* Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
* All rights reserved.
*
- * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ * Authors: Jack Lange <jarusl@cs.northwestern.edu>
+ * Peter Dinda <pdinda@northwestern.edu> (SMP)
*
* This is free software. You are permitted to use,
* redistribute, and modify it as specified in the file "V3VEE_LICENSE".
#include <devices/apic_regs.h>
#include <palacios/vmm.h>
#include <palacios/vmm_msr.h>
+#include <palacios/vmm_sprintf.h>
+#include <palacios/vm_guest.h>
+#include <palacios/vmm_types.h>
+
+
+#include <palacios/vmm_queue.h>
+#include <palacios/vmm_lock.h>
+
+/* The locking in this file is nasty.
+ * There are 3 different locking approaches that are taken, depending on the APIC operation
+ * 1. Queue locks. Actual irq insertions are done via queueing irq ops at the dest apic.
+ * The destination apic's core is responsible for draining the queue, and actually
+ * setting the vector table.
+ * 2. State lock. This is a standard lock taken when internal apic state is read/written.
+ * When an irq's destination is determined this lock is taken to examine the apic's
+ * addressability.
+ * 3. VM barrier lock. This is taken when actual VM core state is changed (via SIPI).
+ */
+
+
+#ifndef V3_CONFIG_DEBUG_APIC
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#else
+
+static char * shorthand_str[] = {
+ "(no shorthand)",
+ "(self)",
+ "(all)",
+ "(all-but-me)",
+};
+
+static char * deliverymode_str[] = {
+ "(fixed)",
+ "(lowest priority)",
+ "(SMI)",
+ "(reserved)",
+ "(NMI)",
+ "(INIT)",
+ "(Start Up)",
+ "(ExtInt)",
+};
+
+#endif
typedef enum { APIC_TMR_INT, APIC_THERM_INT, APIC_PERF_INT,
APIC_LINT0_INT, APIC_LINT1_INT, APIC_ERR_INT } apic_irq_type_t;
#define APIC_FIXED_DELIVERY 0x0
+#define APIC_LOWEST_DELIVERY 0x1
#define APIC_SMI_DELIVERY 0x2
+#define APIC_RES1_DELIVERY 0x3
#define APIC_NMI_DELIVERY 0x4
#define APIC_INIT_DELIVERY 0x5
+#define APIC_SIPI_DELIVERY 0x6
#define APIC_EXTINT_DELIVERY 0x7
+#define APIC_SHORTHAND_NONE 0x0
+#define APIC_SHORTHAND_SELF 0x1
+#define APIC_SHORTHAND_ALL 0x2
+#define APIC_SHORTHAND_ALL_BUT_ME 0x3
+
+#define APIC_DEST_PHYSICAL 0x0
+#define APIC_DEST_LOGICAL 0x1
+
-#define BASE_ADDR_MSR 0x0000001B
+#define BASE_ADDR_MSR 0x0000001B
#define DEFAULT_BASE_ADDR 0xfee00000
#define APIC_ID_OFFSET 0x020
#define EXT_INT_LOC_VEC_TBL_OFFSET2 0x520 // 0x500 - 0x530
#define EXT_INT_LOC_VEC_TBL_OFFSET3 0x530 // 0x500 - 0x530
-
-
struct apic_msr {
- union {
- uint64_t val;
- struct {
- uchar_t rsvd;
- uint_t bootstrap_cpu : 1;
- uint_t rsvd2 : 2;
- uint_t apic_enable : 1;
- ullong_t base_addr : 40;
- uint_t rsvd3 : 12;
+ union {
+ uint64_t value;
+ struct {
+ uint8_t rsvd;
+ uint8_t bootstrap_cpu : 1;
+ uint8_t rsvd2 : 2;
+ uint8_t apic_enable : 1;
+ uint64_t base_addr : 40;
+ uint32_t rsvd3 : 12;
+ } __attribute__((packed));
} __attribute__((packed));
- } __attribute__((packed));
} __attribute__((packed));
+typedef enum {INIT_ST,
+ SIPI,
+ STARTED} ipi_state_t;
+
+struct apic_dev_state;
+
struct apic_state {
- addr_t base_addr;
-
- /* MSRs */
- v3_msr_t base_addr_msr;
-
-
- /* memory map registers */
-
- struct lapic_id_reg lapic_id;
- struct apic_ver_reg apic_ver;
- struct ext_apic_ctrl_reg ext_apic_ctrl;
- struct local_vec_tbl_reg local_vec_tbl;
- struct tmr_vec_tbl_reg tmr_vec_tbl;
- struct tmr_div_cfg_reg tmr_div_cfg;
- struct lint_vec_tbl_reg lint0_vec_tbl;
- struct lint_vec_tbl_reg lint1_vec_tbl;
- struct perf_ctr_loc_vec_tbl_reg perf_ctr_loc_vec_tbl;
- struct therm_loc_vec_tbl_reg therm_loc_vec_tbl;
- struct err_vec_tbl_reg err_vec_tbl;
- struct err_status_reg err_status;
- struct spurious_int_reg spurious_int;
- struct int_cmd_reg int_cmd;
- struct log_dst_reg log_dst;
- struct dst_fmt_reg dst_fmt;
- struct arb_prio_reg arb_prio;
- struct task_prio_reg task_prio;
- struct proc_prio_reg proc_prio;
- struct ext_apic_feature_reg ext_apic_feature;
- struct spec_eoi_reg spec_eoi;
+ addr_t base_addr;
+
+ /* MSRs */
+ struct apic_msr base_addr_msr;
+
+
+ /* memory map registers */
+
+ struct lapic_id_reg lapic_id;
+ struct apic_ver_reg apic_ver;
+ struct ext_apic_ctrl_reg ext_apic_ctrl;
+ struct local_vec_tbl_reg local_vec_tbl;
+ struct tmr_vec_tbl_reg tmr_vec_tbl;
+ struct tmr_div_cfg_reg tmr_div_cfg;
+ struct lint_vec_tbl_reg lint0_vec_tbl;
+ struct lint_vec_tbl_reg lint1_vec_tbl;
+ struct perf_ctr_loc_vec_tbl_reg perf_ctr_loc_vec_tbl;
+ struct therm_loc_vec_tbl_reg therm_loc_vec_tbl;
+ struct err_vec_tbl_reg err_vec_tbl;
+ struct err_status_reg err_status;
+ struct spurious_int_reg spurious_int;
+ struct int_cmd_reg int_cmd;
+ struct log_dst_reg log_dst;
+ struct dst_fmt_reg dst_fmt;
+ struct arb_prio_reg arb_prio;
+ struct task_prio_reg task_prio;
+ struct proc_prio_reg proc_prio;
+ struct ext_apic_feature_reg ext_apic_feature;
+ struct spec_eoi_reg spec_eoi;
- uint32_t tmr_cur_cnt;
- uint32_t tmr_init_cnt;
+ uint32_t tmr_cur_cnt;
+ uint32_t tmr_init_cnt;
+ struct local_vec_tbl_reg ext_intr_vec_tbl[4];
- uint32_t rem_rd_data;
+ uint32_t rem_rd_data;
- uchar_t int_req_reg[32];
- uchar_t int_svc_reg[32];
- uchar_t int_en_reg[32];
- uchar_t trig_mode_reg[32];
-
- uint32_t eoi;
+ ipi_state_t ipi_state;
+
+ uint8_t int_req_reg[32];
+ uint8_t int_svc_reg[32];
+ uint8_t int_en_reg[32];
+ uint8_t trig_mode_reg[32];
+
+ struct guest_info * core;
+
+ void * controller_handle;
+
+ struct v3_timer * timer;
+
+
+ struct v3_queue irq_queue;
+
+ uint32_t eoi;
};
-static void init_apic_state(struct apic_state * apic) {
- apic->base_addr = DEFAULT_BASE_ADDR;
- apic->base_addr_msr.value = 0x0000000000000900LL;
- apic->base_addr_msr.value |= ((uint64_t)DEFAULT_BASE_ADDR);
-
- PrintDebug("Sizeof Interrupt Request Register %d, should be 32\n",
- (uint_t)sizeof(apic->int_req_reg));
-
- memset(apic->int_req_reg, 0, sizeof(apic->int_req_reg));
- memset(apic->int_svc_reg, 0, sizeof(apic->int_svc_reg));
- memset(apic->int_en_reg, 0xff, sizeof(apic->int_en_reg));
- memset(apic->trig_mode_reg, 0, sizeof(apic->trig_mode_reg));
-
- apic->eoi = 0x00000000;
- apic->rem_rd_data = 0x00000000;
- apic->tmr_init_cnt = 0x00000000;
- apic->tmr_cur_cnt = 0x00000000;
-
- // TODO:
- // We need to figure out what the APIC ID is....
- apic->lapic_id.val = 0x00000000;
-
- // The P6 has 6 LVT entries, so we set the value to (6-1)...
- apic->apic_ver.val = 0x80050010;
-
- apic->task_prio.val = 0x00000000;
- apic->arb_prio.val = 0x00000000;
- apic->proc_prio.val = 0x00000000;
- apic->log_dst.val = 0x00000000;
- apic->dst_fmt.val = 0xffffffff;
- apic->spurious_int.val = 0x000000ff;
- apic->err_status.val = 0x00000000;
- apic->int_cmd.val = 0x0000000000000000LL;
- apic->tmr_vec_tbl.val = 0x00010000;
- apic->therm_loc_vec_tbl.val = 0x00010000;
- apic->perf_ctr_loc_vec_tbl.val = 0x00010000;
- apic->lint0_vec_tbl.val = 0x00010000;
- apic->lint1_vec_tbl.val = 0x00010000;
- apic->err_vec_tbl.val = 0x00010000;
- apic->tmr_div_cfg.val = 0x00000000;
- apic->ext_apic_feature.val = 0x00040007;
- apic->ext_apic_ctrl.val = 0x00000000;
- apic->spec_eoi.val = 0x00000000;
+
+
+struct apic_dev_state {
+ int num_apics;
+
+ v3_lock_t state_lock;
+
+ struct apic_state apics[0];
+} __attribute__((packed));
+
+
+
+
+
+static int apic_read(struct guest_info * core, addr_t guest_addr, void * dst, uint_t length, void * priv_data);
+static int apic_write(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data);
+
+// No lcoking done
+static void init_apic_state(struct apic_state * apic, uint32_t id) {
+ apic->base_addr = DEFAULT_BASE_ADDR;
+
+ if (id == 0) {
+ // boot processor, enabled
+ apic->base_addr_msr.value = 0x0000000000000900LL;
+ } else {
+ // ap processor, enabled
+ apic->base_addr_msr.value = 0x0000000000000800LL;
+ }
+
+ // same base address regardless of ap or main
+ apic->base_addr_msr.value |= ((uint64_t)DEFAULT_BASE_ADDR);
+
+ PrintDebug("apic %u: (init_apic_state): msr=0x%llx\n",id, apic->base_addr_msr.value);
+
+ PrintDebug("apic %u: (init_apic_state): Sizeof Interrupt Request Register %d, should be 32\n",
+ id, (uint_t)sizeof(apic->int_req_reg));
+
+ memset(apic->int_req_reg, 0, sizeof(apic->int_req_reg));
+ memset(apic->int_svc_reg, 0, sizeof(apic->int_svc_reg));
+ memset(apic->int_en_reg, 0xff, sizeof(apic->int_en_reg));
+ memset(apic->trig_mode_reg, 0, sizeof(apic->trig_mode_reg));
+
+ apic->eoi = 0x00000000;
+ apic->rem_rd_data = 0x00000000;
+ apic->tmr_init_cnt = 0x00000000;
+ apic->tmr_cur_cnt = 0x00000000;
+
+ apic->lapic_id.val = id;
+
+ apic->ipi_state = INIT_ST;
+
+ // The P6 has 6 LVT entries, so we set the value to (6-1)...
