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Merge branch 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

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* 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: (37 commits)
  xen/pciback: Expand the warning message to include domain id.
  xen/pciback: Fix "device has been assigned to X domain!" warning
  xen/pciback: Move the PCI_DEV_FLAGS_ASSIGNED ops to the "[un|]bind"
  xen/xenbus: don't reimplement kvasprintf via a fixed size buffer
  xenbus: maximum buffer size is XENSTORE_PAYLOAD_MAX
  xen/xenbus: Reject replies with payload > XENSTORE_PAYLOAD_MAX.
  Xen: consolidate and simplify struct xenbus_driver instantiation
  xen-gntalloc: introduce missing kfree
  xen/xenbus: Fix compile error - missing header for xen_initial_domain()
  xen/netback: Enable netback on HVM guests
  xen/grant-table: Support mappings required by blkback
  xenbus: Use grant-table wrapper functions
  xenbus: Support HVM backends
  xen/xenbus-frontend: Fix compile error with randconfig
  xen/xenbus-frontend: Make error message more clear
  xen/privcmd: Remove unused support for arch specific privcmp mmap
  xen: Add xenbus_backend device
  xen: Add xenbus device driver
  xen: Add privcmd device driver
  xen/gntalloc: fix reference counts on multi-page mappings
  ...
This commit is contained in:
Linus Torvalds
2012-01-10 10:09:59 -08:00
parent ae5cfc0546 6c254de16a
commit 90160371b3
44 changed files with 1516 additions and 268 deletions
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169
include/xen/interface/grant_table.h
View File

