* 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.h>
#include <devices/apic_regs.h>
-#include <devices/icc_bus.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>
-#ifndef CONFIG_DEBUG_APIC
+
+
+#ifndef V3_CONFIG_DEBUG_APIC
#undef PrintDebug
#define PrintDebug(fmt, args...)
-#endif
+#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 BASE_ADDR_MSR 0x0000001B
+#define APIC_DEST_PHYSICAL 0x0
+#define APIC_DEST_LOGICAL 0x1
+
+
+#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;
+ uint64_t value;
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;
+ 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));
+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;
+ struct apic_msr base_addr_msr;
/* memory map registers */
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];
-
+ 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;
+
uint32_t eoi;
- struct vm_device * icc_bus;
- v3_lock_t lock;
};
+
+
+
+struct apic_dev_state {
+ int num_apics;
+
+ 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);
-static void init_apic_state(struct apic_state * apic) {
+// No lcoking done
+static void init_apic_state(struct apic_state * apic, uint32_t id) {
apic->base_addr = DEFAULT_BASE_ADDR;
- apic->base_addr_msr.value = 0x0000000000000900LL;
+
+ 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("Sizeof Interrupt Request Register %d, should be 32\n",
- (uint_t)sizeof(apic->int_req_reg));
+ 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));
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;
+ 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->ext_apic_ctrl.val = 0x00000000;
apic->spec_eoi.val = 0x00000000;
- v3_lock_init(&(apic->lock));
+
}
+
static int read_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t * dst, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct apic_state * apics = (struct apic_state *)(dev->private_data);
- struct apic_state * apic = &(apics[core->cpu_id]);
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)priv_data;
+ struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
+
+ PrintDebug("apic %u: core %u: MSR read\n", apic->lapic_id.val, core->cpu_id);
- v3_lock(apic->lock);
dst->value = apic->base_addr;
- v3_unlock(apic->lock);
+
return 0;
}
static int write_apic_msr(struct guest_info * core, uint_t msr, v3_msr_t src, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct apic_state * apics = (struct apic_state *)(dev->private_data);
- struct apic_state * apic = &(apics[core->cpu_id]);
- struct v3_shadow_region * old_reg = v3_get_shadow_region(dev->vm, core->cpu_id, apic->base_addr);
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)priv_data;
+ struct apic_state * apic = &(apic_dev->apics[core->cpu_id]);
+ struct v3_mem_region * old_reg = v3_get_mem_region(core->vm_info, core->cpu_id, apic->base_addr);
+ PrintDebug("apic %u: core %u: MSR write\n", apic->lapic_id.val, core->cpu_id);
+
if (old_reg == NULL) {
// uh oh...
- PrintError("APIC Base address region does not exit...\n");
+ PrintError("apic %u: core %u: APIC Base address region does not exit...\n",
+ apic->lapic_id.val, core->cpu_id);
return -1;
}
- v3_lock(apic->lock);
- v3_delete_shadow_region(dev->vm, old_reg);
+
+ v3_delete_mem_region(core->vm_info, old_reg);
apic->base_addr = src.value;
- 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) {
- PrintError("Could not hook new APIC Base address\n");
- v3_unlock(apic->lock);
+ if (v3_hook_full_mem(core->vm_info, core->cpu_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->cpu_id);
+
return -1;
}
- v3_unlock(apic->lock);
+
return 0;
}
// irq_num is the bit offset into a 256 bit buffer...