+ apic->apic_ver.val = 0x80050010;
+
+ apic->task_prio.val = 0x00000000;
+ apic->arb_prio.val = 0x00000000;
+ apic->proc_prio.val = 0x00000000;
+ apic->log_dst.val = 0x00000000;
+ apic->dst_fmt.val = 0xffffffff;
+ apic->spurious_int.val = 0x000000ff;
+ apic->err_status.val = 0x00000000;
+ apic->int_cmd.val = 0x0000000000000000LL;
+ apic->tmr_vec_tbl.val = 0x00010000;
+ apic->therm_loc_vec_tbl.val = 0x00010000;
+ apic->perf_ctr_loc_vec_tbl.val = 0x00010000;
+ apic->lint0_vec_tbl.val = 0x00010000;
+ apic->lint1_vec_tbl.val = 0x00010000;
+ apic->err_vec_tbl.val = 0x00010000;
+ apic->tmr_div_cfg.val = 0x00000000;
+ //apic->ext_apic_feature.val = 0x00000007;
+ apic->ext_apic_feature.val = 0x00040007;
+ apic->ext_apic_ctrl.val = 0x00000000;
+ apic->spec_eoi.val = 0x00000000;
+
+
+ v3_init_queue(&(apic->irq_queue));
+
+
}
-static int read_apic_msr(uint_t msr, v3_msr_t * dst, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- PrintDebug("READING APIC BASE ADDR: HI=%x LO=%x\n", apic->base_addr_msr.hi, apic->base_addr_msr.lo);
- return -1;
+static int read_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t * dst, void * priv_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)priv_data;
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+
+ PrintDebug("apic %u: core %u: MSR read\n", apic->lapic_id.val, core->vcpu_id);
+
+ dst->value = apic->base_addr;
+
+ return 0;
}
-static int write_apic_msr(uint_t msr, v3_msr_t src, void * priv_data) {
- // struct vm_device * dev = (struct vm_device *)priv_data;
- // struct apic_state * apic = (struct apic_state *)dev->private_data;
+static int write_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t src, void * priv_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)priv_data;
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+ struct v3_mem_region * old_reg = v3_get_mem_region(core->vm_info, core->vcpu_id, apic->base_addr);
+
+
+ PrintDebug("apic %u: core %u: MSR write\n", apic->lapic_id.val, core->vcpu_id);
- PrintDebug("WRITING APIC BASE ADDR: HI=%x LO=%x\n", src.hi, src.lo);
+ if (old_reg == NULL) {
+ // uh oh...
+ PrintError("apic %u: core %u: APIC Base address region does not exit...\n",
+ apic->lapic_id.val, core->vcpu_id);
+ return -1;
+ }
+
+
+
+ v3_delete_mem_region(core->vm_info, old_reg);
+
+ apic->base_addr = src.value;
- return -1;
+ if (v3_hook_full_mem(core->vm_info, core->vcpu_id, apic->base_addr,
+ apic->base_addr + PAGE_SIZE_4KB,
+ apic_read, apic_write, apic_dev) == -1) {
+ PrintError("apic %u: core %u: Could not hook new APIC Base address\n",
+ apic->lapic_id.val, core->vcpu_id);
+
+ return -1;
+ }
+
+
+ return 0;
}
+
+
+
// irq_num is the bit offset into a 256 bit buffer...
static int activate_apic_irq(struct apic_state * apic, uint32_t irq_num) {
- int major_offset = irq_num & ~0x00000007;
- int minor_offset = irq_num & 0x00000007;
- uchar_t * req_location = apic->int_req_reg + major_offset;
- uchar_t * en_location = apic->int_en_reg + major_offset;
- uchar_t flag = 0x1 << minor_offset;
-
- if (irq_num <= 15) {
- PrintError("Attempting to raise an invalid interrupt: %d\n", irq_num);
- return -1;
- }
+ int major_offset = (irq_num & ~0x00000007) >> 3;
+ int minor_offset = irq_num & 0x00000007;
+ uint8_t * req_location = apic->int_req_reg + major_offset;
+ uint8_t * en_location = apic->int_en_reg + major_offset;
+ uint8_t flag = 0x1 << minor_offset;
- if (*en_location & flag) {
- *req_location |= flag;
- } else {
- return 0;
- }
- return 0;
+ PrintDebug("apic %u: core %d: Raising APIC IRQ %d\n", apic->lapic_id.val, apic->core->vcpu_id, irq_num);
+
+ if (*req_location & flag) {
+ PrintDebug("Interrupt %d coallescing\n", irq_num);
+ return 0;
+ }
+
+ if (*en_location & flag) {
+ *req_location |= flag;
+ return 1;
+ } else {
+ PrintDebug("apic %u: core %d: Interrupt not enabled... %.2x\n",
+ apic->lapic_id.val, apic->core->vcpu_id, *en_location);
+ }
+
+ return 0;
}
-static int activate_internal_irq(struct apic_state * apic, apic_irq_type_t int_type) {
- uint32_t vec_num = 0;
- uint32_t del_mode = 0;
- int masked = 0;
-
-
- switch (int_type) {
- case APIC_TMR_INT:
- vec_num = apic->tmr_vec_tbl.vec;
- del_mode = APIC_FIXED_DELIVERY;
- masked = apic->tmr_vec_tbl.mask;
- break;
- case APIC_THERM_INT:
- vec_num = apic->therm_loc_vec_tbl.vec;
- del_mode = apic->therm_loc_vec_tbl.msg_type;
- masked = apic->therm_loc_vec_tbl.mask;
- break;
- case APIC_PERF_INT:
- vec_num = apic->perf_ctr_loc_vec_tbl.vec;
- del_mode = apic->perf_ctr_loc_vec_tbl.msg_type;
- masked = apic->perf_ctr_loc_vec_tbl.mask;
- break;
- case APIC_LINT0_INT:
- vec_num = apic->lint0_vec_tbl.vec;
- del_mode = apic->lint0_vec_tbl.msg_type;
- masked = apic->lint0_vec_tbl.mask;
- break;
- case APIC_LINT1_INT:
- vec_num = apic->lint1_vec_tbl.vec;
- del_mode = apic->lint1_vec_tbl.msg_type;
- masked = apic->lint1_vec_tbl.mask;
- break;
- case APIC_ERR_INT:
- vec_num = apic->err_vec_tbl.vec;
- del_mode = APIC_FIXED_DELIVERY;
- masked = apic->err_vec_tbl.mask;
- break;
- default:
- PrintError("Invalid APIC interrupt type\n");
- return -1;
- }
+static int add_apic_irq_entry(struct apic_state * apic, uint8_t irq_num) {
+
+ if (irq_num <= 15) {
+ PrintError("core %d: Attempting to raise an invalid interrupt: %d\n",
+ apic->core->vcpu_id, irq_num);
+ return -1;
+ }
+
+ v3_enqueue(&(apic->irq_queue), (addr_t)irq_num);
- // interrupt is masked, don't send
- if (masked == 1) {
return 0;
- }
+}
+
+static void drain_irq_entries(struct apic_state * apic) {
+ uint32_t irq = 0;
+
+ while ((irq = (uint32_t)v3_dequeue(&(apic->irq_queue))) != 0) {
+ activate_apic_irq(apic, irq);
+ }
- if (del_mode == APIC_FIXED_DELIVERY) {
- PrintDebug("Activating internal APIC IRQ\n");
- return activate_apic_irq(apic, vec_num);
- } else {
- PrintError("Unhandled Delivery Mode\n");
- return -1;
- }
}
-static int apic_read(addr_t guest_addr, void * dst, uint_t length, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- addr_t reg_addr = guest_addr - apic->base_addr;
- struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
- uint32_t * val_ptr = (uint32_t *)dst;
- PrintDebug("Read apic address space (%p)\n",
- (void *)guest_addr);
- if (msr->apic_enable == 0) {
- PrintError("Write to APIC address space with disabled APIC\n");
- return -1;
- }
+static int get_highest_isr(struct apic_state * apic) {
+ int i = 0, j = 0;
+ // We iterate backwards to find the highest priority
+ for (i = 31; i >= 0; i--) {
+ uint8_t * svc_major = apic->int_svc_reg + i;
+
+ if ((*svc_major) & 0xff) {
+ for (j = 7; j >= 0; j--) {
+ uint8_t flag = 0x1 << j;
+ if ((*svc_major) & flag) {
+ return ((i * 8) + j);
+ }
+ }
+ }
+ }
- if (length != 4) {
- PrintError("Invalid apic readlength\n");
return -1;
- }
+}
+
+
+
+static int get_highest_irr(struct apic_state * apic) {
+ int i = 0, j = 0;
+
+ // We iterate backwards to find the highest priority
+ for (i = 31; i >= 0; i--) {
+ uint8_t * req_major = apic->int_req_reg + i;
+
+ if ((*req_major) & 0xff) {
+ for (j = 7; j >= 0; j--) {
+ uint8_t flag = 0x1 << j;
+ if ((*req_major) & flag) {
+ return ((i * 8) + j);
+ }
+ }
+ }
+ }
- switch (reg_addr) {
- case EOI_OFFSET:
- PrintError("Attempting to read from write only register\n");
return -1;
- break;
-
- // data registers
- case APIC_ID_OFFSET:
- *val_ptr = apic->lapic_id.val;
- break;
- case APIC_VERSION_OFFSET:
- *val_ptr = apic->apic_ver.val;
- break;
- case TPR_OFFSET:
- *val_ptr = apic->task_prio.val;
- break;
- case APR_OFFSET:
- *val_ptr = apic->arb_prio.val;
- break;
- case PPR_OFFSET:
- *val_ptr = apic->proc_prio.val;
- break;
- case REMOTE_READ_OFFSET:
- *val_ptr = apic->rem_rd_data;
- break;
- case LDR_OFFSET:
- *val_ptr = apic->log_dst.val;
- break;
- case DFR_OFFSET:
- *val_ptr = apic->dst_fmt.val;
- break;
- case SPURIOUS_INT_VEC_OFFSET:
- *val_ptr = apic->spurious_int.val;
- break;
- case ESR_OFFSET:
- *val_ptr = apic->err_status.val;
- break;
