[v2,4/4] hw/arm/virt: Declare fwcfg as dma cache coherent in dt
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Message ID 1486644810-33181-5-git-send-email-agraf@suse.de
State New
Headers show

Commit Message

Alexander Graf Feb. 9, 2017, 12:53 p.m. UTC
Fw-cfg recently learned how to directly access guest memory and does so in
cache coherent fashion. Tell the guest about that fact when it's using DT.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 hw/arm/virt.c | 1 +
 1 file changed, 1 insertion(+)

Patch
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diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 14881fa..da9622f 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -929,6 +929,7 @@  static FWCfgState *create_fw_cfg(const VirtMachineState *vms, AddressSpace *as)
                             "compatible", "qemu,fw-cfg-mmio");
     qemu_fdt_setprop_sized_cells(vms->fdt, nodename, "reg",
                                  2, base, 2, size);
+    qemu_fdt_setprop(vms->fdt, nodename, "dma-coherent", NULL, 0);
     g_free(nodename);
     return fw_cfg;
 }