2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Authors: Jack Lange <jarusl@cs.northwestern.edu>
15 * Peter Dinda <pdinda@northwestern.edu> (SMP)
17 * This is free software. You are permitted to use,
18 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
22 #include <devices/apic.h>
23 #include <devices/apic_regs.h>
24 #include <palacios/vmm.h>
25 #include <palacios/vmm_msr.h>
26 #include <palacios/vmm_sprintf.h>
27 #include <palacios/vm_guest.h>
28 #include <palacios/vmm_types.h>
33 #ifndef CONFIG_DEBUG_APIC
35 #define PrintDebug(fmt, args...)
38 static char * shorthand_str[] = {
45 static char * deliverymode_str[] = {
58 typedef enum { APIC_TMR_INT, APIC_THERM_INT, APIC_PERF_INT,
59 APIC_LINT0_INT, APIC_LINT1_INT, APIC_ERR_INT } apic_irq_type_t;
61 #define APIC_FIXED_DELIVERY 0x0
62 #define APIC_LOWEST_DELIVERY 0x1
63 #define APIC_SMI_DELIVERY 0x2
64 #define APIC_RES1_DELIVERY 0x3
65 #define APIC_NMI_DELIVERY 0x4
66 #define APIC_INIT_DELIVERY 0x5
67 #define APIC_SIPI_DELIVERY 0x6
68 #define APIC_EXTINT_DELIVERY 0x7
70 #define APIC_SHORTHAND_NONE 0x0
71 #define APIC_SHORTHAND_SELF 0x1
72 #define APIC_SHORTHAND_ALL 0x2
73 #define APIC_SHORTHAND_ALL_BUT_ME 0x3
75 #define APIC_DEST_PHYSICAL 0x0
76 #define APIC_DEST_LOGICAL 0x1
79 #define BASE_ADDR_MSR 0x0000001B
80 #define DEFAULT_BASE_ADDR 0xfee00000
82 #define APIC_ID_OFFSET 0x020
83 #define APIC_VERSION_OFFSET 0x030
84 #define TPR_OFFSET 0x080
85 #define APR_OFFSET 0x090
86 #define PPR_OFFSET 0x0a0
87 #define EOI_OFFSET 0x0b0
88 #define REMOTE_READ_OFFSET 0x0c0
89 #define LDR_OFFSET 0x0d0
90 #define DFR_OFFSET 0x0e0
91 #define SPURIOUS_INT_VEC_OFFSET 0x0f0
93 #define ISR_OFFSET0 0x100 // 0x100 - 0x170
94 #define ISR_OFFSET1 0x110 // 0x100 - 0x170
95 #define ISR_OFFSET2 0x120 // 0x100 - 0x170
96 #define ISR_OFFSET3 0x130 // 0x100 - 0x170
97 #define ISR_OFFSET4 0x140 // 0x100 - 0x170
98 #define ISR_OFFSET5 0x150 // 0x100 - 0x170
99 #define ISR_OFFSET6 0x160 // 0x100 - 0x170
100 #define ISR_OFFSET7 0x170 // 0x100 - 0x170
102 #define TRIG_OFFSET0 0x180 // 0x180 - 0x1f0
103 #define TRIG_OFFSET1 0x190 // 0x180 - 0x1f0
104 #define TRIG_OFFSET2 0x1a0 // 0x180 - 0x1f0
105 #define TRIG_OFFSET3 0x1b0 // 0x180 - 0x1f0
106 #define TRIG_OFFSET4 0x1c0 // 0x180 - 0x1f0
107 #define TRIG_OFFSET5 0x1d0 // 0x180 - 0x1f0
108 #define TRIG_OFFSET6 0x1e0 // 0x180 - 0x1f0
109 #define TRIG_OFFSET7 0x1f0 // 0x180 - 0x1f0
112 #define IRR_OFFSET0 0x200 // 0x200 - 0x270
113 #define IRR_OFFSET1 0x210 // 0x200 - 0x270
114 #define IRR_OFFSET2 0x220 // 0x200 - 0x270
115 #define IRR_OFFSET3 0x230 // 0x200 - 0x270
116 #define IRR_OFFSET4 0x240 // 0x200 - 0x270
117 #define IRR_OFFSET5 0x250 // 0x200 - 0x270
118 #define IRR_OFFSET6 0x260 // 0x200 - 0x270
119 #define IRR_OFFSET7 0x270 // 0x200 - 0x270
122 #define ESR_OFFSET 0x280
123 #define INT_CMD_LO_OFFSET 0x300
124 #define INT_CMD_HI_OFFSET 0x310
125 #define TMR_LOC_VEC_TBL_OFFSET 0x320
126 #define THERM_LOC_VEC_TBL_OFFSET 0x330
127 #define PERF_CTR_LOC_VEC_TBL_OFFSET 0x340
128 #define LINT0_VEC_TBL_OFFSET 0x350
129 #define LINT1_VEC_TBL_OFFSET 0x360
130 #define ERR_VEC_TBL_OFFSET 0x370
131 #define TMR_INIT_CNT_OFFSET 0x380
132 #define TMR_CUR_CNT_OFFSET 0x390
133 #define TMR_DIV_CFG_OFFSET 0x3e0
134 #define EXT_APIC_FEATURE_OFFSET 0x400
135 #define EXT_APIC_CMD_OFFSET 0x410
136 #define SEOI_OFFSET 0x420
138 #define IER_OFFSET0 0x480 // 0x480 - 0x4f0
139 #define IER_OFFSET1 0x490 // 0x480 - 0x4f0
140 #define IER_OFFSET2 0x4a0 // 0x480 - 0x4f0
141 #define IER_OFFSET3 0x4b0 // 0x480 - 0x4f0
142 #define IER_OFFSET4 0x4c0 // 0x480 - 0x4f0
143 #define IER_OFFSET5 0x4d0 // 0x480 - 0x4f0
144 #define IER_OFFSET6 0x4e0 // 0x480 - 0x4f0
145 #define IER_OFFSET7 0x4f0 // 0x480 - 0x4f0
147 #define EXT_INT_LOC_VEC_TBL_OFFSET0 0x500 // 0x500 - 0x530
148 #define EXT_INT_LOC_VEC_TBL_OFFSET1 0x510 // 0x500 - 0x530
149 #define EXT_INT_LOC_VEC_TBL_OFFSET2 0x520 // 0x500 - 0x530
150 #define EXT_INT_LOC_VEC_TBL_OFFSET3 0x530 // 0x500 - 0x530
157 uint8_t bootstrap_cpu : 1;
159 uint8_t apic_enable : 1;
160 uint64_t base_addr : 40;
162 } __attribute__((packed));
163 } __attribute__((packed));
164 } __attribute__((packed));
168 typedef enum {INIT_ST,
170 STARTED} ipi_state_t;
172 struct apic_dev_state;
178 struct apic_msr base_addr_msr;
181 /* memory map registers */
183 struct lapic_id_reg lapic_id;
184 struct apic_ver_reg apic_ver;
185 struct ext_apic_ctrl_reg ext_apic_ctrl;
186 struct local_vec_tbl_reg local_vec_tbl;
187 struct tmr_vec_tbl_reg tmr_vec_tbl;
188 struct tmr_div_cfg_reg tmr_div_cfg;