- case TMR_LOC_VEC_TBL_OFFSET:
- *val_ptr = apic->tmr_vec_tbl.val;
- break;
- case LINT0_VEC_TBL_OFFSET:
- *val_ptr = apic->lint0_vec_tbl.val;
- break;
- case LINT1_VEC_TBL_OFFSET:
- *val_ptr = apic->lint1_vec_tbl.val;
- break;
- case ERR_VEC_TBL_OFFSET:
- *val_ptr = apic->err_vec_tbl.val;
- break;
- case TMR_INIT_CNT_OFFSET:
- *val_ptr = apic->tmr_init_cnt;
- break;
- case TMR_DIV_CFG_OFFSET:
- *val_ptr = apic->tmr_div_cfg.val;
- break;
-
- case IER_OFFSET0:
- *val_ptr = *(uint32_t *)(apic->int_en_reg);
- break;
- case IER_OFFSET1:
- *val_ptr = *(uint32_t *)(apic->int_en_reg + 4);
- break;
- case IER_OFFSET2:
- *val_ptr = *(uint32_t *)(apic->int_en_reg + 8);
- break;
- case IER_OFFSET3:
- *val_ptr = *(uint32_t *)(apic->int_en_reg + 12);
- break;
- case IER_OFFSET4:
- *val_ptr = *(uint32_t *)(apic->int_en_reg + 16);
- break;
- case IER_OFFSET5:
- *val_ptr = *(uint32_t *)(apic->int_en_reg + 20);
- break;
- case IER_OFFSET6:
- *val_ptr = *(uint32_t *)(apic->int_en_reg + 24);
- break;
- case IER_OFFSET7:
- *val_ptr = *(uint32_t *)(apic->int_en_reg + 28);
- break;
-
- case ISR_OFFSET0:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg);
- break;
- case ISR_OFFSET1:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg + 4);
- break;
- case ISR_OFFSET2:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg + 8);
- break;
- case ISR_OFFSET3:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg + 12);
- break;
- case ISR_OFFSET4:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg + 16);
- break;
- case ISR_OFFSET5:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg + 20);
- break;
- case ISR_OFFSET6:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg + 24);
- break;
- case ISR_OFFSET7:
- *val_ptr = *(uint32_t *)(apic->int_svc_reg + 28);
- break;
-
- case TRIG_OFFSET0:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg);
- break;
- case TRIG_OFFSET1:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg + 4);
- break;
- case TRIG_OFFSET2:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg + 8);
- break;
- case TRIG_OFFSET3:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg + 12);
- break;
- case TRIG_OFFSET4:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg + 16);
- break;
- case TRIG_OFFSET5:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg + 20);
- break;
- case TRIG_OFFSET6:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg + 24);
- break;
- case TRIG_OFFSET7:
- *val_ptr = *(uint32_t *)(apic->trig_mode_reg + 28);
- break;
-
- case IRR_OFFSET0:
- *val_ptr = *(uint32_t *)(apic->int_req_reg);
- break;
- case IRR_OFFSET1:
- *val_ptr = *(uint32_t *)(apic->int_req_reg + 4);
- break;
- case IRR_OFFSET2:
- *val_ptr = *(uint32_t *)(apic->int_req_reg + 8);
- break;
- case IRR_OFFSET3:
- *val_ptr = *(uint32_t *)(apic->int_req_reg + 12);
- break;
- case IRR_OFFSET4:
- *val_ptr = *(uint32_t *)(apic->int_req_reg + 16);
- break;
- case IRR_OFFSET5:
- *val_ptr = *(uint32_t *)(apic->int_req_reg + 20);
- break;
- case IRR_OFFSET6:
- *val_ptr = *(uint32_t *)(apic->int_req_reg + 24);
- break;
- case IRR_OFFSET7:
- *val_ptr = *(uint32_t *)(apic->int_req_reg + 28);
- break;
- case TMR_CUR_CNT_OFFSET:
- *val_ptr = apic->tmr_cur_cnt;
- break;
-
- // We are not going to implement these....
- case THERM_LOC_VEC_TBL_OFFSET:
- *val_ptr = apic->therm_loc_vec_tbl.val;
- break;
- case PERF_CTR_LOC_VEC_TBL_OFFSET:
- *val_ptr = apic->perf_ctr_loc_vec_tbl.val;
- break;
+}
+
+
+
+
+static int apic_do_eoi(struct apic_state * apic) {
+ int isr_irq = get_highest_isr(apic);
+
+ if (isr_irq != -1) {
+ int major_offset = (isr_irq & ~0x00000007) >> 3;
+ int minor_offset = isr_irq & 0x00000007;
+ uint8_t flag = 0x1 << minor_offset;
+ uint8_t * svc_location = apic->int_svc_reg + major_offset;
+
+ PrintDebug("apic %u: core ?: Received APIC EOI for IRQ %d\n", apic->lapic_id.val,isr_irq);
+
+ *svc_location &= ~flag;
+#ifdef V3_CONFIG_CRAY_XT
+
+ if ((isr_irq == 238) ||
+ (isr_irq == 239)) {
+ PrintDebug("apic %u: core ?: Acking IRQ %d\n", apic->lapic_id.val,isr_irq);
+ }
+
+ if (isr_irq == 238) {
+ V3_ACK_IRQ(238);
+ }
+#endif
+ } else {
+ //PrintError("apic %u: core ?: Spurious EOI...\n",apic->lapic_id.val);
+ }
+
+ return 0;
+}
- // handled registers
- case INT_CMD_LO_OFFSET:
- *val_ptr = apic->int_cmd.lo;
- break;
- case INT_CMD_HI_OFFSET:
- *val_ptr = apic->int_cmd.hi;
- break;
-
- // handle current timer count
-
- // Unhandled Registers
- case EXT_INT_LOC_VEC_TBL_OFFSET0:
- case EXT_INT_LOC_VEC_TBL_OFFSET1:
- case EXT_INT_LOC_VEC_TBL_OFFSET2:
- case EXT_INT_LOC_VEC_TBL_OFFSET3:
- case EXT_APIC_FEATURE_OFFSET:
- case EXT_APIC_CMD_OFFSET:
- case SEOI_OFFSET:
-
- default:
- PrintError("Read from Unhandled APIC Register: %x\n", (uint32_t)reg_addr);
- return -1;
- }
+static int activate_internal_irq(struct apic_state * apic, apic_irq_type_t int_type) {
+ uint32_t vec_num = 0;
+ uint32_t del_mode = 0;
+ int masked = 0;
+
+
+ switch (int_type) {
+ case APIC_TMR_INT:
+ vec_num = apic->tmr_vec_tbl.vec;
+ del_mode = APIC_FIXED_DELIVERY;
+ masked = apic->tmr_vec_tbl.mask;
+ break;
+ case APIC_THERM_INT:
+ vec_num = apic->therm_loc_vec_tbl.vec;
+ del_mode = apic->therm_loc_vec_tbl.msg_type;
+ masked = apic->therm_loc_vec_tbl.mask;
+ break;
+ case APIC_PERF_INT:
+ vec_num = apic->perf_ctr_loc_vec_tbl.vec;
+ del_mode = apic->perf_ctr_loc_vec_tbl.msg_type;
+ masked = apic->perf_ctr_loc_vec_tbl.mask;
+ break;
+ case APIC_LINT0_INT:
+ vec_num = apic->lint0_vec_tbl.vec;
+ del_mode = apic->lint0_vec_tbl.msg_type;
+ masked = apic->lint0_vec_tbl.mask;
+ break;
+ case APIC_LINT1_INT:
+ vec_num = apic->lint1_vec_tbl.vec;
+ del_mode = apic->lint1_vec_tbl.msg_type;
+ masked = apic->lint1_vec_tbl.mask;
+ break;
+ case APIC_ERR_INT:
+ vec_num = apic->err_vec_tbl.vec;
+ del_mode = APIC_FIXED_DELIVERY;
+ masked = apic->err_vec_tbl.mask;
+ break;
+ default:
+ PrintError("apic %u: core ?: Invalid APIC interrupt type\n", apic->lapic_id.val);
+ return -1;
+ }
- PrintDebug("Read finished (val=%x)\n", *(uint32_t *)dst);
+ // interrupt is masked, don't send
+ if (masked == 1) {
+ PrintDebug("apic %u: core ?: Inerrupt is masked\n", apic->lapic_id.val);
+ return 0;
+ }
- return length;
+ if (del_mode == APIC_FIXED_DELIVERY) {
+ //PrintDebug("Activating internal APIC IRQ %d\n", vec_num);
+ return add_apic_irq_entry(apic, vec_num);
+ } else {
+ PrintError("apic %u: core ?: Unhandled Delivery Mode\n", apic->lapic_id.val);
+ return -1;
+ }
}
-static int apic_write(addr_t guest_addr, void * src, uint_t length, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- addr_t reg_addr = guest_addr - apic->base_addr;
- struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
- uint32_t op_val = *(uint32_t *)src;
- PrintDebug("Write to apic address space (%p) (val=%x)\n",
- (void *)guest_addr, *(uint32_t *)src);
+static inline int should_deliver_cluster_ipi(struct apic_dev_state * apic_dev,
+ struct guest_info * dst_core,
+ struct apic_state * dst_apic, uint8_t mda) {
- if (msr->apic_enable == 0) {
- PrintError("Write to APIC address space with disabled APIC\n");
- return -1;
- }
+ int ret = 0;
- if (length != 4) {
- PrintError("Invalid apic write length\n");
- return -1;
- }
-
- switch (reg_addr) {
- case REMOTE_READ_OFFSET:
- case APIC_VERSION_OFFSET:
- case APR_OFFSET:
- case IRR_OFFSET0:
- case IRR_OFFSET1:
- case IRR_OFFSET2:
- case IRR_OFFSET3:
- case IRR_OFFSET4:
- case IRR_OFFSET5:
- case IRR_OFFSET6:
- case IRR_OFFSET7:
- case ISR_OFFSET0:
- case ISR_OFFSET1:
- case ISR_OFFSET2:
- case ISR_OFFSET3:
- case ISR_OFFSET4:
- case ISR_OFFSET5:
- case ISR_OFFSET6:
- case ISR_OFFSET7:
- case TRIG_OFFSET0:
- case TRIG_OFFSET1:
- case TRIG_OFFSET2:
- case TRIG_OFFSET3:
- case TRIG_OFFSET4:
- case TRIG_OFFSET5:
- case TRIG_OFFSET6:
- case TRIG_OFFSET7:
- case PPR_OFFSET:
- case EXT_APIC_FEATURE_OFFSET:
- PrintError("Attempting to write to read only register\n");
- return -1;
- break;
-
