hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

KVM: selftests: Add a test for the KVM_S390_MEM_OP ioctl 

Check that we can write and read the guest memory with this s390x
ioctl, and that some error cases are handled correctly.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Link: https://lkml.kernel.org/r/20190829130732.580-1-thuth@redhat.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Thomas Huth 2019-08-29 15:07:32 +02:00 committed by Christian Borntraeger
parent b4d863c302
commit be6f55a60d
2 changed files with 167 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/kvm/Makefile
View File

@ -32,6 +32,7 @@ TEST_GEN_PROGS_aarch64 += clear_dirty_log_test
TEST_GEN_PROGS_aarch64 += dirty_log_test
TEST_GEN_PROGS_aarch64 += kvm_create_max_vcpus
TEST_GEN_PROGS_s390x = s390x/memop
TEST_GEN_PROGS_s390x += s390x/sync_regs_test
TEST_GEN_PROGS_s390x += dirty_log_test
TEST_GEN_PROGS_s390x += kvm_create_max_vcpus

166
tools/testing/selftests/kvm/s390x/memop.c Normal file
View File

@ -0,0 +1,166 @@
// 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 "test_util.h"
#include "kvm_util.h"
#define VCPU_ID 1
static uint8_t mem1[65536];
static uint8_t mem2[65536];
static void guest_code(void)
{
int i;
for (;;) {
for (i = 0; i < sizeof(mem2); i++)
mem2[i] = mem1[i];
GUEST_SYNC(0);
}
}
int main(int argc, char *argv[])
{
struct kvm_vm *vm;
struct kvm_run *run;
struct kvm_s390_mem_op ksmo;
int rv, i, maxsize;
setbuf(stdout, NULL); /* Tell stdout not to buffer its content */
maxsize = kvm_check_cap(KVM_CAP_S390_MEM_OP);
if (!maxsize) {
fprintf(stderr, "CAP_S390_MEM_OP not supported -> skip test\n");
exit(KSFT_SKIP);
}
if (maxsize > sizeof(mem1))
maxsize = sizeof(mem1);
/* Create VM */
vm = vm_create_default(VCPU_ID, 0, guest_code);
run = vcpu_state(vm, VCPU_ID);
for (i = 0; i < sizeof(mem1); i++)
mem1[i] = i * i + i;
/* Set the first array */
ksmo.gaddr = addr_gva2gpa(vm, (uintptr_t)mem1);
ksmo.flags = 0;
ksmo.size = maxsize;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
/* Let the guest code copy the first array to the second */
vcpu_run(vm, VCPU_ID);
TEST_ASSERT(run->exit_reason == KVM_EXIT_S390_SIEIC,
"Unexpected exit reason: %u (%s)\n",
run->exit_reason,
exit_reason_str(run->exit_reason));
memset(mem2, 0xaa, sizeof(mem2));
/* Get the second array */
ksmo.gaddr = (uintptr_t)mem2;
ksmo.flags = 0;
ksmo.size = maxsize;
ksmo.op = KVM_S390_MEMOP_LOGICAL_READ;
ksmo.buf = (uintptr_t)mem2;
ksmo.ar = 0;
vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(!memcmp(mem1, mem2, maxsize),
"Memory contents do not match!");
/* Check error conditions - first bad size: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
ksmo.size = -1;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == E2BIG, "ioctl allows insane sizes");
/* Zero size: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
ksmo.size = 0;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && (errno == EINVAL || errno == ENOMEM),
"ioctl allows 0 as size");
/* Bad flags: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = -1;
ksmo.size = maxsize;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows all flags");
/* Bad operation: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
ksmo.size = maxsize;
ksmo.op = -1;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows bad operations");
/* Bad guest address: */
ksmo.gaddr = ~0xfffUL;
ksmo.flags = KVM_S390_MEMOP_F_CHECK_ONLY;
ksmo.size = maxsize;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 0;
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv > 0, "ioctl does not report bad guest memory access");
/* Bad host address: */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
ksmo.size = maxsize;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = 0;
ksmo.ar = 0;
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EFAULT,
"ioctl does not report bad host memory address");
/* Bad access register: */
run->psw_mask &= ~(3UL << (63 - 17));
run->psw_mask |= 1UL << (63 - 17); /* Enable AR mode */
vcpu_run(vm, VCPU_ID); /* To sync new state to SIE block */
ksmo.gaddr = (uintptr_t)mem1;
ksmo.flags = 0;
ksmo.size = maxsize;
ksmo.op = KVM_S390_MEMOP_LOGICAL_WRITE;
ksmo.buf = (uintptr_t)mem1;
ksmo.ar = 17;
rv = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_MEM_OP, &ksmo);
TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows ARs > 15");
run->psw_mask &= ~(3UL << (63 - 17)); /* Disable AR mode */
vcpu_run(vm, VCPU_ID); /* Run to sync new state */
kvm_vm_free(vm);
return 0;
}