[PATCH 3/4] RISC-V: KVM: Split huge pages during KVM_CLEAR_DIRTY_LOG

[Anup Patel]

On Wed, May 13, 2026 at 1:13 PM <wang.yechao255 at zte.com.cn> wrote:
>
> From: Wang Yechao <wang.yechao255 at zte.com.cn>
>
> Split huge pages on the range specified using KVM_CLEAR_DIRTY_LOG.
> And do not split when enabling dirty logging if
> KVM_DIRTY_LOG_INITIALLY_SET is set.
>
> Signed-off-by: Wang Yechao <wang.yechao255 at zte.com.cn>

LGTM.

Reviewed-by: Anup Patel <anup at brainfault.org>

Thanks,
Anup


> ---
>  arch/riscv/kvm/mmu.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c
> index 14c558ee5f15..2cdea3e3ed4b 100644
> --- a/arch/riscv/kvm/mmu.c
> +++ b/arch/riscv/kvm/mmu.c
> @@ -147,6 +147,9 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
>         kvm_riscv_gstage_init(&gstage, kvm);
>
>         kvm_riscv_gstage_wp_range(&gstage, start, end);
> +
> +       if (kvm_dirty_log_manual_protect_and_init_set(kvm))
> +               kvm_riscv_split_huge_pages(&gstage, start, end, true);
>  }
>
>  void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
> --
> 2.27.0