The phandle allocator was removed because static values were sufficient
for creating a common irqchip. With adding multiple virtual IOMMUs to the
device-tree, there is a need for a dynamic allocation of phandles. Add a
simple allocator that returns values above the static ones.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx>
---
Makefile | 1 +
arm/include/arm-common/fdt-arch.h | 2 +-
fdt.c | 15 +++++++++++++++
include/kvm/fdt.h | 13 +++++++++++++
mips/include/kvm/fdt-arch.h | 2 +-
powerpc/include/kvm/fdt-arch.h | 2 +-
x86/include/kvm/fdt-arch.h | 2 +-
7 files changed, 33 insertions(+), 4 deletions(-)
create mode 100644 fdt.c
diff --git a/Makefile b/Makefile
index 6d5f5d9d..3e21c597 100644
--- a/Makefile
+++ b/Makefile
@@ -303,6 +303,7 @@ ifeq (y,$(ARCH_WANT_LIBFDT))
CFLAGS_STATOPT += -DCONFIG_HAS_LIBFDT
LIBS_DYNOPT += -lfdt
LIBS_STATOPT += -lfdt
+ OBJS += fdt.o
endif
endif
diff --git a/arm/include/arm-common/fdt-arch.h b/arm/include/arm-common/fdt-arch.h
index 60c2d406..ed4ff3d4 100644
--- a/arm/include/arm-common/fdt-arch.h
+++ b/arm/include/arm-common/fdt-arch.h
@@ -1,6 +1,6 @@
#ifndef ARM__FDT_H
#define ARM__FDT_H
-enum phandles {PHANDLE_RESERVED = 0, PHANDLE_GIC, PHANDLE_MSI, PHANDLES_MAX};
+enum phandles {PHANDLE_RESERVED = 0, PHANDLE_GIC, PHANDLE_MSI, ARCH_PHANDLES_MAX};
#endif /* ARM__FDT_H */
diff --git a/fdt.c b/fdt.c
new file mode 100644
index 00000000..6db03d4e
--- /dev/null
+++ b/fdt.c
@@ -0,0 +1,15 @@
+/*
+ * Commonly used FDT functions.
+ */
+
+#include "kvm/fdt.h"
+
+static u32 next_phandle = PHANDLE_RESERVED;
+
+u32 fdt_alloc_phandle(void)
+{
+ if (next_phandle == PHANDLE_RESERVED)
+ next_phandle = ARCH_PHANDLES_MAX;
+
+ return next_phandle++;
+}
diff --git a/include/kvm/fdt.h b/include/kvm/fdt.h
index beadc7f3..503887f9 100644
--- a/include/kvm/fdt.h
+++ b/include/kvm/fdt.h
@@ -35,4 +35,17 @@ enum irq_type {
} \
} while (0)
+#ifdef CONFIG_HAS_LIBFDT
+
+u32 fdt_alloc_phandle(void);
+
+#else
+
+static inline u32 fdt_alloc_phandle(void)
+{
+ return PHANDLE_RESERVED;
+}
+
+#endif /* CONFIG_HAS_LIBFDT */
+
#endif /* KVM__FDT_H */
diff --git a/mips/include/kvm/fdt-arch.h b/mips/include/kvm/fdt-arch.h
index b0302457..3d004117 100644
--- a/mips/include/kvm/fdt-arch.h
+++ b/mips/include/kvm/fdt-arch.h
@@ -1,6 +1,6 @@
#ifndef KVM__KVM_FDT_H
#define KVM__KVM_FDT_H
-enum phandles {PHANDLE_RESERVED = 0, PHANDLES_MAX};
+enum phandles {PHANDLE_RESERVED = 0, ARCH_PHANDLES_MAX};
#endif /* KVM__KVM_FDT_H */
diff --git a/powerpc/include/kvm/fdt-arch.h b/powerpc/include/kvm/fdt-arch.h
index d48c0554..4ae4d3a0 100644
--- a/powerpc/include/kvm/fdt-arch.h
+++ b/powerpc/include/kvm/fdt-arch.h
@@ -1,6 +1,6 @@
#ifndef KVM__KVM_FDT_H
#define KVM__KVM_FDT_H
-enum phandles {PHANDLE_RESERVED = 0, PHANDLE_XICP, PHANDLES_MAX};
+enum phandles {PHANDLE_RESERVED = 0, PHANDLE_XICP, ARCH_PHANDLES_MAX};
#endif /* KVM__KVM_FDT_H */
diff --git a/x86/include/kvm/fdt-arch.h b/x86/include/kvm/fdt-arch.h
index eebd73f9..aba06ad8 100644
--- a/x86/include/kvm/fdt-arch.h
+++ b/x86/include/kvm/fdt-arch.h
@@ -1,6 +1,6 @@
#ifndef X86__FDT_ARCH_H
#define X86__FDT_ARCH_H
-enum phandles {PHANDLE_RESERVED = 0, PHANDLES_MAX};
+enum phandles {PHANDLE_RESERVED = 0, ARCH_PHANDLES_MAX};
#endif /* KVM__KVM_FDT_H */
--
2.12.1
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