2 * QEMU PowerPC XIVE interrupt controller model
4 * Copyright (c) 2017-2018, IBM Corporation.
6 * This code is licensed under the GPL version 2 or later. See the
7 * COPYING file in the top-level directory.
10 #include "qemu/osdep.h"
12 #include "qapi/error.h"
13 #include "target/ppc/cpu.h"
14 #include "sysemu/cpus.h"
15 #include "sysemu/dma.h"
16 #include "hw/qdev-properties.h"
17 #include "monitor/monitor.h"
18 #include "hw/ppc/xive.h"
19 #include "hw/ppc/xive_regs.h"
22 * XIVE Thread Interrupt Management context
26 * Convert a priority number to an Interrupt Pending Buffer (IPB)
27 * register, which indicates a pending interrupt at the priority
28 * corresponding to the bit number
30 static uint8_t priority_to_ipb(uint8_t priority
)
32 return priority
> XIVE_PRIORITY_MAX
?
33 0 : 1 << (XIVE_PRIORITY_MAX
- priority
);
37 * Convert an Interrupt Pending Buffer (IPB) register to a Pending
38 * Interrupt Priority Register (PIPR), which contains the priority of
39 * the most favored pending notification.
41 static uint8_t ipb_to_pipr(uint8_t ibp
)
43 return ibp
? clz32((uint32_t)ibp
<< 24) : 0xff;
46 static void ipb_update(uint8_t *regs
, uint8_t priority
)
48 regs
[TM_IPB
] |= priority_to_ipb(priority
);
49 regs
[TM_PIPR
] = ipb_to_pipr(regs
[TM_IPB
]);
52 static uint8_t exception_mask(uint8_t ring
)
58 g_assert_not_reached();
62 static uint64_t xive_tctx_accept(XiveTCTX
*tctx
, uint8_t ring
)
64 uint8_t *regs
= &tctx
->regs
[ring
];
65 uint8_t nsr
= regs
[TM_NSR
];
66 uint8_t mask
= exception_mask(ring
);
68 qemu_irq_lower(tctx
->output
);
70 if (regs
[TM_NSR
] & mask
) {
71 uint8_t cppr
= regs
[TM_PIPR
];
75 /* Reset the pending buffer bit */
76 regs
[TM_IPB
] &= ~priority_to_ipb(cppr
);
77 regs
[TM_PIPR
] = ipb_to_pipr(regs
[TM_IPB
]);
79 /* Drop Exception bit */
80 regs
[TM_NSR
] &= ~mask
;
83 return (nsr
<< 8) | regs
[TM_CPPR
];
86 static void xive_tctx_notify(XiveTCTX
*tctx
, uint8_t ring
)
88 uint8_t *regs
= &tctx
->regs
[ring
];
90 if (regs
[TM_PIPR
] < regs
[TM_CPPR
]) {
91 regs
[TM_NSR
] |= exception_mask(ring
);
92 qemu_irq_raise(tctx
->output
);
96 static void xive_tctx_set_cppr(XiveTCTX
*tctx
, uint8_t ring
, uint8_t cppr
)
98 if (cppr
> XIVE_PRIORITY_MAX
) {
102 tctx
->regs
[ring
+ TM_CPPR
] = cppr
;
104 /* CPPR has changed, check if we need to raise a pending exception */
105 xive_tctx_notify(tctx
, ring
);
109 * XIVE Thread Interrupt Management Area (TIMA)
113 * Define an access map for each page of the TIMA that we will use in
114 * the memory region ops to filter values when doing loads and stores
115 * of raw registers values
117 * Registers accessibility bits :
125 static const uint8_t xive_tm_hw_view
[] = {
126 /* QW-0 User */ 3, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 0,
127 /* QW-1 OS */ 3, 3, 3, 3, 3, 3, 0, 3, 3, 3, 3, 3, 0, 0, 0, 0,
128 /* QW-2 POOL */ 0, 0, 3, 3, 0, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 0,
129 /* QW-3 PHYS */ 3, 3, 3, 3, 0, 3, 0, 3, 3, 0, 0, 3, 3, 3, 3, 0,
132 static const uint8_t xive_tm_hv_view
[] = {
133 /* QW-0 User */ 3, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 0,
134 /* QW-1 OS */ 3, 3, 3, 3, 3, 3, 0, 3, 3, 3, 3, 3, 0, 0, 0, 0,
135 /* QW-2 POOL */ 0, 0, 3, 3, 0, 0, 0, 0, 0, 3, 3, 3, 0, 0, 0, 0,
136 /* QW-3 PHYS */ 3, 3, 3, 3, 0, 3, 0, 3, 3, 0, 0, 3, 0, 0, 0, 0,
139 static const uint8_t xive_tm_os_view
[] = {
140 /* QW-0 User */ 3, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 0,
141 /* QW-1 OS */ 2, 3, 2, 2, 2, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0,
142 /* QW-2 POOL */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
143 /* QW-3 PHYS */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
146 static const uint8_t xive_tm_user_view
[] = {
147 /* QW-0 User */ 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
148 /* QW-1 OS */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
149 /* QW-2 POOL */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
150 /* QW-3 PHYS */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
154 * Overall TIMA access map for the thread interrupt management context
157 static const uint8_t *xive_tm_views
[] = {
158 [XIVE_TM_HW_PAGE
] = xive_tm_hw_view
,
159 [XIVE_TM_HV_PAGE
] = xive_tm_hv_view
,
160 [XIVE_TM_OS_PAGE
] = xive_tm_os_view
,
161 [XIVE_TM_USER_PAGE
] = xive_tm_user_view
,
165 * Computes a register access mask for a given offset in the TIMA
167 static uint64_t xive_tm_mask(hwaddr offset
, unsigned size
, bool write
)
169 uint8_t page_offset
= (offset
>> TM_SHIFT
) & 0x3;
170 uint8_t reg_offset
= offset
& 0x3F;
171 uint8_t reg_mask
= write
? 0x1 : 0x2;
175 for (i
= 0; i
< size
; i
++) {
176 if (xive_tm_views
[page_offset
][reg_offset
+ i
] & reg_mask
) {
177 mask
|= (uint64_t) 0xff << (8 * (size
- i
- 1));
184 static void xive_tm_raw_write(XiveTCTX
*tctx
, hwaddr offset
, uint64_t value
,
187 uint8_t ring_offset
= offset
& 0x30;
188 uint8_t reg_offset
= offset
& 0x3F;
189 uint64_t mask
= xive_tm_mask(offset
, size
, true);
193 * Only 4 or 8 bytes stores are allowed and the User ring is
196 if (size
< 4 || !mask
|| ring_offset
== TM_QW0_USER
) {
197 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid write access at TIMA @%"
198 HWADDR_PRIx
"\n", offset
);
203 * Use the register offset for the raw values and filter out
206 for (i
= 0; i
< size
; i
++) {
207 uint8_t byte_mask
= (mask
>> (8 * (size
- i
- 1)));
209 tctx
->regs
[reg_offset
+ i
] = (value
>> (8 * (size
- i
- 1))) &
215 static uint64_t xive_tm_raw_read(XiveTCTX
*tctx
, hwaddr offset
, unsigned size
)
217 uint8_t ring_offset
= offset
& 0x30;
218 uint8_t reg_offset
= offset
& 0x3F;
219 uint64_t mask
= xive_tm_mask(offset
, size
, false);
224 * Only 4 or 8 bytes loads are allowed and the User ring is
227 if (size
< 4 || !mask
|| ring_offset
== TM_QW0_USER
) {
228 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid read access at TIMA @%"
229 HWADDR_PRIx
"\n", offset
);
233 /* Use the register offset for the raw values */
235 for (i
= 0; i
< size
; i
++) {
236 ret
|= (uint64_t) tctx
->regs
[reg_offset
+ i
] << (8 * (size
- i
- 1));
239 /* filter out reserved values */
244 * The TM context is mapped twice within each page. Stores and loads
245 * to the first mapping below 2K write and read the specified values
246 * without modification. The second mapping above 2K performs specific
247 * state changes (side effects) in addition to setting/returning the
248 * interrupt management area context of the processor thread.