+// return values
+// -1 = error
+// 0 = OK, no interrupt needed now
+// 1 = OK, interrupt needed now
static int activate_apic_irq(struct apic_state * apic, uint32_t irq_num) {
int major_offset = (irq_num & ~0x00000007) >> 3;
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;
+ 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 (irq_num <= 15) {
- PrintError("Attempting to raise an invalid interrupt: %d\n", irq_num);
+
+ if (irq_num <= 15 || irq_num>255) {
+ PrintError("apic %u: core %d: Attempting to raise an invalid interrupt: %d\n",
+ apic->lapic_id.val, apic->core->cpu_id, irq_num);
return -1;
}
- PrintDebug("Raising APIC IRQ %d\n", irq_num);
+
+ PrintDebug("apic %u: core %d: Raising APIC IRQ %d\n", apic->lapic_id.val, apic->core->cpu_id, irq_num);
if (*req_location & flag) {
- //V3_Print("Interrupts coallescing\n");
+ PrintDebug("Interrupt %d coallescing\n", irq_num);
+ return 0;
}
if (*en_location & flag) {
*req_location |= flag;
+ return 1;
} else {
- PrintDebug("Interrupt not enabled... %.2x\n", *en_location);
- return 0;
+ PrintDebug("apic %u: core %d: Interrupt not enabled... %.2x\n",
+ apic->lapic_id.val, apic->core->cpu_id,*en_location);
}
return 0;
// We iterate backwards to find the highest priority
for (i = 31; i >= 0; i--) {
- uchar_t * svc_major = apic->int_svc_reg + i;
+ uint8_t * svc_major = apic->int_svc_reg + i;
if ((*svc_major) & 0xff) {
for (j = 7; j >= 0; j--) {
- uchar_t flag = 0x1 << j;
+ uint8_t flag = 0x1 << j;
if ((*svc_major) & flag) {
return ((i * 8) + j);
}
// We iterate backwards to find the highest priority
for (i = 31; i >= 0; i--) {
- uchar_t * req_major = apic->int_req_reg + i;
+ uint8_t * req_major = apic->int_req_reg + i;
if ((*req_major) & 0xff) {
for (j = 7; j >= 0; j--) {
- uchar_t flag = 0x1 << j;
+ uint8_t flag = 0x1 << j;
if ((*req_major) & flag) {
return ((i * 8) + j);
}
if (isr_irq != -1) {
int major_offset = (isr_irq & ~0x00000007) >> 3;
int minor_offset = isr_irq & 0x00000007;
- uchar_t flag = 0x1 << minor_offset;
- uchar_t * svc_location = apic->int_svc_reg + major_offset;
+ uint8_t flag = 0x1 << minor_offset;
+ uint8_t * svc_location = apic->int_svc_reg + major_offset;
- PrintDebug("Received APIC EOI for IRQ %d\n", isr_irq);
+ PrintDebug("apic %u: core ?: Received APIC EOI for IRQ %d\n", apic->lapic_id.val,isr_irq);
*svc_location &= ~flag;
-#ifdef CONFIG_CRAY_XT
+#ifdef V3_CONFIG_CRAY_XT
if ((isr_irq == 238) ||
(isr_irq == 239)) {
- PrintError("Acking IRQ %d\n", isr_irq);
+ PrintDebug("apic %u: core ?: Acking IRQ %d\n", apic->lapic_id.val,isr_irq);
}
if (isr_irq == 238) {
}
#endif
} else {
- //PrintError("Spurious EOI...\n");
+ //PrintError("apic %u: core ?: Spurious EOI...\n",apic->lapic_id.val);
}
return 0;
masked = apic->err_vec_tbl.mask;
break;
default:
- PrintError("Invalid APIC interrupt type\n");
+ PrintError("apic %u: core ?: Invalid APIC interrupt type\n", apic->lapic_id.val);
return -1;
}
// interrupt is masked, don't send
if (masked == 1) {
- PrintDebug("Inerrupt is masked\n");
+ PrintDebug("apic %u: core ?: Inerrupt is masked\n", apic->lapic_id.val);
return 0;
}
//PrintDebug("Activating internal APIC IRQ %d\n", vec_num);
return activate_apic_irq(apic, vec_num);
} else {
- PrintError("Unhandled Delivery Mode\n");
+ PrintError("apic %u: core ?: Unhandled Delivery Mode\n", apic->lapic_id.val);
+ return -1;
+ }
+}
+
+
+
+static inline int should_deliver_cluster_ipi(struct guest_info * dst_core,
+ struct apic_state * dst_apic, uint8_t mda) {
+
+ 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) */
+
+ PrintDebug("apic %u core %u: accepting clustered IRQ (mda 0x%x == log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->cpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
+
+ return 1;
+ } else {
+ PrintDebug("apic %u core %u: rejecting clustered IRQ (mda 0x%x != log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->cpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