189 struct lint_vec_tbl_reg lint0_vec_tbl;
190 struct lint_vec_tbl_reg lint1_vec_tbl;
191 struct perf_ctr_loc_vec_tbl_reg perf_ctr_loc_vec_tbl;
192 struct therm_loc_vec_tbl_reg therm_loc_vec_tbl;
193 struct err_vec_tbl_reg err_vec_tbl;
194 struct err_status_reg err_status;
195 struct spurious_int_reg spurious_int;
196 struct int_cmd_reg int_cmd;
197 struct log_dst_reg log_dst;
198 struct dst_fmt_reg dst_fmt;
199 struct arb_prio_reg arb_prio;
200 struct task_prio_reg task_prio;
201 struct proc_prio_reg proc_prio;
202 struct ext_apic_feature_reg ext_apic_feature;
203 struct spec_eoi_reg spec_eoi;
206 uint32_t tmr_cur_cnt;
207 uint32_t tmr_init_cnt;
210 struct local_vec_tbl_reg ext_intr_vec_tbl[4];
212 uint32_t rem_rd_data;
215 ipi_state_t ipi_state;
217 uint8_t int_req_reg[32];
218 uint8_t int_svc_reg[32];
219 uint8_t int_en_reg[32];
220 uint8_t trig_mode_reg[32];
222 struct guest_info * core;
224 void * controller_handle;
226 struct v3_timer * timer;
236 struct apic_dev_state {
239 struct apic_state apics[0];
240 } __attribute__((packed));
246 static int apic_read(struct guest_info * core, addr_t guest_addr, void * dst, uint_t length, void * priv_data);
247 static int apic_write(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data);
250 static void init_apic_state(struct apic_state * apic, uint32_t id) {
251 apic->base_addr = DEFAULT_BASE_ADDR;
254 // boot processor, enabled
255 apic->base_addr_msr.value = 0x0000000000000900LL;
257 // ap processor, enabled
258 apic->base_addr_msr.value = 0x0000000000000800LL;
261 // same base address regardless of ap or main
262 apic->base_addr_msr.value |= ((uint64_t)DEFAULT_BASE_ADDR);
264 PrintDebug("apic %u: (init_apic_state): msr=0x%llx\n",id, apic->base_addr_msr.value);
266 PrintDebug("apic %u: (init_apic_state): Sizeof Interrupt Request Register %d, should be 32\n",
267 id, (uint_t)sizeof(apic->int_req_reg));
269 memset(apic->int_req_reg, 0, sizeof(apic->int_req_reg));
270 memset(apic->int_svc_reg, 0, sizeof(apic->int_svc_reg));
271 memset(apic->int_en_reg, 0xff, sizeof(apic->int_en_reg));
272 memset(apic->trig_mode_reg, 0, sizeof(apic->trig_mode_reg));
274 apic->eoi = 0x00000000;
275 apic->rem_rd_data = 0x00000000;
276 apic->tmr_init_cnt = 0x00000000;
277 apic->tmr_cur_cnt = 0x00000000;
279 apic->lapic_id.val = id;
281 apic->ipi_state = INIT_ST;
283 // The P6 has 6 LVT entries, so we set the value to (6-1)...
284 apic->apic_ver.val = 0x80050010;
286 apic->task_prio.val = 0x00000000;
287 apic->arb_prio.val = 0x00000000;
288 apic->proc_prio.val = 0x00000000;
289 apic->log_dst.val = 0x00000000;
290 apic->dst_fmt.val = 0xffffffff;
291 apic->spurious_int.val = 0x000000ff;
292 apic->err_status.val = 0x00000000;
293 apic->int_cmd.val = 0x0000000000000000LL;
294 apic->tmr_vec_tbl.val = 0x00010000;
295 apic->therm_loc_vec_tbl.val = 0x00010000;
296 apic->perf_ctr_loc_vec_tbl.val = 0x00010000;
297 apic->lint0_vec_tbl.val = 0x00010000;
298 apic->lint1_vec_tbl.val = 0x00010000;
299 apic->err_vec_tbl.val = 0x00010000;
300 apic->tmr_div_cfg.val = 0x00000000;
301 //apic->ext_apic_feature.val = 0x00000007;
302 apic->ext_apic_feature.val = 0x00040007;
303 apic->ext_apic_ctrl.val = 0x00000000;
304 apic->spec_eoi.val = 0x00000000;
313 static int read_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t * dst, void * priv_data) {
314 struct apic_dev_state * apic_dev = (struct apic_dev_state *)priv_data;
315 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
317 PrintDebug("apic %u: core %u: MSR read\n", apic->lapic_id.val, core->cpu_id);
319 dst->value = apic->base_addr;
325 static int write_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t src, void * priv_data) {
326 struct apic_dev_state * apic_dev = (struct apic_dev_state *)priv_data;
327 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
328 struct v3_mem_region * old_reg = v3_get_mem_region(core->vm_info, core->cpu_id, apic->base_addr);
331 PrintDebug("apic %u: core %u: MSR write\n", apic->lapic_id.val, core->cpu_id);
333 if (old_reg == NULL) {
335 PrintError("apic %u: core %u: APIC Base address region does not exit...\n",
336 apic->lapic_id.val, core->cpu_id);
342 v3_delete_mem_region(core->vm_info, old_reg);
344 apic->base_addr = src.value;
346 if (v3_hook_full_mem(core->vm_info, core->cpu_id, apic->base_addr,
347 apic->base_addr + PAGE_SIZE_4KB,
348 apic_read, apic_write, apic_dev) == -1) {
349 PrintError("apic %u: core %u: Could not hook new APIC Base address\n",
350 apic->lapic_id.val, core->cpu_id);
360 // irq_num is the bit offset into a 256 bit buffer...
