[27/34] KVM: selftests: Introduce VM "shape" to allow tests to specify the VM type

Message ID	20231105163040.14904-28-pbonzini@redhat.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org> From: Paolo Bonzini <pbonzini@redhat.com> To: Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>, Oliver Upton <oliver.upton@linux.dev>, Huacai Chen <chenhuacai@kernel.org>, Michael Ellerman <mpe@ellerman.id.au>, Anup Patel <anup@brainfault.org>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Sean Christopherson <seanjc@google.com>, Alexander Viro <viro@zeniv.linux.org.uk>, Christian Brauner <brauner@kernel.org>, "Matthew Wilcox (Oracle)" <willy@infradead.org>, Andrew Morton <akpm@linux-foundation.org> Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Xiaoyao Li <xiaoyao.li@intel.com>, Xu Yilun <yilun.xu@intel.com>, Chao Peng <chao.p.peng@linux.intel.com>, Fuad Tabba <tabba@google.com>, Jarkko Sakkinen <jarkko@kernel.org>, Anish Moorthy <amoorthy@google.com>, David Matlack <dmatlack@google.com>, Yu Zhang <yu.c.zhang@linux.intel.com>, Isaku Yamahata <isaku.yamahata@intel.com>, =?utf-8?q?Micka=C3=ABl_Sala?= =?utf-8?q?=C3=BCn?= <mic@digikod.net>, Vlastimil Babka <vbabka@suse.cz>, Vishal Annapurve <vannapurve@google.com>, Ackerley Tng <ackerleytng@google.com>, Maciej Szmigiero <mail@maciej.szmigiero.name>, David Hildenbrand <david@redhat.com>, Quentin Perret <qperret@google.com>, Michael Roth <michael.roth@amd.com>, Wang <wei.w.wang@intel.com>, Liam Merwick <liam.merwick@oracle.com>, Isaku Yamahata <isaku.yamahata@gmail.com>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Subject: [PATCH 27/34] KVM: selftests: Introduce VM "shape" to allow tests to specify the VM type Date: Sun, 5 Nov 2023 17:30:30 +0100 Message-ID: <20231105163040.14904-28-pbonzini@redhat.com> In-Reply-To: <20231105163040.14904-1-pbonzini@redhat.com> References: <20231105163040.14904-1-pbonzini@redhat.com> MIME-Version: 1.0 Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
Series	KVM: guest_memfd() and per-page attributes \| expand [v14,00/34] KVM: guest_memfd() and per-page attributes [01/34] KVM: Tweak kvm_hva_range and hva_handler_t to allow reusing for gfn ranges [02/34] KVM: Assert that mmu_invalidate_in_progress never goes negative [03/34] KVM: Use gfn instead of hva for mmu_notifier_retry [04/34] KVM: WARN if there are dangling MMU invalidations at VM destruction [05/34] KVM: PPC: Drop dead code related to KVM_ARCH_WANT_MMU_NOTIFIER [06/34] KVM: PPC: Return '1' unconditionally for KVM_CAP_SYNC_MMU [07/34] KVM: Convert KVM_ARCH_WANT_MMU_NOTIFIER to CONFIG_KVM_GENERIC_MMU_NOTIFIER [08/34] KVM: Introduce KVM_SET_USER_MEMORY_REGION2 [09/34] KVM: Add KVM_EXIT_MEMORY_FAULT exit to report faults to userspace [10/34] KVM: Add a dedicated mmu_notifier flag for reclaiming freed memory [11/34] KVM: Drop .on_unlock() mmu_notifier hook [12/34] KVM: Introduce per-page memory attributes [13/34] mm: Add AS_UNMOVABLE to mark mapping as completely unmovable [14/34] fs: Rename anon_inode_getfile_secure() and anon_inode_getfd_secure() [15/34] KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory [16/34] KVM: x86: "Reset" vcpu->run->exit_reason early in KVM_RUN [17/34] KVM: x86: Disallow hugepages when memory attributes are mixed [18/34] KVM: x86/mmu: Handle page fault for private memory [19/34] KVM: Drop superfluous __KVM_VCPU_MULTIPLE_ADDRESS_SPACE macro [20/34] KVM: Allow arch code to track number of memslot address spaces per VM [21/34] KVM: x86: Add support for "protected VMs" that can utilize private memory [22/34] KVM: selftests: Drop unused kvm_userspace_memory_region_find() helper [23/34] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2 [24/34] KVM: selftests: Add support for creating private memslots [25/34] KVM: selftests: Add helpers to convert guest memory b/w private and shared [26/34] KVM: selftests: Add helpers to do KVM_HC_MAP_GPA_RANGE hypercalls (x86) [27/34] KVM: selftests: Introduce VM "shape" to allow tests to specify the VM type [28/34] KVM: selftests: Add GUEST_SYNC[1-6] macros for synchronizing more data [29/34] KVM: selftests: Add x86-only selftest for private memory conversions [30/34] KVM: selftests: Add KVM_SET_USER_MEMORY_REGION2 helper [31/34] KVM: selftests: Expand set_memory_region_test to validate guest_memfd() [32/34] KVM: selftests: Add basic selftest for guest_memfd() [33/34] KVM: selftests: Test KVM exit behavior for private memory/access [34/34] KVM: selftests: Add a memory region subtest to validate invalid flags [35/34] KVM: Prepare for handling only shared mappings in mmu_notifier events [36/34] KVM: Add transparent hugepage support for dedicated guest memory

On Sun, Nov 5, 2023 at 4:34 PM Paolo Bonzini <pbonzini@redhat.com> wrote: > > From: Sean Christopherson <seanjc@google.com> > > Add a "vm_shape" structure to encapsulate the selftests-defined "mode", > along with the KVM-defined "type" for use when creating a new VM. "mode" > tracks physical and virtual address properties, as well as the preferred > backing memory type, while "type" corresponds to the VM type. > > Taking the VM type will allow adding tests for KVM_CREATE_GUEST_MEMFD, > a.k.a. guest private memory, without needing an entirely separate set of > helpers. Guest private memory is effectively usable only by confidential > VM types, and it's expected that x86 will double down and require unique > VM types for TDX and SNP guests. > > Signed-off-by: Sean Christopherson <seanjc@google.com> > Message-Id: <20231027182217.3615211-30-seanjc@google.com> > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > --- nit: as in a prior selftest commit messages, references in the commit message to guest _private_ memory. Should these be changed to just guest memory? Reviewed-by: Fuad Tabba <tabba@google.com> Tested-by: Fuad Tabba <tabba@google.com> Cheers, /fuad > tools/testing/selftests/kvm/dirty_log_test.c | 2 +- > .../selftests/kvm/include/kvm_util_base.h | 54 +++++++++++++++---- > .../selftests/kvm/kvm_page_table_test.c | 2 +- > tools/testing/selftests/kvm/lib/kvm_util.c | 43 +++++++-------- > tools/testing/selftests/kvm/lib/memstress.c | 3 +- > .../kvm/x86_64/ucna_injection_test.c | 2 +- > 6 files changed, 72 insertions(+), 34 deletions(-) > > diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c > index 936f3a8d1b83..6cbecf499767 100644 > --- a/tools/testing/selftests/kvm/dirty_log_test.c > +++ b/tools/testing/selftests/kvm/dirty_log_test.c > @@ -699,7 +699,7 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, struct kvm_vcpu **vcpu, > > pr_info("Testing guest mode: %s\n", vm_guest_mode_string(mode)); > > - vm = __vm_create(mode, 1, extra_mem_pages); > + vm = __vm_create(VM_SHAPE(mode), 1, extra_mem_pages); > > log_mode_create_vm_done(vm); > *vcpu = vm_vcpu_add(vm, 0, guest_code); > diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h > index 1441fca6c273..157508c071f3 100644 > --- a/tools/testing/selftests/kvm/include/kvm_util_base.h > +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h > @@ -188,6 +188,23 @@ enum vm_guest_mode { > NUM_VM_MODES, > }; > > +struct vm_shape { > + enum vm_guest_mode mode; > + unsigned int type; > +}; > + > +#define VM_TYPE_DEFAULT 0 > + > +#define VM_SHAPE(__mode) \ > +({ \ > + struct vm_shape shape = { \ > + .mode = (__mode), \ > + .type = VM_TYPE_DEFAULT \ > + }; \ > + \ > + shape; \ > +}) > + > #if defined(__aarch64__) > > extern enum vm_guest_mode vm_mode_default; > @@ -220,6 +237,8 @@ extern enum vm_guest_mode vm_mode_default; > > #endif > > +#define VM_SHAPE_DEFAULT VM_SHAPE(VM_MODE_DEFAULT) > + > #define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT) > #define PTES_PER_MIN_PAGE ptes_per_page(MIN_PAGE_SIZE) > > @@ -784,21 +803,21 @@ vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm); > * __vm_create() does NOT create vCPUs, @nr_runnable_vcpus is used purely to > * calculate the amount of memory needed for per-vCPU data, e.g. stacks. > */ > -struct kvm_vm *____vm_create(enum vm_guest_mode mode); > -struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint32_t nr_runnable_vcpus, > +struct kvm_vm *____vm_create(struct vm_shape shape); > +struct kvm_vm *__vm_create(struct vm_shape shape, uint32_t nr_runnable_vcpus, > uint64_t nr_extra_pages); > > static inline struct kvm_vm *vm_create_barebones(void) > { > - return ____vm_create(VM_MODE_DEFAULT); > + return ____vm_create(VM_SHAPE_DEFAULT); > } > > static inline struct kvm_vm *vm_create(uint32_t nr_runnable_vcpus) > { > - return __vm_create(VM_MODE_DEFAULT, nr_runnable_vcpus, 0); > + return __vm_create(VM_SHAPE_DEFAULT, nr_runnable_vcpus, 0); > } > > -struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus, > +struct kvm_vm *__vm_create_with_vcpus(struct vm_shape shape, uint32_t nr_vcpus, > uint64_t extra_mem_pages, > void *guest_code, struct kvm_vcpu *vcpus[]); > > @@ -806,17 +825,27 @@ static inline struct kvm_vm *vm_create_with_vcpus(uint32_t nr_vcpus, > void *guest_code, > struct kvm_vcpu *vcpus[]) > { > - return __vm_create_with_vcpus(VM_MODE_DEFAULT, nr_vcpus, 0, > + return __vm_create_with_vcpus(VM_SHAPE_DEFAULT, nr_vcpus, 0, > guest_code, vcpus); > } > > + > +struct kvm_vm *__vm_create_shape_with_one_vcpu(struct vm_shape shape, > + struct kvm_vcpu **vcpu, > + uint64_t extra_mem_pages, > + void *guest_code); > + > /* > * Create a VM with a single vCPU with reasonable defaults and @extra_mem_pages > * additional pages of guest memory. Returns the VM and vCPU (via out param). > */ > -struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, > - uint64_t extra_mem_pages, > - void *guest_code); > +static inline struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, > + uint64_t extra_mem_pages, > + void *guest_code) > +{ > + return __vm_create_shape_with_one_vcpu(VM_SHAPE_DEFAULT, vcpu, > + extra_mem_pages, guest_code); > +} > > static inline struct kvm_vm *vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, > void *guest_code) > @@ -824,6 +853,13 @@ static inline struct kvm_vm *vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, > return __vm_create_with_one_vcpu(vcpu, 0, guest_code); > } > > +static inline struct kvm_vm *vm_create_shape_with_one_vcpu(struct vm_shape shape, > + struct kvm_vcpu **vcpu, > + void *guest_code) > +{ > + return __vm_create_shape_with_one_vcpu(shape, vcpu, 0, guest_code); > +} > + > struct kvm_vcpu *vm_recreate_with_one_vcpu(struct kvm_vm *vm); > > void kvm_pin_this_task_to_pcpu(uint32_t pcpu); > diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c > index 69f26d80c821..e37dc9c21888 100644 > --- a/tools/testing/selftests/kvm/kvm_page_table_test.c > +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c > @@ -254,7 +254,7 @@ static struct kvm_vm *pre_init_before_test(enum vm_guest_mode mode, void *arg) > > /* Create a VM with enough guest pages */ > guest_num_pages = test_mem_size / guest_page_size; > - vm = __vm_create_with_vcpus(mode, nr_vcpus, guest_num_pages, > + vm = __vm_create_with_vcpus(VM_SHAPE(mode), nr_vcpus, guest_num_pages, > guest_code, test_args.vcpus); > > /* Align down GPA of the testing memslot */ > diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c > index 95a553400ea9..1c74310f1d44 100644 > --- a/tools/testing/selftests/kvm/lib/kvm_util.c > +++ b/tools/testing/selftests/kvm/lib/kvm_util.c > @@ -209,7 +209,7 @@ __weak void vm_vaddr_populate_bitmap(struct kvm_vm *vm) > (1ULL << (vm->va_bits - 1)) >> vm->page_shift); > } > > -struct kvm_vm *____vm_create(enum vm_guest_mode mode) > +struct kvm_vm *____vm_create(struct vm_shape shape) > { > struct kvm_vm *vm; > > @@ -221,13 +221,13 @@ struct kvm_vm *____vm_create(enum vm_guest_mode mode) > vm->regions.hva_tree = RB_ROOT; > hash_init(vm->regions.slot_hash); > > - vm->mode = mode; > - vm->type = 0; > + vm->mode = shape.mode; > + vm->type = shape.type; > > - vm->pa_bits = vm_guest_mode_params[mode].pa_bits; > - vm->va_bits = vm_guest_mode_params[mode].va_bits; > - vm->page_size = vm_guest_mode_params[mode].page_size; > - vm->page_shift = vm_guest_mode_params[mode].page_shift; > + vm->pa_bits = vm_guest_mode_params[vm->mode].pa_bits; > + vm->va_bits = vm_guest_mode_params[vm->mode].va_bits; > + vm->page_size = vm_guest_mode_params[vm->mode].page_size; > + vm->page_shift = vm_guest_mode_params[vm->mode].page_shift; > > /* Setup mode specific traits. */ > switch (vm->mode) { > @@ -265,7 +265,7 @@ struct kvm_vm *____vm_create(enum vm_guest_mode mode) > /* > * Ignore KVM support for 5-level paging (vm->va_bits == 57), > * it doesn't take effect unless a CR4.LA57 is set, which it > - * isn't for this VM_MODE. > + * isn't for this mode (48-bit virtual address space). > */ > TEST_ASSERT(vm->va_bits == 48 || vm->va_bits == 57, > "Linear address width (%d bits) not supported", > @@ -285,10 +285,11 @@ struct kvm_vm *____vm_create(enum vm_guest_mode mode) > vm->pgtable_levels = 5; > break; > default: > - TEST_FAIL("Unknown guest mode, mode: 0x%x", mode); > + TEST_FAIL("Unknown guest mode: 0x%x", vm->mode); > } > > #ifdef __aarch64__ > + TEST_ASSERT(!vm->type, "ARM doesn't support test-provided types"); > if (vm->pa_bits != 40) > vm->type = KVM_VM_TYPE_ARM_IPA_SIZE(vm->pa_bits); > #endif > @@ -347,19 +348,19 @@ static uint64_t vm_nr_pages_required(enum vm_guest_mode mode, > return vm_adjust_num_guest_pages(mode, nr_pages); > } > > -struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint32_t