2 * QEMU PowerPC sPAPR IRQ interface
4 * Copyright (c) 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 "qemu/error-report.h"
13 #include "qapi/error.h"
14 #include "hw/ppc/spapr.h"
15 #include "hw/ppc/spapr_xive.h"
16 #include "hw/ppc/xics.h"
17 #include "sysemu/kvm.h"
21 void spapr_irq_msi_init(sPAPRMachineState
*spapr
, uint32_t nr_msis
)
23 spapr
->irq_map_nr
= nr_msis
;
24 spapr
->irq_map
= bitmap_new(spapr
->irq_map_nr
);
27 int spapr_irq_msi_alloc(sPAPRMachineState
*spapr
, uint32_t num
, bool align
,
33 * The 'align_mask' parameter of bitmap_find_next_zero_area()
34 * should be one less than a power of 2; 0 means no
35 * alignment. Adapt the 'align' value of the former allocator
36 * to fit the requirements of bitmap_find_next_zero_area()
40 irq
= bitmap_find_next_zero_area(spapr
->irq_map
, spapr
->irq_map_nr
, 0, num
,
42 if (irq
== spapr
->irq_map_nr
) {
43 error_setg(errp
, "can't find a free %d-IRQ block", num
);
47 bitmap_set(spapr
->irq_map
, irq
, num
);
49 return irq
+ SPAPR_IRQ_MSI
;
52 void spapr_irq_msi_free(sPAPRMachineState
*spapr
, int irq
, uint32_t num
)
54 bitmap_clear(spapr
->irq_map
, irq
- SPAPR_IRQ_MSI
, num
);
57 void spapr_irq_msi_reset(sPAPRMachineState
*spapr
)
59 bitmap_clear(spapr
->irq_map
, 0, spapr
->irq_map_nr
);
67 static ICSState
*spapr_ics_create(sPAPRMachineState
*spapr
,
69 int nr_irqs
, Error
**errp
)
71 Error
*local_err
= NULL
;
74 obj
= object_new(type_ics
);
75 object_property_add_child(OBJECT(spapr
), "ics", obj
, &error_abort
);
76 object_property_add_const_link(obj
, ICS_PROP_XICS
, OBJECT(spapr
),
78 object_property_set_int(obj
, nr_irqs
, "nr-irqs", &local_err
);
82 object_property_set_bool(obj
, true, "realized", &local_err
);
90 error_propagate(errp
, local_err
);
94 static void spapr_irq_init_xics(sPAPRMachineState
*spapr
, Error
**errp
)
96 MachineState
*machine
= MACHINE(spapr
);
97 int nr_irqs
= spapr
->irq
->nr_irqs
;
98 Error
*local_err
= NULL
;
101 if (machine_kernel_irqchip_allowed(machine
) &&
102 !xics_kvm_init(spapr
, &local_err
)) {
103 spapr
->icp_type
= TYPE_KVM_ICP
;
104 spapr
->ics
= spapr_ics_create(spapr
, TYPE_ICS_KVM
, nr_irqs
,
107 if (machine_kernel_irqchip_required(machine
) && !spapr
->ics
) {
108 error_prepend(&local_err
,
109 "kernel_irqchip requested but unavailable: ");
112 error_free(local_err
);
117 xics_spapr_init(spapr
);
118 spapr
->icp_type
= TYPE_ICP
;
119 spapr
->ics
= spapr_ics_create(spapr
, TYPE_ICS_SIMPLE
, nr_irqs
,
124 error_propagate(errp
, local_err
);
127 #define ICS_IRQ_FREE(ics, srcno) \
128 (!((ics)->irqs[(srcno)].flags & (XICS_FLAGS_IRQ_MASK)))
130 static int spapr_irq_claim_xics(sPAPRMachineState
*spapr
, int irq
