#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
typedef enum {INIT, SIPI, STARTED} ipi_state_t;
+struct apic_dev_state;
+
struct apic_state {
addr_t base_addr;
uint8_t int_svc_reg[32];
uint8_t int_en_reg[32];
uint8_t trig_mode_reg[32];
-
- uint32_t eoi;
- struct vm_device * icc_bus;
+ struct guest_info * core;
+
+ uint32_t eoi;
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, uint32_t id, struct vm_device * icc) {
+static void init_apic_state(struct apic_state * apic, uint32_t id) {
apic->base_addr = DEFAULT_BASE_ADDR;
if (id == 0) {
apic->lapic_id.val = id;
- apic->icc_bus = icc;
-
apic->ipi_state = INIT;
// The P6 has 6 LVT entries, so we set the value to (6-1)...
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);
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_mem_region * old_reg = v3_get_mem_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);
+ PrintDebug("apic %u: core %u: MSR write\n", apic->lapic_id.val, core->cpu_id);
if (old_reg == NULL) {
// uh oh...
v3_lock(apic->lock);
- v3_delete_mem_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) {
+ 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);
v3_unlock(apic->lock);
}
+
+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_
+ 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 (mda == 0xff) {
+ // always deliver broadcast
+ return 1;
+ }
+
+ if (dst_apic->dst_fmt.model == 0xf) {
+ return should_deliver_cluster_ipi(dst_core, dst_apic, mda);
+ } else if (dst_apic->dst_fmt.model == 0x0) {
+ return should_deliver_flat_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;
+ }
+}
+
+
+static int deliver_ipi(struct guest_info * core,
+ 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 0: //fixed
+ case 1: // lowest priority
+ PrintDebug("icc_bus: delivering IRQ to core %u\n", dst_core->cpu_id);
+
+ activate_apic_irq(dst_apic, vector);
+
+ if (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("icc_bus: non-local core, forcing it to exit\n");
+
+ v3_interrupt_cpu(core->vm_info, dst_core->cpu_id, 0);
+ }
+
+ break;
+ case 5: { //INIT
+
+ PrintDebug("icc_bus: 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) {
+ PrintError("icc_bus: Warning: core %u is not in INIT state (mode = %d), ignored\n",
+ dst_core->cpu_id, dst_core->cpu_mode);
+ // 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("icc_bus: INIT delivery done\n");
+
+ break;
+ }
+ case 6: { //SIPI
+
+ // Sanity check
+ if (dst_apic->ipi_state != SIPI) {
+ PrintError("icc_bus: core %u is not in SIPI state (mode = %d), ignored!\n",
+ dst_core->cpu_id, dst_core->cpu_mode);
+ 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("icc_bus: SIPI delivery (0x%x -> 0x%x:0x0) to core %u\n",
+ vec, 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
+
+ // As with INIT, we should not need to do anything else
+
+ PrintDebug("icc_bus: SIPI delivery done\n");
+
+ break;
+ }
+ case 2: // SMI
+ case 3: // reserved
+ case 4: // NMI
+ case 7: // ExtInt
+ default:
+ PrintError("IPI %d delivery is unsupported\n", del_mode);
+ return -1;
+ }
+
+ return 0;
+
+}
+
+
+static int route_ipi(struct guest_info * core, struct apic_dev_state * apic_dev,
+ struct apic_state * src_apic, uint32_t icr_val) {
+ struct int_cmd_reg * icr = (struct int_cmd_reg *)&icr_val;
+ struct apic_state * dest_apic = NULL;
+
+ PrintDebug("icc_bus: icc_bus=%p, src_apic=%u, icr_data=%llx, extirq=%u\n",
+ icc_bus, src_apic, icr_data, extirq);
+
+
+ // initial sanity checks
+ if (src_apic == NULL) {
+ PrintError("icc_bus: Apparently sending from unregistered apic id=%d\n",
