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 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 #include <devices/apic.h>
22 #include <devices/apic_regs.h>
23 #include <devices/icc_bus.h>
24 #include <palacios/vmm.h>
25 #include <palacios/vmm_msr.h>
26 #include <palacios/vmm_sprintf.h>
27 #include <palacios/vm_guest.h>
30 #ifndef CONFIG_DEBUG_APIC
32 #define PrintDebug(fmt, args...)
36 typedef enum { APIC_TMR_INT, APIC_THERM_INT, APIC_PERF_INT,
37 APIC_LINT0_INT, APIC_LINT1_INT, APIC_ERR_INT } apic_irq_type_t;
39 #define APIC_FIXED_DELIVERY 0x0
40 #define APIC_SMI_DELIVERY 0x2
41 #define APIC_NMI_DELIVERY 0x4
42 #define APIC_INIT_DELIVERY 0x5
43 #define APIC_EXTINT_DELIVERY 0x7
46 #define BASE_ADDR_MSR 0x0000001B
47 #define DEFAULT_BASE_ADDR 0xfee00000
49 #define APIC_ID_OFFSET 0x020
50 #define APIC_VERSION_OFFSET 0x030
51 #define TPR_OFFSET 0x080
52 #define APR_OFFSET 0x090
53 #define PPR_OFFSET 0x0a0
54 #define EOI_OFFSET 0x0b0
55 #define REMOTE_READ_OFFSET 0x0c0
56 #define LDR_OFFSET 0x0d0
57 #define DFR_OFFSET 0x0e0
58 #define SPURIOUS_INT_VEC_OFFSET 0x0f0
60 #define ISR_OFFSET0 0x100 // 0x100 - 0x170
61 #define ISR_OFFSET1 0x110 // 0x100 - 0x170
62 #define ISR_OFFSET2 0x120 // 0x100 - 0x170
63 #define ISR_OFFSET3 0x130 // 0x100 - 0x170
64 #define ISR_OFFSET4 0x140 // 0x100 - 0x170
65 #define ISR_OFFSET5 0x150 // 0x100 - 0x170
66 #define ISR_OFFSET6 0x160 // 0x100 - 0x170
67 #define ISR_OFFSET7 0x170 // 0x100 - 0x170
69 #define TRIG_OFFSET0 0x180 // 0x180 - 0x1f0
70 #define TRIG_OFFSET1 0x190 // 0x180 - 0x1f0
71 #define TRIG_OFFSET2 0x1a0 // 0x180 - 0x1f0
72 #define TRIG_OFFSET3 0x1b0 // 0x180 - 0x1f0
73 #define TRIG_OFFSET4 0x1c0 // 0x180 - 0x1f0
74 #define TRIG_OFFSET5 0x1d0 // 0x180 - 0x1f0
75 #define TRIG_OFFSET6 0x1e0 // 0x180 - 0x1f0
76 #define TRIG_OFFSET7 0x1f0 // 0x180 - 0x1f0
79 #define IRR_OFFSET0 0x200 // 0x200 - 0x270
80 #define IRR_OFFSET1 0x210 // 0x200 - 0x270
81 #define IRR_OFFSET2 0x220 // 0x200 - 0x270
82 #define IRR_OFFSET3 0x230 // 0x200 - 0x270
83 #define IRR_OFFSET4 0x240 // 0x200 - 0x270
84 #define IRR_OFFSET5 0x250 // 0x200 - 0x270
85 #define IRR_OFFSET6 0x260 // 0x200 - 0x270
86 #define IRR_OFFSET7 0x270 // 0x200 - 0x270
89 #define ESR_OFFSET 0x280
90 #define INT_CMD_LO_OFFSET 0x300
91 #define INT_CMD_HI_OFFSET 0x310
92 #define TMR_LOC_VEC_TBL_OFFSET 0x320
93 #define THERM_LOC_VEC_TBL_OFFSET 0x330
94 #define PERF_CTR_LOC_VEC_TBL_OFFSET 0x340
95 #define LINT0_VEC_TBL_OFFSET 0x350
96 #define LINT1_VEC_TBL_OFFSET 0x360
97 #define ERR_VEC_TBL_OFFSET 0x370
98 #define TMR_INIT_CNT_OFFSET 0x380
99 #define TMR_CUR_CNT_OFFSET 0x390
100 #define TMR_DIV_CFG_OFFSET 0x3e0
101 #define EXT_APIC_FEATURE_OFFSET 0x400
102 #define EXT_APIC_CMD_OFFSET 0x410
103 #define SEOI_OFFSET 0x420
105 #define IER_OFFSET0 0x480 // 0x480 - 0x4f0
106 #define IER_OFFSET1 0x490 // 0x480 - 0x4f0
107 #define IER_OFFSET2 0x4a0 // 0x480 - 0x4f0
108 #define IER_OFFSET3 0x4b0 // 0x480 - 0x4f0
109 #define IER_OFFSET4 0x4c0 // 0x480 - 0x4f0
110 #define IER_OFFSET5 0x4d0 // 0x480 - 0x4f0
