[RFC PATCH-for-9.1 08/29] hw/i386/pc: Move CXLState to PcPciMachineState

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

CXL depends on PCIe, which isn't available on non-PCI
machines such the ISA-only PC one.
Move CXLState to PcPciMachineState, and move the CXL
specific calls to pc_pci_machine_initfn() and
pc_pci_machine_done().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/i386/pc.h |  3 ++-
 hw/i386/acpi-build.c | 14 +++++++++++---
 hw/i386/pc.c         | 39 ++++++++++++++++++++-------------------
 3 files changed, 33 insertions(+), 23 deletions(-)

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 24c8e17e62..a97493d29d 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -54,13 +54,14 @@ typedef struct PCMachineState {
     hwaddr memhp_io_base;
 
     SGXEPCState sgx_epc;
-    CXLState cxl_devices_state;
 } PCMachineState;
 
 typedef struct PcPciMachineState {
     PCMachineState parent_obj;
 
     Notifier machine_done;
+
+    CXLState cxl_devices_state;
 } PcPciMachineState;
 
 #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index b9890886f6..6e8e32e5d2 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1554,6 +1554,11 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
     crs_range_set_init(&crs_range_set);
     bus = PC_MACHINE(machine)->pcibus;
     if (bus) {
+        PcPciMachineState *ppms;
+
+        assert(pc_machine_is_pci_enabled(pcms));
+        ppms = PC_PCI_MACHINE(machine);
+
         QLIST_FOREACH(bus, &bus->child, sibling) {
             uint8_t bus_num = pci_bus_num(bus);
             uint8_t numa_node = pci_bus_numa_node(bus);
@@ -1607,7 +1612,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
 
             /* Handle the ranges for the PXB expanders */
             if (pci_bus_is_cxl(bus)) {
-                MemoryRegion *mr = &pcms->cxl_devices_state.host_mr;
+                MemoryRegion *mr = &ppms->cxl_devices_state.host_mr;
                 uint64_t base = mr->addr;
 
                 cxl_present = true;
@@ -2513,6 +2518,8 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
     Object *vmgenid_dev;
     char *oem_id;
     char *oem_table_id;
+    bool pci_enabled = pc_machine_is_pci_enabled(pcms);
+    PcPciMachineState *ppms = pci_enabled ? PC_PCI_MACHINE(pcms) : NULL;
 
     acpi_get_pm_info(machine, &pm);
     acpi_get_misc_info(&misc);
@@ -2640,9 +2647,10 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
                           machine->nvdimms_state, machine->ram_slots,
                           x86ms->oem_id, x86ms->oem_table_id);
     }
-    if (pcms->cxl_devices_state.is_enabled) {
+    if (ppms && ppms->cxl_devices_state.is_enabled) {
         cxl_build_cedt(table_offsets, tables_blob, tables->linker,
-                       x86ms->oem_id, x86ms->oem_table_id, &pcms->cxl_devices_state);
+                       x86ms->oem_id, x86ms->oem_table_id,
+                       &ppms->cxl_devices_state);
     }
 
     acpi_add_table(table_offsets, tables_blob);
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index f9226f7115..6d87d1d4c2 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -598,13 +598,6 @@ void pc_machine_done(Notifier *notifier, void *data)
                                         PCMachineState, machine_done);
     X86MachineState *x86ms = X86_MACHINE(pcms);
 
-    cxl_hook_up_pxb_registers(pcms->pcibus, &pcms->cxl_devices_state,
-                              &error_fatal);
-
-    if (pcms->cxl_devices_state.is_enabled) {
-        cxl_fmws_link_targets(&pcms->cxl_devices_state, &error_fatal);
-    }
-
     /* set the number of CPUs */
     x86_rtc_set_cpus_count(x86ms->rtc, x86ms->boot_cpus);
 
@@ -626,6 +619,13 @@ static void pc_pci_machine_done(Notifier *notifier, void *data)
     PCMachineState *pcms = PC_MACHINE(ppms);
     X86MachineState *x86ms = X86_MACHINE(pcms);
 
+    cxl_hook_up_pxb_registers(pcms->pcibus, &ppms->cxl_devices_state,
+                              &error_fatal);
+
+    if (ppms->cxl_devices_state.is_enabled) {
+        cxl_fmws_link_targets(&ppms->cxl_devices_state, &error_fatal);
+    }
+
     fw_cfg_add_extra_pci_roots(pcms->pcibus, x86ms->fw_cfg);
 }
 
@@ -719,13 +719,14 @@ static uint64_t pc_get_cxl_range_start(PCMachineState *pcms)
 
 static uint64_t pc_get_cxl_range_end(PCMachineState *pcms)
 {
+    PcPciMachineState *ppms = PC_PCI_MACHINE(pcms);
     uint64_t start = pc_get_cxl_range_start(pcms) + MiB;
 
