[PATCH v2 1/4] Support for building in a Xen binary
Andre Przywara
andre.przywara at arm.com
Tue Nov 22 07:09:14 PST 2016
From: Christoffer Dall <christoffer.dall at linaro.org>
Add support for building a Xen binary which includes a Dom0 image and
the Dom0 command-line.
If the user specifies --with-xen=<Xen>, where Xen is an appropriate
AArch64 Xen binary, the build system will generate a xen-system.axf
instead of a linux-system.axf.
Original patch from Ian Campbell, but I modified most of it so all bugs
are probably mine.
[Andre: adapt to newest boot-wrapper branch, increase load address,
fixup Xen image file test]
Cc: Ian Campbell <ijc at hellion.org.uk>
Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
.gitignore | 1 +
Makefile.am | 10 +++++++---
boot_common.c | 4 ++--
configure.ac | 17 +++++++++++++++++
model.lds.S | 14 ++++++++++++++
5 files changed, 41 insertions(+), 5 deletions(-)
diff --git a/.gitignore b/.gitignore
index 8653852..80770c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,7 @@ configure
dtc
fdt.dtb
Image
+Xen
install-sh
Makefile
Makefile.in
diff --git a/Makefile.am b/Makefile.am
index 692d2cc..f8b9ec9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -85,7 +85,6 @@ TEXT_LIMIT := 0x80080000
endif
LD_SCRIPT := model.lds.S
-IMAGE := linux-system.axf
FS_OFFSET := 0x10000000
FILESYSTEM_START:= $(shell echo $$(($(PHYS_OFFSET) + $(FS_OFFSET))))
@@ -94,6 +93,11 @@ FILESYSTEM_END := $(shell echo $$(($(FILESYSTEM_START) + $(FILESYSTEM_SIZE))))
FDT_OFFSET := 0x08000000
+if XEN
+XEN := -DXEN=$(XEN_IMAGE)
+XEN_OFFSET := 0x08200000
+endif
+
if INITRD
INITRD_FLAGS := -DUSE_INITRD
CHOSEN_NODE := chosen { \
@@ -121,7 +125,7 @@ all: $(IMAGE)
CLEANFILES = $(IMAGE) $(OFILES) model.lds fdt.dtb
-$(IMAGE): $(OFILES) model.lds fdt.dtb $(KERNEL_IMAGE) $(FILESYSTEM)
+$(IMAGE): $(OFILES) model.lds fdt.dtb $(KERNEL_IMAGE) $(FILESYSTEM) $(XEN_IMAGE)
$(LD) $(LDFLAGS) $(OFILES) -o $@ --script=model.lds
%.o: %.S Makefile
@@ -131,7 +135,7 @@ $(IMAGE): $(OFILES) model.lds fdt.dtb $(KERNEL_IMAGE) $(FILESYSTEM)
$(CC) $(CPPFLAGS) $(CFLAGS) $(DEFINES) -c -o $@ $<
model.lds: $(LD_SCRIPT) Makefile
- $(CPP) $(CPPFLAGS) -ansi -DPHYS_OFFSET=$(PHYS_OFFSET) -DMBOX_OFFSET=$(MBOX_OFFSET) -DKERNEL_OFFSET=$(KERNEL_OFFSET) -DFDT_OFFSET=$(FDT_OFFSET) -DFS_OFFSET=$(FS_OFFSET) -DKERNEL=$(KERNEL_IMAGE) -DFILESYSTEM=$(FILESYSTEM) -DTEXT_LIMIT=$(TEXT_LIMIT) -P -C -o $@ $<
+ $(CPP) $(CPPFLAGS) -ansi -DPHYS_OFFSET=$(PHYS_OFFSET) -DMBOX_OFFSET=$(MBOX_OFFSET) -DKERNEL_OFFSET=$(KERNEL_OFFSET) -DFDT_OFFSET=$(FDT_OFFSET) -DFS_OFFSET=$(FS_OFFSET) $(XEN) -DXEN_OFFSET=$(XEN_OFFSET) -DKERNEL=$(KERNEL_IMAGE) -DFILESYSTEM=$(FILESYSTEM) -DTEXT_LIMIT=$(TEXT_LIMIT) -P -C -o $@ $<
