241 lines
6.2 KiB
C
241 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Test for s390x KVM_CAP_SYNC_REGS
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*
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* Based on the same test for x86:
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* Copyright (C) 2018, Google LLC.
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*
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* Adaptions for s390x:
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* Copyright (C) 2019, Red Hat, Inc.
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*
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* Test expected behavior of the KVM_CAP_SYNC_REGS functionality.
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*/
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#define _GNU_SOURCE /* for program_invocation_short_name */
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include "test_util.h"
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#include "kvm_util.h"
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#include "diag318_test_handler.h"
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#include "kselftest.h"
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static void guest_code(void)
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{
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/*
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* We embed diag 501 here instead of doing a ucall to avoid that
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* the compiler has messed with r11 at the time of the ucall.
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*/
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asm volatile (
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"0: diag 0,0,0x501\n"
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" ahi 11,1\n"
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" j 0b\n"
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);
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}
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#define REG_COMPARE(reg) \
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TEST_ASSERT(left->reg == right->reg, \
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"Register " #reg \
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" values did not match: 0x%llx, 0x%llx\n", \
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left->reg, right->reg)
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#define REG_COMPARE32(reg) \
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TEST_ASSERT(left->reg == right->reg, \
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"Register " #reg \
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" values did not match: 0x%x, 0x%x\n", \
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left->reg, right->reg)
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static void compare_regs(struct kvm_regs *left, struct kvm_sync_regs *right)
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{
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int i;
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for (i = 0; i < 16; i++)
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REG_COMPARE(gprs[i]);
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}
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static void compare_sregs(struct kvm_sregs *left, struct kvm_sync_regs *right)
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{
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int i;
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for (i = 0; i < 16; i++)
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REG_COMPARE32(acrs[i]);
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for (i = 0; i < 16; i++)
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REG_COMPARE(crs[i]);
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}
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#undef REG_COMPARE
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#define TEST_SYNC_FIELDS (KVM_SYNC_GPRS|KVM_SYNC_ACRS|KVM_SYNC_CRS|KVM_SYNC_DIAG318)
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#define INVALID_SYNC_FIELD 0x80000000
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void test_read_invalid(struct kvm_vcpu *vcpu)
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{
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struct kvm_run *run = vcpu->run;
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int rv;
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/* Request reading invalid register set from VCPU. */
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run->kvm_valid_regs = INVALID_SYNC_FIELD;
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rv = _vcpu_run(vcpu);
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TEST_ASSERT(rv < 0 && errno == EINVAL,
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"Invalid kvm_valid_regs did not cause expected KVM_RUN error: %d\n",
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rv);
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run->kvm_valid_regs = 0;
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run->kvm_valid_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS;
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rv = _vcpu_run(vcpu);
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TEST_ASSERT(rv < 0 && errno == EINVAL,
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"Invalid kvm_valid_regs did not cause expected KVM_RUN error: %d\n",
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rv);
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run->kvm_valid_regs = 0;
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}
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void test_set_invalid(struct kvm_vcpu *vcpu)
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{
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struct kvm_run *run = vcpu->run;
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int rv;
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/* Request setting invalid register set into VCPU. */
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run->kvm_dirty_regs = INVALID_SYNC_FIELD;
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rv = _vcpu_run(vcpu);
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TEST_ASSERT(rv < 0 && errno == EINVAL,
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"Invalid kvm_dirty_regs did not cause expected KVM_RUN error: %d\n",
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rv);
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run->kvm_dirty_regs = 0;
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run->kvm_dirty_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS;
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rv = _vcpu_run(vcpu);
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TEST_ASSERT(rv < 0 && errno == EINVAL,
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"Invalid kvm_dirty_regs did not cause expected KVM_RUN error: %d\n",
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rv);
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run->kvm_dirty_regs = 0;
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}
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void test_req_and_verify_all_valid_regs(struct kvm_vcpu *vcpu)
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{
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struct kvm_run *run = vcpu->run;
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struct kvm_sregs sregs;
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struct kvm_regs regs;
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int rv;
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/* Request and verify all valid register sets. */
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run->kvm_valid_regs = TEST_SYNC_FIELDS;