+ return 0;
+ }
+}
+
+static inline int should_deliver_flat_ipi(struct guest_info * dst_core,
+ struct apic_state * dst_apic, uint8_t mda) {
+
+ if (dst_apic->log_dst.dst_log_id & mda) { // I am in the set
+
+ PrintDebug("apic %u core %u: accepting flat IRQ (mda 0x%x == log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->cpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
+
+ return 1;
+
+ } else {
+
+ PrintDebug("apic %u core %u: rejecting flat IRQ (mda 0x%x != log_dst 0x%x)\n",
+ dst_apic->lapic_id.val, dst_core->cpu_id, mda,
+ dst_apic->log_dst.dst_log_id);
+ return 0;
+ }
+}
+
+
+
+static int should_deliver_ipi(struct guest_info * dst_core,
+ struct apic_state * dst_apic, uint8_t mda) {
+
+
+ if (dst_apic->dst_fmt.model == 0xf) {
+
+ if (mda == 0xff) {
+ /* always deliver broadcast */
+ return 1;
+ }
+
+ return should_deliver_flat_ipi(dst_core, dst_apic, mda);
+
+ } else if (dst_apic->dst_fmt.model == 0x0) {
+
+ if (mda == 0xff) {
+ /* always deliver broadcast */
+ return 1;
+ }
+
+ return should_deliver_cluster_ipi(dst_core, dst_apic, mda);
+
+ } else {
+ PrintError("apic %u core %u: invalid destination format register value 0x%x for logical mode delivery.\n",
+ dst_apic->lapic_id.val, dst_core->cpu_id, dst_apic->dst_fmt.model);
return -1;
}
}
+// 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!
+
+ int do_xcall;
+
+ PrintDebug("delivering IRQ %d to core %u\n", vector, dst_core->cpu_id);
+
+ do_xcall = activate_apic_irq(dst_apic, vector);
+
+ if (do_xcall < 0) {
+ PrintError("Failed to activate apic irq!\n");
+ return -1;
+ }
+
+ if (do_xcall && (dst_apic != src_apic)) {
+ // Assume core # is same as logical processor for now
+ // TODO FIX THIS FIX THIS
+ // THERE SHOULD BE: guestapicid->virtualapicid map,
+ // cpu_id->logical processor map
+ // host maitains logical proc->phsysical proc
+ PrintDebug(" non-local core with new interrupt, forcing it to exit now\n");
+
+#ifdef V3_CONFIG_MULTITHREAD_OS
+ v3_interrupt_cpu(dst_core->vm_info, dst_core->cpu_id, 0);
+#else
+ V3_ASSERT(0);
+#endif
+ }
+
+ break;
+ }
+ case APIC_INIT_DELIVERY: {
+
+ PrintDebug(" INIT delivery to core %u\n", dst_core->cpu_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->cpu_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->cpu_id, dst_apic->ipi_state);
+ break;
+ }
+
+ // Write the RIP, CS, and descriptor
+ // assume the rest is already good to go
+ //
+ // vector VV -> rip at 0
+ // CS = VV00
+ // This means we start executing at linear address VV000
+ //
+ // So the selector needs to be VV00
+ // and the base needs to be VV000
+ //
+ dst_core->rip = 0;
+ dst_core->segments.cs.selector = vector << 8;
+ dst_core->segments.cs.limit = 0xffff;
+ dst_core->segments.cs.base = vector << 12;
+
+ PrintDebug(" SIPI delivery (0x%x -> 0x%x:0x0) to core %u\n",
+ vector, dst_core->segments.cs.selector, dst_core->cpu_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_SMI_DELIVERY:
+ case APIC_RES1_DELIVERY: // reserved
+ case APIC_NMI_DELIVERY:
+ case APIC_EXTINT_DELIVERY: // ExtInt
+ 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, struct int_cmd_reg *icr)
+{
+ int i;
+
+ if (icr->dst >0 && icr->dst < apic_dev->num_apics) {
+ // see if it simply is the core id
+ if (apic_dev->apics[icr->dst].lapic_id.val == icr->dst) {
+ return &(apic_dev->apics[icr->dst]);
+ }
+ }
+
+ for (i=0;i<apic_dev->num_apics;i++) {
+ if (apic_dev->apics[i].lapic_id.val == icr->dst) {
+ return &(apic_dev->apics[i]);
+ }
+ }
+
+ return NULL;
+
+}
+
+
+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);
+
+ 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;
+ }
+
+
+ V3_Print("apic: done\n");
+
+
+ } else if (icr->dst_mode == APIC_DEST_LOGICAL) {
+
+ if (icr->del_mode!=APIC_LOWEST_DELIVERY ) {
+ // logical, but not lowest priority
+ // we immediately trigger
+ // fixed, smi, reserved, nmi, init, sipi, etc
+ int i;
+
+ uint8_t mda = icr->dst;
+
+ for (i = 0; i < apic_dev->num_apics; i++) {
