diff options
Diffstat (limited to 'src/hw/i386/kvm')
| -rw-r--r-- | src/hw/i386/kvm/Makefile.objs | 1 | ||||
| -rw-r--r-- | src/hw/i386/kvm/apic.c | 218 | ||||
| -rw-r--r-- | src/hw/i386/kvm/clock.c | 195 | ||||
| -rw-r--r-- | src/hw/i386/kvm/i8254.c | 335 | ||||
| -rw-r--r-- | src/hw/i386/kvm/i8259.c | 162 | ||||
| -rw-r--r-- | src/hw/i386/kvm/ioapic.c | 178 | ||||
| -rw-r--r-- | src/hw/i386/kvm/pci-assign.c | 1900 |
7 files changed, 2989 insertions, 0 deletions
diff --git a/src/hw/i386/kvm/Makefile.objs b/src/hw/i386/kvm/Makefile.objs new file mode 100644 index 0000000..d8bce20 --- /dev/null +++ b/src/hw/i386/kvm/Makefile.objs @@ -0,0 +1 @@ +obj-y += clock.o apic.o i8259.o ioapic.o i8254.o pci-assign.o diff --git a/src/hw/i386/kvm/apic.c b/src/hw/i386/kvm/apic.c new file mode 100644 index 0000000..5b47056 --- /dev/null +++ b/src/hw/i386/kvm/apic.c @@ -0,0 +1,218 @@ +/* + * KVM in-kernel APIC support + * + * Copyright (c) 2011 Siemens AG + * + * Authors: + * Jan Kiszka <jan.kiszka@siemens.com> + * + * This work is licensed under the terms of the GNU GPL version 2. + * See the COPYING file in the top-level directory. + */ +#include "hw/i386/apic_internal.h" +#include "hw/pci/msi.h" +#include "sysemu/kvm.h" + +static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic, + int reg_id, uint32_t val) +{ + *((uint32_t *)(kapic->regs + (reg_id << 4))) = val; +} + +static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic, + int reg_id) +{ + return *((uint32_t *)(kapic->regs + (reg_id << 4))); +} + +void kvm_put_apic_state(DeviceState *dev, struct kvm_lapic_state *kapic) +{ + APICCommonState *s = APIC_COMMON(dev); + int i; + + memset(kapic, 0, sizeof(*kapic)); + kvm_apic_set_reg(kapic, 0x2, s->id << 24); + kvm_apic_set_reg(kapic, 0x8, s->tpr); + kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24); + kvm_apic_set_reg(kapic, 0xe, s->dest_mode << 28 | 0x0fffffff); + kvm_apic_set_reg(kapic, 0xf, s->spurious_vec); + for (i = 0; i < 8; i++) { + kvm_apic_set_reg(kapic, 0x10 + i, s->isr[i]); + kvm_apic_set_reg(kapic, 0x18 + i, s->tmr[i]); + kvm_apic_set_reg(kapic, 0x20 + i, s->irr[i]); + } + kvm_apic_set_reg(kapic, 0x28, s->esr); + kvm_apic_set_reg(kapic, 0x30, s->icr[0]); + kvm_apic_set_reg(kapic, 0x31, s->icr[1]); + for (i = 0; i < APIC_LVT_NB; i++) { + kvm_apic_set_reg(kapic, 0x32 + i, s->lvt[i]); + } + kvm_apic_set_reg(kapic, 0x38, s->initial_count); + kvm_apic_set_reg(kapic, 0x3e, s->divide_conf); +} + +void kvm_get_apic_state(DeviceState *dev, struct kvm_lapic_state *kapic) +{ + APICCommonState *s = APIC_COMMON(dev); + int i, v; + + s->id = kvm_apic_get_reg(kapic, 0x2) >> 24; + s->tpr = kvm_apic_get_reg(kapic, 0x8); + s->arb_id = kvm_apic_get_reg(kapic, 0x9); + s->log_dest = kvm_apic_get_reg(kapic, 0xd) >> 24; + s->dest_mode = kvm_apic_get_reg(kapic, 0xe) >> 28; + s->spurious_vec = kvm_apic_get_reg(kapic, 0xf); + for (i = 0; i < 8; i++) { + s->isr[i] = kvm_apic_get_reg(kapic, 0x10 + i); + s->tmr[i] = kvm_apic_get_reg(kapic, 0x18 + i); + s->irr[i] = kvm_apic_get_reg(kapic, 0x20 + i); + } + s->esr = kvm_apic_get_reg(kapic, 0x28); + s->icr[0] = kvm_apic_get_reg(kapic, 0x30); + s->icr[1] = kvm_apic_get_reg(kapic, 0x31); + for (i = 0; i < APIC_LVT_NB; i++) { + s->lvt[i] = kvm_apic_get_reg(kapic, 0x32 + i); + } + s->initial_count = kvm_apic_get_reg(kapic, 0x38); + s->divide_conf = kvm_apic_get_reg(kapic, 0x3e); + + v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4); + s->count_shift = (v + 1) & 7; + + s->initial_count_load_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + apic_next_timer(s, s->initial_count_load_time); +} + +static void kvm_apic_set_base(APICCommonState *s, uint64_t val) +{ + s->apicbase = val; +} + +static void kvm_apic_set_tpr(APICCommonState *s, uint8_t val) +{ + s->tpr = (val & 0x0f) << 4; +} + +static uint8_t kvm_apic_get_tpr(APICCommonState *s) +{ + return s->tpr >> 4; +} + +static void kvm_apic_enable_tpr_reporting(APICCommonState *s, bool enable) +{ + struct kvm_tpr_access_ctl ctl = { + .enabled = enable + }; + + kvm_vcpu_ioctl(CPU(s->cpu), KVM_TPR_ACCESS_REPORTING, &ctl); +} + +static void kvm_apic_vapic_base_update(APICCommonState *s) +{ + struct kvm_vapic_addr vapid_addr = { + .vapic_addr = s->vapic_paddr, + }; + int ret; + + ret = kvm_vcpu_ioctl(CPU(s->cpu), KVM_SET_VAPIC_ADDR, &vapid_addr); + if (ret < 0) { + fprintf(stderr, "KVM: setting VAPIC address failed (%s)\n", + strerror(-ret)); + abort(); + } +} + +static void do_inject_external_nmi(void *data) +{ + APICCommonState *s = data; + CPUState *cpu = CPU(s->cpu); + uint32_t lvt; + int ret; + + cpu_synchronize_state(cpu); + + lvt = s->lvt[APIC_LVT_LINT1]; + if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) { + ret = kvm_vcpu_ioctl(cpu, KVM_NMI); + if (ret < 0) { + fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n", + strerror(-ret)); + } + } +} + +static void kvm_apic_external_nmi(APICCommonState *s) +{ + run_on_cpu(CPU(s->cpu), do_inject_external_nmi, s); +} + +static uint64_t kvm_apic_mem_read(void *opaque, hwaddr addr, + unsigned size) +{ + return ~(uint64_t)0; +} + +static void kvm_apic_mem_write(void *opaque, hwaddr addr, + uint64_t data, unsigned size) +{ + MSIMessage msg = { .address = addr, .data = data }; + int ret; + + ret = kvm_irqchip_send_msi(kvm_state, msg); + if (ret < 0) { + fprintf(stderr, "KVM: injection failed, MSI lost (%s)\n", + strerror(-ret)); + } +} + +static const MemoryRegionOps kvm_apic_io_ops = { + .read = kvm_apic_mem_read, + .write = kvm_apic_mem_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static void kvm_apic_reset(APICCommonState *s) +{ + /* Not used by KVM, which uses the CPU mp_state instead. */ + s->wait_for_sipi = 0; +} + +static void kvm_apic_realize(DeviceState *dev, Error **errp) +{ + APICCommonState *s = APIC_COMMON(dev); + + memory_region_init_io(&s->io_memory, NULL, &kvm_apic_io_ops, s, "kvm-apic-msi", + APIC_SPACE_SIZE); + + if (kvm_has_gsi_routing()) { + msi_supported = true; + } +} + +static void kvm_apic_class_init(ObjectClass *klass, void *data) +{ + APICCommonClass *k = APIC_COMMON_CLASS(klass); + + k->realize = kvm_apic_realize; + k->reset = kvm_apic_reset; + k->set_base = kvm_apic_set_base; + k->set_tpr = kvm_apic_set_tpr; + k->get_tpr = kvm_apic_get_tpr; + k->enable_tpr_reporting = kvm_apic_enable_tpr_reporting; + k->vapic_base_update = kvm_apic_vapic_base_update; + k->external_nmi = kvm_apic_external_nmi; +} + +static const TypeInfo kvm_apic_info = { + .name = "kvm-apic", + .parent = TYPE_APIC_COMMON, + .instance_size = sizeof(APICCommonState), + .class_init = kvm_apic_class_init, +}; + +static void kvm_apic_register_types(void) +{ + type_register_static(&kvm_apic_info); +} + +type_init(kvm_apic_register_types) diff --git a/src/hw/i386/kvm/clock.c b/src/hw/i386/kvm/clock.c new file mode 100644 index 0000000..0593a3f --- /dev/null +++ b/src/hw/i386/kvm/clock.c @@ -0,0 +1,195 @@ +/* + * QEMU KVM support, paravirtual clock device + * + * Copyright (C) 2011 Siemens AG + * + * Authors: + * Jan Kiszka <jan.kiszka@siemens.com> + * + * This work is licensed under the terms of the GNU GPL version 2. + * See the COPYING file in the top-level directory. + * + * Contributions after 2012-01-13 are licensed under the terms of the + * GNU GPL, version 2 or (at your option) any later version. + */ + +#include "qemu-common.h" +#include "qemu/host-utils.h" +#include "sysemu/sysemu.h" +#include "sysemu/kvm.h" +#include "kvm_i386.h" +#include "hw/sysbus.h" +#include "hw/kvm/clock.h" + +#include <linux/kvm.h> +#include <linux/kvm_para.h> + +#define TYPE_KVM_CLOCK "kvmclock" +#define KVM_CLOCK(obj) OBJECT_CHECK(KVMClockState, (obj), TYPE_KVM_CLOCK) + +typedef struct KVMClockState { + /*< private >*/ + SysBusDevice busdev; + /*< public >*/ + + uint64_t clock; + bool clock_valid; +} KVMClockState; + +struct pvclock_vcpu_time_info { + uint32_t version; + uint32_t pad0; + uint64_t tsc_timestamp; + uint64_t system_time; + uint32_t tsc_to_system_mul; + int8_t tsc_shift; + uint8_t flags; + uint8_t pad[2]; +} __attribute__((__packed__)); /* 32 bytes */ + +static uint64_t kvmclock_current_nsec(KVMClockState *s) +{ + CPUState *cpu = first_cpu; + CPUX86State *env = cpu->env_ptr; + hwaddr kvmclock_struct_pa = env->system_time_msr & ~1ULL; + uint64_t migration_tsc = env->tsc; + struct pvclock_vcpu_time_info time; + uint64_t delta; + uint64_t nsec_lo; + uint64_t nsec_hi; + uint64_t nsec; + + if (!(env->system_time_msr & 1ULL)) { + /* KVM clock not active */ + return 0; + } + + cpu_physical_memory_read(kvmclock_struct_pa, &time, sizeof(time)); + + assert(time.tsc_timestamp <= migration_tsc); + delta = migration_tsc - time.tsc_timestamp; + if (time.tsc_shift < 0) { + delta >>= -time.tsc_shift; + } else { + delta <<= time.tsc_shift; + } + + mulu64(&nsec_lo, &nsec_hi, delta, time.tsc_to_system_mul); + nsec = (nsec_lo >> 32) | (nsec_hi << 32); + return nsec + time.system_time; +} + +static void kvmclock_vm_state_change(void *opaque, int running, + RunState state) +{ + KVMClockState *s = opaque; + CPUState *cpu; + int cap_clock_ctrl = kvm_check_extension(kvm_state, KVM_CAP_KVMCLOCK_CTRL); + int ret; + + if (running) { + struct kvm_clock_data data = {}; + uint64_t time_at_migration = kvmclock_current_nsec(s); + + s->clock_valid = false; + + /* We can't rely on the migrated clock value, just discard it */ + if (time_at_migration) { + s->clock = time_at_migration; + } + + data.clock = s->clock; + ret = kvm_vm_ioctl(kvm_state, KVM_SET_CLOCK, &data); + if (ret < 0) { + fprintf(stderr, "KVM_SET_CLOCK failed: %s\n", strerror(ret)); + abort(); + } + + if (!cap_clock_ctrl) { + return; + } + CPU_FOREACH(cpu) { + ret = kvm_vcpu_ioctl(cpu, KVM_KVMCLOCK_CTRL, 0); + if (ret) { + if (ret != -EINVAL) { + fprintf(stderr, "%s: %s\n", __func__, strerror(-ret)); + } + return; + } + } + } else { + struct kvm_clock_data data; + int ret; + + if (s->clock_valid) { + return; + } + + kvm_synchronize_all_tsc(); + + ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data); + if (ret < 0) { + fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret)); + abort(); + } + s->clock = data.clock; + + /* + * If the VM is stopped, declare the clock state valid to + * avoid re-reading it on next vmsave (which would return + * a different value). Will be reset when the VM is continued. + */ + s->clock_valid = true; + } +} + +static void kvmclock_realize(DeviceState *dev, Error **errp) +{ + KVMClockState *s = KVM_CLOCK(dev); + + qemu_add_vm_change_state_handler(kvmclock_vm_state_change, s); +} + +static const VMStateDescription kvmclock_vmsd = { + .name = "kvmclock", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT64(clock, KVMClockState), + VMSTATE_END_OF_LIST() + } +}; + +static void kvmclock_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = kvmclock_realize; + dc->vmsd = &kvmclock_vmsd; +} + +static const TypeInfo kvmclock_info = { + .name = TYPE_KVM_CLOCK, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(KVMClockState), + .class_init = kvmclock_class_init, +}; + +/* Note: Must be called after VCPU initialization. */ +void kvmclock_create(void) +{ + X86CPU *cpu = X86_CPU(first_cpu); + + if (kvm_enabled() && + cpu->env.features[FEAT_KVM] & ((1ULL << KVM_FEATURE_CLOCKSOURCE) | + (1ULL << KVM_FEATURE_CLOCKSOURCE2))) { + sysbus_create_simple(TYPE_KVM_CLOCK, -1, NULL); + } +} + +static void kvmclock_register_types(void) +{ + type_register_static(&kvmclock_info); +} + +type_init(kvmclock_register_types) diff --git a/src/hw/i386/kvm/i8254.c b/src/hw/i386/kvm/i8254.c new file mode 100644 index 0000000..90eea10 --- /dev/null +++ b/src/hw/i386/kvm/i8254.c @@ -0,0 +1,335 @@ +/* + * KVM in-kernel PIT (i8254) support + * + * Copyright (c) 2003-2004 Fabrice Bellard + * Copyright (c) 2012 Jan Kiszka, Siemens AG + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/timer.h" +#include "sysemu/sysemu.h" +#include "hw/timer/i8254.h" +#include "hw/timer/i8254_internal.h" +#include "sysemu/kvm.h" + +#define KVM_PIT_REINJECT_BIT 0 + +#define CALIBRATION_ROUNDS 3 + +#define KVM_PIT(obj) OBJECT_CHECK(KVMPITState, (obj), TYPE_KVM_I8254) +#define KVM_PIT_CLASS(class) \ + OBJECT_CLASS_CHECK(KVMPITClass, (class), TYPE_KVM_I8254) +#define KVM_PIT_GET_CLASS(obj) \ + OBJECT_GET_CLASS(KVMPITClass, (obj), TYPE_KVM_I8254) + +typedef struct KVMPITState { + PITCommonState parent_obj; + + LostTickPolicy lost_tick_policy; + bool vm_stopped; + int64_t kernel_clock_offset; +} KVMPITState; + +typedef struct KVMPITClass { + PITCommonClass parent_class; + + DeviceRealize parent_realize; +} KVMPITClass; + +static int64_t abs64(int64_t v) +{ + return v < 0 ? -v : v; +} + +static void kvm_pit_update_clock_offset(KVMPITState *s) +{ + int64_t offset, clock_offset; + struct timespec ts; + int i; + + /* + * Measure the delta between CLOCK_MONOTONIC, the base used for + * kvm_pit_channel_state::count_load_time, and QEMU_CLOCK_VIRTUAL. Take the + * minimum of several samples to filter out scheduling noise. + */ + clock_offset = INT64_MAX; + for (i = 0; i < CALIBRATION_ROUNDS; i++) { + offset = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + clock_gettime(CLOCK_MONOTONIC, &ts); + offset -= ts.tv_nsec; + offset -= (int64_t)ts.tv_sec * 1000000000; + if (abs64(offset) < abs64(clock_offset)) { + clock_offset = offset; + } + } + s->kernel_clock_offset = clock_offset; +} + +static void kvm_pit_get(PITCommonState *pit) +{ + KVMPITState *s = KVM_PIT(pit); + struct kvm_pit_state2 kpit; + struct kvm_pit_channel_state *kchan; + struct PITChannelState *sc; + int i, ret; + + /* No need to re-read the state if VM is stopped. */ + if (s->vm_stopped) { + return; + } + + if (kvm_has_pit_state2()) { + ret = kvm_vm_ioctl(kvm_state, KVM_GET_PIT2, &kpit); + if (ret < 0) { + fprintf(stderr, "KVM_GET_PIT2 failed: %s\n", strerror(ret)); + abort(); + } + pit->channels[0].irq_disabled = kpit.flags & KVM_PIT_FLAGS_HPET_LEGACY; + } else { + /* + * kvm_pit_state2 is superset of kvm_pit_state struct, + * so we can use it for KVM_GET_PIT as well. + */ + ret = kvm_vm_ioctl(kvm_state, KVM_GET_PIT, &kpit); + if (ret < 0) { + fprintf(stderr, "KVM_GET_PIT failed: %s\n", strerror(ret)); + abort(); + } + } + for (i = 0; i < 3; i++) { + kchan = &kpit.channels[i]; + sc = &pit->channels[i]; + sc->count = kchan->count; + sc->latched_count = kchan->latched_count; + sc->count_latched = kchan->count_latched; + sc->status_latched = kchan->status_latched; + sc->status = kchan->status; + sc->read_state = kchan->read_state; + sc->write_state = kchan->write_state; + sc->write_latch = kchan->write_latch; + sc->rw_mode = kchan->rw_mode; + sc->mode = kchan->mode; + sc->bcd = kchan->bcd; + sc->gate = kchan->gate; + sc->count_load_time = kchan->count_load_time + s->kernel_clock_offset; + } + + sc = &pit->channels[0]; + sc->next_transition_time = + pit_get_next_transition_time(sc, sc->count_load_time); +} + +static void kvm_pit_put(PITCommonState *pit) +{ + KVMPITState *s = KVM_PIT(pit); + struct kvm_pit_state2 kpit = {}; + struct kvm_pit_channel_state *kchan; + struct PITChannelState *sc; + int i, ret; + + /* The offset keeps changing as long as the VM is stopped. */ + if (s->vm_stopped) { + kvm_pit_update_clock_offset(s); + } + + kpit.flags = pit->channels[0].irq_disabled ? KVM_PIT_FLAGS_HPET_LEGACY : 0; + for (i = 0; i < 3; i++) { + kchan = &kpit.channels[i]; + sc = &pit->channels[i]; + kchan->count = sc->count; + kchan->latched_count = sc->latched_count; + kchan->count_latched = sc->count_latched; + kchan->status_latched = sc->status_latched; + kchan->status = sc->status; + kchan->read_state = sc->read_state; + kchan->write_state = sc->write_state; + kchan->write_latch = sc->write_latch; + kchan->rw_mode = sc->rw_mode; + kchan->mode = sc->mode; + kchan->bcd = sc->bcd; + kchan->gate = sc->gate; + kchan->count_load_time = sc->count_load_time - s->kernel_clock_offset; + } + + ret = kvm_vm_ioctl(kvm_state, + kvm_has_pit_state2() ? KVM_SET_PIT2 : KVM_SET_PIT, + &kpit); + if (ret < 0) { + fprintf(stderr, "%s failed: %s\n", + kvm_has_pit_state2() ? "KVM_SET_PIT2" : "KVM_SET_PIT", + strerror(ret)); + abort(); + } +} + +static void kvm_pit_set_gate(PITCommonState *s, PITChannelState *sc, int val) +{ + kvm_pit_get(s); + + switch (sc->mode) { + default: + case 0: + case 4: + /* XXX: just disable/enable counting */ + break; + case 1: + case 2: + case 3: + case 5: + if (sc->gate < val) { + /* restart counting on rising edge */ + sc->count_load_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + } + break; + } + sc->gate = val; + + kvm_pit_put(s); +} + +static void kvm_pit_get_channel_info(PITCommonState *s, PITChannelState *sc, + PITChannelInfo *info) +{ + kvm_pit_get(s); + + pit_get_channel_info_common(s, sc, info); +} + +static void kvm_pit_reset(DeviceState *dev) +{ + PITCommonState *s = PIT_COMMON(dev); + + pit_reset_common(s); + + kvm_pit_put(s); +} + +static void kvm_pit_irq_control(void *opaque, int n, int enable) +{ + PITCommonState *pit = opaque; + PITChannelState *s = &pit->channels[0]; + + kvm_pit_get(pit); + + s->irq_disabled = !enable; + + kvm_pit_put(pit); +} + +static void kvm_pit_vm_state_change(void *opaque, int running, + RunState state) +{ + KVMPITState *s = opaque; + + if (running) { + kvm_pit_update_clock_offset(s); + kvm_pit_put(PIT_COMMON(s)); + s->vm_stopped = false; + } else { + kvm_pit_update_clock_offset(s); + kvm_pit_get(PIT_COMMON(s)); + s->vm_stopped = true; + } +} + +static void kvm_pit_realizefn(DeviceState *dev, Error **errp) +{ + PITCommonState *pit = PIT_COMMON(dev); + KVMPITClass *kpc = KVM_PIT_GET_CLASS(dev); + KVMPITState *s = KVM_PIT(pit); + struct kvm_pit_config config = { + .flags = 0, + }; + int ret; + + if (kvm_check_extension(kvm_state, KVM_CAP_PIT2)) { + ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_PIT2, &config); + } else { + ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_PIT); + } + if (ret < 0) { + error_setg(errp, "Create kernel PIC irqchip failed: %s", + strerror(ret)); + return; + } + switch (s->lost_tick_policy) { + case LOST_TICK_POLICY_DELAY: + break; /* enabled by default */ + case LOST_TICK_POLICY_DISCARD: + if (kvm_check_extension(kvm_state, KVM_CAP_REINJECT_CONTROL)) { + struct kvm_reinject_control control = { .pit_reinject = 0 }; + + ret = kvm_vm_ioctl(kvm_state, KVM_REINJECT_CONTROL, &control); + if (ret < 0) { + error_setg(errp, + "Can't disable in-kernel PIT reinjection: %s", + strerror(ret)); + return; + } + } + break; + default: + error_setg(errp, "Lost tick policy not supported."); + return; + } + + memory_region_init_reservation(&pit->ioports, NULL, "kvm-pit", 4); + + qdev_init_gpio_in(dev, kvm_pit_irq_control, 1); + + qemu_add_vm_change_state_handler(kvm_pit_vm_state_change, s); + + kpc->parent_realize(dev, errp); +} + +static Property kvm_pit_properties[] = { + DEFINE_PROP_UINT32("iobase", PITCommonState, iobase, -1), + DEFINE_PROP_LOSTTICKPOLICY("lost_tick_policy", KVMPITState, + lost_tick_policy, LOST_TICK_POLICY_DELAY), + DEFINE_PROP_END_OF_LIST(), +}; + +static void kvm_pit_class_init(ObjectClass *klass, void *data) +{ + KVMPITClass *kpc = KVM_PIT_CLASS(klass); + PITCommonClass *k = PIT_COMMON_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + kpc->parent_realize = dc->realize; + dc->realize = kvm_pit_realizefn; + k->set_channel_gate = kvm_pit_set_gate; + k->get_channel_info = kvm_pit_get_channel_info; + dc->reset = kvm_pit_reset; + dc->props = kvm_pit_properties; +} + +static const TypeInfo kvm_pit_info = { + .name = TYPE_KVM_I8254, + .parent = TYPE_PIT_COMMON, + .instance_size = sizeof(KVMPITState), + .class_init = kvm_pit_class_init, + .class_size = sizeof(KVMPITClass), +}; + +static void kvm_pit_register(void) +{ + type_register_static(&kvm_pit_info); +} + +type_init(kvm_pit_register) diff --git a/src/hw/i386/kvm/i8259.c b/src/hw/i386/kvm/i8259.c new file mode 100644 index 0000000..53e3ca8 --- /dev/null +++ b/src/hw/i386/kvm/i8259.c @@ -0,0 +1,162 @@ +/* + * KVM in-kernel PIC (i8259) support + * + * Copyright (c) 2011 Siemens AG + * + * Authors: + * Jan Kiszka <jan.kiszka@siemens.com> + * + * This work is licensed under the terms of the GNU GPL version 2. + * See the COPYING file in the top-level directory. + */ +#include "hw/isa/i8259_internal.h" +#include "hw/i386/apic_internal.h" +#include "sysemu/kvm.h" + +#define TYPE_KVM_I8259 "kvm-i8259" +#define KVM_PIC_CLASS(class) \ + OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259) +#define KVM_PIC_GET_CLASS(obj) \ + OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259) + +/** + * KVMPICClass: + * @parent_realize: The parent's realizefn. + */ +typedef struct KVMPICClass { + PICCommonClass parent_class; + + DeviceRealize parent_realize; +} KVMPICClass; + +static void kvm_pic_get(PICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_pic_state *kpic; + int ret; + + chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; + ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); + if (ret < 0) { + fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); + abort(); + } + + kpic = &chip.chip.pic; + + s->last_irr = kpic->last_irr; + s->irr = kpic->irr; + s->imr = kpic->imr; + s->isr = kpic->isr; + s->priority_add = kpic->priority_add; + s->irq_base = kpic->irq_base; + s->read_reg_select = kpic->read_reg_select; + s->poll = kpic->poll; + s->special_mask = kpic->special_mask; + s->init_state = kpic->init_state; + s->auto_eoi = kpic->auto_eoi; + s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; + s->special_fully_nested_mode = kpic->special_fully_nested_mode; + s->init4 = kpic->init4; + s->elcr = kpic->elcr; + s->elcr_mask = kpic->elcr_mask; +} + +static void kvm_pic_put(PICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_pic_state *kpic; + int ret; + + chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; + + kpic = &chip.chip.pic; + + kpic->last_irr = s->last_irr; + kpic->irr = s->irr; + kpic->imr = s->imr; + kpic->isr = s->isr; + kpic->priority_add = s->priority_add; + kpic->irq_base = s->irq_base; + kpic->read_reg_select = s->read_reg_select; + kpic->poll = s->poll; + kpic->special_mask = s->special_mask; + kpic->init_state = s->init_state; + kpic->auto_eoi = s->auto_eoi; + kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; + kpic->special_fully_nested_mode = s->special_fully_nested_mode; + kpic->init4 = s->init4; + kpic->elcr = s->elcr; + kpic->elcr_mask = s->elcr_mask; + + ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); + if (ret < 0) { + fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); + abort(); + } +} + +static void kvm_pic_reset(DeviceState *dev) +{ + PICCommonState *s = PIC_COMMON(dev); + + s->elcr = 0; + pic_reset_common(s); + + kvm_pic_put(s); +} + +static void kvm_pic_set_irq(void *opaque, int irq, int level) +{ + int delivered; + + delivered = kvm_set_irq(kvm_state, irq, level); + apic_report_irq_delivered(delivered); +} + +static void kvm_pic_realize(DeviceState *dev, Error **errp) +{ + PICCommonState *s = PIC_COMMON(dev); + KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev); + + memory_region_init_reservation(&s->base_io, NULL, "kvm-pic", 2); + memory_region_init_reservation(&s->elcr_io, NULL, "kvm-elcr", 1); + + kpc->parent_realize(dev, errp); +} + +qemu_irq *kvm_i8259_init(ISABus *bus) +{ + i8259_init_chip(TYPE_KVM_I8259, bus, true); + i8259_init_chip(TYPE_KVM_I8259, bus, false); + + return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); +} + +static void kvm_i8259_class_init(ObjectClass *klass, void *data) +{ + KVMPICClass *kpc = KVM_PIC_CLASS(klass); + PICCommonClass *k = PIC_COMMON_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->reset = kvm_pic_reset; + kpc->parent_realize = dc->realize; + dc->realize = kvm_pic_realize; + k->pre_save = kvm_pic_get; + k->post_load = kvm_pic_put; +} + +static const TypeInfo kvm_i8259_info = { + .name = TYPE_KVM_I8259, + .parent = TYPE_PIC_COMMON, + .instance_size = sizeof(PICCommonState), + .class_init = kvm_i8259_class_init, + .class_size = sizeof(KVMPICClass), +}; + +static void kvm_pic_register_types(void) +{ + type_register_static(&kvm_i8259_info); +} + +type_init(kvm_pic_register_types) diff --git a/src/hw/i386/kvm/ioapic.c b/src/hw/i386/kvm/ioapic.c new file mode 100644 index 0000000..b7390ca --- /dev/null +++ b/src/hw/i386/kvm/ioapic.c @@ -0,0 +1,178 @@ +/* + * KVM in-kernel IOPIC support + * + * Copyright (c) 2011 Siemens AG + * + * Authors: + * Jan Kiszka <jan.kiszka@siemens.com> + * + * This work is licensed under the terms of the GNU GPL version 2. + * See the COPYING file in the top-level directory. + */ + +#include "monitor/monitor.h" +#include "hw/i386/pc.h" +#include "hw/i386/ioapic_internal.h" +#include "hw/i386/apic_internal.h" +#include "sysemu/kvm.h" + +/* PC Utility function */ +void kvm_pc_setup_irq_routing(bool pci_enabled) +{ + KVMState *s = kvm_state; + int i; + + if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) { + for (i = 0; i < 8; ++i) { + if (i == 2) { + continue; + } + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i); + } + for (i = 8; i < 16; ++i) { + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8); + } + if (pci_enabled) { + for (i = 0; i < 24; ++i) { + if (i == 0) { + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2); + } else if (i != 2) { + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i); + } + } + } + kvm_irqchip_commit_routes(s); + } +} + +void kvm_pc_gsi_handler(void *opaque, int n, int level) +{ + GSIState *s = opaque; + + if (n < ISA_NUM_IRQS) { + /* Kernel will forward to both PIC and IOAPIC */ + qemu_set_irq(s->i8259_irq[n], level); + } else { + qemu_set_irq(s->ioapic_irq[n], level); + } +} + +typedef struct KVMIOAPICState KVMIOAPICState; + +struct KVMIOAPICState { + IOAPICCommonState ioapic; + uint32_t kvm_gsi_base; +}; + +static void kvm_ioapic_get(IOAPICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_ioapic_state *kioapic; + int ret, i; + + chip.chip_id = KVM_IRQCHIP_IOAPIC; + ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); + if (ret < 0) { + fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); + abort(); + } + + kioapic = &chip.chip.ioapic; + + s->id = kioapic->id; + s->ioregsel = kioapic->ioregsel; + s->irr = kioapic->irr; + for (i = 0; i < IOAPIC_NUM_PINS; i++) { + s->ioredtbl[i] = kioapic->redirtbl[i].bits; + } +} + +static void kvm_ioapic_put(IOAPICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_ioapic_state *kioapic; + int ret, i; + + chip.chip_id = KVM_IRQCHIP_IOAPIC; + kioapic = &chip.chip.ioapic; + + kioapic->id = s->id; + kioapic->ioregsel = s->ioregsel; + kioapic->base_address = s->busdev.mmio[0].addr; + kioapic->irr = s->irr; + for (i = 0; i < IOAPIC_NUM_PINS; i++) { + kioapic->redirtbl[i].bits = s->ioredtbl[i]; + } + + ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); + if (ret < 0) { + fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); + abort(); + } +} + +void kvm_ioapic_dump_state(Monitor *mon, const QDict *qdict) +{ + IOAPICCommonState s; + + kvm_ioapic_get(&s); + + ioapic_print_redtbl(mon, &s); +} + +static void kvm_ioapic_reset(DeviceState *dev) +{ + IOAPICCommonState *s = IOAPIC_COMMON(dev); + + ioapic_reset_common(dev); + kvm_ioapic_put(s); +} + +static void kvm_ioapic_set_irq(void *opaque, int irq, int level) +{ + KVMIOAPICState *s = opaque; + int delivered; + + delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level); + apic_report_irq_delivered(delivered); +} + +static void kvm_ioapic_realize(DeviceState *dev, Error **errp) +{ + IOAPICCommonState *s = IOAPIC_COMMON(dev); + + memory_region_init_reservation(&s->io_memory, NULL, "kvm-ioapic", 0x1000); + + qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS); +} + +static Property kvm_ioapic_properties[] = { + DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0), + DEFINE_PROP_END_OF_LIST() +}; + +static void kvm_ioapic_class_init(ObjectClass *klass, void *data) +{ + IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + k->realize = kvm_ioapic_realize; + k->pre_save = kvm_ioapic_get; + k->post_load = kvm_ioapic_put; + dc->reset = kvm_ioapic_reset; + dc->props = kvm_ioapic_properties; +} + +static const TypeInfo kvm_ioapic_info = { + .name = "kvm-ioapic", + .parent = TYPE_IOAPIC_COMMON, + .instance_size = sizeof(KVMIOAPICState), + .class_init = kvm_ioapic_class_init, +}; + +static void kvm_ioapic_register_types(void) +{ + type_register_static(&kvm_ioapic_info); +} + +type_init(kvm_ioapic_register_types) diff --git a/src/hw/i386/kvm/pci-assign.c b/src/hw/i386/kvm/pci-assign.c new file mode 100644 index 0000000..0fd6923 --- /dev/null +++ b/src/hw/i386/kvm/pci-assign.c @@ -0,0 +1,1900 @@ +/* + * Copyright (c) 2007, Neocleus Corporation. + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + * + * Assign a PCI device from the host to a guest VM. + * + * This implementation uses the classic device assignment interface of KVM + * and is only available on x86 hosts. It is expected to be obsoleted by VFIO + * based device assignment. + * + * Adapted for KVM (qemu-kvm) by Qumranet. QEMU version was based on qemu-kvm + * revision 4144fe9d48. See its repository for the history. + * + * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com) + * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com) + * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com) + * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com) + * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com) + */ +#include <stdio.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/types.h> +#include <sys/stat.h> +#include "hw/hw.h" +#include "hw/i386/pc.h" +#include "qemu/error-report.h" +#include "ui/console.h" +#include "hw/loader.h" +#include "monitor/monitor.h" +#include "qemu/range.h" +#include "sysemu/sysemu.h" +#include "hw/pci/pci.h" +#include "hw/pci/msi.h" +#include "kvm_i386.h" +#include "hw/pci/pci-assign.h" + +#define MSIX_PAGE_SIZE 0x1000 + +/* From linux/ioport.h */ +#define IORESOURCE_IO 0x00000100 /* Resource type */ +#define IORESOURCE_MEM 0x00000200 +#define IORESOURCE_IRQ 0x00000400 +#define IORESOURCE_DMA 0x00000800 +#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ +#define IORESOURCE_MEM_64 0x00100000 + +typedef struct PCIRegion { + int type; /* Memory or port I/O */ + int valid; + uint64_t base_addr; + uint64_t size; /* size of the region */ + int resource_fd; +} PCIRegion; + +typedef struct PCIDevRegions { + uint8_t bus, dev, func; /* Bus inside domain, device and function */ + int irq; /* IRQ number */ + uint16_t region_number; /* number of active regions */ + + /* Port I/O or MMIO Regions */ + PCIRegion regions[PCI_NUM_REGIONS - 1]; + int config_fd; +} PCIDevRegions; + +typedef struct AssignedDevRegion { + MemoryRegion container; + MemoryRegion real_iomem; + union { + uint8_t *r_virtbase; /* mmapped access address for memory regions */ + uint32_t r_baseport; /* the base guest port for I/O regions */ + } u; + pcibus_t e_size; /* emulated size of region in bytes */ + pcibus_t r_size; /* real size of region in bytes */ + PCIRegion *region; +} AssignedDevRegion; + +#define ASSIGNED_DEVICE_PREFER_MSI_BIT 0 +#define ASSIGNED_DEVICE_SHARE_INTX_BIT 1 + +#define ASSIGNED_DEVICE_PREFER_MSI_MASK (1 << ASSIGNED_DEVICE_PREFER_MSI_BIT) +#define ASSIGNED_DEVICE_SHARE_INTX_MASK (1 << ASSIGNED_DEVICE_SHARE_INTX_BIT) + +typedef struct MSIXTableEntry { + uint32_t addr_lo; + uint32_t addr_hi; + uint32_t data; + uint32_t ctrl; +} MSIXTableEntry; + +typedef enum AssignedIRQType { + ASSIGNED_IRQ_NONE = 0, + ASSIGNED_IRQ_INTX_HOST_INTX, + ASSIGNED_IRQ_INTX_HOST_MSI, + ASSIGNED_IRQ_MSI, + ASSIGNED_IRQ_MSIX +} AssignedIRQType; + +typedef struct AssignedDevice { + PCIDevice dev; + PCIHostDeviceAddress host; + uint32_t dev_id; + uint32_t features; + int intpin; + AssignedDevRegion v_addrs[PCI_NUM_REGIONS - 1]; + PCIDevRegions real_device; + PCIINTxRoute intx_route; + AssignedIRQType assigned_irq_type; + struct { +#define ASSIGNED_DEVICE_CAP_MSI (1 << 0) +#define ASSIGNED_DEVICE_CAP_MSIX (1 << 1) + uint32_t available; +#define ASSIGNED_DEVICE_MSI_ENABLED (1 << 0) +#define ASSIGNED_DEVICE_MSIX_ENABLED (1 << 1) +#define ASSIGNED_DEVICE_MSIX_MASKED (1 << 2) + uint32_t state; + } cap; + uint8_t emulate_config_read[PCI_CONFIG_SPACE_SIZE]; + uint8_t emulate_config_write[PCI_CONFIG_SPACE_SIZE]; + int msi_virq_nr; + int *msi_virq; + MSIXTableEntry *msix_table; + hwaddr msix_table_addr; + uint16_t msix_max; + MemoryRegion mmio; + char *configfd_name; + int32_t bootindex; +} AssignedDevice; + +#define TYPE_PCI_ASSIGN "kvm-pci-assign" +#define PCI_ASSIGN(obj) OBJECT_CHECK(AssignedDevice, (obj), TYPE_PCI_ASSIGN) + +static void assigned_dev_update_irq_routing(PCIDevice *dev); + +static void assigned_dev_load_option_rom(AssignedDevice *dev); + +static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev); + +static uint64_t assigned_dev_ioport_rw(AssignedDevRegion *dev_region, + hwaddr addr, int size, + uint64_t *data) +{ + uint64_t val = 0; + int fd = dev_region->region->resource_fd; + + if (data) { + DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx + ", addr="TARGET_FMT_plx"\n", *data, size, addr, addr); + if (pwrite(fd, data, size, addr) != size) { + error_report("%s - pwrite failed %s", __func__, strerror(errno)); + } + } else { + if (pread(fd, &val, size, addr) != size) { + error_report("%s - pread failed %s", __func__, strerror(errno)); + val = (1UL << (size * 8)) - 1; + } + DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx + ", addr=" TARGET_FMT_plx "\n", val, size, addr, addr); + } + return val; +} + +static void assigned_dev_ioport_write(void *opaque, hwaddr addr, + uint64_t data, unsigned size) +{ + assigned_dev_ioport_rw(opaque, addr, size, &data); +} + +static uint64_t assigned_dev_ioport_read(void *opaque, + hwaddr addr, unsigned size) +{ + return assigned_dev_ioport_rw(opaque, addr, size, NULL); +} + +static uint32_t slow_bar_readb(void *opaque, hwaddr addr) +{ + AssignedDevRegion *d = opaque; + uint8_t *in = d->u.r_virtbase + addr; + uint32_t r; + + r = *in; + DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r); + + return r; +} + +static uint32_t slow_bar_readw(void *opaque, hwaddr addr) +{ + AssignedDevRegion *d = opaque; + uint16_t *in = (uint16_t *)(d->u.r_virtbase + addr); + uint32_t r; + + r = *in; + DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r); + + return r; +} + +static uint32_t slow_bar_readl(void *opaque, hwaddr addr) +{ + AssignedDevRegion *d = opaque; + uint32_t *in = (uint32_t *)(d->u.r_virtbase + addr); + uint32_t r; + + r = *in; + DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r); + + return r; +} + +static void slow_bar_writeb(void *opaque, hwaddr addr, uint32_t val) +{ + AssignedDevRegion *d = opaque; + uint8_t *out = d->u.r_virtbase + addr; + + DEBUG("addr=0x" TARGET_FMT_plx " val=0x%02x\n", addr, val); + *out = val; +} + +static void slow_bar_writew(void *opaque, hwaddr addr, uint32_t val) +{ + AssignedDevRegion *d = opaque; + uint16_t *out = (uint16_t *)(d->u.r_virtbase + addr); + + DEBUG("addr=0x" TARGET_FMT_plx " val=0x%04x\n", addr, val); + *out = val; +} + +static void slow_bar_writel(void *opaque, hwaddr addr, uint32_t val) +{ + AssignedDevRegion *d = opaque; + uint32_t *out = (uint32_t *)(d->u.r_virtbase + addr); + + DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, val); + *out = val; +} + +static const MemoryRegionOps slow_bar_ops = { + .old_mmio = { + .read = { slow_bar_readb, slow_bar_readw, slow_bar_readl, }, + .write = { slow_bar_writeb, slow_bar_writew, slow_bar_writel, }, + }, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static void assigned_dev_iomem_setup(PCIDevice *pci_dev, int region_num, + pcibus_t e_size) +{ + AssignedDevice *r_dev = PCI_ASSIGN(pci_dev); + AssignedDevRegion *region = &r_dev->v_addrs[region_num]; + PCIRegion *real_region = &r_dev->real_device.regions[region_num]; + + if (e_size > 0) { + memory_region_init(®ion->container, OBJECT(pci_dev), + "assigned-dev-container", e_size); + memory_region_add_subregion(®ion->container, 0, ®ion->real_iomem); + + /* deal with MSI-X MMIO page */ + if (real_region->base_addr <= r_dev->msix_table_addr && + real_region->base_addr + real_region->size > + r_dev->msix_table_addr) { + uint64_t offset = r_dev->msix_table_addr - real_region->base_addr; + + memory_region_add_subregion_overlap(®ion->container, + offset, + &r_dev->mmio, + 1); + } + } +} + +static const MemoryRegionOps assigned_dev_ioport_ops = { + .read = assigned_dev_ioport_read, + .write = assigned_dev_ioport_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static void assigned_dev_ioport_setup(PCIDevice *pci_dev, int region_num, + pcibus_t size) +{ + AssignedDevice *r_dev = PCI_ASSIGN(pci_dev); + AssignedDevRegion *region = &r_dev->v_addrs[region_num]; + + region->e_size = size; + memory_region_init(®ion->container, OBJECT(pci_dev), + "assigned-dev-container", size); + memory_region_init_io(®ion->real_iomem, OBJECT(pci_dev), + &assigned_dev_ioport_ops, r_dev->v_addrs + region_num, + "assigned-dev-iomem", size); + memory_region_add_subregion(®ion->container, 0, ®ion->real_iomem); +} + +static uint32_t assigned_dev_pci_read(PCIDevice *d, int pos, int len) +{ + AssignedDevice *pci_dev = PCI_ASSIGN(d); + uint32_t val; + ssize_t ret; + int fd = pci_dev->real_device.config_fd; + +again: + ret = pread(fd, &val, len, pos); + if (ret != len) { + if ((ret < 0) && (errno == EINTR || errno == EAGAIN)) { + goto again; + } + + hw_error("pci read failed, ret = %zd errno = %d\n", ret, errno); + } + + return val; +} + +static uint8_t assigned_dev_pci_read_byte(PCIDevice *d, int pos) +{ + return (uint8_t)assigned_dev_pci_read(d, pos, 1); +} + +static void assigned_dev_pci_write(PCIDevice *d, int pos, uint32_t val, int len) +{ + AssignedDevice *pci_dev = PCI_ASSIGN(d); + ssize_t ret; + int fd = pci_dev->real_device.config_fd; + +again: + ret = pwrite(fd, &val, len, pos); + if (ret != len) { + if ((ret < 0) && (errno == EINTR || errno == EAGAIN)) { + goto again; + } + + hw_error("pci write failed, ret = %zd errno = %d\n", ret, errno); + } +} + +static void assigned_dev_emulate_config_read(AssignedDevice *dev, + uint32_t offset, uint32_t len) +{ + memset(dev->emulate_config_read + offset, 0xff, len); +} + +static void assigned_dev_direct_config_read(AssignedDevice *dev, + uint32_t offset, uint32_t len) +{ + memset(dev->emulate_config_read + offset, 0, len); +} + +static void assigned_dev_direct_config_write(AssignedDevice *dev, + uint32_t offset, uint32_t len) +{ + memset(dev->emulate_config_write + offset, 0, len); +} + +static uint8_t pci_find_cap_offset(PCIDevice *d, uint8_t cap, uint8_t start) +{ + int id; + int max_cap = 48; + int pos = start ? start : PCI_CAPABILITY_LIST; + int status; + + status = assigned_dev_pci_read_byte(d, PCI_STATUS); + if ((status & PCI_STATUS_CAP_LIST) == 0) { + return 0; + } + + while (max_cap--) { + pos = assigned_dev_pci_read_byte(d, pos); + if (pos < 0x40) { + break; + } + + pos &= ~3; + id = assigned_dev_pci_read_byte(d, pos + PCI_CAP_LIST_ID); + + if (id == 0xff) { + break; + } + if (id == cap) { + return pos; + } + + pos += PCI_CAP_LIST_NEXT; + } + return 0; +} + +static void assigned_dev_register_regions(PCIRegion *io_regions, + unsigned long regions_num, + AssignedDevice *pci_dev, + Error **errp) +{ + uint32_t i; + PCIRegion *cur_region = io_regions; + + for (i = 0; i < regions_num; i++, cur_region++) { + if (!cur_region->valid) { + continue; + } + + /* handle memory io regions */ + if (cur_region->type & IORESOURCE_MEM) { + int t = PCI_BASE_ADDRESS_SPACE_MEMORY; + if (cur_region->type & IORESOURCE_PREFETCH) { + t |= PCI_BASE_ADDRESS_MEM_PREFETCH; + } + if (cur_region->type & IORESOURCE_MEM_64) { + t |= PCI_BASE_ADDRESS_MEM_TYPE_64; + } + + /* map physical memory */ + pci_dev->v_addrs[i].u.r_virtbase = mmap(NULL, cur_region->size, + PROT_WRITE | PROT_READ, + MAP_SHARED, + cur_region->resource_fd, + (off_t)0); + + if (pci_dev->v_addrs[i].u.r_virtbase == MAP_FAILED) { + pci_dev->v_addrs[i].u.r_virtbase = NULL; + error_setg_errno(errp, errno, "Couldn't mmap 0x%" PRIx64 "!", + cur_region->base_addr); + return; + } + + pci_dev->v_addrs[i].r_size = cur_region->size; + pci_dev->v_addrs[i].e_size = 0; + + /* add offset */ + pci_dev->v_addrs[i].u.r_virtbase += + (cur_region->base_addr & 0xFFF); + + if (cur_region->size & 0xFFF) { + error_report("PCI region %d at address 0x%" PRIx64 " has " + "size 0x%" PRIx64 ", which is not a multiple of " + "4K. You might experience some performance hit " + "due to that.", + i, cur_region->base_addr, cur_region->size); + memory_region_init_io(&pci_dev->v_addrs[i].real_iomem, + OBJECT(pci_dev), &slow_bar_ops, + &pci_dev->v_addrs[i], + "assigned-dev-slow-bar", + cur_region->size); + } else { + void *virtbase = pci_dev->v_addrs[i].u.r_virtbase; + char name[32]; + snprintf(name, sizeof(name), "%s.bar%d", + object_get_typename(OBJECT(pci_dev)), i); + memory_region_init_ram_ptr(&pci_dev->v_addrs[i].real_iomem, + OBJECT(pci_dev), name, + cur_region->size, virtbase); + vmstate_register_ram(&pci_dev->v_addrs[i].real_iomem, + &pci_dev->dev.qdev); + } + + assigned_dev_iomem_setup(&pci_dev->dev, i, cur_region->size); + pci_register_bar((PCIDevice *) pci_dev, i, t, + &pci_dev->v_addrs[i].container); + continue; + } else { + /* handle port io regions */ + uint32_t val; + int ret; + + /* Test kernel support for ioport resource read/write. Old + * kernels return EIO. New kernels only allow 1/2/4 byte reads + * so should return EINVAL for a 3 byte read */ + ret = pread(pci_dev->v_addrs[i].region->resource_fd, &val, 3, 0); + if (ret >= 