nr_runnable_vcpus, > +struct kvm_vm *__vm_create(struct vm_shape shape, uint32_t nr_runnable_vcpus, > uint64_t nr_extra_pages) > { > - uint64_t nr_pages = vm_nr_pages_required(mode, nr_runnable_vcpus, > + uint64_t nr_pages = vm_nr_pages_required(shape.mode, nr_runnable_vcpus, > nr_extra_pages); > struct userspace_mem_region *slot0; > struct kvm_vm *vm; > int i; > > - pr_debug("%s: mode='%s' pages='%ld'\n", __func__, > - vm_guest_mode_string(mode), nr_pages); > + pr_debug("%s: mode='%s' type='%d', pages='%ld'\n", __func__, > + vm_guest_mode_string(shape.mode), shape.type, nr_pages); > > - vm = ____vm_create(mode); > + vm = ____vm_create(shape); > > vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, 0); > for (i = 0; i < NR_MEM_REGIONS; i++) > @@ -400,7 +401,7 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint32_t nr_runnable_vcpus, > * extra_mem_pages is only used to calculate the maximum page table size, > * no real memory allocation for non-slot0 memory in this function. > */ > -struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus, > +struct kvm_vm *__vm_create_with_vcpus(struct vm_shape shape, uint32_t nr_vcpus, > uint64_t extra_mem_pages, > void *guest_code, struct kvm_vcpu *vcpus[]) > { > @@ -409,7 +410,7 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus > > TEST_ASSERT(!nr_vcpus || vcpus, "Must provide vCPU array"); > > - vm = __vm_create(mode, nr_vcpus, extra_mem_pages); > + vm = __vm_create(shape, nr_vcpus, extra_mem_pages); > > for (i = 0; i < nr_vcpus; ++i) > vcpus[i] = vm_vcpu_add(vm, i, guest_code); > @@ -417,15 +418,15 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus > return vm; > } > > -struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, > - uint64_t extra_mem_pages, > - void *guest_code) > +struct kvm_vm *__vm_create_shape_with_one_vcpu(struct vm_shape shape, > + struct kvm_vcpu **vcpu, > + uint64_t extra_mem_pages, > + void *guest_code) > { > struct kvm_vcpu *vcpus[1]; > struct kvm_vm *vm; > > - vm = __vm_create_with_vcpus(VM_MODE_DEFAULT, 1, extra_mem_pages, > - guest_code, vcpus); > + vm = __vm_create_with_vcpus(shape, 1, extra_mem_pages, guest_code, vcpus); > > *vcpu = vcpus[0]; > return vm; > diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c > index df457452d146..d05487e5a371 100644 > --- a/tools/testing/selftests/kvm/lib/memstress.c > +++ b/tools/testing/selftests/kvm/lib/memstress.c > @@ -168,7 +168,8 @@ struct kvm_vm *memstress_create_vm(enum vm_guest_mode mode, int nr_vcpus, > * The memory is also added to memslot 0, but that's a benign side > * effect as KVM allows aliasing HVAs in meslots. > */ > - vm = __vm_create_with_vcpus(mode, nr_vcpus, slot0_pages + guest_num_pages, > + vm = __vm_create_with_vcpus(VM_SHAPE(mode), nr_vcpus, > + slot0_pages + guest_num_pages, > memstress_guest_code, vcpus); > > args->vm = vm; > diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c > index 85f34ca7e49e..0ed32ec903d0 100644 > --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c > +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c > @@ -271,7 +271,7 @@ int main(int argc, char *argv[]) > > kvm_check_cap(KVM_CAP_MCE); > > - vm = __vm_create(VM_MODE_DEFAULT, 3, 0); > + vm = __vm_create(VM_SHAPE_DEFAULT, 3, 0); > > kvm_ioctl(vm->kvm_fd, KVM_X86_GET_MCE_CAP_SUPPORTED, > &supported_mcg_caps); > -- > 2.39.1 > >

diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index 936f3a8d1b83..6cbecf499767 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -699,7 +699,7 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, struct kvm_vcpu **vcpu, pr_info("Testing guest mode: %s\n", vm_guest_mode_string(mode)); - vm = __vm_create(mode, 1, extra_mem_pages); + vm = __vm_create(VM_SHAPE(mode), 1, extra_mem_pages); log_mode_create_vm_done(vm); *vcpu = vm_vcpu_add(vm, 0, guest_code); diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h index 1441fca6c273..157508c071f3 100644 --- a/tools/testing/selftests/kvm/include/kvm_util_base.h +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h @@ -188,6 +188,23 @@ enum vm_guest_mode { NUM_VM_MODES, }; +struct vm_shape { + enum vm_guest_mode mode; + unsigned int type; +}; + +#define VM_TYPE_DEFAULT 0 + +#define VM_SHAPE(__mode) \ +({ \ + struct vm_shape shape = { \ + .mode = (__mode), \ + .type = VM_TYPE_DEFAULT \ + }; \ + \ + shape; \ +}) + #if defined(__aarch64__) extern enum vm_guest_mode vm_mode_default; @@ -220,6 +237,8 @@ extern enum vm_guest_mode vm_mode_default; #endif +#define VM_SHAPE_DEFAULT VM_SHAPE(VM_MODE_DEFAULT) + #define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT) #define PTES_PER_MIN_PAGE ptes_per_page(MIN_PAGE_SIZE) @@ -784,21 +803,21 @@ vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm); * __vm_create() does NOT create vCPUs, @nr_runnable_vcpus is used purely to * calculate the amount of memory needed for per-vCPU data, e.g. stacks. */ -struct kvm_vm *____vm_create(enum vm_guest_mode mode); -struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint32_t nr_runnable_vcpus, +struct kvm_vm *____vm_create(struct vm_shape shape); +struct kvm_vm *__vm_create(struct vm_shape shape, uint32_t nr_runnable_vcpus, uint64_t nr_extra_pages); static inline struct kvm_vm *vm_create_barebones(void) { - return ____vm_create(VM_MODE_DEFAULT); + return ____vm_create(VM_SHAPE_DEFAULT); } static inline struct kvm_vm *vm_create(uint32_t nr_runnable_vcpus) { - return __vm_create(VM_MODE_DEFAULT, nr_runnable_vcpus, 0); + return __vm_create(VM_SHAPE_DEFAULT, nr_runnable_vcpus, 0); } -struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus, +struct kvm_vm *__vm_create_with_vcpus(struct vm_shape shape, uint32_t nr_vcpus, uint64_t extra_mem_pages, void *guest_code, struct kvm_vcpu *vcpus[]); @@ -806,17 +825,27 @@ static inline struct kvm_vm *vm_create_with_vcpus(uint32_t nr_vcpus, void *guest_code, struct kvm_vcpu *vcpus[]) { - return __vm_create_with_vcpus(VM_MODE_DEFAULT, nr_vcpus, 0, + return __vm_create_with_vcpus(VM_SHAPE_DEFAULT, nr_vcpus, 0, guest_code, vcpus); } + +struct kvm_vm *__vm_create_shape_with_one_vcpu(struct vm_shape shape, + struct kvm_vcpu **vcpu, + uint64_t extra_mem_pages, + void *guest_code); + /* * Create a VM with a single vCPU with reasonable defaults and @extra_mem_pages * additional pages of guest memory. Returns the VM and vCPU (via out param). */ -struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, - uint64_t extra_mem_pages, - void *guest_code); +static inline struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, + uint64_t extra_mem_pages, + void *guest_code) +{ + return __vm_create_shape_with_one_vcpu(VM_SHAPE_DEFAULT, vcpu, + extra_mem_pages, guest_code); +} static inline struct kvm_vm *vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, void *guest_code) @@ -824,6 +853,13 @@ static inline struct kvm_vm *vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, return __vm_create_with_one_vcpu(vcpu, 0, guest_code); } +static inline struct kvm_vm *vm_create_shape_with_one_vcpu(struct vm_shape shape, + struct kvm_vcpu **vcpu, + void *guest_code) +{ + return __vm_create_shape_with_one_vcpu(shape, vcpu, 0, guest_code); +} + struct kvm_vcpu *vm_recreate_with_one_vcpu(struct kvm_vm *vm); void kvm_pin_this_task_to_pcpu(uint32_t pcpu); diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c index 69f26d80c821..e37dc9c21888 100644 --- a/tools/testing/selftests/kvm/kvm_page_table_test.c +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c @@ -254,7 +254,7 @@ static struct kvm_vm *pre_init_before_test(enum vm_guest_mode mode, void *arg) /* Create a VM with enough guest pages */ guest_num_pages = test_mem_size / guest_page_size; - vm = __vm_create_with_vcpus(mode, nr_vcpus, guest_num_pages, + vm = __vm_create_with_vcpus(VM_SHAPE(mode), nr_vcpus, guest_num_pages, guest_code, test_args.vcpus); /* Align down GPA of the testing memslot */ diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 95a553400ea9..1c74310f1d44 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -209,7 +209,7 @@ __weak void vm_vaddr_populate_bitmap(struct kvm_vm *vm) (1ULL << (vm->va_bits - 1)) >> vm->page_shift); } -struct kvm_vm *____vm_create(enum vm_guest_mode mode) +struct kvm_vm *____vm_create(struct vm_shape shape) { struct kvm_vm *vm; @@ -221,13 +221,13 @@ struct kvm_vm *____vm_create(enum vm_guest_mode mode) vm->regions.hva_tree = RB_ROOT; hash_init(vm->regions.slot_hash); - vm->mode = mode; - vm->type = 0; + vm->mode = shape.mode; + vm->type = shape.type; - vm->pa_bits = vm_guest_mode_params[mode].pa_bits; - vm->va_bits = vm_guest_mode_params[mode].va_bits; - vm->page_size = vm_guest_mode_params[mode].page_size; - vm->page_shift = vm_guest_mode_params[mode].page_shift; + vm->pa_bits = vm_guest_mode_params[vm->mode].pa_bits; + vm->va_bits = vm_guest_mode_params[vm->mode].va_bits; + vm->page_size = vm_guest_mode_params[vm->mode].page_size; + vm->page_shift = vm_guest_mode_params[vm->mode].page_shift; /* Setup mode specific traits. */ switch (vm->mode) { @@ -265,7 +265,7 @@ struct kvm_vm *____vm_create(enum vm_guest_mode mode) /* * Ignore KVM support for 5-level paging (vm->va_bits == 57), * it doesn't take effect unless a CR4.LA57 is set, which it - * isn't for this VM_MODE. + * isn't for this mode (48-bit virtual address space). */ TEST_ASSERT(vm->va_bits == 48 || vm->va_bits == 57, "Linear address width (%d bits) not supported", @@ -285,10 +285,11 @@ struct kvm_vm *____vm_create(enum vm_guest_mode mode) vm->pgtable_levels = 5; break; default: - TEST_FAIL("Unknown guest mode, mode: 0x%x", mode); + TEST_FAIL("Unknown guest mode: 0x%x", vm->mode); } #ifdef __aarch64__ + TEST_ASSERT(!vm->type, "ARM doesn't support test-provided types"); if (vm->pa_bits != 40) vm->type = KVM_VM_TYPE_ARM_IPA_SIZE(vm->pa_bits); #endif @@ -347,19 +348,19 @@ static uint64_t vm_nr_pages_required(enum vm_guest_mode mode, return vm_adjust_num_guest_pages(mode, nr_pages); } -struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint32_t