ia64/xen-unstable

view xen/include/public/xen.h @ 9887:3726c0afc5af

Allow for arch specific virq definitions.

Signed-off-by Kevin Tian <kevin.tian@intel.com>
author kaf24@firebug.cl.cam.ac.uk
date Fri Apr 28 14:27:38 2006 +0100 (2006-04-28)
parents 4e1b8be54311
children 84780e2ea775
line source
1 /******************************************************************************
2 * xen.h
3 *
4 * Guest OS interface to Xen.
5 *
6 * Copyright (c) 2004, K A Fraser
7 */
9 #ifndef __XEN_PUBLIC_XEN_H__
10 #define __XEN_PUBLIC_XEN_H__
12 #if defined(__i386__)
13 #include "arch-x86_32.h"
14 #elif defined(__x86_64__)
15 #include "arch-x86_64.h"
16 #elif defined(__ia64__)
17 #include "arch-ia64.h"
18 #else
19 #error "Unsupported architecture"
20 #endif
22 /*
23 * XEN "SYSTEM CALLS" (a.k.a. HYPERCALLS).
24 */
26 /*
27 * x86_32: EAX = vector; EBX, ECX, EDX, ESI, EDI = args 1, 2, 3, 4, 5.
28 * EAX = return value
29 * (argument registers may be clobbered on return)
30 * x86_64: RAX = vector; RDI, RSI, RDX, R10, R8, R9 = args 1, 2, 3, 4, 5, 6.
31 * RAX = return value
32 * (argument registers not clobbered on return; RCX, R11 are)
33 */
34 #define __HYPERVISOR_set_trap_table 0
35 #define __HYPERVISOR_mmu_update 1
36 #define __HYPERVISOR_set_gdt 2
37 #define __HYPERVISOR_stack_switch 3
38 #define __HYPERVISOR_set_callbacks 4
39 #define __HYPERVISOR_fpu_taskswitch 5
40 #define __HYPERVISOR_sched_op_compat 6 /* compat as of 0x00030101 */
41 #define __HYPERVISOR_dom0_op 7
42 #define __HYPERVISOR_set_debugreg 8
43 #define __HYPERVISOR_get_debugreg 9
44 #define __HYPERVISOR_update_descriptor 10
45 #define __HYPERVISOR_memory_op 12
46 #define __HYPERVISOR_multicall 13
47 #define __HYPERVISOR_update_va_mapping 14
48 #define __HYPERVISOR_set_timer_op 15
49 #define __HYPERVISOR_event_channel_op 16
50 #define __HYPERVISOR_xen_version 17
51 #define __HYPERVISOR_console_io 18
52 #define __HYPERVISOR_physdev_op 19
53 #define __HYPERVISOR_grant_table_op 20
54 #define __HYPERVISOR_vm_assist 21
55 #define __HYPERVISOR_update_va_mapping_otherdomain 22
56 #define __HYPERVISOR_iret 23 /* x86 only */
57 #define __HYPERVISOR_vcpu_op 24
58 #define __HYPERVISOR_set_segment_base 25 /* x86/64 only */
59 #define __HYPERVISOR_mmuext_op 26
60 #define __HYPERVISOR_acm_op 27
61 #define __HYPERVISOR_nmi_op 28
62 #define __HYPERVISOR_sched_op 29
63 #define __HYPERVISOR_callback_op 30
64 #define __HYPERVISOR_xenoprof_op 31
66 /*
67 * VIRTUAL INTERRUPTS
68 *
69 * Virtual interrupts that a guest OS may receive from Xen.
70 *
71 * In the side comments, 'V.' denotes a per-VCPU VIRQ while 'G.' denotes a
72 * global VIRQ. The former can be bound once per VCPU and cannot be re-bound.
73 * The latter can be allocated only once per guest: they must initially be
74 * allocated to VCPU0 but can subsequently be re-bound.
75 */
76 #define VIRQ_TIMER 0 /* V. Timebase update, and/or requested timeout. */
77 #define VIRQ_DEBUG 1 /* V. Request guest to dump debug info. */
78 #define VIRQ_CONSOLE 2 /* G. (DOM0) Bytes received on emergency console. */
79 #define VIRQ_DOM_EXC 3 /* G. (DOM0) Exceptional event for some domain. */
80 #define VIRQ_TBUF 4 /* G. (DOM0) Trace buffer has records available. */
81 #define VIRQ_DEBUGGER 6 /* G. (DOM0) A domain has paused for debugging. */
82 #define VIRQ_XENOPROF 7 /* V. XenOprofile interrupt: new sample available */
84 /* Architecture-specific VIRQ definitions. */
85 #define VIRQ_ARCH_0 16
86 #define VIRQ_ARCH_1 17
87 #define VIRQ_ARCH_2 18
88 #define VIRQ_ARCH_3 19
89 #define VIRQ_ARCH_4 20
90 #define VIRQ_ARCH_5 21
91 #define VIRQ_ARCH_6 22
92 #define VIRQ_ARCH_7 23
94 #define NR_VIRQS 24
96 /*
97 * MMU-UPDATE REQUESTS
98 *
99 * HYPERVISOR_mmu_update() accepts a list of (ptr, val) pairs.
