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hw/arm/virt: Declare fwcfg as dma cache coherent in dt 

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>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org>
Message-id: 1486644810-33181-5-git-send-email-agraf@suse.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alexander Graf 2017-02-10 17:40:29 +00:00 committed by Peter Maydell
parent 3b5c492b1c
commit 14efdb5cb3
1 changed files with 1 additions and 0 deletions
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hw/arm/virt.c
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@ -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;
}