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[34.68.225.194]) by smtp.gmail.com with ESMTPSA id l7-20020a023907000000b0032e0851ea0fsm382180jaa.10.2022.05.18.21.08.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 May 2022 21:08:04 -0700 (PDT) Date: Thu, 19 May 2022 04:08:00 +0000 From: Oliver Upton To: Ricardo Koller Subject: Re: [PATCH v3 06/13] KVM: selftests: Add vm_mem_region_get_src_fd library function Message-ID: References: <20220408004120.1969099-1-ricarkol@google.com> <20220408004120.1969099-7-ricarkol@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220408004120.1969099-7-ricarkol@google.com> Cc: kvm@vger.kernel.org, maz@kernel.org, bgardon@google.com, pbonzini@redhat.com, axelrasmussen@google.com, kvmarm@lists.cs.columbia.edu X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On Thu, Apr 07, 2022 at 05:41:13PM -0700, Ricardo Koller wrote: > Add a library function to get the backing source FD of a memslot. > > Signed-off-by: Ricardo Koller Reviewed-by: Oliver Upton > --- > .../selftests/kvm/include/kvm_util_base.h | 1 + > tools/testing/selftests/kvm/lib/kvm_util.c | 23 +++++++++++++++++++ > 2 files changed, 24 insertions(+) > > diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h > index 3a69b35e37cc..c8dce12a9a52 100644 > --- a/tools/testing/selftests/kvm/include/kvm_util_base.h > +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h > @@ -163,6 +163,7 @@ int _kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg); > void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags); > void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa); > void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot); > +int vm_mem_region_get_src_fd(struct kvm_vm *vm, uint32_t memslot); > void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid); > vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min); > vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int nr_pages); > diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c > index 268ad3d75fe2..a0a9cd575fac 100644 > --- a/tools/testing/selftests/kvm/lib/kvm_util.c > +++ b/tools/testing/selftests/kvm/lib/kvm_util.c > @@ -580,6 +580,29 @@ kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start, > return ®ion->region; > } > > +/* > + * KVM Userspace Memory Get Backing Source FD > + * > + * Input Args: > + * vm - Virtual Machine > + * memslot - KVM memory slot ID > + * > + * Output Args: None > + * > + * Return: > + * Backing source file descriptor, -1 if the memslot is an anonymous region. > + * > + * Returns the backing source fd of a memslot, so tests can use it to punch > + * holes, or to setup permissions. > + */ > +int vm_mem_region_get_src_fd(struct kvm_vm *vm, uint32_t memslot) > +{ > + struct userspace_mem_region *region; > + > + region = memslot2region(vm, memslot); > + return region->fd; > +} > + > /* > * VCPU Find > * > -- > 2.35.1.1178.g4f1659d476-goog > _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm