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-rw-r--r--tools/testing/selftests/kvm/s390x/memop.c782
-rw-r--r--tools/testing/selftests/kvm/s390x/resets.c315
-rw-r--r--tools/testing/selftests/kvm/s390x/sync_regs_test.c252
-rw-r--r--tools/testing/selftests/kvm/s390x/tprot.c243
4 files changed, 1592 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c
new file mode 100644
index 000000000..9113696d5
--- /dev/null
+++ b/tools/testing/selftests/kvm/s390x/memop.c
@@ -0,0 +1,782 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Test for s390x KVM_S390_MEM_OP
+ *
+ * Copyright (C) 2019, Red Hat, Inc.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include <linux/bits.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "kselftest.h"
+
+enum mop_target {
+ LOGICAL,
+ SIDA,
+ ABSOLUTE,
+ INVALID,
+};
+
+enum mop_access_mode {
+ READ,
+ WRITE,
+};
+
+struct mop_desc {
+ uintptr_t gaddr;
+ uintptr_t gaddr_v;
+ uint64_t set_flags;
+ unsigned int f_check : 1;
+ unsigned int f_inject : 1;
+ unsigned int f_key : 1;
+ unsigned int _gaddr_v : 1;
+ unsigned int _set_flags : 1;
+ unsigned int _sida_offset : 1;
+ unsigned int _ar : 1;
+ uint32_t size;
+ enum mop_target target;
+ enum mop_access_mode mode;
+ void *buf;
+ uint32_t sida_offset;
+ uint8_t ar;
+ uint8_t key;
+};
+
+static struct kvm_s390_mem_op ksmo_from_desc(struct mop_desc desc)
+{
+ struct kvm_s390_mem_op ksmo = {
+ .gaddr = (uintptr_t)desc.gaddr,
+ .size = desc.size,
+ .buf = ((uintptr_t)desc.buf),
+ .reserved = "ignored_ignored_ignored_ignored"
+ };
+
+ switch (desc.target) {
+ case LOGICAL:
+ if (desc.mode == READ)
+ ksmo.op = KVM_S390_MEMOP_LOGICAL_READ;
+ if (desc.mode == WRITE)
+ ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
+ break;
+ case SIDA:
+ if (desc.mode == READ)
+ ksmo.op = KVM_S390_MEMOP_SIDA_READ;
+ if (desc.mode == WRITE)
+ ksmo.op = KVM_S390_MEMOP_SIDA_WRITE;
+ break;
+ case ABSOLUTE:
+ if (desc.mode == READ)
+ ksmo.op = KVM_S390_MEMOP_ABSOLUTE_READ;
+ if (desc.mode == WRITE)
+ ksmo.op = KVM_S390_MEMOP_ABSOLUTE_WRITE;
+ break;
+ case INVALID:
+ ksmo.op = -1;
+ }
+ if (desc.f_check)
+ ksmo.flags |= KVM_S390_MEMOP_F_CHECK_ONLY;
+ if (desc.f_inject)
+ ksmo.flags |= KVM_S390_MEMOP_F_INJECT_EXCEPTION;
+ if (desc._set_flags)
+ ksmo.flags = desc.set_flags;
+ if (desc.f_key) {
+ ksmo.flags |= KVM_S390_MEMOP_F_SKEY_PROTECTION;
+ ksmo.key = desc.key;
+ }
+ if (desc._ar)
+ ksmo.ar = desc.ar;
+ else
+ ksmo.ar = 0;
+ if (desc._sida_offset)
+ ksmo.sida_offset = desc.sida_offset;
+
+ return ksmo;
+}
+
+struct test_info {
+ struct kvm_vm *vm;
+ struct kvm_vcpu *vcpu;
+};
+
+#define PRINT_MEMOP false
+static void print_memop(struct kvm_vcpu *vcpu, const struct kvm_s390_mem_op *ksmo)
+{
+ if (!PRINT_MEMOP)
+ return;
+
+ if (!vcpu)
+ printf("vm memop(");
+ else
+ printf("vcpu memop(");
+ switch (ksmo->op) {
+ case KVM_S390_MEMOP_LOGICAL_READ:
+ printf("LOGICAL, READ, ");
+ break;
+ case KVM_S390_MEMOP_LOGICAL_WRITE:
+ printf("LOGICAL, WRITE, ");
+ break;
+ case KVM_S390_MEMOP_SIDA_READ:
+ printf("SIDA, READ, ");
+ break;
+ case KVM_S390_MEMOP_SIDA_WRITE:
+ printf("SIDA, WRITE, ");
+ break;
+ case KVM_S390_MEMOP_ABSOLUTE_READ:
+ printf("ABSOLUTE, READ, ");
+ break;
+ case KVM_S390_MEMOP_ABSOLUTE_WRITE:
+ printf("ABSOLUTE, WRITE, ");
+ break;
+ }
+ printf("gaddr=%llu, size=%u, buf=%llu, ar=%u, key=%u",
+ ksmo->gaddr, ksmo->size, ksmo->buf, ksmo->ar, ksmo->key);
+ if (ksmo->flags & KVM_S390_MEMOP_F_CHECK_ONLY)
+ printf(", CHECK_ONLY");
+ if (ksmo->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION)
+ printf(", INJECT_EXCEPTION");
+ if (ksmo->flags & KVM_S390_MEMOP_F_SKEY_PROTECTION)
+ printf(", SKEY_PROTECTION");
+ puts(")");
+}
+
+static void memop_ioctl(struct test_info info, struct kvm_s390_mem_op *ksmo)
+{
+ struct kvm_vcpu *vcpu = info.vcpu;
+
+ if (!vcpu)
+ vm_ioctl(info.vm, KVM_S390_MEM_OP, ksmo);
+ else
+ vcpu_ioctl(vcpu, KVM_S390_MEM_OP, ksmo);
+}
+
+static int err_memop_ioctl(struct test_info info, struct kvm_s390_mem_op *ksmo)
+{
+ struct kvm_vcpu *vcpu = info.vcpu;
+
+ if (!vcpu)
+ return __vm_ioctl(info.vm, KVM_S390_MEM_OP, ksmo);
+ else
+ return __vcpu_ioctl(vcpu, KVM_S390_MEM_OP, ksmo);
+}
+
+#define MEMOP(err, info_p, mop_target_p, access_mode_p, buf_p, size_p, ...) \
+({ \
+ struct test_info __info = (info_p); \
+ struct mop_desc __desc = { \
+ .target = (mop_target_p), \
+ .mode = (access_mode_p), \
+ .buf = (buf_p), \
+ .size = (size_p), \
+ __VA_ARGS__ \
+ }; \
