From patchwork Tue Mar 8 12:58:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janis Schoetterl-Glausch X-Patchwork-Id: 549539 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1473C433F5 for ; Tue, 8 Mar 2022 12:59:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347015AbiCHNAC (ORCPT ); Tue, 8 Mar 2022 08:00:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346983AbiCHM75 (ORCPT ); Tue, 8 Mar 2022 07:59:57 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17C402C114; Tue, 8 Mar 2022 04:58:55 -0800 (PST) Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 2289OZAs031460; Tue, 8 Mar 2022 12:58:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=SVToMpsm/q4MMkvW2QcjXmJRpyEfmS9hNxs+phFfL0U=; b=qy1XU8gc0lG7XPkFoToOD/QsdjCbpLhqcgK4brrRn/5RG2YCc3p0Ca5c4H56tuNgRZ7c 9xyOw0+5+IJ5ul4awkRpLamzZmEcnSpTaANWpFD9vzlzUDP+D1ombFO77X3uUKb1Plrn XqwOc9N5efehe2f1GCXWXhQiG+SjQGJxZ2zJE1xDAxGviUnQJkc5qSc2WY48iaX8ipKE J0dBUK8i+UAJ/4wUtC9bZcU/Hq/5YtyO9hDOolRJ9Or0ak+LgGQaZT9cZ22RqEGfB7sY c8cb8KnKmkj5TdElcoyduRlEfh9znz56ajpz35uZY+S46g6u+tTBViNwsqH1pPDdAvBq 0g== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3eny18a9v0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 08 Mar 2022 12:58:52 +0000 Received: from m0098396.ppops.net (m0098396.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 228C0GnY030419; Tue, 8 Mar 2022 12:58:52 GMT Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 3eny18a9u5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 08 Mar 2022 12:58:52 +0000 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 228CrskU022872; Tue, 8 Mar 2022 12:58:50 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma04ams.nl.ibm.com with ESMTP id 3enqgnj3dx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 08 Mar 2022 12:58:49 +0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 228Cwkp940370656 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 8 Mar 2022 12:58:46 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BF59211C052; Tue, 8 Mar 2022 12:58:46 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 675C811C050; Tue, 8 Mar 2022 12:58:46 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 8 Mar 2022 12:58:46 +0000 (GMT) From: Janis Schoetterl-Glausch To: Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Shuah Khan Cc: Janis Schoetterl-Glausch , Thomas Huth , David Hildenbrand , kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/5] KVM: s390: selftests: Add more copy memop tests Date: Tue, 8 Mar 2022 13:58:40 +0100 Message-Id: <20220308125841.3271721-5-scgl@linux.ibm.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220308125841.3271721-1-scgl@linux.ibm.com> References: <20220308125841.3271721-1-scgl@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Xm48N0u0gEBG5RDY_QBkIgnoGTOXvb9N X-Proofpoint-ORIG-GUID: KP7MrPwqn1MvTl9evH41LlumLo5qRhRJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-03-08_03,2022-03-04_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 spamscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2203080065 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Do not just test the actual copy, but also that success is indicated when using the check only flag. Add copy test with storage key checking enabled, including tests for storage and fetch protection override. These test cover both