qemu /
SLOF /
497f61400d3b10cde3f2bd98201bf99441ec0eae fdt: Fix updating the tree at H_CAS
The previous approach to merge the QEMU FDT into the existing tree and
then patch it turned to be broken as we patch properties based on their
names only so we patch not just what QEMU provides (which was
the intention) but also all properties SLOF created. This breaks one of
them - "interrupt-map" - it is created by QEMU for a PHB but SLOF creates
it for PCI bridges and since they have different sizes, patching phandles
at fixed offset fails.
Rather than skipping certain nodes in the SLOF tree, this uses different
approach: now we read the QEMU FDT in 3 passes:
1. find all phandle/linux-phandle properties and store these in the SLOF
internal tree to allow phandle->node lookup later;
2. walk through all FDT properties, patch them if needed using
phandles from the SLOF tree and save patched values in SLOF properties;
3. delete phandle/linux-phandle properties created in 1. This is safe
as SLOF does not create these properties anyway.
Fixes: 44d06f9e68cf ("fdt: Update phandles after H_CAS")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2 files changed