363 // 0 = OK, no interrupt needed now
364 // 1 = OK, interrupt needed now
365 static int activate_apic_irq(struct apic_state * apic, uint32_t irq_num) {
366 int major_offset = (irq_num & ~0x00000007) >> 3;
367 int minor_offset = irq_num & 0x00000007;
368 uint8_t * req_location = apic->int_req_reg + major_offset;
369 uint8_t * en_location = apic->int_en_reg + major_offset;
370 uint8_t flag = 0x1 << minor_offset;
373 if (irq_num <= 15 || irq_num>255) {
374 PrintError("apic %u: core %d: Attempting to raise an invalid interrupt: %d\n",
375 apic->lapic_id.val, apic->core->cpu_id, irq_num);
380 PrintDebug("apic %u: core %d: Raising APIC IRQ %d\n", apic->lapic_id.val, apic->core->cpu_id, irq_num);
382 if (*req_location & flag) {
383 PrintDebug("Interrupt %d coallescing\n", irq_num);
387 if (*en_location & flag) {
388 *req_location |= flag;
391 PrintDebug("apic %u: core %d: Interrupt not enabled... %.2x\n",
392 apic->lapic_id.val, apic->core->cpu_id,*en_location);
400 static int get_highest_isr(struct apic_state * apic) {
403 // We iterate backwards to find the highest priority
404 for (i = 31; i >= 0; i--) {
405 uint8_t * svc_major = apic->int_svc_reg + i;
407 if ((*svc_major) & 0xff) {
408 for (j = 7; j >= 0; j--) {
409 uint8_t flag = 0x1 << j;
410 if ((*svc_major) & flag) {
411 return ((i * 8) + j);
422 static int get_highest_irr(struct apic_state * apic) {
425 // We iterate backwards to find the highest priority
426 for (i = 31; i >= 0; i--) {
427 uint8_t * req_major = apic->int_req_reg + i;
429 if ((*req_major) & 0xff) {
430 for (j = 7; j >= 0; j--) {
431 uint8_t flag = 0x1 << j;
432 if ((*req_major) & flag) {
433 return ((i * 8) + j);
445 static int apic_do_eoi(struct apic_state * apic) {
446 int isr_irq = get_highest_isr(apic);
449 int major_offset = (isr_irq & ~0x00000007) >> 3;
450 int minor_offset = isr_irq & 0x00000007;
451 uint8_t flag = 0x1 << minor_offset;
452 uint8_t * svc_location = apic->int_svc_reg + major_offset;
454 PrintDebug("apic %u: core ?: Received APIC EOI for IRQ %d\n", apic->lapic_id.val,isr_irq);
456 *svc_location &= ~flag;
458 #ifdef CONFIG_CRAY_XT
460 if ((isr_irq == 238) ||
462 PrintDebug("apic %u: core ?: Acking IRQ %d\n", apic->lapic_id.val,isr_irq);
465 if (isr_irq == 238) {
470 //PrintError("apic %u: core ?: Spurious EOI...\n",apic->lapic_id.val);
477 static int activate_internal_irq(struct apic_state * apic, apic_irq_type_t int_type) {
478 uint32_t vec_num = 0;
479 uint32_t del_mode = 0;
485 vec_num = apic->tmr_vec_tbl.vec;
486 del_mode = APIC_FIXED_DELIVERY;
487 masked = apic->tmr_vec_tbl.mask;
490 vec_num = apic->therm_loc_vec_tbl.vec;
491 del_mode = apic->therm_loc_vec_tbl.msg_type;
492 masked = apic->therm_loc_vec_tbl.mask;
495 vec_num = apic->perf_ctr_loc_vec_tbl.vec;
496 del_mode = apic->perf_ctr_loc_vec_tbl.msg_type;
497 masked = apic->perf_ctr_loc_vec_tbl.mask;
500 vec_num = apic->lint0_vec_tbl.vec;
501 del_mode = apic->lint0_vec_tbl.msg_type;
502 masked = apic->lint0_vec_tbl.mask;
505 vec_num = apic->lint1_vec_tbl.vec;
506 del_mode = apic->lint1_vec_tbl.msg_type;
507 masked = apic->lint1_vec_tbl.mask;
510 vec_num = apic->err_vec_tbl.vec;
511 del_mode = APIC_FIXED_DELIVERY;
512 masked = apic->err_vec_tbl.mask;
515 PrintError("apic %u: core ?: Invalid APIC interrupt type\n", apic->lapic_id.val);
519 // interrupt is masked, don't send
521 PrintDebug("apic %u: core ?: Inerrupt is masked\n", apic->lapic_id.val);
525 if (del_mode == APIC_FIXED_DELIVERY) {
526 //PrintDebug("Activating internal APIC IRQ %d\n", vec_num);
527 return activate_apic_irq(apic, vec_num);
529 PrintError("apic %u: core ?: Unhandled Delivery Mode\n", apic->lapic_id.val);
536 static inline int should_deliver_cluster_ipi(struct guest_info * dst_core,
537 struct apic_state * dst_apic, uint8_t mda) {
539 if ( ((mda & 0xf0) == (dst_apic->log_dst.dst_log_id & 0xf0)) && /* (I am in the cluster and */
540 ((mda & 0x0f) & (dst_apic->log_dst.dst_log_id & 0x0f)) ) { /* I am in the set) */
542 PrintDebug("apic %u core %u: accepting clustered IRQ (mda 0x%x == log_dst 0x%x)\n",
543 dst_apic->lapic_id.val, dst_core->cpu_id, mda,
544 dst_apic->log_dst.dst_log_id);
548 PrintDebug("apic %u core %u: rejecting clustered IRQ (mda 0x%x != log_dst 0x%x)\n",
549 dst_apic->lapic_id.val, dst_core->cpu_id, mda,
550 dst_apic->log_dst.dst_log_id);
555 static inline int should_deliver_flat_ipi(struct guest_info * dst_core,
556 struct apic_state * dst_apic, uint8_t mda) {
558 if (dst_apic->log_dst.dst_log_id & mda) { // I am in the set
560 PrintDebug("apic %u core %u: accepting flat IRQ (mda 0x%x == log_dst 0x%x)\n",
561 dst_apic->lapic_id.val, dst_core->cpu_id, mda,
562 dst_apic->log_dst.dst_log_id);
568 PrintDebug("apic %u core %u: rejecting flat IRQ (mda 0x%x != log_dst 0x%x)\n",
569 dst_apic->lapic_id.val, dst_core->cpu_id, mda,
570 dst_apic->log_dst.dst_log_id);
577 static int should_deliver_ipi(struct guest_info * dst_core,
578 struct apic_state * dst_apic, uint8_t mda) {
581 if (dst_apic->dst_fmt.model == 0xf) {
584 /* always deliver broadcast */
588 return should_deliver_flat_ipi(dst_core, dst_apic, mda);
590 } else if (dst_apic->dst_fmt.model == 0x0) {
593 /* always deliver broadcast */
597 return should_deliver_cluster_ipi(dst_core, dst_apic, mda);
600 PrintError("apic %u core %u: invalid destination format register value 0x%x for logical mode delivery.\n",
601 dst_apic->lapic_id.val, dst_core->cpu_id, dst_apic->dst_fmt.model);
607 // Only the src_apic pointer is used
608 static int deliver_ipi(struct apic_state * src_apic,
609 struct apic_state * dst_apic,
610 uint32_t vector, uint8_t del_mode) {
613 struct guest_info * dst_core = dst_apic->core;
618 case APIC_FIXED_DELIVERY:
619 case APIC_LOWEST_DELIVERY: {
621 // caller needs to have decided which apic to deliver to!
