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<updated>2025-06-05T21:03:09Z</updated>
<entry>
<title>RISC-V: vDSO: Wire up getrandom() vDSO implementation</title>
<updated>2025-06-05T21:03:09Z</updated>
<author>
<name>Xi Ruoyao</name>
<email>xry111@xry111.site</email>
</author>
<published>2025-04-11T02:46:00Z</published>
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<content type='text'>
Hook up the generic vDSO implementation to the generic vDSO getrandom
implementation by providing the required __arch_chacha20_blocks_nostack
and getrandom_syscall implementations. Also wire up the selftests.

The benchmark result:

	vdso: 25000000 times in 2.466341333 seconds
	libc: 25000000 times in 41.447720005 seconds
	syscall: 25000000 times in 41.043926672 seconds

	vdso: 25000000 x 256 times in 162.286219353 seconds
	libc: 25000000 x 256 times in 2953.855018685 seconds
	syscall: 25000000 x 256 times in 2796.268546000 seconds

[ alex: - Fix dynamic relocation
        - Squash Nathan's fix https://lore.kernel.org/all/20250423-riscv-fix-compat_vdso-lld-v2-1-b7bbbc244501@kernel.org/
	- Add comment from Loongarch ]

Signed-off-by: Xi Ruoyao &lt;xry111@xry111.site&gt;
Link: https://lore.kernel.org/r/20250411024600.16045-1-xry111@xry111.site
Tested-by: Alexandre Ghiti &lt;alexghiti@rivosinc.com&gt;
Signed-off-by: Alexandre Ghiti &lt;alexghiti@rivosinc.com&gt;
Signed-off-by: Palmer Dabbelt &lt;palmer@dabbelt.com&gt;
</content>
</entry>