mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 10:11:27 +01:00
Ian Campbell
a71ad0fead
libxengnttab will provide a stable API and ABI for accessing the
grant table devices.
The functions are moved into the xengnt{tab,shr} namespace to make a
clean break from libxc and avoid ambiguity regarding which interfaces
are stable.
All in-tree users are updated to use the new names.
Upon request (via #define XC_WANT_COMPAT_GNTTAB_API) libxenctrl will
provide a compat API for the old names. This is used by qemu-xen for
the time being. qemu-xen-traditional is updated in lockstep.
This leaves a few grant table related functions which go via privcmd
(GNTTABOP) rather than ioctls on the /dev/xen/gnt* devices in
libxenctrl. Specifically:
- xc_gnttab_get_version
- xc_gnttab_map_table_v1
- xc_gnttab_map_table_v2
- xc_gnttab_op
These functions do not appear to be needed by qemu-dm, qemu-pv
(provision of device model to HVM guests and PV backends respectively)
or by libvchan suggesting they are not needed by non-toolstack uses of
event channels.
The new library uses a version script to ensure that only expected
symbols are exported and to version them such that ABI guarantees can
be kept in the future.
After this change libxenvchan no longer needs to link against
libxenctrl. It still needs xenctrl.h in one file for xen_mb and
friends.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
[ ijc -- updated MINIOS_UPSTREAM_REVISION and QEMU_TRADITIONAL_REVISION ]
284 lines
9.6 KiB
Makefile
284 lines
9.6 KiB
Makefile
# -*- mode: Makefile; -*-
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ifeq ($(filter /%,$(XEN_ROOT)),)
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$(error XEN_ROOT must be absolute)
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endif
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# Convenient variables
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comma := ,
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squote := '
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empty :=
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space := $(empty) $(empty)
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# fallback for older make
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realpath = $(wildcard $(foreach file,$(1),$(shell cd -P $(dir $(file)) && echo "$$PWD/$(notdir $(file))")))
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or = $(if $(strip $(1)),$(1),$(if $(strip $(2)),$(2),$(if $(strip $(3)),$(3),$(if $(strip $(4)),$(4)))))
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-include $(XEN_ROOT)/.config
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# A debug build of Xen and tools?
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debug ?= y
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debug_symbols ?= $(debug)
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# Test coverage support
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coverage ?= n
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XEN_COMPILE_ARCH ?= $(shell uname -m | sed -e s/i.86/x86_32/ \
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-e s/i86pc/x86_32/ -e s/amd64/x86_64/ \
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-e s/armv7.*/arm32/ -e s/armv8.*/arm64/ \
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-e s/aarch64/arm64/)
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XEN_TARGET_ARCH ?= $(XEN_COMPILE_ARCH)
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XEN_OS ?= $(shell uname -s)
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CONFIG_$(XEN_OS) := y
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SHELL ?= /bin/sh
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# Tools to run on system hosting the build
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HOSTCC = gcc
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HOSTCFLAGS = -Wall -Werror -Wstrict-prototypes -O2 -fomit-frame-pointer
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HOSTCFLAGS += -fno-strict-aliasing
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DISTDIR ?= $(XEN_ROOT)/dist
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DESTDIR ?= /
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# Allow phony attribute to be listed as dependency rather than fake target
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.PHONY: .phony
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# Use Clang/LLVM instead of GCC?
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clang ?= n
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ifeq ($(clang),n)
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gcc := y
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else
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gcc := n
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endif
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include $(XEN_ROOT)/config/$(XEN_OS).mk
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include $(XEN_ROOT)/config/$(XEN_TARGET_ARCH).mk
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# arguments: variable, common path part, path to test, if yes, if no
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define setvar_dir
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ifndef $(1)
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ifneq (,$(wildcard $(2)$(3)))
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$(1) ?= $(2)$(4)
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else
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$(1) ?= $(2)$(5)
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endif
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endif
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endef
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ifneq ($(EXTRA_PREFIX),)
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EXTRA_INCLUDES += $(EXTRA_PREFIX)/include
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EXTRA_LIB += $(EXTRA_PREFIX)/lib
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endif
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PYTHON ?= python
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PYTHON_PREFIX_ARG ?= --prefix="$(prefix)"
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# The above requires that prefix contains *no spaces*. This variable is here
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# to permit the user to set PYTHON_PREFIX_ARG to '' to workaround this bug:
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# https://bugs.launchpad.net/ubuntu/+bug/362570
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# cc-option: Check if compiler supports first option, else fall back to second.
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#
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# This is complicated by the fact that unrecognised -Wno-* options:
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# (a) are ignored unless the compilation emits a warning; and
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# (b) even then produce a warning rather than an error
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# To handle this we do a test compile, passing the option-under-test, on a code
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# fragment that will always produce a warning (integer assigned to pointer).
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# We then grep for the option-under-test in the compiler's output, the presence
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# of which would indicate an "unrecognized command-line option" warning/error.