625 PrintDebug("delivering IRQ %d to core %u\n", vector, dst_core->cpu_id);
627 do_xcall = activate_apic_irq(dst_apic, vector);
630 PrintError("Failed to activate apic irq!\n");
634 if (do_xcall && (dst_apic != src_apic)) {
635 // Assume core # is same as logical processor for now
636 // TODO FIX THIS FIX THIS
637 // THERE SHOULD BE: guestapicid->virtualapicid map,
638 // cpu_id->logical processor map
639 // host maitains logical proc->phsysical proc
640 PrintDebug(" non-local core with new interrupt, forcing it to exit now\n");
642 #ifdef CONFIG_MULTITHREAD_OS
643 v3_interrupt_cpu(dst_core->vm_info, dst_core->cpu_id, 0);
651 case APIC_INIT_DELIVERY: {
653 PrintDebug(" INIT delivery to core %u\n", dst_core->cpu_id);
655 // TODO: any APIC reset on dest core (shouldn't be needed, but not sure...)
658 if (dst_apic->ipi_state != INIT_ST) {
659 PrintError(" Warning: core %u is not in INIT state (mode = %d), ignored (assuming this is the deassert)\n",
660 dst_core->cpu_id, dst_apic->ipi_state);
661 // Only a warning, since INIT INIT SIPI is common
665 // We transition the target core to SIPI state
666 dst_apic->ipi_state = SIPI; // note: locking should not be needed here
668 // That should be it since the target core should be
669 // waiting in host on this transition
670 // either it's on another core or on a different preemptive thread
671 // in both cases, it will quickly notice this transition
672 // in particular, we should not need to force an exit here
674 PrintDebug(" INIT delivery done\n");
678 case APIC_SIPI_DELIVERY: {
681 if (dst_apic->ipi_state != SIPI) {
682 PrintError(" core %u is not in SIPI state (mode = %d), ignored!\n",
683 dst_core->cpu_id, dst_apic->ipi_state);
687 // Write the RIP, CS, and descriptor
688 // assume the rest is already good to go
690 // vector VV -> rip at 0
692 // This means we start executing at linear address VV000
694 // So the selector needs to be VV00
695 // and the base needs to be VV000
698 dst_core->segments.cs.selector = vector << 8;
699 dst_core->segments.cs.limit = 0xffff;
700 dst_core->segments.cs.base = vector << 12;
702 PrintDebug(" SIPI delivery (0x%x -> 0x%x:0x0) to core %u\n",
703 vector, dst_core->segments.cs.selector, dst_core->cpu_id);
704 // Maybe need to adjust the APIC?
706 // We transition the target core to SIPI state
707 dst_core->core_run_state = CORE_RUNNING; // note: locking should not be needed here
708 dst_apic->ipi_state = STARTED;
710 // As with INIT, we should not need to do anything else
712 PrintDebug(" SIPI delivery done\n");
716 case APIC_SMI_DELIVERY:
717 case APIC_RES1_DELIVERY: // reserved
718 case APIC_NMI_DELIVERY:
719 case APIC_EXTINT_DELIVERY: // ExtInt
721 PrintError("IPI %d delivery is unsupported\n", del_mode);
729 static struct apic_state * find_physical_apic(struct apic_dev_state *apic_dev, struct int_cmd_reg *icr)
733 if (icr->dst >0 && icr->dst < apic_dev->num_apics) {
734 // see if it simply is the core id
735 if (apic_dev->apics[icr->dst].lapic_id.val == icr->dst) {
736 return &(apic_dev->apics[icr->dst]);
740 for (i=0;i<apic_dev->num_apics;i++) {
741 if (apic_dev->apics[i].lapic_id.val == icr->dst) {
742 return &(apic_dev->apics[i]);
751 static int route_ipi(struct apic_dev_state * apic_dev,
752 struct apic_state * src_apic,
753 struct int_cmd_reg * icr) {
754 struct apic_state * dest_apic = NULL;
757 PrintDebug("apic: IPI %s %u from apic %p to %s %s %u (icr=0x%llx)\n",
758 deliverymode_str[icr->del_mode],
761 (icr->dst_mode == 0) ? "(physical)" : "(logical)",
762 shorthand_str[icr->dst_shorthand],
767 switch (icr->dst_shorthand) {
769 case APIC_SHORTHAND_NONE: // no shorthand
770 if (icr->dst_mode == APIC_DEST_PHYSICAL) {
772 dest_apic=find_physical_apic(apic_dev,icr);
774 if (dest_apic==NULL) {
775 PrintError("apic: Attempted send to unregistered apic id=%u\n", icr->dst);
780 dest_apic = &(apic_dev->apics[icr->dst]);
784 if (deliver_ipi(src_apic, dest_apic,
785 icr->vec, icr->del_mode) == -1) {
786 PrintError("apic: Could not deliver IPI\n");
791 V3_Print("apic: done\n");
794 } else if (icr->dst_mode == APIC_DEST_LOGICAL) {
796 if (icr->del_mode!=APIC_LOWEST_DELIVERY ) {
797 // logical, but not lowest priority
798 // we immediately trigger
799 // fixed, smi, reserved, nmi, init, sipi, etc
802 uint8_t mda = icr->dst;
804 for (i = 0; i < apic_dev->num_apics; i++) {
806 dest_apic = &(apic_dev->apics[i]);
808 int del_flag = should_deliver_ipi(dest_apic->core, dest_apic, mda);
810 if (del_flag == -1) {
811 PrintError("apic: Error checking delivery mode\n");
813 } else if (del_flag == 1) {
814 if (deliver_ipi(src_apic, dest_apic,
815 icr->vec, icr->del_mode) == -1) {
816 PrintError("apic: Error: Could not deliver IPI\n");