fdt.dtb: $(KERNEL_DTB) Makefile gen-cpu-nodes.sh
( $(DTC) -O dts -I dtb $(KERNEL_DTB) ; echo "/ { $(CHOSEN_NODE) $(PSCI_NODE) $(CPUS_NODE) };" ) | $(DTC) -O dtb -o $@ -
diff --git a/boot_common.c b/boot_common.c
index 4947fe3..e7b8e1d 100644
--- a/boot_common.c
+++ b/boot_common.c
@@ -9,7 +9,7 @@
#include <cpu.h>
#include <spin.h>
-extern unsigned long kernel;
+extern unsigned long entrypoint;
extern unsigned long dtb;
void init_platform(void);
@@ -67,7 +67,7 @@ void __noreturn first_spin(unsigned int cpu, unsigned long *mbox,
if (cpu == 0) {
init_platform();
- *mbox = (unsigned long)&kernel;
+ *mbox = (unsigned long)&entrypoint;
sevl();
spin(mbox, invalid, 1);
} else {
diff --git a/configure.ac b/configure.ac
index ab8f5b3..f7e24c7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,18 @@ AC_ARG_WITH([dtb],
AS_HELP_STRING([--with-dtb], [Specify a particular DTB to use]),
[KERN_DTB="$withval"])
+AC_ARG_WITH([xen],
+ AS_HELP_STRING([--with-xen], [Compile for Xen, and Specify a particular Xen to use]),
+ X_IMAGE=$withval)
+
+AS_IF([test "x$X_IMAGE" == "x"], [],
+ [AS_IF([test ! -f "$X_IMAGE"],
+ [AC_MSG_ERROR([Could not find Xen hypervisor binary: $X_IMAGE])]
+ )]
+)
+AC_SUBST([XEN_IMAGE], [$X_IMAGE])
+AM_CONDITIONAL([XEN], [test "x$X_IMAGE" != "x"])
+
# Ensure that the user has provided us with a sane kernel dir.
m4_define([CHECKFILES], [KERN_DIR,
KERN_DTB,
@@ -50,6 +62,10 @@ m4_foreach([checkfile], [CHECKFILES],
AC_SUBST([KERNEL_IMAGE], [$KERN_IMAGE])
AC_SUBST([KERNEL_DTB], [$KERN_DTB])
+AS_IF([test "x$X_IMAGE" != "x"],
+ [AC_SUBST([IMAGE], ["xen-system.axf"])],
+ [AC_SUBST([IMAGE], ["linux-system.axf"])]
+)
# Allow a user to pass --enable-psci
AC_ARG_ENABLE([psci],
@@ -119,4 +135,5 @@ echo " CPU IDs: ${CPU_IDS}"
echo " Use GICv3? ${USE_GICV3}"
echo " Boot-wrapper execution state: AArch${BOOTWRAPPER_ES}"
echo " Kernel execution state: AArch${KERNEL_ES}"
+echo " Xen image ${XEN_IMAGE:-NONE}"
echo ""
diff --git a/model.lds.S b/model.lds.S
index 51c5684..511f552 100644
--- a/model.lds.S
+++ b/model.lds.S
@@ -16,6 +16,9 @@ OUTPUT_ARCH(aarch64)
#endif
TARGET(binary)
+#ifdef XEN
+INPUT(XEN)
+#endif
INPUT(KERNEL)
INPUT(./fdt.dtb)
@@ -36,6 +39,17 @@ SECTIONS
KERNEL
}
+#ifdef XEN
+ .xen (PHYS_OFFSET + XEN_OFFSET): {
+ xen = .;
+ XEN
+ }
+
+ entrypoint = xen;
+#else
+ entrypoint = kernel;
+#endif
+
.dtb (PHYS_OFFSET + FDT_OFFSET): {
dtb = .;
./fdt.dtb
--
2.9.0
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