On 12.01.2018 13:07, Christoffer Dall wrote:

There is no need to enable/disable traps to FP registers on every switch
to/from the VM, because the host kernel does not use this resource
without calling vcpu_put.  We can therefore move things around enough
that we still always write FPEXC32_EL2 before programming CPTR_EL2 but
only program these during vcpu load/put.

Signed-off-by: Christoffer Dall <redacted>
---
  arch/arm64/include/asm/kvm_hyp.h |  6 +++++
  arch/arm64/kvm/hyp/switch.c      | 51 +++++++++++++++++++++++++++++-----------
  arch/arm64/kvm/hyp/sysreg-sr.c   | 12 ++++++++--
  3 files changed, 53 insertions(+), 16 deletions(-)

[...]

  
-static void __hyp_text __deactivate_traps_nvhe(void)
-{
+static void __hyp_text __deactivate_traps_nvhe(void) {

Nit: unrelated change.

Thanks,
Tomasz