NATIVE

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#endif

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#ifdef CONFIG_XEN_PVH

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extern bool xen_pvh;

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#else

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#define xen_pvh			0

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#endif

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#ifdef CONFIG_X86

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#include <asm/cpufeature.h>

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#define xen_pv_domain()		(cpu_feature_enabled(X86_FEATURE_XENPV))

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#else

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#define xen_pv_domain()		0

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#endif

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#define xen_domain()		(xen_domain_type != XEN_NATIVE)

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#define xen_hvm_domain()	(xen_domain_type == XEN_HVM_DOMAIN)

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#define xen_pvh_domain()	(xen_pvh)

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extern uint32_t xen_start_flags;

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#ifdef CONFIG_XEN_PV

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extern bool xen_pv_pci_possible;

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#else

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#define xen_pv_pci_possible	0

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#endif

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#include <xen/interface/hvm/start_info.h>

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extern struct hvm_start_info pvh_start_info;

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void xen_prepare_pvh(void);

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struct pt_regs;

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void xen_pv_evtchn_do_upcall(struct pt_regs *regs);

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#ifdef CONFIG_XEN_DOM0

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#include <xen/interface/xen.h>

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#include <asm/xen/hypervisor.h>

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#define xen_initial_domain()	(xen_domain() && \

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				 (xen_start_flags & SIF_INITDOMAIN))

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#else  /* !CONFIG_XEN_DOM0 */

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#define xen_initial_domain()	(0)

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#endif	/* CONFIG_XEN_DOM0 */

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struct bio_vec;

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struct page;

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bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,

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		const struct page *page);

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#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)

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extern u64 xen_saved_max_mem_size;

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#endif

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#ifdef CONFIG_XEN_UNPOPULATED_ALLOC

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int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);

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void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);

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#include <linux/ioport.h>

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int arch_xen_unpopulated_init(struct resource **res);

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#else

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#include <xen/balloon.h>

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static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages,

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		struct page **pages)

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{

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	return xen_alloc_ballooned_pages(nr_pages, pages);

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}

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static inline void xen_free_unpopulated_pages(unsigned int nr_pages,

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		struct page **pages)

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{

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	xen_free_ballooned_pages(nr_pages, pages);

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}

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#endif

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#if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86)

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bool __init xen_processor_present(uint32_t acpi_id);

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#else

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#include <linux/bug.h>

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static inline bool xen_processor_present(uint32_t acpi_id)

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{

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	BUG();

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	return false;

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}

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#endif

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#endif	/* _XEN_XEN_H */

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