@@ -84,13 +84,23 @@
* Use SMP-safe bit-setting instruction.
*/
/*
* Reference to a grant entry in a specified domain's grant table.
*/
typedef uint32_t grant_ref_t;
/*
* A grant table comprises a packed array of grant entries in one or more
* page frames shared between Xen and a guest.
* [XEN]: This field is written by Xen and read by the sharing guest.
* [GST]: This field is written by the guest and read by Xen.
*/
struct grant_entry {
/*
* Version 1 of the grant table entry structure is maintained purely
* for backwards compatibility. New guests should use version 2.
*/
struct grant_entry_v1 {
/* GTF_xxx: various type and flag information. [XEN,GST] */
uint16_t flags;
/* The domain being granted foreign privileges. [GST] */
@@ -108,10 +118,13 @@ struct grant_entry {
* GTF_permit_access: Allow @domid to map/access @frame.
* GTF_accept_transfer: Allow @domid to transfer ownership of one page frame
* to this guest. Xen writes the page number to @frame.
* GTF_transitive: Allow @domid to transitively access a subrange of
* @trans_grant in @trans_domid. No mappings are allowed.
*/
#define GTF_invalid (0U<<0)
#define GTF_permit_access (1U<<0)
#define GTF_accept_transfer (2U<<0)
#define GTF_transitive (3U<<0)
#define GTF_type_mask (3U<<0)
/*
@@ -119,6 +132,9 @@ struct grant_entry {
* GTF_readonly: Restrict @domid to read-only mappings and accesses. [GST]
* GTF_reading: Grant entry is currently mapped for reading by @domid. [XEN]
* GTF_writing: Grant entry is currently mapped for writing by @domid. [XEN]
* GTF_sub_page: Grant access to only a subrange of the page. @domid
* will only be allowed to copy from the grant, and not
* map it. [GST]
*/
#define _GTF_readonly (2)
#define GTF_readonly (1U<<_GTF_readonly)
@@ -126,6 +142,8 @@ struct grant_entry {
#define GTF_reading (1U<<_GTF_reading)
#define _GTF_writing (4)
#define GTF_writing (1U<<_GTF_writing)
#define _GTF_sub_page (8)
#define GTF_sub_page (1U<<_GTF_sub_page)
/*
* Subflags for GTF_accept_transfer:
@@ -142,16 +160,82 @@ struct grant_entry {
#define _GTF_transfer_completed (3)
#define GTF_transfer_completed (1U<<_GTF_transfer_completed)
/*
* Version 2 grant table entries. These fulfil the same role as
* version 1 entries, but can represent more complicated operations.
* Any given domain will have either a version 1 or a version 2 table,
* and every entry in the table will be the same version.
*
* The interface by which domains use grant references does not depend
* on the grant table version in use by the other domain.
*/
/*
* Version 1 and version 2 grant entries share a common prefix. The
* fields of the prefix are documented as part of struct
* grant_entry_v1.
*/
struct grant_entry_header {
uint16_t flags;
domid_t domid;
};
/*
* Version 2 of the grant entry structure, here is an union because three
* different types are suppotted: full_page, sub_page and transitive.
*/
union grant_entry_v2 {
struct grant_entry_header hdr;
/*
* This member is used for V1-style full page grants, where either:
*
* -- hdr.type is GTF_accept_transfer, or
* -- hdr.type is GTF_permit_access and GTF_sub_page is not set.
*
* In that case, the frame field has the same semantics as the
* field of the same name in the V1 entry structure.
*/
struct {
struct grant_entry_header hdr;
uint32_t pad0;
uint64_t frame;
} full_page;
/*
* If the grant type is GTF_grant_access and GTF_sub_page is set,
* @domid is allowed to access bytes [@page_off,@page_off+@length)
* in frame @frame.
*/
struct {
struct grant_entry_header hdr;
uint16_t page_off;
uint16_t length;
uint64_t frame;
} sub_page;
/*
* If the grant is GTF_transitive, @domid is allowed to use the
* grant @gref in domain @trans_domid, as if it was the local
* domain. Obviously, the transitive access must be compatible
* with the original grant.
*/
struct {
struct grant_entry_header hdr;
domid_t trans_domid;
uint16_t pad0;
grant_ref_t gref;
} transitive;
uint32_t __spacer[4]; /* Pad to a power of two */
};
typedef uint16_t grant_status_t;
/***********************************
* GRANT TABLE QUERIES AND USES
*/
/*
* Reference to a grant entry in a specified domain's grant table.
*/
typedef uint32_t grant_ref_t;
/*
* Handle to track a mapping created via a grant reference.
*/
@@ -321,6 +405,79 @@ struct gnttab_query_size {
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_size);
/*
* GNTTABOP_unmap_and_replace: Destroy one or more grant-reference mappings
* tracked by <handle> but atomically replace the page table entry with one
* pointing to the machine address under <new_addr>. <new_addr> will be
* redirected to the null entry.
* NOTES:
* 1. The call may fail in an undefined manner if either mapping is not
* tracked by <handle>.
* 2. After executing a batch of unmaps, it is guaranteed that no stale
* mappings will remain in the device or host TLBs.
*/
#define GNTTABOP_unmap_and_replace 7
struct gnttab_unmap_and_replace {
/* IN parameters. */
uint64_t host_addr;
uint64_t new_addr;
grant_handle_t handle;
/* OUT parameters. */
int16_t status; /* GNTST_* */
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_and_replace);
/*
* GNTTABOP_set_version: Request a particular version of the grant
* table shared table structure. This operation can only be performed
* once in any given domain. It must be performed before any grants
* are activated; otherwise, the domain will be stuck with version 1.
* The only defined versions are 1 and 2.
*/
#define GNTTABOP_set_version 8
struct gnttab_set_version {
/* IN parameters */
uint32_t version;
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_set_version);
/*
* GNTTABOP_get_status_frames: Get the list of frames used to store grant
* status for <dom>. In grant format version 2, the status is separated
* from the other shared grant fields to allow more efficient synchronization
* using barriers instead of atomic cmpexch operations.
* <nr_frames> specify the size of vector <frame_list>.
* The frame addresses are returned in the <frame_list>.
* Only <nr_frames> addresses are returned, even if the table is larger.
* NOTES:
* 1. <dom> may be specified as DOMID_SELF.
* 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF.
*/
#define GNTTABOP_get_status_frames 9
struct gnttab_get_status_frames {
/* IN parameters. */
uint32_t nr_frames;
domid_t dom;
/* OUT parameters. */
int16_t status; /* GNTST_* */
GUEST_HANDLE(uint64_t) frame_list;
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_status_frames);
/*
* GNTTABOP_get_version: Get the grant table version which is in
* effect for domain <dom>.
*/
#define GNTTABOP_get_version 10
struct gnttab_get_version {
/* IN parameters */
domid_t dom;
uint16_t pad;
/* OUT parameters */
uint32_t version;
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_version);
/*
* Bitfield values for update_pin_status.flags.
*/

3
include/xen/interface/io/xs_wire.h
View File

@@ -87,4 +87,7 @@ struct xenstore_domain_interface {
XENSTORE_RING_IDX rsp_cons, rsp_prod;
};
/* Violating this is very bad. See docs/misc/xenstore.txt. */
#define XENSTORE_PAYLOAD_MAX 4096
#endif /* _XS_WIRE_H */

2
include/xen/interface/xen.h
View File

@@ -523,6 +523,8 @@ struct tmem_op {
} u;
};
DEFINE_GUEST_HANDLE(u64);
#else /* __ASSEMBLY__ */
/* In assembly code we cannot use C numeric constant suffixes. */