1b65c4e5a9
Use xen_alloc_coherent_pages and xen_free_coherent_pages to allocate or free coherent pages. We need to be careful handling the pointer returned by xen_alloc_coherent_pages, because on ARM the pointer is not equal to phys_to_virt(*dma_handle). In fact virt_to_phys only works for kernel direct mapped RAM memory. In ARM case the pointer could be an ioremap address, therefore passing it to virt_to_phys would give you another physical address that doesn't correspond to it. Make xen_create_contiguous_region take a phys_addr_t as start parameter to avoid the virt_to_phys calls which would be incorrect. Changes in v6: - remove extra spaces. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
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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#include <asm/xen/interface.h>
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DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
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void xen_arch_pre_suspend(void);
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void xen_arch_post_suspend(int suspend_cancelled);
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void xen_arch_hvm_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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int xen_setup_shutdown_event(void);
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extern unsigned long *xen_contiguous_bitmap;
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int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
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unsigned int address_bits,
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dma_addr_t *dma_handle);
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void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
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struct vm_area_struct;
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int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
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unsigned long addr,
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xen_pfn_t mfn, int nr,
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pgprot_t prot, unsigned domid,
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struct page **pages);
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int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
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int numpgs, struct page **pages);
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bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
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#endif /* INCLUDE_XEN_OPS_H */
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