linux-kernel - Re: [RFC PATCH v5 24/29] KVM: selftests: Expose _vm_vaddr

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Date: Mon, 4 Mar 2024 17:55:46 +0800
From: Binbin Wu <binbin.wu@...ux.intel.com>
To: Sagi Shahar <sagis@...gle.com>
Cc: linux-kselftest@...r.kernel.org, Ackerley Tng <ackerleytng@...gle.com>,
 Ryan Afranji <afranji@...gle.com>, Erdem Aktas <erdemaktas@...gle.com>,
 Isaku Yamahata <isaku.yamahata@...el.com>,
 Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini
 <pbonzini@...hat.com>, Shuah Khan <shuah@...nel.org>,
 Peter Gonda <pgonda@...gle.com>, Haibo Xu <haibo1.xu@...el.com>,
 Chao Peng <chao.p.peng@...ux.intel.com>,
 Vishal Annapurve <vannapurve@...gle.com>, Roger Wang <runanwang@...gle.com>,
 Vipin Sharma <vipinsh@...gle.com>, jmattson@...gle.com, dmatlack@...gle.com,
 linux-kernel@...r.kernel.org, kvm@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC PATCH v5 24/29] KVM: selftests: Expose _vm_vaddr_alloc



On 12/13/2023 4:46 AM, Sagi Shahar wrote:
> From: Ackerley Tng <ackerleytng@...gle.com>
>
> vm_vaddr_alloc always allocates memory in memslot 0. This allows users
> of this function to choose which memslot to allocate virtual memory
> in.

Nit: The patch exposes ____vm_vaddr_alloc() instead of _vm_vaddr_alloc().

> Signed-off-by: Ackerley Tng <ackerleytng@...gle.com>
> Signed-off-by: Ryan Afranji <afranji@...gle.com>
> Signed-off-by: Sagi Shahar <sagis@...gle.com>
> ---
>   tools/testing/selftests/kvm/include/kvm_util_base.h | 3 +++
>   tools/testing/selftests/kvm/lib/kvm_util.c          | 6 +++---
>   2 files changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
> index efd7ae8abb20..5dbebf5cfd07 100644
> --- a/tools/testing/selftests/kvm/include/kvm_util_base.h
> +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
> @@ -561,6 +561,9 @@ void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot);
>   struct kvm_vcpu *__vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id);
>   void vm_populate_vaddr_bitmap(struct kvm_vm *vm);
>   vm_vaddr_t vm_vaddr_unused_gap(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min);
> +vm_vaddr_t ____vm_vaddr_alloc(struct kvm_vm *vm, size_t sz,
> +			      vm_vaddr_t vaddr_min, vm_paddr_t paddr_min,
> +			      uint32_t data_memslot, bool encrypt);
>   vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min);
>   vm_vaddr_t __vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min,
>   			    enum kvm_mem_region_type type);
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index 28780fa1f0f2..d024abc5379c 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -1410,9 +1410,9 @@ vm_vaddr_t vm_vaddr_unused_gap(struct kvm_vm *vm, size_t sz,
>    * a unique set of pages, with the minimum real allocation being at least
>    * a page.
>    */
> -static vm_vaddr_t ____vm_vaddr_alloc(struct kvm_vm *vm, size_t sz,
> -				     vm_vaddr_t vaddr_min, vm_paddr_t paddr_min,
> -				     uint32_t data_memslot, bool encrypt)
> +vm_vaddr_t ____vm_vaddr_alloc(struct kvm_vm *vm, size_t sz,
> +			      vm_vaddr_t vaddr_min, vm_paddr_t paddr_min,
> +			      uint32_t data_memslot, bool encrypt)
>   {
>   	uint64_t pages = (sz >> vm->page_shift) + ((sz % vm->page_size) != 0);
>