+ struct kvm_s390_mem_op __ksmo; \
+ \
+ if (__desc._gaddr_v) { \
+ if (__desc.target == ABSOLUTE) \
+ __desc.gaddr = addr_gva2gpa(__info.vm, __desc.gaddr_v); \
+ else \
+ __desc.gaddr = __desc.gaddr_v; \
+ } \
+ __ksmo = ksmo_from_desc(__desc); \
+ print_memop(__info.vcpu, &__ksmo); \
+ err##memop_ioctl(__info, &__ksmo); \
+})
+
+#define MOP(...) MEMOP(, __VA_ARGS__)
+#define ERR_MOP(...) MEMOP(err_, __VA_ARGS__)
+
+#define GADDR(a) .gaddr = ((uintptr_t)a)
+#define GADDR_V(v) ._gaddr_v = 1, .gaddr_v = ((uintptr_t)v)
+#define CHECK_ONLY .f_check = 1
+#define SET_FLAGS(f) ._set_flags = 1, .set_flags = (f)
+#define SIDA_OFFSET(o) ._sida_offset = 1, .sida_offset = (o)
+#define AR(a) ._ar = 1, .ar = (a)
+#define KEY(a) .f_key = 1, .key = (a)
+#define INJECT .f_inject = 1
+
+#define CHECK_N_DO(f, ...) ({ f(__VA_ARGS__, CHECK_ONLY); f(__VA_ARGS__); })
+
+#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_info vm;
+ struct test_info vcpu;
+ struct kvm_run *run;
+ int size;
+};
+
+static struct test_default test_default_init(void *guest_code)
+{
+ struct kvm_vcpu *vcpu;
+ struct test_default t;
+
+ t.size = min((size_t)kvm_check_cap(KVM_CAP_S390_MEM_OP), sizeof(mem1));
+ t.kvm_vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+ t.vm = (struct test_info) { t.kvm_vm, NULL };
+ t.vcpu = (struct test_info) { t.kvm_vm, vcpu };
+ t.run = vcpu->run;
+ return t;
+}
+
+enum stage {
+ /* Synced state set by host, e.g. DAT */
+ 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,
+};
+
+#define HOST_SYNC(info_p, stage) \
+({ \
+ struct test_info __info = (info_p); \
+ struct kvm_vcpu *__vcpu = __info.vcpu; \
+ struct ucall uc; \
+ int __stage = (stage); \
+ \
+ vcpu_run(__vcpu); \
+ get_ucall(__vcpu, &uc); \
+ ASSERT_EQ(uc.cmd, UCALL_SYNC); \
+ 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_info __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_info __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);
+ memcpy(&mem2, &mem1, sizeof(mem2));
+ GUEST_SYNC(STAGE_COPIED);
+}
+
+static void test_copy(void)
+{
+ struct test_default t = test_default_init(guest_copy);
+
+ 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);
+
+ /* vcpu, mismatching keys, storage protection override in effect */
+ DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size, KEY(2));
+
+ kvm_vm_free(t.kvm_vm);
+}
+
+static void test_copy_key_fetch_prot(void)
+{
+ struct test_default t = test_default_init(guest_copy_key_fetch_prot);
+
+ HOST_SYNC(t.vcpu, STAGE_INITED);
+ HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
+
+ /* 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);
+}
+
+#define ERR_PROT_MOP(...) \
+({ \
+ int rv; \
+ \
+ rv = ERR_MOP(__VA_ARGS__); \
+ TEST_ASSERT(rv == 4, "Should result in protection exception"); \
+})
+
+static void guest_error_key(void)
+{
+ GUEST_SYNC(STAGE_INITED);
+ set_storage_key_range(mem1, PAGE_SIZE, 0x18);
+ set_storage_key_range(mem1 + PAGE_SIZE, sizeof(mem1) - PAGE_SIZE, 0x98);
+ GUEST_SYNC(STAGE_SKEYS_SET);
+ GUEST_SYNC(STAGE_IDLED);
+}
+
+static void test_errors_key(void)
+{
+ struct test_default t = test_default_init(guest_error_key);
+
+ HOST_SYNC(t.vcpu, STAGE_INITED);
+ HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
+
+ /* vm/vcpu, mismatching keys, fetch protection in effect */
+ CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR_V(mem1), KEY(2));
+ CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, t.size, GADDR_V(mem2), KEY(2));
+ CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, WRITE, mem1, t.size, GADDR_V(mem1), KEY(2));
+ CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, t.size, GADDR_V(mem2), KEY(2));
+
+ kvm_vm_free(t.kvm_vm);
+}
+
+static void test_termination(void)
+{
+ struct test_default t = test_default_init(guest_error_key);
+ uint64_t prefix;
+ uint64_t teid;
+ uint64_t teid_mask = BIT(63 - 56) | BIT(63 - 60) | BIT(63 - 61);
+ uint64_t psw[2];
+
+ HOST_SYNC(t.vcpu, STAGE_INITED);
+ HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
+
+ /* vcpu, mismatching keys after first page */
+ ERR_PROT_MOP(t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR_V(mem1), KEY(1), INJECT);
+ /*
+ * The memop injected a program exception and the test needs to check the
+ * Translation-Exception Identification (TEID). It is necessary to run
+ * the guest in order to be able to read the TEID from guest memory.
+ * Set the guest program new PSW, so the guest state is not clobbered.