-    if (pcms->cxl_devices_state.fixed_windows) {
+    if (ppms->cxl_devices_state.fixed_windows) {
         GList *it;
 
         start = ROUND_UP(start, 256 * MiB);
-        for (it = pcms->cxl_devices_state.fixed_windows; it; it = it->next) {
+        for (it = ppms->cxl_devices_state.fixed_windows; it; it = it->next) {
             CXLFixedWindow *fw = it->data;
             start += fw->size;
         }
@@ -823,6 +824,7 @@ void pc_memory_init(PCMachineState *pcms,
     hwaddr cxl_base, cxl_resv_end = 0;
     X86CPU *cpu = X86_CPU(first_cpu);
     bool pci_enabled = pc_machine_is_pci_enabled(pcms);
+    PcPciMachineState *ppms = pci_enabled ? PC_PCI_MACHINE(pcms) : NULL;
 
     assert(machine->ram_size == x86ms->below_4g_mem_size +
                                 x86ms->above_4g_mem_size);
@@ -926,20 +928,20 @@ void pc_memory_init(PCMachineState *pcms,
         machine_memory_devices_init(machine, device_mem_base, device_mem_size);
     }
 
-    if (pcms->cxl_devices_state.is_enabled) {
-        MemoryRegion *mr = &pcms->cxl_devices_state.host_mr;
+    if (ppms && ppms->cxl_devices_state.is_enabled) {
+        MemoryRegion *mr = &ppms->cxl_devices_state.host_mr;
         hwaddr cxl_size = MiB;
 
         cxl_base = pc_get_cxl_range_start(pcms);
         memory_region_init(mr, OBJECT(machine), "cxl_host_reg", cxl_size);
         memory_region_add_subregion(system_memory, cxl_base, mr);
         cxl_resv_end = cxl_base + cxl_size;
-        if (pcms->cxl_devices_state.fixed_windows) {
+        if (ppms->cxl_devices_state.fixed_windows) {
             hwaddr cxl_fmw_base;
             GList *it;
 
             cxl_fmw_base = ROUND_UP(cxl_base + cxl_size, 256 * MiB);
-            for (it = pcms->cxl_devices_state.fixed_windows; it; it = it->next) {
+            for (it = ppms->cxl_devices_state.fixed_windows; it; it = it->next) {
                 CXLFixedWindow *fw = it->data;
 
                 fw->base = cxl_fmw_base;
@@ -979,7 +981,7 @@ void pc_memory_init(PCMachineState *pcms,
             res_mem_end += memory_region_size(&machine->device_memory->mr);
         }
 
-        if (pcms->cxl_devices_state.is_enabled) {
+        if (ppms->cxl_devices_state.is_enabled) {
             res_mem_end = cxl_resv_end;
         }
         *val = cpu_to_le64(ROUND_UP(res_mem_end, 1 * GiB));
@@ -1010,11 +1012,12 @@ uint64_t pc_pci_hole64_start(void)
 {
     PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
+    PcPciMachineState *ppms = PC_PCI_MACHINE(pcms);
     MachineState *ms = MACHINE(pcms);
     uint64_t hole64_start = 0;
     ram_addr_t size = 0;
 
-    if (pcms->cxl_devices_state.is_enabled) {
+    if (ppms->cxl_devices_state.is_enabled) {
         hole64_start = pc_get_cxl_range_end(pcms);
     } else if (pcmc->has_reserved_memory && (ms->ram_size < ms->maxram_size)) {
         pc_get_device_memory_range(pcms, &hole64_start, &size);
@@ -1651,7 +1654,6 @@ static void pc_machine_initfn(Object *obj)
 {
     PCMachineState *pcms = PC_MACHINE(obj);
     PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
-    bool pci_enabled = pc_machine_is_pci_enabled(pcms);
 
 #ifdef CONFIG_VMPORT
     pcms->vmport = ON_OFF_AUTO_AUTO;
@@ -1678,9 +1680,6 @@ static void pc_machine_initfn(Object *obj)
     pcms->pcspk = isa_new(TYPE_PC_SPEAKER);
     object_property_add_alias(OBJECT(pcms), "pcspk-audiodev",
                               OBJECT(pcms->pcspk), "audiodev");
-    if (pci_enabled) {
-        cxl_machine_init(obj, &pcms->cxl_devices_state);
-    }
 
     pcms->machine_done.notify = pc_machine_done;
     qemu_add_machine_init_done_notifier(&pcms->machine_done);
@@ -1690,6 +1689,8 @@ static void pc_pci_machine_initfn(Object *obj)
 {
     PcPciMachineState *ppms = PC_PCI_MACHINE(obj);
 
+    cxl_machine_init(obj, &ppms->cxl_devices_state);
+
     ppms->machine_done.notify = pc_pci_machine_done;
     qemu_add_machine_init_done_notifier(&ppms->machine_done);
 }
-- 
2.41.0