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hw/arm/virt: Use "msi-map" devicetree property for PCI 

The "msi-parent" property can be used on the PCI node when MSIs do not
contain sideband data (device IDs) [1]. In QEMU, MSI transactions
contain the requester ID, so the PCI node should use the "msi-map"
property instead of "msi-parent". In our case the property describes an
identity map between requester ID and sideband data.

This fixes a warning when passing the DTB generated by QEMU to dtc,
following a recent change to the GICv3 node:

  Warning (msi_parent_property): /pcie@10000000:msi-parent: property size (4) too small for cell size 1

[1] linux/Documentation/devicetree/bindings/pci/pci-msi.txt

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20220927100347.176606-4-jean-philippe@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jean-Philippe Brucker 2022-09-27 11:03:44 +01:00 committed by Peter Maydell
parent a312a53007
commit 6b2f3ac945
1 changed files with 2 additions and 2 deletions
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4
hw/arm/virt.c
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@ -1490,8 +1490,8 @@ static void create_pcie(VirtMachineState *vms)
qemu_fdt_setprop(ms->fdt, nodename, "dma-coherent", NULL, 0);
if (vms->msi_phandle) {
qemu_fdt_setprop_cells(ms->fdt, nodename, "msi-parent",
vms->msi_phandle);
qemu_fdt_setprop_cells(ms->fdt, nodename, "msi-map",
0, vms->msi_phandle, 0, 0x10000);
}
qemu_fdt_setprop_sized_cells(ms->fdt, nodename, "reg",