+ */
+ prefix = t.run->s.regs.prefix;
+ psw[0] = t.run->psw_mask;
+ psw[1] = t.run->psw_addr;
+ MOP(t.vm, ABSOLUTE, WRITE, psw, sizeof(psw), GADDR(prefix + 464));
+ HOST_SYNC(t.vcpu, STAGE_IDLED);
+ MOP(t.vm, ABSOLUTE, READ, &teid, sizeof(teid), GADDR(prefix + 168));
+ /* Bits 56, 60, 61 form a code, 0 being the only one allowing for termination */
+ ASSERT_EQ(teid & teid_mask, 0);
+
+ kvm_vm_free(t.kvm_vm);
+}
+
+static void test_errors_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);
+
+ /* vm, mismatching keys, storage protection override not applicable to vm */
+ CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, WRITE, mem1, t.size, GADDR_V(mem1), KEY(2));
+ CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, t.size, GADDR_V(mem2), KEY(2));
+
+ 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 test_errors_key_fetch_prot_override_not_enabled(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);
+ HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
+
+ /* vcpu, mismatching keys on fetch, fetch protection override not enabled */
+ CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, 2048, GADDR_V(0), KEY(2));
+
+out:
+ kvm_vm_free(t.kvm_vm);
+}
+
+static void test_errors_key_fetch_prot_override_enabled(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 does not apply because memory range acceeded
+ */
+ CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, 2048 + 1, GADDR_V(0), KEY(2));
+ CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, PAGE_SIZE + 2048 + 1,
+ GADDR_V(guest_last_page), KEY(2));
+ /* vm, fetch protected override does not apply */
+ CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, 2048, GADDR(0), KEY(2));
+ CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, 2048, GADDR_V(guest_0_page), KEY(2));
+
+out:
+ kvm_vm_free(t.kvm_vm);
+}
+
+static void guest_idle(void)
+{
+ GUEST_SYNC(STAGE_INITED); /* for consistency's sake */
+ for (;;)
+ GUEST_SYNC(STAGE_IDLED);
+}
+
+static void _test_errors_common(struct test_info info, enum mop_target target, int size)
+{
+ int rv;
+
+ /* Bad size: */
+ rv = ERR_MOP(info, target, WRITE, mem1, -1, GADDR_V(mem1));
+ TEST_ASSERT(rv == -1 && errno == E2BIG, "ioctl allows insane sizes");
+
+ /* Zero size: */
+ rv = ERR_MOP(info, target, WRITE, mem1, 0, GADDR_V(mem1));
+ TEST_ASSERT(rv == -1 && (errno == EINVAL || errno == ENOMEM),
+ "ioctl allows 0 as size");
+
+ /* Bad flags: */
+ rv = ERR_MOP(info, target, WRITE, mem1, size, GADDR_V(mem1), SET_FLAGS(-1));
+ TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows all flags");
+
+ /* Bad guest address: */
+ rv = ERR_MOP(info, target, WRITE, mem1, size, GADDR((void *)~0xfffUL), CHECK_ONLY);
+ TEST_ASSERT(rv > 0, "ioctl does not report bad guest memory access");
+
+ /* Bad host address: */
+ rv = ERR_MOP(info, target, WRITE, 0, size, GADDR_V(mem1));
+ TEST_ASSERT(rv == -1 && errno == EFAULT,
+ "ioctl does not report bad host memory address");
+
+ /* Bad key: */
+ rv = ERR_MOP(info, target, WRITE, mem1, size, GADDR_V(mem1), KEY(17));
+ TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows invalid key");
+}
+
+static void test_errors(void)
+{
+ struct test_default t = test_default_init(guest_idle);
+ int rv;
+
+ HOST_SYNC(t.vcpu, STAGE_INITED);
+
+ _test_errors_common(t.vcpu, LOGICAL, t.size);
+ _test_errors_common(t.vm, ABSOLUTE, t.size);
+
+ /* Bad operation: */
+ rv = ERR_MOP(t.vcpu, INVALID, WRITE, mem1, t.size, GADDR_V(mem1));
+ TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows bad operations");
+ /* virtual addresses are not translated when passing INVALID */
+ rv = ERR_MOP(t.vm, INVALID, WRITE, mem1, PAGE_SIZE, GADDR(0));
+ TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows bad operations");
+
+ /* Bad access register: */
+ t.run->psw_mask &= ~(3UL << (63 - 17));
+ t.run->psw_mask |= 1UL << (63 - 17); /* Enable AR mode */
+ HOST_SYNC(t.vcpu, STAGE_IDLED); /* To sync new state to SIE block */
+ rv = ERR_MOP(t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR_V(mem1), AR(17));
+ TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows ARs > 15");
+ t.run->psw_mask &= ~(3UL << (63 - 17)); /* Disable AR mode */
+ HOST_SYNC(t.vcpu, STAGE_IDLED); /* Run to sync new state */
+
+ /* Check that the SIDA calls are rejected for non-protected guests */
+ rv = ERR_MOP(t.vcpu, SIDA, READ, mem1, 8, GADDR(0), SIDA_OFFSET(0x1c0));
+ TEST_ASSERT(rv == -1 && errno == EINVAL,
+ "ioctl does not reject SIDA_READ in non-protected mode");
+ rv = ERR_MOP(t.vcpu, SIDA, WRITE, mem1, 8, GADDR(0), SIDA_OFFSET(0x1c0));
+ TEST_ASSERT(rv == -1 && errno == EINVAL,
+ "ioctl does not reject SIDA_WRITE in non-protected mode");
+
+ kvm_vm_free(t.kvm_vm);
+}
+
+struct testdef {
+ const char *name;
+ void (*test)(void);
+ int extension;
+} testlist[] = {
+ {
+ .name = "simple copy",
+ .test = test_copy,
+ },
+ {
+ .name = "generic error checks",
+ .test = test_errors,
+ },
+ {
+ .name = "copy with storage keys",
+ .test = test_copy_key,
+ .extension = 1,
+ },
+ {
+ .name = "copy with key storage protection override",
+ .test = test_copy_key_storage_prot_override,
+ .extension = 1,
+ },
+ {
+ .name = "copy with key fetch protection",
+ .test = test_copy_key_fetch_prot,
+ .extension = 1,
+ },
+ {
+ .name = "copy with key fetch protection override",
