[kvmtool PATCH v10 01/15] FDT: use static phandles
Andre Przywara
andre.przywara at arm.com
Tue Apr 25 10:39:18 EDT 2017
The current implementation of fdt__alloc_phandle() suffers from being
implemented in a static inline function situated in a header file.
This will only create expected results within a single compilation
unit.
It seems a bit over the top to use a function to allocate phandles,
when at the end of the day a phandle is just a unique identifier.
To simplify things - especially with upcoming patches - we just
introduce an enum per architecture to hold all possible phandle sources
and use that instead of the dynamic allocation.
Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
arm/aarch32/include/kvm/fdt-arch.h | 6 ++++++
arm/aarch64/include/kvm/fdt-arch.h | 6 ++++++
arm/fdt.c | 7 +++----
arm/include/arm-common/fdt-arch.h | 6 ++++++
include/kvm/fdt.h | 8 ++------
mips/include/kvm/fdt-arch.h | 6 ++++++
powerpc/include/kvm/fdt-arch.h | 6 ++++++
powerpc/kvm.c | 2 --
x86/include/kvm/fdt-arch.h | 6 ++++++
9 files changed, 41 insertions(+), 12 deletions(-)
create mode 100644 arm/aarch32/include/kvm/fdt-arch.h
create mode 100644 arm/aarch64/include/kvm/fdt-arch.h
create mode 100644 arm/include/arm-common/fdt-arch.h
create mode 100644 mips/include/kvm/fdt-arch.h
create mode 100644 powerpc/include/kvm/fdt-arch.h
create mode 100644 x86/include/kvm/fdt-arch.h
diff --git a/arm/aarch32/include/kvm/fdt-arch.h b/arm/aarch32/include/kvm/fdt-arch.h
new file mode 100644
index 0000000..e448bf1
--- /dev/null
+++ b/arm/aarch32/include/kvm/fdt-arch.h
@@ -0,0 +1,6 @@
+#ifndef KVM__KVM_FDT_H
+#define KVM__KVM_FDT_H
+
+#include "arm-common/fdt-arch.h"
+
+#endif /* KVM__KVM_FDT_H */
diff --git a/arm/aarch64/include/kvm/fdt-arch.h b/arm/aarch64/include/kvm/fdt-arch.h
new file mode 100644
index 0000000..e448bf1
--- /dev/null
+++ b/arm/aarch64/include/kvm/fdt-arch.h
@@ -0,0 +1,6 @@
+#ifndef KVM__KVM_FDT_H
+#define KVM__KVM_FDT_H
+
+#include "arm-common/fdt-arch.h"
+
+#endif /* KVM__KVM_FDT_H */
diff --git a/arm/fdt.c b/arm/fdt.c
index 381d48f..bcd0c3a 100644
--- a/arm/fdt.c
+++ b/arm/fdt.c
@@ -114,7 +114,6 @@ static int setup_fdt(struct kvm *kvm)
{
struct device_header *dev_hdr;
u8 staging_fdt[FDT_MAX_SIZE];
- u32 gic_phandle = fdt__alloc_phandle();
u64 mem_reg_prop[] = {
cpu_to_fdt64(kvm->arch.memory_guest_start),
cpu_to_fdt64(kvm->ram_size),
@@ -134,7 +133,7 @@ static int setup_fdt(struct kvm *kvm)
/* Header */
_FDT(fdt_begin_node(fdt, ""));
- _FDT(fdt_property_cell(fdt, "interrupt-parent", gic_phandle));
+ _FDT(fdt_property_cell(fdt, "interrupt-parent", PHANDLE_GIC));
_FDT(fdt_property_string(fdt, "compatible", "linux,dummy-virt"));
_FDT(fdt_property_cell(fdt, "#address-cells", 0x2));
_FDT(fdt_property_cell(fdt, "#size-cells", 0x2));
