On 07/05/2018 12:18 PM, Janosch Frank wrote:
> kvm_clear_guest also does the dirty tracking for us, which we want to
> have.
>
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> ---
> arch/s390/kvm/priv.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
> index eb0eb60c7be6..c4da375553e8 100644
> --- a/arch/s390/kvm/priv.c
> +++ b/arch/s390/kvm/priv.c
> @@ -956,7 +956,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
> return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
>
> if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
> - if (clear_user((void __user *)useraddr, PAGE_SIZE))
we still need useraddr for the keyop below, so it seems we cannot get rid of it.
Makes sense.
Acked-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> + if (kvm_clear_guest(vcpu->kvm, start, PAGE_SIZE))
> return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
> }
>
