target/i386: move linuxboot_dma_enabled to X86MachineState

This removes a parameter from x86_load_linux, and will avoid code
duplication between the linux and multiboot cases once multiboot
starts to support DMA.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/i386/microvm.c

@@ -331,7 +331,7 @@ static void microvm_memory_init(MicrovmMachineState *mms)
     rom_set_fw(fw_cfg);
 
     if (machine->kernel_filename != NULL) {
-        x86_load_linux(x86ms, fw_cfg, 0, true, true);
+        x86_load_linux(x86ms, fw_cfg, 0, true);
     }
 
     if (mms->option_roms) {
@@ -667,6 +667,7 @@ static void microvm_machine_initfn(Object *obj)
 
 static void microvm_class_init(ObjectClass *oc, void *data)
 {
+    X86MachineClass *x86mc = X86_MACHINE_CLASS(oc);
     MachineClass *mc = MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 
@@ -697,6 +698,8 @@ static void microvm_class_init(ObjectClass *oc, void *data)
     hc->unplug_request = microvm_device_unplug_request_cb;
     hc->unplug = microvm_device_unplug_cb;
 
+    x86mc->fwcfg_dma_enabled = true;
+
     object_class_property_add(oc, MICROVM_MACHINE_PIC, "OnOffAuto",
                               microvm_machine_get_pic,
                               microvm_machine_set_pic,

hw/i386/pc.c

@@ -775,7 +775,7 @@ void xen_load_linux(PCMachineState *pcms)
     rom_set_fw(fw_cfg);
 
     x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
-                   pcmc->pvh_enabled, pcmc->linuxboot_dma_enabled);
+                   pcmc->pvh_enabled);
     for (i = 0; i < nb_option_roms; i++) {
         assert(!strcmp(option_rom[i].name, "linuxboot.bin") ||
                !strcmp(option_rom[i].name, "linuxboot_dma.bin") ||
@@ -927,7 +927,7 @@ void pc_memory_init(PCMachineState *pcms,
 
     if (linux_boot) {
         x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
-                       pcmc->pvh_enabled, pcmc->linuxboot_dma_enabled);
+                       pcmc->pvh_enabled);
     }
 
     for (i = 0; i < nb_option_roms; i++) {
@@ -1664,7 +1664,6 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     /* BIOS ACPI tables: 128K. Other BIOS datastructures: less than 4K reported
      * to be used at the moment, 32K should be enough for a while.  */
     pcmc->acpi_data_size = 0x20000 + 0x8000;
-    pcmc->linuxboot_dma_enabled = true;
     pcmc->pvh_enabled = true;
     pcmc->kvmclock_create_always = true;
     assert(!mc->get_hotplug_handler);

hw/i386/pc_piix.c

@@ -620,11 +620,12 @@ DEFINE_I440FX_MACHINE(v2_7, "pc-i440fx-2.7", NULL,
 
 static void pc_i440fx_2_6_machine_options(MachineClass *m)
 {
+    X86MachineClass *x86mc = X86_MACHINE_CLASS(m);
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
 
     pc_i440fx_2_7_machine_options(m);
     pcmc->legacy_cpu_hotplug = true;
-    pcmc->linuxboot_dma_enabled = false;
+    x86mc->fwcfg_dma_enabled = false;
     compat_props_add(m->compat_props, hw_compat_2_6, hw_compat_2_6_len);
     compat_props_add(m->compat_props, pc_compat_2_6, pc_compat_2_6_len);
 }

hw/i386/pc_q35.c

@@ -573,11 +573,12 @@ DEFINE_Q35_MACHINE(v2_7, "pc-q35-2.7", NULL,
 
 static void pc_q35_2_6_machine_options(MachineClass *m)
 {
+    X86MachineClass *x86mc = X86_MACHINE_CLASS(m);
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
 
     pc_q35_2_7_machine_options(m);
     pcmc->legacy_cpu_hotplug = true;
-    pcmc->linuxboot_dma_enabled = false;
+    x86mc->fwcfg_dma_enabled = false;
     compat_props_add(m->compat_props, hw_compat_2_6, hw_compat_2_6_len);
     compat_props_add(m->compat_props, pc_compat_2_6, pc_compat_2_6_len);
 }

hw/i386/x86.c

@@ -764,9 +764,9 @@ static bool load_elfboot(const char *kernel_filename,
 void x86_load_linux(X86MachineState *x86ms,
                     FWCfgState *fw_cfg,
                     int acpi_data_size,
-                    bool pvh_enabled,
+                    bool pvh_enabled)
-                    bool linuxboot_dma_enabled)
 {
+    bool linuxboot_dma_enabled = X86_MACHINE_GET_CLASS(x86ms)->fwcfg_dma_enabled;
     uint16_t protocol;
     int setup_size, kernel_size, cmdline_size;
     int dtb_size, setup_data_offset;
@@ -1332,6 +1332,7 @@ static void x86_machine_class_init(ObjectClass *oc, void *data)
     mc->possible_cpu_arch_ids = x86_possible_cpu_arch_ids;
     x86mc->compat_apic_id_mode = false;
     x86mc->save_tsc_khz = true;
+    x86mc->fwcfg_dma_enabled = true;
     nc->nmi_monitor_handler = x86_nmi;
 
     object_class_property_add(oc, X86_MACHINE_SMM, "OnOffAuto",

include/hw/i386/pc.h

@@ -116,9 +116,6 @@ struct PCMachineClass {
     /* generate legacy CPU hotplug AML */
     bool legacy_cpu_hotplug;
 
-    /* use DMA capable linuxboot option rom */
-    bool linuxboot_dma_enabled;
-
     /* use PVH to load kernels that support this feature */
     bool pvh_enabled;
 

include/hw/i386/x86.h

@@ -38,6 +38,8 @@ struct X86MachineClass {
     bool save_tsc_khz;
     /* Enables contiguous-apic-ID mode */
     bool compat_apic_id_mode;
+    /* use DMA capable linuxboot option rom */
+    bool fwcfg_dma_enabled;
 };
 
 struct X86MachineState {
@@ -120,8 +122,7 @@ void x86_bios_rom_init(MachineState *ms, const char *default_firmware,
 void x86_load_linux(X86MachineState *x86ms,
                     FWCfgState *fw_cfg,
                     int acpi_data_size,
-                    bool pvh_enabled,
+                    bool pvh_enabled);
-                    bool linuxboot_dma_enabled);
 
 bool x86_machine_is_smm_enabled(const X86MachineState *x86ms);
 bool x86_machine_is_acpi_enabled(const X86MachineState *x86ms);