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authorAlexey Kardashevskiy <aik@au1.ibm.com>2011-03-02 15:18:48 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-04-27 14:18:19 +1000
commitefcac6589a277c10060e4be44b9455cf43838dc1 (patch)
treed2236c1e9385baff297f0652c5a22b74f6acb149 /drivers/video
parentf0aae3238fc1c28b543cbaaa0e7c5d57685f5f89 (diff)
powerpc: Per process DSCR + some fixes (try#4)
The DSCR (aka Data Stream Control Register) is supported on some server PowerPC chips and allow some control over the prefetch of data streams. This patch allows the value to be specified per thread by emulating the corresponding mfspr and mtspr instructions. Children of such threads inherit the value. Other threads use a default value that can be specified in sysfs - /sys/devices/system/cpu/dscr_default. If a thread starts with non default value in the sysfs entry, all children threads inherit this non default value even if the sysfs value is changed later. Signed-off-by: Alexey Kardashevskiy <aik@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/video')
0 files changed, 0 insertions, 0 deletions