linux-arm.git - Russell King's ARM Linux kernel tree

Age	Commit message (Collapse)	Author
2024-09-13	random: vDSO: add a __vdso_getrandom prototype for all architectures	Xi Ruoyao
	Without a prototype, we'll have to add a prototype for each architecture implementing vDSO getrandom. As most architectures will likely have the vDSO getrandom implemented in a near future, and we'd like to keep the declarations compatible everywhere (to ease the libc implementor work), we should really just have one copy of the prototype. This also is what's already done inside of include/vdso/gettime.h for those vDSO functions, so this continues that convention. Suggested-by: Huacai Chen <chenhuacai@kernel.org> Signed-off-by: Xi Ruoyao <xry111@xry111.site> Acked-by: Huacai Chen <chenhuacai@kernel.org> [Jason: rewrite docbook comment for prototype.] Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2024-07-19	x86: vdso: Wire up getrandom() vDSO implementation	Jason A. Donenfeld
	Hook up the generic vDSO implementation to the x86 vDSO data page. Since the existing vDSO infrastructure is heavily based on the timekeeping functionality, which works over arrays of bases, a new macro is introduced for vvars that are not arrays. The vDSO function requires a ChaCha20 implementation that does not write to the stack, yet can still do an entire ChaCha20 permutation, so provide this using SSE2, since this is userland code that must work on all x86-64 processors. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Samuel Neves <sneves@dei.uc.pt> # for vgetrandom-chacha.S Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>