250 static uint64_t xive_tm_ack_os_reg(XiveTCTX
*tctx
, hwaddr offset
, unsigned size
)
252 return xive_tctx_accept(tctx
, TM_QW1_OS
);
255 static void xive_tm_set_os_cppr(XiveTCTX
*tctx
, hwaddr offset
,
256 uint64_t value
, unsigned size
)
258 xive_tctx_set_cppr(tctx
, TM_QW1_OS
, value
& 0xff);
262 * Adjust the IPB to allow a CPU to process event queues of other
263 * priorities during one physical interrupt cycle.
265 static void xive_tm_set_os_pending(XiveTCTX
*tctx
, hwaddr offset
,
266 uint64_t value
, unsigned size
)
268 ipb_update(&tctx
->regs
[TM_QW1_OS
], value
& 0xff);
269 xive_tctx_notify(tctx
, TM_QW1_OS
);
273 * Define a mapping of "special" operations depending on the TIMA page
274 * offset and the size of the operation.
276 typedef struct XiveTmOp
{
280 void (*write_handler
)(XiveTCTX
*tctx
, hwaddr offset
, uint64_t value
,
282 uint64_t (*read_handler
)(XiveTCTX
*tctx
, hwaddr offset
, unsigned size
);
285 static const XiveTmOp xive_tm_operations
[] = {
287 * MMIOs below 2K : raw values and special operations without side
290 { XIVE_TM_OS_PAGE
, TM_QW1_OS
+ TM_CPPR
, 1, xive_tm_set_os_cppr
, NULL
},
292 /* MMIOs above 2K : special operations with side effects */
293 { XIVE_TM_OS_PAGE
, TM_SPC_ACK_OS_REG
, 2, NULL
, xive_tm_ack_os_reg
},
294 { XIVE_TM_OS_PAGE
, TM_SPC_SET_OS_PENDING
, 1, xive_tm_set_os_pending
, NULL
},
297 static const XiveTmOp
*xive_tm_find_op(hwaddr offset
, unsigned size
, bool write
)
299 uint8_t page_offset
= (offset
>> TM_SHIFT
) & 0x3;
300 uint32_t op_offset
= offset
& 0xFFF;
303 for (i
= 0; i
< ARRAY_SIZE(xive_tm_operations
); i
++) {
304 const XiveTmOp
*xto
= &xive_tm_operations
[i
];
306 /* Accesses done from a more privileged TIMA page is allowed */
307 if (xto
->page_offset
>= page_offset
&&
308 xto
->op_offset
== op_offset
&&
310 ((write
&& xto
->write_handler
) || (!write
&& xto
->read_handler
))) {
320 static void xive_tm_write(void *opaque
, hwaddr offset
,
321 uint64_t value
, unsigned size
)
323 PowerPCCPU
*cpu
= POWERPC_CPU(current_cpu
);
324 XiveTCTX
*tctx
= XIVE_TCTX(cpu
->intc
);
328 * TODO: check V bit in Q[0-3]W2, check PTER bit associated with CPU
332 * First, check for special operations in the 2K region
334 if (offset
& 0x800) {
335 xto
= xive_tm_find_op(offset
, size
, true);
337 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid write access at TIMA"
338 "@%"HWADDR_PRIx
"\n", offset
);
340 xto
->write_handler(tctx
, offset
, value
, size
);
346 * Then, for special operations in the region below 2K.
348 xto
= xive_tm_find_op(offset
, size
, true);
350 xto
->write_handler(tctx
, offset
, value
, size
);
355 * Finish with raw access to the register values
357 xive_tm_raw_write(tctx
, offset
, value
, size
);
360 static uint64_t xive_tm_read(void *opaque
, hwaddr offset
, unsigned size
)
362 PowerPCCPU
*cpu
= POWERPC_CPU(current_cpu
);
363 XiveTCTX
*tctx
= XIVE_TCTX(cpu
->intc
);
367 * TODO: check V bit in Q[0-3]W2, check PTER bit associated with CPU
371 * First, check for special operations in the 2K region
373 if (offset
& 0x800) {
374 xto
= xive_tm_find_op(offset
, size
, false);
376 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid read access to TIMA"
377 "@%"HWADDR_PRIx
"\n", offset
);
380 return xto
->read_handler(tctx
, offset
, size
);
384 * Then, for special operations in the region below 2K.
