Re: [PATCH] powerpc: warn on emulation of dcbz instruction
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2021-09-17 12:39:36
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On Thu, 2021-09-16 at 14:36 +0000, David Laight wrote:
quoted
Does userspace accesses non-cached memory directly ?It probably can if a driver mmaps PCI space directly into user space. That certainly works on x86-64.
The posterchild for that is Xorg Cheers, Ben.