111 #define IER_OFFSET6 0x4e0 // 0x480 - 0x4f0
112 #define IER_OFFSET7 0x4f0 // 0x480 - 0x4f0
114 #define EXT_INT_LOC_VEC_TBL_OFFSET0 0x500 // 0x500 - 0x530
115 #define EXT_INT_LOC_VEC_TBL_OFFSET1 0x510 // 0x500 - 0x530
116 #define EXT_INT_LOC_VEC_TBL_OFFSET2 0x520 // 0x500 - 0x530
117 #define EXT_INT_LOC_VEC_TBL_OFFSET3 0x530 // 0x500 - 0x530
126 uint8_t bootstrap_cpu : 1;
128 uint8_t apic_enable : 1;
129 uint64_t base_addr : 40;
131 } __attribute__((packed));
132 } __attribute__((packed));
133 } __attribute__((packed));
142 struct apic_msr base_addr_msr;
145 /* memory map registers */
147 struct lapic_id_reg lapic_id;
148 struct apic_ver_reg apic_ver;
149 struct ext_apic_ctrl_reg ext_apic_ctrl;
150 struct local_vec_tbl_reg local_vec_tbl;
151 struct tmr_vec_tbl_reg tmr_vec_tbl;
152 struct tmr_div_cfg_reg tmr_div_cfg;
153 struct lint_vec_tbl_reg lint0_vec_tbl;
154 struct lint_vec_tbl_reg lint1_vec_tbl;
155 struct perf_ctr_loc_vec_tbl_reg perf_ctr_loc_vec_tbl;
156 struct therm_loc_vec_tbl_reg therm_loc_vec_tbl;
157 struct err_vec_tbl_reg err_vec_tbl;
158 struct err_status_reg err_status;
159 struct spurious_int_reg spurious_int;
160 struct int_cmd_reg int_cmd;
161 struct log_dst_reg log_dst;
162 struct dst_fmt_reg dst_fmt;
163 struct arb_prio_reg arb_prio;
164 struct task_prio_reg task_prio;
165 struct proc_prio_reg proc_prio;
166 struct ext_apic_feature_reg ext_apic_feature;
167 struct spec_eoi_reg spec_eoi;
170 uint32_t tmr_cur_cnt;
171 uint32_t tmr_init_cnt;
174 struct local_vec_tbl_reg ext_intr_vec_tbl[4];
176 uint32_t rem_rd_data;
179 uint8_t int_req_reg[32];
180 uint8_t int_svc_reg[32];
181 uint8_t int_en_reg[32];
182 uint8_t trig_mode_reg[32];
186 struct vm_device * icc_bus;
191 static int apic_read(struct guest_info * core, addr_t guest_addr, void * dst, uint_t length, void * priv_data);
192 static int apic_write(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data);
194 static void init_apic_state(struct apic_state * apic, uint32_t id, struct vm_device * icc) {
195 apic->base_addr = DEFAULT_BASE_ADDR;
198 // boot processor, enabled
199 apic->base_addr_msr.value = 0x0000000000000900LL;
201 // ap processor, enabled
202 apic->base_addr_msr.value = 0x0000000000000800LL;
205 // same base address regardless of ap or main
206 apic->base_addr_msr.value |= ((uint64_t)DEFAULT_BASE_ADDR);
208 PrintDebug("apic %u: (init_apic_state): msr=0x%llx\n",id, apic->base_addr_msr.value);
210 PrintDebug("apic %u: (init_apic_state): Sizeof Interrupt Request Register %d, should be 32\n",
211 id, (uint_t)sizeof(apic->int_req_reg));
213 memset(apic->int_req_reg, 0, sizeof(apic->int_req_reg));
214 memset(apic->int_svc_reg, 0, sizeof(apic->int_svc_reg));
215 memset(apic->int_en_reg, 0xff, sizeof(apic->int_en_reg));
216 memset(apic->trig_mode_reg, 0, sizeof(apic->trig_mode_reg));
218 apic->eoi = 0x00000000;
219 apic->rem_rd_data = 0x00000000;
220 apic->tmr_init_cnt = 0x00000000;
221 apic->tmr_cur_cnt = 0x00000000;
223 apic->lapic_id.val = id;
227 // The P6 has 6 LVT entries, so we set the value to (6-1)...