100 * A foreigndom (FD) can be specified (or DOMID_SELF for none).
101 * Where the FD has some effect, it is described below.
102 * ptr[1:0] specifies the appropriate MMU_* command.
103 *
104 * ptr[1:0] == MMU_NORMAL_PT_UPDATE:
105 * Updates an entry in a page table. If updating an L1 table, and the new
106 * table entry is valid/present, the mapped frame must belong to the FD, if
107 * an FD has been specified. If attempting to map an I/O page then the
108 * caller assumes the privilege of the FD.
109 * FD == DOMID_IO: Permit /only/ I/O mappings, at the priv level of the caller.
110 * FD == DOMID_XEN: Map restricted areas of Xen's heap space.
111 * ptr[:2] -- Machine address of the page-table entry to modify.
112 * val -- Value to write.
113 *
114 * ptr[1:0] == MMU_MACHPHYS_UPDATE:
115 * Updates an entry in the machine->pseudo-physical mapping table.
116 * ptr[:2] -- Machine address within the frame whose mapping to modify.
117 * The frame must belong to the FD, if one is specified.
118 * val -- Value to write into the mapping entry.
119 */
120 #define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */
121 #define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */
123 /*
124 * MMU EXTENDED OPERATIONS
125 *
126 * HYPERVISOR_mmuext_op() accepts a list of mmuext_op structures.
127 * A foreigndom (FD) can be specified (or DOMID_SELF for none).
128 * Where the FD has some effect, it is described below.
129 *
130 * cmd: MMUEXT_(UN)PIN_*_TABLE
131 * mfn: Machine frame number to be (un)pinned as a p.t. page.
132 * The frame must belong to the FD, if one is specified.
133 *
134 * cmd: MMUEXT_NEW_BASEPTR
135 * mfn: Machine frame number of new page-table base to install in MMU.
136 *
137 * cmd: MMUEXT_NEW_USER_BASEPTR [x86/64 only]
138 * mfn: Machine frame number of new page-table base to install in MMU
139 * when in user space.
140 *
141 * cmd: MMUEXT_TLB_FLUSH_LOCAL
142 * No additional arguments. Flushes local TLB.
143 *
144 * cmd: MMUEXT_INVLPG_LOCAL
145 * linear_addr: Linear address to be flushed from the local TLB.
146 *
147 * cmd: MMUEXT_TLB_FLUSH_MULTI
148 * vcpumask: Pointer to bitmap of VCPUs to be flushed.
149 *
150 * cmd: MMUEXT_INVLPG_MULTI
151 * linear_addr: Linear address to be flushed.
152 * vcpumask: Pointer to bitmap of VCPUs to be flushed.
153 *
154 * cmd: MMUEXT_TLB_FLUSH_ALL
155 * No additional arguments. Flushes all VCPUs' TLBs.
156 *
157 * cmd: MMUEXT_INVLPG_ALL
158 * linear_addr: Linear address to be flushed from all VCPUs' TLBs.
159 *
160 * cmd: MMUEXT_FLUSH_CACHE
161 * No additional arguments. Writes back and flushes cache contents.
162 *
163 * cmd: MMUEXT_SET_LDT
164 * linear_addr: Linear address of LDT base (NB. must be page-aligned).
165 * nr_ents: Number of entries in LDT.
