Enable the fw_cfg DMA interface for all the x86 platforms.
Based on Gerd Hoffman's initial implementation.
Signed-off-by: Marc Marí <mar...@redhat.com>
---
hw/i386/pc.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 56aecce..6e02061 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -753,14 +753,15 @@ static void pc_build_smbios(FWCfgState *fw_cfg)
}
}
-static FWCfgState *bochs_bios_init(void)
+static FWCfgState *bochs_bios_init(AddressSpace *as)
{
FWCfgState *fw_cfg;
uint64_t *numa_fw_cfg;
int i, j;
unsigned int apic_id_limit = pc_apic_id_limit(max_cpus);
- fw_cfg = fw_cfg_init_io(BIOS_CFG_IOPORT);
+ fw_cfg = fw_cfg_init_io_dma(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 4, as);
+
/* FW_CFG_MAX_CPUS is a bit confusing/problematic on x86:
*
* SeaBIOS needs FW_CFG_MAX_CPUS for CPU hotplug, but the CPU hotplug
@@ -1316,6 +1317,7 @@ FWCfgState *pc_memory_init(PCMachineState *pcms,
MemoryRegion *ram_below_4g, *ram_above_4g;
FWCfgState *fw_cfg;
MachineState *machine = MACHINE(pcms);
+ AddressSpace *as;
assert(machine->ram_size == pcms->below_4g_mem_size +
pcms->above_4g_mem_size);
@@ -1407,7 +1409,10 @@ FWCfgState *pc_memory_init(PCMachineState *pcms,
option_rom_mr,
1);
- fw_cfg = bochs_bios_init();
+ as = g_malloc(sizeof(*as));
+ address_space_init(as, ram_below_4g, "pc.as");
+ fw_cfg = bochs_bios_init(as);
+
rom_set_fw(fw_cfg);
if (guest_info->has_reserved_memory && pcms->hotplug_memory.base) {
--
2.4.3