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#
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# Usage: cflags-y += $(call cc-option,$(CC),-march=winchip-c6,-march=i586)
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cc-option = $(shell if test -z "`echo 'void*p=1;' | \
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$(1) $(2) -S -o /dev/null -x c - 2>&1 | grep -- $(2) -`"; \
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then echo "$(2)"; else echo "$(3)"; fi ;)
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# cc-option-add: Add an option to compilation flags, but only if supported.
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# Usage: $(call cc-option-add CFLAGS,CC,-march=winchip-c6)
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cc-option-add = $(eval $(call cc-option-add-closure,$(1),$(2),$(3)))
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define cc-option-add-closure
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ifneq ($$(call cc-option,$$($(2)),$(3),n),n)
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$(1) += $(3)
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endif
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endef
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cc-options-add = $(foreach o,$(3),$(call cc-option-add,$(1),$(2),$(o)))
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# cc-ver: Check compiler is at least specified version. Return boolean 'y'/'n'.
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# Usage: ifeq ($(call cc-ver,$(CC),0x030400),y)
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cc-ver = $(shell if [ $$((`$(1) -dumpversion | awk -F. \
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'{ printf "0x%02x%02x%02x", $$1, $$2, $$3}'`)) -ge $$(($(2))) ]; \
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then echo y; else echo n; fi ;)
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# cc-ver-check: Check compiler is at least specified version, else fail.
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# Usage: $(call cc-ver-check,CC,0x030400,"Require at least gcc-3.4")
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cc-ver-check = $(eval $(call cc-ver-check-closure,$(1),$(2),$(3)))
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define cc-ver-check-closure
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ifeq ($$(call cc-ver,$$($(1)),$(2)),n)
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override $(1) = echo "*** FATAL BUILD ERROR: "$(3) >&2; exit 1;
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cc-option := n
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endif
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endef
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# Require GCC v4.1+
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check-$(gcc) = $(call cc-ver-check,CC,0x040100,"Xen requires at least gcc-4.1")
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$(eval $(check-y))
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# as-insn: Check whether assembler supports an instruction.
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# Usage: cflags-y += $(call as-insn "insn",option-yes,option-no)
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as-insn = $(if $(shell echo 'void _(void) { asm volatile ( $(2) ); }' \
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| $(1) -c -x c -o /dev/null - 2>&1),$(4),$(3))
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# as-insn-check: Add an option to compilation flags, but only if insn is
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# supported by assembler.
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# Usage: $(call as-insn-check CFLAGS,CC,"nop",-DHAVE_GAS_NOP)
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as-insn-check = $(eval $(call as-insn-check-closure,$(1),$(2),$(3),$(4)))
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define as-insn-check-closure
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ifeq ($$(call as-insn,$$($(2)),$(3),y,n),y)
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$(1) += $(4)
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endif
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endef
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define buildmakevars2shellvars
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export PREFIX="$(prefix)"; \
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export XEN_SCRIPT_DIR="$(XEN_SCRIPT_DIR)"; \
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export XEN_ROOT="$(XEN_ROOT)"
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endef
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#
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# Compare $(1) and $(2) and replace $(2) with $(1) if they differ
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#
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# Typically $(1) is a newly generated file and $(2) is the target file
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# being regenerated. This prevents changing the timestamp of $(2) only
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# due to being auto regenereated with the same contents.
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define move-if-changed
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if ! cmp -s $(1) $(2); then mv -f $(1) $(2); else rm -f $(1); fi
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endef
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BUILD_MAKE_VARS := sbindir bindir LIBEXEC LIBEXEC_BIN libdir SHAREDIR \
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XENFIRMWAREDIR XEN_CONFIG_DIR XEN_SCRIPT_DIR XEN_LOCK_DIR \
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XEN_RUN_DIR XEN_PAGING_DIR XEN_DUMP_DIR
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buildmakevars2file = $(eval $(call buildmakevars2file-closure,$(1)))
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define buildmakevars2file-closure
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$(1): .phony
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rm -f $(1).tmp; \
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$(foreach var, $(BUILD_MAKE_VARS), \
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echo "$(var)=\"$($(var))\"" >>$(1).tmp;) \
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$(call move-if-changed,$(1).tmp,$(1))
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endef
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buildmakevars2header = $(eval $(call buildmakevars2header-closure,$(1)))
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define buildmakevars2header-closure
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$(1): .phony
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rm -f $(1).tmp; \
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$(foreach var, $(BUILD_MAKE_VARS), \
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echo "#define $(var) \"$($(var))\"" >>$(1).tmp;) \
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$(call move-if-changed,$(1).tmp,$(1))
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endef
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ifeq ($(debug_symbols),y)
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CFLAGS += -g
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endif
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CFLAGS += -fno-strict-aliasing
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CFLAGS += -std=gnu99
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CFLAGS += -Wall -Wstrict-prototypes
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# Clang complains about macros that expand to 'if ( ( foo == bar ) ) ...'
