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A memory region must be physically contiguous in order to be accessed through DMA. This patch adds xen_create_contiguous_region, which ensures a region of contiguous virtual memory is also physically contiguous. Based on Stephen Tweedie's port of the 2.6.18-xen version. Remove contiguous_bitmap[] as it's no longer needed. Ported from linux-2.6.18-xen.hg 707:e410857fd83c [ Impact: add Xen-internal API to make pages phys-contig ] Signed-off-by: Alex Nixon <alex.nixon@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
24 lines
581 B
C
24 lines
581 B
C
#ifndef INCLUDE_XEN_OPS_H
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#define INCLUDE_XEN_OPS_H
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#include <linux/percpu.h>
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DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
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void xen_pre_suspend(void);
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void xen_post_suspend(int suspend_cancelled);
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void xen_mm_pin_all(void);
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void xen_mm_unpin_all(void);
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void xen_timer_resume(void);
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void xen_arch_resume(void);
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extern unsigned long *xen_contiguous_bitmap;
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int xen_create_contiguous_region(unsigned long vstart, unsigned int order,
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unsigned int address_bits);
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void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);
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#endif /* INCLUDE_XEN_OPS_H */
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