166 */
167 #define MMUEXT_PIN_L1_TABLE 0
168 #define MMUEXT_PIN_L2_TABLE 1
169 #define MMUEXT_PIN_L3_TABLE 2
170 #define MMUEXT_PIN_L4_TABLE 3
171 #define MMUEXT_UNPIN_TABLE 4
172 #define MMUEXT_NEW_BASEPTR 5
173 #define MMUEXT_TLB_FLUSH_LOCAL 6
174 #define MMUEXT_INVLPG_LOCAL 7
175 #define MMUEXT_TLB_FLUSH_MULTI 8
176 #define MMUEXT_INVLPG_MULTI 9
177 #define MMUEXT_TLB_FLUSH_ALL 10
178 #define MMUEXT_INVLPG_ALL 11
179 #define MMUEXT_FLUSH_CACHE 12
180 #define MMUEXT_SET_LDT 13
181 #define MMUEXT_NEW_USER_BASEPTR 15
183 #ifndef __ASSEMBLY__
184 typedef struct mmuext_op {
185 unsigned int cmd;
186 union {
187 /* [UN]PIN_TABLE, NEW_BASEPTR, NEW_USER_BASEPTR */
188 unsigned long mfn;
189 /* INVLPG_LOCAL, INVLPG_ALL, SET_LDT */
190 unsigned long linear_addr;
191 } arg1;
192 union {
193 /* SET_LDT */
194 unsigned int nr_ents;
195 /* TLB_FLUSH_MULTI, INVLPG_MULTI */
196 void *vcpumask;
197 } arg2;
198 } mmuext_op_t;
199 DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
200 #endif
202 /* These are passed as 'flags' to update_va_mapping. They can be ORed. */
203 /* When specifying UVMF_MULTI, also OR in a pointer to a CPU bitmap. */
204 /* UVMF_LOCAL is merely UVMF_MULTI with a NULL bitmap pointer. */
205 #define UVMF_NONE (0UL<<0) /* No flushing at all. */
206 #define UVMF_TLB_FLUSH (1UL<<0) /* Flush entire TLB(s). */
207 #define UVMF_INVLPG (2UL<<0) /* Flush only one entry. */
208 #define UVMF_FLUSHTYPE_MASK (3UL<<0)
209 #define UVMF_MULTI (0UL<<2) /* Flush subset of TLBs. */
210 #define UVMF_LOCAL (0UL<<2) /* Flush local TLB. */
211 #define UVMF_ALL (1UL<<2) /* Flush all TLBs. */
213 /*
214 * Commands to HYPERVISOR_console_io().
215 */
216 #define CONSOLEIO_write 0
217 #define CONSOLEIO_read 1
219 /*
220 * Commands to HYPERVISOR_vm_assist().
221 */
222 #define VMASST_CMD_enable 0
223 #define VMASST_CMD_disable 1
224 #define VMASST_TYPE_4gb_segments 0
225 #define VMASST_TYPE_4gb_segments_notify 1
226 #define VMASST_TYPE_writable_pagetables 2
227 #define MAX_VMASST_TYPE 2
229 #ifndef __ASSEMBLY__
231 typedef uint16_t domid_t;
233 /* Domain ids >= DOMID_FIRST_RESERVED cannot be used for ordinary domains. */
234 #define DOMID_FIRST_RESERVED (0x7FF0U)
236 /* DOMID_SELF is used in certain contexts to refer to oneself. */
237 #define DOMID_SELF (0x7FF0U)
239 /*
240 * DOMID_IO is used to restrict page-table updates to mapping I/O memory.
241 * Although no Foreign Domain need be specified to map I/O pages, DOMID_IO
242 * is useful to ensure that no mappings to the OS's own heap are accidentally
243 * installed. (e.g., in Linux this could cause havoc as reference counts
244 * aren't adjusted on the I/O-mapping code path).
245 * This only makes sense in MMUEXT_SET_FOREIGNDOM, but in that context can
246 * be specified by any calling domain.
247 */
248 #define DOMID_IO (0x7FF1U)
250 /*
251 * DOMID_XEN is used to allow privileged domains to map restricted parts of
252 * Xen's heap space (e.g., the machine_to_phys table).
253 * This only makes sense in MMUEXT_SET_FOREIGNDOM, and is only permitted if
254 * the caller is privileged.
255 */
256 #define DOMID_XEN (0x7FF2U)
258 /*
259 * Send an array of these to HYPERVISOR_mmu_update().
260 * NB. The fields are natural pointer/address size for this architecture.
261 */
262 typedef struct mmu_update {
263 uint64_t ptr; /* Machine address of PTE. */
264 uint64_t val; /* New contents of PTE. */
265 } mmu_update_t;
266 DEFINE_XEN_GUEST_HANDLE(mmu_update_t);
268 /*
269 * Send an array of these to HYPERVISOR_multicall().
270 * NB. The fields are natural register size for this architecture.
271 */
272 typedef struct multicall_entry {
273 unsigned long op, result;
274 unsigned long args[6];
275 } multicall_entry_t;
276 DEFINE_XEN_GUEST_HANDLE(multicall_entry_t);
278 /*
279 * Event channel endpoints per domain:
280 * 1024 if a long is 32 bits; 4096 if a long is 64 bits.
