From patchwork Tue Sep 14 16:47:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Gonda X-Patchwork-Id: 12494289 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-23.5 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 641D2C4332F for ; Tue, 14 Sep 2021 16:47:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4982F610E6 for ; Tue, 14 Sep 2021 16:47:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230293AbhINQtB (ORCPT ); Tue, 14 Sep 2021 12:49:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230207AbhINQsz (ORCPT ); Tue, 14 Sep 2021 12:48:55 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E3CAC061766 for ; Tue, 14 Sep 2021 09:47:38 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id a5-20020a656405000000b002692b7b6d95so9746656pgv.11 for ; Tue, 14 Sep 2021 09:47:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=nEzN9hRbkHfp1Go2P4vKAnhGUtg9DnodsmPyxoY5+Bw=; b=Z7tnvDe+7SA4bVTQ77dFe7lqvdYrU7IkL4BoUdwI2KcMDnqaShc7PnssO8O7zHZ0Gz 6p2dz5LQcXUUD5Q3ukk/jIp5o1hZ+WsSXYhLlTcPPh6DNEKXJ07etdWBQMWP8hi1K2e0 k/CFgBPWKsD1wS3lOqy58EhhBs8h3dAs6FXivJJF2x4/IspjkMQE1/u07a1rDcNzwn7x 4Aj9f0ma+eYARb9LYsXkSZY+YBA0VY8Dgz5DFamymvRPtLilrqPs3YabNTOF3G58LjMw A+OgvRt/cX1VnwmgCrmG2IjU9NLxw+0tp/veJzDxrCY3Kfw+IYHOzysh4nAzkUbKawnp 1q3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=nEzN9hRbkHfp1Go2P4vKAnhGUtg9DnodsmPyxoY5+Bw=; b=gMpKbfmzsb6bN2M5ToW4sPkNTnCwKx8pMujsRXHr3OMSRHGu26gLLDu1lxcGwP6F/o xl0WnBICo+uBIIobZslEq7p+D3k5yLMVLRI1XBDkRbZyvp3W4VdeeNJkgYliMU+ffTOl p+HwrgiLbksHPldYQRBKokEc8rg+91aRKMvnLTVbESofvKnAYDLXiHdh8+TdNxeRfTN/ sKTK/OfBBaIzuHU3tuwc/ei3lNP5zqbNRiGWdLSJMtf9ILJ9wjI8i/dujoKj1Q0izkHk IvJtQUcrKpIYAxv/IAB6uAdHfs8aLF4wxvMqfzeVnUCPOc5Hhs8N1QY/loBl/Bp4gMdw f4CQ== X-Gm-Message-State: AOAM5332HguYgi6xtWO8vxGpT5Sta9BP3xTb4Vl2jpqQdVmown1kzrnf ERQJTB8gilTf0SmuVn5Sg9ZaGkdNS1cLDuD4CAnwSYECOGCjoCVBlAI1fukDvRlcipId3nibvss dpG7GA99DTxLjSNSkfeODshuhJTnwhEkQhskbC0bTmR17q0Rs1dDl4bZ9kQ== X-Google-Smtp-Source: ABdhPJyrpI+j0kUaSBEIkZYtkoHp8PeGuh+ectwaSIO0BRZUjgF4pyomcN9rpOPk29OJ1EGI6X9YF1ixOP4= X-Received: from pgonda1.kir.corp.google.com ([2620:15c:29:204:b358:1f40:79d5:ab23]) (user=pgonda job=sendgmr) by 2002:a17:90b:1bd1:: with SMTP id oa17mr3183602pjb.82.1631638057872; Tue, 14 Sep 2021 09:47:37 -0700 (PDT) Date: Tue, 14 Sep 2021 09:47:27 -0700 In-Reply-To: <20210914164727.3007031-1-pgonda@google.com> Message-Id: <20210914164727.3007031-5-pgonda@google.com> Mime-Version: 1.0 References: <20210914164727.3007031-1-pgonda@google.com> X-Mailer: git-send-email 2.33.0.309.g3052b89438-goog Subject: [PATCH 4/4 V8] selftest: KVM: Add intra host migration tests From: Peter Gonda To: kvm@vger.kernel.org Cc: Peter Gonda , Sean Christopherson , Marc Orr , David Rientjes , Brijesh Singh , linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Adds testcases for intra host migration for SEV and SEV-ES. Also adds locking test to confirm no deadlock exists. Signed-off-by: Peter Gonda Suggested-by: Sean Christopherson Reviewed-by: Marc Orr Cc: Marc Orr Cc: Sean Christopherson Cc: David Rientjes Cc: Brijesh Singh Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Marc Orr --- tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/x86_64/sev_vm_tests.c | 203 ++++++++++++++++++ 2 files changed, 204 insertions(+) create mode 100644 tools/testing/selftests/kvm/x86_64/sev_vm_tests.c diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index c103873531e0..44fd3566fb51 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -72,6 +72,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/vmx_pmu_msrs_test TEST_GEN_PROGS_x86_64 += x86_64/xen_shinfo_test TEST_GEN_PROGS_x86_64 += x86_64/xen_vmcall_test TEST_GEN_PROGS_x86_64 += x86_64/vmx_pi_mmio_test +TEST_GEN_PROGS_x86_64 += x86_64/sev_vm_tests TEST_GEN_PROGS_x86_64 += access_tracking_perf_test TEST_GEN_PROGS_x86_64 += demand_paging_test TEST_GEN_PROGS_x86_64 += dirty_log_test diff --git a/tools/testing/selftests/kvm/x86_64/sev_vm_tests.c b/tools/testing/selftests/kvm/x86_64/sev_vm_tests.c new file mode 100644 index 000000000000..ec3bbc96e73a --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/sev_vm_tests.c @@ -0,0 +1,203 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include +#include +#include +#include +#include +#include + +#include "test_util.h" +#include "kvm_util.h" +#include "processor.h" +#include "svm_util.h" +#include "kselftest.h" +#include "../lib/kvm_util_internal.h" + +#define SEV_POLICY_ES 0b100 + +#define NR_MIGRATE_TEST_VCPUS 4 +#define NR_MIGRATE_TEST_VMS 3 +#define NR_LOCK_TESTING_THREADS 3 +#define NR_LOCK_TESTING_ITERATIONS 10000 + +static void sev_ioctl(int vm_fd, int cmd_id, void *data) +{ + struct kvm_sev_cmd cmd = { + .id = cmd_id, + .data = (uint64_t)data, + .sev_fd = open_sev_dev_path_or_exit(), + }; + int ret; + + ret = ioctl(vm_fd, KVM_MEMORY_ENCRYPT_OP, &cmd); + TEST_ASSERT((ret == 0 || cmd.error == SEV_RET_SUCCESS), + "%d failed: return code: %d, errno: %d, fw error: %d", + cmd_id, ret, errno, cmd.error); +} + +static struct kvm_vm *sev_vm_create(bool es) +{ + struct kvm_vm *vm; + struct kvm_sev_launch_start start = { 0 }; + int i; + + vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); + sev_ioctl(vm->fd, es ? KVM_SEV_ES_INIT : KVM_SEV_INIT, NULL); + for (i = 0; i < NR_MIGRATE_TEST_VCPUS; ++i) + vm_vcpu_add(vm, i); + if (es) + start.policy |= SEV_POLICY_ES; + sev_ioctl(vm->fd, KVM_SEV_LAUNCH_START, &start); + if (es) + sev_ioctl(vm->fd, KVM_SEV_LAUNCH_UPDATE_VMSA, NULL); + return vm; +} + +static struct kvm_vm *__vm_create(void) +{ + struct kvm_vm *vm; + int i; + + vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); + for (i = 0; i < NR_MIGRATE_TEST_VCPUS; ++i) + vm_vcpu_add(vm, i); + + return vm; +} + +static int __sev_migrate_from(int dst_fd, int src_fd) +{ + struct kvm_enable_cap cap = { + .cap = KVM_CAP_VM_MIGRATE_PROTECTED_VM_FROM, + .args = { src_fd } + }; + + return ioctl(dst_fd, KVM_ENABLE_CAP, &cap); +} + + +static void sev_migrate_from(int dst_fd, int src_fd) +{ + int ret; + + ret = __sev_migrate_from(dst_fd, src_fd); + TEST_ASSERT(!ret, "Migration failed, ret: %d, errno: %d\n", ret, errno); +} + +static void test_sev_migrate_from(bool es) +{ + struct kvm_vm *src_vm; + struct kvm_vm *dst_vms[NR_MIGRATE_TEST_VMS]; + int i; + + src_vm = sev_vm_create(es); + for (i = 0; i < NR_MIGRATE_TEST_VMS; ++i) + dst_vms[i] = __vm_create(); + + /* Initial