+ .test = test_copy_key_fetch_prot_override,
+ .extension = 1,
+ },
+ {
+ .name = "error checks with key",
+ .test = test_errors_key,
+ .extension = 1,
+ },
+ {
+ .name = "termination",
+ .test = test_termination,
+ .extension = 1,
+ },
+ {
+ .name = "error checks with key storage protection override",
+ .test = test_errors_key_storage_prot_override,
+ .extension = 1,
+ },
+ {
+ .name = "error checks without key fetch prot override",
+ .test = test_errors_key_fetch_prot_override_not_enabled,
+ .extension = 1,
+ },
+ {
+ .name = "error checks with key fetch prot override",
+ .test = test_errors_key_fetch_prot_override_enabled,
+ .extension = 1,
+ },
+};
+
+int main(int argc, char *argv[])
+{
+ int extension_cap, idx;
+
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_S390_MEM_OP));
+
+ setbuf(stdout, NULL); /* Tell stdout not to buffer its content */
+
+ ksft_print_header();
+
+ ksft_set_plan(ARRAY_SIZE(testlist));
+
+ extension_cap = kvm_check_cap(KVM_CAP_S390_MEM_OP_EXTENSION);
+ for (idx = 0; idx < ARRAY_SIZE(testlist); idx++) {
+ if (extension_cap >= testlist[idx].extension) {
+ testlist[idx].test();
+ ksft_test_result_pass("%s\n", testlist[idx].name);
+ } else {
+ ksft_test_result_skip("%s - extension level %d not supported\n",
+ testlist[idx].name,
+ testlist[idx].extension);
+ }
+ }
+
+ ksft_finished(); /* Print results and exit() accordingly */
+}
diff --git a/tools/testing/selftests/kvm/s390x/resets.c b/tools/testing/selftests/kvm/s390x/resets.c
new file mode 100644
index 000000000..19486084e
--- /dev/null
+++ b/tools/testing/selftests/kvm/s390x/resets.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Test for s390x CPU resets
+ *
+ * Copyright (C) 2020, IBM
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "kselftest.h"
+
+#define LOCAL_IRQS 32
+
+#define ARBITRARY_NON_ZERO_VCPU_ID 3
+
+struct kvm_s390_irq buf[ARBITRARY_NON_ZERO_VCPU_ID + LOCAL_IRQS];
+
+static uint8_t regs_null[512];
+
+static void guest_code_initial(void)
+{
+ /* set several CRs to "safe" value */
+ unsigned long cr2_59 = 0x10; /* enable guarded storage */
+ unsigned long cr8_63 = 0x1; /* monitor mask = 1 */
+ unsigned long cr10 = 1; /* PER START */
+ unsigned long cr11 = -1; /* PER END */
+
+
+ /* Dirty registers */
+ asm volatile (
+ " lghi 2,0x11\n" /* Round toward 0 */
+ " sfpc 2\n" /* set fpc to !=0 */
+ " lctlg 2,2,%0\n"
+ " lctlg 8,8,%1\n"
+ " lctlg 10,10,%2\n"
+ " lctlg 11,11,%3\n"
+ /* now clobber some general purpose regs */
+ " llihh 0,0xffff\n"
+ " llihl 1,0x5555\n"
+ " llilh 2,0xaaaa\n"
+ " llill 3,0x0000\n"
+ /* now clobber a floating point reg */
+ " lghi 4,0x1\n"
+ " cdgbr 0,4\n"
+ /* now clobber an access reg */
+ " sar 9,4\n"
+ /* We embed diag 501 here to control register content */
+ " diag 0,0,0x501\n"
+ :
+ : "m" (cr2_59), "m" (cr8_63), "m" (cr10), "m" (cr11)
+ /* no clobber list as this should not return */
+ );
+}
+
+static void test_one_reg(struct kvm_vcpu *vcpu, uint64_t id, uint64_t value)
+{
+ uint64_t eval_reg;
+
+ vcpu_get_reg(vcpu, id, &eval_reg);
+ TEST_ASSERT(eval_reg == value, "value == 0x%lx", value);
+}
+
+static void assert_noirq(struct kvm_vcpu *vcpu)
+{
+ struct kvm_s390_irq_state irq_state;
+ int irqs;
+
+ irq_state.len = sizeof(buf);
+ irq_state.buf = (unsigned long)buf;
+ irqs = __vcpu_ioctl(vcpu, KVM_S390_GET_IRQ_STATE, &irq_state);
+ /*
+ * irqs contains the number of retrieved interrupts. Any interrupt
+ * (notably, the emergency call interrupt we have injected) should
+ * be cleared by the resets, so this should be 0.
+ */
+ TEST_ASSERT(irqs >= 0, "Could not fetch IRQs: errno %d\n", errno);
+ TEST_ASSERT(!irqs, "IRQ pending");
+}
+
+static void assert_clear(struct kvm_vcpu *vcpu)
+{
+ struct kvm_sync_regs *sync_regs = &vcpu->run->s.regs;
+ struct kvm_sregs sregs;
+ struct kvm_regs regs;
+ struct kvm_fpu fpu;
+
+ vcpu_regs_get(vcpu, &regs);
+ TEST_ASSERT(!memcmp(&regs.gprs, regs_null, sizeof(regs.gprs)), "grs == 0");
+
+ vcpu_sregs_get(vcpu, &sregs);
+ TEST_ASSERT(!memcmp(&sregs.acrs, regs_null, sizeof(sregs.acrs)), "acrs == 0");
+
+ vcpu_fpu_get(vcpu, &fpu);
+ TEST_ASSERT(!memcmp(&fpu.fprs, regs_null, sizeof(fpu.fprs)), "fprs == 0");
+
+ /* sync regs */
+ TEST_ASSERT(!memcmp(sync_regs->gprs, regs_null, sizeof(sync_regs->gprs)),
+ "gprs0-15 == 0 (sync_regs)");
+
+ TEST_ASSERT(!memcmp(sync_regs->acrs, regs_null, sizeof(sync_regs->acrs)),
+ "acrs0-15 == 0 (sync_regs)");
+
+ TEST_ASSERT(!memcmp(sync_regs->vrs, regs_null, sizeof(sync_regs->vrs)),
+ "vrs0-15 == 0 (sync_regs)");
+}
+
+static void assert_initial_noclear(struct kvm_vcpu *vcpu)
+{
+ struct kvm_sync_regs *sync_regs = &vcpu->run->s.regs;
+
+ TEST_ASSERT(sync_regs->gprs[0] == 0xffff000000000000UL,
+ "gpr0 == 0xffff000000000000 (sync_regs)");
+ TEST_ASSERT(sync_regs->gprs[1] == 0x0000555500000000UL,
+ "gpr1 == 0x0000555500000000 (sync_regs)");
+ TEST_ASSERT(sync_regs->gprs[2] == 0x00000000aaaa0000UL,
+ "gpr2 == 0x00000000aaaa0000 (sync_regs)");
+ TEST_ASSERT(sync_regs->gprs[3] == 0x0000000000000000UL,
+ "gpr3 == 0x0000000000000000 (sync_regs)");
+ TEST_ASSERT(sync_regs->fprs[0] == 0x3ff0000000000000UL,
+ "fpr0 == 0f1 (sync_regs)");
+ TEST_ASSERT(sync_regs->acrs[9] == 1, "ar9 == 1 (sync_regs)");
+}
+
+static void assert_initial(struct kvm_vcpu *vcpu)
+{
+ struct kvm_sync_regs *sync_regs = &vcpu->run->s.regs;
