Am 15.09.22 um 12:10 schrieb Shivam Kumar:
Exit to userspace whenever the dirty quota is exhausted (i.e. dirty count
equals/exceeds dirty quota) to request more dirty quota.
Suggested-by: Shaju Abraham <shaju.abraham@xxxxxxxxxxx>
Suggested-by: Manish Mishra <manish.mishra@xxxxxxxxxxx>
Co-developed-by: Anurag Madnawat <anurag.madnawat@xxxxxxxxxxx>
Signed-off-by: Anurag Madnawat <anurag.madnawat@xxxxxxxxxxx>
Signed-off-by: Shivam Kumar <shivam.kumar1@xxxxxxxxxxx>
---
arch/s390/kvm/kvm-s390.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index edfd4bbd0cba..2fe2933a7064 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -4343,6 +4343,15 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
goto retry;
}
+ if (kvm_check_request(KVM_REQ_DIRTY_QUOTA_EXIT, vcpu)) {
+ struct kvm_run *run = vcpu->run;
+
+ run->exit_reason = KVM_EXIT_DIRTY_QUOTA_EXHAUSTED;
+ run->dirty_quota_exit.count = vcpu->stat.generic.pages_dirtied;
+ run->dirty_quota_exit.quota = vcpu->dirty_quota;
+ return 1;
+ }
Please use
return -EREMOTE;
We use this in s390 code to indicate "we need exit to userspace" and
kvm_arch_vcpu_ioctl_run will change -EREMOTE to 0.
+
/* nothing to do, just clear the request */
kvm_clear_request(KVM_REQ_UNHALT, vcpu);
/* we left the vsie handler, nothing to do, just clear the request */
