[RFC PATCH 04/13] hw/acpi: Don't include mirror vcpus in ACPI tables

[Ashish Kalra <Ashish.Kalra@amd.com>]

From: Tobin Feldman-Fitzthum <tobin@linux.ibm.com>

By excluding mirror vcpus from the ACPI tables, we hide them from the
guest OS.

Signed-off-by: Tobin Feldman-Fitzthum <tobin@linux.ibm.com>
Signed-off-by: Dov Murik <dovmurik@linux.vnet.ibm.com>
Co-developed-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
---
 hw/acpi/cpu.c         | 10 ++++++++++
 hw/i386/acpi-build.c  |  5 +++++
 hw/i386/acpi-common.c |  5 +++++
 3 files changed, 20 insertions(+)

diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c
index f82e9512fd..8ac2fd018e 100644
--- a/hw/acpi/cpu.c
+++ b/hw/acpi/cpu.c
@@ -435,6 +435,11 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
 
         method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
         for (i = 0; i < arch_ids->len; i++) {
+            if (arch_ids->cpus[i].mirror_vcpu) {
+                /* don't build objects for mirror vCPUs */
+                continue;
+            }
+
             Aml *cpu = aml_name(CPU_NAME_FMT, i);
             Aml *uid = aml_arg(0);
             Aml *event = aml_arg(1);
@@ -650,6 +655,11 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
 
         /* build Processor object for each processor */
         for (i = 0; i < arch_ids->len; i++) {
+            if (arch_ids->cpus[i].mirror_vcpu) {
+                /* don't build objects for mirror vCPUs */
+                continue;
+            }
+
             Aml *dev;
             Aml *uid = aml_int(i);
             GArray *madt_buf = g_array_new(0, 1, 1);
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index a33ac8b91e..3c0a8b47ef 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1928,6 +1928,11 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
     srat->reserved1 = cpu_to_le32(1);
 
     for (i = 0; i < apic_ids->len; i++) {
+        if (apic_ids->cpus[i].mirror_vcpu) {
+            /* don't build objects for mirror vCPUs */
+            continue;
+        }
+
         int node_id = apic_ids->cpus[i].props.node_id;
         uint32_t apic_id = apic_ids->cpus[i].arch_id;
 
diff --git a/hw/i386/acpi-common.c b/hw/i386/acpi-common.c
index 1f5947fcf9..80aefbc920 100644
--- a/hw/i386/acpi-common.c
+++ b/hw/i386/acpi-common.c
@@ -91,6 +91,11 @@ void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
     madt->flags = cpu_to_le32(1);
 
     for (i = 0; i < apic_ids->len; i++) {
+        if (apic_ids->cpus[i].mirror_vcpu) {
+            /* don't build objects for mirror vCPUs */
+            continue;
+        }
+
         adevc->madt_cpu(adev, i, apic_ids, table_data);
         if (apic_ids->cpus[i].arch_id > 254) {
             x2apic_mode = true;
-- 
2.17.1