386 xto
= xive_tm_find_op(offset
, size
, false);
388 return xto
->read_handler(tctx
, offset
, size
);
392 * Finish with raw access to the register values
394 return xive_tm_raw_read(tctx
, offset
, size
);
397 const MemoryRegionOps xive_tm_ops
= {
398 .read
= xive_tm_read
,
399 .write
= xive_tm_write
,
400 .endianness
= DEVICE_BIG_ENDIAN
,
402 .min_access_size
= 1,
403 .max_access_size
= 8,
406 .min_access_size
= 1,
407 .max_access_size
= 8,
411 static inline uint32_t xive_tctx_word2(uint8_t *ring
)
413 return *((uint32_t *) &ring
[TM_WORD2
]);
416 static char *xive_tctx_ring_print(uint8_t *ring
)
418 uint32_t w2
= xive_tctx_word2(ring
);
420 return g_strdup_printf("%02x %02x %02x %02x %02x "
421 "%02x %02x %02x %08x",
422 ring
[TM_NSR
], ring
[TM_CPPR
], ring
[TM_IPB
], ring
[TM_LSMFB
],
423 ring
[TM_ACK_CNT
], ring
[TM_INC
], ring
[TM_AGE
], ring
[TM_PIPR
],
427 static const char * const xive_tctx_ring_names
[] = {
428 "USER", "OS", "POOL", "PHYS",
431 void xive_tctx_pic_print_info(XiveTCTX
*tctx
, Monitor
*mon
)
433 int cpu_index
= tctx
->cs
? tctx
->cs
->cpu_index
: -1;
436 monitor_printf(mon
, "CPU[%04x]: QW NSR CPPR IPB LSMFB ACK# INC AGE PIPR"
439 for (i
= 0; i
< XIVE_TM_RING_COUNT
; i
++) {
440 char *s
= xive_tctx_ring_print(&tctx
->regs
[i
* XIVE_TM_RING_SIZE
]);
441 monitor_printf(mon
, "CPU[%04x]: %4s %s\n", cpu_index
,
442 xive_tctx_ring_names
[i
], s
);
447 static void xive_tctx_reset(void *dev
)
449 XiveTCTX
*tctx
= XIVE_TCTX(dev
);
451 memset(tctx
->regs
, 0, sizeof(tctx
->regs
));
453 /* Set some defaults */
454 tctx
->regs
[TM_QW1_OS
+ TM_LSMFB
] = 0xFF;
455 tctx
->regs
[TM_QW1_OS
+ TM_ACK_CNT
] = 0xFF;
456 tctx
->regs
[TM_QW1_OS
+ TM_AGE
] = 0xFF;
459 * Initialize PIPR to 0xFF to avoid phantom interrupts when the
462 tctx
->regs
[TM_QW1_OS
+ TM_PIPR
] =
463 ipb_to_pipr(tctx
->regs
[TM_QW1_OS
+ TM_IPB
]);
466 static void xive_tctx_realize(DeviceState
*dev
, Error
**errp
)
468 XiveTCTX
*tctx
= XIVE_TCTX(dev
);
472 Error
*local_err
= NULL
;
474 obj
= object_property_get_link(OBJECT(dev
), "cpu", &local_err
);
476 error_propagate(errp
, local_err
);
477 error_prepend(errp
, "required link 'cpu' not found: ");
481 cpu
= POWERPC_CPU(obj
);
485 switch (PPC_INPUT(env
)) {
486 case PPC_FLAGS_INPUT_POWER7
:
487 tctx
->output
= env
->irq_inputs
[POWER7_INPUT_INT
];
491 error_setg(errp
, "XIVE interrupt controller does not support "
492 "this CPU bus model");
496 qemu_register_reset(xive_tctx_reset
, dev
);
499 static void xive_tctx_unrealize(DeviceState
*dev
, Error
**errp
)
501 qemu_unregister_reset(xive_tctx_reset
, dev
);
504 static const VMStateDescription vmstate_xive_tctx
= {
505 .name
= TYPE_XIVE_TCTX
,
507 .minimum_version_id
= 1,
508 .fields
= (VMStateField
[]) {
509 VMSTATE_BUFFER(regs
, XiveTCTX
),
510 VMSTATE_END_OF_LIST()
514 static void xive_tctx_class_init(ObjectClass
*klass
, void *data
)
516 DeviceClass
*dc
= DEVICE_CLASS(klass
);
518 dc
->desc
= "XIVE Interrupt Thread Context";
519 dc
->realize
= xive_tctx_realize
;
520 dc
->unrealize
= xive_tctx_unrealize
;
521 dc
->vmsd
= &vmstate_xive_tctx
;
524 static const TypeInfo xive_tctx_info
= {
525 .name
= TYPE_XIVE_TCTX
,
526 .parent
= TYPE_DEVICE
,
527 .instance_size
= sizeof(XiveTCTX
),
528 .class_init
= xive_tctx_class_init
,
535 static uint8_t xive_esb_set(uint8_t *pq
, uint8_t value
)
537 uint8_t old_pq
= *pq
& 0x3;
545 static bool xive_esb_trigger(uint8_t *pq
)
547 uint8_t old_pq
= *pq
& 0x3;
551 xive_esb_set(pq
, XIVE_ESB_PENDING
);
553 case XIVE_ESB_PENDING
:
554 case XIVE_ESB_QUEUED
:
555 xive_esb_set(pq
, XIVE_ESB_QUEUED
);
558 xive_esb_set(pq
, XIVE_ESB_OFF
);
561 g_assert_not_reached();
565 static bool xive_esb_eoi(uint8_t *pq
)
567 uint8_t old_pq
= *pq
& 0x3;
571 case XIVE_ESB_PENDING
:
572 xive_esb_set(pq
, XIVE_ESB_RESET
);
574 case XIVE_ESB_QUEUED
:
575 xive_esb_set(pq
, XIVE_ESB_PENDING
);
578 xive_esb_set(pq
, XIVE_ESB_OFF
);
581 g_assert_not_reached();
586 * XIVE Interrupt Source (or IVSE)
589 uint8_t xive_source_esb_get(XiveSource
*xsrc
, uint32_t srcno
)
591 assert(srcno
< xsrc
->nr_irqs
);
593 return xsrc
->status
[srcno
] & 0x3;
596 uint8_t xive_source_esb_set(XiveSource
*xsrc
, uint32_t srcno
, uint8_t pq
)
598 assert(srcno
< xsrc
->nr_irqs
);
600 return xive_esb_set(&xsrc
->status
[srcno
], pq
);
604 * Returns whether the event notification should be forwarded.
606 static bool xive_source_lsi_trigger(XiveSource
*xsrc
, uint32_t srcno
)
608 uint8_t old_pq
= xive_source_esb_get(xsrc
, srcno
);
610 xsrc
->status
[srcno
] |= XIVE_STATUS_ASSERTED
;
614 xive_source_esb_set(xsrc
, srcno
, XIVE_ESB_PENDING
);
622 * Returns whether the event notification should be forwarded.
624 static bool xive_source_esb_trigger(XiveSource
*xsrc
, uint32_t srcno
)
628 assert(srcno
< xsrc
->nr_irqs
);
630 ret
= xive_esb_trigger(&xsrc
->status
[srcno
]);
632 if (xive_source_irq_is_lsi(xsrc
, srcno
) &&
633 xive_source_esb_get(xsrc
, srcno
) == XIVE_ESB_QUEUED
) {
634 qemu_log_mask(LOG_GUEST_ERROR
,
635 "XIVE: queued an event on LSI IRQ %d\n", srcno
);
642 * Returns whether the event notification should be forwarded.