+ src_apic->core->cpu_id);
+ return -1;
+ }
+
+
+ if ((icr->dst_mode == 0) && (icr->dst >= apic_dev->num_apics)) {
+ PrintError("icc_bus: Attempted send to unregistered apic id=%u\n",
+ icr->dst);
+ return -1;
+ }
+
+ dest_apic = &(apic_dev->apics[icr->dst]);
+
+
+ PrintDebug("icc_bus: IPI %s %u from %s %u to %s %s %u (icr=0x%llx, extirq=%u)\n",
+ deliverymode_str[icr->del_mode],
+ icr->vec,
+ (src_apic == state->ioapic_id) ? "ioapic" : "apic",
+ src_apic,
+ (icr->dst_mode == 0) ? "(physical)" : "(logical)",
+ shorthand_str[icr->dst_shorthand],
+ icr->dst,
+ icr->val,
+ extirq);
+
+
+ switch (icr->dst_shorthand) {
+
+ case 0: // no shorthand
+ if (icr->dst_mode == 0) {
+ // physical delivery
+
+ if (deliver_ipi(core, src_apic, dest_apic,
+ icr->vec, icr->del_mode) == -1) {
+ PrintError("Error: Could not deliver IPI\n");
+ return -1;
+ }
+
+ } else {
+ // logical delivery
+ 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("Error checking delivery mode\n");
+ return -1;
+ } else if (del_flag == 1) {
+ if (deliver_ipi(core, src_apic, dest_apic,
+ icr->vec, icr->del_mode) == -1) {
+ PrintError("Error: Could not deliver IPI\n");
+ return -1;
+ }
+ }
+ }
+ }
+
+ break;
+
+ case 1: // self
+
+ if (icr->dst_mode == 0) {
+ if (deliver_ipi(core, src_apic, src_apic, icr->vec, icr->del_mode) == -1) {
+ PrintError("Could not deliver IPI\n");
+ return -1;
+ }
+ } else {
+ // logical delivery
+ PrintError("icc_bus: use of logical delivery in self is not yet supported.\n");
+ return -1;
+ }
+ break;
+
+ case 2:
+ case 3: { // 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 == 2)) {
+ if (deliver_ipi(core, src_apic, dest_apic, icr->vec, icr->del_mode) == -1) {
+ PrintError("Error: Could not deliver IPI\n");
+ return -1;
+ }
+ }
+ }
+
+ break;
+ }
+ default:
+ PrintError("Error routing IPI, invalid Mode (%d)\n", icr->dst_shorthand);
+ return -1;
+ }
+
+
+ return 0;
+}
+
+
+
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;
*
*/
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;
case INT_CMD_LO_OFFSET:
apic->int_cmd.lo = op_val;
- // ICC???
PrintDebug("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 (v3_icc_send_ipi(apic->icc_bus, apic->lapic_id.val, apic->int_cmd.val, 0)==-1) {
+
+ if (route_ipi(core, apic_dev, apic, apic->int_cmd.val) == -1) {
+ PrintError("IPI Routing failure\n");
return -1;
}
+
break;
case INT_CMD_HI_OFFSET:
/* 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);
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;
+int v3_apic_raise_intr(struct v3_vm_info * vm, struct vm_device * dev,
+ uint32_t irq, uint32_t dst) {
+ struct apic_dev_state * apic_dev = (struct apic_dev_state *)(dev->private_data);
+ struct apic_state * apic = &(apic_dev->apics[dst]);
+
+ activate_apic_irq(apic, irq);
- return activate_apic_irq(apic, irq);
+ if (V3_Get_CPU() != dst) {
+ v3_interrupt_cpu(vm, dst, 0);
+ }
+
+ return 0;
}
-static int apic_begin_irq(struct guest_info * info, void * private_data, int irq) {
- struct apic_state * apic = (struct apic_state *)private_data;
+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;
/* Timer Functions */
-static void apic_update_time(struct guest_info * info,
+static void apic_update_time(struct guest_info * core,
uint64_t cpu_cycles, uint64_t cpu_freq,
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]);
+
// The 32 bit GCC runtime is a pile of shit
#ifdef __V3_64BIT__
uint64_t tmr_ticks = 0;
break;
default:
PrintError("apic %u: core %u: Invalid Timer Divider configuration\n",
