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[Qemu-devel] [PATCH 19/20] kvm: x86: Add user space part for in-kernel I
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 19/20] kvm: x86: Add user space part for in-kernel IOAPIC |
Date: |
Fri, 20 Jan 2012 15:26:45 -0200 |
From: Jan Kiszka <address@hidden>
This introduces the KVM-accelerated IOAPIC model 'kvm-ioapic' and
extends the IRQ routing setup by the 0->2 redirection when needed.
The kvm-ioapic model has a property that allows to define its GSI base
for injecting interrupts into the kernel model. This will allow to
disentangle PIC and IOAPIC pins for chipsets that support more
sophisticated IRQ routes than the PIIX3. So far the base is kept at 0,
i.e. PIC and IOAPIC share pins 0..15.
Signed-off-by: Jan Kiszka <address@hidden>
---
Makefile.target | 2 +-
hw/kvm/ioapic.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/pc_piix.c | 15 +++++++-
3 files changed, 129 insertions(+), 2 deletions(-)
create mode 100644 hw/kvm/ioapic.c
diff --git a/Makefile.target b/Makefile.target
index 701073d..98cb997 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -233,7 +233,7 @@ obj-i386-y += vmport.o
obj-i386-y += pci-hotplug.o smbios.o wdt_ib700.o
obj-i386-y += debugcon.o multiboot.o
obj-i386-y += pc_piix.o
-obj-i386-$(CONFIG_KVM) += kvm/clock.o kvm/apic.o kvm/i8259.o
+obj-i386-$(CONFIG_KVM) += kvm/clock.o kvm/apic.o kvm/i8259.o kvm/ioapic.o
obj-i386-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o
# shared objects
diff --git a/hw/kvm/ioapic.c b/hw/kvm/ioapic.c
new file mode 100644
index 0000000..10ffdd4
--- /dev/null
+++ b/hw/kvm/ioapic.c
@@ -0,0 +1,114 @@
+/*
+ * KVM in-kernel IOPIC support
+ *
+ * Copyright (c) 2011 Siemens AG
+ *
+ * Authors:
+ * Jan Kiszka <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "hw/pc.h"
+#include "hw/ioapic_internal.h"
+#include "hw/apic_internal.h"
+#include "kvm.h"
+
+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();
+ }
+}
+
+static void kvm_ioapic_reset(DeviceState *dev)
+{
+ IOAPICCommonState *s = DO_UPCAST(IOAPICCommonState, busdev.qdev, 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_irqchip_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
+ apic_report_irq_delivered(delivered);
+}
+
+static void kvm_ioapic_init(IOAPICCommonState *s, int instance_no)
+{
+ memory_region_init_reservation(&s->io_memory, "kvm-ioapic", 0x1000);
+
+ qdev_init_gpio_in(&s->busdev.qdev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
+}
+
+static IOAPICCommonInfo kvm_ioapic_info = {
+ .busdev.qdev.name = "kvm-ioapic",
+ .busdev.qdev.size = sizeof(KVMIOAPICState),
+ .busdev.qdev.reset = kvm_ioapic_reset,
+ .busdev.qdev.props = (Property[]) {
+ DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
+ DEFINE_PROP_END_OF_LIST()
+ },
+ .init = kvm_ioapic_init,
+ .pre_save = kvm_ioapic_get,
+ .post_load = kvm_ioapic_put,
+};
+
+static void kvm_ioapic_register_device(void)
+{
+ ioapic_qdev_register(&kvm_ioapic_info);
+}
+
+device_init(kvm_ioapic_register_device)
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index 297c04a..a285ad2 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -69,6 +69,15 @@ static void kvm_piix3_setup_irq_routing(bool pci_enabled)
for (i = 8; i < 16; ++i) {
kvm_irqchip_add_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8);
}
+ if (pci_enabled) {
+ for (i = 0; i < 24; ++i) {
+ if (i == 0) {
+ kvm_irqchip_add_route(s, i, KVM_IRQCHIP_IOAPIC, 2);
+ } else if (i != 2) {
+ kvm_irqchip_add_route(s, i, KVM_IRQCHIP_IOAPIC, i);
+ }
+ }
+ }
ret = kvm_irqchip_commit_routes(s);
if (ret < 0) {
hw_error("KVM IRQ routing setup failed");
@@ -95,7 +104,11 @@ static void ioapic_init(GSIState *gsi_state)
SysBusDevice *d;
unsigned int i;
- dev = qdev_create(NULL, "ioapic");
+ if (kvm_enabled() && kvm_irqchip_in_kernel()) {
+ dev = qdev_create(NULL, "kvm-ioapic");
+ } else {
+ dev = qdev_create(NULL, "ioapic");
+ }
qdev_init_nofail(dev);
d = sysbus_from_qdev(dev);
sysbus_mmio_map(d, 0, 0xfec00000);
--
1.7.6.4
- [Qemu-devel] [PATCH 07/20] apic: Introduce apic_report_irq_delivered, (continued)
- [Qemu-devel] [PATCH 07/20] apic: Introduce apic_report_irq_delivered, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 04/20] kvm: Move kvmclock into hw/kvm folder, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 12/20] ioapic: Drop post-load irr initialization, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 20/20] kvm: Activate in-kernel irqchip support, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 06/20] apic: Inject external NMI events via LINT1, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 03/20] msi: Generalize msix_supported to msi_supported, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 17/20] kvm: x86: Add user space part for in-kernel APIC, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 01/20] hyper-v: introduce Hyper-V support infrastructure., Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 08/20] apic: Factor out base class for KVM reuse, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 11/20] i8259: Factor out base class for KVM reuse, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 19/20] kvm: x86: Add user space part for in-kernel IOAPIC,
Marcelo Tosatti <=
- [Qemu-devel] [PATCH 18/20] kvm: x86: Add user space part for in-kernel i8259, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 13/20] ioapic: Factor out base class for KVM reuse, Marcelo Tosatti, 2012/01/20
- Re: [Qemu-devel] [PATCH 00/20] [PULL] qemu-kvm.git uq/master queue, Anthony Liguori, 2012/01/23