0) { + error_report("Unexpected return from I/O port read: %d", ret); + abort(); + } else if (errno != EINVAL) { + error_report("Kernel doesn't support ioport resource " + "access, hiding this region."); + close(pci_dev->v_addrs[i].region->resource_fd); + cur_region->valid = 0; + continue; + } + + pci_dev->v_addrs[i].u.r_baseport = cur_region->base_addr; + pci_dev->v_addrs[i].r_size = cur_region->size; + pci_dev->v_addrs[i].e_size = 0; + + assigned_dev_ioport_setup(&pci_dev->dev, i, cur_region->size); + pci_register_bar((PCIDevice *) pci_dev, i, + PCI_BASE_ADDRESS_SPACE_IO, + &pci_dev->v_addrs[i].container); + } + } + + /* success */ +} + +static void get_real_id(const char *devpath, const char *idname, uint16_t *val, + Error **errp) +{ + FILE *f; + char name[128]; + long id; + + snprintf(name, sizeof(name), "%s%s", devpath, idname); + f = fopen(name, "r"); + if (f == NULL) { + error_setg_file_open(errp, errno, name); + return; + } + if (fscanf(f, "%li\n", &id) == 1) { + *val = id; + } else { + error_setg(errp, "Failed to parse contents of '%s'", name); + } + fclose(f); +} + +static void get_real_vendor_id(const char *devpath, uint16_t *val, + Error **errp) +{ + get_real_id(devpath, "vendor", val, errp); +} + +static void get_real_device_id(const char *devpath, uint16_t *val, + Error **errp) +{ + get_real_id(devpath, "device", val, errp); +} + +static void get_real_device(AssignedDevice *pci_dev, Error **errp) +{ + char dir[128], name[128]; + int fd, r = 0; + FILE *f; + uint64_t start, end, size, flags; + uint16_t id; + PCIRegion *rp; + PCIDevRegions *dev = &pci_dev->real_device; + Error *local_err = NULL; + + dev->region_number = 0; + + snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/%04x:%02x:%02x.%x/", + pci_dev->host.domain, pci_dev->host.bus, + pci_dev->host.slot, pci_dev->host.function); + + snprintf(name, sizeof(name), "%sconfig", dir); + + if (pci_dev->configfd_name && *pci_dev->configfd_name) { + dev->config_fd = monitor_fd_param(cur_mon, pci_dev->configfd_name, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + } else { + dev->config_fd = open(name, O_RDWR); + + if (dev->config_fd == -1) { + error_setg_file_open(errp, errno, name); + return; + } + } +again: + r = read(dev->config_fd, pci_dev->dev.config, + pci_config_size(&pci_dev->dev)); + if (r < 0) { + if (errno == EINTR || errno == EAGAIN) { + goto again; + } + error_setg_errno(errp, errno, "read(\"%s\")", + (pci_dev->configfd_name && *pci_dev->configfd_name) ? + pci_dev->configfd_name : name); + return; + } + + /* Restore or clear multifunction, this is always controlled by qemu */ + if (pci_dev->dev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { + pci_dev->dev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; + } else { + pci_dev->dev.config[PCI_HEADER_TYPE] &= ~PCI_HEADER_TYPE_MULTI_FUNCTION; + } + + /* Clear host resource mapping info. If we choose not to register a + * BAR, such as might be the case with the option ROM, we can get + * confusing, unwritable, residual addresses from the host here. */ + memset(&pci_dev->dev.config[PCI_BASE_ADDRESS_0], 0, 24); + memset(&pci_dev->dev.config[PCI_ROM_ADDRESS], 0, 4); + + snprintf(name, sizeof(name), "%sresource", dir); + + f = fopen(name, "r"); + if (f == NULL) { + error_setg_file_open(errp, errno, name); + return; + } + + for (r = 0; r < PCI_ROM_SLOT; r++) { + if (fscanf(f, "%" SCNi64 " %" SCNi64 " %" SCNi64 "\n", + &start, &end, &flags) != 3) { + break; + } + + rp = dev->regions + r; + rp->valid = 0; + rp->resource_fd = -1; + size = end - start + 1; + flags &= IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH + | IORESOURCE_MEM_64; + if (size == 0 || (flags & ~IORESOURCE_PREFETCH) == 0) { + continue; + } + if (flags & IORESOURCE_MEM) { + flags &= ~IORESOURCE_IO; + } else { + flags &= ~IORESOURCE_PREFETCH; + } + snprintf(name, sizeof(name), "%sresource%d", dir, r); + fd = open(name, O_RDWR); + if (fd == -1) { + continue; + } + rp->resource_fd = fd; + + rp->type = flags; + rp->valid = 1; + rp->base_addr = start; + rp->size = size; + pci_dev->v_addrs[r].region = rp; + DEBUG("region %d size %" PRIu64 " start 0x%" PRIx64 + " type %d resource_fd %d\n", + r, rp->size, start, rp->type, rp->resource_fd); + } + + fclose(f); + + /* read and fill vendor ID */ + get_real_vendor_id(dir, &id, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + pci_dev->dev.config[0] = id & 0xff; + pci_dev->dev.config[1] = (id & 0xff00) >> 8; + + /* read and fill device ID */ + get_real_device_id(dir, &id, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + pci_dev->dev.config[2] = id & 0xff; + pci_dev->dev.config[3] = (id & 0xff00) >> 8; + + pci_word_test_and_clear_mask(pci_dev->emulate_config_write + PCI_COMMAND, + PCI_COMMAND_MASTER | PCI_COMMAND_INTX_DISABLE); + + dev->region_number = r; +} + +static void free_msi_virqs(AssignedDevice *dev) +{ + int i; + + for (i = 0; i < dev->msi_virq_nr; i++) { + if (dev->msi_virq[i] >= 0) { + kvm_irqchip_release_virq(kvm_state, dev->msi_virq[i]); + dev->msi_virq[i] = -1; + } + } + g_free(dev->msi_virq); + dev->msi_virq = NULL; + dev->msi_virq_nr = 0; +} + +static void free_assigned_device(AssignedDevice *dev) +{ + int i; + + if (dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) { + assigned_dev_unregister_msix_mmio(dev); + } + for (i = 0; i < dev->real_device.region_number; i++) { + PCIRegion *pci_region = &dev->real_device.regions[i]; + AssignedDevRegion *region = &dev->v_addrs[i]; + + if (!pci_region->valid) { + continue; + } + if (pci_region->type & IORESOURCE_IO) { + if (region->u.r_baseport) { + memory_region_del_subregion(®ion->container, + ®ion->real_iomem); + } + } else if (pci_region->type & IORESOURCE_MEM) { + if (region->u.r_virtbase) { + memory_region_del_subregion(®ion->container, + ®ion->real_iomem); + + /* Remove MSI-X table subregion */ + if (pci_region->base_addr <= dev->msix_table_addr && + pci_region->base_addr + pci_region->size > + dev->msix_table_addr) { + memory_region_del_subregion(®ion->container, + &dev->mmio); + } + if (munmap(region->u.r_virtbase, + (pci_region->size + 0xFFF) & 0xFFFFF000)) { + error_report("Failed to unmap assigned device region: %s", + strerror(errno)); + } + } + } + if (pci_region->resource_fd >= 0) { + close(pci_region->resource_fd); + } + } + + if (dev->real_device.config_fd >= 0) { + close(dev->real_device.config_fd); + } + + free_msi_virqs(dev); +} + +/* This function tries to determine the cause of the PCI assignment failure. It + * always returns the cause as a dynamically allocated, human readable string. + * If the function fails to determine the cause for any internal reason, then + * the returned string will state that fact. + */ +static char *assign_failed_examine(const AssignedDevice *dev) +{ + char name[PATH_MAX], dir[PATH_MAX], driver[PATH_MAX] = {}, *ns; + uint16_t vendor_id, device_id; + int r; + Error *local_err = NULL; + + snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/", + dev->host.domain, dev->host.bus, dev->host.slot, + dev->host.function); + + snprintf(name, sizeof(name), "%sdriver", dir); + + r = readlink(name, driver, sizeof(driver)); + if ((r <= 0) || r >= sizeof(driver)) { + goto fail; + } + + driver[r] = 0; + ns = strrchr(driver, '/'); + if (!ns) { + goto fail; + } + + ns++; + + if ((get_real_vendor_id(dir, &vendor_id, &local_err), local_err) || + (get_real_device_id(dir, &device_id, &local_err), local_err)) { + /* We're already analyzing an assignment error, so we suppress this + * one just like the others above. + */ + error_free(local_err); + goto fail; + } + + return g_strdup_printf( + "*** The driver '%s' is occupying your device %04x:%02x:%02x.%x.\n" + "***\n" + "*** You can try the following commands to free it:\n" + "***\n" + "*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub/new_id\n" + "*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/%s/unbind\n" + "*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/" + "pci-stub/bind\n" + "*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub/remove_id\n" + "***", + ns, dev->host.domain, dev->host.bus, dev->host.slot, + dev->host.function, vendor_id, device_id, + dev->host.domain, dev->host.bus, dev->host.slot, dev->host.function, + ns, dev->host.domain, dev->host.bus, dev->host.slot, + dev->host.function, vendor_id, device_id); + +fail: + return g_strdup("Couldn't find out why."); +} + +static void assign_device(AssignedDevice *dev, Error **errp) +{ + uint32_t flags = KVM_DEV_ASSIGN_ENABLE_IOMMU; + int r; + + /* Only pass non-zero PCI segment to capable module */ + if (!kvm_check_extension(kvm_state, KVM_CAP_PCI_SEGMENT) && + dev->host.domain) { + error_setg(errp, "Can't assign device inside non-zero PCI segment " + "as this KVM module doesn't support it."); + return; + } + + if (!kvm_check_extension(kvm_state, KVM_CAP_IOMMU)) { + error_setg(errp, "No IOMMU found. Unable to assign device \"%s\"", + dev->dev.qdev.id); + return; + } + + if (dev->features & ASSIGNED_DEVICE_SHARE_INTX_MASK && + kvm_has_intx_set_mask()) { + flags |= KVM_DEV_ASSIGN_PCI_2_3; + } + + r = kvm_device_pci_assign(kvm_state, &dev->host, flags, &dev->dev_id); + if (r < 0) { + switch (r) { + case -EBUSY: { + char *cause; + + cause = assign_failed_examine(dev); + error_setg_errno(errp, -r, "Failed to assign device \"%s\"\n%s", + dev->dev.qdev.id, cause); + g_free(cause); + break; + } + default: + error_setg_errno(errp, -r, "Failed to assign device \"%s\"", + dev->dev.qdev.id); + break; + } + } +} + +static void verify_irqchip_in_kernel(Error **errp) +{ + if (kvm_irqchip_in_kernel()) { + return; + } + error_setg(errp, "pci-assign requires KVM with in-kernel irqchip enabled"); +} + +static int assign_intx(AssignedDevice *dev, Error **errp) +{ + AssignedIRQType new_type; + PCIINTxRoute intx_route; + bool intx_host_msi; + int r; + Error *local_err = NULL; + + /* Interrupt PIN 0 means don't use INTx */ + if (assigned_dev_pci_read_byte(&dev->dev, PCI_INTERRUPT_PIN) == 0) { + pci_device_set_intx_routing_notifier(&dev->dev, NULL); + return 0; + } + + verify_irqchip_in_kernel(&local_err); + if (local_err) { + error_propagate(errp, local_err); + return -ENOTSUP; + } + + pci_device_set_intx_routing_notifier(&dev->dev, + assigned_dev_update_irq_routing); + + intx_route = pci_device_route_intx_to_irq(&dev->dev, dev->intpin); + assert(intx_route.mode != PCI_INTX_INVERTED); + + if (!pci_intx_route_changed(&dev->intx_route, &intx_route)) { + return 0; + } + + switch (dev->assigned_irq_type) { + case ASSIGNED_IRQ_INTX_HOST_INTX: + case ASSIGNED_IRQ_INTX_HOST_MSI: + intx_host_msi = dev->assigned_irq_type == ASSIGNED_IRQ_INTX_HOST_MSI; + r = kvm_device_intx_deassign(kvm_state, dev->dev_id, intx_host_msi); + break; + case ASSIGNED_IRQ_MSI: + r = kvm_device_msi_deassign(kvm_state, dev->dev_id); + break; + case ASSIGNED_IRQ_MSIX: + r = kvm_device_msix_deassign(kvm_state, dev->dev_id); + break; + default: + r = 0; + break; + } + if (r) { + perror("assign_intx: deassignment of previous interrupt failed"); + } + dev->assigned_irq_type = ASSIGNED_IRQ_NONE; + + if (intx_route.mode == PCI_INTX_DISABLED) { + dev->intx_route = intx_route; + return 0; + } + +retry: + if (dev->features & ASSIGNED_DEVICE_PREFER_MSI_MASK && + dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) { + intx_host_msi = true; + new_type = ASSIGNED_IRQ_INTX_HOST_MSI; + } else { + intx_host_msi = false; + new_type = ASSIGNED_IRQ_INTX_HOST_INTX; + } + + r = kvm_device_intx_assign(kvm_state, dev->dev_id, intx_host_msi, + intx_route.irq); + if (r < 0) { + if (r == -EIO && !