- // Data registers
- case APIC_ID_OFFSET:
- apic->lapic_id.val = op_val;
- break;
- case TPR_OFFSET:
- apic->task_prio.val = op_val;
- break;
- case LDR_OFFSET:
- apic->log_dst.val = op_val;
- break;
- case DFR_OFFSET:
- apic->dst_fmt.val = op_val;
- break;
- case SPURIOUS_INT_VEC_OFFSET:
- apic->spurious_int.val = op_val;
- break;
- case ESR_OFFSET:
- apic->err_status.val = op_val;
- break;
- case TMR_LOC_VEC_TBL_OFFSET:
- apic->tmr_vec_tbl.val = op_val;
- break;
- case THERM_LOC_VEC_TBL_OFFSET:
- apic->therm_loc_vec_tbl.val = op_val;
- break;
- case PERF_CTR_LOC_VEC_TBL_OFFSET:
- apic->perf_ctr_loc_vec_tbl.val = op_val;
- break;
- case LINT0_VEC_TBL_OFFSET:
- apic->lint0_vec_tbl.val = op_val;
- break;
- case LINT1_VEC_TBL_OFFSET:
- apic->lint1_vec_tbl.val = op_val;
- break;
- case ERR_VEC_TBL_OFFSET:
- apic->err_vec_tbl.val = op_val;
- break;
- case TMR_INIT_CNT_OFFSET:
- apic->tmr_init_cnt = op_val;
- apic->tmr_cur_cnt = op_val;
- break;
- case TMR_CUR_CNT_OFFSET:
- apic->tmr_cur_cnt = op_val;
- break;
- case TMR_DIV_CFG_OFFSET:
- apic->tmr_div_cfg.val = op_val;
- break;
-
-
- // Enable mask (256 bits)
- case IER_OFFSET0:
- *(uint32_t *)(apic->int_en_reg) = op_val;
- break;
- case IER_OFFSET1:
- *(uint32_t *)(apic->int_en_reg + 4) = op_val;
- break;
- case IER_OFFSET2:
- *(uint32_t *)(apic->int_en_reg + 8) = op_val;
- break;
- case IER_OFFSET3:
- *(uint32_t *)(apic->int_en_reg + 12) = op_val;
- break;
- case IER_OFFSET4:
- *(uint32_t *)(apic->int_en_reg + 16) = op_val;
- break;
- case IER_OFFSET5:
- *(uint32_t *)(apic->int_en_reg + 20) = op_val;
- break;
- case IER_OFFSET6:
- *(uint32_t *)(apic->int_en_reg + 24) = op_val;
- break;
- case IER_OFFSET7:
- *(uint32_t *)(apic->int_en_reg + 28) = op_val;
- break;
-
+ if ( ((mda & 0xf0) == (dst_apic->log_dst.dst_log_id & 0xf0)) && /* (I am in the cluster and */
+ ((mda & 0x0f) & (dst_apic->log_dst.dst_log_id & 0x0f)) ) { /* I am in the set) */
+ ret = 1;
+ } else {
+ ret = 0;
+ }
- // Action Registers
- case INT_CMD_LO_OFFSET:
- case INT_CMD_HI_OFFSET:
- case EOI_OFFSET:
- // do eoi
-
- // Unhandled Registers
- case EXT_INT_LOC_VEC_TBL_OFFSET0:
- case EXT_INT_LOC_VEC_TBL_OFFSET1:
- case EXT_INT_LOC_VEC_TBL_OFFSET2:
- case EXT_INT_LOC_VEC_TBL_OFFSET3:
- case EXT_APIC_CMD_OFFSET:
- case SEOI_OFFSET:
- default:
- PrintError("Write to Unhandled APIC Register: %x\n", (uint32_t)reg_addr);
- return -1;
- }
- PrintDebug("Write finished\n");
+ if (ret == 1) {
+ PrintDebug("apic %u core %u: accepting clustered IRQ (mda 0x%x == log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->vcpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
+ } else {
+ PrintDebug("apic %u core %u: rejecting clustered IRQ (mda 0x%x != log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->vcpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
+ }
+
+ return ret;
- return length;
}
+static inline int should_deliver_flat_ipi(struct apic_dev_state * apic_dev,
+ struct guest_info * dst_core,
+ struct apic_state * dst_apic, uint8_t mda) {
+ int ret = 0;
-/* Interrupt Controller Functions */
-static int apic_intr_pending(void * private_data) {
- struct vm_device * dev = (struct vm_device *)private_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- int i = 0;
+ if ((dst_apic->log_dst.dst_log_id & mda) != 0) { // I am in the set
+ ret = 1;
+ } else {
+ ret = 0;
+ }
+
- // just scan the request register looking for any set bit
- // we should probably just do this with uint64 casts
- for (i = 0; i < 32; i++) {
- if (apic->int_req_reg[i] & 0xff) {
- return 1;
+ if (ret == 1) {
+ PrintDebug("apic %u core %u: accepting flat IRQ (mda 0x%x == log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->vcpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
+ } else {
+ PrintDebug("apic %u core %u: rejecting flat IRQ (mda 0x%x != log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->vcpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
}
- }
- return 0;
+
+ return ret;
}
-static int apic_get_intr_number(void * private_data) {
- struct vm_device * dev = (struct vm_device *)private_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- int i = 0, j = 0;
- // We iterate backwards to find the highest priority
- for (i = 31; i >= 0; i--) {
- uchar_t req_major = apic->int_req_reg[i];
+static int should_deliver_ipi(struct apic_dev_state * apic_dev,
+ struct guest_info * dst_core,
+ struct apic_state * dst_apic, uint8_t mda) {
+ addr_t flags = 0;
+ int ret = 0;
+
+ flags = v3_lock_irqsave(apic_dev->state_lock);
+
+ if (dst_apic->dst_fmt.model == 0xf) {
+
+ if (mda == 0xff) {
+ /* always deliver broadcast */
+ ret = 1;
+ } else {
+ ret = should_deliver_flat_ipi(apic_dev, dst_core, dst_apic, mda);
+ }
+ } else if (dst_apic->dst_fmt.model == 0x0) {
+
+ if (mda == 0xff) {
+ /* always deliver broadcast */
+ ret = 1;
+ } else {
+ ret = should_deliver_cluster_ipi(apic_dev, dst_core, dst_apic, mda);
+ }
+
+ } else {
+ ret = -1;
+ }
- if (req_major & 0xff) {
- for (j = 7; j >= 0; j--) {
- if ((req_major >> j) == 0x1) {
- return (i * 32) + j;
+ v3_unlock_irqrestore(apic_dev->state_lock, flags);
+
+
+ if (ret == -1) {
+ PrintError("apic %u core %u: invalid destination format register value 0x%x for logical mode delivery.\n",
+ dst_apic->lapic_id.val, dst_core->vcpu_id, dst_apic->dst_fmt.model);
+ }
+
+ return ret;
+}
+
+
+
+
+// Only the src_apic pointer is used
+static int deliver_ipi(struct apic_state * src_apic,
+ struct apic_state * dst_apic,
+ uint32_t vector, uint8_t del_mode) {
+
+
+ struct guest_info * dst_core = dst_apic->core;
+
+
+ switch (del_mode) {
+
+ case APIC_FIXED_DELIVERY:
+ case APIC_LOWEST_DELIVERY: {
+ // lowest priority -
+ // caller needs to have decided which apic to deliver to!
+
+ PrintDebug("delivering IRQ %d to core %u\n", vector, dst_core->vcpu_id);
+
+ add_apic_irq_entry(dst_apic, vector);
+
+#ifdef V3_CONFIG_MULTITHREAD_OS
+ if (dst_apic != src_apic) {
+ PrintDebug(" non-local core with new interrupt, forcing it to exit now\n");
+ v3_interrupt_cpu(dst_core->vm_info, dst_core->pcpu_id, 0);
+ }
+#endif
+
+
+ break;
}
- }
+ case APIC_INIT_DELIVERY: {
+
+ PrintDebug(" INIT delivery to core %u\n", dst_core->vcpu_id);
+
+ // TODO: any APIC reset on dest core (shouldn't be needed, but not sure...)
+
+ // Sanity check
+ if (dst_apic->ipi_state != INIT_ST) {
+ PrintError(" Warning: core %u is not in INIT state (mode = %d), ignored (assuming this is the deassert)\n",
+ dst_core->vcpu_id, dst_apic->ipi_state);
+ // Only a warning, since INIT INIT SIPI is common
+ break;
+ }
+
+ // We transition the target core to SIPI state
+ dst_apic->ipi_state = SIPI; // note: locking should not be needed here
+
+ // That should be it since the target core should be
+ // waiting in host on this transition
+ // either it's on another core or on a different preemptive thread
+ // in both cases, it will quickly notice this transition
+ // in particular, we should not need to force an exit here
+
+ PrintDebug(" INIT delivery done\n");
+
+ break;
+ }
+ case APIC_SIPI_DELIVERY: {
+
+ // Sanity check
+ if (dst_apic->ipi_state != SIPI) {
+ PrintError(" core %u is not in SIPI state (mode = %d), ignored!\n",
+ dst_core->vcpu_id, dst_apic->ipi_state);
+ break;
+ }
+
+ v3_reset_vm_core(dst_core, vector);
+
+ PrintDebug(" SIPI delivery (0x%x -> 0x%x:0x0) to core %u\n",
+ vector, dst_core->segments.cs.selector, dst_core->vcpu_id);
+ // Maybe need to adjust the APIC?
+
+ // We transition the target core to SIPI state
+ dst_core->core_run_state = CORE_RUNNING; // note: locking should not be needed here
+ dst_apic->ipi_state = STARTED;
+
+ // As with INIT, we should not need to do anything else
+
+ PrintDebug(" SIPI delivery done\n");
+
+ break;
+ }
+
+ case APIC_EXTINT_DELIVERY: // EXTINT
+ /* Two possible things to do here:
+ * 1. Ignore the IPI and assume the 8259a (PIC) will handle it
+ * 2. Add 32 to the vector and inject it...