- apic->lapic_id.val, info->cpu_id);
+ apic->lapic_id.val, core->cpu_id);
return;
}
apic->lapic_id.val, info->cpu_id,
apic->tmr_vec_tbl.tmr_mode, apic->tmr_init_cnt, shift_num);
- if (apic_intr_pending(info, priv_data)) {
+ if (apic_intr_pending(core, priv_data)) {
PrintDebug("apic %u: core %u: Overriding pending IRQ %d\n",
apic->lapic_id.val, info->cpu_id,
apic_get_intr_number(info, priv_data));
if (activate_internal_irq(apic, APIC_TMR_INT) == -1) {
PrintError("apic %u: core %u: Could not raise Timer interrupt\n",
- apic->lapic_id.val, info->cpu_id);
+ apic->lapic_id.val, core->cpu_id);
}
if (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_PERIODIC) {
.stop = NULL,
};
-static int apic_should_deliver_flat(struct guest_info * core, uint8_t mda, void * private_data)
-{
- struct apic_state * apic = (struct apic_state *)private_data;
- if (mda==0xff || // broadcast or
- (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",
- apic->lapic_id.val, core->cpu_id, mda, 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",
- apic->lapic_id.val, core->cpu_id, mda, apic->log_dst.dst_log_id);
- return 0;
- }
-}
-static int apic_should_deliver_cluster(struct guest_info * core, uint8_t mda, void * private_data)
-{
- struct apic_state * apic = (struct apic_state *)private_data;
- if (mda==0xff || // broadcast or
- ( ((mda & 0xf0) == (apic->log_dst.dst_log_id & 0xf0)) && // (I am in the cluster and
- ((mda & 0x0f) & (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",
- apic->lapic_id.val, core->cpu_id, mda, 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",
- apic->lapic_id.val, core->cpu_id, mda, apic->log_dst.dst_log_id);
- return 0;
- }
-}
-
-static int apic_should_deliver(struct guest_info * core, uint8_t mda, void *private_data)
-{
- struct apic_state * apic = (struct apic_state *)private_data;
- if (apic->dst_fmt.model == 0xf) {
- return apic_should_deliver_cluster(core, mda, private_data);
- } else if (apic->dst_fmt.model == 0x0) {
- return apic_should_deliver_flat(core, mda, private_data);
- } else {
- PrintError("apic %u core %u: invalid destination format register value 0x%x for logical mode delivery.\n", apic->lapic_id.val, core->cpu_id, apic->dst_fmt.model);
- return 0;
- }
-}
-
-static struct v3_icc_ops icc_ops = {
- .raise_intr = apic_raise_intr,
- .should_deliver = apic_should_deliver,
-};
static int apic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
- PrintDebug("apic: creating an APIC for each core\n");
char * dev_id = v3_cfg_val(cfg, "ID");
- char * icc_bus_id = v3_cfg_val(cfg, "bus");
- struct vm_device * icc = v3_find_dev(vm, icc_bus_id);
- int i;
+ struct apic_dev_state * apic_dev = NULL;
+ int i = 0;
- if (!icc) {
- PrintError("apic: Cannot find ICC Bus (%s)\n", icc_bus_id);
- 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
- // 0..num_cores-1 at num_cores is the ioapic (one only)
- 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(dev_id, &dev_ops, apic);
+ apic_dev->num_apics = vm->num_cores;
+
+ struct vm_device * dev = v3_allocate_device(dev_id, &dev_ops, apic_dev);
if (v3_attach_device(vm, dev) == -1) {
PrintError("apic: Could not attach device %s\n", dev_id);
for (i = 0; i < vm->num_cores; i++) {
+ struct apic_state * apic = &(apic_dev->apics[i]);
struct guest_info * core = &(vm->cores[i]);
- init_apic_state(&(apic[i]),i,icc);
-
- v3_register_intr_controller(core, &intr_ops, &(apic[i]));
+ apic->core = core;
- v3_add_timer(core, &timer_ops, &(apic[i]));
+ init_apic_state(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]));