(dev->features & ASSIGNED_DEVICE_PREFER_MSI_MASK) && + dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) { + /* Retry with host-side MSI. There might be an IRQ conflict and + * either the kernel or the device doesn't support sharing. */ + error_report("Host-side INTx sharing not supported, " + "using MSI instead"); + error_printf("Some devices do not work properly in this mode.\n"); + dev->features |= ASSIGNED_DEVICE_PREFER_MSI_MASK; + goto retry; + } + error_setg_errno(errp, -r, + "Failed to assign irq for \"%s\"\n" + "Perhaps you are assigning a device " + "that shares an IRQ with another device?", + dev->dev.qdev.id); + return r; + } + + dev->intx_route = intx_route; + dev->assigned_irq_type = new_type; + return r; +} + +static void deassign_device(AssignedDevice *dev) +{ + int r; + + r = kvm_device_pci_deassign(kvm_state, dev->dev_id); + assert(r == 0); +} + +/* The pci config space got updated. Check if irq numbers have changed + * for our devices + */ +static void assigned_dev_update_irq_routing(PCIDevice *dev) +{ + AssignedDevice *assigned_dev = PCI_ASSIGN(dev); + Error *err = NULL; + int r; + + r = assign_intx(assigned_dev, &err); + if (r < 0) { + error_report_err(err); + err = NULL; + qdev_unplug(&dev->qdev, &err); + assert(!err); + } +} + +static void assigned_dev_update_msi(PCIDevice *pci_dev) +{ + AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev); + uint8_t ctrl_byte = pci_get_byte(pci_dev->config + pci_dev->msi_cap + + PCI_MSI_FLAGS); + int r; + + /* Some guests gratuitously disable MSI even if they're not using it, + * try to catch this by only deassigning irqs if the guest is using + * MSI or intends to start. */ + if (assigned_dev->assigned_irq_type == ASSIGNED_IRQ_MSI || + (ctrl_byte & PCI_MSI_FLAGS_ENABLE)) { + r = kvm_device_msi_deassign(kvm_state, assigned_dev->dev_id); + /* -ENXIO means no assigned irq */ + if (r && r != -ENXIO) { + perror("assigned_dev_update_msi: deassign irq"); + } + + free_msi_virqs(assigned_dev); + + assigned_dev->assigned_irq_type = ASSIGNED_IRQ_NONE; + pci_device_set_intx_routing_notifier(pci_dev, NULL); + } + + if (ctrl_byte & PCI_MSI_FLAGS_ENABLE) { + MSIMessage msg = msi_get_message(pci_dev, 0); + int virq; + + virq = kvm_irqchip_add_msi_route(kvm_state, msg, pci_dev); + if (virq < 0) { + perror("assigned_dev_update_msi: kvm_irqchip_add_msi_route"); + return; + } + + assigned_dev->msi_virq = g_malloc(sizeof(*assigned_dev->msi_virq)); + assigned_dev->msi_virq_nr = 1; + assigned_dev->msi_virq[0] = virq; + if (kvm_device_msi_assign(kvm_state, assigned_dev->dev_id, virq) < 0) { + perror("assigned_dev_update_msi: kvm_device_msi_assign"); + } + + assigned_dev->intx_route.mode = PCI_INTX_DISABLED; + assigned_dev->intx_route.irq = -1; + assigned_dev->assigned_irq_type = ASSIGNED_IRQ_MSI; + } else { + Error *local_err = NULL; + + assign_intx(assigned_dev, &local_err); + if (local_err) { + error_report_err(local_err); + } + } +} + +static void assigned_dev_update_msi_msg(PCIDevice *pci_dev) +{ + AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev); + uint8_t ctrl_byte = pci_get_byte(pci_dev->config + pci_dev->msi_cap + + PCI_MSI_FLAGS); + + if (assigned_dev->assigned_irq_type != ASSIGNED_IRQ_MSI || + !(ctrl_byte & PCI_MSI_FLAGS_ENABLE)) { + return; + } + + kvm_irqchip_update_msi_route(kvm_state, assigned_dev->msi_virq[0], + msi_get_message(pci_dev, 0), pci_dev); +} + +static bool assigned_dev_msix_masked(MSIXTableEntry *entry) +{ + return (entry->ctrl & cpu_to_le32(0x1)) != 0; +} + +/* + * When MSI-X is first enabled the vector table typically has all the + * vectors masked, so we can't use that as the obvious test to figure out + * how many vectors to initially enable. Instead we look at the data field + * because this is what worked for pci-assign for a long time. This makes + * sure the physical MSI-X state tracks the guest's view, which is important + * for some VF/PF and PF/fw communication channels. + */ +static bool assigned_dev_msix_skipped(MSIXTableEntry *entry) +{ + return !entry->data; +} + +static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev) +{ + AssignedDevice *adev = PCI_ASSIGN(pci_dev); + uint16_t entries_nr = 0; + int i, r = 0; + MSIXTableEntry *entry = adev->msix_table; + MSIMessage msg; + + /* Get the usable entry number for allocating */ + for (i = 0; i < adev->msix_max; i++, entry++) { + if (assigned_dev_msix_skipped(entry)) { + continue; + } + entries_nr++; + } + + DEBUG("MSI-X entries: %d\n", entries_nr); + + /* It's valid to enable MSI-X with all entries masked */ + if (!entries_nr) { + return 0; + } + + r = kvm_device_msix_init_vectors(kvm_state, adev->dev_id, entries_nr); + if (r != 0) { + error_report("fail to set MSI-X entry number for MSIX! %s", + strerror(-r)); + return r; + } + + free_msi_virqs(adev); + + adev->msi_virq_nr = adev->msix_max; + adev->msi_virq = g_malloc(adev->msix_max * sizeof(*adev->msi_virq)); + + entry = adev->msix_table; + for (i = 0; i < adev->msix_max; i++, entry++) { + adev->msi_virq[i] = -1; + + if (assigned_dev_msix_skipped(entry)) { + continue; + } + + msg.address = entry->addr_lo | ((uint64_t)entry->addr_hi << 32); + msg.data = entry->data; + r = kvm_irqchip_add_msi_route(kvm_state, msg, pci_dev); + if (r < 0) { + return r; + } + adev->msi_virq[i] = r; + + DEBUG("MSI-X vector %d, gsi %d, addr %08x_%08x, data %08x\n", i, + r, entry->addr_hi, entry->addr_lo, entry->data); + + r = kvm_device_msix_set_vector(kvm_state, adev->dev_id, i, + adev->msi_virq[i]); + if (r) { + error_report("fail to set MSI-X entry! %s", strerror(-r)); + break; + } + } + + return r; +} + +static void assigned_dev_update_msix(PCIDevice *pci_dev) +{ + AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev); + uint16_t ctrl_word = pci_get_word(pci_dev->config + pci_dev->msix_cap + + PCI_MSIX_FLAGS); + int r; + + /* Some guests gratuitously disable MSIX even if they're not using it, + * try to catch this by only deassigning irqs if the guest is using + * MSIX or intends to start. */ + if ((assigned_dev->assigned_irq_type == ASSIGNED_IRQ_MSIX) || + (ctrl_word & PCI_MSIX_FLAGS_ENABLE)) { + r = kvm_device_msix_deassign(kvm_state, assigned_dev->dev_id); + /* -ENXIO means no assigned irq */ + if (r && r != -ENXIO) { + perror("assigned_dev_update_msix: deassign irq"); + } + + free_msi_virqs(assigned_dev); + + assigned_dev->assigned_irq_type = ASSIGNED_IRQ_NONE; + pci_device_set_intx_routing_notifier(pci_dev, NULL); + } + + if (ctrl_word & PCI_MSIX_FLAGS_ENABLE) { + if (assigned_dev_update_msix_mmio(pci_dev) < 0) { + perror("assigned_dev_update_msix_mmio"); + return; + } + + if (assigned_dev->msi_virq_nr > 0) { + if (kvm_device_msix_assign(kvm_state, assigned_dev->dev_id) < 0) { + perror("assigned_dev_enable_msix: assign irq"); + return; + } + } + assigned_dev->intx_route.mode = PCI_INTX_DISABLED; + assigned_dev->intx_route.irq = -1; + assigned_dev->assigned_irq_type = ASSIGNED_IRQ_MSIX; + } else { + Error *local_err = NULL; + + assign_intx(assigned_dev, &local_err); + if (local_err) { + error_report_err(local_err); + } + } +} + +static uint32_t assigned_dev_pci_read_config(PCIDevice *pci_dev, + uint32_t address, int len) +{ + AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev); + uint32_t virt_val = pci_default_read_config(pci_dev, address, len); + uint32_t real_val, emulate_mask, full_emulation_mask; + + emulate_mask = 0; + memcpy(&emulate_mask, assigned_dev->emulate_config_read + address, len); + emulate_mask = le32_to_cpu(emulate_mask); + + full_emulation_mask = 0xffffffff >> (32 - len * 8); + + if (emulate_mask != full_emulation_mask) { + real_val = assigned_dev_pci_read(pci_dev, address, len); + return (virt_val & emulate_mask) | (real_val & ~emulate_mask); + } else { + return virt_val; + } +} + +static void assigned_dev_pci_write_config(PCIDevice *pci_dev, uint32_t address, + uint32_t val, int len) +{ + AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev); + uint16_t old_cmd = pci_get_word(pci_dev->config + PCI_COMMAND); + uint32_t emulate_mask, full_emulation_mask; + int ret; + + pci_default_write_config(pci_dev, address, val, len); + + if (kvm_has_intx_set_mask() && + range_covers_byte(address, len, PCI_COMMAND + 1)) { + bool intx_masked = (pci_get_word(pci_dev->config + PCI_COMMAND) & + PCI_COMMAND_INTX_DISABLE); + + if (intx_masked != !!