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riscv: Implement cmpxchg32/64() using Zacas
authorAlexandre Ghiti <alexghiti@rivosinc.com>
Sun, 3 Nov 2024 14:51:43 +0000 (15:51 +0100)
committerPalmer Dabbelt <palmer@rivosinc.com>
Mon, 11 Nov 2024 15:33:10 +0000 (07:33 -0800)
commit38acdee32d23f789e866488c99867fd497d43c86
treef64aabe557031bb7e65be738a935858583227530tree | snapshot
parentaf042c457db07db4bc1baa5c22d089cab69cfc5bcommit | diff
riscv: Implement cmpxchg32/64() using Zacas

This adds runtime support for Zacas in cmpxchg operations.

Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Andrea Parri <parri.andrea@gmail.com>
Link: https://lore.kernel.org/r/20241103145153.105097-4-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
arch/riscv/Kconfig diff | blob | history
arch/riscv/Makefile diff | blob | history
arch/riscv/include/asm/cmpxchg.h diff | blob | history
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