diff options
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/Makefile | 2 | ||||
| -rw-r--r-- | drivers/kvm/ioapic.c | 388 | ||||
| -rw-r--r-- | drivers/kvm/irq.c | 4 | ||||
| -rw-r--r-- | drivers/kvm/irq.h | 51 | ||||
| -rw-r--r-- | drivers/kvm/kvm.h | 6 | ||||
| -rw-r--r-- | drivers/kvm/kvm_main.c | 15 |
6 files changed, 458 insertions, 8 deletions
diff --git a/drivers/kvm/Makefile b/drivers/kvm/Makefile index 3bf7276b032..e5a8f4d3e97 100644 --- a/drivers/kvm/Makefile +++ b/drivers/kvm/Makefile @@ -2,7 +2,7 @@ # Makefile for Kernel-based Virtual Machine module # -kvm-objs := kvm_main.o mmu.o x86_emulate.o i8259.o irq.o lapic.o +kvm-objs := kvm_main.o mmu.o x86_emulate.o i8259.o irq.o lapic.o ioapic.o obj-$(CONFIG_KVM) += kvm.o kvm-intel-objs = vmx.o obj-$(CONFIG_KVM_INTEL) += kvm-intel.o diff --git a/drivers/kvm/ioapic.c b/drivers/kvm/ioapic.c new file mode 100644 index 00000000000..c7992e667fd --- /dev/null +++ b/drivers/kvm/ioapic.c @@ -0,0 +1,388 @@ +/* + * Copyright (C) 2001 MandrakeSoft S.A. + * + * MandrakeSoft S.A. + * 43, rue d'Aboukir + * 75002 Paris - France + * http://www.linux-mandrake.com/ + * http://www.mandrakesoft.com/ + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Yunhong Jiang <yunhong.jiang@intel.com> + * Yaozu (Eddie) Dong <eddie.dong@intel.com> + * Based on Xen 3.1 code. + */ + +#include "kvm.h" +#include <linux/kvm.h> +#include <linux/mm.h> +#include <linux/highmem.h> +#include <linux/smp.h> +#include <linux/hrtimer.h> +#include <linux/io.h> +#include <asm/processor.h> +#include <asm/msr.h> +#include <asm/page.h> +#include <asm/current.h> +#include <asm/apicdef.h> +#include <asm/io_apic.h> +#include "irq.h" +/* #define ioapic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */ +#define ioapic_debug(fmt, arg...) +static void ioapic_deliver(struct kvm_ioapic *vioapic, int irq); + +static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic, + unsigned long addr, + unsigned long length) +{ + unsigned long result = 0; + + switch (ioapic->ioregsel) { + case IOAPIC_REG_VERSION: + result = ((((IOAPIC_NUM_PINS - 1) & 0xff) << 16) + | (IOAPIC_VERSION_ID & 0xff)); + break; + + case IOAPIC_REG_APIC_ID: + case IOAPIC_REG_ARB_ID: + result = ((ioapic->id & 0xf) << 24); + break; + + default: + { + u32 redir_index = (ioapic->ioregsel - 0x10) >> 1; + u64 redir_content; + + ASSERT(redir_index < IOAPIC_NUM_PINS); + + redir_content = ioapic->redirtbl[redir_index].bits; + result = (ioapic->ioregsel & 0x1) ? + (redir_content >> 32) & 0xffffffff : + redir_content & 0xffffffff; + break; + } + } + + return result; +} + +static void ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx) +{ + union ioapic_redir_entry *pent; + + pent = &ioapic->redirtbl[idx]; + + if (!pent->fields.mask) { + ioapic_deliver(ioapic, idx); + if (pent->fields.trig_mode == IOAPIC_LEVEL_TRIG) + pent->fields.remote_irr = 1; + } + if (!pent->fields.trig_mode) + ioapic->irr &= ~(1 << idx); +} + +static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val) +{ + unsigned index; + + switch (ioapic->ioregsel) { + case IOAPIC_REG_VERSION: + /* Writes are ignored. */ + break; + + case IOAPIC_REG_APIC_ID: + ioapic->id = (val >> 24) & 0xf; + break; + + case IOAPIC_REG_ARB_ID: + break; + + default: + index = (ioapic->ioregsel - 0x10) >> 1; + + ioapic_debug("change redir index %x val %x", index, val); + if (index >= IOAPIC_NUM_PINS) + return; + if (ioapic->ioregsel & 1) { + ioapic->redirtbl[index].bits &= 0xffffffff; + ioapic->redirtbl[index].bits |= (u64) val << 32; + } else { + ioapic->redirtbl[index].bits &= ~0xffffffffULL; + ioapic->redirtbl[index].bits |= (u32) val; + ioapic->redirtbl[index].fields.remote_irr = 0; + } + if (ioapic->irr & (1 << index)) + ioapic_service(ioapic, index); + break; + } +} + +static void ioapic_inj_irq(struct kvm_ioapic *ioapic, + struct kvm_lapic *target, + u8 vector, u8 trig_mode, u8 delivery_mode) +{ + ioapic_debug("irq %d trig %d deliv %d", vector, trig_mode, + delivery_mode); + + ASSERT((delivery_mode == dest_Fixed) || + (delivery_mode == dest_LowestPrio)); + + kvm_apic_set_irq(target, vector, trig_mode); +} + +static u32 ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest, + u8 dest_mode) +{ + u32 mask = 0; + int i; + struct kvm *kvm = ioapic->kvm; + struct kvm_vcpu *vcpu; + + ioapic_debug("dest %d dest_mode %d", dest, dest_mode); + + if (dest_mode == 0) { /* Physical mode. */ + if (dest == 0xFF) { /* Broadcast. */ + for (i = 0; i < KVM_MAX_VCPUS; ++i) + if (kvm->vcpus[i] && kvm->vcpus[i]->apic) + mask |= 1 << i; + return mask; + } + for (i = 0; i < KVM_MAX_VCPUS; ++i) { + vcpu = kvm->vcpus[i]; + if (!vcpu) + continue; + if (kvm_apic_match_physical_addr(vcpu->apic, dest)) { + if (vcpu->apic) + mask = 1 << i; + break; + } + } + } else if (dest != 0) /* Logical mode, MDA non-zero. */ + for (i = 0; i < KVM_MAX_VCPUS; ++i) { + vcpu = kvm->vcpus[i]; + if (!vcpu) + continue; + if (vcpu->apic && + kvm_apic_match_logical_addr(vcpu->apic, dest)) + mask |= 1 << vcpu->vcpu_id; + } + ioapic_debug("mask %x", mask); + return mask; +} + +static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq) +{ + u8 dest = ioapic->redirtbl[irq].fields.dest_id; + u8 dest_mode = ioapic->redirtbl[irq].fields.dest_mode; + u8 delivery_mode = ioapic->redirtbl[irq].fields.delivery_mode; + u8 vector = ioapic->redirtbl[irq].fields.vector; + u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode; + u32 deliver_bitmask; + struct kvm_lapic *target; + struct kvm_vcpu *vcpu; + int vcpu_id; + + ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x " + "vector=%x trig_mode=%x", + dest, dest_mode, delivery_mode, vector, trig_mode); + + deliver_bitmask = ioapic_get_delivery_bitmask(ioapic, dest, dest_mode); + if (!deliver_bitmask) { + ioapic_debug("no target on destination"); + return; + } + + switch (delivery_mode) { + case dest_LowestPrio: + target = + kvm_apic_round_robin(ioapic->kvm, vector, deliver_bitmask); + if (target != NULL) + ioapic_inj_irq(ioapic, target, vector, + trig_mode, delivery_mode); + else + ioapic_debug("null round robin: " + "mask=%x vector=%x delivery_mode=%x", + deliver_bitmask, vector, dest_LowestPrio); + break; + case dest_Fixed: + for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) { + if (!(deliver_bitmask & (1 << vcpu_id))) + continue; + deliver_bitmask &= ~(1 << vcpu_id); + vcpu = ioapic->kvm->vcpus[vcpu_id]; + if (vcpu) { + target = vcpu->apic; + ioapic_inj_irq(ioapic, target, vector, + trig_mode, delivery_mode); + } + } + break; + + /* TODO: NMI */ + default: + printk(KERN_WARNING "Unsupported delivery mode %d\n", + delivery_mode); + break; + } +} + +void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level) +{ + u32 old_irr = ioapic->irr; + u32 mask = 1 << irq; + union ioapic_redir_entry entry; + + if (irq >= 0 && irq < IOAPIC_NUM_PINS) { + entry = ioapic->redirtbl[irq]; + level ^= entry.fields.polarity; + if (!level) + ioapic->irr &= ~mask; + else { + ioapic->irr |= mask; + if ((!entry.fields.trig_mode && old_irr != ioapic->irr) + || !entry.fields.remote_irr) + ioapic_service(ioapic, irq); + } + } +} + +static int get_eoi_gsi(struct kvm_ioapic *ioapic, int vector) +{ + int i; + + for (i = 0; i < IOAPIC_NUM_PINS; i++) + if (ioapic->redirtbl[i].fields.vector == vector) + return i; + return -1; +} + +void kvm_ioapic_update_eoi(struct kvm *kvm, int vector) +{ + struct kvm_ioapic *ioapic = kvm->vioapic; + union ioapic_redir_entry *ent; + int gsi; + + gsi = get_eoi_gsi(ioapic, vector); + if (gsi == -1) { + printk(KERN_WARNING "Can't find redir item for %d EOI\n", + vector); + return; + } + + ent = &ioapic->redirtbl[gsi]; + ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG); + + ent->fields.remote_irr = 0; + if (!ent->fields.mask && (ioapic->irr & (1 << gsi))) + ioapic_deliver(ioapic, gsi); +} + +static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr) +{ + struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; + + return ((addr >= ioapic->base_address && + (addr < ioapic->base_address + IOAPIC_MEM_LENGTH))); +} + +static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len, + void *val) +{ + struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; + u32 result; + + ioapic_debug("addr %lx", (unsigned long)addr); + ASSERT(!(addr & 0xf)); /* check alignment */ + + addr &= 0xff; + switch (addr) { + case IOAPIC_REG_SELECT: + result = ioapic->ioregsel; + break; + + case IOAPIC_REG_WINDOW: + result = ioapic_read_indirect(ioapic, addr, len); + break; + + default: + result = 0; + break; + } + switch (len) { + case 8: + *(u64 *) val = result; + break; + case 1: + case 2: + case 4: + memcpy(val, (char *)&result, len); + break; + default: + printk(KERN_WARNING "ioapic: wrong length %d\n", len); + } +} + +static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len, + const void *val) +{ + struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private; + u32 data; + + ioapic_debug("ioapic_mmio_write addr=%lx len=%d val=%p\n", + addr, len, val); + ASSERT(!(addr & 0xf)); /* check alignment */ + if (len == 4 || len == 8) + data = *(u32 *) val; + else { + printk(KERN_WARNING "ioapic: Unsupported size %d\n", len); + return; + } + + addr &= 0xff; + switch (addr) { + case IOAPIC_REG_SELECT: + ioapic->ioregsel = data; + break; + + case IOAPIC_REG_WINDOW: + ioapic_write_indirect(ioapic, data); + break; + + default: + break; + } +} + +int kvm_ioapic_init(struct kvm *kvm) +{ + struct kvm_ioapic *ioapic; + int i; + + ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL); + if (!ioapic) + return -ENOMEM; + kvm->vioapic = ioapic; + for (i = 0; i < IOAPIC_NUM_PINS; i++) + ioapic->redirtbl[i].fields.mask = 1; + ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS; + ioapic->dev.read = ioapic_mmio_read; + ioapic->dev.write = ioapic_mmio_write; + ioapic->dev.in_range = ioapic_in_range; + ioapic->dev.private = ioapic; + ioapic->kvm = kvm; + kvm_io_bus_register_dev(&kvm->mmio_bus, &ioapic->dev); + return 0; +} diff --git a/drivers/kvm/irq.c b/drivers/kvm/irq.c index 0b4430a0cae..5265f8267b3 100644 --- a/drivers/kvm/irq.c +++ b/drivers/kvm/irq.c @@ -74,7 +74,3 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu) smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0); } -void kvm_ioapic_update_eoi(struct kvm *kvm, int vector) -{ - /* TODO: for kernel IOAPIC */ -} diff --git a/drivers/kvm/irq.h b/drivers/kvm/irq.h index 57e23bdac53..6ed856a41e2 100644 --- a/drivers/kvm/irq.h +++ b/drivers/kvm/irq.h @@ -60,6 +60,50 @@ int kvm_pic_read_irq(struct kvm_pic *s); int kvm_cpu_get_interrupt(struct