(old_cmd & PCI_COMMAND_INTX_DISABLE)) { + ret = kvm_device_intx_set_mask(kvm_state, assigned_dev->dev_id, + intx_masked); + if (ret) { + perror("assigned_dev_pci_write_config: set intx mask"); + } + } + } + if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) { + if (range_covers_byte(address, len, + pci_dev->msi_cap + PCI_MSI_FLAGS)) { + assigned_dev_update_msi(pci_dev); + } else if (ranges_overlap(address, len, /* 32bit MSI only */ + pci_dev->msi_cap + PCI_MSI_ADDRESS_LO, 6)) { + assigned_dev_update_msi_msg(pci_dev); + } + } + if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) { + if (range_covers_byte(address, len, + pci_dev->msix_cap + PCI_MSIX_FLAGS + 1)) { + assigned_dev_update_msix(pci_dev); + } + } + + emulate_mask = 0; + memcpy(&emulate_mask, assigned_dev->emulate_config_write + address, len); + emulate_mask = le32_to_cpu(emulate_mask); + + full_emulation_mask = 0xffffffff >> (32 - len * 8); + + if (emulate_mask != full_emulation_mask) { + if (emulate_mask) { + val &= ~emulate_mask; + val |= assigned_dev_pci_read(pci_dev, address, len) & emulate_mask; + } + assigned_dev_pci_write(pci_dev, address, val, len); + } +} + +static void assigned_dev_setup_cap_read(AssignedDevice *dev, uint32_t offset, + uint32_t len) +{ + assigned_dev_direct_config_read(dev, offset, len); + assigned_dev_emulate_config_read(dev, offset + PCI_CAP_LIST_NEXT, 1); +} + +static int assigned_device_pci_cap_init(PCIDevice *pci_dev, Error **errp) +{ + AssignedDevice *dev = PCI_ASSIGN(pci_dev); + PCIRegion *pci_region = dev->real_device.regions; + int ret, pos; + Error *local_err = NULL; + + /* Clear initial capabilities pointer and status copied from hw */ + pci_set_byte(pci_dev->config + PCI_CAPABILITY_LIST, 0); + pci_set_word(pci_dev->config + PCI_STATUS, + pci_get_word(pci_dev->config + PCI_STATUS) & + ~PCI_STATUS_CAP_LIST); + + /* Expose MSI capability + * MSI capability is the 1st capability in capability config */ + pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_MSI, 0); + if (pos != 0 && kvm_check_extension(kvm_state, KVM_CAP_ASSIGN_DEV_IRQ)) { + verify_irqchip_in_kernel(&local_err); + if (local_err) { + error_propagate(errp, local_err); + return -ENOTSUP; + } + dev->cap.available |= ASSIGNED_DEVICE_CAP_MSI; + /* Only 32-bit/no-mask currently supported */ + ret = pci_add_capability2(pci_dev, PCI_CAP_ID_MSI, pos, 10, + &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + return ret; + } + pci_dev->msi_cap = pos; + + pci_set_word(pci_dev->config + pos + PCI_MSI_FLAGS, + pci_get_word(pci_dev->config + pos + PCI_MSI_FLAGS) & + PCI_MSI_FLAGS_QMASK); + pci_set_long(pci_dev->config + pos + PCI_MSI_ADDRESS_LO, 0); + pci_set_word(pci_dev->config + pos + PCI_MSI_DATA_32, 0); + + /* Set writable fields */ + pci_set_word(pci_dev->wmask + pos + PCI_MSI_FLAGS, + PCI_MSI_FLAGS_QSIZE | PCI_MSI_FLAGS_ENABLE); + pci_set_long(pci_dev->wmask + pos + PCI_MSI_ADDRESS_LO, 0xfffffffc); + pci_set_word(pci_dev->wmask + pos + PCI_MSI_DATA_32, 0xffff); + } + /* Expose MSI-X capability */ + pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_MSIX, 0); + if (pos != 0 && kvm_device_msix_supported(kvm_state)) { + int bar_nr; + uint32_t msix_table_entry; + uint16_t msix_max; + + verify_irqchip_in_kernel(&local_err); + if (local_err) { + error_propagate(errp, local_err); + return -ENOTSUP; + } + dev->cap.available |= ASSIGNED_DEVICE_CAP_MSIX; + ret = pci_add_capability2(pci_dev, PCI_CAP_ID_MSIX, pos, 12, + &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + return ret; + } + pci_dev->msix_cap = pos; + + msix_max = (pci_get_word(pci_dev->config + pos + PCI_MSIX_FLAGS) & + PCI_MSIX_FLAGS_QSIZE) + 1; + msix_max = MIN(msix_max, KVM_MAX_MSIX_PER_DEV); + pci_set_word(pci_dev->config + pos + PCI_MSIX_FLAGS, msix_max - 1); + + /* Only enable and function mask bits are writable */ + pci_set_word(pci_dev->wmask + pos + PCI_MSIX_FLAGS, + PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL); + + msix_table_entry = pci_get_long(pci_dev->config + pos + PCI_MSIX_TABLE); + bar_nr = msix_table_entry & PCI_MSIX_FLAGS_BIRMASK; + msix_table_entry &= ~PCI_MSIX_FLAGS_BIRMASK; + dev->msix_table_addr = pci_region[bar_nr].base_addr + msix_table_entry; + dev->msix_max = msix_max; + } + + /* Minimal PM support, nothing writable, device appears to NAK changes */ + pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_PM, 0); + if (pos) { + uint16_t pmc; + + ret = pci_add_capability2(pci_dev, PCI_CAP_ID_PM, pos, PCI_PM_SIZEOF, + &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + return ret; + } + + assigned_dev_setup_cap_read(dev, pos, PCI_PM_SIZEOF); + + pmc = pci_get_word(pci_dev->config + pos + PCI_CAP_FLAGS); + pmc &= (PCI_PM_CAP_VER_MASK | PCI_PM_CAP_DSI); + pci_set_word(pci_dev->config + pos + PCI_CAP_FLAGS, pmc); + + /* assign_device will bring the device up to D0, so we don't need + * to worry about doing that ourselves here. */ + pci_set_word(pci_dev->config + pos + PCI_PM_CTRL, + PCI_PM_CTRL_NO_SOFT_RESET); + + pci_set_byte(pci_dev->config + pos + PCI_PM_PPB_EXTENSIONS, 0); + pci_set_byte(pci_dev->config + pos + PCI_PM_DATA_REGISTER, 0); + } + + pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_EXP, 0); + if (pos) { + uint8_t version, size = 0; + uint16_t type, devctl, lnksta; + uint32_t devcap, lnkcap; + + version = pci_get_byte(pci_dev->config + pos + PCI_EXP_FLAGS); + version &= PCI_EXP_FLAGS_VERS; + if (version == 1) { + size = 0x14; + } else if (version == 2) { + /* + * Check for non-std size, accept reduced size to 0x34, + * which is what bcm5761 implemented, violating the + * PCIe v3.0 spec that regs should exist and be read as 0, + * not optionally provided and shorten the struct size. + */ + size = MIN(0x3c, PCI_CONFIG_SPACE_SIZE - pos); + if (size < 0x34) { + error_setg(errp, "Invalid size PCIe cap-id 0x%x", + PCI_CAP_ID_EXP); + return -EINVAL; + } else if (size != 0x3c) { + error_report("WARNING, %s: PCIe cap-id 0x%x has " + "non-standard size 0x%x; std size should be 0x3c", + __func__, PCI_CAP_ID_EXP, size); + } + } else if (version == 0) { + uint16_t vid, did; + vid = pci_get_word(pci_dev->config + PCI_VENDOR_ID); + did = pci_get_word(pci_dev->config + PCI_DEVICE_ID); + if (vid == PCI_VENDOR_ID_INTEL && did == 0x10ed) { + /* + * quirk for Intel 82599 VF with invalid PCIe capability + * version, should really be version 2 (same as PF) + */ + size = 0x3c; + } + } + + if (size == 0) { + error_setg(errp, "Unsupported PCI express capability version %d", + version); + return -EINVAL; + } + + ret = pci_add_capability2(pci_dev, PCI_CAP_ID_EXP, pos, size, + &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + return ret; + } + + assigned_dev_setup_cap_read(dev, pos, size); + + type = pci_get_word(pci_dev->config + pos + PCI_EXP_FLAGS); + type = (type & PCI_EXP_FLAGS_TYPE) >> 4; + if (type != PCI_EXP_TYPE_ENDPOINT && + type != PCI_EXP_TYPE_LEG_END && type != PCI_EXP_TYPE_RC_END) { + error_setg(errp, "Device assignment only supports endpoint " + "assignment, device type %d", type); + return -EINVAL; + } + + /* capabilities, pass existing read-only copy + * PCI_EXP_FLAGS_IRQ: updated by hardware, should be direct read */ + + /* device capabilities: hide FLR */ + devcap = pci_get_long(pci_dev->config + pos + PCI_EXP_DEVCAP); + devcap &= ~PCI_EXP_DEVCAP_FLR; + pci_set_long(pci_dev->config + pos + PCI_EXP_DEVCAP, devcap); + + /* device control: clear all error reporting enable bits, leaving + * only a few host values. Note, these are + * all writable, but not passed to hw. + */ + devctl = pci_get_word(pci_dev->config + pos + PCI_EXP_DEVCTL); + devctl = (devctl & (PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_PAYLOAD)) | + PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN; + pci_set_word(pci_dev->config + pos + PCI_EXP_DEVCTL, devctl); + devctl = PCI_EXP_DEVCTL_BCR_FLR | PCI_EXP_DEVCTL_AUX_PME; + pci_set_word(pci_dev->wmask + pos + PCI_EXP_DEVCTL, ~devctl); + + /* Clear device status */ + pci_set_word(pci_dev->config + pos + PCI_EXP_DEVSTA, 0); + + /* Link capabilities, expose links and latencues, clear reporting */ + lnkcap = pci_get_long(pci_dev->config + pos + PCI_EXP_LNKCAP); + lnkcap &= (PCI_EXP_LNKCAP_SLS | PCI_EXP_LNKCAP_MLW | + PCI_EXP_LNKCAP_ASPMS | PCI_EXP_LNKCAP_L0SEL | + PCI_EXP_LNKCAP_L1EL); + pci_set_long(pci_dev->config + pos + PCI_EXP_LNKCAP, lnkcap); + + /* Link control, pass existing read-only copy. Should be writable? */ + + /* Link status, only expose current speed and width */ + lnksta = pci_get_word(pci_dev->config + pos + PCI_EXP_LNKSTA); + lnksta &= (PCI_EXP_LNKSTA_CLS | PCI_EXP_LNKSTA_NLW); + pci_set_word(pci_dev->config + pos + PCI_EXP_LNKSTA, lnksta); + + if (version >= 2) { + /* Slot capabilities, control, status - not needed for endpoints */ + pci_set_long(pci_dev->config + pos + PCI_EXP_SLTCAP, 0); + pci_set_word(pci_dev->config + pos + PCI_EXP_SLTCTL, 0); + pci_set_word(pci_dev->config + pos + PCI_EXP_SLTSTA, 0); + + /* Root control, capabilities, status - not needed for endpoints */ + pci_set_word(pci_dev->config + pos + PCI_EXP_RTCTL, 0); + pci_set_word(pci_dev->config + pos + PCI_EXP_RTCAP, 0); + pci_set_long(pci_dev->config + pos + PCI_EXP_RTSTA, 0); + + /* Device capabilities/control 2, pass existing read-only copy */ + /* Link control 2, pass existing read-only copy */ + } + } + + pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_PCIX, 0); + if (pos) { + uint16_t cmd; + uint32_t status; + + /* Only expose the minimum, 8 byte capability */ + ret = pci_add_capability2(pci_dev, PCI_CAP_ID_PCIX, pos, 8, + &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + return ret; + } + + assigned_dev_setup_cap_read(dev, pos, 8); + + /* Command register, clear upper bits, including extended modes */ + cmd = pci_get_word(pci_dev->config + pos + PCI_X_CMD); + cmd &= (PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO | PCI_X_CMD_MAX_READ | + PCI_X_CMD_MAX_SPLIT); + pci_set_word(pci_dev->config + pos + PCI_X_CMD, cmd); + + /* Status register, update with emulated PCI bus location, clear + * error bits, leave the rest. */ + status = pci_get_long(pci_dev->config + pos + PCI_X_STATUS); + status &= ~(PCI_X_STATUS_BUS | PCI_X_STATUS_DEVFN); + status |= pci_requester_id(pci_dev); + status &= ~(PCI_X_STATUS_SPL_DISC | PCI_X_STATUS_UNX_SPL | + PCI_X_STATUS_SPL_ERR); + pci_set_long(pci_dev->config + pos + PCI_X_STATUS, status); + } + + pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VPD, 0); + if (pos) { + /* Direct R/W passthrough */ + ret = pci_add_capability2(pci_dev, PCI_CAP_ID_VPD, pos, 8, + &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + return ret; + } + + assigned_dev_setup_cap_read(dev, pos, 8); + + /* direct write for cap content */ + assigned_dev_direct_config_write(dev, pos + 2, 6); + } + + /* Devices can have multiple vendor capabilities, get them all */ + for (pos = 0; (pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VNDR, pos)); + pos += PCI_CAP_LIST_NEXT) { + uint8_t len = pci_get_byte(pci_dev->config + pos + PCI_CAP_FLAGS); + /* Direct R/W passthrough */ + ret = pci_add_capability2(pci_dev, PCI_CAP_ID_VNDR, pos, len, + &local_err); + if (ret < 0) { + error_propagate(errp, local_err); + return ret; + } + + assigned_dev_setup_cap_read(dev, pos, len); + + /* direct write for