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# and is over-zealous with the printf format lint
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# and is a bit too fierce about unused return values
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CFLAGS-$(clang) += -Wno-parentheses -Wno-format -Wno-unused-value
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$(call cc-option-add,HOSTCFLAGS,HOSTCC,-Wdeclaration-after-statement)
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$(call cc-option-add,CFLAGS,CC,-Wdeclaration-after-statement)
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$(call cc-option-add,CFLAGS,CC,-Wno-unused-but-set-variable)
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$(call cc-option-add,CFLAGS,CC,-Wno-unused-local-typedefs)
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LDFLAGS += $(foreach i, $(EXTRA_LIB), -L$(i))
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CFLAGS += $(foreach i, $(EXTRA_INCLUDES), -I$(i))
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LDFLAGS += $(foreach i, $(PREPEND_LIB), -L$(i))
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CFLAGS += $(foreach i, $(PREPEND_INCLUDES), -I$(i))
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ifeq ($(XEN_TOOLS_RPATH),y)
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LDFLAGS += -Wl,-rpath,$(libdir)
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endif
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APPEND_LDFLAGS += $(foreach i, $(APPEND_LIB), -L$(i))
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APPEND_CFLAGS += $(foreach i, $(APPEND_INCLUDES), -I$(i))
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EMBEDDED_EXTRA_CFLAGS := -nopie -fno-stack-protector -fno-stack-protector-all
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EMBEDDED_EXTRA_CFLAGS += -fno-exceptions
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XEN_EXTFILES_URL ?= http://xenbits.xen.org/xen-extfiles
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# All the files at that location were downloaded from elsewhere on
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# the internet. The original download URL is preserved as a comment
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# near the place in the Xen Makefiles where the file is used.
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# Where to look for inlined subtrees (for example, from a tarball)
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QEMU_UPSTREAM_INTREE ?= $(XEN_ROOT)/tools/qemu-xen
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QEMU_TRADITIONAL_INTREE ?= $(XEN_ROOT)/tools/qemu-xen-traditional
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# Handle legacy options
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ifneq (,$(SEABIOS_UPSTREAM_TAG))
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SEABIOS_UPSTREAM_REVISION ?= $(SEABIOS_UPSTREAM_TAG)
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endif
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ifneq (,$(QEMU_REMOTE))
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QEMU_TRADITIONAL_URL ?= $(QEMU_REMOTE)
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endif
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ifneq (,$(CONFIG_QEMU))
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QEMU_TRADITIONAL_LOC ?= $(CONFIG_QEMU)
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endif
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ifneq (,$(QEMU_TAG))
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QEMU_TRADITIONAL_REVISION ?= $(QEMU_TAG)
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endif
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ifeq ($(GIT_HTTP),y)
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OVMF_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/ovmf.git
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QEMU_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/qemu-xen.git
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QEMU_TRADITIONAL_URL ?= http://xenbits.xen.org/git-http/qemu-xen-traditional.git
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SEABIOS_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/seabios.git
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MINIOS_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/mini-os.git
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else
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OVMF_UPSTREAM_URL ?= git://xenbits.xen.org/ovmf.git
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QEMU_UPSTREAM_URL ?= git://xenbits.xen.org/qemu-xen.git
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QEMU_TRADITIONAL_URL ?= git://xenbits.xen.org/qemu-xen-traditional.git
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SEABIOS_UPSTREAM_URL ?= git://xenbits.xen.org/seabios.git
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MINIOS_UPSTREAM_URL ?= git://xenbits.xen.org/mini-os.git
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endif
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OVMF_UPSTREAM_REVISION ?= 52a99493cce88a9d4ec8a02d7f1bd1a1001ce60d
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QEMU_UPSTREAM_REVISION ?= master
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MINIOS_UPSTREAM_REVISION ?= 9faa4c3b862291315912b81fe1d4ccca800f530d
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# Fri Jan 15 13:24:01 2016 +0000
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# mini-os: Include libxengnttab with libxc
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SEABIOS_UPSTREAM_REVISION ?= 3403ac4313812752be6e6aac35239ca6888a8cab
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# Mon Dec 28 13:50:41 2015 +0100
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# build: fix typo in buildversion.py
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ETHERBOOT_NICS ?= rtl8139 8086100e
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QEMU_TRADITIONAL_REVISION ?= d8b5666074fdbc4ddba5283d70898a2edd785028
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# Fri Jan 15 13:23:54 2016 +0000
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# qemu-xen-traditional: Use libxengnttab
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# Specify which qemu-dm to use. This may be `ioemu' to use the old
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# Mercurial in-tree version, or a local directory, or a git URL.
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# QEMU_UPSTREAM_LOC ?= `pwd`/$(XEN_ROOT)/../qemu-xen.git
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# Defaults for subtree locations
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QEMU_TRADITIONAL_LOC ?= $(call or,$(wildcard $(QEMU_TRADITIONAL_INTREE)),\
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$(QEMU_TRADITIONAL_URL))
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QEMU_UPSTREAM_LOC ?= $(call or,$(wildcard $(QEMU_UPSTREAM_INTREE)),\
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$(QEMU_UPSTREAM_URL))
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# Short answer -- do not enable this unless you know what you are
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# doing and are prepared for some pain.
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CONFIG_TESTS ?= y
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