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LoongArch: vDSO: Wire up getrandom() vDSO implementation

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Hook up the generic vDSO implementation to the LoongArch vDSO data page
by providing the required __arch_chacha20_blocks_nostack,
__arch_get_k_vdso_rng_data, and getrandom_syscall implementations. Also
wire up the selftests.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Acked-by: Huacai Chen <chenhuacai@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Xi Ruoyao
2024-09-01 14:13:11 +08:00
committed by Jason A. Donenfeld
parent 4d456f0c87
commit 18efd0b10e
11 changed files with 316 additions and 2 deletions
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7
arch/loongarch/vdso/Makefile
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@@ -4,7 +4,8 @@
# Include the generic Makefile to check the built vdso.
include $(srctree)/lib/vdso/Makefile
obj-vdso-y := elf.o vgetcpu.o vgettimeofday.o sigreturn.o
obj-vdso-y := elf.o vgetcpu.o vgettimeofday.o vgetrandom.o \
vgetrandom-chacha.o sigreturn.o
# Common compiler flags between ABIs.
ccflags-vdso := \
@@ -29,6 +30,10 @@ ifneq ($(c-gettimeofday-y),)
CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
endif
ifneq ($(c-getrandom-y),)
CFLAGS_vgetrandom.o += -include $(c-getrandom-y)
endif
# VDSO linker flags.
ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
$(filter -E%,$(KBUILD_CFLAGS)) -nostdlib -shared \