cap content */ + assigned_dev_direct_config_write(dev, pos + 2, len - 2); + } + + /* If real and virtual capability list status bits differ, virtualize the + * access. */ + if ((pci_get_word(pci_dev->config + PCI_STATUS) & PCI_STATUS_CAP_LIST) != + (assigned_dev_pci_read_byte(pci_dev, PCI_STATUS) & + PCI_STATUS_CAP_LIST)) { + dev->emulate_config_read[PCI_STATUS] |= PCI_STATUS_CAP_LIST; + } + + return 0; +} + +static uint64_t +assigned_dev_msix_mmio_read(void *opaque, hwaddr addr, + unsigned size) +{ + AssignedDevice *adev = opaque; + uint64_t val; + + memcpy(&val, (void *)((uint8_t *)adev->msix_table + addr), size); + + return val; +} + +static void assigned_dev_msix_mmio_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + AssignedDevice *adev = opaque; + PCIDevice *pdev = &adev->dev; + uint16_t ctrl; + MSIXTableEntry orig; + int i = addr >> 4; + + if (i >= adev->msix_max) { + return; /* Drop write */ + } + + ctrl = pci_get_word(pdev->config + pdev->msix_cap + PCI_MSIX_FLAGS); + + DEBUG("write to MSI-X table offset 0x%lx, val 0x%lx\n", addr, val); + + if (ctrl & PCI_MSIX_FLAGS_ENABLE) { + orig = adev->msix_table[i]; + } + + memcpy((uint8_t *)adev->msix_table + addr, &val, size); + + if (ctrl & PCI_MSIX_FLAGS_ENABLE) { + MSIXTableEntry *entry = &adev->msix_table[i]; + + if (!assigned_dev_msix_masked(&orig) && + assigned_dev_msix_masked(entry)) { + /* + * Vector masked, disable it + * + * XXX It's not clear if we can or should actually attempt + * to mask or disable the interrupt. KVM doesn't have + * support for pending bits and kvm_assign_set_msix_entry + * doesn't modify the device hardware mask. Interrupts + * while masked are simply not injected to the guest, so + * are lost. Can we get away with always injecting an + * interrupt on unmask? + */ + } else if (assigned_dev_msix_masked(&orig) && + !assigned_dev_msix_masked(entry)) { + /* Vector unmasked */ + if (i >= adev->msi_virq_nr || adev->msi_virq[i] < 0) { + /* Previously unassigned vector, start from scratch */ + assigned_dev_update_msix(pdev); + return; + } else { + /* Update an existing, previously masked vector */ + MSIMessage msg; + int ret; + + msg.address = entry->addr_lo | + ((uint64_t)entry->addr_hi << 32); + msg.data = entry->data; + + ret = kvm_irqchip_update_msi_route(kvm_state, + adev->msi_virq[i], msg, + pdev); + if (ret) { + error_report("Error updating irq routing entry (%d)", ret); + } + } + } + } +} + +static const MemoryRegionOps assigned_dev_msix_mmio_ops = { + .read = assigned_dev_msix_mmio_read, + .write = assigned_dev_msix_mmio_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 8, + }, + .impl = { + .min_access_size = 4, + .max_access_size = 8, + }, +}; + +static void assigned_dev_msix_reset(AssignedDevice *dev) +{ + MSIXTableEntry *entry; + int i; + + if (!dev->msix_table) { + return; + } + + memset(dev->msix_table, 0, MSIX_PAGE_SIZE); + + for (i = 0, entry = dev->msix_table; i < dev->msix_max; i++, entry++) { + entry->ctrl = cpu_to_le32(0x1); /* Masked */ + } +} + +static void assigned_dev_register_msix_mmio(AssignedDevice *dev, Error **errp) +{ + dev->msix_table = mmap(NULL, MSIX_PAGE_SIZE, PROT_READ|PROT_WRITE, + MAP_ANONYMOUS|MAP_PRIVATE, 0, 0); + if (dev->msix_table == MAP_FAILED) { + error_setg_errno(errp, errno, "failed to allocate msix_table"); + dev->msix_table = NULL; + return; + } + + assigned_dev_msix_reset(dev); + + memory_region_init_io(&dev->mmio, OBJECT(dev), &assigned_dev_msix_mmio_ops, + dev, "assigned-dev-msix", MSIX_PAGE_SIZE); +} + +static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev) +{ + if (!dev->msix_table) { + return; + } + + if (munmap(dev->msix_table, MSIX_PAGE_SIZE) == -1) { + error_report("error unmapping msix_table! %s", strerror(errno)); + } + dev->msix_table = NULL; +} + +static const VMStateDescription vmstate_assigned_device = { + .name = "pci-assign", + .unmigratable = 1, +}; + +static void reset_assigned_device(DeviceState *dev) +{ + PCIDevice *pci_dev = PCI_DEVICE(dev); + AssignedDevice *adev = PCI_ASSIGN(pci_dev); + char reset_file[64]; + const char reset[] = "1"; + int fd, ret; + + /* + * If a guest is reset without being shutdown, MSI/MSI-X can still + * be running. We want to return the device to a known state on + * reset, so disable those here. We especially do not want MSI-X + * enabled since it lives in MMIO space, which is about to get + * disabled. + */ + if (adev->assigned_irq_type == ASSIGNED_IRQ_MSIX) { + uint16_t ctrl = pci_get_word(pci_dev->config + + pci_dev->msix_cap + PCI_MSIX_FLAGS); + + pci_set_word(pci_dev->config + pci_dev->msix_cap + PCI_MSIX_FLAGS, + ctrl & ~PCI_MSIX_FLAGS_ENABLE); + assigned_dev_update_msix(pci_dev); + } else if (adev->assigned_irq_type == ASSIGNED_IRQ_MSI) { + uint8_t ctrl = pci_get_byte(pci_dev->config + + pci_dev->msi_cap + PCI_MSI_FLAGS); + + pci_set_byte(pci_dev->config + pci_dev->msi_cap + PCI_MSI_FLAGS, + ctrl & ~PCI_MSI_FLAGS_ENABLE); + assigned_dev_update_msi(pci_dev); + } + + snprintf(reset_file, sizeof(reset_file), + "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/reset", + adev->host.domain, adev->host.bus, adev->host.slot, + adev->host.function); + + /* + * Issue a device reset via pci-sysfs. Note that we use write(2) here + * and ignore the return value because some kernels have a bug that + * returns 0 rather than bytes written on success, sending us into an + * infinite retry loop using other write mechanisms. + */ + fd = open(reset_file, O_WRONLY); + if (fd != -1) { + ret = write(fd, reset, strlen(reset)); + (void)ret; + close(fd); + } + + /* + * When a 0 is written to the bus master register, the device is logically + * disconnected from the PCI bus. This avoids further DMA transfers. + */ + assigned_dev_pci_write_config(pci_dev, PCI_COMMAND, 0, 1); +} + +static void assigned_realize(struct PCIDevice *pci_dev, Error **errp) +{ + AssignedDevice *dev = PCI_ASSIGN(pci_dev); + uint8_t e_intx; + int r; + Error *local_err = NULL; + + if (!kvm_enabled()) { + error_setg(&local_err, "pci-assign requires KVM support"); + goto exit_with_error; + } + + if (!dev->host.domain && !dev->host.bus && !dev->host.slot && + !dev->host.function) { + error_setg(&local_err, "no host device specified"); + goto exit_with_error; + } + + /* + * Set up basic config space access control. Will be further refined during + * device initialization. + */ + assigned_dev_emulate_config_read(dev, 0, PCI_CONFIG_SPACE_SIZE); + assigned_dev_direct_config_read(dev, PCI_STATUS, 2); + assigned_dev_direct_config_read(dev, PCI_REVISION_ID, 1); + assigned_dev_direct_config_read(dev, PCI_CLASS_PROG, 3); + assigned_dev_direct_config_read(dev, PCI_CACHE_LINE_SIZE, 1); + assigned_dev_direct_config_read(dev, PCI_LATENCY_TIMER, 1); + assigned_dev_direct_config_read(dev, PCI_BIST, 1); + assigned_dev_direct_config_read(dev, PCI_CARDBUS_CIS, 4); + assigned_dev_direct_config_read(dev, PCI_SUBSYSTEM_VENDOR_ID, 2); + assigned_dev_direct_config_read(dev, PCI_SUBSYSTEM_ID, 2); + assigned_dev_direct_config_read(dev, PCI_CAPABILITY_LIST + 1, 7); + assigned_dev_direct_config_read(dev, PCI_MIN_GNT, 1); + assigned_dev_direct_config_read(dev, PCI_MAX_LAT, 1); + memcpy(dev->emulate_config_write, dev->emulate_config_read, + sizeof(dev->emulate_config_read)); + + get_real_device(dev, &local_err); + if (local_err) { + goto out; + } + + if (assigned_device_pci_cap_init(pci_dev, &local_err) < 0) { + goto out; + } + + /* intercept MSI-X entry page in the MMIO */ + if (dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) { + assigned_dev_register_msix_mmio(dev, &local_err); + if (local_err) { + goto out; + } + } + + /* handle real device's MMIO/PIO BARs */ + assigned_dev_register_regions(dev->real_device.regions, + dev->real_device.region_number, dev, + &local_err); + if (local_err) { + goto out; + } + + /* handle interrupt routing */ + e_intx = dev->dev.config[PCI_INTERRUPT_PIN] - 1; + dev->intpin = e_intx; + dev->intx_route.mode = PCI_INTX_DISABLED; + dev->intx_route.irq = -1; + + /* assign device to guest */ + assign_device(dev, &local_err); + if (local_err) { + goto out; + } + + /* assign legacy INTx to the device */ + r = assign_intx(dev, &local_err); + if (r < 0) { + goto assigned_out; + } + + assigned_dev_load_option_rom(dev); + + return; + +assigned_out: + deassign_device(dev); + +out: + free_assigned_device(dev); + +exit_with_error: + assert(local_err); + error_propagate(errp, local_err); +} + +static void assigned_exitfn(struct PCIDevice *pci_dev) +{ + AssignedDevice *dev = PCI_ASSIGN(pci_dev); + + deassign_device(dev); + free_assigned_device(dev); +} + +static void assigned_dev_instance_init(Object *obj) +{ + PCIDevice *pci_dev = PCI_DEVICE(obj); + AssignedDevice *d = PCI_ASSIGN(pci_dev); + + device_add_bootindex_property(obj, &d->bootindex, + "bootindex", NULL, + &pci_dev->qdev, NULL); +} + +static Property assigned_dev_properties[] = { + DEFINE_PROP_PCI_HOST_DEVADDR("host", AssignedDevice, host), + DEFINE_PROP_BIT("prefer_msi", AssignedDevice, features, + ASSIGNED_DEVICE_PREFER_MSI_BIT, false), + DEFINE_PROP_BIT("share_intx", AssignedDevice, features, + ASSIGNED_DEVICE_SHARE_INTX_BIT, true), + DEFINE_PROP_STRING("configfd", AssignedDevice, configfd_name), + DEFINE_PROP_END_OF_LIST(), +}; + +static void assign_class_init(ObjectClass *klass, void *data) +{ + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + k->realize = assigned_realize; + k->exit = assigned_exitfn; + k->config_read = assigned_dev_pci_read_config; + k->config_write = assigned_dev_pci_write_config; + dc->props = assigned_dev_properties; + dc->vmsd = &vmstate_assigned_device; + dc->reset = reset_assigned_device; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); + dc->desc = "KVM-based PCI passthrough"; +} + +static const TypeInfo assign_info = { + .name = TYPE_PCI_ASSIGN, + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(AssignedDevice), + .class_init = assign_class_init, + .instance_init = assigned_dev_instance_init, +}; + +static void assign_register_types(void) +{ + type_register_static(&assign_info); +} + +type_init(assign_register_types) + +static void assigned_dev_load_option_rom(AssignedDevice *dev) +{ + int size = 0; + + pci_assign_dev_load_option_rom(&dev->dev, OBJECT(dev), &size, + dev->host.domain, dev->host.bus, + dev->host.slot, dev->host.function); + + if (!size) { + error_report("pci-assign: Invalid ROM."); + } +} |