+ * We probably just want to do 1 here, and assume the raise_irq() will hit the 8259a.
+ */
+ return 0;
+
+ case APIC_SMI_DELIVERY:
+ case APIC_RES1_DELIVERY: // reserved
+ case APIC_NMI_DELIVERY:
+ default:
+ PrintError("IPI %d delivery is unsupported\n", del_mode);
+ return -1;
}
- }
+
+ return 0;
+
+}
+
+static struct apic_state * find_physical_apic(struct apic_dev_state * apic_dev, uint32_t dst_idx) {
+ struct apic_state * dst_apic = NULL;
+ addr_t flags;
+ int i;
+
+ flags = v3_lock_irqsave(apic_dev->state_lock);
+
+ if ( (dst_idx > 0) && (dst_idx < apic_dev->num_apics) ) {
+ // see if it simply is the core id
+ if (apic_dev->apics[dst_idx].lapic_id.val == dst_idx) {
+ dst_apic = &(apic_dev->apics[dst_idx]);
+ }
+ }
+
+ for (i = 0; i < apic_dev->num_apics; i++) {
+ if (apic_dev->apics[i].lapic_id.val == dst_idx) {
+ dst_apic = &(apic_dev->apics[i]);
+ }
+ }
+
+ v3_unlock_irqrestore(apic_dev->state_lock, flags);
+
+ return dst_apic;
+
+}
+
+
+static int route_ipi(struct apic_dev_state * apic_dev,
+ struct apic_state * src_apic,
+ struct int_cmd_reg * icr) {
+ struct apic_state * dest_apic = NULL;
+
+
+ PrintDebug("apic: IPI %s %u from apic %p to %s %s %u (icr=0x%llx)\n",
+ deliverymode_str[icr->del_mode],
+ icr->vec,
+ src_apic,
+ (icr->dst_mode == 0) ? "(physical)" : "(logical)",
+ shorthand_str[icr->dst_shorthand],
+ icr->dst,
+ icr->val);
+
+
+ switch (icr->dst_shorthand) {
+
+ case APIC_SHORTHAND_NONE: // no shorthand
+ if (icr->dst_mode == APIC_DEST_PHYSICAL) {
+
+ dest_apic = find_physical_apic(apic_dev, icr->dst);
+
+ if (dest_apic == NULL) {
+ PrintError("apic: Attempted send to unregistered apic id=%u\n", icr->dst);
+ return -1;
+ }
+
+ if (deliver_ipi(src_apic, dest_apic,
+ icr->vec, icr->del_mode) == -1) {
+ PrintError("apic: Could not deliver IPI\n");
+ return -1;
+ }
+
+
+ PrintDebug("apic: done\n");
+
+ } else if (icr->dst_mode == APIC_DEST_LOGICAL) {
+
+ if (icr->del_mode != APIC_LOWEST_DELIVERY) {
+ int i;
+ uint8_t mda = icr->dst;
+
+ // logical, but not lowest priority
+ // we immediately trigger
+ // fixed, smi, reserved, nmi, init, sipi, etc
+
+
+ for (i = 0; i < apic_dev->num_apics; i++) {
+ int del_flag = 0;
+
+ dest_apic = &(apic_dev->apics[i]);
+
+ del_flag = should_deliver_ipi(apic_dev, dest_apic->core, dest_apic, mda);
+
+ if (del_flag == -1) {
+
+ PrintError("apic: Error checking delivery mode\n");
+ return -1;
+ } else if (del_flag == 1) {
+
+ if (deliver_ipi(src_apic, dest_apic,
+ icr->vec, icr->del_mode) == -1) {
+ PrintError("apic: Error: Could not deliver IPI\n");
+ return -1;
+ }
+ }
+ }
+ } else { // APIC_LOWEST_DELIVERY
+ struct apic_state * cur_best_apic = NULL;
+ uint8_t mda = icr->dst;
+ int i;
+
+ // logical, lowest priority
+
+ for (i = 0; i < apic_dev->num_apics; i++) {
+ int del_flag = 0;
+
+ dest_apic = &(apic_dev->apics[i]);
+
+ del_flag = should_deliver_ipi(apic_dev, dest_apic->core, dest_apic, mda);
+
+ if (del_flag == -1) {
+ PrintError("apic: Error checking delivery mode\n");
+
+ return -1;
+ } else if (del_flag == 1) {
+ // update priority for lowest priority scan
+ addr_t flags = 0;
+
+ flags = v3_lock_irqsave(apic_dev->state_lock);
+
+ if (cur_best_apic == 0) {
+ cur_best_apic = dest_apic;
+ } else if (dest_apic->task_prio.val < cur_best_apic->task_prio.val) {
+ cur_best_apic = dest_apic;
+ }
+
+ v3_unlock_irqrestore(apic_dev->state_lock, flags);
+
+ }
+ }
+
+ // now we will deliver to the best one if it exists
+ if (!cur_best_apic) {
+ PrintDebug("apic: lowest priority deliver, but no destinations!\n");
+ } else {
+ if (deliver_ipi(src_apic, cur_best_apic,
+ icr->vec, icr->del_mode) == -1) {
+ PrintError("apic: Error: Could not deliver IPI\n");
+ return -1;
+ }
+ //V3_Print("apic: logical, lowest priority delivery to apic %u\n",cur_best_apic->lapic_id.val);
+ }
+ }
+ }
+
+ break;
+
+ case APIC_SHORTHAND_SELF: // self
+
+ if (src_apic == NULL) { /* this is not an apic, but it's trying to send to itself??? */
+ PrintError("apic: Sending IPI to self from generic IPI sender\n");
+ break;
+ }
+
+
+
+ if (icr->dst_mode == APIC_DEST_PHYSICAL) { /* physical delivery */
+ if (deliver_ipi(src_apic, src_apic, icr->vec, icr->del_mode) == -1) {
+ PrintError("apic: Could not deliver IPI to self (physical)\n");
+ return -1;
+ }
+ } else if (icr->dst_mode == APIC_DEST_LOGICAL) { /* logical delivery */
+ PrintError("apic: use of logical delivery in self (untested)\n");
+
+ if (deliver_ipi(src_apic, src_apic, icr->vec, icr->del_mode) == -1) {
+ PrintError("apic: Could not deliver IPI to self (logical)\n");
+ return -1;
+ }
+ }
+
+ break;
+
+ case APIC_SHORTHAND_ALL:
+ case APIC_SHORTHAND_ALL_BUT_ME: { /* all and all-but-me */
+ /* assuming that logical verus physical doesn't matter
+ although it is odd that both are used */
+ int i;
+
+ for (i = 0; i < apic_dev->num_apics; i++) {
+ dest_apic = &(apic_dev->apics[i]);
+
+ if ((dest_apic != src_apic) || (icr->dst_shorthand == APIC_SHORTHAND_ALL)) {
+ if (deliver_ipi(src_apic, dest_apic, icr->vec, icr->del_mode) == -1) {
+ PrintError("apic: Error: Could not deliver IPI\n");
+ return -1;
+ }
+ }
+ }
+
+ break;
+ }
+ default:
+ PrintError("apic: Error routing IPI, invalid Mode (%d)\n", icr->dst_shorthand);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+// External function, expected to acquire lock on apic
+static int apic_read(struct guest_info * core, addr_t guest_addr, void * dst, uint_t length, void * priv_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+ addr_t reg_addr = guest_addr - apic->base_addr;
+ struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
+ uint32_t val = 0;
+
+
+ PrintDebug("apic %u: core %u: at %p: Read apic address space (%p)\n",
+ apic->lapic_id.val, core->vcpu_id, apic, (void *)guest_addr);
+
+ if (msr->apic_enable == 0) {
+ PrintError("apic %u: core %u: Read from APIC address space with disabled APIC, apic msr=0x%llx\n",
+ apic->lapic_id.val, core->vcpu_id, apic->base_addr_msr.value);
+ return -1;
+ }
+
+
+ /* Because "May not be supported" doesn't matter to Linux developers... */
+ /* if (length != 4) { */
+ /* PrintError("Invalid apic read length (%d)\n", length); */
+ /* return -1; */
+ /* } */
+
+ switch (reg_addr & ~0x3) {
+ case EOI_OFFSET:
+ // Well, only an idiot would read from a architectural write only register
+ // Oh, Hello Linux.
