xref: /openbmc/qemu/include/hw/xen/interface/xen.h (revision 8ac98aed)
1 /* SPDX-License-Identifier: MIT */
2 /******************************************************************************
3  * xen.h
4  *
5  * Guest OS interface to Xen.
6  *
7  * Copyright (c) 2004, K A Fraser
8  */
9 
10 #ifndef __XEN_PUBLIC_XEN_H__
11 #define __XEN_PUBLIC_XEN_H__
12 
13 #include "xen-compat.h"
14 
15 #if defined(__i386__) || defined(__x86_64__)
16 #include "arch-x86/xen.h"
17 #elif defined(__arm__) || defined (__aarch64__)
18 #include "arch-arm.h"
19 #else
20 #error "Unsupported architecture"
21 #endif
22 
23 #ifndef __ASSEMBLY__
24 /* Guest handles for primitive C types. */
25 DEFINE_XEN_GUEST_HANDLE(char);
26 __DEFINE_XEN_GUEST_HANDLE(uchar, unsigned char);
27 DEFINE_XEN_GUEST_HANDLE(int);
28 __DEFINE_XEN_GUEST_HANDLE(uint,  unsigned int);
29 #if __XEN_INTERFACE_VERSION__ < 0x00040300
30 DEFINE_XEN_GUEST_HANDLE(long);
31 __DEFINE_XEN_GUEST_HANDLE(ulong, unsigned long);
32 #endif
33 DEFINE_XEN_GUEST_HANDLE(void);
34 
35 DEFINE_XEN_GUEST_HANDLE(uint64_t);
36 DEFINE_XEN_GUEST_HANDLE(xen_pfn_t);
37 DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
38 
39 /* Define a variable length array (depends on compiler). */
40 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
41 #define XEN_FLEX_ARRAY_DIM
42 #elif defined(__GNUC__)
43 #define XEN_FLEX_ARRAY_DIM  0
44 #else
45 #define XEN_FLEX_ARRAY_DIM  1 /* variable size */
46 #endif
47 
48 /* Turn a plain number into a C unsigned (long (long)) constant. */
49 #define __xen_mk_uint(x)  x ## U
50 #define __xen_mk_ulong(x) x ## UL
51 #ifndef __xen_mk_ullong
52 # define __xen_mk_ullong(x) x ## ULL
53 #endif
54 #define xen_mk_uint(x)    __xen_mk_uint(x)
55 #define xen_mk_ulong(x)   __xen_mk_ulong(x)
56 #define xen_mk_ullong(x)  __xen_mk_ullong(x)
57 
58 #else
59 
60 /* In assembly code we cannot use C numeric constant suffixes. */
61 #define xen_mk_uint(x)   x
62 #define xen_mk_ulong(x)  x
63 #define xen_mk_ullong(x) x
64 
65 #endif
66 
67 /*
68  * HYPERCALLS
69  */
70 
71 /* `incontents 100 hcalls List of hypercalls
72  * ` enum hypercall_num { // __HYPERVISOR_* => HYPERVISOR_*()
73  */
74 
75 #define __HYPERVISOR_set_trap_table        0
76 #define __HYPERVISOR_mmu_update            1
77 #define __HYPERVISOR_set_gdt               2
78 #define __HYPERVISOR_stack_switch          3
79 #define __HYPERVISOR_set_callbacks         4
80 #define __HYPERVISOR_fpu_taskswitch        5
81 #define __HYPERVISOR_sched_op_compat       6 /* compat since 0x00030101 */
82 #define __HYPERVISOR_platform_op           7
83 #define __HYPERVISOR_set_debugreg          8
84 #define __HYPERVISOR_get_debugreg          9
85 #define __HYPERVISOR_update_descriptor    10
86 #define __HYPERVISOR_memory_op            12
87 #define __HYPERVISOR_multicall            13
88 #define __HYPERVISOR_update_va_mapping    14
89 #define __HYPERVISOR_set_timer_op         15
90 #define __HYPERVISOR_event_channel_op_compat 16 /* compat since 0x00030202 */
91 #define __HYPERVISOR_xen_version          17
92 #define __HYPERVISOR_console_io           18
93 #define __HYPERVISOR_physdev_op_compat    19 /* compat since 0x00030202 */
94 #define __HYPERVISOR_grant_table_op       20
95 #define __HYPERVISOR_vm_assist            21
96 #define __HYPERVISOR_update_va_mapping_otherdomain 22
97 #define __HYPERVISOR_iret                 23 /* x86 only */
98 #define __HYPERVISOR_vcpu_op              24
99 #define __HYPERVISOR_set_segment_base     25 /* x86/64 only */
100 #define __HYPERVISOR_mmuext_op            26
101 #define __HYPERVISOR_xsm_op               27
102 #define __HYPERVISOR_nmi_op               28
103 #define __HYPERVISOR_sched_op             29
104 #define __HYPERVISOR_callback_op          30
105 #define __HYPERVISOR_xenoprof_op          31
106 #define __HYPERVISOR_event_channel_op     32
107 #define __HYPERVISOR_physdev_op           33
108 #define __HYPERVISOR_hvm_op               34
109 #define __HYPERVISOR_sysctl               35
110 #define __HYPERVISOR_domctl               36
111 #define __HYPERVISOR_kexec_op             37
112 #define __HYPERVISOR_tmem_op              38
113 #define __HYPERVISOR_argo_op              39
114 #define __HYPERVISOR_xenpmu_op            40
115 #define __HYPERVISOR_dm_op                41
116 #define __HYPERVISOR_hypfs_op             42
117 
118 /* Architecture-specific hypercall definitions. */
119 #define __HYPERVISOR_arch_0               48
120 #define __HYPERVISOR_arch_1               49
121 #define __HYPERVISOR_arch_2               50
122 #define __HYPERVISOR_arch_3               51
123 #define __HYPERVISOR_arch_4               52
124 #define __HYPERVISOR_arch_5               53
125 #define __HYPERVISOR_arch_6               54
126 #define __HYPERVISOR_arch_7               55
127 
128 /* ` } */
129 
130 /*
131  * HYPERCALL COMPATIBILITY.
132  */
133 
134 /* New sched_op hypercall introduced in 0x00030101. */
135 #if __XEN_INTERFACE_VERSION__ < 0x00030101
136 #undef __HYPERVISOR_sched_op
137 #define __HYPERVISOR_sched_op __HYPERVISOR_sched_op_compat
138 #endif
139 
140 /* New event-channel and physdev hypercalls introduced in 0x00030202. */
141 #if __XEN_INTERFACE_VERSION__ < 0x00030202
142 #undef __HYPERVISOR_event_channel_op
143 #define __HYPERVISOR_event_channel_op __HYPERVISOR_event_channel_op_compat
144 #undef __HYPERVISOR_physdev_op
145 #define __HYPERVISOR_physdev_op __HYPERVISOR_physdev_op_compat
146 #endif
147 
148 /* New platform_op hypercall introduced in 0x00030204. */
149 #if __XEN_INTERFACE_VERSION__ < 0x00030204
150 #define __HYPERVISOR_dom0_op __HYPERVISOR_platform_op
151 #endif
152 
153 /*
154  * VIRTUAL INTERRUPTS
155  *
156  * Virtual interrupts that a guest OS may receive from Xen.
157  *
158  * In the side comments, 'V.' denotes a per-VCPU VIRQ while 'G.' denotes a
159  * global VIRQ. The former can be bound once per VCPU and cannot be re-bound.
160  * The latter can be allocated only once per guest: they must initially be
161  * allocated to VCPU0 but can subsequently be re-bound.
162  */
163 /* ` enum virq { */
164 #define VIRQ_TIMER      0  /* V. Timebase update, and/or requested timeout.  */
165 #define VIRQ_DEBUG      1  /* V. Request guest to dump debug info.           */
166 #define VIRQ_CONSOLE    2  /* G. (DOM0) Bytes received on emergency console. */
167 #define VIRQ_DOM_EXC    3  /* G. (DOM0) Exceptional event for some domain.   */
168 #define VIRQ_TBUF       4  /* G. (DOM0) Trace buffer has records available.  */
169 #define VIRQ_DEBUGGER   6  /* G. (DOM0) A domain has paused for debugging.   */
170 #define VIRQ_XENOPROF   7  /* V. XenOprofile interrupt: new sample available */
171 #define VIRQ_CON_RING   8  /* G. (DOM0) Bytes received on console            */
172 #define VIRQ_PCPU_STATE 9  /* G. (DOM0) PCPU state changed                   */
173 #define VIRQ_MEM_EVENT  10 /* G. (DOM0) A memory event has occurred          */
174 #define VIRQ_ARGO       11 /* G. Argo interdomain message notification       */
175 #define VIRQ_ENOMEM     12 /* G. (DOM0) Low on heap memory       */
176 #define VIRQ_XENPMU     13 /* V.  PMC interrupt                              */
177 
178 /* Architecture-specific VIRQ definitions. */
179 #define VIRQ_ARCH_0    16
180 #define VIRQ_ARCH_1    17
181 #define VIRQ_ARCH_2    18
182 #define VIRQ_ARCH_3    19
183 #define VIRQ_ARCH_4    20
184 #define VIRQ_ARCH_5    21
185 #define VIRQ_ARCH_6    22
186 #define VIRQ_ARCH_7    23
187 /* ` } */
188 
189 #define NR_VIRQS       24
190 
191 /*
192  * ` enum neg_errnoval
193  * ` HYPERVISOR_mmu_update(const struct mmu_update reqs[],
194  * `                       unsigned count, unsigned *done_out,
195  * `                       unsigned foreigndom)
196  * `
197  * @reqs is an array of mmu_update_t structures ((ptr, val) pairs).
198  * @count is the length of the above array.
199  * @pdone is an output parameter indicating number of completed operations
200  * @foreigndom[15:0]: FD, the expected owner of data pages referenced in this
201  *                    hypercall invocation. Can be DOMID_SELF.
202  * @foreigndom[31:16]: PFD, the expected owner of pagetable pages referenced
203  *                     in this hypercall invocation. The value of this field
204  *                     (x) encodes the PFD as follows:
205  *                     x == 0 => PFD == DOMID_SELF
206  *                     x != 0 => PFD == x - 1
207  *
208  * Sub-commands: ptr[1:0] specifies the appropriate MMU_* command.
209  * -------------
210  * ptr[1:0] == MMU_NORMAL_PT_UPDATE:
211  * Updates an entry in a page table belonging to PFD. If updating an L1 table,
212  * and the new table entry is valid/present, the mapped frame must belong to
213  * FD. If attempting to map an I/O page then the caller assumes the privilege
214  * of the FD.
215  * FD == DOMID_IO: Permit /only/ I/O mappings, at the priv level of the caller.
216  * FD == DOMID_XEN: Map restricted areas of Xen's heap space.
217  * ptr[:2]  -- Machine address of the page-table entry to modify.
218  * val      -- Value to write.
219  *
220  * There also certain implicit requirements when using this hypercall. The
221  * pages that make up a pagetable must be mapped read-only in the guest.
222  * This prevents uncontrolled guest updates to the pagetable. Xen strictly
223  * enforces this, and will disallow any pagetable update which will end up
224  * mapping pagetable page RW, and will disallow using any writable page as a
225  * pagetable. In practice it means that when constructing a page table for a
226  * process, thread, etc, we MUST be very dilligient in following these rules:
227  *  1). Start with top-level page (PGD or in Xen language: L4). Fill out
228  *      the entries.
229  *  2). Keep on going, filling out the upper (PUD or L3), and middle (PMD
230  *      or L2).
231  *  3). Start filling out the PTE table (L1) with the PTE entries. Once
232  *  	done, make sure to set each of those entries to RO (so writeable bit
233  *  	is unset). Once that has been completed, set the PMD (L2) for this
234  *  	PTE table as RO.
235  *  4). When completed with all of the PMD (L2) entries, and all of them have
236  *  	been set to RO, make sure to set RO the PUD (L3). Do the same
237  *  	operation on PGD (L4) pagetable entries that have a PUD (L3) entry.
238  *  5). Now before you can use those pages (so setting the cr3), you MUST also
239  *      pin them so that the hypervisor can verify the entries. This is done
240  *      via the HYPERVISOR_mmuext_op(MMUEXT_PIN_L4_TABLE, guest physical frame
241  *      number of the PGD (L4)). And this point the HYPERVISOR_mmuext_op(
242  *      MMUEXT_NEW_BASEPTR, guest physical frame number of the PGD (L4)) can be
243  *      issued.
244  * For 32-bit guests, the L4 is not used (as there is less pagetables), so
245  * instead use L3.