644 static bool xive_source_esb_eoi(XiveSource
*xsrc
, uint32_t srcno
)
648 assert(srcno
< xsrc
->nr_irqs
);
650 ret
= xive_esb_eoi(&xsrc
->status
[srcno
]);
653 * LSI sources do not set the Q bit but they can still be
654 * asserted, in which case we should forward a new event
657 if (xive_source_irq_is_lsi(xsrc
, srcno
) &&
658 xsrc
->status
[srcno
] & XIVE_STATUS_ASSERTED
) {
659 ret
= xive_source_lsi_trigger(xsrc
, srcno
);
666 * Forward the source event notification to the Router
668 static void xive_source_notify(XiveSource
*xsrc
, int srcno
)
670 XiveNotifierClass
*xnc
= XIVE_NOTIFIER_GET_CLASS(xsrc
->xive
);
673 xnc
->notify(xsrc
->xive
, srcno
);
678 * In a two pages ESB MMIO setting, even page is the trigger page, odd
679 * page is for management
681 static inline bool addr_is_even(hwaddr addr
, uint32_t shift
)
683 return !((addr
>> shift
) & 1);
686 static inline bool xive_source_is_trigger_page(XiveSource
*xsrc
, hwaddr addr
)
688 return xive_source_esb_has_2page(xsrc
) &&
689 addr_is_even(addr
, xsrc
->esb_shift
- 1);
694 * Trigger page Management/EOI page
696 * ESB MMIO setting 2 pages 1 or 2 pages
698 * 0x000 .. 0x3FF -1 EOI and return 0|1
699 * 0x400 .. 0x7FF -1 EOI and return 0|1
700 * 0x800 .. 0xBFF -1 return PQ
701 * 0xC00 .. 0xCFF -1 return PQ and atomically PQ=00
702 * 0xD00 .. 0xDFF -1 return PQ and atomically PQ=01
703 * 0xE00 .. 0xDFF -1 return PQ and atomically PQ=10
704 * 0xF00 .. 0xDFF -1 return PQ and atomically PQ=11
706 static uint64_t xive_source_esb_read(void *opaque
, hwaddr addr
, unsigned size
)
708 XiveSource
*xsrc
= XIVE_SOURCE(opaque
);
709 uint32_t offset
= addr
& 0xFFF;
710 uint32_t srcno
= addr
>> xsrc
->esb_shift
;
713 /* In a two pages ESB MMIO setting, trigger page should not be read */
714 if (xive_source_is_trigger_page(xsrc
, addr
)) {
715 qemu_log_mask(LOG_GUEST_ERROR
,
716 "XIVE: invalid load on IRQ %d trigger page at "
717 "0x%"HWADDR_PRIx
"\n", srcno
, addr
);
722 case XIVE_ESB_LOAD_EOI
... XIVE_ESB_LOAD_EOI
+ 0x7FF:
723 ret
= xive_source_esb_eoi(xsrc
, srcno
);
725 /* Forward the source event notification for routing */
727 xive_source_notify(xsrc
, srcno
);
731 case XIVE_ESB_GET
... XIVE_ESB_GET
+ 0x3FF:
732 ret
= xive_source_esb_get(xsrc
, srcno
);
735 case XIVE_ESB_SET_PQ_00
... XIVE_ESB_SET_PQ_00
+ 0x0FF:
736 case XIVE_ESB_SET_PQ_01
... XIVE_ESB_SET_PQ_01
+ 0x0FF:
737 case XIVE_ESB_SET_PQ_10
... XIVE_ESB_SET_PQ_10
+ 0x0FF:
738 case XIVE_ESB_SET_PQ_11
... XIVE_ESB_SET_PQ_11
+ 0x0FF:
739 ret
= xive_source_esb_set(xsrc
, srcno
, (offset
>> 8) & 0x3);
742 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid ESB load addr %x\n",
751 * Trigger page Management/EOI page
753 * ESB MMIO setting 2 pages 1 or 2 pages
755 * 0x000 .. 0x3FF Trigger Trigger
756 * 0x400 .. 0x7FF Trigger EOI
757 * 0x800 .. 0xBFF Trigger undefined
758 * 0xC00 .. 0xCFF Trigger PQ=00
759 * 0xD00 .. 0xDFF Trigger PQ=01
760 * 0xE00 .. 0xDFF Trigger PQ=10
761 * 0xF00 .. 0xDFF Trigger PQ=11
763 static void xive_source_esb_write(void *opaque
, hwaddr addr
,
764 uint64_t value
, unsigned size
)
766 XiveSource
*xsrc
= XIVE_SOURCE(opaque
);
767 uint32_t offset
= addr
& 0xFFF;
768 uint32_t srcno
= addr
>> xsrc
->esb_shift
;
771 /* In a two pages ESB MMIO setting, trigger page only triggers */
772 if (xive_source_is_trigger_page(xsrc
, addr
)) {
773 notify
= xive_source_esb_trigger(xsrc
, srcno
);
779 notify
= xive_source_esb_trigger(xsrc
, srcno
);
782 case XIVE_ESB_STORE_EOI
... XIVE_ESB_STORE_EOI
+ 0x3FF:
783 if (!(xsrc
->esb_flags
& XIVE_SRC_STORE_EOI
)) {
784 qemu_log_mask(LOG_GUEST_ERROR
,
785 "XIVE: invalid Store EOI for IRQ %d\n", srcno
);
789 notify
= xive_source_esb_eoi(xsrc
, srcno
);
792 case XIVE_ESB_SET_PQ_00
... XIVE_ESB_SET_PQ_00
+ 0x0FF:
793 case XIVE_ESB_SET_PQ_01
... XIVE_ESB_SET_PQ_01
+ 0x0FF:
794 case XIVE_ESB_SET_PQ_10
... XIVE_ESB_SET_PQ_10
+ 0x0FF:
795 case XIVE_ESB_SET_PQ_11
... XIVE_ESB_SET_PQ_11
+ 0x0FF:
796 xive_source_esb_set(xsrc
, srcno
, (offset
>> 8) & 0x3);
800 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid ESB write addr %x\n",
806 /* Forward the source event notification for routing */
808 xive_source_notify(xsrc
, srcno
);
812 static const MemoryRegionOps xive_source_esb_ops
= {
813 .read
= xive_source_esb_read
,
814 .write
= xive_source_esb_write
,
815 .endianness
= DEVICE_BIG_ENDIAN
,
817 .min_access_size
= 8,
818 .max_access_size
= 8,
821 .min_access_size
= 8,
822 .max_access_size
= 8,
826 static void xive_source_set_irq(void *opaque
, int srcno
, int val
)
828 XiveSource
*xsrc
= XIVE_SOURCE(opaque
);
831 if (xive_source_irq_is_lsi(xsrc
, srcno
)) {
833 notify
= xive_source_lsi_trigger(xsrc
, srcno
