diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/memory_hotplug.h | 2 | ||||
| -rw-r--r-- | include/uapi/xen/gntalloc.h | 22 | ||||
| -rw-r--r-- | include/uapi/xen/gntdev.h | 34 | ||||
| -rw-r--r-- | include/xen/balloon.h | 12 | ||||
| -rw-r--r-- | include/xen/grant_table.h | 57 | ||||
| -rw-r--r-- | include/xen/page.h | 27 | ||||
| -rw-r--r-- | include/xen/xenbus.h | 4 |
7 files changed, 120 insertions, 38 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 8f60e899b33c..2ea574ff9714 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -11,6 +11,7 @@ struct zone; struct pglist_data; struct mem_section; struct memory_block; +struct resource; #ifdef CONFIG_MEMORY_HOTPLUG @@ -266,6 +267,7 @@ static inline void remove_memory(int nid, u64 start, u64 size) {} extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, void *arg, int (*func)(struct memory_block *, void *)); extern int add_memory(int nid, u64 start, u64 size); +extern int add_memory_resource(int nid, struct resource *resource); extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default, bool for_device); extern int arch_add_memory(int nid, u64 start, u64 size, bool for_device); diff --git a/include/uapi/xen/gntalloc.h b/include/uapi/xen/gntalloc.h index 76bd58065f4f..48d2790ef928 100644 --- a/include/uapi/xen/gntalloc.h +++ b/include/uapi/xen/gntalloc.h @@ -11,6 +11,8 @@ #ifndef __LINUX_PUBLIC_GNTALLOC_H__ #define __LINUX_PUBLIC_GNTALLOC_H__ +#include <linux/types.h> + /* * Allocates a new page and creates a new grant reference. */ @@ -19,17 +21,17 @@ _IOC(_IOC_NONE, 'G', 5, sizeof(struct ioctl_gntalloc_alloc_gref)) struct ioctl_gntalloc_alloc_gref { /* IN parameters */ /* The ID of the domain to be given access to the grants. */ - uint16_t domid; + __u16 domid; /* Flags for this mapping */ - uint16_t flags; + __u16 flags; /* Number of pages to map */ - uint32_t count; + __u32 count; /* OUT parameters */ /* The offset to be used on a subsequent call to mmap(). */ - uint64_t index; + __u64 index; /* The grant references of the newly created grant, one per page */ /* Variable size, depending on count */ - uint32_t gref_ids[1]; + __u32 gref_ids[1]; }; #define GNTALLOC_FLAG_WRITABLE 1 @@ -43,9 +45,9 @@ _IOC(_IOC_NONE, 'G', 6, sizeof(struct ioctl_gntalloc_dealloc_gref)) struct ioctl_gntalloc_dealloc_gref { /* IN parameters */ /* The offset returned in the map operation */ - uint64_t index; + __u64 index; /* Number of references to unmap */ - uint32_t count; + __u32 count; }; /* @@ -67,11 +69,11 @@ struct ioctl_gntalloc_unmap_notify { * be cleared. Otherwise, it can be any byte in the page whose * notification we are adjusting. */ - uint64_t index; + __u64 index; /* Action(s) to take on unmap */ - uint32_t action; + __u32 action; /* Event channel to notify */ - uint32_t event_channel_port; + __u32 event_channel_port; }; /* Clear (set to zero) the byte specified by index */ diff --git a/include/uapi/xen/gntdev.h b/include/uapi/xen/gntdev.h index 5304bd3c84c5..aa7610a9b867 100644 --- a/include/uapi/xen/gntdev.h +++ b/include/uapi/xen/gntdev.h @@ -33,11 +33,13 @@ #ifndef __LINUX_PUBLIC_GNTDEV_H__ #define __LINUX_PUBLIC_GNTDEV_H__ +#include <linux/types.h> + struct ioctl_gntdev_grant_ref { /* The domain ID of the grant to be mapped. */ - uint32_t domid; + __u32 domid; /* The grant reference of the grant to be mapped. */ - uint32_t ref; + __u32 ref; }; /* @@ -50,11 +52,11 @@ _IOC(_IOC_NONE, 'G', 0, sizeof(struct ioctl_gntdev_map_grant_ref)) struct ioctl_gntdev_map_grant_ref { /* IN parameters */ /* The number of grants to be mapped. */ - uint32_t count; - uint32_t pad; + __u32 count; + __u32 pad; /* OUT