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hw/arm/virt: add ITS support in virt GIC 

Included creation of ITS as part of virt platform GIC
initialization. This Emulated ITS model now co-exists with kvm
ITS and is enabled in absence of kvm irq kernel support in a
platform.

Signed-off-by: Shashi Mallela <shashi.mallela@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20210910143951.92242-9-shashi.mallela@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Shashi Mallela 2021-09-13 16:07:24 +01:00 committed by Peter Maydell
parent d7830a9bdd
commit 0e5c1c9a23
3 changed files with 31 additions and 4 deletions
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29
hw/arm/virt.c
View File

@ -584,6 +584,12 @@ static void create_its(VirtMachineState *vms)
const char *itsclass = its_class_name();
DeviceState *dev;
if (!strcmp(itsclass, "arm-gicv3-its")) {
if (!vms->tcg_its) {
itsclass = NULL;
}
}
if (!itsclass) {
/* Do nothing if not supported */
return;
@ -621,7 +627,7 @@ static void create_v2m(VirtMachineState *vms)
vms->msi_controller = VIRT_MSI_CTRL_GICV2M;
}
static void create_gic(VirtMachineState *vms)
static void create_gic(VirtMachineState *vms, MemoryRegion *mem)
{
MachineState *ms = MACHINE(vms);
/* We create a standalone GIC */
@ -655,6 +661,14 @@ static void create_gic(VirtMachineState *vms)
nb_redist_regions);
qdev_prop_set_uint32(vms->gic, "redist-region-count[0]", redist0_count);
if (!kvm_irqchip_in_kernel()) {
if (vms->tcg_its) {
object_property_set_link(OBJECT(vms->gic), "sysmem",
OBJECT(mem), &error_fatal);
qdev_prop_set_bit(vms->gic, "has-lpi", true);
}
}
if (nb_redist_regions == 2) {
uint32_t redist1_capacity =
vms->memmap[VIRT_HIGH_GIC_REDIST2].size / GICV3_REDIST_SIZE;
@ -2039,7 +2053,7 @@ static void machvirt_init(MachineState *machine)
virt_flash_fdt(vms, sysmem, secure_sysmem ?: sysmem);
create_gic(vms);
create_gic(vms, sysmem);
virt_cpu_post_init(vms, sysmem);
@ -2742,6 +2756,12 @@ static void virt_instance_init(Object *obj)
} else {
/* Default allows ITS instantiation */
vms->its = true;
if (vmc->no_tcg_its) {
vms->tcg_its = false;
} else {
vms->tcg_its = true;
}
}
/* Default disallows iommu instantiation */
@ -2791,8 +2811,13 @@ DEFINE_VIRT_MACHINE_AS_LATEST(6, 2)
static void virt_machine_6_1_options(MachineClass *mc)
{
VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
virt_machine_6_2_options(mc);
compat_props_add(mc->compat_props, hw_compat_6_1, hw_compat_6_1_len);
/* qemu ITS was introduced with 6.2 */
vmc->no_tcg_its = true;
}
DEFINE_VIRT_MACHINE(6, 1)

2
include/hw/arm/virt.h
View File

@ -120,6 +120,7 @@ struct VirtMachineClass {
MachineClass parent;
bool disallow_affinity_adjustment;
bool no_its;
bool no_tcg_its;
bool no_pmu;
bool claim_edge_triggered_timers;
bool smbios_old_sys_ver;
@ -141,6 +142,7 @@ struct VirtMachineState {
bool highmem;
bool highmem_ecam;
bool its;
bool tcg_its;
bool virt;
bool ras;
bool mte;

4
target/arm/kvm_arm.h
View File

@ -525,8 +525,8 @@ static inline const char *its_class_name(void)
/* KVM implementation requires this capability */
return kvm_direct_msi_enabled() ? "arm-its-kvm" : NULL;
} else {
/* Software emulation is not implemented yet */
return NULL;
/* Software emulation based model */
return "arm-gicv3-its";
}
}