228 apic->apic_ver.val = 0x80050010;
230 apic->task_prio.val = 0x00000000;
231 apic->arb_prio.val = 0x00000000;
232 apic->proc_prio.val = 0x00000000;
233 apic->log_dst.val = 0x00000000;
234 apic->dst_fmt.val = 0xffffffff;
235 apic->spurious_int.val = 0x000000ff;
236 apic->err_status.val = 0x00000000;
237 apic->int_cmd.val = 0x0000000000000000LL;
238 apic->tmr_vec_tbl.val = 0x00010000;
239 apic->therm_loc_vec_tbl.val = 0x00010000;
240 apic->perf_ctr_loc_vec_tbl.val = 0x00010000;
241 apic->lint0_vec_tbl.val = 0x00010000;
242 apic->lint1_vec_tbl.val = 0x00010000;
243 apic->err_vec_tbl.val = 0x00010000;
244 apic->tmr_div_cfg.val = 0x00000000;
245 //apic->ext_apic_feature.val = 0x00000007;
246 apic->ext_apic_feature.val = 0x00040007;
247 apic->ext_apic_ctrl.val = 0x00000000;
248 apic->spec_eoi.val = 0x00000000;
250 v3_lock_init(&(apic->lock));
256 static int read_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t * dst, void * priv_data) {
257 struct vm_device * dev = (struct vm_device *)priv_data;
258 struct apic_state * apics = (struct apic_state *)(dev->private_data);
259 struct apic_state * apic = &(apics[core->cpu_id]);
261 PrintDebug("apic %u: core %u: MSR read\n", apic->lapic_id.val, core->cpu_id);
263 dst->value = apic->base_addr;
264 v3_unlock(apic->lock);
269 static int write_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t src, void * priv_data) {
270 struct vm_device * dev = (struct vm_device *)priv_data;
271 struct apic_state * apics = (struct apic_state *)(dev->private_data);
272 struct apic_state * apic = &(apics[core->cpu_id]);
273 struct v3_mem_region * old_reg = v3_get_mem_region(dev->vm, core->cpu_id, apic->base_addr);
276 PrintDebug("apic %u: core %u: MSR write\n",apic->lapic_id.val,core->cpu_id);
278 if (old_reg == NULL) {
280 PrintError("apic %u: core %u: APIC Base address region does not exit...\n",
281 apic->lapic_id.val, core->cpu_id);
287 v3_delete_mem_region(dev->vm, old_reg);
289 apic->base_addr = src.value;
291 if (v3_hook_full_mem(dev->vm, core->cpu_id, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, dev) == -1) {
292 PrintError("apic %u: core %u: Could not hook new APIC Base address\n",
293 apic->lapic_id.val, core->cpu_id);
294 v3_unlock(apic->lock);
298 v3_unlock(apic->lock);
303 // irq_num is the bit offset into a 256 bit buffer...
304 static int activate_apic_irq(struct apic_state * apic, uint32_t irq_num) {
305 int major_offset = (irq_num & ~0x00000007) >> 3;
306 int minor_offset = irq_num & 0x00000007;
307 uint8_t * req_location = apic->int_req_reg + major_offset;
308 uint8_t * en_location = apic->int_en_reg + major_offset;
309 uint8_t flag = 0x1 << minor_offset;
314 // PrintError("apic %u: core ?: Attempting to raise an invalid interrupt: %d\n", apic->lapic_id.val,irq_num);
319 PrintDebug("apic %u: core ?: Raising APIC IRQ %d\n", apic->lapic_id.val, irq_num);
321 if (*req_location & flag) {
322 //V3_Print("Interrupts coallescing\n");
325 if (*en_location & flag) {
326 *req_location |= flag;
328 PrintDebug("apic %u: core ?: Interrupt not enabled... %.2x\n",
