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(parent: 7d8bad9) | patch
powerpc/fsl: Emulate SPRN_BUCSR register
authorDiana Craciun <diana.craciun@nxp.com>
Wed, 12 Dec 2018 14:03:03 +0000 (16:03 +0200)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 20 Dec 2018 11:59:03 +0000 (22:59 +1100)
commit98518c4d8728656db349f875fcbbc7c126d4c973
treea0291c2161d8120adc257b786e2097160de54441tree | snapshot
parent7d8bad99ba5a22892f0cad6881289fdc3875a930commit | diff
powerpc/fsl: Emulate SPRN_BUCSR register

In order to flush the branch predictor the guest kernel performs
writes to the BUCSR register which is hypervisor privilleged. However,
the branch predictor is flushed at each KVM entry, so the branch
predictor has been already flushed, so just return as soon as possible
to guest.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
[mpe: Tweak comment formatting]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kvm/e500_emulate.c diff | blob | history
kernel
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