From: Oded Gabbay <oded.gabbay@amd.com>
Date: Fri, 5 Dec 2014 08:40:34 +0000 (+0200)
Subject: amdkfd: Disable support for 32-bit user processes
X-Git-Tag: omap-for-v3.19/fixes-rc1~80^2~7^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a18069c132cb0d065ff23c05977d06ea0c78404f;p=pandora-kernel.git

amdkfd: Disable support for 32-bit user processes

This patch checks if the process that opens the /dev/kfd device is 32-bit
process. If so, it returns -EPERM and prints a warning message in dmesg.

This is done to prevent 32-bit user processes from using amdkfd, and hence, HSA
features.

AMD's HSA userspace stack will also support only 64-bit processes on Linux.

Reviewed-by: Alexey Skidanov <alexey.skidanov@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
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