329 apic->lapic_id.val, *en_location);
338 static int get_highest_isr(struct apic_state * apic) {
341 // We iterate backwards to find the highest priority
342 for (i = 31; i >= 0; i--) {
343 uint8_t * svc_major = apic->int_svc_reg + i;
345 if ((*svc_major) & 0xff) {
346 for (j = 7; j >= 0; j--) {
347 uint8_t flag = 0x1 << j;
348 if ((*svc_major) & flag) {
349 return ((i * 8) + j);
360 static int get_highest_irr(struct apic_state * apic) {
363 // We iterate backwards to find the highest priority
364 for (i = 31; i >= 0; i--) {
365 uint8_t * req_major = apic->int_req_reg + i;
367 if ((*req_major) & 0xff) {
368 for (j = 7; j >= 0; j--) {
369 uint8_t flag = 0x1 << j;
370 if ((*req_major) & flag) {
371 return ((i * 8) + j);
383 static int apic_do_eoi(struct apic_state * apic) {
384 int isr_irq = get_highest_isr(apic);
387 int major_offset = (isr_irq & ~0x00000007) >> 3;
388 int minor_offset = isr_irq & 0x00000007;
389 uint8_t flag = 0x1 << minor_offset;
390 uint8_t * svc_location = apic->int_svc_reg + major_offset;
392 PrintDebug("apic %u: core ?: Received APIC EOI for IRQ %d\n", apic->lapic_id.val,isr_irq);
394 *svc_location &= ~flag;
396 #ifdef CONFIG_CRAY_XT
398 if ((isr_irq == 238) ||
400 PrintDebug("apic %u: core ?: Acking IRQ %d\n", apic->lapic_id.val,isr_irq);
403 if (isr_irq == 238) {
408 //PrintError("apic %u: core ?: Spurious EOI...\n",apic->lapic_id.val);
415 static int activate_internal_irq(struct apic_state * apic, apic_irq_type_t int_type) {
416 uint32_t vec_num = 0;
417 uint32_t del_mode = 0;
423 vec_num = apic->tmr_vec_tbl.vec;
424 del_mode = APIC_FIXED_DELIVERY;
425 masked = apic->tmr_vec_tbl.mask;
428 vec_num = apic->therm_loc_vec_tbl.vec;
429 del_mode = apic->therm_loc_vec_tbl.msg_type;
430 masked = apic->therm_loc_vec_tbl.mask;
433 vec_num = apic->perf_ctr_loc_vec_tbl.vec;
434 del_mode = apic->perf_ctr_loc_vec_tbl.msg_type;
435 masked = apic->perf_ctr_loc_vec_tbl.mask;
438 vec_num = apic->lint0_vec_tbl.vec;
439 del_mode = apic->lint0_vec_tbl.msg_type;
440 masked = apic->lint0_vec_tbl.mask;
443 vec_num = apic->lint1_vec_tbl.vec;
444 del_mode = apic->lint1_vec_tbl.msg_type;
445 masked = apic->lint1_vec_tbl.mask;
448 vec_num = apic->err_vec_tbl.vec;
449 del_mode = APIC_FIXED_DELIVERY;
450 masked = apic->err_vec_tbl.mask;
453 PrintError("apic %u: core ?: Invalid APIC interrupt type\n", apic->lapic_id.val);
457 // interrupt is masked, don't send
459 PrintDebug("apic %u: core ?: Inerrupt is masked\n", apic->lapic_id.val);
463 if (del_mode == APIC_FIXED_DELIVERY) {
464 //PrintDebug("Activating internal APIC IRQ %d\n", vec_num);
465 return activate_apic_irq(apic, vec_num);
467 PrintError("apic %u: core ?: Unhandled Delivery Mode\n", apic->lapic_id.val);
473 static int apic_read(struct guest_info * core, addr_t guest_addr, void * dst, uint_t length, void * priv_data) {
474 struct apic_state * apic = (struct apic_state *)(priv_data);
475 addr_t reg_addr = guest_addr - apic->base_addr;
476 struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
480 PrintDebug("apic %u: core %u: at %p: Read apic address space (%p)\n",