+ // PrintError("Attempting to read from write only register\n");
+ // return -1;
+ break;
+
+ // data registers
+ case APIC_ID_OFFSET:
+ val = apic->lapic_id.val;
+ break;
+ case APIC_VERSION_OFFSET:
+ val = apic->apic_ver.val;
+ break;
+ case TPR_OFFSET:
+ val = apic->task_prio.val;
+ break;
+ case APR_OFFSET:
+ val = apic->arb_prio.val;
+ break;
+ case PPR_OFFSET:
+ val = apic->proc_prio.val;
+ break;
+ case REMOTE_READ_OFFSET:
+ val = apic->rem_rd_data;
+ break;
+ case LDR_OFFSET:
+ val = apic->log_dst.val;
+ break;
+ case DFR_OFFSET:
+ val = apic->dst_fmt.val;
+ break;
+ case SPURIOUS_INT_VEC_OFFSET:
+ val = apic->spurious_int.val;
+ break;
+ case ESR_OFFSET:
+ val = apic->err_status.val;
+ break;
+ case TMR_LOC_VEC_TBL_OFFSET:
+ val = apic->tmr_vec_tbl.val;
+ break;
+ case LINT0_VEC_TBL_OFFSET:
+ val = apic->lint0_vec_tbl.val;
+ break;
+ case LINT1_VEC_TBL_OFFSET:
+ val = apic->lint1_vec_tbl.val;
+ break;
+ case ERR_VEC_TBL_OFFSET:
+ val = apic->err_vec_tbl.val;
+ break;
+ case TMR_INIT_CNT_OFFSET:
+ val = apic->tmr_init_cnt;
+ break;
+ case TMR_DIV_CFG_OFFSET:
+ val = apic->tmr_div_cfg.val;
+ break;
+
+ case IER_OFFSET0:
+ val = *(uint32_t *)(apic->int_en_reg);
+ break;
+ case IER_OFFSET1:
+ val = *(uint32_t *)(apic->int_en_reg + 4);
+ break;
+ case IER_OFFSET2:
+ val = *(uint32_t *)(apic->int_en_reg + 8);
+ break;
+ case IER_OFFSET3:
+ val = *(uint32_t *)(apic->int_en_reg + 12);
+ break;
+ case IER_OFFSET4:
+ val = *(uint32_t *)(apic->int_en_reg + 16);
+ break;
+ case IER_OFFSET5:
+ val = *(uint32_t *)(apic->int_en_reg + 20);
+ break;
+ case IER_OFFSET6:
+ val = *(uint32_t *)(apic->int_en_reg + 24);
+ break;
+ case IER_OFFSET7:
+ val = *(uint32_t *)(apic->int_en_reg + 28);
+ break;
+
+ case ISR_OFFSET0:
+ val = *(uint32_t *)(apic->int_svc_reg);
+ break;
+ case ISR_OFFSET1:
+ val = *(uint32_t *)(apic->int_svc_reg + 4);
+ break;
+ case ISR_OFFSET2:
+ val = *(uint32_t *)(apic->int_svc_reg + 8);
+ break;
+ case ISR_OFFSET3:
+ val = *(uint32_t *)(apic->int_svc_reg + 12);
+ break;
+ case ISR_OFFSET4:
+ val = *(uint32_t *)(apic->int_svc_reg + 16);
+ break;
+ case ISR_OFFSET5:
+ val = *(uint32_t *)(apic->int_svc_reg + 20);
+ break;
+ case ISR_OFFSET6:
+ val = *(uint32_t *)(apic->int_svc_reg + 24);
+ break;
+ case ISR_OFFSET7:
+ val = *(uint32_t *)(apic->int_svc_reg + 28);
+ break;
+
+ case TRIG_OFFSET0:
+ val = *(uint32_t *)(apic->trig_mode_reg);
+ break;
+ case TRIG_OFFSET1:
+ val = *(uint32_t *)(apic->trig_mode_reg + 4);
+ break;
+ case TRIG_OFFSET2:
+ val = *(uint32_t *)(apic->trig_mode_reg + 8);
+ break;
+ case TRIG_OFFSET3:
+ val = *(uint32_t *)(apic->trig_mode_reg + 12);
+ break;
+ case TRIG_OFFSET4:
+ val = *(uint32_t *)(apic->trig_mode_reg + 16);
+ break;
+ case TRIG_OFFSET5:
+ val = *(uint32_t *)(apic->trig_mode_reg + 20);
+ break;
+ case TRIG_OFFSET6:
+ val = *(uint32_t *)(apic->trig_mode_reg + 24);
+ break;
+ case TRIG_OFFSET7:
+ val = *(uint32_t *)(apic->trig_mode_reg + 28);
+ break;
+
+ case IRR_OFFSET0:
+ val = *(uint32_t *)(apic->int_req_reg);
+ break;
+ case IRR_OFFSET1:
+ val = *(uint32_t *)(apic->int_req_reg + 4);
+ break;
+ case IRR_OFFSET2:
+ val = *(uint32_t *)(apic->int_req_reg + 8);
+ break;
+ case IRR_OFFSET3:
+ val = *(uint32_t *)(apic->int_req_reg + 12);
+ break;
+ case IRR_OFFSET4:
+ val = *(uint32_t *)(apic->int_req_reg + 16);
+ break;
+ case IRR_OFFSET5:
+ val = *(uint32_t *)(apic->int_req_reg + 20);
+ break;
+ case IRR_OFFSET6:
+ val = *(uint32_t *)(apic->int_req_reg + 24);
+ break;
+ case IRR_OFFSET7:
+ val = *(uint32_t *)(apic->int_req_reg + 28);
+ break;
+ case TMR_CUR_CNT_OFFSET:
+ val = apic->tmr_cur_cnt;
+ break;
+
+ // We are not going to implement these....
+ case THERM_LOC_VEC_TBL_OFFSET:
+ val = apic->therm_loc_vec_tbl.val;
+ break;
+ case PERF_CTR_LOC_VEC_TBL_OFFSET:
+ val = apic->perf_ctr_loc_vec_tbl.val;
+ break;
+
+
+
+ // handled registers
+ case INT_CMD_LO_OFFSET:
+ val = apic->int_cmd.lo;
+ break;
+ case INT_CMD_HI_OFFSET:
+ val = apic->int_cmd.hi;
+ break;
+
+ // handle current timer count
+
+ // Unhandled Registers
+ case EXT_INT_LOC_VEC_TBL_OFFSET0:
+ val = apic->ext_intr_vec_tbl[0].val;
+ break;
+ case EXT_INT_LOC_VEC_TBL_OFFSET1:
+ val = apic->ext_intr_vec_tbl[1].val;
+ break;
+ case EXT_INT_LOC_VEC_TBL_OFFSET2:
+ val = apic->ext_intr_vec_tbl[2].val;
+ break;
+ case EXT_INT_LOC_VEC_TBL_OFFSET3:
+ val = apic->ext_intr_vec_tbl[3].val;
+ break;
+
+
+ case EXT_APIC_FEATURE_OFFSET:
+ case EXT_APIC_CMD_OFFSET:
+ case SEOI_OFFSET:
+
+ default:
+ PrintError("apic %u: core %u: Read from Unhandled APIC Register: %x (getting zero)\n",
+ apic->lapic_id.val, core->vcpu_id, (uint32_t)reg_addr);
+ return -1;
+ }
+
+
+ if (length == 1) {
+ uint_t byte_addr = reg_addr & 0x3;
+ uint8_t * val_ptr = (uint8_t *)dst;
+
+ *val_ptr = *(((uint8_t *)&val) + byte_addr);
+
+ } else if ((length == 2) &&
+ ((reg_addr & 0x3) != 0x3)) {
+ uint_t byte_addr = reg_addr & 0x3;
+ uint16_t * val_ptr = (uint16_t *)dst;
+ *val_ptr = *(((uint16_t *)&val) + byte_addr);
+
+ } else if (length == 4) {
+ uint32_t * val_ptr = (uint32_t *)dst;
+ *val_ptr = val;
+
+ } else {
+ PrintError("apic %u: core %u: Invalid apic read length (%d)\n",
+ apic->lapic_id.val, core->vcpu_id, length);
+ return -1;
+ }
+
+ PrintDebug("apic %u: core %u: Read finished (val=%x)\n",
+ apic->lapic_id.val, core->vcpu_id, *(uint32_t *)dst);
+
+ return length;
+}
+
+
+/**
+ *
+ */
+static int apic_write(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+ addr_t reg_addr = guest_addr - apic->base_addr;
+ struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
+ uint32_t op_val = *(uint32_t *)src;
+ addr_t flags = 0;
+
+ PrintDebug("apic %u: core %u: at %p and priv_data is at %p\n",
+ apic->lapic_id.val, core->vcpu_id, apic, priv_data);
+
+ PrintDebug("apic %u: core %u: write to address space (%p) (val=%x)\n",
+ apic->lapic_id.val, core->vcpu_id, (void *)guest_addr, *(uint32_t *)src);
+
+ if (msr->apic_enable == 0) {
+ PrintError("apic %u: core %u: Write to APIC address space with disabled APIC, apic msr=0x%llx\n",
+ apic->lapic_id.val, core->vcpu_id, apic->base_addr_msr.value);
+ return -1;
+ }
+
+
+ if (length != 4) {
+ PrintError("apic %u: core %u: Invalid apic write length (%d)\n",
+ apic->lapic_id.val, length, core->vcpu_id);
+ return -1;
+ }
+
+ switch (reg_addr) {
+ case REMOTE_READ_OFFSET:
+ case APIC_VERSION_OFFSET:
+ case APR_OFFSET:
+ case IRR_OFFSET0:
+ case IRR_OFFSET1:
+ case IRR_OFFSET2:
+ case IRR_OFFSET3:
+ case IRR_OFFSET4:
+ case IRR_OFFSET5:
+ case IRR_OFFSET6:
+ case IRR_OFFSET7:
+ case ISR_OFFSET0:
+ case ISR_OFFSET1:
+ case ISR_OFFSET2:
+ case ISR_OFFSET3:
+ case ISR_OFFSET4:
+ case ISR_OFFSET5:
+ case ISR_OFFSET6:
+ case ISR_OFFSET7:
+ case TRIG_OFFSET0:
+ case TRIG_OFFSET1:
+ case TRIG_OFFSET2:
+ case TRIG_OFFSET3:
+ case TRIG_OFFSET4:
+ case TRIG_OFFSET5:
+ case TRIG_OFFSET6:
+ case TRIG_OFFSET7:
+ case PPR_OFFSET:
+ case EXT_APIC_FEATURE_OFFSET:
+
+ PrintError("apic %u: core %u: Attempting to write to read only register %p (error)\n",
+ apic->lapic_id.val, core->vcpu_id, (void *)reg_addr);
+
+ break;
+
+ // Data registers
+ case APIC_ID_OFFSET:
+ //V3_Print("apic %u: core %u: my id is being changed to %u\n",
+ // apic->lapic_id.val, core->vcpu_id, op_val);
+
+ apic->lapic_id.val = op_val;
+ break;
+ case TPR_OFFSET:
+ apic->task_prio.val = op_val;
+ break;
+ case LDR_OFFSET:
+ PrintDebug("apic %u: core %u: setting log_dst.val to 0x%x\n",
+ apic->lapic_id.val, core->vcpu_id, op_val);
+ flags = v3_lock_irqsave(apic_dev->state_lock);
+ apic->log_dst.val = op_val;
+ v3_unlock_irqrestore(apic_dev->state_lock, flags);
+ break;
+ case DFR_OFFSET:
+ flags = v3_lock_irqsave(apic_dev->state_lock);
+ apic->dst_fmt.val = op_val;
+ v3_unlock_irqrestore(apic_dev->state_lock, flags);
+ break;
+ case SPURIOUS_INT_VEC_OFFSET:
+ apic->spurious_int.val = op_val;
+ break;
+ case ESR_OFFSET:
+ apic->err_status.val = op_val;
+ break;
+ case TMR_LOC_VEC_TBL_OFFSET:
+ apic->tmr_vec_tbl.val = op_val;
+ break;
+ case THERM_LOC_VEC_TBL_OFFSET:
+ apic->therm_loc_vec_tbl.val = op_val;
+ break;
+ case PERF_CTR_LOC_VEC_TBL_OFFSET:
+ apic->perf_ctr_loc_vec_tbl.val = op_val;
+ break;
+ case LINT0_VEC_TBL_OFFSET:
+ apic->lint0_vec_tbl.val = op_val;
+ break;
+ case LINT1_VEC_TBL_OFFSET:
+ apic->lint1_vec_tbl.val = op_val;
+ break;
+ case ERR_VEC_TBL_OFFSET:
+ apic->err_vec_tbl.val = op_val;
+ break;
+ case TMR_INIT_CNT_OFFSET:
+ apic->tmr_init_cnt = op_val;
+ apic->tmr_cur_cnt = op_val;
+ break;
+ case TMR_CUR_CNT_OFFSET:
+ apic->tmr_cur_cnt = op_val;
+ break;
+ case TMR_DIV_CFG_OFFSET:
+ PrintDebug("apic %u: core %u: setting tmr_div_cfg to 0x%x\n",
+ apic->lapic_id.val, core->vcpu_id, op_val);
+ apic->tmr_div_cfg.val = op_val;
+ break;
+
+
+ // Enable mask (256 bits)
+ case IER_OFFSET0:
+ *(uint32_t *)(apic->int_en_reg) = op_val;
+ break;
+ case IER_OFFSET1:
+ *(uint32_t *)(apic->int_en_reg + 4) = op_val;
+ break;
+ case IER_OFFSET2:
+ *(uint32_t *)(apic->int_en_reg + 8) = op_val;
+ break;
+ case IER_OFFSET3:
+ *(uint32_t *)(apic->int_en_reg + 12) = op_val;
+ break;
+ case IER_OFFSET4:
+ *(uint32_t *)(apic->int_en_reg + 16) = op_val;
+ break;
+ case IER_OFFSET5:
+ *(uint32_t *)(apic->int_en_reg + 20) = op_val;
+ break;
+ case IER_OFFSET6:
+ *(uint32_t *)(apic->int_en_reg + 24) = op_val;
+ break;
+ case IER_OFFSET7:
+ *(uint32_t *)(apic->int_en_reg + 28) = op_val;
+ break;
+
+ case EXT_INT_LOC_VEC_TBL_OFFSET0:
+ apic->ext_intr_vec_tbl[0].val = op_val;
+ break;
+ case EXT_INT_LOC_VEC_TBL_OFFSET1:
+ apic->ext_intr_vec_tbl[1].val = op_val;
+ break;
+ case EXT_INT_LOC_VEC_TBL_OFFSET2:
+ apic->ext_intr_vec_tbl[2].val = op_val;
+ break;
+ case EXT_INT_LOC_VEC_TBL_OFFSET3:
+ apic->ext_intr_vec_tbl[3].val = op_val;
+ break;
+
+
+ // Action Registers
+ case EOI_OFFSET:
+ // do eoi
+ apic_do_eoi(apic);
+ break;
+
+ case INT_CMD_LO_OFFSET: {
+ // execute command
+
+ struct int_cmd_reg tmp_icr;
+
+ apic->int_cmd.lo = op_val;
+
+ tmp_icr = apic->int_cmd;
+
+ // V3_Print("apic %u: core %u: sending cmd 0x%llx to apic %u\n",
+ // apic->lapic_id.val, core->vcpu_id,
+ // apic->int_cmd.val, apic->int_cmd.dst);
+
+ if (route_ipi(apic_dev, apic, &tmp_icr) == -1) {
+ PrintError("IPI Routing failure\n");
+ return -1;
+ }
+
+ break;
+ }
+ case INT_CMD_HI_OFFSET: {
+ apic->int_cmd.hi = op_val;
+ V3_Print("apic %u: core %u: writing command high=0x%x\n", apic->lapic_id.val, core->vcpu_id,apic->int_cmd.hi);
+
+ break;
+ }
+ // Unhandled Registers
+ case EXT_APIC_CMD_OFFSET:
+ case SEOI_OFFSET:
+ default:
+ PrintError("apic %u: core %u: Write to Unhandled APIC Register: %x (ignored)\n",
+ apic->lapic_id.val, core->vcpu_id, (uint32_t)reg_addr);
+
+ return -1;
+ }
+
+ PrintDebug("apic %u: core %u: Write finished\n", apic->lapic_id.val, core->vcpu_id);
+
+ return length;
+
+}
+
+
+
+/* Interrupt Controller Functions */
+
+
+static int apic_intr_pending(struct guest_info * core, void * private_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(private_data);
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+ int req_irq = 0;
+ int svc_irq = 0;
+
+ // Activate all queued IRQ entries
+ drain_irq_entries(apic);
+
+ // Check for newly activated entries
+ req_irq = get_highest_irr(apic);
+ svc_irq = get_highest_isr(apic);
+
+ // PrintDebug("apic %u: core %u: req_irq=%d, svc_irq=%d\n",apic->lapic_id.val,info->vcpu_id,req_irq,svc_irq);
+
+ if ((req_irq >= 0) &&
+ (req_irq > svc_irq)) {
+ return 1;
+ }
+
+ return 0;
+}
+
+
+
+static int apic_get_intr_number(struct guest_info * core, void * private_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(private_data);
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+ int req_irq = get_highest_irr(apic);
+ int svc_irq = get_highest_isr(apic);
- return -1;
+ if (svc_irq == -1) {
+ return req_irq;
+ } else if (svc_irq < req_irq) {
+ return req_irq;
+ }
+
+ return -1;
}
-static int apic_raise_intr(void * private_data, int irq) {
- struct vm_device * dev = (struct vm_device *)private_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- return activate_apic_irq(apic, irq);
+
+int v3_apic_send_ipi(struct v3_vm_info * vm, struct v3_gen_ipi * ipi, void * dev_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)
+ (((struct vm_device *)dev_data)->private_data);
+ struct int_cmd_reg tmp_icr;
+
+ // zero out all the fields
+ tmp_icr.val = 0;
+
+ tmp_icr.vec = ipi->vector;
+ tmp_icr.del_mode = ipi->mode;
+ tmp_icr.dst_mode = ipi->logical;
+ tmp_icr.trig_mode = ipi->trigger_mode;
+ tmp_icr.dst_shorthand = ipi->dst_shorthand;
+ tmp_icr.dst = ipi->dst;
+
+
+ return route_ipi(apic_dev, NULL, &tmp_icr);
}
-static int apic_lower_intr(void * private_data, int irq) {
- struct vm_device * dev = (struct vm_device *)private_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- int major_offset = irq & ~0x00000007;
- int minor_offset = irq & 0x00000007;
- uchar_t * req_location = apic->int_req_reg + major_offset;
- uchar_t flag = 0x01 << minor_offset;
- *req_location &= ~flag;
+int v3_apic_raise_intr(struct v3_vm_info * vm, uint32_t irq, uint32_t dst, void * dev_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)
+ (((struct vm_device*)dev_data)->private_data);
+ struct apic_state * apic = &(apic_dev->apics[dst]);
+
+ PrintDebug("apic %u core ?: raising interrupt IRQ %u (dst = %u).\n", apic->lapic_id.val, irq, dst);
+
+ add_apic_irq_entry(apic, irq);
- return 0;
+#ifdef V3_CONFIG_MULTITHREAD_OS
+ if ((V3_Get_CPU() != dst)) {
+ v3_interrupt_cpu(vm, dst, 0);
+ }
+#endif
+
+ return 0;
}
-static int apic_begin_irq(void * private_data, int irq) {
- struct vm_device * dev = (struct vm_device *)private_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- int major_offset = irq & ~0x00000007;
- int minor_offset = irq & 0x00000007;
- uchar_t * req_location = apic->int_req_reg + major_offset;
- uchar_t * svc_location = apic->int_svc_reg + major_offset;
- uchar_t flag = 0x01 << minor_offset;
- *svc_location |= flag;
- *req_location &= ~flag;
- return 0;
+static int apic_begin_irq(struct guest_info * core, void * private_data, int irq) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(private_data);
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+ int major_offset = (irq & ~0x00000007) >> 3;
+ int minor_offset = irq & 0x00000007;
+ uint8_t *req_location = apic->int_req_reg + major_offset;
+ uint8_t *svc_location = apic->int_svc_reg + major_offset;
+ uint8_t flag = 0x01 << minor_offset;
+
+ if (*req_location & flag) {
+ // we will only pay attention to a begin irq if we
+ // know that we initiated it!
+ *svc_location |= flag;
+ *req_location &= ~flag;
+ } else {
+ // do nothing...