+ v3_register_intr_controller(core, &intr_ops, apic_dev);
- v3_icc_register_apic(core, icc, i, &icc_ops, &(apic[i]));
+ v3_add_timer(core, &timer_ops, apic_dev);
- PrintDebug("apic %u: (setup device): done, my id is %u\n", i, apic[i].lapic_id.val);
+ 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 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\n",
- i, &(apic[i]), apic[i].lapic_id.val, apic[i].base_addr_msr.value);
+ i, apic, apic->lapic_id.val, apic->base_addr_msr.value);
}
+#endif
+
- PrintDebug("apic: priv_data is at %p\n", apic);
+ 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;
}
+++ /dev/null
-/*
- * This file is part of the Palacios Virtual Machine Monitor developed
- * by the V3VEE Project with funding from the United States National
- * Science Foundation and the Department of Energy.
- *
- * The V3VEE Project is a joint project between Northwestern University
- * and the University of New Mexico. You can find out more at
- * http://www.v3vee.org
- *
- * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
- * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
- * All rights reserved.
- *
- * Author: Jack Lange <jarusl@cs.northwestern.edu>
- *
- * This is free software. You are permitted to use,
- * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
- */
-
-#include <palacios/vmm_dev_mgr.h>
-#include <palacios/vmm_sprintf.h>
-#include <palacios/vm_guest.h>
-#include <devices/icc_bus.h>
-#include <devices/apic_regs.h>
-
-#define MAX_APICS 256
-
-#ifndef CONFIG_DEBUG_ICC_BUS
-#undef PrintDebug
-#define PrintDebug(fmt, args...)
-#endif
-
-
-void v3_force_exit(void *p) {
-#ifdef CONFIG_DEBUG_ICC_BUS
- struct guest_info *core=(struct guest_info *)p;
-#endif
- PrintDebug("core %u: Forced to exit!\n",core->cpu_id);
-}
-
-struct ipi_thunk_data {
- struct vm_device * target;
- uint64_t val;
-};
-
-
-
-struct apic_data {
- struct guest_info * core;
- struct v3_icc_ops * ops;
-
- void * priv_data;
- int present;
-};
-
-
-struct icc_bus_state {
- struct apic_data apics[MAX_APICS];
-
- uint32_t ioapic_id;
-};
-
-static struct v3_device_ops dev_ops = {
- .free = NULL,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
-};
-
-#ifdef CONFIG_DEBUG_ICC_BUS
-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
-
-
-static int deliver(uint32_t src_apic, struct apic_data *dest_apic, struct int_cmd_reg *icr, struct icc_bus_state * state, uint32_t extirq) {
-
- switch (icr->del_mode) {
-
- case 0: //fixed
- case 1: // lowest priority
- case 7: // ExtInt
- PrintDebug("icc_bus: delivering IRQ to core %u\n",dest_apic->core->cpu_id);
-
- dest_apic->ops->raise_intr(dest_apic->core,
- (icr->del_mode != 7) ? icr->vec : extirq,
- dest_apic->priv_data);
-
- if ((src_apic != state->ioapic_id) && (dest_apic->core->cpu_id != 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("icc_bus: non-local core, forcing it to exit\n");
-
- V3_Call_On_CPU(dest_apic->core->cpu_id, v3_force_exit, (void *)(dest_apic->core));
- // TODO: do what the print says
- }
- break;
-
- case 2: //SMI
- PrintError("icc_bus: SMI delivery is unsupported\n");
- return -1;
- break;
-
- case 3: //reserved
- PrintError("icc_bus: Reserved delivery mode 3 is unsupported\n");
- return -1;
- break;
-
- case 4: //NMI
- PrintError("icc_bus: NMI delivery is unsupported\n");
- return -1;
- break;
-
- case 5: { //INIT
- struct guest_info *core = dest_apic->core;
-
- PrintDebug("icc_bus: INIT delivery to core %u\n", core->cpu_id);
-
- // TODO: any APIC reset on dest core (shouldn't be needed, but not sure...)