246  * At this point the pagetables can be modified using the MMU_NORMAL_PT_UPDATE
247  * hypercall. Also if so desired the OS can also try to write to the PTE
248  * and be trapped by the hypervisor (as the PTE entry is RO).
249  *
250  * To deallocate the pages, the operations are the reverse of the steps
251  * mentioned above. The argument is MMUEXT_UNPIN_TABLE for all levels and the
252  * pagetable MUST not be in use (meaning that the cr3 is not set to it).
253  *
254  * ptr[1:0] == MMU_MACHPHYS_UPDATE:
255  * Updates an entry in the machine->pseudo-physical mapping table.
256  * ptr[:2]  -- Machine address within the frame whose mapping to modify.
257  *             The frame must belong to the FD, if one is specified.
258  * val      -- Value to write into the mapping entry.
259  *
260  * ptr[1:0] == MMU_PT_UPDATE_PRESERVE_AD:
261  * As MMU_NORMAL_PT_UPDATE above, but A/D bits currently in the PTE are ORed
262  * with those in @val.
263  *
264  * ptr[1:0] == MMU_PT_UPDATE_NO_TRANSLATE:
265  * As MMU_NORMAL_PT_UPDATE above, but @val is not translated though FD
266  * page tables.
267  *
268  * @val is usually the machine frame number along with some attributes.
269  * The attributes by default follow the architecture defined bits. Meaning that
270  * if this is a X86_64 machine and four page table layout is used, the layout
271  * of val is:
272  *  - 63 if set means No execute (NX)
273  *  - 46-13 the machine frame number
274  *  - 12 available for guest
275  *  - 11 available for guest
276  *  - 10 available for guest
277  *  - 9 available for guest
278  *  - 8 global
279  *  - 7 PAT (PSE is disabled, must use hypercall to make 4MB or 2MB pages)
280  *  - 6 dirty
281  *  - 5 accessed
282  *  - 4 page cached disabled
283  *  - 3 page write through
284  *  - 2 userspace accessible
285  *  - 1 writeable
286  *  - 0 present
287  *
288  *  The one bits that does not fit with the default layout is the PAGE_PSE
289  *  also called PAGE_PAT). The MMUEXT_[UN]MARK_SUPER arguments to the
290  *  HYPERVISOR_mmuext_op serve as mechanism to set a pagetable to be 4MB
291  *  (or 2MB) instead of using the PAGE_PSE bit.
292  *
293  *  The reason that the PAGE_PSE (bit 7) is not being utilized is due to Xen
294  *  using it as the Page Attribute Table (PAT) bit - for details on it please
295  *  refer to Intel SDM 10.12. The PAT allows to set the caching attributes of
296  *  pages instead of using MTRRs.
297  *
298  *  The PAT MSR is as follows (it is a 64-bit value, each entry is 8 bits):
299  *                    PAT4                 PAT0
300  *  +-----+-----+----+----+----+-----+----+----+
301  *  | UC  | UC- | WC | WB | UC | UC- | WC | WB |  <= Linux
302  *  +-----+-----+----+----+----+-----+----+----+
303  *  | UC  | UC- | WT | WB | UC | UC- | WT | WB |  <= BIOS (default when machine boots)
304  *  +-----+-----+----+----+----+-----+----+----+
305  *  | rsv | rsv | WP | WC | UC | UC- | WT | WB |  <= Xen
306  *  +-----+-----+----+----+----+-----+----+----+
307  *
308  *  The lookup of this index table translates to looking up
309  *  Bit 7, Bit 4, and Bit 3 of val entry:
310  *
311  *  PAT/PSE (bit 7) ... PCD (bit 4) .. PWT (bit 3).
312  *
313  *  If all bits are off, then we are using PAT0. If bit 3 turned on,
314  *  then we are using PAT1, if bit 3 and bit 4, then PAT2..
315  *
316  *  As you can see, the Linux PAT1 translates to PAT4 under Xen. Which means
317  *  that if a guest that follows Linux's PAT setup and would like to set Write
318  *  Combined on pages it MUST use PAT4 entry. Meaning that Bit 7 (PAGE_PAT) is
319  *  set. For example, under Linux it only uses PAT0, PAT1, and PAT2 for the
320  *  caching as:
321  *
322  *   WB = none (so PAT0)
323  *   WC = PWT (bit 3 on)
324  *   UC = PWT | PCD (bit 3 and 4 are on).
325  *
326  * To make it work with Xen, it needs to translate the WC bit as so:
327  *
328  *  PWT (so bit 3 on) --> PAT (so bit 7 is on) and clear bit 3
329  *
330  * And to translate back it would:
331  *
332  * PAT (bit 7 on) --> PWT (bit 3 on) and clear bit 7.
333  */
334 #define MMU_NORMAL_PT_UPDATE       0 /* checked '*ptr = val'. ptr is MA.      */
335 #define MMU_MACHPHYS_UPDATE        1 /* ptr = MA of frame to modify entry for */
336 #define MMU_PT_UPDATE_PRESERVE_AD  2 /* atomically: *ptr = val | (*ptr&(A|D)) */
337 #define MMU_PT_UPDATE_NO_TRANSLATE 3 /* checked '*ptr = val'. ptr is MA.      */
338                                      /* val never translated.                 */
339 
340 /*
341  * MMU EXTENDED OPERATIONS
342  *
343  * ` enum neg_errnoval
344  * ` HYPERVISOR_mmuext_op(mmuext_op_t uops[],
345  * `                      unsigned int count,
346  * `                      unsigned int *pdone,
347  * `                      unsigned int foreigndom)
348  */
349 /* HYPERVISOR_mmuext_op() accepts a list of mmuext_op structures.
350  * A foreigndom (FD) can be specified (or DOMID_SELF for none).
351  * Where the FD has some effect, it is described below.
352  *
353  * cmd: MMUEXT_(UN)PIN_*_TABLE
354  * mfn: Machine frame number to be (un)pinned as a p.t. page.
355  *      The frame must belong to the FD, if one is specified.
356  *
357  * cmd: MMUEXT_NEW_BASEPTR
358  * mfn: Machine frame number of new page-table base to install in MMU.
359  *
360  * cmd: MMUEXT_NEW_USER_BASEPTR [x86/64 only]
361  * mfn: Machine frame number of new page-table base to install in MMU
362  *      when in user space.
363  *
364  * cmd: MMUEXT_TLB_FLUSH_LOCAL
365  * No additional arguments. Flushes local TLB.
