On Fri, Mar 11, 2022 at 12:02 AM Ricardo Koller <ricarkol@xxxxxxxxxx> wrote:
>
> Add a library function to allocate a page-table physical page in a
> particular memslot. The default behavior is to create new page-table
> pages in memslot 0.
>
> Signed-off-by: Ricardo Koller <ricarkol@xxxxxxxxxx>
This is very similar to one of the patches in the NX hugepages control
series I sent out last week, I guess we both had similar needs at the
same time.
Your solution introduces way less churn though, so it's probably
better. I might use this commit or wait for it to be merged before I
send out v2 of my NX control series.
In any case,
Reviewed-by: Ben Gardon <bgardon@xxxxxxxxxx>
> ---
> tools/testing/selftests/kvm/include/kvm_util_base.h | 1 +
> tools/testing/selftests/kvm/lib/kvm_util.c | 8 +++++++-
> 2 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
> index d6acec0858c0..c8dce12a9a52 100644
> --- a/tools/testing/selftests/kvm/include/kvm_util_base.h
> +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
> @@ -307,6 +307,7 @@ vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
> vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
> vm_paddr_t paddr_min, uint32_t memslot);
> vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm);
> +vm_paddr_t vm_alloc_page_table_in_memslot(struct kvm_vm *vm, uint32_t pt_memslot);
>
> /*
> * Create a VM with reasonable defaults
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index 64ef245b73de..ae21564241c8 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -2409,9 +2409,15 @@ vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
> /* Arbitrary minimum physical address used for virtual translation tables. */
> #define KVM_GUEST_PAGE_TABLE_MIN_PADDR 0x180000
>
> +vm_paddr_t vm_alloc_page_table_in_memslot(struct kvm_vm *vm, uint32_t pt_memslot)
> +{
> + return vm_phy_page_alloc(vm, KVM_GUEST_PAGE_TABLE_MIN_PADDR,
> + pt_memslot);
> +}
> +
> vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm)
> {
> - return vm_phy_page_alloc(vm, KVM_GUEST_PAGE_TABLE_MIN_PADDR, 0);
> + return vm_alloc_page_table_in_memslot(vm, 0);
> }
>
> /*
> --
> 2.35.1.723.g4982287a31-goog
>
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