logical vcpu ioctls as well as absolute vm ioctls. Signed-off-by: Janis Schoetterl-Glausch --- tools/testing/selftests/kvm/s390x/memop.c | 243 ++++++++++++++++++++-- 1 file changed, 230 insertions(+), 13 deletions(-) diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c index 88ce2d670ed5..c46d47672e2a 100644 --- a/tools/testing/selftests/kvm/s390x/memop.c +++ b/tools/testing/selftests/kvm/s390x/memop.c @@ -195,13 +195,21 @@ static int err_memop_ioctl(struct test_vcpu vcpu, struct kvm_s390_mem_op *ksmo) #define AR(a) ._ar = 1, .ar = (a) #define KEY(a) .f_key = 1, .key = (a) +#define CHECK_N_DO(f, ...) ({ f(__VA_ARGS__, CHECK_ONLY); f(__VA_ARGS__); }) + #define VCPU_ID 1 +#define PAGE_SHIFT 12 +#define PAGE_SIZE (1ULL << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE - 1)) +#define CR0_FETCH_PROTECTION_OVERRIDE (1UL << (63 - 38)) +#define CR0_STORAGE_PROTECTION_OVERRIDE (1UL << (63 - 39)) static uint8_t mem1[65536]; static uint8_t mem2[65536]; struct test_default { struct kvm_vm *kvm_vm; + struct test_vcpu vm; struct test_vcpu vcpu; struct kvm_run *run; int size; @@ -213,6 +221,7 @@ static struct test_default test_default_init(void *guest_code) t.size = min((size_t)kvm_check_cap(KVM_CAP_S390_MEM_OP), sizeof(mem1)); t.kvm_vm = vm_create_default(VCPU_ID, 0, guest_code); + t.vm = (struct test_vcpu) { t.kvm_vm, VM_VCPU_ID }; t.vcpu = (struct test_vcpu) { t.kvm_vm, VCPU_ID }; t.run = vcpu_state(t.kvm_vm, VCPU_ID); return t; @@ -223,6 +232,8 @@ enum stage { STAGE_INITED, /* Guest did nothing */ STAGE_IDLED, + /* Guest set storage keys (specifics up to test case) */ + STAGE_SKEYS_SET, /* Guest copied memory (locations up to test case) */ STAGE_COPIED, }; @@ -239,6 +250,47 @@ enum stage { ASSERT_EQ(uc.args[1], __stage); \ }) \ +static void prepare_mem12(void) +{ + int i; + + for (i = 0; i < sizeof(mem1); i++) + mem1[i] = rand(); + memset(mem2, 0xaa, sizeof(mem2)); +} + +#define ASSERT_MEM_EQ(p1, p2, size) \ + TEST_ASSERT(!memcmp(p1, p2, size), "Memory contents do not match!") + +#define DEFAULT_WRITE_READ(copy_cpu, mop_cpu, mop_target_p, size, ...) \ +({ \ + struct test_vcpu __copy_cpu = (copy_cpu), __mop_cpu = (mop_cpu); \ + enum mop_target __target = (mop_target_p); \ + uint32_t __size = (size); \ + \ + prepare_mem12(); \ + CHECK_N_DO(MOP, __mop_cpu, __target, WRITE, mem1, __size, \ + GADDR_V(mem1), ##__VA_ARGS__); \ + HOST_SYNC(__copy_cpu, STAGE_COPIED); \ + CHECK_N_DO(MOP, __mop_cpu, __target, READ, mem2, __size, \ + GADDR_V(mem2), ##__VA_ARGS__); \ + ASSERT_MEM_EQ(mem1, mem2, __size); \ +}) + +#define DEFAULT_READ(copy_cpu, mop_cpu, mop_target_p, size, ...) \ +({ \ + struct test_vcpu __copy_cpu = (copy_cpu), __mop_cpu = (mop_cpu); \ + enum mop_target __target = (mop_target_p); \ + uint32_t __size = (size); \ + \ + prepare_mem12(); \ + CHECK_N_DO(MOP, __mop_cpu, __target, WRITE, mem1, __size, \ + GADDR_V(mem1)); \ + HOST_SYNC(__copy_cpu, STAGE_COPIED); \ + CHECK_N_DO(MOP, __mop_cpu, __target, READ, mem2, __size, ##__VA_ARGS__);\ + ASSERT_MEM_EQ(mem1, mem2, __size); \ +}) + static void guest_copy(void) { GUEST_SYNC(STAGE_INITED); @@ -249,30 +301,186 @@ static void guest_copy(void) static void test_copy(void) { struct test_default t = test_default_init(guest_copy); - int i; - for (i = 0; i < sizeof(mem1); i++) - mem1[i] = i * i + i; + HOST_SYNC(t.vcpu, STAGE_INITED); + + DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size); + + kvm_vm_free(t.kvm_vm); +} + +static void set_storage_key_range(void *addr, size_t len, uint8_t key) +{ + uintptr_t _addr, abs, i; + int not_mapped = 0; + + _addr = (uintptr_t)addr; + for (i = _addr & PAGE_MASK; i < _addr + len; i += PAGE_SIZE) { + abs = i; + asm volatile ( + "lra %[abs], 0(0,%[abs])\n" + " jz 0f\n" + " llill %[not_mapped],1\n" + " j 1f\n" + "0: sske %[key], %[abs]\n" + "1:" + : [abs] "+&a" (abs), [not_mapped] "+r" (not_mapped) + : [key] "r" (key) + : "cc" + ); + GUEST_ASSERT_EQ(not_mapped, 0); + } +} + +static void guest_copy_key(void) +{ + set_storage_key_range(mem1, sizeof(mem1), 0x90); + set_storage_key_range(mem2, sizeof(mem2), 0x90); + GUEST_SYNC(STAGE_SKEYS_SET); + + for (;;) { + memcpy(&mem2, &mem1, sizeof(mem2)); + GUEST_SYNC(STAGE_COPIED); + } +} + +static void test_copy_key(void) +{ + struct test_default t = test_default_init(guest_copy_key); + + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); + + /* vm, no key */ + DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, t.size); + + /* vm/vcpu, machting key or key 0 */ + DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size, KEY(0)); + DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size, KEY(9)); + DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, t.size, KEY(0)); + DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, t.size, KEY(9)); + /* + * There used to be different code paths for key handling depending on + * if the region crossed a page boundary. + * There currently are not, but the more tests the merrier. + */ + DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, 1, KEY(0)); + DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, 1, KEY(9)); + DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, 1, KEY(0)); + DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, 1, KEY(9)); + + /* vm/vcpu, mismatching keys on read, but no fetch protection */ + DEFAULT_READ(t.vcpu, t.vcpu, LOGICAL, t.size, GADDR_V(mem2), KEY(2)); + DEFAULT_READ(t.vcpu, t.vm, ABSOLUTE, t.size, GADDR_V(mem1), KEY(2)); + + kvm_vm_free(t.kvm_vm); +} + +static void guest_copy_key_fetch_prot(void) +{ + /* + * For some reason combining the first sync with override enablement + * results in an exception when calling HOST_SYNC. + */ + GUEST_SYNC(STAGE_INITED); + /* Storage protection override applies to both store and fetch. */ + set_storage_key_range(mem1, sizeof(mem1), 0x98); + set_storage_key_range(mem2, sizeof(mem2), 0x98); + GUEST_SYNC(STAGE_SKEYS_SET); + + for (;;) { + memcpy(&mem2, &mem1, sizeof(mem2)); + GUEST_SYNC(STAGE_COPIED); + } +} + +static void test_copy_key_storage_prot_override(void) +{ + struct test_default t = test_default_init(guest_copy_key_fetch_prot); HOST_SYNC(t.vcpu, STAGE_INITED); + t.run->s.regs.crs[0] |= CR0_STORAGE_PROTECTION_OVERRIDE; + t.run->kvm_dirty_regs = KVM_SYNC_CRS; + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); - /* Set the first array */ - MOP(t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR_V(mem1)); + /* vcpu, mismatching keys, storage protection override in effect */ + DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size, KEY(2)); - /* Let the guest code copy the first array to the second */ - HOST_SYNC(t.vcpu, STAGE_COPIED); + kvm_vm_free(t.kvm_vm); +} - memset(mem2, 0xaa, sizeof(mem2)); +static void test_copy_key_fetch_prot(void) +{ + struct test_default t = test_default_init(guest_copy_key_fetch_prot); - /* Get the second array */ - MOP(t.vcpu, LOGICAL, READ, mem2, t.size, GADDR_V(mem2)); + HOST_SYNC(t.vcpu, STAGE_INITED); + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); - TEST_ASSERT(!memcmp(mem1, mem2, t.size), - "Memory contents do not match!"); + /* vm/vcpu, matching key, fetch protection in effect */ + DEFAULT_READ(t.vcpu, t.vcpu, LOGICAL, t.size, GADDR_V(mem2), KEY(9)); + DEFAULT_READ(t.vcpu, t.vm, ABSOLUTE, t.size, GADDR_V(mem2), KEY(9)); kvm_vm_free(t.kvm_vm); } +const uint64_t last_page_addr = -PAGE_SIZE; + +static void guest_copy_key_fetch_prot_override(void) +{ + int i; + char *page_0 = 0; + + GUEST_SYNC(STAGE_INITED); + set_storage_key_range(0, PAGE_SIZE, 0x18); + set_storage_key_range((void *)last_page_addr, PAGE_SIZE, 0x0); + asm volatile ("sske %[key],%[addr]\n" :: [addr] "r"(0), [key] "r"(0x18) : "cc"); + GUEST_SYNC(STAGE_SKEYS_SET); + + for (;;) { + for (i = 0; i < PAGE_SIZE; i++) + page_0[i] = mem1[i]; + GUEST_SYNC(STAGE_COPIED); + } +} + +static void test_copy_key_fetch_prot_override(void) +{ + struct test_default t = test_default_init(guest_copy_key_fetch_prot_override); + vm_vaddr_t guest_0_page, guest_last_page; + + guest_0_page = vm_vaddr_alloc(t.kvm_vm, PAGE_SIZE, 0); + guest_last_page = vm_vaddr_alloc(t.kvm_vm, PAGE_SIZE, last_page_addr); + if (guest_0_page != 0 || guest_last_page != last_page_addr) { + print_skip("did not allocate guest pages at required positions"); + goto out; + } + + HOST_SYNC(t.vcpu, STAGE_INITED); + t.run->s.regs.crs[0] |= CR0_FETCH_PROTECTION_OVERRIDE; + t.run->kvm_dirty_regs = KVM_SYNC_CRS; + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); + + /* vcpu, mismatching keys on fetch, fetch protection override applies */ + prepare_mem12(); + MOP(t.vcpu, LOGICAL, WRITE, mem1, PAGE_SIZE, GADDR_V(mem1)); + HOST_SYNC(t.vcpu, STAGE_COPIED); + CHECK_N_DO(MOP, t.vcpu, LOGICAL, READ, mem2, 2048, GADDR_V(guest_0_page), KEY(2)); + ASSERT_MEM_EQ(mem1, mem2, 2048); + + /* + * vcpu, mismatching keys on fetch, fetch protection override applies, + * wraparound + */ + prepare_mem12(); + MOP(t.vcpu, LOGICAL, WRITE, mem1, 2 * PAGE_SIZE, GADDR_V(guest_last_page)); + HOST_SYNC(t.vcpu, STAGE_COPIED); + CHECK_N_DO(MOP, t.vcpu, LOGICAL, READ, mem2, PAGE_SIZE + 2048, + GADDR_V(guest_last_page), KEY(2)); + ASSERT_MEM_EQ(mem1, mem2, 2048); + +out: + kvm_vm_free(t.kvm_vm); +} + static void guest_idle(void) { GUEST_SYNC(STAGE_INITED); /* for consistency's sake */ @@ -335,17 +543,26 @@ static void test_errors(void) int main(int argc, char *argv[]) { - int memop_cap; + int memop_cap, extension_cap; setbuf(stdout, NULL); /* Tell stdout not to buffer its content */ memop_cap = kvm_check_cap(KVM_CAP_S390_MEM_OP); + extension_cap = kvm_check_cap(KVM_CAP_S390_MEM_OP_EXTENSION); if (!memop_cap) { print_skip("CAP_S390_MEM_OP not supported"); exit(KSFT_SKIP); } test_copy(); + if (extension_cap > 0) { + test_copy_key(); + test_copy_key_storage_prot_override(); + test_copy_key_fetch_prot(); + test_copy_key_fetch_prot_override(); + } else { + print_skip("storage key memop extension not supported"); + } test_errors(); return 0;