366  *
367  * cmd: MMUEXT_INVLPG_LOCAL
368  * linear_addr: Linear address to be flushed from the local TLB.
369  *
370  * cmd: MMUEXT_TLB_FLUSH_MULTI
371  * vcpumask: Pointer to bitmap of VCPUs to be flushed.
372  *
373  * cmd: MMUEXT_INVLPG_MULTI
374  * linear_addr: Linear address to be flushed.
375  * vcpumask: Pointer to bitmap of VCPUs to be flushed.
376  *
377  * cmd: MMUEXT_TLB_FLUSH_ALL
378  * No additional arguments. Flushes all VCPUs' TLBs.
379  *
380  * cmd: MMUEXT_INVLPG_ALL
381  * linear_addr: Linear address to be flushed from all VCPUs' TLBs.
382  *
383  * cmd: MMUEXT_FLUSH_CACHE
384  * No additional arguments. Writes back and flushes cache contents.
385  *
386  * cmd: MMUEXT_FLUSH_CACHE_GLOBAL
387  * No additional arguments. Writes back and flushes cache contents
388  * on all CPUs in the system.
389  *
390  * cmd: MMUEXT_SET_LDT
391  * linear_addr: Linear address of LDT base (NB. must be page-aligned).
392  * nr_ents: Number of entries in LDT.
393  *
394  * cmd: MMUEXT_CLEAR_PAGE
395  * mfn: Machine frame number to be cleared.
396  *
397  * cmd: MMUEXT_COPY_PAGE
398  * mfn: Machine frame number of the destination page.
399  * src_mfn: Machine frame number of the source page.
400  *
401  * cmd: MMUEXT_[UN]MARK_SUPER
402  * mfn: Machine frame number of head of superpage to be [un]marked.
403  */
404 /* ` enum mmuext_cmd { */
405 #define MMUEXT_PIN_L1_TABLE      0
406 #define MMUEXT_PIN_L2_TABLE      1
407 #define MMUEXT_PIN_L3_TABLE      2
408 #define MMUEXT_PIN_L4_TABLE      3
409 #define MMUEXT_UNPIN_TABLE       4
410 #define MMUEXT_NEW_BASEPTR       5
411 #define MMUEXT_TLB_FLUSH_LOCAL   6
412 #define MMUEXT_INVLPG_LOCAL      7
413 #define MMUEXT_TLB_FLUSH_MULTI   8
414 #define MMUEXT_INVLPG_MULTI      9
415 #define MMUEXT_TLB_FLUSH_ALL    10
416 #define MMUEXT_INVLPG_ALL       11
417 #define MMUEXT_FLUSH_CACHE      12
418 #define MMUEXT_SET_LDT          13
419 #define MMUEXT_NEW_USER_BASEPTR 15
420 #define MMUEXT_CLEAR_PAGE       16
421 #define MMUEXT_COPY_PAGE        17
422 #define MMUEXT_FLUSH_CACHE_GLOBAL 18
423 #define MMUEXT_MARK_SUPER       19
424 #define MMUEXT_UNMARK_SUPER     20
425 /* ` } */
426 
427 #ifndef __ASSEMBLY__
428 struct mmuext_op {
429     unsigned int cmd; /* => enum mmuext_cmd */
430     union {
431         /* [UN]PIN_TABLE, NEW_BASEPTR, NEW_USER_BASEPTR
432          * CLEAR_PAGE, COPY_PAGE, [UN]MARK_SUPER */
433         xen_pfn_t     mfn;
434         /* INVLPG_LOCAL, INVLPG_ALL, SET_LDT */
435         unsigned long linear_addr;
436     } arg1;
437     union {
438         /* SET_LDT */
439         unsigned int nr_ents;
440         /* TLB_FLUSH_MULTI, INVLPG_MULTI */
441 #if __XEN_INTERFACE_VERSION__ >= 0x00030205
442         XEN_GUEST_HANDLE(const_void) vcpumask;
443 #else
444         const void *vcpumask;
445 #endif
446         /* COPY_PAGE */
447         xen_pfn_t src_mfn;
448     } arg2;
449 };
450 typedef struct mmuext_op mmuext_op_t;
451 DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
452 #endif
453 
454 /*
455  * ` enum neg_errnoval
456  * ` HYPERVISOR_update_va_mapping(unsigned long va, u64 val,
457  * `                              enum uvm_flags flags)
458  * `
459  * ` enum neg_errnoval
460  * ` HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, u64 val,
461  * `                                          enum uvm_flags flags,
462  * `                                          domid_t domid)
463  * `
464  * ` @va: The virtual address whose mapping we want to change
465  * ` @val: The new page table entry, must contain a machine address
466  * ` @flags: Control TLB flushes
467  */
468 /* These are passed as 'flags' to update_va_mapping. They can be ORed. */
469 /* When specifying UVMF_MULTI, also OR in a pointer to a CPU bitmap.   */
470 /* UVMF_LOCAL is merely UVMF_MULTI with a NULL bitmap pointer.         */
471 /* ` enum uvm_flags { */
472 #define UVMF_NONE           (xen_mk_ulong(0)<<0) /* No flushing at all.   */
473 #define UVMF_TLB_FLUSH      (xen_mk_ulong(1)<<0) /* Flush entire TLB(s).  */
474 #define UVMF_INVLPG         (xen_mk_ulong(2)<<0) /* Flush only one entry. */
475 #define UVMF_FLUSHTYPE_MASK (xen_mk_ulong(3)<<0)
476 #define UVMF_MULTI          (xen_mk_ulong(0)<<2) /* Flush subset of TLBs. */
477 #define UVMF_LOCAL          (xen_mk_ulong(0)<<2) /* Flush local TLB.      */
478 #define UVMF_ALL            (xen_mk_ulong(1)<<2) /* Flush all TLBs.       */
479 /* ` } */
480 
481 /*
482  * ` int
483  * ` HYPERVISOR_console_io(unsigned int cmd,
484  * `                       unsigned int count,
485  * `                       char buffer[]);
486  *
487  * @cmd: Command (see below)
488  * @count: Size of the buffer to read/write
489  * @buffer: Pointer in the guest memory
490  *
491  * List of commands:
492  *
493  *  * CONSOLEIO_write: Write the buffer to Xen console.
494  *      For the hardware domain, all the characters in the buffer will
495  *      be written. Characters will be printed directly to the console.
496  *      For all the other domains, only the printable characters will be
497  *      written. Characters may be buffered until a newline (i.e '\n') is
498  *      found.