821 } else { //APIC_LOWEST_DELIVERY
822 // logical, lowest priority
824 struct apic_state * cur_best_apic = NULL;
825 uint8_t mda = icr->dst;
827 for (i = 0; i < apic_dev->num_apics; i++) {
830 dest_apic = &(apic_dev->apics[i]);
832 del_flag = should_deliver_ipi(dest_apic->core, dest_apic, mda);
834 if (del_flag == -1) {
835 PrintError("apic: Error checking delivery mode\n");
838 } else if (del_flag == 1) {
839 // update priority for lowest priority scan
840 if (!cur_best_apic) {
841 cur_best_apic = dest_apic;
842 } else if (dest_apic->task_prio.val < cur_best_apic->task_prio.val) {
843 cur_best_apic = dest_apic;
848 // now we will deliver to the best one if it exists
849 if (!cur_best_apic) {
850 PrintDebug("apic: lowest priority deliver, but no destinations!\n");
852 if (deliver_ipi(src_apic, cur_best_apic,
853 icr->vec, icr->del_mode) == -1) {
854 PrintError("apic: Error: Could not deliver IPI\n");
857 //V3_Print("apic: logical, lowest priority delivery to apic %u\n",cur_best_apic->lapic_id.val);
864 case APIC_SHORTHAND_SELF: // self
866 if (src_apic == NULL) { /* this is not an apic, but it's trying to send to itself??? */
867 PrintError("apic: Sending IPI to self from generic IPI sender\n");
873 if (icr->dst_mode == APIC_DEST_PHYSICAL) { /* physical delivery */
874 if (deliver_ipi(src_apic, src_apic, icr->vec, icr->del_mode) == -1) {
875 PrintError("apic: Could not deliver IPI to self (physical)\n");
878 } else if (icr->dst_mode == APIC_DEST_LOGICAL) { /* logical delivery */
879 PrintError("apic: use of logical delivery in self (untested)\n");
880 if (deliver_ipi(src_apic, src_apic, icr->vec, icr->del_mode) == -1) {
881 PrintError("apic: Could not deliver IPI to self (logical)\n");
888 case APIC_SHORTHAND_ALL:
889 case APIC_SHORTHAND_ALL_BUT_ME: { /* all and all-but-me */
890 /* assuming that logical verus physical doesn't matter
891 although it is odd that both are used */
894 for (i = 0; i < apic_dev->num_apics; i++) {
895 dest_apic = &(apic_dev->apics[i]);
897 if ((dest_apic != src_apic) || (icr->dst_shorthand == APIC_SHORTHAND_ALL)) {
898 if (deliver_ipi(src_apic, dest_apic, icr->vec, icr->del_mode) == -1) {
899 PrintError("apic: Error: Could not deliver IPI\n");
908 PrintError("apic: Error routing IPI, invalid Mode (%d)\n", icr->dst_shorthand);
916 // External function, expected to acquire lock on apic
917 static int apic_read(struct guest_info * core, addr_t guest_addr, void * dst, uint_t length, void * priv_data) {
918 struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
919 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
920 addr_t reg_addr = guest_addr - apic->base_addr;
921 struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
925 PrintDebug("apic %u: core %u: at %p: Read apic address space (%p)\n",
926 apic->lapic_id.val, core->cpu_id, apic, (void *)guest_addr);
928 if (msr->apic_enable == 0) {
929 PrintError("apic %u: core %u: Read from APIC address space with disabled APIC, apic msr=0x%llx\n",
930 apic->lapic_id.val, core->cpu_id, apic->base_addr_msr.value);
935 /* Because "May not be supported" doesn't matter to Linux developers... */
936 /* if (length != 4) { */
937 /* PrintError("Invalid apic read length (%d)\n", length); */
941 switch (reg_addr & ~0x3) {
943 // Well, only an idiot would read from a architectural write only register
945 // PrintError("Attempting to read from write only register\n");
951 val = apic->lapic_id.val;
953 case APIC_VERSION_OFFSET:
954 val = apic->apic_ver.val;
957 val = apic->task_prio.val;
960 val = apic->arb_prio.val;
963 val = apic->proc_prio.val;
965 case REMOTE_READ_OFFSET:
966 val = apic->rem_rd_data;
969 val = apic->log_dst.val;
972 val = apic->dst_fmt.val;
974 case SPURIOUS_INT_VEC_OFFSET:
975 val = apic->spurious_int.val;
978 val = apic->err_status.val;
980 case TMR_LOC_VEC_TBL_OFFSET:
981 val = apic->tmr_vec_tbl.val;
983 case LINT0_VEC_TBL_OFFSET:
984 val = apic->lint0_vec_tbl.val;
986 case LINT1_VEC_TBL_OFFSET:
987 val = apic->lint1_vec_tbl.val;
989 case ERR_VEC_TBL_OFFSET:
990 val = apic->err_vec_tbl.val;
992 case TMR_INIT_CNT_OFFSET:
993 val = apic->tmr_init_cnt;
995 case TMR_DIV_CFG_OFFSET:
996 val = apic->tmr_div_cfg.val;
1000 val = *(uint32_t *)(apic->int_en_reg);
1003 val = *(uint32_t *)(apic->int_en_reg + 4);
1006 val = *(uint32_t *)(apic->int_en_reg + 8);
1009 val = *(uint32_t *)(apic->int_en_reg + 12);
1012 val = *(uint32_t *)(apic->int_en_reg + 16);
1015 val = *(uint32_t *)(apic->int_en_reg + 20);
1018 val = *(uint32_t *)(apic->int_en_reg + 24);
1021 val = *(uint32_t *)(apic->int_en_reg + 28);
1025 val = *(uint32_t *)(apic->int_svc_reg);
1028 val = *(uint32_t *)(apic->int_svc_reg + 4);
1031 val = *(uint32_t *)(apic->int_svc_reg + 8);