+
+ dest_apic = &(apic_dev->apics[i]);
+
+ int del_flag = should_deliver_ipi(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
+ // logical, lowest priority
+ int i;
+ struct apic_state * cur_best_apic = NULL;
+ uint8_t mda = icr->dst;
+
+ for (i = 0; i < apic_dev->num_apics; i++) {
+ int del_flag = 0;
+
+ dest_apic = &(apic_dev->apics[i]);
+
+ del_flag = should_deliver_ipi(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
+ if (!cur_best_apic) {
+ cur_best_apic = dest_apic;
+ } else if (dest_apic->task_prio.val < cur_best_apic->task_prio.val) {
+ cur_best_apic = dest_apic;
+ }
+ }
+ }
+
+ // 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_state * apic = (struct apic_state *)priv_data;
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
+ struct apic_state * apic = &(apic_dev->apics[core->cpu_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("Read apic address space (%p)\n",
- (void *)guest_addr);
+ PrintDebug("apic %u: core %u: at %p: Read apic address space (%p)\n",
+ apic->lapic_id.val, core->cpu_id, apic, (void *)guest_addr);
if (msr->apic_enable == 0) {
- PrintError("Write to APIC address space with disabled APIC\n");
+ PrintError("apic %u: core %u: Read from APIC address space with disabled APIC, apic msr=0x%llx\n",
+ apic->lapic_id.val, core->cpu_id, apic->base_addr_msr.value);
return -1;
}
case SEOI_OFFSET:
default:
- PrintError("Read from Unhandled APIC Register: %x\n", (uint32_t)reg_addr);
+ PrintError("apic %u: core %u: Read from Unhandled APIC Register: %x (getting zero)\n",
+ apic->lapic_id.val, core->cpu_id, (uint32_t)reg_addr);
return -1;
}
*val_ptr = val;
} else {
- PrintError("Invalid apic read length (%d)\n", length);
+ PrintError("apic %u: core %u: Invalid apic read length (%d)\n",
+ apic->lapic_id.val, core->cpu_id, length);
return -1;
}
- PrintDebug("Read finished (val=%x)\n", *(uint32_t *)dst);
+ PrintDebug("apic %u: core %u: Read finished (val=%x)\n",
+ apic->lapic_id.val, core->cpu_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_state * apic = (struct apic_state *)priv_data;
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(priv_data);
+ struct apic_state * apic = &(apic_dev->apics[core->cpu_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;
- PrintDebug("Write to apic address space (%p) (val=%x)\n",
- (void *)guest_addr, *(uint32_t *)src);
+ PrintDebug("apic %u: core %u: at %p and priv_data is at %p\n",
+ apic->lapic_id.val, core->cpu_id, apic, priv_data);
+
+ PrintDebug("apic %u: core %u: write to address space (%p) (val=%x)\n",
+ apic->lapic_id.val, core->cpu_id, (void *)guest_addr, *(uint32_t *)src);
if (msr->apic_enable == 0) {
- PrintError("Write to APIC address space with disabled APIC\n");
+ PrintError("apic %u: core %u: Write to APIC address space with disabled APIC, apic msr=0x%llx\n",
+ apic->lapic_id.val, core->cpu_id, apic->base_addr_msr.value);
return -1;
}
if (length != 4) {
- PrintError("Invalid apic write length (%d)\n", length);
+ PrintError("apic %u: core %u: Invalid apic write length (%d)\n",
+ apic->lapic_id.val, length, core->cpu_id);
return -1;
}
case TRIG_OFFSET7:
case PPR_OFFSET:
case EXT_APIC_FEATURE_OFFSET:
-#if 1
- PrintError("Attempting to write to read only register %p (ignored)\n", (void *)reg_addr);
-#else
- PrintError("Attempting to write to read only register %p (error)\n", (void *)reg_addr);
- return -1;
-#endif
+
+ PrintError("apic %u: core %u: Attempting to write to read only register %p (error)\n",
+ apic->lapic_id.val, core->cpu_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->cpu_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->cpu_id, op_val);
apic->log_dst.val = op_val;
break;
case DFR_OFFSET:
// Action Registers
case EOI_OFFSET:
- // do eoi
+ // do eoi
apic_do_eoi(apic);
break;
- case INT_CMD_LO_OFFSET:
+ case INT_CMD_LO_OFFSET: {
+ // execute command
+
+ struct int_cmd_reg tmp_icr;
+
apic->int_cmd.lo = op_val;
- // ICC???