499  *      @return 0 on success, otherwise return an error code.
500  *  * CONSOLEIO_read: Attempts to read up to @count characters from Xen
501  *      console. The maximum buffer size (i.e. @count) supported is 2GB.
502  *      @return the number of characters read on success, otherwise return
503  *      an error code.
504  */
505 #define CONSOLEIO_write         0
506 #define CONSOLEIO_read          1
507 
508 /*
509  * Commands to HYPERVISOR_vm_assist().
510  */
511 #define VMASST_CMD_enable                0
512 #define VMASST_CMD_disable               1
513 
514 /* x86/32 guests: simulate full 4GB segment limits. */
515 #define VMASST_TYPE_4gb_segments         0
516 
517 /* x86/32 guests: trap (vector 15) whenever above vmassist is used. */
518 #define VMASST_TYPE_4gb_segments_notify  1
519 
520 /*
521  * x86 guests: support writes to bottom-level PTEs.
522  * NB1. Page-directory entries cannot be written.
523  * NB2. Guest must continue to remove all writable mappings of PTEs.
524  */
525 #define VMASST_TYPE_writable_pagetables  2
526 
527 /* x86/PAE guests: support PDPTs above 4GB. */
528 #define VMASST_TYPE_pae_extended_cr3     3
529 
530 /*
531  * x86 guests: Sane behaviour for virtual iopl
532  *  - virtual iopl updated from do_iret() hypercalls.
533  *  - virtual iopl reported in bounce frames.
534  *  - guest kernels assumed to be level 0 for the purpose of iopl checks.
535  */
536 #define VMASST_TYPE_architectural_iopl   4
537 
538 /*
539  * All guests: activate update indicator in vcpu_runstate_info
540  * Enable setting the XEN_RUNSTATE_UPDATE flag in guest memory mapped
541  * vcpu_runstate_info during updates of the runstate information.
542  */
543 #define VMASST_TYPE_runstate_update_flag 5
544 
545 /*
546  * x86/64 guests: strictly hide M2P from user mode.
547  * This allows the guest to control respective hypervisor behavior:
548  * - when not set, L4 tables get created with the respective slot blank,
549  *   and whenever the L4 table gets used as a kernel one the missing
550  *   mapping gets inserted,
551  * - when set, L4 tables get created with the respective slot initialized
552  *   as before, and whenever the L4 table gets used as a user one the
553  *   mapping gets zapped.
554  */
555 #define VMASST_TYPE_m2p_strict           32
556 
557 #if __XEN_INTERFACE_VERSION__ < 0x00040600
558 #define MAX_VMASST_TYPE                  3
559 #endif
560 
561 /* Domain ids >= DOMID_FIRST_RESERVED cannot be used for ordinary domains. */
562 #define DOMID_FIRST_RESERVED xen_mk_uint(0x7FF0)
563 
564 /* DOMID_SELF is used in certain contexts to refer to oneself. */
565 #define DOMID_SELF           xen_mk_uint(0x7FF0)
566 
567 /*
568  * DOMID_IO is used to restrict page-table updates to mapping I/O memory.
569  * Although no Foreign Domain need be specified to map I/O pages, DOMID_IO
570  * is useful to ensure that no mappings to the OS's own heap are accidentally
571  * installed. (e.g., in Linux this could cause havoc as reference counts
572  * aren't adjusted on the I/O-mapping code path).
573  * This only makes sense as HYPERVISOR_mmu_update()'s and
574  * HYPERVISOR_update_va_mapping_otherdomain()'s "foreigndom" argument. For
575  * HYPERVISOR_mmu_update() context it can be specified by any calling domain,
576  * otherwise it's only permitted if the caller is privileged.
577  */
578 #define DOMID_IO             xen_mk_uint(0x7FF1)
579 
580 /*
581  * DOMID_XEN is used to allow privileged domains to map restricted parts of
582  * Xen's heap space (e.g., the machine_to_phys table).
583  * This only makes sense as
584  * - HYPERVISOR_mmu_update()'s, HYPERVISOR_mmuext_op()'s, or
585  *   HYPERVISOR_update_va_mapping_otherdomain()'s "foreigndom" argument,
586  * - with XENMAPSPACE_gmfn_foreign,
587  * and is only permitted if the caller is privileged.
588  */
589 #define DOMID_XEN            xen_mk_uint(0x7FF2)
590 
591 /*
592  * DOMID_COW is used as the owner of sharable pages */
593 #define DOMID_COW            xen_mk_uint(0x7FF3)
594 
595 /* DOMID_INVALID is used to identify pages with unknown owner. */
596 #define DOMID_INVALID        xen_mk_uint(0x7FF4)
597 
598 /* Idle domain. */
599 #define DOMID_IDLE           xen_mk_uint(0x7FFF)
600 
601 /* Mask for valid domain id values */
602 #define DOMID_MASK           xen_mk_uint(0x7FFF)
603 
604 #ifndef __ASSEMBLY__
605 
606 typedef uint16_t domid_t;
607 
608 /*
609  * Send an array of these to HYPERVISOR_mmu_update().
610  * NB. The fields are natural pointer/address size for this architecture.
611  */
612 struct mmu_update {
613     uint64_t ptr;       /* Machine address of PTE. */
614     uint64_t val;       /* New contents of PTE.    */
615 };
616 typedef struct mmu_update mmu_update_t;
617 DEFINE_XEN_GUEST_HANDLE(mmu_update_t);
618 
619 /*
620  * ` enum neg_errnoval
621  * ` HYPERVISOR_multicall(multicall_entry_t call_list[],
622  * `                      uint32_t nr_calls);
623  *
624  * NB. The fields are logically the natural register size for this
625  * architecture. In cases where xen_ulong_t is larger than this then
626  * any unused bits in the upper portion must be zero.
627  */
628 struct multicall_entry {
629     xen_ulong_t op, result;
630     xen_ulong_t args[6];
631 };
632 typedef struct multicall_entry multicall_entry_t;
633 DEFINE_XEN_GUEST_HANDLE(multicall_entry_t);
634 
635 #if __XEN_INTERFACE_VERSION__ < 0x00040400
636 /*
637  * Event channel endpoints per domain (when using the 2-level ABI):
638  *  1024 if a long is 32 bits; 4096 if a long is 64 bits.
