diff options
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/interface/memory.h | 6 | ||||
| -rw-r--r-- | include/xen/xen-ops.h | 133 |
2 files changed, 88 insertions, 51 deletions
diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index 4c5751c26f87..447004861f00 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -245,12 +245,6 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map); /* - * Prevent the balloon driver from changing the memory reservation - * during a driver critical region. - */ -extern spinlock_t xen_reservation_lock; - -/* * Unmaps the page appearing at a particular GPFN from the specified guest's * pseudophysical address space. * arg == addr of xen_remove_from_physmap_t. diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index fd18c974a619..18803ff76e27 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -5,6 +5,7 @@ #include <linux/percpu.h> #include <linux/notifier.h> #include <linux/efi.h> +#include <xen/features.h> #include <asm/xen/interface.h> #include <xen/interface/vcpu.h> @@ -47,6 +48,10 @@ int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, dma_addr_t *dma_handle); void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); + +int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, + xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, + unsigned int domid, bool no_translate, struct page **pages); #else static inline int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, @@ -58,10 +63,50 @@ static inline int xen_create_contiguous_region(phys_addr_t pstart, static inline void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order) { } + +static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, + xen_pfn_t *pfn, int nr, int *err_ptr, + pgprot_t prot, unsigned int domid, + bool no_translate, struct page **pages) +{ + BUG(); + return 0; +} #endif struct vm_area_struct; +#ifdef CONFIG_XEN_AUTO_XLATE +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 int domid, + struct page **pages); +int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, + int nr, struct page **pages); +#else +/* + * These two functions are called from arch/x86/xen/mmu.c and so stubs + * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. + */ +static inline 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 int domid, + struct page **pages) +{ + return -EOPNOTSUPP; +} + +static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, + int nr, struct page **pages) +{ + return -EOPNOTSUPP; +} +#endif + /* * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn * @vma: VMA to map the pages into @@ -79,12 +124,25 @@ struct vm_area_struct; * Returns the number of successfully mapped frames, or a -ve error * code. */ -int xen_remap_domain_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); +static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma, + unsigned long addr, + xen_pfn_t *gfn, int nr, + int *err_ptr, pgprot_t prot, + unsigned int domid, + struct page **pages) +{ + if (xen_feature(XENFEAT_auto_translated_physmap)) + return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr, + prot, domid, pages); + + /* We BUG_ON because it's a programmer error to pass a NULL err_ptr, + * and the consequences later is quite hard to detect what the actual + * cause of "wrong memory was mapped in". + */ + BUG_ON(err_ptr == NULL); + return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid, + false, pages); +} /* * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn @@ -103,10 +161,18 @@ int xen_remap_domain_gfn_array(struct vm_area_struct *vma, * 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 *mfn, int nr, - int *err_ptr, pgprot_t prot, - unsigned int domid, struct page **pages); +static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma, + unsigned long addr, xen_pfn_t *mfn, + int nr, int *err_ptr, + pgprot_t prot, unsigned int domid, + struct page **pages) +{ + if (xen_feature(XENFEAT_auto_translated_physmap)) + return -EOPNOTSUPP; + + return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid, + true, pages); +} /* xen_remap_domain_gfn_range() - map a range of foreign frames * @vma: VMA to map the pages into @@ -120,44 +186,21 @@ int xen_remap_domain_mfn_array(struct vm_area_struct *vma, * Returns the number of successfully mapped frames, or a -ve error * code. */ -int xen_remap_domain_gfn_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_gfn_range(struct vm_area_struct *vma, - int numpgs, struct page **pages); - -#ifdef CONFIG_XEN_AUTO_XLATE -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); -#else -/* - * These two functions are called from arch/x86/xen/mmu.c and so stubs - * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE. - */ -static inline 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 int domid, - struct page **pages) +static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma, + unsigned long addr, + xen_pfn_t gfn, int nr, + pgprot_t prot, unsigned int domid, + struct page **pages) { - return -EOPNOTSUPP; -} + if (xen_feature(XENFEAT_auto_translated_physmap)) + return -EOPNOTSUPP; -static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, - int nr, struct page **pages) -{ - return -EOPNOTSUPP; + return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false, + pages); } -#endif + +int xen_unmap_domain_gfn_range(struct vm_area_struct *vma, + int numpgs, struct page **pages); int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr, unsigned long nr_grant_frames); |