- v3_icc_send_irq(apic->icc_bus, apic->int_cmd.dst, apic->int_cmd.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->cpu_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:
+ }
+ case INT_CMD_HI_OFFSET: {
apic->int_cmd.hi = op_val;
- break;
- // Unhandled Registers
+ V3_Print("apic %u: core %u: writing command high=0x%x\n", apic->lapic_id.val, core->cpu_id,apic->int_cmd.hi);
+ break;
+ }
+ // Unhandled Registers
case EXT_APIC_CMD_OFFSET:
case SEOI_OFFSET:
default:
- PrintError("Write to Unhandled APIC Register: %x\n", (uint32_t)reg_addr);
+ PrintError("apic %u: core %u: Write to Unhandled APIC Register: %x (ignored)\n",
+ apic->lapic_id.val, core->cpu_id, (uint32_t)reg_addr);
+
return -1;
}
- PrintDebug("Write finished\n");
+ PrintDebug("apic %u: core %u: Write finished\n", apic->lapic_id.val, core->cpu_id);
return length;
+
}
/* Interrupt Controller Functions */
-// returns 1 if an interrupt is pending, 0 otherwise
-static int apic_intr_pending(struct guest_info * info, void * private_data) {
- struct apic_state * apic = (struct apic_state *)private_data;
+
+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->cpu_id]);
int req_irq = get_highest_irr(apic);
int svc_irq = get_highest_isr(apic);
+ // PrintDebug("apic %u: core %u: req_irq=%d, svc_irq=%d\n",apic->lapic_id.val,info->cpu_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 * info, void * private_data) {
- struct apic_state * apic = (struct apic_state *)private_data;
+
+
+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->cpu_id]);
int req_irq = get_highest_irr(apic);
int svc_irq = get_highest_isr(apic);
}
-static int apic_raise_intr(struct guest_info * info, int irq, void * private_data) {
- struct apic_state * apic = (struct apic_state *)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);
}
+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]);
+ int do_xcall;
-static int apic_begin_irq(struct guest_info * info, void * private_data, int irq) {
- struct apic_state * apic = (struct apic_state *)private_data;
- int major_offset = (irq & ~0x00000007) >> 3;
- 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;
+ PrintDebug("apic %u core ?: raising interrupt IRQ %u (dst = %u).\n", apic->lapic_id.val, irq, dst);
- *svc_location |= flag;
- *req_location &= ~flag;
+ do_xcall = activate_apic_irq(apic, irq);
+ if (do_xcall < 0) {
+ PrintError("Failed to activate apic irq\n");
+ return -1;
+ }
+
+ if (do_xcall > 0 && (V3_Get_CPU() != dst)) {
+#ifdef V3_CONFIG_MULTITHREAD_OS
+ v3_interrupt_cpu(vm, dst, 0);
+#else
+ V3_ASSERT(0);
+#endif
+ }
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->cpu_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->cpu_id, irq);
+ }
+
+ return 0;
+}
+
+
+
+
/* Timer Functions */
-static void apic_update_time(struct guest_info * info, ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data) {
- struct apic_state * apic = (struct apic_state *)priv_data;
+
+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->cpu_id]);
+
// The 32 bit GCC runtime is a pile of shit
#ifdef __V3_64BIT__
uint64_t tmr_ticks = 0;
uint32_t tmr_ticks = 0;
#endif
- uchar_t tmr_div = *(uchar_t *)&(apic->tmr_div_cfg.val);
+ uint8_t tmr_div = *(uint8_t *)&(apic->tmr_div_cfg.val);
uint_t shift_num = 0;
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");
+ //PrintDebug("apic %u: core %u: APIC timer not yet initialized\n",apic->lapic_id.val,info->cpu_id);
return;
}
shift_num = 7;
break;
default:
- PrintError("Invalid Timer Divider configuration\n");
+ PrintError("apic %u: core %u: Invalid Timer Divider configuration\n",