1034 val = *(uint32_t *)(apic->int_svc_reg + 12);
1037 val = *(uint32_t *)(apic->int_svc_reg + 16);
1040 val = *(uint32_t *)(apic->int_svc_reg + 20);
1043 val = *(uint32_t *)(apic->int_svc_reg + 24);
1046 val = *(uint32_t *)(apic->int_svc_reg + 28);
1050 val = *(uint32_t *)(apic->trig_mode_reg);
1053 val = *(uint32_t *)(apic->trig_mode_reg + 4);
1056 val = *(uint32_t *)(apic->trig_mode_reg + 8);
1059 val = *(uint32_t *)(apic->trig_mode_reg + 12);
1062 val = *(uint32_t *)(apic->trig_mode_reg + 16);
1065 val = *(uint32_t *)(apic->trig_mode_reg + 20);
1068 val = *(uint32_t *)(apic->trig_mode_reg + 24);
1071 val = *(uint32_t *)(apic->trig_mode_reg + 28);
1075 val = *(uint32_t *)(apic->int_req_reg);
1078 val = *(uint32_t *)(apic->int_req_reg + 4);
1081 val = *(uint32_t *)(apic->int_req_reg + 8);
1084 val = *(uint32_t *)(apic->int_req_reg + 12);
1087 val = *(uint32_t *)(apic->int_req_reg + 16);
1090 val = *(uint32_t *)(apic->int_req_reg + 20);
1093 val = *(uint32_t *)(apic->int_req_reg + 24);
1096 val = *(uint32_t *)(apic->int_req_reg + 28);
1098 case TMR_CUR_CNT_OFFSET:
1099 val = apic->tmr_cur_cnt;
1102 // We are not going to implement these....
1103 case THERM_LOC_VEC_TBL_OFFSET:
1104 val = apic->therm_loc_vec_tbl.val;
1106 case PERF_CTR_LOC_VEC_TBL_OFFSET:
1107 val = apic->perf_ctr_loc_vec_tbl.val;
1112 // handled registers
1113 case INT_CMD_LO_OFFSET:
1114 val = apic->int_cmd.lo;
1116 case INT_CMD_HI_OFFSET:
1117 val = apic->int_cmd.hi;
1120 // handle current timer count
1122 // Unhandled Registers
1123 case EXT_INT_LOC_VEC_TBL_OFFSET0:
1124 val = apic->ext_intr_vec_tbl[0].val;
1126 case EXT_INT_LOC_VEC_TBL_OFFSET1:
1127 val = apic->ext_intr_vec_tbl[1].val;
1129 case EXT_INT_LOC_VEC_TBL_OFFSET2:
1130 val = apic->ext_intr_vec_tbl[2].val;
1132 case EXT_INT_LOC_VEC_TBL_OFFSET3:
1133 val = apic->ext_intr_vec_tbl[3].val;
1137 case EXT_APIC_FEATURE_OFFSET:
1138 case EXT_APIC_CMD_OFFSET:
1142 PrintError("apic %u: core %u: Read from Unhandled APIC Register: %x (getting zero)\n",
1143 apic->lapic_id.val, core->cpu_id, (uint32_t)reg_addr);
1149 uint_t byte_addr = reg_addr & 0x3;
1150 uint8_t * val_ptr = (uint8_t *)dst;
1152 *val_ptr = *(((uint8_t *)&val) + byte_addr);
1154 } else if ((length == 2) &&
1155 ((reg_addr & 0x3) == 0x3)) {
1156 uint_t byte_addr = reg_addr & 0x3;
1157 uint16_t * val_ptr = (uint16_t *)dst;
1158 *val_ptr = *(((uint16_t *)&val) + byte_addr);
1160 } else if (length == 4) {
1161 uint32_t * val_ptr = (uint32_t *)dst;
1165 PrintError("apic %u: core %u: Invalid apic read length (%d)\n",
1166 apic->lapic_id.val, core->cpu_id, length);
1170 PrintDebug("apic %u: core %u: Read finished (val=%x)\n",
1171 apic->lapic_id.val, core->cpu_id, *(uint32_t *)dst);
1180 static int apic_write(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data) {
1181 struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
1182 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
1183 addr_t reg_addr = guest_addr - apic->base_addr;
1184 struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
1185 uint32_t op_val = *(uint32_t *)src;
1187 PrintDebug("apic %u: core %u: at %p and priv_data is at %p\n",
1188 apic->lapic_id.val, core->cpu_id, apic, priv_data);
1190 PrintDebug("apic %u: core %u: write to address space (%p) (val=%x)\n",
1191 apic->lapic_id.val, core->cpu_id, (void *)guest_addr, *(uint32_t *)src);
1193 if (msr->apic_enable == 0) {
1194 PrintError("apic %u: core %u: Write to APIC address space with disabled APIC, apic msr=0x%llx\n",
1195 apic->lapic_id.val, core->cpu_id, apic->base_addr_msr.value);
1201 PrintError("apic %u: core %u: Invalid apic write length (%d)\n",
1202 apic->lapic_id.val, length, core->cpu_id);
1207 case REMOTE_READ_OFFSET:
1208 case APIC_VERSION_OFFSET:
1235 case EXT_APIC_FEATURE_OFFSET:
1237 PrintError("apic %u: core %u: Attempting to write to read only register %p (error)\n",
1238 apic->lapic_id.val, core->cpu_id, (void *)reg_addr);
1243 case APIC_ID_OFFSET:
1244 //V3_Print("apic %u: core %u: my id is being changed to %u\n",
1245 // apic->lapic_id.val, core->cpu_id, op_val);
1247 apic->lapic_id.val = op_val;
1250 apic->task_prio.val = op_val;
1253 PrintDebug("apic %u: core %u: setting log_dst.val to 0x%x\n",
1254 apic->lapic_id.val, core->cpu_id, op_val);
1255 apic->log_dst.val = op_val;
1258 apic->dst_fmt.val = op_val;
1260 case SPURIOUS_INT_VEC_OFFSET:
1261 apic->spurious_int.val = op_val;
1264 apic->err_status.val = op_val;
1266 case TMR_LOC_VEC_TBL_OFFSET:
1267 apic->tmr_vec_tbl.val = op_val;
1269 case THERM_LOC_VEC_TBL_OFFSET:
1270 apic->therm_loc_vec_tbl.val = op_val;
1272 case PERF_CTR_LOC_VEC_TBL_OFFSET:
1273 apic->perf_ctr_loc_vec_tbl.val = op_val;
1275 case LINT0_VEC_TBL_OFFSET:
1276 apic->lint0_vec_tbl.val = op_val;
1278 case LINT1_VEC_TBL_OFFSET:
1279 apic->lint1_vec_tbl.val = op_val;
1281 case ERR_VEC_TBL_OFFSET:
1282 apic->err_vec_tbl.val = op_val;
1284 case TMR_INIT_CNT_OFFSET:
1285 apic->tmr_init_cnt = op_val;
1286 apic->tmr_cur_cnt = op_val;
1288 case TMR_CUR_CNT_OFFSET:
1289 apic->tmr_cur_cnt = op_val;
1291 case TMR_DIV_CFG_OFFSET:
1292 apic->tmr_div_cfg.val = op_val;
1296 // Enable mask (256 bits)
1298 *(uint32_t *)(apic->int_en_reg) = op_val;
1301 *(uint32_t *)(apic->int_en_reg + 4) = op_val;
1304 *(uint32_t *)(apic->int_en_reg + 8) = op_val;
1307 *(uint32_t *)(apic->int_en_reg + 12) = op_val;
1310 *(uint32_t *)(apic->int_en_reg + 16) = op_val;
1313 *(uint32_t *)(apic->int_en_reg + 20) = op_val;
1316 *(uint32_t *)(apic->int_en_reg + 24) = op_val;
1319 *(uint32_t *)(apic->int_en_reg + 28) = op_val;
1322 case EXT_INT_LOC_VEC_TBL_OFFSET0:
1323 apic->ext_intr_vec_tbl[0].val = op_val;
1325 case EXT_INT_LOC_VEC_TBL_OFFSET1:
1326 apic->ext_intr_vec_tbl[1].val = op_val;
1328 case EXT_INT_LOC_VEC_TBL_OFFSET2:
1329 apic->ext_intr_vec_tbl[2].val = op_val;
1331 case EXT_INT_LOC_VEC_TBL_OFFSET3:
1332 apic->ext_intr_vec_tbl[3].val = op_val;
1342 case INT_CMD_LO_OFFSET: {
1345 struct int_cmd_reg tmp_icr;
1347 apic->int_cmd.lo = op_val;
1349 tmp_icr = apic->int_cmd;
1351 // V3_Print("apic %u: core %u: sending cmd 0x%llx to apic %u\n",
1352 // apic->lapic_id.val, core->cpu_id,
1353 // apic->int_cmd.val, apic->int_cmd.dst);
1355 if (route_ipi(apic_dev, apic, &tmp_icr) == -1) {
1356 PrintError("IPI Routing failure\n");
1361 case INT_CMD_HI_OFFSET: {
1362 apic->int_cmd.hi = op_val;
1363 V3_Print("apic %u: core %u: writing command high=0x%x\n", apic->lapic_id.val, core->cpu_id,apic->int_cmd.hi);
1367 // Unhandled Registers
1368 case EXT_APIC_CMD_OFFSET:
1371 PrintError("apic %u: core %u: Write to Unhandled APIC Register: %x (ignored)\n",
1372 apic->lapic_id.val, core->cpu_id, (uint32_t)reg_addr);
1377 PrintDebug("apic %u: core %u: Write finished\n", apic->lapic_id.val, core->cpu_id);
1385 /* Interrupt Controller Functions */
1388 static int apic_intr_pending(struct guest_info * core, void * private_data) {
1389 struct apic_dev_state * apic_dev = (struct apic_dev_state *)(private_data);
1390 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
1391 int req_irq = get_highest_irr(apic);
1392 int svc_irq = get_highest_isr(apic);
1394 // PrintDebug("apic %u: core %u: req_irq=%d, svc_irq=%d\n",apic->lapic_id.val,info->cpu_id,req_irq,svc_irq);
1396 if ((req_irq >= 0) &&
1397 (req_irq > svc_irq)) {
1406 static int apic_get_intr_number(struct guest_info * core, void * private_data) {
1407 struct apic_dev_state * apic_dev = (struct apic_dev_state *)(private_data);
1408 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
1409 int req_irq = get_highest_irr(apic);
1410 int svc_irq = get_highest_isr(apic);
1412 if (svc_irq == -1) {
1414 } else if (svc_irq < req_irq) {
1423 int v3_apic_send_ipi(struct v3_vm_info * vm, struct v3_gen_ipi * ipi, void * dev_data) {
1424 struct apic_dev_state * apic_dev = (struct apic_dev_state *)
1425 (((struct vm_device *)dev_data)->private_data);
1426 struct int_cmd_reg tmp_icr;
1428 // zero out all the fields
1431 tmp_icr.vec = ipi->vector;
1432 tmp_icr.del_mode = ipi->mode;
1433 tmp_icr.dst_mode = ipi->logical;
1434 tmp_icr.trig_mode = ipi->trigger_mode;
1435 tmp_icr.dst_shorthand = ipi->dst_shorthand;
1436 tmp_icr.dst = ipi->dst;
1439 return route_ipi(apic_dev, NULL, &tmp_icr);
1443 int v3_apic_raise_intr(struct v3_vm_info * vm, uint32_t irq, uint32_t dst, void * dev_data) {
1444 struct apic_dev_state * apic_dev = (struct apic_dev_state *)
1445 (((struct vm_device*)dev_data)->private_data);
1446 struct apic_state * apic = &(apic_dev->apics[dst]);
1449 PrintDebug("apic %u core ?: raising interrupt IRQ %u (dst = %u).\n", apic->lapic_id.val, irq, dst);
1451 do_xcall = activate_apic_irq(apic, irq);
1454 PrintError("Failed to activate apic irq\n");
1458 if (do_xcall > 0 && (V3_Get_CPU() != dst)) {
1459 #ifdef CONFIG_MULTITHREAD_OS
1460 v3_interrupt_cpu(vm, dst, 0);
1472 static int apic_begin_irq(struct guest_info * core, void * private_data, int irq) {
1473 struct apic_dev_state * apic_dev = (struct apic_dev_state *)(private_data);
1474 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
1475 int major_offset = (irq & ~0x00000007) >> 3;
1476 int minor_offset = irq & 0x00000007;
1477 uint8_t *req_location = apic->int_req_reg + major_offset;
1478 uint8_t *svc_location = apic->int_svc_reg + major_offset;
1479 uint8_t flag = 0x01 << minor_offset;
1481 if (*req_location & flag) {
1482 // we will only pay attention to a begin irq if we
1483 // know that we initiated it!
