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kpti: Disable when running under Xen PV
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Sun, 7 Jan 2018 05:17:15 +0000 (00:17 -0500)
committerKirtikar Kashyap <kirtikar.kashyap@oracle.com>
Fri, 12 Jan 2018 18:20:12 +0000 (10:20 -0800)
commit7bd5f6122113ffa9b26d0df4c5a19bd429ad7181
treeac85f20888394d477c9838933eaa1393f0906327tree
parent233c4586f66e37a52a5e521d256aa55fa138a6c0commit | diff
kpti: Disable when running under Xen PV

Very very partial backport from aa8c6248f8c75 where
there is a check to see if this is an Xen PV guest - and
if so disable it.

The reason is that the PV ABI would require a major
overhaul to be Meltdown resistent.

Instead there are mitigations (PV in HVM) which are far more
suitable.

Orabug: 27333760
CVE: CVE-2017-5754

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Kirtikar Kashyap <kirtikar.kashyap@oracle.com>
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