-
- // Sanity check
- if (dest_apic->ipi_state != INIT) {
- PrintError("icc_bus: Warning: core %u is not in INIT state (mode = %d), ignored\n",
- core->cpu_id, core->cpu_mode);
- // Only a warning, since INIT INIT SIPI is common
- break;
- }
-
- // We transition the target core to SIPI state
- dest_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("icc_bus: INIT delivery done\n");
-
- }
- break;
-
- case 6: { //SIPI
- struct guest_info *core = dest_apic->core;
-
- // Sanity check
- if (dest_apic->ipi_state != SIPI) {
- PrintError("icc_bus: core %u is not in SIPI state (mode = %d), ignored!\n",core->cpu_id, core->cpu_mode);
- 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
- //
- core->rip = 0;
- core->segments.cs.selector = icr->vec << 8;
- core->segments.cs.limit = 0xffff;
- core->segments.cs.base = icr->vec << 12;
-
- PrintDebug("icc_bus: SIPI delivery (0x%x -> 0x%x:0x0) to core %u\n",
- icr->vec, core->segments.cs.selector, core->cpu_id);
- // Maybe need to adjust the APIC?
-
- // We transition the target core to SIPI state
- core->core_run_state = CORE_RUNNING; // note: locking should not be needed here
-
- // As with INIT, we should not need to do anything else
-
- PrintDebug("icc_bus: SIPI delivery done\n");
-
- }
- break;
- }
-
- return 0;
-}
-
-
-//
-// icr_data contains interrupt vector *except* for ext_int
-// in which case it is given via irq
-//
-
-int v3_icc_send_ipi(struct vm_device * icc_bus, uint32_t src_apic, uint64_t icr_data, uint32_t extirq) {
-
- struct int_cmd_reg *icr = (struct int_cmd_reg *)&icr_data;
-
- struct icc_bus_state * state = (struct icc_bus_state *)icc_bus->private_data;
- struct apic_data * dest_apic = NULL;
- PrintDebug("icc_bus: icc_bus=%p, src_apic=%u, icr_data=%llx, extirq=%u\n",
- icc_bus, src_apic, icr_data, extirq);
-
- // initial sanity checks
- if ((src_apic >= MAX_APICS) ||
- ((state->apics[src_apic].present == 0) &&
- (src_apic != state->ioapic_id))) {
- PrintError("icc_bus: Apparently sending from unregistered apic id=%u\n",src_apic);
- return -1;
- }
-
-
- if ((icr->dst_mode == 0) && (state->apics[icr->dst].present == 0)) {
- PrintError("icc_bus: Attempted send to unregistered apic id=%u\n", icr->dst);
- return -1;
- }
-
- dest_apic = &(state->apics[icr->dst]);
-
-
- PrintDebug("icc_bus: IPI %s %u from %s %u to %s %s %u (icr=0x%llx, extirq=%u)\n",
- deliverymode_str[icr->del_mode], icr->vec,
- src_apic==state->ioapic_id ? "ioapic" : "apic",
- src_apic,
- icr->dst_mode==0 ? "(physical)" : "(logical)",
- shorthand_str[icr->dst_shorthand], icr->dst,icr->val,
- extirq);
-
- /*
-
- if (icr->dst==state->ioapic_id) {
- PrintError("icc_bus: Attempted send to ioapic ignored\n");
- return -1;
- }
- */
-
-
-
- switch (icr->dst_shorthand) {
-
- case 0: // no shorthand
-
- if (icr->dst_mode==0) {
- // physical delivery
- struct apic_data * dest_apic = &(state->apics[icr->dst]);
