Re: [PATCH v5 1/7] KVM: guest_memfd: Plumb the number of pages and max order into .invalidate()

[Xiaoyao Li]

On 7/15/2026 7:10 AM, Sean Christopherson wrote:
> Plumb the number of pages to "invalidate", i.e. reclaim, along with the max
> order with which the pages can be mapped.  This will allow x86 to combine
> its vendor-specific implementations for conversion and reclaim, a.k.a.
> preparation and invalidation, into a single hook.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> ---
>   arch/x86/kvm/x86.c       | 4 ++--
>   include/linux/kvm_host.h | 2 +-
>   virt/kvm/guest_memfd.c   | 7 ++-----
>   3 files changed, 5 insertions(+), 8 deletions(-)
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 1f5dc685f049..a2cbf6fae118 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -10627,9 +10627,9 @@ int kvm_arch_gmem_prepare(struct kvm *kvm, gfn_t gfn, kvm_pfn_t pfn, int max_ord
>   #endif
>   
>   #ifdef CONFIG_HAVE_KVM_ARCH_GMEM_INVALIDATE
> -void kvm_arch_gmem_invalidate(kvm_pfn_t start, kvm_pfn_t end)
> +void kvm_arch_gmem_invalidate(kvm_pfn_t pfn, kvm_pfn_t nr_pages, int max_order)

why use 'kvm_pfn_t' as the type for nr_pages instead of 'unsigned long'?

(I guess just because you kept the original type for @end)