On Sun, Nov 13, 2022 at 05:05:10PM +0000, Shivam Kumar wrote:
> 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/arm64/kvm/arm.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
> index 94d33e296e10..850024982dd9 100644
> --- a/arch/arm64/kvm/arm.c
> +++ b/arch/arm64/kvm/arm.c
> @@ -746,6 +746,15 @@ static int check_vcpu_requests(struct kvm_vcpu *vcpu)
>
> if (kvm_check_request(KVM_REQ_SUSPEND, vcpu))
> return kvm_vcpu_suspend(vcpu);
> +
> + 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 0;
> + }
There is a recheck on x86 side, but not here. Any architecture specific reason?
Sorry if I missed anything.
BTW, not sure if the x86/arm code can be combined into a common function. I
don't see any architecture specific code here.
