[Qemu-devel] [PULL 02/14] fw_cfg: factor out initialization of FW_CFG_ID (rev. number)

[Paolo Bonzini <pbonzini@redhat.com>]

From: "Gabriel L. Somlo" <somlo@cmu.edu>

The fw_cfg documentation says this of the revision key (0x0001, FW_CFG_ID):

> A 32-bit little-endian unsigned int, this item is used as an interface
> revision number, and is currently set to 1 by all QEMU architectures
> which expose a fw_cfg device.

arm/virt doesn't.  It could be argued that that's an error in
"hw/arm/virt.c"; on the other hand, all of the other fw_cfg providing
boards set the interface version to 1 manually, despite the device
coming from the same, shared implementation. Therefore, instead of
adding

    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);

to arm/virt, consolidate all such existing calls in the fw_cfg
initialization code.

Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Message-Id: <1426789244-26318-1-git-send-email-somlo@cmu.edu>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/i386/pc.c          | 1 -
 hw/nvram/fw_cfg.c     | 1 +
 hw/ppc/mac_newworld.c | 1 -
 hw/ppc/mac_oldworld.c | 1 -
 hw/sparc/sun4m.c      | 1 -
 hw/sparc64/sun4u.c    | 1 -
 6 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index a52d2af..a8e6be1 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -702,7 +702,6 @@ static FWCfgState *bochs_bios_init(void)
      *     the APIC ID, not the "CPU index"
      */
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)apic_id_limit);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
     fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES,
                      acpi_tables, acpi_tables_len);
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 4caf536..68eff77 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -614,6 +614,7 @@ static void fw_cfg_init1(DeviceState *dev)
     qdev_init_nofail(dev);
 
     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4);
+    fw_cfg_add_i32(s, FW_CFG_ID, 1);
     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 624b4ab..e0397bc 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -460,7 +460,6 @@ static void ppc_core99_init(MachineState *machine)
 
     fw_cfg = fw_cfg_init_mem(CFG_ADDR, CFG_ADDR + 2);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, machine_arch);
     fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, kernel_base);
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 3079510..f26133d 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -315,7 +315,6 @@ static void ppc_heathrow_init(MachineState *machine)
 
     fw_cfg = fw_cfg_init_mem(CFG_ADDR, CFG_ADDR + 2);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, ARCH_HEATHROW);
     fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, kernel_base);
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index b879aa9..255ba1f 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -1088,7 +1088,6 @@ static void sun4m_hw_init(const struct sun4m_hwdef *hwdef,
 
     fw_cfg = fw_cfg_init_mem(CFG_ADDR, CFG_ADDR + 2);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, hwdef->machine_id);
     fw_cfg_add_i16(fw_cfg, FW_CFG_SUN4M_DEPTH, graphic_depth);
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index f027caf..6f34e87 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -895,7 +895,6 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
 
     fw_cfg = fw_cfg_init_io(BIOS_CFG_IOPORT);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, hwdef->machine_id);
     fw_cfg_add_i64(fw_cfg, FW_CFG_KERNEL_ADDR, kernel_entry);
-- 
2.3.3