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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-08 12:46:50 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-08 12:46:50 +0100 |
| commit | 8bb9b9ccff5b7ce5084b5111244a92fd1d0daf16 (patch) | |
| tree | c4d42efe0fdde7dc07e469939bc1f17c7886f213 /arch/powerpc | |
| parent | KVM: VMX: disable PEBS before a guest entry (diff) | |
| parent | KVM: PPC: Book3S HV: Sanitize special-purpose register values on guest exit (diff) | |
| download | linux-8bb9b9ccff5b7ce5084b5111244a92fd1d0daf16.tar.xz linux-8bb9b9ccff5b7ce5084b5111244a92fd1d0daf16.zip | |
Merge branch 'kvm-ppc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
Diffstat (limited to 'arch/powerpc')
| -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 6ee26de9a1de..25ae2c9913c3 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 */ |