+ struct kvm_sregs sregs;
+ struct kvm_fpu fpu;
+
+ /* KVM_GET_SREGS */
+ vcpu_sregs_get(vcpu, &sregs);
+ TEST_ASSERT(sregs.crs[0] == 0xE0UL, "cr0 == 0xE0 (KVM_GET_SREGS)");
+ TEST_ASSERT(sregs.crs[14] == 0xC2000000UL,
+ "cr14 == 0xC2000000 (KVM_GET_SREGS)");
+ TEST_ASSERT(!memcmp(&sregs.crs[1], regs_null, sizeof(sregs.crs[1]) * 12),
+ "cr1-13 == 0 (KVM_GET_SREGS)");
+ TEST_ASSERT(sregs.crs[15] == 0, "cr15 == 0 (KVM_GET_SREGS)");
+
+ /* sync regs */
+ TEST_ASSERT(sync_regs->crs[0] == 0xE0UL, "cr0 == 0xE0 (sync_regs)");
+ TEST_ASSERT(sync_regs->crs[14] == 0xC2000000UL,
+ "cr14 == 0xC2000000 (sync_regs)");
+ TEST_ASSERT(!memcmp(&sync_regs->crs[1], regs_null, 8 * 12),
+ "cr1-13 == 0 (sync_regs)");
+ TEST_ASSERT(sync_regs->crs[15] == 0, "cr15 == 0 (sync_regs)");
+ TEST_ASSERT(sync_regs->fpc == 0, "fpc == 0 (sync_regs)");
+ TEST_ASSERT(sync_regs->todpr == 0, "todpr == 0 (sync_regs)");
+ TEST_ASSERT(sync_regs->cputm == 0, "cputm == 0 (sync_regs)");
+ TEST_ASSERT(sync_regs->ckc == 0, "ckc == 0 (sync_regs)");
+ TEST_ASSERT(sync_regs->pp == 0, "pp == 0 (sync_regs)");
+ TEST_ASSERT(sync_regs->gbea == 1, "gbea == 1 (sync_regs)");
+
+ /* kvm_run */
+ TEST_ASSERT(vcpu->run->psw_addr == 0, "psw_addr == 0 (kvm_run)");
+ TEST_ASSERT(vcpu->run->psw_mask == 0, "psw_mask == 0 (kvm_run)");
+
+ vcpu_fpu_get(vcpu, &fpu);
+ TEST_ASSERT(!fpu.fpc, "fpc == 0");
+
+ test_one_reg(vcpu, KVM_REG_S390_GBEA, 1);
+ test_one_reg(vcpu, KVM_REG_S390_PP, 0);
+ test_one_reg(vcpu, KVM_REG_S390_TODPR, 0);
+ test_one_reg(vcpu, KVM_REG_S390_CPU_TIMER, 0);
+ test_one_reg(vcpu, KVM_REG_S390_CLOCK_COMP, 0);
+}
+
+static void assert_normal_noclear(struct kvm_vcpu *vcpu)
+{
+ struct kvm_sync_regs *sync_regs = &vcpu->run->s.regs;
+
+ TEST_ASSERT(sync_regs->crs[2] == 0x10, "cr2 == 10 (sync_regs)");
+ TEST_ASSERT(sync_regs->crs[8] == 1, "cr10 == 1 (sync_regs)");
+ TEST_ASSERT(sync_regs->crs[10] == 1, "cr10 == 1 (sync_regs)");
+ TEST_ASSERT(sync_regs->crs[11] == -1, "cr11 == -1 (sync_regs)");
+}
+
+static void assert_normal(struct kvm_vcpu *vcpu)
+{
+ test_one_reg(vcpu, KVM_REG_S390_PFTOKEN, KVM_S390_PFAULT_TOKEN_INVALID);
+ TEST_ASSERT(vcpu->run->s.regs.pft == KVM_S390_PFAULT_TOKEN_INVALID,
+ "pft == 0xff..... (sync_regs)");
+ assert_noirq(vcpu);
+}
+
+static void inject_irq(struct kvm_vcpu *vcpu)
+{
+ struct kvm_s390_irq_state irq_state;
+ struct kvm_s390_irq *irq = &buf[0];
+ int irqs;
+
+ /* Inject IRQ */
+ irq_state.len = sizeof(struct kvm_s390_irq);
+ irq_state.buf = (unsigned long)buf;
+ irq->type = KVM_S390_INT_EMERGENCY;
+ irq->u.emerg.code = vcpu->id;
+ irqs = __vcpu_ioctl(vcpu, KVM_S390_SET_IRQ_STATE, &irq_state);
+ TEST_ASSERT(irqs >= 0, "Error injecting EMERGENCY IRQ errno %d\n", errno);
+}
+
+static struct kvm_vm *create_vm(struct kvm_vcpu **vcpu)
+{
+ struct kvm_vm *vm;
+
+ vm = vm_create(1);
+
+ *vcpu = vm_vcpu_add(vm, ARBITRARY_NON_ZERO_VCPU_ID, guest_code_initial);
+
+ return vm;
+}
+
+static void test_normal(void)
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+
+ ksft_print_msg("Testing normal reset\n");
+ vm = create_vm(&vcpu);
+
+ vcpu_run(vcpu);
+
+ inject_irq(vcpu);
+
+ vcpu_ioctl(vcpu, KVM_S390_NORMAL_RESET, NULL);
+
+ /* must clears */
+ assert_normal(vcpu);
+ /* must not clears */
+ assert_normal_noclear(vcpu);
+ assert_initial_noclear(vcpu);
+
+ kvm_vm_free(vm);
+}
+
+static void test_initial(void)
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+
+ ksft_print_msg("Testing initial reset\n");
+ vm = create_vm(&vcpu);
+
+ vcpu_run(vcpu);
+
+ inject_irq(vcpu);
+
+ vcpu_ioctl(vcpu, KVM_S390_INITIAL_RESET, NULL);
+
+ /* must clears */
+ assert_normal(vcpu);
+ assert_initial(vcpu);
+ /* must not clears */
+ assert_initial_noclear(vcpu);
+
+ kvm_vm_free(vm);
+}
+
+static void test_clear(void)
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+
+ ksft_print_msg("Testing clear reset\n");
+ vm = create_vm(&vcpu);
+
+ vcpu_run(vcpu);
+
+ inject_irq(vcpu);
+
+ vcpu_ioctl(vcpu, KVM_S390_CLEAR_RESET, NULL);
+
+ /* must clears */
+ assert_normal(vcpu);
+ assert_initial(vcpu);
+ assert_clear(vcpu);
+
+ kvm_vm_free(vm);
+}
+
+struct testdef {
+ const char *name;
+ void (*test)(void);
+ bool needs_cap;
+} testlist[] = {
+ { "initial", test_initial, false },
+ { "normal", test_normal, true },
+ { "clear", test_clear, true },
+};
+
+int main(int argc, char *argv[])
+{
+ bool has_s390_vcpu_resets = kvm_check_cap(KVM_CAP_S390_VCPU_RESETS);
+ int idx;
+
+ setbuf(stdout, NULL); /* Tell stdout not to buffer its content */
+
+ ksft_print_header();
+ ksft_set_plan(ARRAY_SIZE(testlist));
+
+ for (idx = 0; idx < ARRAY_SIZE(testlist); idx++) {
+ if (!testlist[idx].needs_cap || has_s390_vcpu_resets) {
+ testlist[idx].test();
+ ksft_test_result_pass("%s\n", testlist[idx].name);
+ } else {
+ ksft_test_result_skip("%s - no VCPU_RESETS capability\n",
+ testlist[idx].name);
+ }
+ }
+
+ ksft_finished(); /* Print results and exit() accordingly */
+}
diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
new file mode 100644
index 000000000..3fdb6e259
--- /dev/null
+++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
@@ -0,0 +1,252 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Test for s390x KVM_CAP_SYNC_REGS
+ *
+ * Based on the same test for x86:
+ * Copyright (C) 2018, Google LLC.
