summaryrefslogtreecommitdiffstats
path: root/kernel/include/xen/xen-ops.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/include/xen/xen-ops.h')
-rw-r--r--kernel/include/xen/xen-ops.h121
1 files changed, 121 insertions, 0 deletions
diff --git a/kernel/include/xen/xen-ops.h b/kernel/include/xen/xen-ops.h
new file mode 100644
index 000000000..0ce4f3201
--- /dev/null
+++ b/kernel/include/xen/xen-ops.h
@@ -0,0 +1,121 @@
+#ifndef INCLUDE_XEN_OPS_H
+#define INCLUDE_XEN_OPS_H
+
+#include <linux/percpu.h>
+#include <linux/notifier.h>
+#include <linux/efi.h>
+#include <asm/xen/interface.h>
+
+DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
+
+void xen_arch_pre_suspend(void);
+void xen_arch_post_suspend(int suspend_cancelled);
+
+void xen_timer_resume(void);
+void xen_arch_resume(void);
+void xen_arch_suspend(void);
+
+void xen_resume_notifier_register(struct notifier_block *nb);
+void xen_resume_notifier_unregister(struct notifier_block *nb);
+
+int xen_setup_shutdown_event(void);
+
+extern unsigned long *xen_contiguous_bitmap;
+int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
+ unsigned int address_bits,
+ dma_addr_t *dma_handle);
+
+void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
+
+struct vm_area_struct;
+
+/*
+ * xen_remap_domain_mfn_array() - map an array of foreign frames
+ * @vma: VMA to map the pages into
+ * @addr: Address at which to map the pages
+ * @gfn: Array of GFNs to map
+ * @nr: Number entries in the GFN array
+ * @err_ptr: Returns per-GFN error status.
+ * @prot: page protection mask
+ * @domid: Domain owning the pages
+ * @pages: Array of pages if this domain has an auto-translated physmap
+ *
+ * @gfn and @err_ptr may point to the same buffer, the GFNs will be
+ * overwritten by the error codes after they are mapped.
+ *
+ * Returns the number of successfully mapped frames, or a -ve error
+ * code.
+ */
+int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
+ unsigned long addr,
+ xen_pfn_t *gfn, int nr,
+ int *err_ptr, pgprot_t prot,
+ unsigned domid,
+ struct page **pages);
+
+/* xen_remap_domain_mfn_range() - map a range of foreign frames
+ * @vma: VMA to map the pages into
+ * @addr: Address at which to map the pages
+ * @gfn: First GFN to map.
+ * @nr: Number frames to map
+ * @prot: page protection mask
+ * @domid: Domain owning the pages
+ * @pages: Array of pages if this domain has an auto-translated physmap
+ *
+ * Returns the number of successfully mapped frames, or a -ve error
+ * code.
+ */
+int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
+ unsigned long addr,
+ xen_pfn_t gfn, int nr,
+ pgprot_t prot, unsigned domid,
+ struct page **pages);
+int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
+ int numpgs, struct page **pages);
+int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
+ unsigned long addr,
+ xen_pfn_t *gfn, int nr,
+ int *err_ptr, pgprot_t prot,
+ unsigned domid,
+ struct page **pages);
+int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
+ int nr, struct page **pages);
+
+bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
+
+#ifdef CONFIG_XEN_EFI
+extern efi_system_table_t *xen_efi_probe(void);
+#else
+static inline efi_system_table_t __init *xen_efi_probe(void)
+{
+ return NULL;
+}
+#endif
+
+#ifdef CONFIG_PREEMPT
+
+static inline void xen_preemptible_hcall_begin(void)
+{
+}
+
+static inline void xen_preemptible_hcall_end(void)
+{
+}
+
+#else
+
+DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
+
+static inline void xen_preemptible_hcall_begin(void)
+{
+ __this_cpu_write(xen_in_preemptible_hcall, true);
+}
+
+static inline void xen_preemptible_hcall_end(void)
+{
+ __this_cpu_write(xen_in_preemptible_hcall, false);
+}
+
+#endif /* CONFIG_PREEMPT */
+
+#endif /* INCLUDE_XEN_OPS_H */