+ //PrintDebug("apic %u: core %u: begin irq for %d ignored since I don't own it\n",
+ // apic->lapic_id.val, core->vcpu_id, irq);
+ }
+
+ return 0;
}
+
+
/* Timer Functions */
-static void apic_update_time(ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct apic_state * apic = (struct apic_state *)dev->private_data;
- // The 32 bit GCC runtime is a pile of shit
+
+static void apic_update_time(struct guest_info * core,
+ uint64_t cpu_cycles, uint64_t cpu_freq,
+ void * priv_data) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
+ struct apic_state * apic = &(apic_dev->apics[core->vcpu_id]);
+
+ // The 32 bit GCC runtime is a pile of shit
#ifdef __V3_64BIT__
- uint64_t tmr_ticks = 0;
+ uint64_t tmr_ticks = 0;
#else
- uint32_t tmr_ticks = 0;
+ uint32_t tmr_ticks = 0;
#endif
- uchar_t tmr_div = *(uchar_t *)&(apic->tmr_div_cfg.val);
- uint_t shift_num = 0;
+ uint8_t tmr_div = *(uint8_t *)&(apic->tmr_div_cfg.val);
+ uint_t shift_num = 0;
- // Check whether this is true:
- // -> If the Init count is zero then the timer is disabled
- // and doesn't just blitz interrupts to the CPU
- if ((apic->tmr_init_cnt == 0) ||
- ( (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_ONESHOT) &&
- (apic->tmr_cur_cnt == 0))) {
- //PrintDebug("APIC timer not yet initialized\n");
- return;
- }
-
-
- switch (tmr_div) {
- case APIC_TMR_DIV1:
- shift_num = 0;
- break;
- case APIC_TMR_DIV2:
- shift_num = 1;
- break;
- case APIC_TMR_DIV4:
- shift_num = 2;
- break;
- case APIC_TMR_DIV8:
- shift_num = 3;
- break;
- case APIC_TMR_DIV16:
- shift_num = 4;
- break;
- case APIC_TMR_DIV32:
- shift_num = 5;
- break;
- case APIC_TMR_DIV64:
- shift_num = 6;
- break;
- case APIC_TMR_DIV128:
- shift_num = 7;
- break;
- default:
- PrintError("Invalid Timer Divider configuration\n");
- return;
- }
+ // Check whether this is true:
+ // -> If the Init count is zero then the timer is disabled
+ // and doesn't just blitz interrupts to the CPU
+ if ((apic->tmr_init_cnt == 0) ||
+ ( (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_ONESHOT) &&
+ (apic->tmr_cur_cnt == 0))) {
+ //PrintDebug("apic %u: core %u: APIC timer not yet initialized\n",apic->lapic_id.val,info->vcpu_id);
+ return;
+ }
+
- tmr_ticks = cpu_cycles >> shift_num;
- PrintDebug("Timer Ticks: %p\n", (void *)tmr_ticks);
+ switch (tmr_div) {
+ case APIC_TMR_DIV1:
+ shift_num = 0;
+ break;
+ case APIC_TMR_DIV2:
+ shift_num = 1;
+ break;
+ case APIC_TMR_DIV4:
+ shift_num = 2;
+ break;
+ case APIC_TMR_DIV8:
+ shift_num = 3;
+ break;
+ case APIC_TMR_DIV16:
+ shift_num = 4;
+ break;
+ case APIC_TMR_DIV32:
+ shift_num = 5;
+ break;
+ case APIC_TMR_DIV64:
+ shift_num = 6;
+ break;
+ case APIC_TMR_DIV128:
+ shift_num = 7;
+ break;
+ default:
+ PrintError("apic %u: core %u: Invalid Timer Divider configuration\n",
+ apic->lapic_id.val, core->vcpu_id);
+ return;
+ }
+
+ tmr_ticks = cpu_cycles >> shift_num;
+ // PrintDebug("Timer Ticks: %p\n", (void *)tmr_ticks);
+
+ if (tmr_ticks < apic->tmr_cur_cnt) {
+ apic->tmr_cur_cnt -= tmr_ticks;
+ } else {
+ tmr_ticks -= apic->tmr_cur_cnt;
+ apic->tmr_cur_cnt = 0;
- if (tmr_ticks <= apic->tmr_cur_cnt) {
- apic->tmr_cur_cnt -= tmr_ticks;
- } else {
- tmr_ticks -= apic->tmr_cur_cnt;
- apic->tmr_cur_cnt = 0;
+ // raise irq
+ PrintDebug("apic %u: core %u: Raising APIC Timer interrupt (periodic=%d) (icnt=%d) (div=%d)\n",
+ apic->lapic_id.val, core->vcpu_id,
+ apic->tmr_vec_tbl.tmr_mode, apic->tmr_init_cnt, shift_num);
+
+ if (apic_intr_pending(core, priv_data)) {
+ PrintDebug("apic %u: core %u: Overriding pending IRQ %d\n",
+ apic->lapic_id.val, core->vcpu_id,
+ apic_get_intr_number(core, priv_data));
+ }
- // raise irq
- if (activate_internal_irq(apic, APIC_TMR_INT) == -1) {
- PrintError("Could not raise Timer interrupt\n");
+ if (activate_internal_irq(apic, APIC_TMR_INT) == -1) {
+ PrintError("apic %u: core %u: Could not raise Timer interrupt\n",
+ apic->lapic_id.val, core->vcpu_id);
+ }
+
+ if (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_PERIODIC) {
+ static unsigned int nexits = 0;
+ static unsigned int missed_ints = 0;
+
+ nexits++;
+ missed_ints += tmr_ticks / apic->tmr_init_cnt;
+
+ if ((missed_ints > 0) && (nexits >= 5000)) {
+ V3_Print("apic %u: core %u: missed %u timer interrupts total in last %u exits.\n",
+ apic->lapic_id.val, core->vcpu_id, missed_ints, nexits);
+ missed_ints = 0;
+ nexits = 0;
+ }
+
+ tmr_ticks = tmr_ticks % apic->tmr_init_cnt;
+ apic->tmr_cur_cnt = apic->tmr_init_cnt - tmr_ticks;
+ }
}
- }
- if (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_PERIODIC) {
- tmr_ticks = tmr_ticks % apic->tmr_init_cnt;
- apic->tmr_init_cnt = apic->tmr_init_cnt - tmr_ticks;
- }
+ return;
}
-
static struct intr_ctrl_ops intr_ops = {
- .intr_pending = apic_intr_pending,
- .get_intr_number = apic_get_intr_number,
- .raise_intr = apic_raise_intr,
- .begin_irq = apic_begin_irq,
- .lower_intr = apic_lower_intr,
+ .intr_pending = apic_intr_pending,
+ .get_intr_number = apic_get_intr_number,
+ .begin_irq = apic_begin_irq,
};
-static struct vm_timer_ops timer_ops = {
- .update_time = apic_update_time,
+static struct v3_timer_ops timer_ops = {
+ .update_timer = apic_update_time,
};
-static int apic_init(struct vm_device * dev) {
- struct guest_info * info = dev->vm;
- struct apic_state * apic = (struct apic_state *)(dev->private_data);
- v3_set_intr_controller(dev->vm, &intr_ops, dev);
- v3_add_timer(dev->vm, &timer_ops, dev);
- init_apic_state(apic);
+static int apic_free(struct apic_dev_state * apic_dev) {
+ int i = 0;
+ struct v3_vm_info * vm = NULL;
+
+ for (i = 0; i < apic_dev->num_apics; i++) {
+ struct apic_state * apic = &(apic_dev->apics[i]);
+ struct guest_info * core = apic->core;
+
+ vm = core->vm_info;
+
+ v3_remove_intr_controller(core, apic->controller_handle);
+
+ if (apic->timer) {
+ v3_remove_timer(core, apic->timer);
+ }
+
+ // unhook memory
+
+ }
+
+ v3_unhook_msr(vm, BASE_ADDR_MSR);
+
+ V3_Free(apic_dev);
+ return 0;
+}
- v3_hook_msr(info, BASE_ADDR_MSR, read_apic_msr, write_apic_msr, dev);
+#ifdef V3_CONFIG_CHECKPOINT
+static int apic_save(struct v3_chkpt_ctx * ctx, void * private_data) {
+ struct apic_dev_state * apic_state = (struct apic_dev_state *)private_data;
+ int i = 0;
+
+ V3_CHKPT_STD_SAVE(ctx, apic_state->num_apics);
+
+ //V3_CHKPT_STD_SAVE(ctx,apic_state->state_lock);
+ for (i = 0; i < apic_state->num_apics; i++) {
+
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].base_addr);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].base_addr_msr);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].lapic_id);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].apic_ver);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].ext_apic_ctrl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].local_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].tmr_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].tmr_div_cfg);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].lint0_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].lint1_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].perf_ctr_loc_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].therm_loc_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].err_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].err_status);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].spurious_int);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].int_cmd);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].log_dst);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].dst_fmt);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].arb_prio);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].task_prio);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].proc_prio);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].ext_apic_feature);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].spec_eoi);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].tmr_cur_cnt);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].tmr_init_cnt);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].ext_intr_vec_tbl);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].rem_rd_data);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].ipi_state);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].int_req_reg);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].int_svc_reg);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].int_en_reg);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].trig_mode_reg);
+ V3_CHKPT_STD_SAVE(ctx, apic_state->apics[i].eoi);
- v3_hook_full_mem(info, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, dev);
+ }
- return 0;
+ return 0;
}
-static int apic_deinit(struct vm_device * dev) {
- struct guest_info * info = dev->vm;
+static int apic_load(struct v3_chkpt_ctx * ctx, void * private_data) {
+ struct apic_dev_state *apic_state = (struct apic_dev_state *)private_data;
+ int i = 0;
+
+ V3_CHKPT_STD_LOAD(ctx,apic_state->num_apics);
+
+ for (i = 0; i < apic_state->num_apics; i++) {
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].base_addr);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].base_addr_msr);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].lapic_id);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].apic_ver);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].ext_apic_ctrl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].local_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].tmr_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].tmr_div_cfg);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].lint0_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].lint1_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].perf_ctr_loc_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].therm_loc_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].err_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].err_status);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].spurious_int);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].int_cmd);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].log_dst);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].dst_fmt);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].arb_prio);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].task_prio);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].proc_prio);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].ext_apic_feature);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].spec_eoi);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].tmr_cur_cnt);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].tmr_init_cnt);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].ext_intr_vec_tbl);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].rem_rd_data);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].ipi_state);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].int_req_reg);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].int_svc_reg);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].int_en_reg);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].trig_mode_reg);
+ V3_CHKPT_STD_LOAD(ctx, apic_state->apics[i].eoi);
+ }
- v3_unhook_msr(info, BASE_ADDR_MSR);
- return 0;
+ return 0;
}
+#endif
-static struct vm_device_ops dev_ops = {
- .init = apic_init,
- .deinit = apic_deinit,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
+static struct v3_device_ops dev_ops = {
+ .free = (int (*)(void *))apic_free,
+#ifdef V3_CONFIG_CHECKPOINT
+ .save = apic_save,
+ .load = apic_load
+#endif
};
-struct vm_device * v3_create_apic() {
- PrintDebug("Creating APIC\n");
- struct apic_state * apic = (struct apic_state *)V3_Malloc(sizeof(struct apic_state));
+static int apic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
+ char * dev_id = v3_cfg_val(cfg, "ID");
+ struct apic_dev_state * apic_dev = NULL;
+ int i = 0;
- struct vm_device * device = v3_create_device("APIC", &dev_ops, apic);
-
- return device;
+ PrintDebug("apic: creating an APIC for each core\n");
+
+ apic_dev = (struct apic_dev_state *)V3_Malloc(sizeof(struct apic_dev_state) +
+ sizeof(struct apic_state) * vm->num_cores);
+
+ apic_dev->num_apics = vm->num_cores;
+ v3_lock_init(&(apic_dev->state_lock));
+
+ struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, apic_dev);
+
+ if (dev == NULL) {
+ PrintError("apic: Could not attach device %s\n", dev_id);
+ V3_Free(apic_dev);
+ return -1;
+ }
+
+
+ for (i = 0; i < vm->num_cores; i++) {
+ struct apic_state * apic = &(apic_dev->apics[i]);
+ struct guest_info * core = &(vm->cores[i]);
+
+ apic->core = core;
+
+ init_apic_state(apic, i);
+
+ apic->controller_handle = v3_register_intr_controller(core, &intr_ops, apic_dev);
+
+ apic->timer = v3_add_timer(core, &timer_ops, apic_dev);
+
+ if (apic->timer == NULL) {
+ PrintError("APIC: Failed to attach timer to core %d\n", i);
+ v3_remove_device(dev);
+ return -1;
+ }
+
+ v3_hook_full_mem(vm, core->vcpu_id, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, apic_dev);
+
+ PrintDebug("apic %u: (setup device): done, my id is %u\n", i, apic->lapic_id.val);
+ }
+
+#ifdef V3_CONFIG_DEBUG_APIC
+ for (i = 0; i < vm->num_cores; i++) {
+ struct apic_state * apic = &(apic_dev->apics[i]);
+ PrintDebug("apic: sanity check: apic %u (at %p) has id %u and msr value %llx and core at %p\n",
+ i, apic, apic->lapic_id.val, apic->base_addr_msr.value,apic->core);
+ }
+#endif
+
+
+ PrintDebug("apic: priv_data is at %p\n", apic_dev);
+
+ v3_hook_msr(vm, BASE_ADDR_MSR, read_apic_msr, write_apic_msr, apic_dev);
+
+ return 0;
}
+
+
+
+device_register("LAPIC", apic_init)
