diff mbox

[PULL,v2,6/7] Enable fw_cfg DMA interface for x86

Message ID 1445321492-2902-7-git-send-email-kraxel@redhat.com
State New
Headers show

Commit Message

Gerd Hoffmann Oct. 20, 2015, 6:11 a.m. UTC 
From: Marc Marí <markmb@redhat.com>

Enable the fw_cfg DMA interface for all the x86 platforms.

Based on Gerd Hoffman's initial implementation.

Signed-off-by: Marc Marí <markmb@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/i386/pc.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
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Patch

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 682867a..b25a872 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -752,14 +752,15 @@  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
@@ -1393,7 +1394,8 @@  FWCfgState *pc_memory_init(PCMachineState *pcms,
                                         option_rom_mr,
                                         1);
 
-    fw_cfg = bochs_bios_init();
+    fw_cfg = bochs_bios_init(&address_space_memory);
+
     rom_set_fw(fw_cfg);
 
     if (guest_info->has_reserved_memory && pcms->hotplug_memory.base) {