- if (deliver(src_apic,dest_apic,icr,state,extirq)) {
- return -1;
- }
- } else {
- // logical delivery
- int i;
- uint8_t mda = icr->dst;
- for (i=0;i<MAX_APICS;i++) {
- struct apic_data *dest_apic=&(state->apics[i]);
- if (dest_apic->present &&
- dest_apic->ops->should_deliver(dest_apic->core,
- mda,
- dest_apic->priv_data)) {
- if (deliver(src_apic,dest_apic,icr,state,extirq)) {
- return -1;
- }
- }
- }
- }
-
- break;
-
- case 1: // self
-
- if (icr->dst_mode==0) {
- // physical delivery
- if (icr->dst==state->ioapic_id) {
- PrintError("icc_bus: ioapic attempting to send to itself\n");
- return -1;
- }
- struct apic_data *dest_apic=&(state->apics[src_apic]);
- if (deliver(src_apic,dest_apic,icr,state,extirq)) {
- return -1;
- }
- } else {
- // logical delivery
- PrintError("icc_bus: use of logical delivery in self is not yet supported.\n");
-
- return -1;
- }
- break;
-
- case 2:
-
- case 3: { // 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<MAX_APICS;i++) {
- struct apic_data *dest_apic=&(state->apics[i]);
- if (dest_apic->present && (i!=src_apic || icr->dst_shorthand==2)) {
- if (deliver(src_apic,dest_apic,icr,state,extirq)) {
- return -1;
- }
- }
- }
- }
- break;
-
- default:
- return -1;
- }
-
-
- return 0;
-}
-
-
-
-/* THIS IS A BIG ASSUMPTION: APIC PHYSID == LOGID == CORENUM */
-
-int v3_icc_register_apic(struct guest_info * core, struct vm_device * icc_bus,
- uint8_t apic_num, struct v3_icc_ops * ops, void * priv_data) {
- struct icc_bus_state * icc = (struct icc_bus_state *)icc_bus->private_data;
- struct apic_data * apic = &(icc->apics[apic_num]);
-
- if (apic->present == 1) {
- PrintError("icc_bus: Attempt to re-register apic %u\n", apic_num);
- return -1;
- }
-
- apic->present = 1;
- apic->priv_data = priv_data;
- apic->core = core;
- apic->ops = ops;
-
- PrintDebug("icc_bus: Registered apic %u\n", apic_num);
-
- return 0;
-}
-
-
-int v3_icc_register_ioapic(struct v3_vm_info *vm, struct vm_device * icc_bus, uint8_t apic_num)
-{
- struct icc_bus_state * icc = (struct icc_bus_state *)icc_bus->private_data;
-
- if (icc->ioapic_id) {
- PrintError("icc_bus: Attempt to register a second ioapic!\n");
- return -1;
- }
-
- icc->ioapic_id=apic_num;
-
- PrintDebug("icc_bus: Registered ioapic %u\n", apic_num);
-
-
- return 0;
-}
-
-
-static int icc_bus_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
- PrintDebug("icc_bus: Creating ICC_BUS\n");
-
- char * dev_id = v3_cfg_val(cfg, "ID");
-
- struct icc_bus_state * icc_bus = (struct icc_bus_state *)V3_Malloc(sizeof(struct icc_bus_state));
- memset(icc_bus, 0, sizeof(struct icc_bus_state));
-
- struct vm_device * dev = v3_allocate_device(dev_id, &dev_ops, icc_bus);
-
- if (v3_attach_device(vm, dev) == -1) {
- PrintError("icc_bus: Could not attach device %s\n", dev_id);
- return -1;
- }
-
- return 0;
-}
-
-
-
-device_register("ICC_BUS", icc_bus_init)