639  */
640 #define NR_EVENT_CHANNELS EVTCHN_2L_NR_CHANNELS
641 #endif
642 
643 struct vcpu_time_info {
644     /*
645      * Updates to the following values are preceded and followed by an
646      * increment of 'version'. The guest can therefore detect updates by
647      * looking for changes to 'version'. If the least-significant bit of
648      * the version number is set then an update is in progress and the guest
649      * must wait to read a consistent set of values.
650      * The correct way to interact with the version number is similar to
651      * Linux's seqlock: see the implementations of read_seqbegin/read_seqretry.
652      */
653     uint32_t version;
654     uint32_t pad0;
655     uint64_t tsc_timestamp;   /* TSC at last update of time vals.  */
656     uint64_t system_time;     /* Time, in nanosecs, since boot.    */
657     /*
658      * Current system time:
659      *   system_time +
660      *   ((((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul) >> 32)
661      * CPU frequency (Hz):
662      *   ((10^9 << 32) / tsc_to_system_mul) >> tsc_shift
663      */
664     uint32_t tsc_to_system_mul;
665     int8_t   tsc_shift;
666 #if __XEN_INTERFACE_VERSION__ > 0x040600
667     uint8_t  flags;
668     uint8_t  pad1[2];
669 #else
670     int8_t   pad1[3];
671 #endif
672 }; /* 32 bytes */
673 typedef struct vcpu_time_info vcpu_time_info_t;
674 
675 #define XEN_PVCLOCK_TSC_STABLE_BIT     (1 << 0)
676 #define XEN_PVCLOCK_GUEST_STOPPED      (1 << 1)
677 
678 struct vcpu_info {
679     /*
680      * 'evtchn_upcall_pending' is written non-zero by Xen to indicate
681      * a pending notification for a particular VCPU. It is then cleared
682      * by the guest OS /before/ checking for pending work, thus avoiding
683      * a set-and-check race. Note that the mask is only accessed by Xen
684      * on the CPU that is currently hosting the VCPU. This means that the
685      * pending and mask flags can be updated by the guest without special
686      * synchronisation (i.e., no need for the x86 LOCK prefix).
687      * This may seem suboptimal because if the pending flag is set by
688      * a different CPU then an IPI may be scheduled even when the mask
689      * is set. However, note:
690      *  1. The task of 'interrupt holdoff' is covered by the per-event-
691      *     channel mask bits. A 'noisy' event that is continually being
692      *     triggered can be masked at source at this very precise
693      *     granularity.
694      *  2. The main purpose of the per-VCPU mask is therefore to restrict
695      *     reentrant execution: whether for concurrency control, or to
696      *     prevent unbounded stack usage. Whatever the purpose, we expect
697      *     that the mask will be asserted only for short periods at a time,
698      *     and so the likelihood of a 'spurious' IPI is suitably small.
699      * The mask is read before making an event upcall to the guest: a
700      * non-zero mask therefore guarantees that the VCPU will not receive
701      * an upcall activation. The mask is cleared when the VCPU requests
702      * to block: this avoids wakeup-waiting races.
703      */
704     uint8_t evtchn_upcall_pending;
705 #ifdef XEN_HAVE_PV_UPCALL_MASK
706     uint8_t evtchn_upcall_mask;
707 #else /* XEN_HAVE_PV_UPCALL_MASK */
708     uint8_t pad0;
709 #endif /* XEN_HAVE_PV_UPCALL_MASK */
710     xen_ulong_t evtchn_pending_sel;
711     struct arch_vcpu_info arch;
712     vcpu_time_info_t time;
713 }; /* 64 bytes (x86) */
714 #ifndef __XEN__
715 typedef struct vcpu_info vcpu_info_t;
716 #endif
717 
718 /*
719  * `incontents 200 startofday_shared Start-of-day shared data structure
720  * Xen/kernel shared data -- pointer provided in start_info.
721  *
722  * This structure is defined to be both smaller than a page, and the
723  * only data on the shared page, but may vary in actual size even within
724  * compatible Xen versions; guests should not rely on the size
725  * of this structure remaining constant.
726  */
727 struct shared_info {
728     struct vcpu_info vcpu_info[XEN_LEGACY_MAX_VCPUS];
729 
730     /*
731      * A domain can create "event channels" on which it can send and receive
732      * asynchronous event notifications. There are three classes of event that
733      * are delivered by this mechanism:
734      *  1. Bi-directional inter- and intra-domain connections. Domains must
735      *     arrange out-of-band to set up a connection (usually by allocating
736      *     an unbound 'listener' port and avertising that via a storage service
737      *     such as xenstore).
738      *  2. Physical interrupts. A domain with suitable hardware-access
739      *     privileges can bind an event-channel port to a physical interrupt
740      *     source.
741      *  3. Virtual interrupts ('events'). A domain can bind an event-channel
742      *     port to a virtual interrupt source, such as the virtual-timer
743      *     device or the emergency console.
744      *
745      * Event channels are addressed by a "port index". Each channel is
746      * associated with two bits of information:
747      *  1. PENDING -- notifies the domain that there is a pending notification
748      *     to be processed. This bit is cleared by the guest.
749      *  2. MASK -- if this bit is clear then a 0->1 transition of PENDING
750      *     will cause an asynchronous upcall to be scheduled. This bit is only
751      *     updated by the guest. It is read-only within Xen. If a channel
752      *     becomes pending while the channel is masked then the 'edge' is lost
753      *     (i.e., when the channel is unmasked, the guest must manually handle
754      *     pending notifications as no upcall will be scheduled by Xen).
755      *
756      * To expedite scanning of pending notifications, any 0->1 pending
757      * transition on an unmasked channel causes a corresponding bit in a
758      * per-vcpu selector word to be set. Each bit in the selector covers a
759      * 'C long' in the PENDING bitfield array.
760      */
761     xen_ulong_t evtchn_pending[sizeof(xen_ulong_t) * 8];
762     xen_ulong_t evtchn_mask[sizeof(xen_ulong_t) * 8];
763 
764     /*
765      * Wallclock time: updated by control software or RTC emulation.
766      * Guests should base their gettimeofday() syscall on this
767      * wallclock-base value.
768      * The values of wc_sec and wc_nsec are offsets from the Unix epoch
769      * adjusted by the domain's 'time offset' (in seconds) as set either
770      * by XEN_DOMCTL_settimeoffset, or adjusted via a guest write to the
771      * emulated RTC.
