On Thu, Oct 10, 2019 at 07:44:40PM +0100, Dave Martin wrote:
> Since normal execution of any non-branch instruction resets the
> PSTATE BTYPE field to 0, so do the same thing when emulating a
> trapped instruction.
>
> Branches don't trap directly, so we should never need to assign a
> non-zero value to BTYPE here.
>
> Signed-off-by: Dave Martin <Dave.Martin@xxxxxxx>
> ---
> arch/arm64/include/asm/kvm_emulate.h | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
> index d69c1ef..33957a12 100644
> --- a/arch/arm64/include/asm/kvm_emulate.h
> +++ b/arch/arm64/include/asm/kvm_emulate.h
> @@ -452,8 +452,10 @@ static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
> {
> if (vcpu_mode_is_32bit(vcpu))
> kvm_skip_instr32(vcpu, is_wide_instr);
> - else
> + else {
> *vcpu_pc(vcpu) += 4;
> + *vcpu_cpsr(vcpu) &= ~(u64)PSR_BTYPE_MASK;
> + }
Style nit: both sides of an if-else should match brace-wise. i.e. please
add braces to the other side.
As with the prior patch, the u64 cast can also go.
Otherwise, this looks right to me.
Thanks,
Mark.