parameters */ /* The offset to be used on a subsequent call to mmap(). */ - uint64_t index; + __u64 index; /* Variable IN parameter. */ /* Array of grant references, of size @count. */ struct ioctl_gntdev_grant_ref refs[1]; @@ -70,10 +72,10 @@ _IOC(_IOC_NONE, 'G', 1, sizeof(struct ioctl_gntdev_unmap_grant_ref)) struct ioctl_gntdev_unmap_grant_ref { /* IN parameters */ /* The offset was returned by the corresponding map operation. */ - uint64_t index; + __u64 index; /* The number of pages to be unmapped. */ - uint32_t count; - uint32_t pad; + __u32 count; + __u32 pad; }; /* @@ -93,13 +95,13 @@ _IOC(_IOC_NONE, 'G', 2, sizeof(struct ioctl_gntdev_get_offset_for_vaddr)) struct ioctl_gntdev_get_offset_for_vaddr { /* IN parameters */ /* The virtual address of the first mapped page in a range. */ - uint64_t vaddr; + __u64 vaddr; /* OUT parameters */ /* The offset that was used in the initial mmap() operation. */ - uint64_t offset; + __u64 offset; /* The number of pages mapped in the VM area that begins at @vaddr. */ - uint32_t count; - uint32_t pad; + __u32 count; + __u32 pad; }; /* @@ -113,7 +115,7 @@ _IOC(_IOC_NONE, 'G', 3, sizeof(struct ioctl_gntdev_set_max_grants)) struct ioctl_gntdev_set_max_grants { /* IN parameter */ /* The maximum number of grants that may be mapped at once. */ - uint32_t count; + __u32 count; }; /* @@ -135,11 +137,11 @@ struct ioctl_gntdev_unmap_notify { * be cleared. Otherwise, it can be any byte in the page whose * notification we are adjusting. */ - uint64_t index; + __u64 index; /* Action(s) to take on unmap */ - uint32_t action; + __u32 action; /* Event channel to notify */ - uint32_t event_channel_port; + __u32 event_channel_port; }; /* Clear (set to zero) the byte specified by index */ diff --git a/include/xen/balloon.h b/include/xen/balloon.h index a4c1c6a93691..d1767dfb0d95 100644 --- a/include/xen/balloon.h +++ b/include/xen/balloon.h @@ -8,30 +8,24 @@ struct balloon_stats { /* We aim for 'current allocation' == 'target allocation'. */ unsigned long current_pages; unsigned long target_pages; + unsigned long target_unpopulated; /* Number of pages in high- and low-memory balloons. */ unsigned long balloon_low; unsigned long balloon_high; + unsigned long total_pages; unsigned long schedule_delay; unsigned long max_schedule_delay; unsigned long retry_count; unsigned long max_retry_count; -#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG - unsigned long hotplug_pages; - unsigned long balloon_hotplug; -#endif }; extern struct balloon_stats balloon_stats; void balloon_set_new_target(unsigned long target); -int alloc_xenballooned_pages(int nr_pages, struct page **pages, - bool highmem); +int alloc_xenballooned_pages(int nr_pages, struct page **pages); void free_xenballooned_pages(int nr_pages, struct page **pages); -struct page *get_balloon_scratch_page(void); -void put_balloon_scratch_page(void); - struct device; #ifdef CONFIG_XEN_SELFBALLOONING extern int register_xen_selfballooning(struct device *dev); diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h index 4478f4b4aae2..34b1379f9777 100644 --- a/include/xen/grant_table.h +++ b/include/xen/grant_table.h @@ -45,8 +45,10 @@ #include <asm/xen/hypervisor.h> #include <xen/features.h> +#include <xen/page.h> #include <linux/mm_types.h> #include <linux/page-flags.h> +#include <linux/kernel.h> #define GNTTAB_RESERVED_XENSTORE 1 @@ -129,6 +131,15 @@ void gnttab_cancel_free_callback(struct gnttab_free_callback *callback); void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid, unsigned long frame, int readonly); +/* Give access to the first 4K of the page */ +static inline void