281 */
282 #define NR_EVENT_CHANNELS (sizeof(unsigned long) * sizeof(unsigned long) * 64)
284 typedef struct vcpu_time_info {
285 /*
286 * Updates to the following values are preceded and followed by an
287 * increment of 'version'. The guest can therefore detect updates by
288 * looking for changes to 'version'. If the least-significant bit of
289 * the version number is set then an update is in progress and the guest
290 * must wait to read a consistent set of values.
291 * The correct way to interact with the version number is similar to
292 * Linux's seqlock: see the implementations of read_seqbegin/read_seqretry.
293 */
294 uint32_t version;
295 uint32_t pad0;
296 uint64_t tsc_timestamp; /* TSC at last update of time vals. */
297 uint64_t system_time; /* Time, in nanosecs, since boot. */
298 /*
299 * Current system time:
300 * system_time +
301 * ((((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul) >> 32)
302 * CPU frequency (Hz):
303 * ((10^9 << 32) / tsc_to_system_mul) >> tsc_shift
304 */
305 uint32_t tsc_to_system_mul;
306 int8_t tsc_shift;
307 int8_t pad1[3];
308 } vcpu_time_info_t; /* 32 bytes */
310 typedef struct vcpu_info {
311 /*
312 * 'evtchn_upcall_pending' is written non-zero by Xen to indicate
313 * a pending notification for a particular VCPU. It is then cleared
314 * by the guest OS /before/ checking for pending work, thus avoiding
315 * a set-and-check race. Note that the mask is only accessed by Xen
316 * on the CPU that is currently hosting the VCPU. This means that the
317 * pending and mask flags can be updated by the guest without special
318 * synchronisation (i.e., no need for the x86 LOCK prefix).
319 * This may seem suboptimal because if the pending flag is set by
320 * a different CPU then an IPI may be scheduled even when the mask
321 * is set. However, note:
322 * 1. The task of 'interrupt holdoff' is covered by the per-event-
323 * channel mask bits. A 'noisy' event that is continually being
324 * triggered can be masked at source at this very precise
325 * granularity.
326 * 2. The main purpose of the per-VCPU mask is therefore to restrict
327 * reentrant execution: whether for concurrency control, or to
328 * prevent unbounded stack usage. Whatever the purpose, we expect
329 * that the mask will be asserted only for short periods at a time,
330 * and so the likelihood of a 'spurious' IPI is suitably small.
331 * The mask is read before making an event upcall to the guest: a
332 * non-zero mask therefore guarantees that the VCPU will not receive
333 * an upcall activation. The mask is cleared when the VCPU requests
334 * to block: this avoids wakeup-waiting races.
335 */
336 uint8_t evtchn_upcall_pending;
337 uint8_t evtchn_upcall_mask;
338 unsigned long evtchn_pending_sel;
339 arch_vcpu_info_t arch;
340 vcpu_time_info_t time;
341 } vcpu_info_t; /* 64 bytes (x86) */
343 /*
344 * Xen/kernel shared data -- pointer provided in start_info.
345 * NB. We expect that this struct is smaller than a page.
346 */
347 typedef struct shared_info {
348 vcpu_info_t vcpu_info[MAX_VIRT_CPUS];
350 /*
351 * A domain can create "event channels" on which it can send and receive
352 * asynchronous event notifications. There are three classes of event that
353 * are delivered by this mechanism:
354 * 1. Bi-directional inter- and intra-domain connections. Domains must
355 * arrange out-of-band to set up a connection (usually by allocating
356 * an unbound 'listener' port and avertising that via a storage service
357 * such as xenstore).
358 * 2. Physical interrupts. A domain with suitable hardware-access
359 * privileges can bind an event-channel port to a physical interrupt
360 * source.
361 * 3. Virtual interrupts ('events'). A domain can bind an event-channel
362 * port to a virtual interrupt source, such as the virtual-timer
363 * device or the emergency console.
364 *
365 * Event channels are addressed by a "port index". Each channel is
366 * associated with two bits of information:
367 * 1. PENDING -- notifies the domain that there is a pending notification
368 * to be processed. This bit is cleared by the guest.
369 * 2. MASK -- if this bit is clear then a 0->1 transition of PENDING
370 * will cause an asynchronous upcall to be scheduled. This bit is only
371 * updated by the guest. It is read-only within Xen. If a channel
372 * becomes pending while the channel is masked then the 'edge' is lost
373 * (i.e., when the channel is unmasked, the guest must manually handle
374 * pending notifications as no upcall will be scheduled by Xen).
375 *
376 * To expedite scanning of pending notifications, any 0->1 pending
377 * transition on an unmasked channel causes a corresponding bit in a
378 * per-vcpu selector word to be set. Each bit in the selector covers a
379 * 'C long' in the PENDING bitfield array.
