diff options
| author | Mark Brown <broonie@kernel.org> | 2016-03-18 09:48:58 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-03-18 09:48:58 +0000 |
| commit | 917a9133a6b3c6cc2b6b5649d28c617a4ccac3e6 (patch) | |
| tree | 2d7ae3b1ae72fbad4f54eb39a651a2e51a79611e /arch/powerpc/kvm/book3s_hv_rmhandlers.S | |
| parent | ddbcfcba5fdc56f30e4d02c3bac8cf965502cece (diff) | |
| parent | 6d0b88c88bf58bfd89ffbdaa97b03617fe8c6478 (diff) | |
Merge remote-tracking branch 'lsk/linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4lsk-v4.4-16.03
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index e57cc383e5da..463af88c95a2 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -1370,6 +1370,20 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) std r6, VCPU_ACOP(r9) stw r7, VCPU_GUEST_PID(r9) std r8, VCPU_WORT(r9) + /* + * Restore various registers to 0, where non-zero values + * set by the guest could disrupt the host. + */ + li r0, 0 + mtspr SPRN_IAMR, r0 + mtspr SPRN_CIABR, r0 + mtspr SPRN_DAWRX, r0 + mtspr SPRN_TCSCR, r0 + mtspr SPRN_WORT, r0 + /* Set MMCRS to 1<<31 to freeze and disable the SPMC counters */ + li r0, 1 + sldi r0, r0, 31 + mtspr SPRN_MMCRS, r0 8: /* Save and reset AMR and UAMOR before turning on the MMU */ |