+ *
+ * Adaptions for s390x:
+ * Copyright (C) 2019, Red Hat, Inc.
+ *
+ * Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
+ */
+
+#define _GNU_SOURCE /* for program_invocation_short_name */
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "diag318_test_handler.h"
+#include "kselftest.h"
+
+static void guest_code(void)
+{
+ /*
+ * We embed diag 501 here instead of doing a ucall to avoid that
+ * the compiler has messed with r11 at the time of the ucall.
+ */
+ asm volatile (
+ "0: diag 0,0,0x501\n"
+ " ahi 11,1\n"
+ " j 0b\n"
+ );
+}
+
+#define REG_COMPARE(reg) \
+ TEST_ASSERT(left->reg == right->reg, \
+ "Register " #reg \
+ " values did not match: 0x%llx, 0x%llx\n", \
+ left->reg, right->reg)
+
+#define REG_COMPARE32(reg) \
+ TEST_ASSERT(left->reg == right->reg, \
+ "Register " #reg \
+ " values did not match: 0x%x, 0x%x\n", \
+ left->reg, right->reg)
+
+
+static void compare_regs(struct kvm_regs *left, struct kvm_sync_regs *right)
+{
+ int i;
+
+ for (i = 0; i < 16; i++)
+ REG_COMPARE(gprs[i]);
+}
+
+static void compare_sregs(struct kvm_sregs *left, struct kvm_sync_regs *right)
+{
+ int i;
+
+ for (i = 0; i < 16; i++)
+ REG_COMPARE32(acrs[i]);
+
+ for (i = 0; i < 16; i++)
+ REG_COMPARE(crs[i]);
+}
+
+#undef REG_COMPARE
+
+#define TEST_SYNC_FIELDS (KVM_SYNC_GPRS|KVM_SYNC_ACRS|KVM_SYNC_CRS|KVM_SYNC_DIAG318)
+#define INVALID_SYNC_FIELD 0x80000000
+
+void test_read_invalid(struct kvm_vcpu *vcpu)
+{
+ struct kvm_run *run = vcpu->run;
+ int rv;
+
+ /* Request reading invalid register set from VCPU. */
+ run->kvm_valid_regs = INVALID_SYNC_FIELD;
+ rv = _vcpu_run(vcpu);
+ TEST_ASSERT(rv < 0 && errno == EINVAL,
+ "Invalid kvm_valid_regs did not cause expected KVM_RUN error: %d\n",
+ rv);
+ run->kvm_valid_regs = 0;
+
+ run->kvm_valid_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS;
+ rv = _vcpu_run(vcpu);
+ TEST_ASSERT(rv < 0 && errno == EINVAL,
+ "Invalid kvm_valid_regs did not cause expected KVM_RUN error: %d\n",
+ rv);
+ run->kvm_valid_regs = 0;
+}
+
+void test_set_invalid(struct kvm_vcpu *vcpu)
+{
+ struct kvm_run *run = vcpu->run;
+ int rv;
+
+ /* Request setting invalid register set into VCPU. */
+ run->kvm_dirty_regs = INVALID_SYNC_FIELD;
+ rv = _vcpu_run(vcpu);
+ TEST_ASSERT(rv < 0 && errno == EINVAL,
+ "Invalid kvm_dirty_regs did not cause expected KVM_RUN error: %d\n",
+ rv);
+ run->kvm_dirty_regs = 0;
+
+ run->kvm_dirty_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS;
+ rv = _vcpu_run(vcpu);
+ TEST_ASSERT(rv < 0 && errno == EINVAL,
+ "Invalid kvm_dirty_regs did not cause expected KVM_RUN error: %d\n",
+ rv);
+ run->kvm_dirty_regs = 0;
+}
+
+void test_req_and_verify_all_valid_regs(struct kvm_vcpu *vcpu)
+{
+ struct kvm_run *run = vcpu->run;
+ struct kvm_sregs sregs;
+ struct kvm_regs regs;
+ int rv;
+
+ /* Request and verify all valid register sets. */
+ run->kvm_valid_regs = TEST_SYNC_FIELDS;
+ rv = _vcpu_run(vcpu);
+ TEST_ASSERT(rv == 0, "vcpu_run failed: %d\n", rv);
+ TEST_ASSERT(run->exit_reason == KVM_EXIT_S390_SIEIC,
+ "Unexpected exit reason: %u (%s)\n",
+ run->exit_reason,
+ exit_reason_str(run->exit_reason));
+ TEST_ASSERT(run->s390_sieic.icptcode == 4 &&
+ (run->s390_sieic.ipa >> 8) == 0x83 &&
+ (run->s390_sieic.ipb >> 16) == 0x501,
+ "Unexpected interception code: ic=%u, ipa=0x%x, ipb=0x%x\n",
+ run->s390_sieic.icptcode, run->s390_sieic.ipa,
+ run->s390_sieic.ipb);
+
+ vcpu_regs_get(vcpu, &regs);
+ compare_regs(&regs, &run->s.regs);
+
+ vcpu_sregs_get(vcpu, &sregs);
+ compare_sregs(&sregs, &run->s.regs);
+}
+
+void test_set_and_verify_various_reg_values(struct kvm_vcpu *vcpu)
+{
+ struct kvm_run *run = vcpu->run;
+ struct kvm_sregs sregs;
+ struct kvm_regs regs;
+ int rv;
+
+ /* Set and verify various register values */
+ run->s.regs.gprs[11] = 0xBAD1DEA;
+ run->s.regs.acrs[0] = 1 << 11;
+
+ run->kvm_valid_regs = TEST_SYNC_FIELDS;
+ run->kvm_dirty_regs = KVM_SYNC_GPRS | KVM_SYNC_ACRS;
+
+ if (get_diag318_info() > 0) {
+ run->s.regs.diag318 = get_diag318_info();
+ run->kvm_dirty_regs |= KVM_SYNC_DIAG318;
+ }
+
+ rv = _vcpu_run(vcpu);
+ TEST_ASSERT(rv == 0, "vcpu_run failed: %d\n", rv);
+ TEST_ASSERT(run->exit_reason == KVM_EXIT_S390_SIEIC,
+ "Unexpected exit reason: %u (%s)\n",
+ run->exit_reason,
+ exit_reason_str(run->exit_reason));
+ TEST_ASSERT(run->s.regs.gprs[11] == 0xBAD1DEA + 1,
+ "r11 sync regs value incorrect 0x%llx.",
+ run->s.regs.gprs[11]);
+ TEST_ASSERT(run->s.regs.acrs[0] == 1 << 11,
+ "acr0 sync regs value incorrect 0x%x.",
+ run->s.regs.acrs[0]);
+ TEST_ASSERT(run->s.regs.diag318 == get_diag318_info(),
+ "diag318 sync regs value incorrect 0x%llx.",
+ run->s.regs.diag318);
+
+ vcpu_regs_get(vcpu, &regs);
+ compare_regs(&regs, &run->s.regs);
+
+ vcpu_sregs_get(vcpu, &sregs);
+ compare_sregs(&sregs, &run->s.regs);
+}
+
+void test_clear_kvm_dirty_regs_bits(struct kvm_vcpu *vcpu)
+{
+ struct kvm_run *run = vcpu->run;
+ int rv;
+
+ /* Clear kvm_dirty_regs bits, verify new s.regs values are
+ * overwritten with existing guest values.