1484 *svc_location |= flag;
1485 *req_location &= ~flag;
1488 //PrintDebug("apic %u: core %u: begin irq for %d ignored since I don't own it\n",
1489 // apic->lapic_id.val, core->cpu_id, irq);
1499 /* Timer Functions */
1501 static void apic_update_time(struct guest_info * core,
1502 uint64_t cpu_cycles, uint64_t cpu_freq,
1504 struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
1505 struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
1507 // The 32 bit GCC runtime is a pile of shit
1509 uint64_t tmr_ticks = 0;
1511 uint32_t tmr_ticks = 0;
1514 uint8_t tmr_div = *(uint8_t *)&(apic->tmr_div_cfg.val);
1515 uint_t shift_num = 0;
1518 // Check whether this is true:
1519 // -> If the Init count is zero then the timer is disabled
1520 // and doesn't just blitz interrupts to the CPU
1521 if ((apic->tmr_init_cnt == 0) ||
1522 ( (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_ONESHOT) &&
1523 (apic->tmr_cur_cnt == 0))) {
1524 //PrintDebug("apic %u: core %u: APIC timer not yet initialized\n",apic->lapic_id.val,info->cpu_id);
1542 case APIC_TMR_DIV16:
1545 case APIC_TMR_DIV32:
1548 case APIC_TMR_DIV64:
1551 case APIC_TMR_DIV128:
1555 PrintError("apic %u: core %u: Invalid Timer Divider configuration\n",
1556 apic->lapic_id.val, core->cpu_id);
1560 tmr_ticks = cpu_cycles >> shift_num;
1561 // PrintDebug("Timer Ticks: %p\n", (void *)tmr_ticks);
1563 if (tmr_ticks < apic->tmr_cur_cnt) {
1564 apic->tmr_cur_cnt -= tmr_ticks;
1566 tmr_ticks -= apic->tmr_cur_cnt;
1567 apic->tmr_cur_cnt = 0;
1570 PrintDebug("apic %u: core %u: Raising APIC Timer interrupt (periodic=%d) (icnt=%d) (div=%d)\n",
1571 apic->lapic_id.val, core->cpu_id,
1572 apic->tmr_vec_tbl.tmr_mode, apic->tmr_init_cnt, shift_num);
1574 if (apic_intr_pending(core, priv_data)) {
1575 PrintDebug("apic %u: core %u: Overriding pending IRQ %d\n",
1576 apic->lapic_id.val, core->cpu_id,
1577 apic_get_intr_number(core, priv_data));
1580 if (activate_internal_irq(apic, APIC_TMR_INT) == -1) {
1581 PrintError("apic %u: core %u: Could not raise Timer interrupt\n",
1582 apic->lapic_id.val, core->cpu_id);
1585 if (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_PERIODIC) {
1586 tmr_ticks = tmr_ticks % apic->tmr_init_cnt;
1587 apic->tmr_cur_cnt = apic->tmr_init_cnt - tmr_ticks;
1595 static struct intr_ctrl_ops intr_ops = {
1596 .intr_pending = apic_intr_pending,
1597 .get_intr_number = apic_get_intr_number,
1598 .begin_irq = apic_begin_irq,
1602 static struct v3_timer_ops timer_ops = {
1603 .update_timer = apic_update_time,
1609 static int apic_free(struct apic_dev_state * apic_dev) {
1611 struct v3_vm_info * vm = NULL;
1613 for (i = 0; i < apic_dev->num_apics; i++) {
1614 struct apic_state * apic = &(apic_dev->apics[i]);
1615 struct guest_info * core = apic->core;
1619 v3_remove_intr_controller(core, apic->controller_handle);
1622 v3_remove_timer(core, apic->timer);
1629 v3_unhook_msr(vm, BASE_ADDR_MSR);
1636 static struct v3_device_ops dev_ops = {
1637 .free = (int (*)(void *))apic_free,
1642 static int apic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
1643 char * dev_id = v3_cfg_val(cfg, "ID");
1644 struct apic_dev_state * apic_dev = NULL;
1647 PrintDebug("apic: creating an APIC for each core\n");
1649 apic_dev = (struct apic_dev_state *)V3_Malloc(sizeof(struct apic_dev_state) +
1650 sizeof(struct apic_state) * vm->num_cores);
1652 apic_dev->num_apics = vm->num_cores;
1654 struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, apic_dev);
1657 PrintError("apic: Could not attach device %s\n", dev_id);
1663 for (i = 0; i < vm->num_cores; i++) {
1664 struct apic_state * apic = &(apic_dev->apics[i]);
1665 struct guest_info * core = &(vm->cores[i]);
1669 init_apic_state(apic, i);
1671 apic->controller_handle = v3_register_intr_controller(core, &intr_ops, apic_dev);
1673 apic->timer = v3_add_timer(core, &timer_ops, apic_dev);
1675 if (apic->timer == NULL) {
1676 PrintError("APIC: Failed to attach timer to core %d\n", i);
1677 v3_remove_device(dev);
1681 v3_hook_full_mem(vm, core->cpu_id, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, apic_dev);
1683 PrintDebug("apic %u: (setup device): done, my id is %u\n", i, apic->lapic_id.val);
1686 #ifdef CONFIG_DEBUG_APIC
1687 for (i = 0; i < vm->num_cores; i++) {
1688 struct apic_state * apic = &(apic_dev->apics[i]);
1689 PrintDebug("apic: sanity check: apic %u (at %p) has id %u and msr value %llx and core at %p\n",
1690 i, apic, apic->lapic_id.val, apic->base_addr_msr.value,apic->core);
1695 PrintDebug("apic: priv_data is at %p\n", apic_dev);
1697 v3_hook_msr(vm, BASE_ADDR_MSR, read_apic_msr, write_apic_msr, apic_dev);
1704 device_register("LAPIC", apic_init)