772      */
773     uint32_t wc_version;      /* Version counter: see vcpu_time_info_t. */
774     uint32_t wc_sec;
775     uint32_t wc_nsec;
776 #if !defined(__i386__)
777     uint32_t wc_sec_hi;
778 # define xen_wc_sec_hi wc_sec_hi
779 #elif !defined(__XEN__) && !defined(__XEN_TOOLS__)
780 # define xen_wc_sec_hi arch.wc_sec_hi
781 #endif
782 
783     struct arch_shared_info arch;
784 
785 };
786 #ifndef __XEN__
787 typedef struct shared_info shared_info_t;
788 #endif
789 
790 /*
791  * `incontents 200 startofday Start-of-day memory layout
792  *
793  *  1. The domain is started within contiguous virtual-memory region.
794  *  2. The contiguous region ends on an aligned 4MB boundary.
795  *  3. This the order of bootstrap elements in the initial virtual region:
796  *      a. relocated kernel image
797  *      b. initial ram disk              [mod_start, mod_len]
798  *         (may be omitted)
799  *      c. list of allocated page frames [mfn_list, nr_pages]
800  *         (unless relocated due to XEN_ELFNOTE_INIT_P2M)
801  *      d. start_info_t structure        [register rSI (x86)]
802  *         in case of dom0 this page contains the console info, too
803  *      e. unless dom0: xenstore ring page
804  *      f. unless dom0: console ring page
805  *      g. bootstrap page tables         [pt_base and CR3 (x86)]
806  *      h. bootstrap stack               [register ESP (x86)]
807  *  4. Bootstrap elements are packed together, but each is 4kB-aligned.
808  *  5. The list of page frames forms a contiguous 'pseudo-physical' memory
809  *     layout for the domain. In particular, the bootstrap virtual-memory
810  *     region is a 1:1 mapping to the first section of the pseudo-physical map.
811  *  6. All bootstrap elements are mapped read-writable for the guest OS. The
812  *     only exception is the bootstrap page table, which is mapped read-only.
813  *  7. There is guaranteed to be at least 512kB padding after the final
814  *     bootstrap element. If necessary, the bootstrap virtual region is
815  *     extended by an extra 4MB to ensure this.
816  *
817  * Note: Prior to 25833:bb85bbccb1c9. ("x86/32-on-64 adjust Dom0 initial page
818  * table layout") a bug caused the pt_base (3.g above) and cr3 to not point
819  * to the start of the guest page tables (it was offset by two pages).
820  * This only manifested itself on 32-on-64 dom0 kernels and not 32-on-64 domU
821  * or 64-bit kernels of any colour. The page tables for a 32-on-64 dom0 got
822  * allocated in the order: 'first L1','first L2', 'first L3', so the offset
823  * to the page table base is by two pages back. The initial domain if it is
824  * 32-bit and runs under a 64-bit hypervisor should _NOT_ use two of the
825  * pages preceding pt_base and mark them as reserved/unused.
826  */
827 #ifdef XEN_HAVE_PV_GUEST_ENTRY
828 struct start_info {
829     /* THE FOLLOWING ARE FILLED IN BOTH ON INITIAL BOOT AND ON RESUME.    */
830     char magic[32];             /* "xen-<version>-<platform>".            */
831     unsigned long nr_pages;     /* Total pages allocated to this domain.  */
832     unsigned long shared_info;  /* MACHINE address of shared info struct. */
833     uint32_t flags;             /* SIF_xxx flags.                         */
834     xen_pfn_t store_mfn;        /* MACHINE page number of shared page.    */
835     uint32_t store_evtchn;      /* Event channel for store communication. */
836     union {
837         struct {
838             xen_pfn_t mfn;      /* MACHINE page number of console page.   */
839             uint32_t  evtchn;   /* Event channel for console page.        */
840         } domU;
841         struct {
842             uint32_t info_off;  /* Offset of console_info struct.         */
843             uint32_t info_size; /* Size of console_info struct from start.*/
844         } dom0;
845     } console;
846     /* THE FOLLOWING ARE ONLY FILLED IN ON INITIAL BOOT (NOT RESUME).     */
847     unsigned long pt_base;      /* VIRTUAL address of page directory.     */
848     unsigned long nr_pt_frames; /* Number of bootstrap p.t. frames.       */
849     unsigned long mfn_list;     /* VIRTUAL address of page-frame list.    */
850     unsigned long mod_start;    /* VIRTUAL address of pre-loaded module   */
851                                 /* (PFN of pre-loaded module if           */
852                                 /*  SIF_MOD_START_PFN set in flags).      */
853     unsigned long mod_len;      /* Size (bytes) of pre-loaded module.     */
854 #define MAX_GUEST_CMDLINE 1024
855     int8_t cmd_line[MAX_GUEST_CMDLINE];
856     /* The pfn range here covers both page table and p->m table frames.   */
857     unsigned long first_p2m_pfn;/* 1st pfn forming initial P->M table.    */
858     unsigned long nr_p2m_frames;/* # of pfns forming initial P->M table.  */
859 };
860 typedef struct start_info start_info_t;
861 
862 /* New console union for dom0 introduced in 0x00030203. */
863 #if __XEN_INTERFACE_VERSION__ < 0x00030203
864 #define console_mfn    console.domU.mfn
865 #define console_evtchn console.domU.evtchn
866 #endif
867 #endif /* XEN_HAVE_PV_GUEST_ENTRY */
868 
869 /* These flags are passed in the 'flags' field of start_info_t. */
870 #define SIF_PRIVILEGED    (1<<0)  /* Is the domain privileged? */
871 #define SIF_INITDOMAIN    (1<<1)  /* Is this the initial control domain? */
872 #define SIF_MULTIBOOT_MOD (1<<2)  /* Is mod_start a multiboot module? */
873 #define SIF_MOD_START_PFN (1<<3)  /* Is mod_start a PFN? */
874 #define SIF_VIRT_P2M_4TOOLS (1<<4) /* Do Xen tools understand a virt. mapped */
875                                    /* P->M making the 3 level tree obsolete? */
876 #define SIF_PM_MASK       (0xFF<<8) /* reserve 1 byte for xen-pm options */
877 
878 /*
879  * A multiboot module is a package containing modules very similar to a
880  * multiboot module array. The only differences are:
881  * - the array of module descriptors is by convention simply at the beginning
882  *   of the multiboot module,
883  * - addresses in the module descriptors are based on the beginning of the
884  *   multiboot module,
885  * - the number of modules is determined by a termination descriptor that has
886  *   mod_start == 0.