kvm_vcpu *v); int kvm_cpu_has_interrupt(struct kvm_vcpu *v); +#define IOAPIC_NUM_PINS 24 +#define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */ +#define IOAPIC_EDGE_TRIG 0 +#define IOAPIC_LEVEL_TRIG 1 + +#define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000 +#define IOAPIC_MEM_LENGTH 0x100 + +/* Direct registers. */ +#define IOAPIC_REG_SELECT 0x00 +#define IOAPIC_REG_WINDOW 0x10 +#define IOAPIC_REG_EOI 0x40 /* IA64 IOSAPIC only */ + +/* Indirect registers. */ +#define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */ +#define IOAPIC_REG_VERSION 0x01 +#define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */ + +struct kvm_ioapic { + u64 base_address; + u32 ioregsel; + u32 id; + u32 irr; + u32 pad; + union ioapic_redir_entry { + u64 bits; + struct { + u8 vector; + u8 delivery_mode:3; + u8 dest_mode:1; + u8 delivery_status:1; + u8 polarity:1; + u8 remote_irr:1; + u8 trig_mode:1; + u8 mask:1; + u8 reserve:7; + u8 reserved[4]; + u8 dest_id; + } fields; + } redirtbl[IOAPIC_NUM_PINS]; + struct kvm_io_device dev; + struct kvm *kvm; +}; + struct kvm_lapic { unsigned long base_address; struct kvm_io_device dev; @@ -96,8 +140,15 @@ void kvm_free_apic(struct kvm_lapic *apic); u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu); void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8); void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value); +struct kvm_lapic *kvm_apic_round_robin(struct kvm *kvm, u8 vector, + unsigned long bitmap); u64 kvm_get_apic_base(struct kvm_vcpu *vcpu); void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data); +int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest); void kvm_ioapic_update_eoi(struct kvm *kvm, int vector); +int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda); +int kvm_apic_set_irq(struct kvm_lapic *apic, u8 vec, u8 trig); +int kvm_ioapic_init(struct kvm *kvm); +void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level); #endif diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index a5790cb21ff..8d07a993af9 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -410,6 +410,7 @@ struct kvm { struct kvm_io_bus mmio_bus; struct kvm_io_bus pio_bus; struct kvm_pic *vpic; + struct kvm_ioapic *vioapic; }; static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) @@ -417,6 +418,11 @@ static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) return kvm->vpic; } +static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm) +{ + return kvm->vioapic; +} + static inline int irqchip_in_kernel(struct kvm *kvm) { return pic_irqchip(kvm) != 0; diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 401e3cdc460..ffbdadd8797 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -381,6 +381,7 @@ static void kvm_destroy_vm(struct kvm *kvm) kvm_io_bus_destroy(&kvm->pio_bus); kvm_io_bus_destroy(&kvm->mmio_bus); kfree(kvm->vpic); + kfree(kvm->vioapic); kvm_free_vcpus(kvm); kvm_free_physmem(kvm); kfree(kvm); @@ -2771,8 +2772,14 @@ static long kvm_vm_ioctl(struct file *filp, case KVM_CREATE_IRQCHIP: r = -ENOMEM; kvm->vpic = kvm_create_pic(kvm); - if (kvm->vpic) - r = 0; + if (kvm->vpic) { + r = kvm_ioapic_init(kvm); + if (r) { + kfree(kvm->vpic); + kvm->vpic = NULL; + goto out; + } + } else goto out; break; @@ -2787,7 +2794,9 @@ static long kvm_vm_ioctl(struct file *filp, kvm_pic_set_irq(pic_irqchip(kvm), irq_event.irq, irq_event.level); - /* TODO: IOAPIC */ + kvm_ioapic_set_irq(kvm->vioapic, + irq_event.irq, + irq_event.level); r = 0; } break; |