380 */
381 unsigned long evtchn_pending[sizeof(unsigned long) * 8];
382 unsigned long evtchn_mask[sizeof(unsigned long) * 8];
384 /*
385 * Wallclock time: updated only by control software. Guests should base
386 * their gettimeofday() syscall on this wallclock-base value.
387 */
388 uint32_t wc_version; /* Version counter: see vcpu_time_info_t. */
389 uint32_t wc_sec; /* Secs 00:00:00 UTC, Jan 1, 1970. */
390 uint32_t wc_nsec; /* Nsecs 00:00:00 UTC, Jan 1, 1970. */
392 arch_shared_info_t arch;
394 } shared_info_t;
396 /*
397 * Start-of-day memory layout for the initial domain (DOM0):
398 * 1. The domain is started within contiguous virtual-memory region.
399 * 2. The contiguous region begins and ends on an aligned 4MB boundary.
400 * 3. The region start corresponds to the load address of the OS image.
401 * If the load address is not 4MB aligned then the address is rounded down.
402 * 4. This the order of bootstrap elements in the initial virtual region:
403 * a. relocated kernel image
404 * b. initial ram disk [mod_start, mod_len]
405 * c. list of allocated page frames [mfn_list, nr_pages]
406 * d. start_info_t structure [register ESI (x86)]
407 * e. bootstrap page tables [pt_base, CR3 (x86)]
408 * f. bootstrap stack [register ESP (x86)]
409 * 5. Bootstrap elements are packed together, but each is 4kB-aligned.
410 * 6. The initial ram disk may be omitted.
411 * 7. The list of page frames forms a contiguous 'pseudo-physical' memory
412 * layout for the domain. In particular, the bootstrap virtual-memory
413 * region is a 1:1 mapping to the first section of the pseudo-physical map.
414 * 8. All bootstrap elements are mapped read-writable for the guest OS. The
415 * only exception is the bootstrap page table, which is mapped read-only.
416 * 9. There is guaranteed to be at least 512kB padding after the final
417 * bootstrap element. If necessary, the bootstrap virtual region is
418 * extended by an extra 4MB to ensure this.
419 */
421 #define MAX_GUEST_CMDLINE 1024
422 typedef struct start_info {
423 /* THE FOLLOWING ARE FILLED IN BOTH ON INITIAL BOOT AND ON RESUME. */
424 char magic[32]; /* "xen-<version>-<platform>". */
425 unsigned long nr_pages; /* Total pages allocated to this domain. */
426 unsigned long shared_info; /* MACHINE address of shared info struct. */
427 uint32_t flags; /* SIF_xxx flags. */
428 unsigned long store_mfn; /* MACHINE page number of shared page. */
429 uint32_t store_evtchn; /* Event channel for store communication. */
430 unsigned long console_mfn; /* MACHINE address of console page. */
431 uint32_t console_evtchn; /* Event channel for console messages. */
432 /* THE FOLLOWING ARE ONLY FILLED IN ON INITIAL BOOT (NOT RESUME). */
433 unsigned long pt_base; /* VIRTUAL address of page directory. */
434 unsigned long nr_pt_frames; /* Number of bootstrap p.t. frames. */
435 unsigned long mfn_list; /* VIRTUAL address of page-frame list. */
436 unsigned long mod_start; /* VIRTUAL address of pre-loaded module. */
437 unsigned long mod_len; /* Size (bytes) of pre-loaded module. */
438 int8_t cmd_line[MAX_GUEST_CMDLINE];
439 } start_info_t;
441 /* These flags are passed in the 'flags' field of start_info_t. */
442 #define SIF_PRIVILEGED (1<<0) /* Is the domain privileged? */
443 #define SIF_INITDOMAIN (1<<1) /* Is this the initial control domain? */
445 typedef uint64_t cpumap_t;
447 typedef uint8_t xen_domain_handle_t[16];
449 /* Turn a plain number into a C unsigned long constant. */
450 #define __mk_unsigned_long(x) x ## UL
451 #define mk_unsigned_long(x) __mk_unsigned_long(x)
453 #else /* __ASSEMBLY__ */
455 /* In assembly code we cannot use C numeric constant suffixes. */
456 #define mk_unsigned_long(x) x
458 #endif /* !__ASSEMBLY__ */
460 #include "xen-compat.h"
462 #endif /* __XEN_PUBLIC_XEN_H__ */
464 /*
465 * Local variables:
466 * mode: C
467 * c-set-style: "BSD"
468 * c-basic-offset: 4
469 * tab-width: 4
470 * indent-tabs-mode: nil
471 * End:
472 */