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microvm: add second ioapic 

Create second ioapic, route virtio-mmio IRQs to it,
allow more virtio-mmio devices (24 instead of 8).

Needs ACPI, enabled by default, can be turned off
using -machine ioapic2=off

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-id: 20201203105423.10431-8-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2020-12-03 11:54:18 +01:00
parent e57e9ae799
commit 4d01b8994c
3 changed files with 57 additions and 9 deletions
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56
hw/i386/microvm.c
View File

@ -145,32 +145,53 @@ static void create_gpex(MicrovmMachineState *mms)
}
}
static int microvm_ioapics(MicrovmMachineState *mms)
{
if (!x86_machine_is_acpi_enabled(X86_MACHINE(mms))) {
return 1;
}
if (mms->ioapic2 == ON_OFF_AUTO_OFF) {
return 1;
}
return 2;
}
static void microvm_devices_init(MicrovmMachineState *mms)
{
X86MachineState *x86ms = X86_MACHINE(mms);
ISABus *isa_bus;
ISADevice *rtc_state;
GSIState *gsi_state;
int ioapics;
int i;
/* Core components */
ioapics = microvm_ioapics(mms);
gsi_state = g_malloc0(sizeof(*gsi_state));
x86ms->gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS);
x86ms->gsi = qemu_allocate_irqs(gsi_handler, gsi_state,
IOAPIC_NUM_PINS * ioapics);
isa_bus = isa_bus_new(NULL, get_system_memory(), get_system_io(),
&error_abort);
isa_bus_irqs(isa_bus, x86ms->gsi);
ioapic_init_gsi(gsi_state, "machine");
if (ioapics > 1) {
x86ms->ioapic2 = ioapic_init_secondary(gsi_state);
}
kvmclock_create(true);
mms->virtio_irq_base = 5;
mms->virtio_num_transports = 8;
if (x86_machine_is_acpi_enabled(x86ms)) {
mms->pcie_irq_base = 12;
mms->virtio_irq_base = 16;
if (x86ms->ioapic2) {
mms->pcie_irq_base = 16; /* 16 -> 19 */
/* use second ioapic (24 -> 47) for virtio-mmio irq lines */
mms->virtio_irq_base = IO_APIC_SECONDARY_IRQBASE;
mms->virtio_num_transports = IOAPIC_NUM_PINS;
} else if (x86_machine_is_acpi_enabled(x86ms)) {
mms->pcie_irq_base = 12; /* 12 -> 15 */
mms->virtio_irq_base = 16; /* 16 -> 23 */
}
for (i = 0; i < mms->virtio_num_transports; i++) {
@ -544,6 +565,23 @@ static void microvm_machine_set_pcie(Object *obj, Visitor *v, const char *name,
visit_type_OnOffAuto(v, name, &mms->pcie, errp);
}
static void microvm_machine_get_ioapic2(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
MicrovmMachineState *mms = MICROVM_MACHINE(obj);
OnOffAuto ioapic2 = mms->ioapic2;
visit_type_OnOffAuto(v, name, &ioapic2, errp);
}
static void microvm_machine_set_ioapic2(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
MicrovmMachineState *mms = MICROVM_MACHINE(obj);
visit_type_OnOffAuto(v, name, &mms->ioapic2, errp);
}
static bool microvm_machine_get_isa_serial(Object *obj, Error **errp)
{
MicrovmMachineState *mms = MICROVM_MACHINE(obj);
@ -620,6 +658,7 @@ static void microvm_machine_initfn(Object *obj)
mms->pit = ON_OFF_AUTO_AUTO;
mms->rtc = ON_OFF_AUTO_AUTO;
mms->pcie = ON_OFF_AUTO_AUTO;
mms->ioapic2 = ON_OFF_AUTO_AUTO;
mms->isa_serial = true;
mms->option_roms = true;
mms->auto_kernel_cmdline = true;
@ -693,6 +732,13 @@ static void microvm_class_init(ObjectClass *oc, void *data)
object_class_property_set_description(oc, MICROVM_MACHINE_PCIE,
"Enable PCIe");
object_class_property_add(oc, MICROVM_MACHINE_IOAPIC2, "OnOffAuto",
microvm_machine_get_ioapic2,
microvm_machine_set_ioapic2,
NULL, NULL);
object_class_property_set_description(oc, MICROVM_MACHINE_IOAPIC2,
"Enable second IO-APIC");
object_class_property_add_bool(oc, MICROVM_MACHINE_ISA_SERIAL,
microvm_machine_get_isa_serial,
microvm_machine_set_isa_serial);

2
include/hw/i386/microvm.h
View File

@ -72,6 +72,7 @@
#define MICROVM_MACHINE_PIC "pic"
#define MICROVM_MACHINE_RTC "rtc"
#define MICROVM_MACHINE_PCIE "pcie"
#define MICROVM_MACHINE_IOAPIC2 "ioapic2"
#define MICROVM_MACHINE_ISA_SERIAL "isa-serial"
#define MICROVM_MACHINE_OPTION_ROMS "x-option-roms"
#define MICROVM_MACHINE_AUTO_KERNEL_CMDLINE "auto-kernel-cmdline"
@ -90,6 +91,7 @@ struct MicrovmMachineState {
OnOffAuto pit;
OnOffAuto rtc;
OnOffAuto pcie;
OnOffAuto ioapic2;
bool isa_serial;
bool option_roms;
bool auto_kernel_cmdline;

8
tests/qtest/bios-tables-test.c
View File

@ -1124,7 +1124,7 @@ static void test_acpi_microvm_tcg(void)
test_data data;
test_acpi_microvm_prepare(&data);
test_acpi_one(" -machine microvm,acpi=on,rtc=off",
test_acpi_one(" -machine microvm,acpi=on,ioapic2=off,rtc=off",
&data);
free_test_data(&data);
}
@ -1135,7 +1135,7 @@ static void test_acpi_microvm_usb_tcg(void)
test_acpi_microvm_prepare(&data);
data.variant = ".usb";
test_acpi_one(" -machine microvm,acpi=on,usb=on,rtc=off",
test_acpi_one(" -machine microvm,acpi=on,ioapic2=off,usb=on,rtc=off",
&data);
free_test_data(&data);
}
@ -1146,7 +1146,7 @@ static void test_acpi_microvm_rtc_tcg(void)
test_acpi_microvm_prepare(&data);
data.variant = ".rtc";
test_acpi_one(" -machine microvm,acpi=on,rtc=on",
test_acpi_one(" -machine microvm,acpi=on,ioapic2=off,rtc=on",
&data);
free_test_data(&data);
}
@ -1158,7 +1158,7 @@ static void test_acpi_microvm_pcie_tcg(void)
test_acpi_microvm_prepare(&data);
data.variant = ".pcie";
data.tcg_only = true; /* need constant host-phys-bits */
test_acpi_one(" -machine microvm,acpi=on,rtc=off,pcie=on",
test_acpi_one(" -machine microvm,acpi=on,ioapic2=off,rtc=off,pcie=on",
&data);
free_test_data(&data);
}