);
835 xsrc
->status
[srcno
] &= ~XIVE_STATUS_ASSERTED
;
839 notify
= xive_source_esb_trigger(xsrc
, srcno
);
843 /* Forward the source event notification for routing */
845 xive_source_notify(xsrc
, srcno
);
849 void xive_source_pic_print_info(XiveSource
*xsrc
, uint32_t offset
, Monitor
*mon
)
853 for (i
= 0; i
< xsrc
->nr_irqs
; i
++) {
854 uint8_t pq
= xive_source_esb_get(xsrc
, i
);
856 if (pq
== XIVE_ESB_OFF
) {
860 monitor_printf(mon
, " %08x %s %c%c%c\n", i
+ offset
,
861 xive_source_irq_is_lsi(xsrc
, i
) ? "LSI" : "MSI",
862 pq
& XIVE_ESB_VAL_P
? 'P' : '-',
863 pq
& XIVE_ESB_VAL_Q
? 'Q' : '-',
864 xsrc
->status
[i
] & XIVE_STATUS_ASSERTED
? 'A' : ' ');
868 static void xive_source_reset(void *dev
)
870 XiveSource
*xsrc
= XIVE_SOURCE(dev
);
872 /* Do not clear the LSI bitmap */
874 /* PQs are initialized to 0b01 (Q=1) which corresponds to "ints off" */
875 memset(xsrc
->status
, XIVE_ESB_OFF
, xsrc
->nr_irqs
);
878 static void xive_source_realize(DeviceState
*dev
, Error
**errp
)
880 XiveSource
*xsrc
= XIVE_SOURCE(dev
);
882 Error
*local_err
= NULL
;
884 obj
= object_property_get_link(OBJECT(dev
), "xive", &local_err
);
886 error_propagate(errp
, local_err
);
887 error_prepend(errp
, "required link 'xive' not found: ");
891 xsrc
->xive
= XIVE_NOTIFIER(obj
);
893 if (!xsrc
->nr_irqs
) {
894 error_setg(errp
, "Number of interrupt needs to be greater than 0");
898 if (xsrc
->esb_shift
!= XIVE_ESB_4K
&&
899 xsrc
->esb_shift
!= XIVE_ESB_4K_2PAGE
&&
900 xsrc
->esb_shift
!= XIVE_ESB_64K
&&
901 xsrc
->esb_shift
!= XIVE_ESB_64K_2PAGE
) {
902 error_setg(errp
, "Invalid ESB shift setting");
906 xsrc
->status
= g_malloc0(xsrc
->nr_irqs
);
907 xsrc
->lsi_map
= bitmap_new(xsrc
->nr_irqs
);
909 memory_region_init_io(&xsrc
->esb_mmio
, OBJECT(xsrc
),
910 &xive_source_esb_ops
, xsrc
, "xive.esb",
911 (1ull << xsrc
->esb_shift
) * xsrc
->nr_irqs
);
913 xsrc
->qirqs
= qemu_allocate_irqs(xive_source_set_irq
, xsrc
,
916 qemu_register_reset(xive_source_reset
, dev
);
919 static const VMStateDescription vmstate_xive_source
= {
920 .name
= TYPE_XIVE_SOURCE
,
922 .minimum_version_id
= 1,
923 .fields
= (VMStateField
[]) {
924 VMSTATE_UINT32_EQUAL(nr_irqs
, XiveSource
, NULL
),
925 VMSTATE_VBUFFER_UINT32(status
, XiveSource
, 1, NULL
, nr_irqs
),
926 VMSTATE_END_OF_LIST()
931 * The default XIVE interrupt source setting for the ESB MMIOs is two
932 * 64k pages without Store EOI, to be in sync with KVM.
934 static Property xive_source_properties
[] = {
935 DEFINE_PROP_UINT64("flags", XiveSource
, esb_flags
, 0),
936 DEFINE_PROP_UINT32("nr-irqs", XiveSource
, nr_irqs
, 0),
937 DEFINE_PROP_UINT32("shift", XiveSource
, esb_shift
, XIVE_ESB_64K_2PAGE
),
938 DEFINE_PROP_END_OF_LIST(),
941 static void xive_source_class_init(ObjectClass
*klass
, void *data
)
943 DeviceClass
*dc
= DEVICE_CLASS(klass
);
945 dc
->desc
= "XIVE Interrupt Source";
946 dc
->props
= xive_source_properties
;
947 dc
->realize
= xive_source_realize
;
948 dc
->vmsd
= &vmstate_xive_source
;
951 static const TypeInfo xive_source_info
= {
952 .name
= TYPE_XIVE_SOURCE
,
953 .parent
= TYPE_DEVICE
,
954 .instance_size
= sizeof(XiveSource
),
955 .class_init
= xive_source_class_init
,
962 void xive_end_queue_pic_print_info(XiveEND
*end
, uint32_t width
, Monitor
*mon
)
964 uint64_t qaddr_base
= (uint64_t) be32_to_cpu(end
->w2
& 0x0fffffff) << 32
965 | be32_to_cpu(end
->w3
);
966 uint32_t qsize
= xive_get_field32(END_W0_QSIZE
, end
->w0
);
967 uint32_t qindex
= xive_get_field32(END_W1_PAGE_OFF
, end
->w1
);
968 uint32_t qentries
= 1 << (qsize
+ 10);
972 * print out the [ (qindex - (width - 1)) .. (qindex + 1)] window
974 monitor_printf(mon
, " [ ");
975 qindex
= (qindex
- (width
- 1)) & (qentries
- 1);
976 for (i
= 0; i
< width
; i
++) {
977 uint64_t qaddr
= qaddr_base
+ (qindex
<< 2);
980 if (dma_memory_read(&address_space_memory
, qaddr
, &qdata
,
982 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: failed to read EQ @0x%"
983 HWADDR_PRIx
"\n", qaddr
);
986 monitor_printf(mon
, "%s%08x ", i
== width
- 1 ? "^" : "",
988 qindex
= (qindex
+ 1) & (qentries
- 1);
992 void xive_end_pic_print_info(XiveEND
*end
, uint32_t end_idx
, Monitor
*mon
)
994 uint64_t qaddr_base
= (uint64_t) be32_to_cpu(end
->w2
& 0x0fffffff) << 32
995 | be32_to_cpu(end
->w3
);
996 uint32_t qindex
= xive_get_field32(END_W1_PAGE_OFF
, end
->w1
);
997 uint32_t qgen
= xive_get_field32(END_W1_GENERATION
, end
->w1
);
998 uint32_t qsize
= xive_get_field32(END_W0_QSIZE
, end
->w0
);
999 uint32_t qentries
= 1 << (qsize
+ 10);
1001 uint32_t nvt
= xive_get_field32(END_W6_NVT_INDEX
, end
->w6
);
1002 uint8_t priority
= xive_get_field32(END_W7_F0_PRIORITY