, bool lsi
,
133 ICSState
*ics
= spapr
->ics
;
137 if (!ics_valid_irq(ics
, irq
)) {
138 error_setg(errp
, "IRQ %d is invalid", irq
);
142 if (!ICS_IRQ_FREE(ics
, irq
- ics
->offset
)) {
143 error_setg(errp
, "IRQ %d is not free", irq
);
147 ics_set_irq_type(ics
, irq
- ics
->offset
, lsi
);
151 static void spapr_irq_free_xics(sPAPRMachineState
*spapr
, int irq
, int num
)
153 ICSState
*ics
= spapr
->ics
;
154 uint32_t srcno
= irq
- ics
->offset
;
157 if (ics_valid_irq(ics
, irq
)) {
158 trace_spapr_irq_free(0, irq
, num
);
159 for (i
= srcno
; i
< srcno
+ num
; ++i
) {
160 if (ICS_IRQ_FREE(ics
, i
)) {
161 trace_spapr_irq_free_warn(0, i
);
163 memset(&ics
->irqs
[i
], 0, sizeof(ICSIRQState
));
168 static qemu_irq
spapr_qirq_xics(sPAPRMachineState
*spapr
, int irq
)
170 ICSState
*ics
= spapr
->ics
;
171 uint32_t srcno
= irq
- ics
->offset
;
173 if (ics_valid_irq(ics
, irq
)) {
174 return ics
->qirqs
[srcno
];
180 static void spapr_irq_print_info_xics(sPAPRMachineState
*spapr
, Monitor
*mon
)
185 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
187 icp_pic_print_info(ICP(cpu
->intc
), mon
);
190 ics_pic_print_info(spapr
->ics
, mon
);
193 static void spapr_irq_cpu_intc_create_xics(sPAPRMachineState
*spapr
,
194 PowerPCCPU
*cpu
, Error
**errp
)
196 Error
*local_err
= NULL
;
199 obj
= icp_create(OBJECT(cpu
), spapr
->icp_type
, XICS_FABRIC(spapr
),
202 error_propagate(errp
, local_err
);
209 static int spapr_irq_post_load_xics(sPAPRMachineState
*spapr
, int version_id
)
211 if (!object_dynamic_cast(OBJECT(spapr
->ics
), TYPE_ICS_KVM
)) {
214 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
215 icp_resend(ICP(cpu
->intc
));
221 #define SPAPR_IRQ_XICS_NR_IRQS 0x1000
222 #define SPAPR_IRQ_XICS_NR_MSIS \
223 (XICS_IRQ_BASE + SPAPR_IRQ_XICS_NR_IRQS - SPAPR_IRQ_MSI)
225 sPAPRIrq spapr_irq_xics
= {
226 .nr_irqs
= SPAPR_IRQ_XICS_NR_IRQS
,
227 .nr_msis
= SPAPR_IRQ_XICS_NR_MSIS
,
228 .ov5
= SPAPR_OV5_XIVE_LEGACY
,
230 .init
= spapr_irq_init_xics
,
231 .claim
= spapr_irq_claim_xics
,
232 .free
= spapr_irq_free_xics
,
233 .qirq
= spapr_qirq_xics
,
234 .print_info
= spapr_irq_print_info_xics
,
235 .dt_populate
= spapr_dt_xics
,
236 .cpu_intc_create
= spapr_irq_cpu_intc_create_xics
,
237 .post_load
= spapr_irq_post_load_xics
,
243 static void spapr_irq_init_xive(sPAPRMachineState
*spapr
, Error
**errp
)
245 MachineState
*machine
= MACHINE(spapr
);
246 uint32_t nr_servers
= spapr_max_server_number(spapr
);
250 /* KVM XIVE device not yet available */
252 if (machine_kernel_irqchip_required(machine
)) {
253 error_setg(errp
, "kernel_irqchip requested. no KVM XIVE support");
258 dev
= qdev_create(NULL
, TYPE_SPAPR_XIVE
);
259 qdev_prop_set_uint32(dev