481 apic->lapic_id.val, core->cpu_id, apic, (void *)guest_addr);
483 if (msr->apic_enable == 0) {
484 PrintError("apic %u: core %u: Read from APIC address space with disabled APIC, apic msr=0x%llx\n",
485 apic->lapic_id.val, core->cpu_id, apic->base_addr_msr.value);
491 /* Because "May not be supported" doesn't matter to Linux developers... */
492 /* if (length != 4) { */
493 /* PrintError("Invalid apic read length (%d)\n", length); */
497 switch (reg_addr & ~0x3) {
499 // Well, only an idiot would read from a architectural write only register
501 // PrintError("Attempting to read from write only register\n");
507 val = apic->lapic_id.val;
509 case APIC_VERSION_OFFSET:
510 val = apic->apic_ver.val;
513 val = apic->task_prio.val;
516 val = apic->arb_prio.val;
519 val = apic->proc_prio.val;
521 case REMOTE_READ_OFFSET:
522 val = apic->rem_rd_data;
525 val = apic->log_dst.val;
528 val = apic->dst_fmt.val;
530 case SPURIOUS_INT_VEC_OFFSET:
531 val = apic->spurious_int.val;
534 val = apic->err_status.val;
536 case TMR_LOC_VEC_TBL_OFFSET:
537 val = apic->tmr_vec_tbl.val;
539 case LINT0_VEC_TBL_OFFSET:
540 val = apic->lint0_vec_tbl.val;
542 case LINT1_VEC_TBL_OFFSET:
543 val = apic->lint1_vec_tbl.val;
545 case ERR_VEC_TBL_OFFSET:
546 val = apic->err_vec_tbl.val;
548 case TMR_INIT_CNT_OFFSET:
549 val = apic->tmr_init_cnt;
551 case TMR_DIV_CFG_OFFSET:
552 val = apic->tmr_div_cfg.val;
556 val = *(uint32_t *)(apic->int_en_reg);
559 val = *(uint32_t *)(apic->int_en_reg + 4);
562 val = *(uint32_t *)(apic->int_en_reg + 8);
565 val = *(uint32_t *)(apic->int_en_reg + 12);
568 val = *(uint32_t *)(apic->int_en_reg + 16);
571 val = *(uint32_t *)(apic->int_en_reg + 20);
574 val = *(uint32_t *)(apic->int_en_reg + 24);
577 val = *(uint32_t *)(apic->int_en_reg + 28);
581 val = *(uint32_t *)(apic->int_svc_reg);
584 val = *(uint32_t *)(apic->int_svc_reg + 4);
587 val = *(uint32_t *)(apic->int_svc_reg + 8);
590 val = *(uint32_t *)(apic->int_svc_reg + 12);
593 val = *(uint32_t *)(apic->int_svc_reg + 16);
596 val = *(uint32_t *)(apic->int_svc_reg + 20);
599 val = *(uint32_t *)(apic->int_svc_reg + 24);
602 val = *(uint32_t *)(apic->int_svc_reg + 28);
606 val = *(uint32_t *)(apic->trig_mode_reg);
609 val = *(uint32_t *)(apic->trig_mode_reg + 4);
612 val = *(uint32_t *)(apic->trig_mode_reg + 8);
615 val = *(uint32_t *)(apic->trig_mode_reg + 12);
618 val = *(uint32_t *)(apic->trig_mode_reg + 16);
621 val = *(uint32_t *)(apic->trig_mode_reg + 20);
624 val = *(uint32_t *)(apic->trig_mode_reg + 24);
627 val = *(uint32_t *)(apic->trig_mode_reg + 28);
631 val = *(uint32_t *)(apic->int_req_reg);
634 val = *(uint32_t *)(apic->int_req_reg + 4);
637 val = *(uint32_t *)(apic->int_req_reg + 8);
640 val = *(uint32_t *)(apic->int_req_reg + 12);
643 val = *(uint32_t *)(apic->int_req_reg + 16);
646 val = *(uint32_t *)(apic->int_req_reg + 20);
649 val = *(uint32_t *)(apic->int_req_reg + 24);
652 val = *(uint32_t *)(apic->int_req_reg + 28);
654 case TMR_CUR_CNT_OFFSET:
655 val = apic->tmr_cur_cnt;
658 // We are not going to implement these....
