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r: 282080
b: refs/heads/master
c: 9dbc71d
h: refs/heads/master
v: v3
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Annie Li authored and Konrad Rzeszutek Wilk committed Dec 16, 2011
1 parent 790d504 commit ec271de
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2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 4313d88c93df8c096adde516b08f1fb2f2e8b844
refs/heads/master: 9dbc71d53ce4e0260d0a8307838cd9ebddc07a12
48 changes: 24 additions & 24 deletions trunk/drivers/xen/grant-table.c
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Expand Up @@ -76,50 +76,50 @@ static union {
/*This is a structure of function pointers for grant table*/
struct gnttab_ops {
/*
* Mapping a list of frames for storing grant entries. First input
* parameter is used to storing grant table address when grant table
* being setup, second parameter is the number of frames to map grant
* table. Returning GNTST_okay means success and negative value means
* failure.
* Mapping a list of frames for storing grant entries. Frames parameter
* is used to store grant table address when grant table being setup,
* nr_gframes is the number of frames to map grant table. Returning
* GNTST_okay means success and negative value means failure.
*/
int (*map_frames)(unsigned long *, unsigned int);
int (*map_frames)(unsigned long *frames, unsigned int nr_gframes);
/*
* Release a list of frames which are mapped in map_frames for grant
* entry status.
*/
void (*unmap_frames)(void);
/*
* Introducing a valid entry into the grant table, granting the frame
* of this grant entry to domain for accessing, or transfering, or
* transitively accessing. First input parameter is reference of this
* introduced grant entry, second one is domid of granted domain, third
* one is the frame to be granted, and the last one is status of the
* grant entry to be updated.
* Introducing a valid entry into the grant table, granting the frame of
* this grant entry to domain for accessing or transfering. Ref
* parameter is reference of this introduced grant entry, domid is id of
* granted domain, frame is the page frame to be granted, and flags is
* status of the grant entry to be updated.
*/
void (*update_entry)(grant_ref_t, domid_t, unsigned long, unsigned);
void (*update_entry)(grant_ref_t ref, domid_t domid,
unsigned long frame, unsigned flags);
/*
* Stop granting a grant entry to domain for accessing. First input
* parameter is reference of a grant entry whose grant access will be
* stopped, second one is not in use now. If the grant entry is
* Stop granting a grant entry to domain for accessing. Ref parameter is
* reference of a grant entry whose grant access will be stopped,
* readonly is not in use in this function. If the grant entry is
* currently mapped for reading or writing, just return failure(==0)
* directly and don't tear down the grant access. Otherwise, stop grant
* access for this entry and return success(==1).
*/
int (*end_foreign_access_ref)(grant_ref_t, int);
int (*end_foreign_access_ref)(grant_ref_t ref, int readonly);
/*
* Stop granting a grant entry to domain for transfer. If tranfer has
* not started, just reclaim the grant entry and return failure(==0).
* Otherwise, wait for the transfer to complete and then return the
* frame.
* Stop granting a grant entry to domain for transfer. Ref parameter is
* reference of a grant entry whose grant transfer will be stopped. If
* tranfer has not started, just reclaim the grant entry and return
* failure(==0). Otherwise, wait for the transfer to complete and then
* return the frame.
*/
unsigned long (*end_foreign_transfer_ref)(grant_ref_t);
unsigned long (*end_foreign_transfer_ref)(grant_ref_t ref);
/*
* Query the status of a grant entry. Input parameter is reference of
* Query the status of a grant entry. Ref parameter is reference of
* queried grant entry, return value is the status of queried entry.
* Detailed status(writing/reading) can be gotten from the return value
* by bit operations.
*/
int (*query_foreign_access)(grant_ref_t);
int (*query_foreign_access)(grant_ref_t ref);
};

static struct gnttab_ops *gnttab_interface;
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