887  *
888  * This permits to both build it statically and reference it in a configuration
889  * file, and let the PV guest easily rebase the addresses to virtual addresses
890  * and at the same time count the number of modules.
891  */
892 struct xen_multiboot_mod_list
893 {
894     /* Address of first byte of the module */
895     uint32_t mod_start;
896     /* Address of last byte of the module (inclusive) */
897     uint32_t mod_end;
898     /* Address of zero-terminated command line */
899     uint32_t cmdline;
900     /* Unused, must be zero */
901     uint32_t pad;
902 };
903 /*
904  * `incontents 200 startofday_dom0_console Dom0_console
905  *
906  * The console structure in start_info.console.dom0
907  *
908  * This structure includes a variety of information required to
909  * have a working VGA/VESA console.
910  */
911 typedef struct dom0_vga_console_info {
912     uint8_t video_type; /* DOM0_VGA_CONSOLE_??? */
913 #define XEN_VGATYPE_TEXT_MODE_3 0x03
914 #define XEN_VGATYPE_VESA_LFB    0x23
915 #define XEN_VGATYPE_EFI_LFB     0x70
916 
917     union {
918         struct {
919             /* Font height, in pixels. */
920             uint16_t font_height;
921             /* Cursor location (column, row). */
922             uint16_t cursor_x, cursor_y;
923             /* Number of rows and columns (dimensions in characters). */
924             uint16_t rows, columns;
925         } text_mode_3;
926 
927         struct {
928             /* Width and height, in pixels. */
929             uint16_t width, height;
930             /* Bytes per scan line. */
931             uint16_t bytes_per_line;
932             /* Bits per pixel. */
933             uint16_t bits_per_pixel;
934             /* LFB physical address, and size (in units of 64kB). */
935             uint32_t lfb_base;
936             uint32_t lfb_size;
937             /* RGB mask offsets and sizes, as defined by VBE 1.2+ */
938             uint8_t  red_pos, red_size;
939             uint8_t  green_pos, green_size;
940             uint8_t  blue_pos, blue_size;
941             uint8_t  rsvd_pos, rsvd_size;
942 #if __XEN_INTERFACE_VERSION__ >= 0x00030206
943             /* VESA capabilities (offset 0xa, VESA command 0x4f00). */
944             uint32_t gbl_caps;
945             /* Mode attributes (offset 0x0, VESA command 0x4f01). */
946             uint16_t mode_attrs;
947             uint16_t pad;
948 #endif
949 #if __XEN_INTERFACE_VERSION__ >= 0x00040d00
950             /* high 32 bits of lfb_base */
951             uint32_t ext_lfb_base;
952 #endif
953         } vesa_lfb;
954     } u;
955 } dom0_vga_console_info_t;
956 #define xen_vga_console_info dom0_vga_console_info
957 #define xen_vga_console_info_t dom0_vga_console_info_t
958 
959 typedef uint8_t xen_domain_handle_t[16];
960 
961 __DEFINE_XEN_GUEST_HANDLE(uint8,  uint8_t);
962 __DEFINE_XEN_GUEST_HANDLE(uint16, uint16_t);
963 __DEFINE_XEN_GUEST_HANDLE(uint32, uint32_t);
964 __DEFINE_XEN_GUEST_HANDLE(uint64, uint64_t);
965 
966 typedef struct {
967     uint8_t a[16];
968 } xen_uuid_t;
969 
970 /*
971  * XEN_DEFINE_UUID(0x00112233, 0x4455, 0x6677, 0x8899,
972  *                 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff)
973  * will construct UUID 00112233-4455-6677-8899-aabbccddeeff presented as
974  * {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
975  * 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
976  *
977  * NB: This is compatible with Linux kernel and with libuuid, but it is not
978  * compatible with Microsoft, as they use mixed-endian encoding (some
979  * components are little-endian, some are big-endian).
980  */
981 #define XEN_DEFINE_UUID_(a, b, c, d, e1, e2, e3, e4, e5, e6)            \
982     {{((a) >> 24) & 0xFF, ((a) >> 16) & 0xFF,                           \
983       ((a) >>  8) & 0xFF, ((a) >>  0) & 0xFF,                           \
984       ((b) >>  8) & 0xFF, ((b) >>  0) & 0xFF,                           \
985       ((c) >>  8) & 0xFF, ((c) >>  0) & 0xFF,                           \
986       ((d) >>  8) & 0xFF, ((d) >>  0) & 0xFF,                           \
987                 e1, e2, e3, e4, e5, e6}}
988 
989 #if defined(__STDC_VERSION__) ? __STDC_VERSION__ >= 199901L : defined(__GNUC__)
990 #define XEN_DEFINE_UUID(a, b, c, d, e1, e2, e3, e4, e5, e6)             \
991     ((xen_uuid_t)XEN_DEFINE_UUID_(a, b, c, d, e1, e2, e3, e4, e5, e6))
992 #else
993 #define XEN_DEFINE_UUID(a, b, c, d, e1, e2, e3, e4, e5, e6)             \
994     XEN_DEFINE_UUID_(a, b, c, d, e1, e2, e3, e4, e5, e6)
995 #endif /* __STDC_VERSION__ / __GNUC__ */
996 
997 #endif /* !__ASSEMBLY__ */
998 
999 /* Default definitions for macros used by domctl/sysctl. */
1000 #if defined(__XEN__) || defined(__XEN_TOOLS__)
1001 
1002 #ifndef int64_aligned_t
1003 #define int64_aligned_t int64_t
1004 #endif
1005 #ifndef uint64_aligned_t
1006 #define uint64_aligned_t uint64_t
1007 #endif
1008 #ifndef XEN_GUEST_HANDLE_64
1009 #define XEN_GUEST_HANDLE_64(name) XEN_GUEST_HANDLE(name)
1010 #endif
1011 
1012 #ifndef __ASSEMBLY__
1013 struct xenctl_bitmap {
1014     XEN_GUEST_HANDLE_64(uint8) bitmap;
1015     uint32_t nr_bits;
1016 };
1017 typedef struct xenctl_bitmap xenctl_bitmap_t;
1018 #endif
1019 
1020 #endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */
1021 
1022 #endif /* __XEN_PUBLIC_XEN_H__ */
1023 
1024 /*
1025  * Local variables:
1026  * mode: C
1027  * c-file-style: "BSD"
1028  * c-basic-offset: 4
1029  * tab-width: 4
1030  * indent-tabs-mode: nil
1031  * End:
1032  */
1033