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// SPDX-License-Identifier: GPL-2.0-only
/* Test operation exception forwarding.
*
* Copyright IBM Corp. 2025
*
* Authors:
* Janosch Frank <frankja@linux.ibm.com>
*/
#include "facility.h"
#include "kselftest.h"
#include "kvm_util.h"
#include "test_util.h"
#include "sie.h"
#include <linux/kvm.h>
static void guest_code_instr0(void)
{
asm(".word 0x0000");
}
static void test_user_instr0(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
int rc;
vm = vm_create_with_one_vcpu(&vcpu, guest_code_instr0);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_INSTR0, 0);
TEST_ASSERT_EQ(0, rc);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0);
kvm_vm_free(vm);
}
static void guest_code_user_operexec(void)
{
asm(".word 0x0807");
}
static void test_user_operexec(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
int rc;
vm = vm_create_with_one_vcpu(&vcpu, guest_code_user_operexec);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_OPEREXEC, 0);
TEST_ASSERT_EQ(0, rc);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0x0807);
kvm_vm_free(vm);
/*
* Since user_operexec is the superset it can be used for the
* 0 instruction.
*/
vm = vm_create_with_one_vcpu(&vcpu, guest_code_instr0);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_OPEREXEC, 0);
TEST_ASSERT_EQ(0, rc);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0);
kvm_vm_free(vm);
}
/* combine user_instr0 and user_operexec */
static void test_user_operexec_combined(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
int rc;
vm = vm_create_with_one_vcpu(&vcpu, guest_code_user_operexec);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_INSTR0, 0);
TEST_ASSERT_EQ(0, rc);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_OPEREXEC, 0);
TEST_ASSERT_EQ(0, rc);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0x0807);
kvm_vm_free(vm);
/* Reverse enablement order */
vm = vm_create_with_one_vcpu(&vcpu, guest_code_user_operexec);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_OPEREXEC, 0);
TEST_ASSERT_EQ(0, rc);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_INSTR0, 0);
TEST_ASSERT_EQ(0, rc);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0x0807);
kvm_vm_free(vm);
}
static struct kvm_vm *create_vm_without_sthyi(void)
{
struct kvm_s390_vm_cpu_processor info;
struct kvm_vm *vm;
vm = vm_create(1);
kvm_device_attr_get(vm->fd, KVM_S390_VM_CPU_MODEL,
KVM_S390_VM_CPU_PROCESSOR, &info);
clear_bit_inv(74, (unsigned long *)&info.fac_list);
kvm_device_attr_set(vm->fd, KVM_S390_VM_CPU_MODEL,
KVM_S390_VM_CPU_PROCESSOR, &info);
return vm;
}
static void test_user_instr0_no_stfle_74(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
int rc;
vm = create_vm_without_sthyi();
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_INSTR0, 0);
TEST_ASSERT_EQ(0, rc);
vcpu = vm_vcpu_add(vm, 0, guest_code_instr0);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0x0000);
kvm_vm_free(vm);
}
static void test_user_operexec_no_stfle_74(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
int rc;
vm = create_vm_without_sthyi();
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_OPEREXEC, 0);
TEST_ASSERT_EQ(0, rc);
vcpu = vm_vcpu_add(vm, 0, guest_code_user_operexec);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0x0807);
kvm_vm_free(vm);
}
static void test_instr0_combined_no_stfle_74(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
int rc;
vm = create_vm_without_sthyi();
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_INSTR0, 0);
TEST_ASSERT_EQ(0, rc);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_OPEREXEC, 0);
TEST_ASSERT_EQ(0, rc);
vcpu = vm_vcpu_add(vm, 0, guest_code_instr0);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0x0000);
kvm_vm_free(vm);
}
static void test_operexec_combined_no_stfle_74(void)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
int rc;
vm = create_vm_without_sthyi();
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_INSTR0, 0);
TEST_ASSERT_EQ(0, rc);
rc = __vm_enable_cap(vm, KVM_CAP_S390_USER_OPEREXEC, 0);
TEST_ASSERT_EQ(0, rc);
vcpu = vm_vcpu_add(vm, 0, guest_code_user_operexec);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.icptcode, ICPT_OPEREXC);
TEST_ASSERT_EQ(vcpu->run->s390_sieic.ipa, 0x0807);
kvm_vm_free(vm);
}
/*
* Run all tests above.
*
* Enablement after VCPU has been added is automatically tested since
* we enable the capability after VCPU creation.
*/
static struct testdef {
const char *name;
void (*test)(void);
} testlist[] = {
{ "instr0", test_user_instr0 },
{ "operexec", test_user_operexec },
{ "operexec_combined", test_user_operexec_combined},
{ "instr0_no_stfle_74", test_user_instr0_no_stfle_74 },
{ "instr0_combined_no_stfle_74", test_instr0_combined_no_stfle_74 },
{ "operexec_combined_no_stfle_74", test_operexec_combined_no_stfle_74 },
{ "operexec_no_stfle_74", test_user_operexec_no_stfle_74 },
};
int main(int argc, char *argv[])
{
int idx;
TEST_REQUIRE(kvm_has_cap(KVM_CAP_S390_USER_INSTR0));
ksft_print_header();
ksft_set_plan(ARRAY_SIZE(testlist));
for (idx = 0; idx < ARRAY_SIZE(testlist); idx++) {
testlist[idx].test();
ksft_test_result_pass("%s\n", testlist[idx].name);
}
ksft_finished();
}
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