From patchwork Tue Oct 5 14:13:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Gonda X-Patchwork-Id: 12536891 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA78FC433EF for ; Tue, 5 Oct 2021 14:15:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D73B46113A for ; Tue, 5 Oct 2021 14:15:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235871AbhJEORI (ORCPT ); Tue, 5 Oct 2021 10:17:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40960 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235358AbhJEOQ6 (ORCPT ); Tue, 5 Oct 2021 10:16:58 -0400 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C24AC0612A5 for ; Tue, 5 Oct 2021 07:14:14 -0700 (PDT) Received: by mail-pg1-x549.google.com with SMTP id p19-20020a634f53000000b002877a03b293so12503297pgl.10 for ; Tue, 05 Oct 2021 07:14:14 -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=YUtrtiwbKfY9rDzT+0XeYzKLaqbwCbEKDHs2gDl3TcQ=; b=mJH8mNs3mSfInuaKeg8/apHMOo6n0c/5ddij1DG6793INyJ7r4yxavZMHLYGSdYxEx bz1T8L/exv1bN9SviQoo3URk9iHGG3xoup+pR0W7bjK0ll/kYKGPsmwrAw7OrNEz11lN Tp6rV+pANiwMt+HZTpxgJP8Q2NDuOc8XvszWIpGifJpvC2U/SXGl6V2UBUiXWF3BdZxz NinxI8CsKrmRII6SzxlmyqCTCQo4bQWXuTtVGYy6IDxWMbGoJuTRC4AXGMGhY6J+6O3j rsghr0ZMcz3CRaCsTSAKcxBggKHcg+mAJcQxdhzEGOBji8kbc3UFRAS8xNW3iSEvUQ1X OhZQ== 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=YUtrtiwbKfY9rDzT+0XeYzKLaqbwCbEKDHs2gDl3TcQ=; b=JK5XD77Q5V2Xha2h8DsRhS+KdhzKOy1Y96DEMy1zIO91+OcCekjrISzkLTyer+6+R1 3LjI54Lp4hworuZJDs9SfFCvSpbcRoDu1u67MfGqfdyEvvPu5/J9jyQdRjzNOabWdMdc Dk09FeXbZ7y5mG8BEOi05vP28sBP1yI+5o3B1FOzLg8QWUR024gwfZ4vn3V4yU+SqCkI jvIrD2kPZuahRNahxIs3Hd8ucn7+1as3w7+PmADUfJmYsPmE3bV+VTy4Sek81+Ct7o0G pN/ccdQM/kXNxAMq7nAe0GERY8IjwsB2MtUMp8datTMtrkaiVMuYZEz3wByfXdkVMXI5 FbIw== X-Gm-Message-State: AOAM533glRn2CT6tJwF4Gys0d3yS/rVP3gj2yohUB3g693SQ9oiOT9Qa ntZh1sC2nE8BK+ZGzfHbwOAF/anBLbQJUWlRxCQ8M/pRyWANT1Rj6eyv/mm20aQC/xwBb50G9bC zL1kYz2A/+0ck9i7xVt+GhBt+aNbBsVDYGs9NS+UN9JBE4Df1GNwV4g0QAQ== X-Google-Smtp-Source: ABdhPJxCNOMoQnphKdlx7pHLYLIuQ/O/Y7g8lZcH016VxxOTUsfTOU+yTOv5PCx7lDDv22rZ6nThdKOjeCE= X-Received: from pgonda1.kir.corp.google.com ([2620:15c:29:204:225f:7216:6111:7f1c]) (user=pgonda job=sendgmr) by 2002:a62:7bd5:0:b0:44c:72f5:5da4 with SMTP id w204-20020a627bd5000000b0044c72f55da4mr6904551pfc.48.1633443253802; Tue, 05 Oct 2021 07:14:13 -0700 (PDT) Date: Tue, 5 Oct 2021 07:13:57 -0700 In-Reply-To: <20211005141357.2393627-1-pgonda@google.com> Message-Id: <20211005141357.2393627-5-pgonda@google.com> Mime-Version: 1.0 References: <20211005141357.2393627-1-pgonda@google.com> X-Mailer: git-send-email 2.33.0.800.g4c38ced690-goog Subject: [PATCH 4/4 V9] 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 , Joerg Roedel , 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: Joerg Roedel Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- 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; +}