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rv = _vcpu_run(vcpu);
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TEST_ASSERT(rv == 0, "vcpu_run failed: %d\n", rv);
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
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TEST_ASSERT(run->s390_sieic.icptcode == 4 &&
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(run->s390_sieic.ipa >> 8) == 0x83 &&
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(run->s390_sieic.ipb >> 16) == 0x501,
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"Unexpected interception code: ic=%u, ipa=0x%x, ipb=0x%x\n",
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run->s390_sieic.icptcode, run->s390_sieic.ipa,
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run->s390_sieic.ipb);
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vcpu_regs_get(vcpu, ®s);
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compare_regs(®s, &run->s.regs);
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vcpu_sregs_get(vcpu, &sregs);
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compare_sregs(&sregs, &run->s.regs);
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}
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void test_set_and_verify_various_reg_values(struct kvm_vcpu *vcpu)
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{
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struct kvm_run *run = vcpu->run;
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struct kvm_sregs sregs;
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struct kvm_regs regs;
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int rv;
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/* Set and verify various register values */
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run->s.regs.gprs[11] = 0xBAD1DEA;
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run->s.regs.acrs[0] = 1 << 11;
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run->kvm_valid_regs = TEST_SYNC_FIELDS;
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run->kvm_dirty_regs = KVM_SYNC_GPRS | KVM_SYNC_ACRS;
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if (get_diag318_info() > 0) {
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run->s.regs.diag318 = get_diag318_info();
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run->kvm_dirty_regs |= KVM_SYNC_DIAG318;
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}
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rv = _vcpu_run(vcpu);
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TEST_ASSERT(rv == 0, "vcpu_run failed: %d\n", rv);
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
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TEST_ASSERT(run->s.regs.gprs[11] == 0xBAD1DEA + 1,
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"r11 sync regs value incorrect 0x%llx.",
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run->s.regs.gprs[11]);
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TEST_ASSERT(run->s.regs.acrs[0] == 1 << 11,
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"acr0 sync regs value incorrect 0x%x.",
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run->s.regs.acrs[0]);
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TEST_ASSERT(run->s.regs.diag318 == get_diag318_info(),
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"diag318 sync regs value incorrect 0x%llx.",
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run->s.regs.diag318);
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vcpu_regs_get(vcpu, ®s);
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compare_regs(®s, &run->s.regs);
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vcpu_sregs_get(vcpu, &sregs);
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compare_sregs(&sregs, &run->s.regs);
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}
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void test_clear_kvm_dirty_regs_bits(struct kvm_vcpu *vcpu)
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{
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struct kvm_run *run = vcpu->run;
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int rv;
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/* Clear kvm_dirty_regs bits, verify new s.regs values are
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* overwritten with existing guest values.
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*/
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run->kvm_valid_regs = TEST_SYNC_FIELDS;
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run->kvm_dirty_regs = 0;
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run->s.regs.gprs[11] = 0xDEADBEEF;
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run->s.regs.diag318 = 0x4B1D;
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rv = _vcpu_run(vcpu);
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TEST_ASSERT(rv == 0, "vcpu_run failed: %d\n", rv);
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_S390_SIEIC);
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TEST_ASSERT(run->s.regs.gprs[11] != 0xDEADBEEF,
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"r11 sync regs value incorrect 0x%llx.",
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run->s.regs.gprs[11]);
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TEST_ASSERT(run->s.regs.diag318 != 0x4B1D,
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"diag318 sync regs value incorrect 0x%llx.",
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run->s.regs.diag318);
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}
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struct testdef {
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const char *name;
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void (*test)(struct kvm_vcpu *vcpu);
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} testlist[] = {
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{ "read invalid", test_read_invalid },
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{ "set invalid", test_set_invalid },
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{ "request+verify all valid regs", test_req_and_verify_all_valid_regs },
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{ "set+verify various regs", test_set_and_verify_various_reg_values },
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{ "clear kvm_dirty_regs bits", test_clear_kvm_dirty_regs_bits },
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};
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int main(int argc, char *argv[])
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{
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struct kvm_vcpu *vcpu;
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struct kvm_vm *vm;
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int idx;
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TEST_REQUIRE(kvm_has_cap(KVM_CAP_SYNC_REGS));
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ksft_print_header();
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ksft_set_plan(ARRAY_SIZE(testlist));
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/* Create VM */
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vm = vm_create_with_one_vcpu(&vcpu, guest_code);
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for (idx = 0; idx < ARRAY_SIZE(testlist); idx++) {
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testlist[idx].test(vcpu);
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ksft_test_result_pass("%s\n", testlist[idx].name);
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}
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kvm_vm_free(vm);
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ksft_finished(); /* Print results and exit() accordingly */
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}
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