659 case THERM_LOC_VEC_TBL_OFFSET:
660 val = apic->therm_loc_vec_tbl.val;
662 case PERF_CTR_LOC_VEC_TBL_OFFSET:
663 val = apic->perf_ctr_loc_vec_tbl.val;
669 case INT_CMD_LO_OFFSET:
670 val = apic->int_cmd.lo;
672 case INT_CMD_HI_OFFSET:
673 val = apic->int_cmd.hi;
676 // handle current timer count
678 // Unhandled Registers
679 case EXT_INT_LOC_VEC_TBL_OFFSET0:
680 val = apic->ext_intr_vec_tbl[0].val;
682 case EXT_INT_LOC_VEC_TBL_OFFSET1:
683 val = apic->ext_intr_vec_tbl[1].val;
685 case EXT_INT_LOC_VEC_TBL_OFFSET2:
686 val = apic->ext_intr_vec_tbl[2].val;
688 case EXT_INT_LOC_VEC_TBL_OFFSET3:
689 val = apic->ext_intr_vec_tbl[3].val;
693 case EXT_APIC_FEATURE_OFFSET:
694 case EXT_APIC_CMD_OFFSET:
698 PrintError("apic %u: core %u: Read from Unhandled APIC Register: %x (getting zero)\n",
699 apic->lapic_id.val, core->cpu_id, (uint32_t)reg_addr);
705 uint_t byte_addr = reg_addr & 0x3;
706 uint8_t * val_ptr = (uint8_t *)dst;
708 *val_ptr = *(((uint8_t *)&val) + byte_addr);
710 } else if ((length == 2) &&
711 ((reg_addr & 0x3) == 0x3)) {
712 uint_t byte_addr = reg_addr & 0x3;
713 uint16_t * val_ptr = (uint16_t *)dst;
714 *val_ptr = *(((uint16_t *)&val) + byte_addr);
716 } else if (length == 4) {
717 uint32_t * val_ptr = (uint32_t *)dst;
721 PrintError("apic %u: core %u: Invalid apic read length (%d)\n",
722 apic->lapic_id.val, core->cpu_id, length);
726 PrintDebug("apic %u: core %u: Read finished (val=%x)\n",
727 apic->lapic_id.val, core->cpu_id, *(uint32_t *)dst);
736 static int apic_write(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data) {
737 struct apic_state * apic = (struct apic_state *)(priv_data);
738 addr_t reg_addr = guest_addr - apic->base_addr;
739 struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
740 uint32_t op_val = *(uint32_t *)src;
742 PrintDebug("apic %u: core %u: at %p and priv_data is at %p\n",
743 apic->lapic_id.val, core->cpu_id, apic, priv_data);
745 PrintDebug("Write to address space (%p) (val=%x)\n",
746 (void *)guest_addr, *(uint32_t *)src);
748 if (msr->apic_enable == 0) {
749 PrintError("apic %u: core %u: Write to APIC address space with disabled APIC, apic msr=0x%llx\n",
750 apic->lapic_id.val, core->cpu_id, apic->base_addr_msr.value);
756 PrintError("apic %u: core %u: Invalid apic write length (%d)\n",
757 apic->lapic_id.val, length, core->cpu_id);
762 case REMOTE_READ_OFFSET:
763 case APIC_VERSION_OFFSET:
790 case EXT_APIC_FEATURE_OFFSET:
792 PrintError("apic %u: core %u: Attempting to write to read only register %p (error)\n",
793 apic->lapic_id.val, core->cpu_id, (void *)reg_addr);
800 PrintDebug("apic %u: core %u: my id is being changed to %u\n",
801 apic->lapic_id.val, core->cpu_id, op_val);
803 apic->lapic_id.val = op_val;
806 apic->task_prio.val = op_val;
809 apic->log_dst.val = op_val;
812 apic->dst_fmt.val = op_val;
814 case SPURIOUS_INT_VEC_OFFSET:
815 apic->spurious_int.val = op_val;
818 apic->err_status.val = op_val;
820 case TMR_LOC_VEC_TBL_OFFSET:
821 apic->tmr_vec_tbl.val = op_val;
823 case THERM_LOC_VEC_TBL_OFFSET:
824 apic->therm_loc_vec_tbl.val = op_val;
826 case PERF_CTR_LOC_VEC_TBL_OFFSET:
827 apic->perf_ctr_loc_vec_tbl.val = op_val;
829 case LINT0_VEC_TBL_OFFSET:
830 apic->lint0_vec_tbl.val = op_val;
