mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-08-28 14:34:17 -04:00
f1bd7119ac
Make nova-core a build dependency of nova-drm, so its crate metadata is available and up-to-date when the latter is built. This is intended to be a workaround until the build system supports Rust cross-crate dependencies natively. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://patch.msgid.link/20260622-nova-exports-v5-4-6191773fc977@nvidia.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
67 lines
2.8 KiB
Makefile
67 lines
2.8 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
|
|
# drm/tegra depends on host1x, so if both drivers are built-in care must be
|
|
# taken to initialize them in the correct order. Link order is the only way
|
|
# to ensure this currently.
|
|
# Similarly, buddy must come first since it is used by other drivers.
|
|
obj-$(CONFIG_GPU_BUDDY) += buddy.o
|
|
obj-y += host1x/ drm/ vga/ tests/
|
|
obj-$(CONFIG_IMX_IPUV3_CORE) += ipu-v3/
|
|
obj-$(CONFIG_TRACE_GPU_MEM) += trace/
|
|
|
|
# nova-core and nova-drm are built from this Makefile so nova-drm's dependency
|
|
# on nova-core can be expressed as a plain Make prerequisite rather than a
|
|
# recursive sub-make. This is a temporary workaround until the Rust build
|
|
# system supports cross-crate dependencies natively.
|
|
|
|
obj-$(CONFIG_NOVA_CORE) += nova-core.o
|
|
nova-core-y := nova-core/nova_core.o nova-core/nova_core_exports.o
|
|
|
|
obj-$(CONFIG_DRM_NOVA) += nova-drm.o
|
|
nova-drm-y := drm/nova/nova.o
|
|
|
|
# Export Rust symbols from nova-core only if nova-drm actually references them.
|
|
nova-core-export-deps := $(if $(CONFIG_DRM_NOVA),$(obj)/drm/nova/nova.o)
|
|
|
|
rust_needed_exports = \
|
|
{ $(if $(strip $(2)),$(NM) -u $(2);,) echo "__DEFINED_RUST_SYMBOLS__"; \
|
|
$(NM) -p --defined-only $(1); } | \
|
|
awk -v fmt='$(3)' ' \
|
|
/^__DEFINED_RUST_SYMBOLS__$$/ { defs = 1; next } \
|
|
!defs { if ($$NF ~ /^_R/) needed[$$NF] = 1; next } \
|
|
defs && $$2 ~ /(T|R|D|B)/ && $$3 ~ /^_R/ && \
|
|
$$3 !~ /_(init|cleanup)_module$$/ && \
|
|
$$3 !~ /__(pfx|cfi|odr_asan)/ && \
|
|
$$3 in needed { printf fmt, $$3 } \
|
|
'
|
|
|
|
quiet_cmd_exports = EXPORTS $@
|
|
cmd_exports = \
|
|
$(call rust_needed_exports,$<,$(nova-core-export-deps),EXPORT_SYMBOL_RUST_GPL(%s);\n) > $@
|
|
|
|
$(obj)/nova-core/exports_nova_core_generated.h: $(obj)/nova-core/nova_core.o $(nova-core-export-deps) FORCE
|
|
$(call if_changed,exports)
|
|
|
|
targets += nova-core/exports_nova_core_generated.h
|
|
|
|
$(obj)/nova-core/nova_core_exports.o: $(obj)/nova-core/exports_nova_core_generated.h
|
|
CFLAGS_nova-core/nova_core_exports.o := -I $(objtree)/$(obj)/nova-core
|
|
|
|
ifdef CONFIG_MODVERSIONS
|
|
# The C export shim declares Rust symbols as `extern int`, so reuse its export
|
|
# list but generate symbol CRCs from the Rust object instead of the shim's DWARF.
|
|
$(obj)/nova-core/nova_core_exports.o: private cmd_gensymtypes_c = \
|
|
$(call getexportsymbols,\1) | \
|
|
$(objtree)/scripts/gendwarfksyms/gendwarfksyms \
|
|
$(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable) \
|
|
$(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes),) \
|
|
$(obj)/nova-core/nova_core.o
|
|
endif
|
|
|
|
# Output nova-core's crate metadata for use by nova-drm at compile time.
|
|
RUSTFLAGS_nova-core/nova_core.o += \
|
|
--emit=metadata=$(objtree)/$(obj)/nova-core/libnova_core.rmeta
|
|
|
|
# Allow nova-drm to import nova-core's types.
|
|
$(obj)/drm/nova/nova.o: $(obj)/nova-core/nova_core.o
|
|
RUSTFLAGS_drm/nova/nova.o := -L $(objtree)/$(obj)/nova-core --extern nova_core
|