diff options
| author | Diana Craciun <diana.craciun@nxp.com> | 2018-12-12 15:03:07 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-12-20 12:59:03 +0100 |
| commit | e7aa61f47b23afbec41031bc47ca8d6cb6516abc (patch) | |
| tree | fba9a1be4ce7035803f8833bda349a2a9518781b | |
| parent | powerpc/fsl: Flush the branch predictor at each kernel entry (32 bit) (diff) | |
| download | linux-e7aa61f47b23afbec41031bc47ca8d6cb6516abc.tar.xz linux-e7aa61f47b23afbec41031bc47ca8d6cb6516abc.zip | |
powerpc/fsl: Flush branch predictor when entering KVM
Switching from the guest to host is another place
where the speculative accesses can be exploited.
Flush the branch predictor when entering KVM.
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/kvm/bookehv_interrupts.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index 051af7d97327..4e5081e58409 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -75,6 +75,10 @@ PPC_LL r1, VCPU_HOST_STACK(r4) PPC_LL r2, HOST_R2(r1) +START_BTB_FLUSH_SECTION + BTB_FLUSH(r10) +END_BTB_FLUSH_SECTION + mfspr r10, SPRN_PID lwz r8, VCPU_HOST_PID(r4) PPC_LL r11, VCPU_SHARED(r4) |