832 case LINT1_VEC_TBL_OFFSET:
833 apic->lint1_vec_tbl.val = op_val;
835 case ERR_VEC_TBL_OFFSET:
836 apic->err_vec_tbl.val = op_val;
838 case TMR_INIT_CNT_OFFSET:
839 apic->tmr_init_cnt = op_val;
840 apic->tmr_cur_cnt = op_val;
842 case TMR_CUR_CNT_OFFSET:
843 apic->tmr_cur_cnt = op_val;
845 case TMR_DIV_CFG_OFFSET:
846 apic->tmr_div_cfg.val = op_val;
850 // Enable mask (256 bits)
852 *(uint32_t *)(apic->int_en_reg) = op_val;
855 *(uint32_t *)(apic->int_en_reg + 4) = op_val;
858 *(uint32_t *)(apic->int_en_reg + 8) = op_val;
861 *(uint32_t *)(apic->int_en_reg + 12) = op_val;
864 *(uint32_t *)(apic->int_en_reg + 16) = op_val;
867 *(uint32_t *)(apic->int_en_reg + 20) = op_val;
870 *(uint32_t *)(apic->int_en_reg + 24) = op_val;
873 *(uint32_t *)(apic->int_en_reg + 28) = op_val;
876 case EXT_INT_LOC_VEC_TBL_OFFSET0:
877 apic->ext_intr_vec_tbl[0].val = op_val;
879 case EXT_INT_LOC_VEC_TBL_OFFSET1:
880 apic->ext_intr_vec_tbl[1].val = op_val;
882 case EXT_INT_LOC_VEC_TBL_OFFSET2:
883 apic->ext_intr_vec_tbl[2].val = op_val;
885 case EXT_INT_LOC_VEC_TBL_OFFSET3:
886 apic->ext_intr_vec_tbl[3].val = op_val;
896 case INT_CMD_LO_OFFSET:
897 apic->int_cmd.lo = op_val;
900 PrintDebug("apic %u: core %u: sending cmd 0x%llx to apic %u\n",
901 apic->clapic_id.val, core->cpu_id,
902 apic->int_cmd.val, apic->int_cmd.dst);
904 v3_icc_send_ipi(apic->icc_bus, apic->lapic_id.val, apic->int_cmd.val, 0);
907 case INT_CMD_HI_OFFSET:
908 apic->int_cmd.hi = op_val;
912 // Unhandled Registers
913 case EXT_APIC_CMD_OFFSET:
916 PrintError("apic %u: core %u: Write to Unhandled APIC Register: %x (ignored)\n",
917 apic->lapic_id.val, core->cpu_id, (uint32_t)reg_addr);
922 PrintDebug("apic %u: core %u: Write finished\n", apic->lapic_id.val, core->cpu_id);
929 /* Interrupt Controller Functions */
931 // returns 1 if an interrupt is pending, 0 otherwise
932 static int apic_intr_pending(struct guest_info * info, void * private_data) {
933 struct apic_state * apic = (struct apic_state *)private_data;
934 int req_irq = get_highest_irr(apic);
935 int svc_irq = get_highest_isr(apic);
937 // PrintDebug("apic %u: core %u: req_irq=%d, svc_irq=%d\n",apic->lapic_id.val,info->cpu_id,req_irq,svc_irq);
939 if ((req_irq >= 0) &&
940 (req_irq > svc_irq)) {
947 static int apic_get_intr_number(struct guest_info * info, void * private_data) {
948 struct apic_state * apic = (struct apic_state *)private_data;
949 int req_irq = get_highest_irr(apic);
950 int svc_irq = get_highest_isr(apic);
954 } else if (svc_irq < req_irq) {
962 static int apic_raise_intr(struct guest_info * info, int irq, void * private_data) {
963 struct apic_state * apic = (struct apic_state *)private_data;
965 return activate_apic_irq(apic, irq);
970 static int apic_begin_irq(struct guest_info * info, void * private_data, int irq) {
971 struct apic_state * apic = (struct apic_state *)private_data;
972 int major_offset = (irq & ~0x00000007) >> 3;
973 int minor_offset = irq & 0x00000007;
974 uint8_t * req_location = apic->int_req_reg + major_offset;
975 uint8_t * svc_location = apic->int_svc_reg + major_offset;
976 uint8_t flag = 0x01 << minor_offset;
978 if (*req_location & flag) {
979 // we will only pay attention to a begin irq if we
980 // know that we initiated it!
