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linux-user/arm: Implement __kernel_memory_barrier

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This fallback syscall was stubbed out.
It would only matter for emulating pre-armv6.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220323005839.94327-2-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2022-03-22 17:58:37 -07:00 committed by Laurent Vivier
parent 879667433a
commit 6e05e7047c
1 changed files with 1 additions and 1 deletions
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linux-user/arm/cpu_loop.c
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@ -158,7 +158,7 @@ do_kernel_trap(CPUARMState *env)
switch (env->regs[15]) {
case 0xffff0fa0: /* __kernel_memory_barrier */
/* ??? No-op. Will need to do better for SMP. */
smp_mb();
break;
case 0xffff0fc0: /* __kernel_cmpxchg */
/* XXX: This only works between threads, not between processes.