nr_runnable_vcpus, +struct kvm_vm *__vm_create(struct vm_shape shape, uint32_t nr_runnable_vcpus, uint64_t nr_extra_pages) { - uint64_t nr_pages = vm_nr_pages_required(mode, nr_runnable_vcpus, + uint64_t nr_pages = vm_nr_pages_required(shape.mode, nr_runnable_vcpus, nr_extra_pages); struct userspace_mem_region *slot0; struct kvm_vm *vm; int i; - pr_debug("%s: mode='%s' pages='%ld'\n", __func__, - vm_guest_mode_string(mode), nr_pages); + pr_debug("%s: mode='%s' type='%d', pages='%ld'\n", __func__, + vm_guest_mode_string(shape.mode), shape.type, nr_pages); - vm = ____vm_create(mode); + vm = ____vm_create(shape); vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, 0); for (i = 0; i < NR_MEM_REGIONS; i++) @@ -400,7 +401,7 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint32_t nr_runnable_vcpus, * extra_mem_pages is only used to calculate the maximum page table size, * no real memory allocation for non-slot0 memory in this function. */ -struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus, +struct kvm_vm *__vm_create_with_vcpus(struct vm_shape shape, uint32_t nr_vcpus, uint64_t extra_mem_pages, void *guest_code, struct kvm_vcpu *vcpus[]) { @@ -409,7 +410,7 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus TEST_ASSERT(!nr_vcpus || vcpus, "Must provide vCPU array"); - vm = __vm_create(mode, nr_vcpus, extra_mem_pages); + vm = __vm_create(shape, nr_vcpus, extra_mem_pages); for (i = 0; i < nr_vcpus; ++i) vcpus[i] = vm_vcpu_add(vm, i, guest_code); @@ -417,15 +418,15 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus return vm; } -struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu, - uint64_t extra_mem_pages, - void *guest_code) +struct kvm_vm *__vm_create_shape_with_one_vcpu(struct vm_shape shape, + struct kvm_vcpu **vcpu, + uint64_t extra_mem_pages, + void *guest_code) { struct kvm_vcpu *vcpus[1]; struct kvm_vm *vm; - vm = __vm_create_with_vcpus(VM_MODE_DEFAULT, 1, extra_mem_pages, - guest_code, vcpus); + vm = __vm_create_with_vcpus(shape, 1, extra_mem_pages, guest_code, vcpus); *vcpu = vcpus[0]; return vm; diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c index df457452d146..d05487e5a371 100644 --- a/tools/testing/selftests/kvm/lib/memstress.c +++ b/tools/testing/selftests/kvm/lib/memstress.c @@ -168,7 +168,8 @@ struct kvm_vm *memstress_create_vm(enum vm_guest_mode mode, int nr_vcpus, * The memory is also added to memslot 0, but that's a benign side * effect as KVM allows aliasing HVAs in meslots. */ - vm = __vm_create_with_vcpus(mode, nr_vcpus, slot0_pages + guest_num_pages, + vm = __vm_create_with_vcpus(VM_SHAPE(mode), nr_vcpus, + slot0_pages + guest_num_pages, memstress_guest_code, vcpus); args->vm = vm; diff --git a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c index 85f34ca7e49e..0ed32ec903d0 100644 --- a/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c +++ b/tools/testing/selftests/kvm/x86_64/ucna_injection_test.c @@ -271,7 +271,7 @@ int main(int argc, char *argv[]) kvm_check_cap(KVM_CAP_MCE); - vm = __vm_create(VM_MODE_DEFAULT, 3, 0); + vm = __vm_create(VM_SHAPE_DEFAULT, 3, 0); kvm_ioctl(vm->kvm_fd, KVM_X86_GET_MCE_CAP_SUPPORTED, &supported_mcg_caps);

[27/34] KVM: selftests: Introduce VM "shape" to allow tests to specify the VM type

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