, end
->w7
);
1004 if (!xive_end_is_valid(end
)) {
1008 monitor_printf(mon
, " %08x %c%c%c%c%c prio:%d nvt:%04x eq:@%08"PRIx64
1009 "% 6d/%5d ^%d", end_idx
,
1010 xive_end_is_valid(end
) ? 'v' : '-',
1011 xive_end_is_enqueue(end
) ? 'q' : '-',
1012 xive_end_is_notify(end
) ? 'n' : '-',
1013 xive_end_is_backlog(end
) ? 'b' : '-',
1014 xive_end_is_escalate(end
) ? 'e' : '-',
1015 priority
, nvt
, qaddr_base
, qindex
, qentries
, qgen
);
1017 xive_end_queue_pic_print_info(end
, 6, mon
);
1018 monitor_printf(mon
, "]\n");
1021 static void xive_end_enqueue(XiveEND
*end
, uint32_t data
)
1023 uint64_t qaddr_base
= (uint64_t) be32_to_cpu(end
->w2
& 0x0fffffff) << 32
1024 | be32_to_cpu(end
->w3
);
1025 uint32_t qsize
= xive_get_field32(END_W0_QSIZE
, end
->w0
);
1026 uint32_t qindex
= xive_get_field32(END_W1_PAGE_OFF
, end
->w1
);
1027 uint32_t qgen
= xive_get_field32(END_W1_GENERATION
, end
->w1
);
1029 uint64_t qaddr
= qaddr_base
+ (qindex
<< 2);
1030 uint32_t qdata
= cpu_to_be32((qgen
<< 31) | (data
& 0x7fffffff));
1031 uint32_t qentries
= 1 << (qsize
+ 10);
1033 if (dma_memory_write(&address_space_memory
, qaddr
, &qdata
, sizeof(qdata
))) {
1034 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: failed to write END data @0x%"
1035 HWADDR_PRIx
"\n", qaddr
);
1039 qindex
= (qindex
+ 1) & (qentries
- 1);
1042 end
->w1
= xive_set_field32(END_W1_GENERATION
, end
->w1
, qgen
);
1044 end
->w1
= xive_set_field32(END_W1_PAGE_OFF
, end
->w1
, qindex
);
1048 * XIVE Router (aka. Virtualization Controller or IVRE)
1051 int xive_router_get_eas(XiveRouter
*xrtr
, uint8_t eas_blk
, uint32_t eas_idx
,
1054 XiveRouterClass
*xrc
= XIVE_ROUTER_GET_CLASS(xrtr
);
1056 return xrc
->get_eas(xrtr
, eas_blk
, eas_idx
, eas
);
1059 int xive_router_get_end(XiveRouter
*xrtr
, uint8_t end_blk
, uint32_t end_idx
,
1062 XiveRouterClass
*xrc
= XIVE_ROUTER_GET_CLASS(xrtr
);
1064 return xrc
->get_end(xrtr
, end_blk
, end_idx
, end
);
1067 int xive_router_write_end(XiveRouter
*xrtr
, uint8_t end_blk
, uint32_t end_idx
,
1068 XiveEND
*end
, uint8_t word_number
)
1070 XiveRouterClass
*xrc
= XIVE_ROUTER_GET_CLASS(xrtr
);
1072 return xrc
->write_end(xrtr
, end_blk
, end_idx
, end
, word_number
);
1075 int xive_router_get_nvt(XiveRouter
*xrtr
, uint8_t nvt_blk
, uint32_t nvt_idx
,
1078 XiveRouterClass
*xrc
= XIVE_ROUTER_GET_CLASS(xrtr
);
1080 return xrc
->get_nvt(xrtr
, nvt_blk
, nvt_idx
, nvt
);
1083 int xive_router_write_nvt(XiveRouter
*xrtr
, uint8_t nvt_blk
, uint32_t nvt_idx
,
1084 XiveNVT
*nvt
, uint8_t word_number
)
1086 XiveRouterClass
*xrc
= XIVE_ROUTER_GET_CLASS(xrtr
);
1088 return xrc
->write_nvt(xrtr
, nvt_blk
, nvt_idx
, nvt
, word_number
);
1092 * The thread context register words are in big-endian format.
1094 static int xive_presenter_tctx_match(XiveTCTX
*tctx
, uint8_t format
,
1095 uint8_t nvt_blk
, uint32_t nvt_idx
,
1096 bool cam_ignore
, uint32_t logic_serv
)
1098 uint32_t cam
= xive_nvt_cam_line(nvt_blk
, nvt_idx
);
1099 uint32_t qw2w2
= xive_tctx_word2(&tctx
->regs
[TM_QW2_HV_POOL
]);
1100 uint32_t qw1w2
= xive_tctx_word2(&tctx
->regs
[TM_QW1_OS
]);
1101 uint32_t qw0w2
= xive_tctx_word2(&tctx
->regs
[TM_QW0_USER
]);
1104 * TODO (PowerNV): ignore mode. The low order bits of the NVT
1105 * identifier are ignored in the "CAM" match.
1109 if (cam_ignore
== true) {
1111 * F=0 & i=1: Logical server notification (bits ignored at
1112 * the end of the NVT identifier)
1114 qemu_log_mask(LOG_UNIMP
, "XIVE: no support for LS NVT %x/%x\n",
1119 /* F=0 & i=0: Specific NVT notification */
1121 /* TODO (PowerNV) : PHYS ring */
1124 if ((be32_to_cpu(qw2w2
) & TM_QW2W2_VP
) &&
1125 cam
== xive_get_field32(TM_QW2W2_POOL_CAM
, qw2w2
)) {
1126 return TM_QW2_HV_POOL
;
1130 if ((be32_to_cpu(qw1w2
) & TM_QW1W2_VO
) &&
1131 cam
== xive_get_field32(TM_QW1W2_OS_CAM
, qw1w2
)) {
1135 /* F=1 : User level Event-Based Branch (EBB) notification */
1138 if ((be32_to_cpu(qw1w2
) & TM_QW1W2_VO
) &&
1139 (cam
== xive_get_field32(TM_QW1W2_OS_CAM
, qw1w2
)) &&
1140 (be32_to_cpu(qw0w2
) & TM_QW0W2_VU
) &&
1141 (logic_serv
== xive_get_field32(TM_QW0W2_LOGIC_SERV
, qw0w2
))) {
1148 typedef struct XiveTCTXMatch
{
1153 static bool xive_presenter_match(XiveRouter
*xrtr
, uint8_t format
,
1154 uint8_t nvt_blk
, uint32_t nvt_idx
,
1155 bool cam_ignore
, uint8_t priority
,
1156 uint32_t logic_serv
, XiveTCTXMatch
*match
)
1161 * TODO (PowerNV): handle chip_id overwrite of block field for
1162 * hardwired CAM compares
1166 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
1167 XiveTCTX
*tctx
= XIVE_TCTX(cpu
->intc
);
1171 * HW checks that the CPU is enabled in the Physical Thread
1172 * Enable Register (PTER).