981 *svc_location |= flag;
982 *req_location &= ~flag;
985 PrintDebug("apic %u: core %u: begin irq for %d ignored since I don't own it\n",
986 apic->lapic_id.val, info->cpu_id, irq);
995 /* Timer Functions */
996 static void apic_update_time(struct guest_info * info,
997 uint64_t cpu_cycles, uint64_t cpu_freq,
999 struct apic_state * apic = (struct apic_state *)(priv_data);
1000 // The 32 bit GCC runtime is a pile of shit
1002 uint64_t tmr_ticks = 0;
1004 uint32_t tmr_ticks = 0;
1007 uint8_t tmr_div = *(uint8_t *)&(apic->tmr_div_cfg.val);
1008 uint_t shift_num = 0;
1011 // Check whether this is true:
1012 // -> If the Init count is zero then the timer is disabled
1013 // and doesn't just blitz interrupts to the CPU
1014 if ((apic->tmr_init_cnt == 0) ||
1015 ( (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_ONESHOT) &&
1016 (apic->tmr_cur_cnt == 0))) {
1017 //PrintDebug("apic %u: core %u: APIC timer not yet initialized\n",apic->lapic_id.val,info->cpu_id);
1035 case APIC_TMR_DIV16:
1038 case APIC_TMR_DIV32:
1041 case APIC_TMR_DIV64:
1044 case APIC_TMR_DIV128:
1048 PrintError("apic %u: core %u: Invalid Timer Divider configuration\n",
1049 apic->lapic_id.val, info->cpu_id);
1053 tmr_ticks = cpu_cycles >> shift_num;
1054 // PrintDebug("Timer Ticks: %p\n", (void *)tmr_ticks);
1056 if (tmr_ticks < apic->tmr_cur_cnt) {
1057 apic->tmr_cur_cnt -= tmr_ticks;
1059 tmr_ticks -= apic->tmr_cur_cnt;
1060 apic->tmr_cur_cnt = 0;
1063 PrintDebug("apic %u: core %u: Raising APIC Timer interrupt (periodic=%d) (icnt=%d) (div=%d)\n",
1064 apic->lapic_id.val, info->cpu_id,
1065 apic->tmr_vec_tbl.tmr_mode, apic->tmr_init_cnt, shift_num);
1067 if (apic_intr_pending(info, priv_data)) {
1068 PrintDebug("apic %u: core %u: Overriding pending IRQ %d\n",
1069 apic->lapic_id.val, info->cpu_id,
1070 apic_get_intr_number(info, priv_data));
1073 if (activate_internal_irq(apic, APIC_TMR_INT) == -1) {
1074 PrintError("apic %u: core %u: Could not raise Timer interrupt\n",
1075 apic->lapic_id.val, info->cpu_id);
1078 if (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_PERIODIC) {
1079 tmr_ticks = tmr_ticks % apic->tmr_init_cnt;
1080 apic->tmr_cur_cnt = apic->tmr_init_cnt - tmr_ticks;
1088 static struct intr_ctrl_ops intr_ops = {
1089 .intr_pending = apic_intr_pending,
1090 .get_intr_number = apic_get_intr_number,
1091 .begin_irq = apic_begin_irq,
1095 static struct vm_timer_ops timer_ops = {
1096 .update_time = apic_update_time,
1102 static int apic_free(struct vm_device * dev) {
1104 /* TODO: This should crosscall to force an unhook on each CPU */
1106 // struct apic_state * apic = (struct apic_state *)dev->private_data;
1108 v3_unhook_msr(dev->vm, BASE_ADDR_MSR);
1114 static struct v3_device_ops dev_ops = {
1123 static struct v3_icc_ops icc_ops = {
1124 .raise_intr = apic_raise_intr,
1129 static int apic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
1130 PrintDebug("apic: creating an APIC for each core\n");
1131 char * dev_id = v3_cfg_val(cfg, "ID");
1132 char * icc_bus_id = v3_cfg_val(cfg, "bus");
1133 struct vm_device * icc = v3_find_dev(vm, icc_bus_id);
1137 PrintError("apic: Cannot find ICC Bus (%s)\n", icc_bus_id);
1141 // We allocate one apic per core
1142 // APICs are accessed via index which correlates with the core's cpu_id
1143 // 0..num_cores-1 at num_cores is the ioapic (one only)
1144 struct apic_state * apic = (struct apic_state *)V3_Malloc(sizeof(struct apic_state) * vm->num_cores);
1146 struct vm_device * dev = v3_allocate_device(dev_id, &dev_ops, apic);
1148 if (v3_attach_device(vm, dev) == -1) {
1149 PrintError("apic: Could not attach device %s\n", dev_id);
1154 for (i = 0; i < vm->num_cores; i++) {
1155 struct guest_info * core = &(vm->cores[i]);
1157 init_apic_state(&(apic[i]),i,icc);
1159 v3_register_intr_controller(core, &intr_ops, &(apic[i]));
1161 v3_add_timer(core, &timer_ops, &(apic[i]));
1163 v3_hook_full_mem(vm, core->cpu_id, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, &(apic[i]));
1165 v3_icc_register_apic(core, icc, i, &icc_ops, &(apic[i]));
1167 PrintDebug("apic %u: (setup device): done, my id is %u\n", i, apic[i].lapic_id.val);
1171 for (i = 0; i < vm->num_cores; i++) {
1172 PrintDebug("apic: sanity check: apic %u (at %p) has id %u and msr value %llx\n",
1173 i, &(apic[i]), apic[i].lapic_id.val, apic[i].base_addr_msr.value);
1176 PrintDebug("apic: priv_data is at %p\n", apic);
1178 v3_hook_msr(vm, BASE_ADDR_MSR, read_apic_msr, write_apic_msr, dev);
1185 device_register("LAPIC", apic_init)