@@ -166,7 +165,7 @@ static int setup_fdt(struct kvm *kvm)
/* CPU and peripherals (interrupt controller, timers, etc) */
generate_cpu_nodes(fdt, kvm);
if (generate_cpu_peripheral_fdt_nodes)
- generate_cpu_peripheral_fdt_nodes(fdt, kvm, gic_phandle);
+ generate_cpu_peripheral_fdt_nodes(fdt, kvm, PHANDLE_GIC);
/* Virtio MMIO devices */
dev_hdr = device__first_dev(DEVICE_BUS_MMIO);
@@ -185,7 +184,7 @@ static int setup_fdt(struct kvm *kvm)
}
/* PCI host controller */
- pci__generate_fdt_nodes(fdt, gic_phandle);
+ pci__generate_fdt_nodes(fdt, PHANDLE_GIC);
/* PSCI firmware */
_FDT(fdt_begin_node(fdt, "psci"));
diff --git a/arm/include/arm-common/fdt-arch.h b/arm/include/arm-common/fdt-arch.h
new file mode 100644
index 0000000..53ba633
--- /dev/null
+++ b/arm/include/arm-common/fdt-arch.h
@@ -0,0 +1,6 @@
+#ifndef ARM__FDT_H
+#define ARM__FDT_H
+
+enum phandles {PHANDLE_RESERVED = 0, PHANDLE_GIC, PHANDLES_MAX};
+
+#endif /* ARM__FDT_H */
diff --git a/include/kvm/fdt.h b/include/kvm/fdt.h
index 53d85a4..beadc7f 100644
--- a/include/kvm/fdt.h
+++ b/include/kvm/fdt.h
@@ -7,6 +7,8 @@
#include <linux/types.h>
+#include "kvm/fdt-arch.h"
+
#define FDT_MAX_SIZE 0x10000
/* Those definitions are generic FDT values for specifying IRQ
@@ -33,10 +35,4 @@ enum irq_type {
} \
} while (0)
-static inline u32 fdt__alloc_phandle(void)
-{
- static u32 phandle = 0;
- return ++phandle;
-}
-
#endif /* KVM__FDT_H */
diff --git a/mips/include/kvm/fdt-arch.h b/mips/include/kvm/fdt-arch.h
new file mode 100644
index 0000000..b030245
--- /dev/null
+++ b/mips/include/kvm/fdt-arch.h
@@ -0,0 +1,6 @@
+#ifndef KVM__KVM_FDT_H
+#define KVM__KVM_FDT_H
+
+enum phandles {PHANDLE_RESERVED = 0, PHANDLES_MAX};
+
+#endif /* KVM__KVM_FDT_H */
diff --git a/powerpc/include/kvm/fdt-arch.h b/powerpc/include/kvm/fdt-arch.h
new file mode 100644
index 0000000..d48c055
--- /dev/null
+++ b/powerpc/include/kvm/fdt-arch.h
@@ -0,0 +1,6 @@
+#ifndef KVM__KVM_FDT_H
+#define KVM__KVM_FDT_H
+
+enum phandles {PHANDLE_RESERVED = 0, PHANDLE_XICP, PHANDLES_MAX};
+
+#endif /* KVM__KVM_FDT_H */
diff --git a/powerpc/kvm.c b/powerpc/kvm.c
index 3c1596d..c738c1d 100644
--- a/powerpc/kvm.c
+++ b/powerpc/kvm.c
@@ -40,8 +40,6 @@
#define HUGETLBFS_PATH "/var/lib/hugetlbfs/global/pagesize-16MB/"
-#define PHANDLE_XICP 0x00001111
-
static char kern_cmdline[2048];
struct kvm_ext kvm_req_ext[] = {
diff --git a/x86/include/kvm/fdt-arch.h b/x86/include/kvm/fdt-arch.h
new file mode 100644
index 0000000..eebd73f
--- /dev/null
+++ b/x86/include/kvm/fdt-arch.h
@@ -0,0 +1,6 @@
+#ifndef X86__FDT_ARCH_H
+#define X86__FDT_ARCH_H
+
+enum phandles {PHANDLE_RESERVED = 0, PHANDLES_MAX};
+
+#endif /* KVM__KVM_FDT_H */
--
2.9.0
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