1176 * Check the thread context CAM lines and record matches. We
1177 * will handle CPU exception delivery later
1179 ring
= xive_presenter_tctx_match(tctx
, format
, nvt_blk
, nvt_idx
,
1180 cam_ignore
, logic_serv
);
1182 * Save the context and follow on to catch duplicates, that we
1183 * don't support yet.
1187 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: already found a thread "
1188 "context NVT %x/%x\n", nvt_blk
, nvt_idx
);
1198 qemu_log_mask(LOG_UNIMP
, "XIVE: NVT %x/%x is not dispatched\n",
1207 * This is our simple Xive Presenter Engine model. It is merged in the
1208 * Router as it does not require an extra object.
1210 * It receives notification requests sent by the IVRE to find one
1211 * matching NVT (or more) dispatched on the processor threads. In case
1212 * of a single NVT notification, the process is abreviated and the
1213 * thread is signaled if a match is found. In case of a logical server
1214 * notification (bits ignored at the end of the NVT identifier), the
1215 * IVPE and IVRE select a winning thread using different filters. This
1216 * involves 2 or 3 exchanges on the PowerBus that the model does not
1219 * The parameters represent what is sent on the PowerBus
1221 static void xive_presenter_notify(XiveRouter
*xrtr
, uint8_t format
,
1222 uint8_t nvt_blk
, uint32_t nvt_idx
,
1223 bool cam_ignore
, uint8_t priority
,
1224 uint32_t logic_serv
)
1227 XiveTCTXMatch match
= { .tctx
= NULL
, .ring
= 0 };
1230 /* NVT cache lookup */
1231 if (xive_router_get_nvt(xrtr
, nvt_blk
, nvt_idx
, &nvt
)) {
1232 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: no NVT %x/%x\n",
1237 if (!xive_nvt_is_valid(&nvt
)) {
1238 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: NVT %x/%x is invalid\n",
1243 found
= xive_presenter_match(xrtr
, format
, nvt_blk
, nvt_idx
, cam_ignore
,
1244 priority
, logic_serv
, &match
);
1246 ipb_update(&match
.tctx
->regs
[match
.ring
], priority
);
1247 xive_tctx_notify(match
.tctx
, match
.ring
);
1251 /* Record the IPB in the associated NVT structure */
1252 ipb_update((uint8_t *) &nvt
.w4
, priority
);
1253 xive_router_write_nvt(xrtr
, nvt_blk
, nvt_idx
, &nvt
, 4);
1256 * If no matching NVT is dispatched on a HW thread :
1257 * - update the NVT structure if backlog is activated
1258 * - escalate (ESe PQ bits and EAS in w4-5) if escalation is
1264 * An END trigger can come from an event trigger (IPI or HW) or from
1265 * another chip. We don't model the PowerBus but the END trigger
1266 * message has the same parameters than in the function below.
1268 static void xive_router_end_notify(XiveRouter
*xrtr
, uint8_t end_blk
,
1269 uint32_t end_idx
, uint32_t end_data
)
1275 /* END cache lookup */
1276 if (xive_router_get_end(xrtr
, end_blk
, end_idx
, &end
)) {
1277 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: No END %x/%x\n", end_blk
,
1282 if (!xive_end_is_valid(&end
)) {
1283 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: END %x/%x is invalid\n",
1288 if (xive_end_is_enqueue(&end
)) {
1289 xive_end_enqueue(&end
, end_data
);
1290 /* Enqueuing event data modifies the EQ toggle and index */
1291 xive_router_write_end(xrtr
, end_blk
, end_idx
, &end
, 1);
1295 * The W7 format depends on the F bit in W6. It defines the type
1296 * of the notification :
1298 * F=0 : single or multiple NVT notification
1299 * F=1 : User level Event-Based Branch (EBB) notification, no
1302 format
= xive_get_field32(END_W6_FORMAT_BIT
, end
.w6
);
1303 priority
= xive_get_field32(END_W7_F0_PRIORITY
, end
.w7
);
1305 /* The END is masked */
1306 if (format
== 0 && priority
== 0xff) {
1311 * Check the END ESn (Event State Buffer for notification) for
1312 * even futher coalescing in the Router
1314 if (!xive_end_is_notify(&end
)) {
1315 uint8_t pq
= xive_get_field32(END_W1_ESn
, end
.w1
);
1316 bool notify
= xive_esb_trigger(&pq
);
1318 if (pq
!= xive_get_field32(END_W1_ESn
, end
.w1
)) {
1319 end
.w1
= xive_set_field32(END_W1_ESn
, end
.w1
, pq
);
1320 xive_router_write_end(xrtr
, end_blk
, end_idx
, &end
, 1);
1323 /* ESn[Q]=1 : end of notification */
1330 * Follows IVPE notification
1332 xive_presenter_notify(xrtr
, format
,
1333 xive_get_field32(END_W6_NVT_BLOCK
, end
.w6
),
1334 xive_get_field32(END_W6_NVT_INDEX
, end
.w6
),
1335 xive_get_field32(END_W7_F0_IGNORE
, end
.w7
),
1337 xive_get_field32(END_W7_F1_LOG_SERVER_ID
, end
.w7
));
1339 /* TODO: Auto EOI. */
1342 static void xive_router_notify(XiveNotifier
*xn
, uint32_t lisn
)
1344 XiveRouter
*xrtr
= XIVE_ROUTER(xn
);
1345 uint8_t eas_blk
= XIVE_SRCNO_BLOCK(lisn
);
1346 uint32_t eas_idx
= XIVE_SRCNO_INDEX(lisn
);
1349 /* EAS cache lookup */
1350 if (xive_router_get_eas(xrtr
, eas_blk
, eas_idx
, &eas
)) {
1351 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: Unknown LISN %x\n", lisn
);
1356 * The IVRE checks the State Bit Cache at this point. We skip the
1357 * SBC lookup because the state bits of the sources are modeled
1358 * internally in QEMU.