+ */
+ run->kvm_valid_regs = TEST_SYNC_FIELDS;
+ run->kvm_dirty_regs = 0;
+ run->s.regs.gprs[11] = 0xDEADBEEF;
+ run->s.regs.diag318 = 0x4B1D;
+ rv = _vcpu_run(vcpu);
+ TEST_ASSERT(rv == 0, "vcpu_run failed: %d\n", rv);
+ TEST_ASSERT(run->exit_reason == KVM_EXIT_S390_SIEIC,
+ "Unexpected exit reason: %u (%s)\n",
+ run->exit_reason,
+ exit_reason_str(run->exit_reason));
+ TEST_ASSERT(run->s.regs.gprs[11] != 0xDEADBEEF,
+ "r11 sync regs value incorrect 0x%llx.",
+ run->s.regs.gprs[11]);
+ TEST_ASSERT(run->s.regs.diag318 != 0x4B1D,
+ "diag318 sync regs value incorrect 0x%llx.",
+ run->s.regs.diag318);
+}
+
+struct testdef {
+ const char *name;
+ void (*test)(struct kvm_vcpu *vcpu);
+} testlist[] = {
+ { "read invalid", test_read_invalid },
+ { "set invalid", test_set_invalid },
+ { "request+verify all valid regs", test_req_and_verify_all_valid_regs },
+ { "set+verify various regs", test_set_and_verify_various_reg_values },
+ { "clear kvm_dirty_regs bits", test_clear_kvm_dirty_regs_bits },
+};
+
+int main(int argc, char *argv[])
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+ int idx;
+
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_SYNC_REGS));
+
+ /* Tell stdout not to buffer its content */
+ setbuf(stdout, NULL);
+
+ ksft_print_header();
+
+ ksft_set_plan(ARRAY_SIZE(testlist));
+
+ /* Create VM */
+ vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+
+ for (idx = 0; idx < ARRAY_SIZE(testlist); idx++) {
+ testlist[idx].test(vcpu);
+ ksft_test_result_pass("%s\n", testlist[idx].name);
+ }
+
+ kvm_vm_free(vm);
+
+ ksft_finished(); /* Print results and exit() accordingly */
+}
diff --git a/tools/testing/selftests/kvm/s390x/tprot.c b/tools/testing/selftests/kvm/s390x/tprot.c
new file mode 100644
index 000000000..a9a0b76e5
--- /dev/null
+++ b/tools/testing/selftests/kvm/s390x/tprot.c
@@ -0,0 +1,243 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Test TEST PROTECTION emulation.
+ *
+ * Copyright IBM Corp. 2021
+ */
+
+#include <sys/mman.h>
+#include "test_util.h"
+#include "kvm_util.h"
+#include "kselftest.h"
+
+#define PAGE_SHIFT 12
+#define PAGE_SIZE (1 << PAGE_SHIFT)
+#define CR0_FETCH_PROTECTION_OVERRIDE (1UL << (63 - 38))
+#define CR0_STORAGE_PROTECTION_OVERRIDE (1UL << (63 - 39))
+
+static __aligned(PAGE_SIZE) uint8_t pages[2][PAGE_SIZE];
+static uint8_t *const page_store_prot = pages[0];
+static uint8_t *const page_fetch_prot = pages[1];
+
+/* Nonzero return value indicates that address not mapped */
+static int set_storage_key(void *addr, uint8_t key)
+{
+ int not_mapped = 0;
+
+ asm volatile (
+ "lra %[addr], 0(0,%[addr])\n"
+ " jz 0f\n"
+ " llill %[not_mapped],1\n"
+ " j 1f\n"
+ "0: sske %[key], %[addr]\n"
+ "1:"
+ : [addr] "+&a" (addr), [not_mapped] "+r" (not_mapped)
+ : [key] "r" (key)
+ : "cc"
+ );
+ return -not_mapped;
+}
+
+enum permission {
+ READ_WRITE = 0,
+ READ = 1,
+ RW_PROTECTED = 2,
+ TRANSL_UNAVAIL = 3,
+};
+
+static enum permission test_protection(void *addr, uint8_t key)
+{
+ uint64_t mask;
+
+ asm volatile (
+ "tprot %[addr], 0(%[key])\n"
+ " ipm %[mask]\n"
+ : [mask] "=r" (mask)
+ : [addr] "Q" (*(char *)addr),
+ [key] "a" (key)
+ : "cc"
+ );
+
+ return (enum permission)(mask >> 28);
+}
+
+enum stage {
+ STAGE_INIT_SIMPLE,
+ TEST_SIMPLE,
+ STAGE_INIT_FETCH_PROT_OVERRIDE,
+ TEST_FETCH_PROT_OVERRIDE,
+ TEST_STORAGE_PROT_OVERRIDE,
+ STAGE_END /* must be the last entry (it's the amount of tests) */
+};
+
+struct test {
+ enum stage stage;
+ void *addr;
+ uint8_t key;
+ enum permission expected;
+} tests[] = {
+ /*
+ * We perform each test in the array by executing TEST PROTECTION on
+ * the specified addr with the specified key and checking if the returned
+ * permissions match the expected value.
+ * Both guest and host cooperate to set up the required test conditions.
+ * A central condition is that the page targeted by addr has to be DAT
+ * protected in the host mappings, in order for KVM to emulate the
+ * TEST PROTECTION instruction.
+ * Since the page tables are shared, the host uses mprotect to achieve
+ * this.
+ *
+ * Test resulting in RW_PROTECTED/TRANSL_UNAVAIL will be interpreted
+ * by SIE, not KVM, but there is no harm in testing them also.