migration from the src to the first dst. */ + sev_migrate_from(dst_vms[0]->fd, src_vm->fd); + + for (i = 1; i < NR_MIGRATE_TEST_VMS; i++) + sev_migrate_from(dst_vms[i]->fd, dst_vms[i - 1]->fd); + + /* Migrate the guest back to the original VM. */ + sev_migrate_from(src_vm->fd, dst_vms[NR_MIGRATE_TEST_VMS - 1]->fd); + + kvm_vm_free(src_vm); + for (i = 0; i < NR_MIGRATE_TEST_VMS; ++i) + kvm_vm_free(dst_vms[i]); +} + +struct locking_thread_input { + struct kvm_vm *vm; + int source_fds[NR_LOCK_TESTING_THREADS]; +}; + +static void *locking_test_thread(void *arg) +{ + int i, j; + struct locking_thread_input *input = (struct locking_test_thread *)arg; + + for (i = 0; i < NR_LOCK_TESTING_ITERATIONS; ++i) { + j = i % NR_LOCK_TESTING_THREADS; + __sev_migrate_from(input->vm->fd, input->source_fds[j]); + } + + return NULL; +} + +static void test_sev_migrate_locking(void) +{ + struct locking_thread_input input[NR_LOCK_TESTING_THREADS]; + pthread_t pt[NR_LOCK_TESTING_THREADS]; + int i; + + for (i = 0; i < NR_LOCK_TESTING_THREADS; ++i) { + input[i].vm = sev_vm_create(/* es= */ false); + input[0].source_fds[i] = input[i].vm->fd; + } + for (i = 1; i < NR_LOCK_TESTING_THREADS; ++i) + memcpy(input[i].source_fds, input[0].source_fds, + sizeof(input[i].source_fds)); + + for (i = 0; i < NR_LOCK_TESTING_THREADS; ++i) + pthread_create(&pt[i], NULL, locking_test_thread, &input[i]); + + for (i = 0; i < NR_LOCK_TESTING_THREADS; ++i) + pthread_join(pt[i], NULL); +} + +static void test_sev_migrate_parameters(void) +{ + struct kvm_vm *sev_vm, *sev_es_vm, *vm_no_vcpu, *vm_no_sev, + *sev_es_vm_no_vmsa; + int ret; + + sev_vm = sev_vm_create(/* es= */ false); + sev_es_vm = sev_vm_create(/* es= */ true); + vm_no_vcpu = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); + vm_no_sev = __vm_create(); + sev_es_vm_no_vmsa = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); + sev_ioctl(sev_es_vm_no_vmsa->fd, KVM_SEV_ES_INIT, NULL); + vm_vcpu_add(sev_es_vm_no_vmsa, 1); + + + ret = __sev_migrate_from(sev_vm->fd, sev_es_vm->fd); + TEST_ASSERT( + ret == -1 && errno == EINVAL, + "Should not be able migrate to SEV enabled VM. ret: %d, errno: %d\n", + ret, errno); + + ret = __sev_migrate_from(sev_es_vm->fd, sev_vm->fd); + TEST_ASSERT( + ret == -1 && errno == EINVAL, + "Should not be able migrate to SEV-ES enabled VM. ret: %d, errno: %d\n", + ret, errno); + + ret = __sev_migrate_from(vm_no_vcpu->fd, sev_es_vm->fd); + TEST_ASSERT( + ret == -1 && errno == EINVAL, + "SEV-ES migrations require same number of vCPUS. ret: %d, errno: %d\n", + ret, errno); + + ret = __sev_migrate_from(vm_no_vcpu->fd, sev_es_vm_no_vmsa->fd); + TEST_ASSERT( + ret == -1 && errno == EINVAL, + "SEV-ES migrations require UPDATE_VMSA. ret %d, errno: %d\n", + ret, errno); + + ret = __sev_migrate_from(vm_no_vcpu->fd, vm_no_sev->fd); + TEST_ASSERT(ret == -1 && errno == EINVAL, + "Migrations require SEV enabled. ret %d, errno: %d\n", ret, + errno); +} + +int main(int argc, char *argv[]) +{ + test_sev_migrate_from(/* es= */ false); + test_sev_migrate_from(/* es= */ true); + test_sev_migrate_locking(); + test_sev_migrate_parameters(); + return 0; +}