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x86/idle: Disable IBRS when offlining cpu and re-enable on wakeup
authorTim Chen <tim.c.chen@linux.intel.com>
Fri, 22 Dec 2017 01:24:24 +0000 (20:24 -0500)
committerKirtikar Kashyap <kirtikar.kashyap@oracle.com>
Fri, 12 Jan 2018 18:19:55 +0000 (10:19 -0800)
commit4963d177f90d0ce4a63c0dcdb86acc9fd4919fca
treebed054596dad3be0580d2e2e9da62df6e34403fatree
parent74e3d3aee8471aaad174d68ae9733a0b88e36d58commit | diff
x86/idle: Disable IBRS when offlining cpu and re-enable on wakeup

Clear IBRS when cpu is offlined and set it when bringing it back online.

Orabug: 27344012
CVE: CVE-2017-5715

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: John Haxby <john.haxby@oracle.com>
Signed-off-by: Kirtikar Kashyap <kirtikar.kashyap@oracle.com>
arch/x86/kernel/smpboot.c diff | blob | history
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