+ apic->lapic_id.val, core->cpu_id);
return;
}
apic->tmr_cur_cnt = 0;
// raise irq
- PrintDebug("Raising APIC Timer interrupt (periodic=%d) (icnt=%d) (div=%d)\n",
+ PrintDebug("apic %u: core %u: Raising APIC Timer interrupt (periodic=%d) (icnt=%d) (div=%d)\n",
+ apic->lapic_id.val, core->cpu_id,
apic->tmr_vec_tbl.tmr_mode, apic->tmr_init_cnt, shift_num);
- if (apic_intr_pending(info, priv_data)) {
- PrintDebug("Overriding pending IRQ %d\n", apic_get_intr_number(info, priv_data));
+ if (apic_intr_pending(core, priv_data)) {
+ PrintDebug("apic %u: core %u: Overriding pending IRQ %d\n",
+ apic->lapic_id.val, core->cpu_id,
+ apic_get_intr_number(core, priv_data));
}
if (activate_internal_irq(apic, APIC_TMR_INT) == -1) {
- PrintError("Could not raise Timer interrupt\n");
+ PrintError("apic %u: core %u: Could not raise Timer interrupt\n",
+ apic->lapic_id.val, core->cpu_id);
}
if (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_PERIODIC) {
}
}
-
+ return;
}
};
-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_free(struct vm_device * dev) {
- // struct apic_state * apic = (struct apic_state *)dev->private_data;
+static int apic_free(struct apic_dev_state * apic_dev) {
+ int i = 0;
+ struct v3_vm_info * vm = NULL;
- v3_unhook_msr(dev->vm, BASE_ADDR_MSR);
+ 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;
- return 0;
-}
+ v3_remove_intr_controller(core, apic->controller_handle);
+ if (apic->timer) {
+ v3_remove_timer(core, apic->timer);
+ }
-static struct v3_device_ops dev_ops = {
- .free = apic_free,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
-};
+ // unhook memory
+ }
+
+ v3_unhook_msr(vm, BASE_ADDR_MSR);
+
+ V3_Free(apic_dev);
+ return 0;
+}
-static struct v3_icc_ops icc_ops = {
- .raise_intr = apic_raise_intr,
+static struct v3_device_ops dev_ops = {
+ .free = (int (*)(void *))apic_free,
};
static int apic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
- PrintDebug("Creating APIC\n");
- char * name = v3_cfg_val(cfg, "name");
- char * icc_name = v3_cfg_val(cfg,"irq_bus");
- struct vm_device * icc = v3_find_dev(vm, icc_name);
- int i;
+ char * dev_id = v3_cfg_val(cfg, "ID");
+ struct apic_dev_state * apic_dev = NULL;
+ int i = 0;
- if (!icc) {
- PrintError("Cannot find ICC Bus (%s)\n", icc_name);
- return -1;
- }
+ PrintDebug("apic: creating an APIC for each core\n");
- // We allocate one apic per core
- // APICs are accessed via index which correlates with the core's cpu_id
- struct apic_state * apic = (struct apic_state *)V3_Malloc(sizeof(struct apic_state) * vm->num_cores);
+ apic_dev = (struct apic_dev_state *)V3_Malloc(sizeof(struct apic_dev_state) +
+ sizeof(struct apic_state) * vm->num_cores);
- struct vm_device * dev = v3_allocate_device(name, &dev_ops, apic);
+ apic_dev->num_apics = vm->num_cores;
- if (v3_attach_device(vm, dev) == -1) {
- PrintError("Could not attach device %s\n", name);
+ 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]);
- v3_register_intr_controller(core, &intr_ops, &(apic[i]));
- v3_add_timer(core, &timer_ops, &(apic[i]));
- v3_hook_full_mem(vm, core->cpu_id, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, &(apic[i]));
+ apic->core = core;
+
+ init_apic_state(apic, i);
- v3_icc_register_apic(core, icc, i, &icc_ops, &(apic[i]));
+ apic->controller_handle = v3_register_intr_controller(core, &intr_ops, apic_dev);
- init_apic_state(&(apic[i]));
+ 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->cpu_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, dev);
+ v3_hook_msr(vm, BASE_ADDR_MSR, read_apic_msr, write_apic_msr, apic_dev);
return 0;
}