gnttab_page_grant_foreign_access_ref_one( + grant_ref_t ref, domid_t domid, + struct page *page, int readonly) +{ + gnttab_grant_foreign_access_ref(ref, domid, xen_page_to_gfn(page), + readonly); +} + void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid, unsigned long pfn); @@ -224,4 +235,50 @@ static inline struct xen_page_foreign *xen_page_foreign(struct page *page) #endif } +/* Split Linux page in chunk of the size of the grant and call fn + * + * Parameters of fn: + * gfn: guest frame number + * offset: offset in the grant + * len: length of the data in the grant. + * data: internal information + */ +typedef void (*xen_grant_fn_t)(unsigned long gfn, unsigned int offset, + unsigned int len, void *data); + +void gnttab_foreach_grant_in_range(struct page *page, + unsigned int offset, + unsigned int len, + xen_grant_fn_t fn, + void *data); + +/* Helper to get to call fn only on the first "grant chunk" */ +static inline void gnttab_for_one_grant(struct page *page, unsigned int offset, + unsigned len, xen_grant_fn_t fn, + void *data) +{ + /* The first request is limited to the size of one grant */ + len = min_t(unsigned int, XEN_PAGE_SIZE - (offset & ~XEN_PAGE_MASK), + len); + + gnttab_foreach_grant_in_range(page, offset, len, fn, data); +} + +/* Get @nr_grefs grants from an array of page and call fn for each grant */ +void gnttab_foreach_grant(struct page **pages, + unsigned int nr_grefs, + xen_grant_fn_t fn, + void *data); + +/* Get the number of grant in a specified region + * + * start: Offset from the beginning of the first page + * len: total length of data (can cross multiple page) + */ +static inline unsigned int gnttab_count_grant(unsigned int start, + unsigned int len) +{ + return XEN_PFN_UP(xen_offset_in_page(start) + len); +} + #endif /* __ASM_GNTTAB_H__ */ diff --git a/include/xen/page.h b/include/xen/page.h index 1daae485e336..96294ac93755 100644 --- a/include/xen/page.h +++ b/include/xen/page.h @@ -1,11 +1,36 @@ #ifndef _XEN_PAGE_H #define _XEN_PAGE_H +#include <asm/page.h> + +/* The hypercall interface supports only 4KB page */ +#define XEN_PAGE_SHIFT 12 +#define XEN_PAGE_SIZE (_AC(1, UL) << XEN_PAGE_SHIFT) +#define XEN_PAGE_MASK (~(XEN_PAGE_SIZE-1)) +#define xen_offset_in_page(p) ((unsigned long)(p) & ~XEN_PAGE_MASK) + +/* + * We assume that PAGE_SIZE is a multiple of XEN_PAGE_SIZE + * XXX: Add a BUILD_BUG_ON? + */ + +#define xen_pfn_to_page(xen_pfn) \ + ((pfn_to_page(((unsigned long)(xen_pfn) << XEN_PAGE_SHIFT) >> PAGE_SHIFT))) +#define page_to_xen_pfn(page) \ + (((page_to_pfn(page)) << PAGE_SHIFT) >> XEN_PAGE_SHIFT) + +#define XEN_PFN_PER_PAGE (PAGE_SIZE / XEN_PAGE_SIZE) + +#define XEN_PFN_DOWN(x) ((x) >> XEN_PAGE_SHIFT) +#define XEN_PFN_UP(x) (((x) + XEN_PAGE_SIZE-1) >> XEN_PAGE_SHIFT) +#define XEN_PFN_PHYS(x) ((phys_addr_t)(x) << XEN_PAGE_SHIFT) + #include <asm/xen/page.h> +/* Return the GFN associated to the first 4KB of the page */ static inline unsigned long xen_page_to_gfn(struct page *page) { - return pfn_to_gfn(page_to_pfn(page)); + return pfn_to_gfn(page_to_xen_pfn(page)); } struct xen_memory_region { diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h index 289c0b5f08fe..32b944b7cebd 100644 --- a/include/xen/xenbus.h +++ b/include/xen/xenbus.h @@ -46,8 +46,8 @@ #include <xen/interface/io/xenbus.h> #include <xen/interface/io/xs_wire.h> -#define XENBUS_MAX_RING_PAGE_ORDER 4 -#define XENBUS_MAX_RING_PAGES (1U << XENBUS_MAX_RING_PAGE_ORDER) +#define XENBUS_MAX_RING_GRANT_ORDER 4 +#define XENBUS_MAX_RING_GRANTS (1U << XENBUS_MAX_RING_GRANT_ORDER) #define INVALID_GRANT_HANDLE (~0U) /* Register callback to watch this node. */ |