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SubjectRe: [PATCH v4 3/6] KVM: MMU: introduce kvm_clear_all_lpage_info
On Sat, 27 Apr 2013 11:13:19 +0800
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> wrote:

> This function is used to reset the large page info of all guest pages
> which will be used in later patch
>
> Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
> ---
> arch/x86/kvm/x86.c | 25 +++++++++++++++++++++++++
> arch/x86/kvm/x86.h | 2 ++
> 2 files changed, 27 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 52b4e97..8e4494c 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -6951,6 +6951,31 @@ static void memslot_set_lpage_disallowed(struct kvm_memory_slot *slot,
> }
> }
>
> +static void clear_memslot_lpage_info(struct kvm_memory_slot *slot)
> +{
> + int i;
> +
> + for (i = 1; i < KVM_NR_PAGE_SIZES; ++i) {
> + int lpages;
> + int level = i + 1;
> +
> + lpages = gfn_to_index(slot->base_gfn + slot->npages - 1,
> + slot->base_gfn, level) + 1;
> +
> + memset(slot->arch.lpage_info[i - 1], 0,
> + sizeof(*slot->arch.lpage_info[i - 1]));
> + memslot_set_lpage_disallowed(slot, slot->npages, i, lpages);

This does something other than clearing.
Any better name?

Takuya


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