[06/19] KVM: selftests: Add helpers to allocate N pages of virtual memory

Message ID	20210622200529.3650424-7-seanjc@google.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <kvm-owner@kernel.org> Reply-To: Sean Christopherson <seanjc@google.com> Date: Tue, 22 Jun 2021 13:05:16 -0700 In-Reply-To: <20210622200529.3650424-1-seanjc@google.com> Message-Id: <20210622200529.3650424-7-seanjc@google.com> Mime-Version: 1.0 References: <20210622200529.3650424-1-seanjc@google.com> Subject: [PATCH 06/19] KVM: selftests: Add helpers to allocate N pages of virtual memory From: Sean Christopherson <seanjc@google.com> To: Paolo Bonzini <pbonzini@redhat.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Janosch Frank <frankja@linux.ibm.com> Cc: David Hildenbrand <david@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Claudio Imbrenda <imbrenda@linux.ibm.com>, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Peter Xu <peterx@redhat.com>, Sean Christopherson <seanjc@google.com>, Peter Shier <pshier@google.com> Content-Type: text/plain; charset="UTF-8" Precedence: bulk
Series	KVM: selftests: Add x86 mmu_role test and cleanups \| expand [00/19] KVM: selftests: Add x86 mmu_role test and cleanups [01/19] KVM: selftests: Remove errant asm/barrier.h include to fix arm64 build [02/19] KVM: selftests: Zero out the correct page in the Hyper-V features test [03/19] KVM: selftests: Unconditionally use memslot 0 when loading elf binary [04/19] KVM: selftests: Unconditionally use memslot 0 for x86's GDT/TSS setup [05/19] KVM: selftests: Use "standard" min virtual address for Hyper-V pages [06/19] KVM: selftests: Add helpers to allocate N pages of virtual memory [07/19] KVM: selftests: Lower the min virtual address for misc page allocations [08/19] KVM: selftests: Use alloc_page helper for x86-64's GDT/ITD/TSS allocations [09/19] KVM: selftests: Use alloc page helper for xAPIC IPI test [10/19] KVM: selftests: Use "standard" min virtual address for CPUID test alloc [11/19] KVM: selftest: Unconditionally use memslot 0 for vaddr allocations [12/19] KVM: selftests: Unconditionally use memslot '0' for page table allocations [13/19] KVM: selftests: Unconditionally allocate EPT tables in memslot 0 [14/19] KVM: selftests: Add wrapper to allocate page table page [15/19] KVM: selftests: Rename x86's page table "address" to "pfn" [16/19] KVM: selfests: Add PTE helper for x86-64 in preparation for hugepages [17/19] KVM: selftests: Genericize upper level page table entry struct [18/19] KVM: selftests: Add hugepage support for x86-64 [19/19] KVM: sefltests: Add x86-64 test to verify MMU reacts to CPUID updates

diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 59608b17707d..70385bf25446 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -142,6 +142,9 @@ void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot); 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, uint32_t data_memslot, uint32_t pgd_memslot); +vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int nr_pages); +vm_vaddr_t vm_vaddr_alloc_page(struct kvm_vm *vm); + void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, unsigned int npages, uint32_t pgd_memslot); void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa); diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 15a8527b15db..c45e8c492627 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -1280,6 +1280,44 @@ vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min, return vaddr_start; } +/* + * VM Virtual Address Allocate Pages + * + * Input Args: + * vm - Virtual Machine + * + * Output Args: None + * + * Return: + * Starting guest virtual address + * + * Allocates at least N system pages worth of bytes within the virtual address + * space of the vm. + */ +vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int nr_pages) +{ + return vm_vaddr_alloc(vm, nr_pages * getpagesize(), 0x10000, 0, 0); +} + +/* + * VM Virtual Address Allocate Page + * + * Input Args: + * vm - Virtual Machine + * + * Output Args: None + * + * Return: + * Starting guest virtual address + * + * Allocates at least one system page worth of bytes within the virtual address + * space of the vm. + */ +vm_vaddr_t vm_vaddr_alloc_page(struct kvm_vm *vm) +{ + return vm_vaddr_alloc_pages(vm, 1); +} + /* * Map a range of VM virtual address to the VM's physical address * diff --git a/tools/testing/selftests/kvm/lib/x86_64/svm.c b/tools/testing/selftests/kvm/lib/x86_64/svm.c index 827fe6028dd4..2ac98d70d02b 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/svm.c +++ b/tools/testing/selftests/kvm/lib/x86_64/svm.c @@ -30,17 +30,14 @@ u64 rflags; struct svm_test_data * vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva) { - vm_vaddr_t svm_gva = vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); + vm_vaddr_t svm_gva = vm_vaddr_alloc_page(vm); struct svm_test_data *svm = addr_gva2hva(vm, svm_gva); - svm->vmcb = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); + svm->vmcb = (void *)vm_vaddr_alloc_page(vm); svm->vmcb_hva = addr_gva2hva(vm, (uintptr_t)svm->vmcb); svm->vmcb_gpa = addr_gva2gpa(vm, (uintptr_t)svm->vmcb); - svm->save_area = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); + svm->save_area = (void *)vm_vaddr_alloc_page(vm); svm->save_area_hva = addr_gva2hva(vm, (uintptr_t)svm->save_area); svm->save_area_gpa = addr_gva2gpa(vm, (uintptr_t)svm->save_area); diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c index 2448b30e8efa..d568d8cfd44d 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c +++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c @@ -77,50 +77,48 @@ int vcpu_enable_evmcs(struct kvm_vm *vm, int vcpu_id) struct vmx_pages * vcpu_alloc_vmx(struct kvm_vm *vm, vm_vaddr_t *p_vmx_gva) { - vm_vaddr_t vmx_gva = vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vm_vaddr_t vmx_gva = vm_vaddr_alloc_page(vm); struct vmx_pages *vmx = addr_gva2hva(vm, vmx_gva); /* Setup of a region of guest memory for the vmxon region. */ - vmx->vmxon = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vmx->vmxon = (void *)vm_vaddr_alloc_page(vm); vmx->vmxon_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmxon); vmx->vmxon_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmxon); /* Setup of a region of guest memory for a vmcs. */ - vmx->vmcs = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vmx->vmcs = (void *)vm_vaddr_alloc_page(vm); vmx->vmcs_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmcs); vmx->vmcs_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmcs); /* Setup of a region of guest memory for the MSR bitmap. */ - vmx->msr = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vmx->msr = (void *)vm_vaddr_alloc_page(vm); vmx->msr_hva = addr_gva2hva(vm, (uintptr_t)vmx->msr); vmx->msr_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->msr); memset(vmx->msr_hva, 0, getpagesize()); /* Setup of a region of guest memory for the shadow VMCS. */ - vmx->shadow_vmcs = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vmx->shadow_vmcs = (void *)vm_vaddr_alloc_page(vm); vmx->shadow_vmcs_hva = addr_gva2hva(vm, (uintptr_t)vmx->shadow_vmcs); vmx->shadow_vmcs_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->shadow_vmcs); /* Setup of a region of guest memory for the VMREAD and VMWRITE bitmaps. */ - vmx->vmread = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vmx->vmread = (void *)vm_vaddr_alloc_page(vm); vmx->vmread_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmread); vmx->vmread_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmread); memset(vmx->vmread_hva, 0, getpagesize()); - vmx->vmwrite = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vmx->vmwrite = (void *)vm_vaddr_alloc_page(vm); vmx->vmwrite_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmwrite); vmx->vmwrite_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmwrite); memset(vmx->vmwrite_hva, 0, getpagesize()); /* Setup of a region of guest memory for the VP Assist page. */ - vmx->vp_assist = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); + vmx->vp_assist = (void *)vm_vaddr_alloc_page(vm); vmx->vp_assist_hva = addr_gva2hva(vm, (uintptr_t)vmx->vp_assist); vmx->vp_assist_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vp_assist); /* Setup of a region of guest memory for the enlightened VMCS. */ - vmx->enlightened_vmcs = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); + vmx->enlightened_vmcs = (void *)vm_vaddr_alloc_page(vm); vmx->enlightened_vmcs_hva = addr_gva2hva(vm, (uintptr_t)vmx->enlightened_vmcs); vmx->enlightened_vmcs_gpa = @@ -538,7 +536,7 @@ void nested_map_memslot(struct vmx_pages *vmx, struct kvm_vm *vm, void prepare_eptp(struct vmx_pages *vmx, struct kvm_vm *vm, uint32_t eptp_memslot) { - vmx->eptp = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + vmx->eptp = (void *)vm_vaddr_alloc_page(vm); vmx->eptp_hva = addr_gva2hva(vm, (uintptr_t)vmx->eptp); vmx->eptp_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->eptp); } @@ -546,8 +544,7 @@ void prepare_eptp(struct vmx_pages *vmx, struct kvm_vm *vm, void prepare_virtualize_apic_accesses(struct vmx_pages *vmx, struct kvm_vm *vm, uint32_t eptp_memslot) { - vmx->apic_access = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); + vmx->apic_access = (void *)vm_vaddr_alloc_page(vm); vmx->apic_access_hva = addr_gva2hva(vm, (uintptr_t)vmx->apic_access); vmx->apic_access_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->apic_access); } diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_clock.c b/tools/testing/selftests/kvm/x86_64/hyperv_clock.c index 489625acc9cf..bab10ae787b6 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_clock.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_clock.c @@ -214,7 +214,7 @@ int main(void) vcpu_set_hv_cpuid(vm, VCPU_ID); - tsc_page_gva = vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + tsc_page_gva = vm_vaddr_alloc_page(vm); memset(addr_gpa2hva(vm, tsc_page_gva), 0x0, getpagesize()); TEST_ASSERT((addr_gva2gpa(vm, tsc_page_gva) & (getpagesize() - 1)) == 0, "TSC page has to be page aligned\n"); diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_features.c b/tools/testing/selftests/kvm/x86_64/hyperv_features.c index ad7ee06fa71e..42bd658f52a8 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_features.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_features.c @@ -604,7 +604,7 @@ int main(void) /* Test MSRs */ vm = vm_create_default(VCPU_ID, 0, guest_msr); - msr_gva = vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + msr_gva = vm_vaddr_alloc_page(vm); memset(addr_gva2hva(vm, msr_gva), 0x0, getpagesize()); vcpu_args_set(vm, VCPU_ID, 1, msr_gva); vcpu_enable_cap(vm, VCPU_ID, &cap); @@ -626,10 +626,10 @@ int main(void) vm = vm_create_default(VCPU_ID, 0, guest_hcall); /* Hypercall input/output */ - hcall_page = vm_vaddr_alloc(vm, 2 * getpagesize(), 0x10000, 0, 0); + hcall_page = vm_vaddr_alloc_pages(vm, 2); memset(addr_gva2hva(vm, hcall_page), 0x0, 2 * getpagesize()); - hcall_params = vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); + hcall_params = vm_vaddr_alloc_page(vm); memset(addr_gva2hva(vm, hcall_params), 0x0, getpagesize()); vcpu_args_set(vm, VCPU_ID, 2, addr_gva2gpa(vm, hcall_page), hcall_params);

[06/19] KVM: selftests: Add helpers to allocate N pages of virtual memory

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Patch