, "nr-irqs", spapr
->irq
->nr_irqs
);
261 * 8 XIVE END structures per CPU. One for each available priority
263 qdev_prop_set_uint32(dev
, "nr-ends", nr_servers
<< 3);
264 qdev_init_nofail(dev
);
266 spapr
->xive
= SPAPR_XIVE(dev
);
268 /* Enable the CPU IPIs */
269 for (i
= 0; i
< nr_servers
; ++i
) {
270 spapr_xive_irq_claim(spapr
->xive
, SPAPR_IRQ_IPI
+ i
, false);
273 spapr_xive_hcall_init(spapr
);
276 static int spapr_irq_claim_xive(sPAPRMachineState
*spapr
, int irq
, bool lsi
,
279 if (!spapr_xive_irq_claim(spapr
->xive
, irq
, lsi
)) {
280 error_setg(errp
, "IRQ %d is invalid", irq
);
286 static void spapr_irq_free_xive(sPAPRMachineState
*spapr
, int irq
, int num
)
290 for (i
= irq
; i
< irq
+ num
; ++i
) {
291 spapr_xive_irq_free(spapr
->xive
, i
);
295 static qemu_irq
spapr_qirq_xive(sPAPRMachineState
*spapr
, int irq
)
297 sPAPRXive
*xive
= spapr
->xive
;
298 XiveSource
*xsrc
= &xive
->source
;
300 if (irq
>= xive
->nr_irqs
) {
304 /* The sPAPR machine/device should have claimed the IRQ before */
305 assert(xive_eas_is_valid(&xive
->eat
[irq
]));
307 return xsrc
->qirqs
[irq
];
310 static void spapr_irq_print_info_xive(sPAPRMachineState
*spapr
,
316 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
318 xive_tctx_pic_print_info(cpu
->tctx
, mon
);
321 spapr_xive_pic_print_info(spapr
->xive
, mon
);
324 static void spapr_irq_cpu_intc_create_xive(sPAPRMachineState
*spapr
,
325 PowerPCCPU
*cpu
, Error
**errp
)
327 Error
*local_err
= NULL
;
330 obj
= xive_tctx_create(OBJECT(cpu
), XIVE_ROUTER(spapr
->xive
), &local_err
);
332 error_propagate(errp
, local_err
);
336 cpu
->tctx
= XIVE_TCTX(obj
);
339 * (TCG) Early setting the OS CAM line for hotplugged CPUs as they
340 * don't beneficiate from the reset of the XIVE IRQ backend
342 spapr_xive_set_tctx_os_cam(cpu
->tctx
);
345 static int spapr_irq_post_load_xive(sPAPRMachineState
*spapr
, int version_id
)
350 static void spapr_irq_reset_xive(sPAPRMachineState
*spapr
, Error
**errp
)
355 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
357 /* (TCG) Set the OS CAM line of the thread interrupt context. */
358 spapr_xive_set_tctx_os_cam(cpu
->tctx
);
363 * XIVE uses the full IRQ number space. Set it to 8K to be compatible
367 #define SPAPR_IRQ_XIVE_NR_IRQS 0x2000
368 #define SPAPR_IRQ_XIVE_NR_MSIS (SPAPR_IRQ_XIVE_NR_IRQS - SPAPR_IRQ_MSI)
370 sPAPRIrq spapr_irq_xive
= {
371 .nr_irqs
= SPAPR_IRQ_XIVE_NR_IRQS
,
372 .nr_msis
= SPAPR_IRQ_XIVE_NR_MSIS
,
373 .ov5
= SPAPR_OV5_XIVE_EXPLOIT
,
375 .init
= spapr_irq_init_xive
,
376 .claim
= spapr_irq_claim_xive
,
377 .free
= spapr_irq_free_xive
,
378 .qirq
= spapr_qirq_xive
,
379 .print_info
= spapr_irq_print_info_xive
,
380 .dt_populate
= spapr_dt_xive
,
381 .cpu_intc_create
= spapr_irq_cpu_intc_create_xive
,
382 .post_load
= spapr_irq_post_load_xive
,
383 .reset
= spapr_irq_reset_xive
,
387 * sPAPR IRQ frontend routines for devices
389 void spapr_irq_init(sPAPRMachineState
*spapr
, Error
**errp
)
391 /* Initialize the MSI IRQ allocator. */
392 if (!SPAPR_MACHINE_GET_CLASS(spapr
)->legacy_irq_allocation
) {
393 spapr_irq_msi_init(spapr
, spapr
->irq
->nr_msis
);
396 spapr
->irq
->init(spapr
, errp
);
399 int spapr_irq_claim(sPAPRMachineState
*spapr
, int irq
, bool lsi
, Error
**errp
)
401 return spapr
->irq
->claim(spapr
, irq
, lsi
, errp
);
404 void spapr_irq_free(sPAPRMachineState
*spapr
, int irq
, int num
)
406 spapr
->irq
->free(spapr
, irq
, num
);
409 qemu_irq
spapr_qirq(sPAPRMachineState
*spapr
, int irq
)
411 return spapr
->irq
->qirq(spapr
, irq
);
414 int spapr_irq_post_load(sPAPRMachineState
*spapr
, int version_id
)
416 return spapr
->irq
->post_load(spapr
, version_id
);
419 void spapr_irq_reset(sPAPRMachineState
*spapr
, Error
**errp
)
421 if (spapr
->irq
->reset
) {
422 spapr
->irq
->reset(spapr
, errp
);
427 * XICS legacy routines - to deprecate one day
430 static int ics_find_free_block(ICSState
*ics
, int num
, int alignnum
)
434 for (first
= 0; first
< ics
->nr_irqs
; first
+= alignnum
) {
435 if (num
> (ics
->nr_irqs
- first
)) {
438 for (i
= first
; i
< first
+ num
; ++i
) {
439 if (!ICS_IRQ_FREE(ics
, i
)) {
443 if (i
== (first
+ num
)) {
451 int spapr_irq_find(sPAPRMachineState
*spapr
, int num
, bool align
, Error
**errp
)
453 ICSState
*ics
= spapr
->ics
;
459 * MSIMesage::data is used for storing VIRQ so
460 * it has to be aligned to num to support multiple
461 * MSI vectors. MSI-X is not affected by this.
462 * The hint is used for the first IRQ, the rest should
463 * be allocated continuously.
466 assert((num
== 1) || (num
== 2) || (num
== 4) ||
467 (num
== 8) || (num
== 16) || (num
== 32));
468 first
= ics_find_free_block(ics
, num
, num
);
470 first
= ics_find_free_block(ics
, num
, 1);
474 error_setg(errp
, "can't find a free %d-IRQ block", num
);
478 return first
+ ics
->offset
;
481 #define SPAPR_IRQ_XICS_LEGACY_NR_IRQS 0x400
483 sPAPRIrq spapr_irq_xics_legacy
= {
484 .nr_irqs
= SPAPR_IRQ_XICS_LEGACY_NR_IRQS
,
485 .nr_msis
= SPAPR_IRQ_XICS_LEGACY_NR_IRQS
,
486 .ov5
= SPAPR_OV5_XIVE_LEGACY
,
488 .init
= spapr_irq_init_xics
,
489 .claim
= spapr_irq_claim_xics
,
490 .free
= spapr_irq_free_xics
,
491 .qirq
= spapr_qirq_xics
,
492 .print_info
= spapr_irq_print_info_xics
,
493 .dt_populate
= spapr_dt_xics
,
494 .cpu_intc_create
= spapr_irq_cpu_intc_create_xics
,
495 .post_load
= spapr_irq_post_load_xics
,