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linux: drop flash@0 from the virt64 guest DT #327

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Merged
daniel-rossier merged 1 commit into from
Sep 8, 2026
Merged

linux: drop flash@0 from the virt64 guest DT #327

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18 changes: 12 additions & 6 deletions build/meta-linux/recipes-linux/linux/files/0001-linux-6.12-r0/0002-virt64_guest.dts.patch
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
--- /dev/null 2026-03-20 16:30:38.468300202 +0100
+++ ./arch/arm64/boot/dts/arm/virt64_guest.dts 2026-03-20 16:55:19.220277261 +0100
@@ -0,0 +1,425 @@
@@ -0,0 +1,431 @@
+/dts-v1/;
+
+/ {
Expand Down Expand Up @@ -324,11 +324,17 @@
+ };
+ };
+
+ flash@0 {
+ bank-width = <0x04>;
+ reg = <0x00 0x00 0x00 0x4000000 0x00 0x4000000 0x00 0x4000000>;
+ compatible = "cfi-flash";
+ };
+ /*
+ * No flash@0 here, on purpose. The QEMU CFI pflash at address 0
+ * belongs to the firmware, not to the guest: AVZ's agency_ipamap
+ * (arch/arm64/virt64/include/mach/ipamap.h) maps nothing below
+ * 0x08000000, so the region this node describes is simply not
+ * backed for the guest. Measured on virt64/AVZ with the node
+ * present and CONFIG_MTD_PHYSMAP_OF=y: the guest probes it and
+ * gets "physmap-flash 0.flash: map_probe failed" — harmless, but a
+ * failed probe and a misleading log line on every boot. The bare
+ * virt64.dts keeps the node, where address 0 really is the pflash.
+ */
+
+ cpus {
+ #size-cells = <0x00>;
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