1361 if (!xive_eas_is_valid(&eas
)) {
1362 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid LISN %x\n", lisn
);
1366 if (xive_eas_is_masked(&eas
)) {
1367 /* Notification completed */
1372 * The event trigger becomes an END trigger
1374 xive_router_end_notify(xrtr
,
1375 xive_get_field64(EAS_END_BLOCK
, eas
.w
),
1376 xive_get_field64(EAS_END_INDEX
, eas
.w
),
1377 xive_get_field64(EAS_END_DATA
, eas
.w
));
1380 static void xive_router_class_init(ObjectClass
*klass
, void *data
)
1382 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1383 XiveNotifierClass
*xnc
= XIVE_NOTIFIER_CLASS(klass
);
1385 dc
->desc
= "XIVE Router Engine";
1386 xnc
->notify
= xive_router_notify
;
1389 static const TypeInfo xive_router_info
= {
1390 .name
= TYPE_XIVE_ROUTER
,
1391 .parent
= TYPE_SYS_BUS_DEVICE
,
1393 .class_size
= sizeof(XiveRouterClass
),
1394 .class_init
= xive_router_class_init
,
1395 .interfaces
= (InterfaceInfo
[]) {
1396 { TYPE_XIVE_NOTIFIER
},
1401 void xive_eas_pic_print_info(XiveEAS
*eas
, uint32_t lisn
, Monitor
*mon
)
1403 if (!xive_eas_is_valid(eas
)) {
1407 monitor_printf(mon
, " %08x %s end:%02x/%04x data:%08x\n",
1408 lisn
, xive_eas_is_masked(eas
) ? "M" : " ",
1409 (uint8_t) xive_get_field64(EAS_END_BLOCK
, eas
->w
),
1410 (uint32_t) xive_get_field64(EAS_END_INDEX
, eas
->w
),
1411 (uint32_t) xive_get_field64(EAS_END_DATA
, eas
->w
));
1415 * END ESB MMIO loads
1417 static uint64_t xive_end_source_read(void *opaque
, hwaddr addr
, unsigned size
)
1419 XiveENDSource
*xsrc
= XIVE_END_SOURCE(opaque
);
1420 uint32_t offset
= addr
& 0xFFF;
1424 uint32_t end_esmask
;
1428 end_blk
= xsrc
->block_id
;
1429 end_idx
= addr
>> (xsrc
->esb_shift
+ 1);
1431 if (xive_router_get_end(xsrc
->xrtr
, end_blk
, end_idx
, &end
)) {
1432 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: No END %x/%x\n", end_blk
,
1437 if (!xive_end_is_valid(&end
)) {
1438 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: END %x/%x is invalid\n",
1443 end_esmask
= addr_is_even(addr
, xsrc
->esb_shift
) ? END_W1_ESn
: END_W1_ESe
;
1444 pq
= xive_get_field32(end_esmask
, end
.w1
);
1447 case XIVE_ESB_LOAD_EOI
... XIVE_ESB_LOAD_EOI
+ 0x7FF:
1448 ret
= xive_esb_eoi(&pq
);
1450 /* Forward the source event notification for routing ?? */
1453 case XIVE_ESB_GET
... XIVE_ESB_GET
+ 0x3FF:
1457 case XIVE_ESB_SET_PQ_00
... XIVE_ESB_SET_PQ_00
+ 0x0FF:
1458 case XIVE_ESB_SET_PQ_01
... XIVE_ESB_SET_PQ_01
+ 0x0FF:
1459 case XIVE_ESB_SET_PQ_10
... XIVE_ESB_SET_PQ_10
+ 0x0FF:
1460 case XIVE_ESB_SET_PQ_11
... XIVE_ESB_SET_PQ_11
+ 0x0FF:
1461 ret
= xive_esb_set(&pq
, (offset
>> 8) & 0x3);
1464 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid END ESB load addr %d\n",
1469 if (pq
!= xive_get_field32(end_esmask
, end
.w1
)) {
1470 end
.w1
= xive_set_field32(end_esmask
, end
.w1
, pq
);
1471 xive_router_write_end(xsrc
->xrtr
, end_blk
, end_idx
, &end
, 1);
1478 * END ESB MMIO stores are invalid
1480 static void xive_end_source_write(void *opaque
, hwaddr addr
,
1481 uint64_t value
, unsigned size
)
1483 qemu_log_mask(LOG_GUEST_ERROR
, "XIVE: invalid ESB write addr 0x%"
1484 HWADDR_PRIx
"\n", addr
);
1487 static const MemoryRegionOps xive_end_source_ops
= {
1488 .read
= xive_end_source_read
,
1489 .write
= xive_end_source_write
,
1490 .endianness
= DEVICE_BIG_ENDIAN
,
1492 .min_access_size
= 8,
1493 .max_access_size
= 8,
1496 .min_access_size
= 8,
1497 .max_access_size
= 8,
1501 static void xive_end_source_realize(DeviceState
*dev
, Error
**errp
)
1503 XiveENDSource
*xsrc
= XIVE_END_SOURCE(dev
);
1505 Error
*local_err
= NULL
;
1507 obj
= object_property_get_link(OBJECT(dev
), "xive", &local_err
);
1509 error_propagate(errp
, local_err
);
1510 error_prepend(errp
, "required link 'xive' not found: ");
1514 xsrc
->xrtr
= XIVE_ROUTER(obj
);
1516 if (!xsrc
->nr_ends
) {
1517 error_setg(errp
, "Number of interrupt needs to be greater than 0");
1521 if (xsrc
->esb_shift
!= XIVE_ESB_4K
&&
1522 xsrc
->esb_shift
!= XIVE_ESB_64K
) {
1523 error_setg(errp
, "Invalid ESB shift setting");
1528 * Each END is assigned an even/odd pair of MMIO pages, the even page
1529 * manages the ESn field while the odd page manages the ESe field.
1531 memory_region_init_io(&xsrc
->esb_mmio
, OBJECT(xsrc
),
1532 &xive_end_source_ops
, xsrc
, "xive.end",
1533 (1ull << (xsrc
->esb_shift
+ 1)) * xsrc
->nr_ends
);
1536 static Property xive_end_source_properties
[] = {
1537 DEFINE_PROP_UINT8("block-id", XiveENDSource
, block_id
, 0),
1538 DEFINE_PROP_UINT32("nr-ends", XiveENDSource
, nr_ends
, 0),
1539 DEFINE_PROP_UINT32("shift", XiveENDSource
, esb_shift
, XIVE_ESB_64K
),
1540 DEFINE_PROP_END_OF_LIST(),
1543 static void xive_end_source_class_init(ObjectClass
*klass
, void *data
)
1545 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1547 dc
->desc
= "XIVE END Source";
1548 dc
->props
= xive_end_source_properties
;
1549 dc
->realize
= xive_end_source_realize
;
1552 static const TypeInfo xive_end_source_info
= {
1553 .name
= TYPE_XIVE_END_SOURCE
,
1554 .parent
= TYPE_DEVICE
,
1555 .instance_size
= sizeof(XiveENDSource
),
1556 .class_init
= xive_end_source_class_init
,
1562 static const TypeInfo xive_fabric_info
= {
1563 .name
= TYPE_XIVE_NOTIFIER
,
1564 .parent
= TYPE_INTERFACE
,
1565 .class_size
= sizeof(XiveNotifierClass
),
1568 static void xive_register_types(void)
1570 type_register_static(&xive_source_info
);
1571 type_register_static(&xive_fabric_info
);
1572 type_register_static(&xive_router_info
);
1573 type_register_static(&xive_end_source_info
);
1574 type_register_static(&xive_tctx_info
);
1577 type_init(xive_register_types
)