@@ -565,6 +565,11 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
apic->flags = cpu_to_le32(1);
break;
}
+ case ACPI_APIC_GENERIC_CPU_INTERFACE: {
+ AcpiMadtGenericCpuInterface *gicc = (void *)madt_buf->data;
+ gicc->flags = cpu_to_le32(1);
+ break;
+ }
default:
assert(0);
}
@@ -593,6 +593,22 @@ build_gtdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
}
/* MADT */
+static void
+build_mat_entry(AcpiDeviceIf *adev, int uid, const CPUArchIdList *arch_ids,
+ GArray *entry)
+{
+ AcpiMadtGenericCpuInterface *gicc = acpi_data_push(entry,sizeof(*gicc));
+ MachineState *ms = MACHINE(qdev_get_machine());
+ CPUArchIdList *possible_cpus = ms->possible_cpus;
+
+ /* fill the relevant fields of _MAT entry for GICC */
+ gicc->type = ACPI_APIC_GENERIC_CPU_INTERFACE;
+ gicc->length = sizeof(*gicc);
+ gicc->cpu_interface_number = cpu_to_le32(uid);
+ gicc->arm_mpidr = possible_cpus->cpus[uid].arch_id;
+ gicc->uid = cpu_to_le32(uid);
+}
+
static void
build_madt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
{
@@ -741,6 +757,10 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
.acpi_1_compatible = false,
.has_legacy_cphp = false
};
+ AcpiDeviceIfClass *adevc;
+ /* _MAT entry shall be used within cpus aml */
+ adevc = ACPI_DEVICE_IF_CLASS(DEVICE_GET_CLASS(vms->acpi_dev));
+ adevc->madt_cpu = build_mat_entry;
build_cpus_aml(scope, ms, opts, memmap[VIRT_CPUHP_ACPI].base,
"\\_SB", NULL, AML_SYSTEM_MEMORY);
@@ -37,6 +37,7 @@
#include "hw/block/flash.h"
#include "sysemu/kvm.h"
#include "hw/intc/arm_gicv3_common.h"
+#include "hw/acpi/acpi_dev_interface.h"
#define NUM_GICV2M_SPIS 64
#define NUM_VIRTIO_TRANSPORTS 32
Adds a function which builds the ACPI _MAT entry for processor objects. This shall be called from the cpus AML for all possible vcpus. The entry is passed to the guest kernel with ACPI_MADT_GICC_ENABLED flag when it evaluates _MAT object. OSPM evaluates _MAT object in context to the cpu hotplug event. Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com> Signed-off-by: Salil Mehta <salil.mehta@huawei.com> --- hw/acpi/cpu.c | 5 +++++ hw/arm/virt-acpi-build.c | 20 ++++++++++++++++++++ include/hw/arm/virt.h | 1 + 3 files changed, 26 insertions(+)