On Thu, Feb 15, 2018 at 10:03:00PM +0100, Christoffer Dall wrote:

We have numerous checks around that checks if the HCR_EL2 has the RW bit
set to figure out if we're running an AArch64 or AArch32 VM.  In some
cases, directly checking the RW bit (given its unintuitive name), is a
bit confusing, and that's not going to improve as we move logic around
for the following patches that optimize KVM on AArch64 hosts with VHE.

Therefore, introduce a helper, vcpu_el1_is_32bit, and replace existing
direct checks of HCR_EL2.RW with the helper.

Reviewed-by: Julien Grall <redacted>
Reviewed-by: Julien Thierry <redacted>
Signed-off-by: Christoffer Dall <redacted>
---

Notes:
    Changes since v2:
     - New patch
    
    Changes since v1:
     - Reworded comments as suggested by Drew

 arch/arm64/include/asm/kvm_emulate.h |  7 ++++++-
 arch/arm64/kvm/hyp/switch.c          | 11 +++++------
 arch/arm64/kvm/hyp/sysreg-sr.c       |  5 +++--
 arch/arm64/kvm/inject_fault.c        |  6 +++---
 4 files changed, 17 insertions(+), 12 deletions(-)

Reviewed-by: Andrew Jones <redacted>