[Qemu-devel] [PATCH v3 4/5] Enable fw_cfg DMA interface for ARM

["Marc Marí" <markmb@redhat.com>]

Enable the fw_cfg DMA interface for the ARM virt machine.

Based on Gerd Hoffman's initial implementation.

Signed-off-by: Marc Marí <markmb@redhat.com>
---
 hw/arm/virt.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 3568107..47f4ad3 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -113,7 +113,7 @@ static const MemMapEntry a15memmap[] = {
     [VIRT_GIC_V2M] =            { 0x08020000, 0x00001000 },
     [VIRT_UART] =               { 0x09000000, 0x00001000 },
     [VIRT_RTC] =                { 0x09010000, 0x00001000 },
-    [VIRT_FW_CFG] =             { 0x09020000, 0x0000000a },
+    [VIRT_FW_CFG] =             { 0x09020000, 0x00000014 },
     [VIRT_MMIO] =               { 0x0a000000, 0x00000200 },
     /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
     [VIRT_PLATFORM_BUS] =       { 0x0c000000, 0x02000000 },
@@ -651,13 +651,13 @@ static void create_flash(const VirtBoardInfo *vbi)
     g_free(nodename);
 }
 
-static void create_fw_cfg(const VirtBoardInfo *vbi)
+static void create_fw_cfg(const VirtBoardInfo *vbi, AddressSpace *as)
 {
     hwaddr base = vbi->memmap[VIRT_FW_CFG].base;
     hwaddr size = vbi->memmap[VIRT_FW_CFG].size;
     char *nodename;
 
-    fw_cfg_init_mem_wide(base + 8, base, 8, 0, NULL);
+    fw_cfg_init_mem_wide(base + 8, base, 8, base + 16, as);
 
     nodename = g_strdup_printf("/fw-cfg@%" PRIx64, base);
     qemu_fdt_add_subnode(vbi->fdt, nodename);
@@ -919,6 +919,7 @@ static void machvirt_init(MachineState *machine)
 
     create_fdt(vbi);
 
+
     for (n = 0; n < smp_cpus; n++) {
         ObjectClass *oc = cpu_class_by_name(TYPE_ARM_CPU, cpustr[0]);
         CPUClass *cc = CPU_CLASS(oc);
@@ -984,7 +985,7 @@ static void machvirt_init(MachineState *machine)
      */
     create_virtio_devices(vbi, pic);
 
-    create_fw_cfg(vbi);
+    create_fw_cfg(vbi, &address_space_memory);
     rom_set_fw(fw_cfg_find());
 
     guest_info->smp_cpus = smp_cpus;
-- 
2.4.3