qemu/arm-virt-acpi-Factor-out-CPPC-building-from-DSDT-CPU.patch

From 2fdece10dac6161cb6c1f0f05247391aa3269eed Mon Sep 17 00:00:00 2001
From: Keqian Zhu <zhukeqian1@huawei.com>
Date: Wed, 22 Apr 2020 15:58:27 +0800
Subject: [PATCH] arm/virt/acpi: Factor out CPPC building from DSDT CPU aml

When CPU hotplug is enabled, we will use build_cpus_aml instead of
acpi_dsdt_add_cpus, so factor out CPPC building and we can reuse it
in build_cpus_aml.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
---
 hw/acpi/generic_event_device.c       |  1 +
 hw/arm/virt-acpi-build.c             | 33 +++++++++++++++++-----------
 include/hw/acpi/acpi_dev_interface.h |  2 ++
 include/hw/arm/virt.h                |  2 ++
 4 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index b834ae3ff6..82139b4314 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -289,6 +289,7 @@ static void acpi_ged_class_init(ObjectClass *class, void *data)

     adevc->send_event = acpi_ged_send_event;
     adevc->madt_cpu = virt_madt_cpu_entry;
+    adevc->cpu_cppc = virt_acpi_dsdt_cpu_cppc;
 }

 static const TypeInfo acpi_ged_info = {
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 4b6aace433..8b68a15d76 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -111,8 +111,24 @@ static void acpi_dsdt_add_cppc(Aml *dev, uint64_t cpu_base, int *regs_offset)
     aml_append(dev, aml_name_decl("_CPC", cpc));
 }

-static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus,
-                               const MemMapEntry *cppc_memmap)
+void virt_acpi_dsdt_cpu_cppc(AcpiDeviceIf *adev, int ncpu, int num_cpu, Aml *dev)
+{
+    VirtMachineState *vms = VIRT_MACHINE(qdev_get_machine());
+    const MemMapEntry *cppc_memmap = &vms->memmap[VIRT_CPUFREQ];
+
+    /*
+    * Append _CPC and _PSD to support CPU frequence show
+    * Check CPPC available by DESIRED_PERF register
+    */
+    if (cppc_regs_offset[DESIRED_PERF] != -1) {
+        acpi_dsdt_add_cppc(dev,
+                           cppc_memmap->base + ncpu * CPPC_REG_PER_CPU_STRIDE,
+                           cppc_regs_offset);
+        acpi_dsdt_add_psd(dev, num_cpu);
+    }
+}
+
+static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus, VirtMachineState *vms)
 {
     uint16_t i;

@@ -121,16 +137,7 @@ static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus,
         aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
         aml_append(dev, aml_name_decl("_UID", aml_int(i)));

-        /*
-         * Append _CPC and _PSD to support CPU frequence show
-         * Check CPPC available by DESIRED_PERF register
-         */
-        if (cppc_regs_offset[DESIRED_PERF] != -1) {
-            acpi_dsdt_add_cppc(dev,
-                               cppc_memmap->base + i * CPPC_REG_PER_CPU_STRIDE,
-                               cppc_regs_offset);
-            acpi_dsdt_add_psd(dev, smp_cpus);
-        }
+        virt_acpi_dsdt_cpu_cppc(NULL, i, smp_cpus, dev);

         aml_append(scope, dev);
     }
@@ -810,7 +817,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
      * the RTC ACPI device at all when using UEFI.
      */
     scope = aml_scope("\\_SB");
-    acpi_dsdt_add_cpus(scope, vms->smp_cpus, &memmap[VIRT_CPUFREQ]);
+    acpi_dsdt_add_cpus(scope, vms->smp_cpus, vms);
     acpi_dsdt_add_uart(scope, &memmap[VIRT_UART],
                        (irqmap[VIRT_UART] + ARM_SPI_BASE));
     acpi_dsdt_add_flash(scope, &memmap[VIRT_FLASH]);
diff --git a/include/hw/acpi/acpi_dev_interface.h b/include/hw/acpi/acpi_dev_interface.h
index adcb3a816c..2952914569 100644
--- a/include/hw/acpi/acpi_dev_interface.h
+++ b/include/hw/acpi/acpi_dev_interface.h
@@ -3,6 +3,7 @@

 #include "qom/object.h"
 #include "hw/boards.h"
+#include "hw/acpi/aml-build.h"

 /* These values are part of guest ABI, and can not be changed */
 typedef enum {
@@ -55,5 +56,6 @@ typedef struct AcpiDeviceIfClass {
     void (*send_event)(AcpiDeviceIf *adev, AcpiEventStatusBits ev);
     void (*madt_cpu)(AcpiDeviceIf *adev, int uid,
                      const CPUArchIdList *apic_ids, GArray *entry);
+    void (*cpu_cppc)(AcpiDeviceIf *adev, int uid, int num_cpu, Aml *dev);
 } AcpiDeviceIfClass;
 #endif
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 6b1f10b231..cbdea7ff32 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -157,6 +157,8 @@ typedef struct {
 void virt_acpi_setup(VirtMachineState *vms);
 void virt_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
                          const CPUArchIdList *cpu_list, GArray *entry);
+void virt_acpi_dsdt_cpu_cppc(AcpiDeviceIf *adev, int uid,
+                             int num_cpu, Aml *dev);

 /* Return the number of used redistributor regions  */
 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms)
--
2.19.1