+ * See Enhanced Suppression-on-Protection Facilities in the
+ * Interpretive-Execution Mode
+ */
+ /*
+ * guest: set storage key of page_store_prot to 1
+ * storage key of page_fetch_prot to 9 and enable
+ * protection for it
+ * STAGE_INIT_SIMPLE
+ * host: write protect both via mprotect
+ */
+ /* access key 0 matches any storage key -> RW */
+ { TEST_SIMPLE, page_store_prot, 0x00, READ_WRITE },
+ /* access key matches storage key -> RW */
+ { TEST_SIMPLE, page_store_prot, 0x10, READ_WRITE },
+ /* mismatched keys, but no fetch protection -> RO */
+ { TEST_SIMPLE, page_store_prot, 0x20, READ },
+ /* access key 0 matches any storage key -> RW */
+ { TEST_SIMPLE, page_fetch_prot, 0x00, READ_WRITE },
+ /* access key matches storage key -> RW */
+ { TEST_SIMPLE, page_fetch_prot, 0x90, READ_WRITE },
+ /* mismatched keys, fetch protection -> inaccessible */
+ { TEST_SIMPLE, page_fetch_prot, 0x10, RW_PROTECTED },
+ /* page 0 not mapped yet -> translation not available */
+ { TEST_SIMPLE, (void *)0x00, 0x10, TRANSL_UNAVAIL },
+ /*
+ * host: try to map page 0
+ * guest: set storage key of page 0 to 9 and enable fetch protection
+ * STAGE_INIT_FETCH_PROT_OVERRIDE
+ * host: write protect page 0
+ * enable fetch protection override
+ */
+ /* mismatched keys, fetch protection, but override applies -> RO */
+ { TEST_FETCH_PROT_OVERRIDE, (void *)0x00, 0x10, READ },
+ /* mismatched keys, fetch protection, override applies to 0-2048 only -> inaccessible */
+ { TEST_FETCH_PROT_OVERRIDE, (void *)2049, 0x10, RW_PROTECTED },
+ /*
+ * host: enable storage protection override
+ */
+ /* mismatched keys, but override applies (storage key 9) -> RW */
+ { TEST_STORAGE_PROT_OVERRIDE, page_fetch_prot, 0x10, READ_WRITE },
+ /* mismatched keys, no fetch protection, override doesn't apply -> RO */
+ { TEST_STORAGE_PROT_OVERRIDE, page_store_prot, 0x20, READ },
+ /* mismatched keys, but override applies (storage key 9) -> RW */
+ { TEST_STORAGE_PROT_OVERRIDE, (void *)2049, 0x10, READ_WRITE },
+ /* end marker */
+ { STAGE_END, 0, 0, 0 },
+};
+
+static enum stage perform_next_stage(int *i, bool mapped_0)
+{
+ enum stage stage = tests[*i].stage;
+ enum permission result;
+ bool skip;
+
+ for (; tests[*i].stage == stage; (*i)++) {
+ /*
+ * Some fetch protection override tests require that page 0
+ * be mapped, however, when the hosts tries to map that page via
+ * vm_vaddr_alloc, it may happen that some other page gets mapped
+ * instead.
+ * In order to skip these tests we detect this inside the guest
+ */
+ skip = tests[*i].addr < (void *)4096 &&
+ tests[*i].expected != TRANSL_UNAVAIL &&
+ !mapped_0;
+ if (!skip) {
+ result = test_protection(tests[*i].addr, tests[*i].key);
+ GUEST_ASSERT_2(result == tests[*i].expected, *i, result);
+ }
+ }
+ return stage;
+}
+
+static void guest_code(void)
+{
+ bool mapped_0;
+ int i = 0;
+
+ GUEST_ASSERT_EQ(set_storage_key(page_store_prot, 0x10), 0);
+ GUEST_ASSERT_EQ(set_storage_key(page_fetch_prot, 0x98), 0);
+ GUEST_SYNC(STAGE_INIT_SIMPLE);
+ GUEST_SYNC(perform_next_stage(&i, false));
+
+ /* Fetch-protection override */
+ mapped_0 = !set_storage_key((void *)0, 0x98);
+ GUEST_SYNC(STAGE_INIT_FETCH_PROT_OVERRIDE);
+ GUEST_SYNC(perform_next_stage(&i, mapped_0));
+
+ /* Storage-protection override */
+ GUEST_SYNC(perform_next_stage(&i, mapped_0));
+}
+
+#define HOST_SYNC_NO_TAP(vcpup, stage) \
+({ \
+ struct kvm_vcpu *__vcpu = (vcpup); \
+ struct ucall uc; \
+ int __stage = (stage); \
+ \
+ vcpu_run(__vcpu); \
+ get_ucall(__vcpu, &uc); \
+ if (uc.cmd == UCALL_ABORT) \
+ REPORT_GUEST_ASSERT_2(uc, "hints: %lu, %lu"); \
+ ASSERT_EQ(uc.cmd, UCALL_SYNC); \
+ ASSERT_EQ(uc.args[1], __stage); \
+})
+
+#define HOST_SYNC(vcpu, stage) \
+({ \
+ HOST_SYNC_NO_TAP(vcpu, stage); \
+ ksft_test_result_pass("" #stage "\n"); \
+})
+
+int main(int argc, char *argv[])
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+ struct kvm_run *run;
+ vm_vaddr_t guest_0_page;
+
+ ksft_print_header();
+ ksft_set_plan(STAGE_END);
+
+ vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+ run = vcpu->run;
+
+ HOST_SYNC(vcpu, STAGE_INIT_SIMPLE);
+ mprotect(addr_gva2hva(vm, (vm_vaddr_t)pages), PAGE_SIZE * 2, PROT_READ);
+ HOST_SYNC(vcpu, TEST_SIMPLE);
+
+ guest_0_page = vm_vaddr_alloc(vm, PAGE_SIZE, 0);
+ if (guest_0_page != 0) {
+ /* Use NO_TAP so we don't get a PASS print */
+ HOST_SYNC_NO_TAP(vcpu, STAGE_INIT_FETCH_PROT_OVERRIDE);
+ ksft_test_result_skip("STAGE_INIT_FETCH_PROT_OVERRIDE - "
+ "Did not allocate page at 0\n");
+ } else {
+ HOST_SYNC(vcpu, STAGE_INIT_FETCH_PROT_OVERRIDE);
+ }
+ if (guest_0_page == 0)
+ mprotect(addr_gva2hva(vm, (vm_vaddr_t)0), PAGE_SIZE, PROT_READ);
+ run->s.regs.crs[0] |= CR0_FETCH_PROTECTION_OVERRIDE;
+ run->kvm_dirty_regs = KVM_SYNC_CRS;
+ HOST_SYNC(vcpu, TEST_FETCH_PROT_OVERRIDE);
+
+ run->s.regs.crs[0] |= CR0_STORAGE_PROTECTION_OVERRIDE;
+ run->kvm_dirty_regs = KVM_SYNC_CRS;
+ HOST_SYNC(vcpu, TEST_STORAGE_PROT_OVERRIDE);
+
+ kvm_vm_free(vm);
+
+ ksft_finished(); /* Print results and exit() accordingly */
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 19:28:10 +0000