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authorPaolo Bonzini <pbonzini@redhat.com>2020-02-05 16:15:05 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2020-02-05 16:15:05 +0100
commitef09f4f463350ef4c174158648d91bb7ebfd10db (patch)
treead0e1ded865241bacb4c36207fb0c548b368c556 /tools
parentKVM: SVM: relax conditions for allowing MSR_IA32_SPEC_CTRL accesses (diff)
parentselftests: KVM: testing the local IRQs resets (diff)
downloadlinux-dev-ef09f4f463350ef4c174158648d91bb7ebfd10db.tar.xz
linux-dev-ef09f4f463350ef4c174158648d91bb7ebfd10db.zip
Merge tag 'kvm-s390-next-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
KVM: s390: Fixes and cleanups for 5.6 - fix register corruption - ENOTSUPP/EOPNOTSUPP mixed - reset cleanups/fixes - selftests
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/kvm/Makefile1
-rw-r--r--tools/testing/selftests/kvm/include/kvm_util.h6
-rw-r--r--tools/testing/selftests/kvm/lib/kvm_util.c36
-rw-r--r--tools/testing/selftests/kvm/s390x/resets.c197
4 files changed, 240 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 608fa835c764..67abc1dd50ee 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -36,6 +36,7 @@ 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 += s390x/resets
TEST_GEN_PROGS_s390x += dirty_log_test
TEST_GEN_PROGS_s390x += kvm_create_max_vcpus
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 29cccaf96baf..ae0d14c2540a 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -125,6 +125,12 @@ void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
struct kvm_sregs *sregs);
int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
struct kvm_sregs *sregs);
+void vcpu_fpu_get(struct kvm_vm *vm, uint32_t vcpuid,
+ struct kvm_fpu *fpu);
+void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid,
+ struct kvm_fpu *fpu);
+void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
+void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
#ifdef __KVM_HAVE_VCPU_EVENTS
void vcpu_events_get(struct kvm_vm *vm, uint32_t vcpuid,
struct kvm_vcpu_events *events);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 41cf45416060..a6dd0401eb50 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1373,6 +1373,42 @@ int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_sregs *sregs)
return ioctl(vcpu->fd, KVM_SET_SREGS, sregs);
}
+void vcpu_fpu_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_fpu *fpu)
+{
+ int ret;
+
+ ret = _vcpu_ioctl(vm, vcpuid, KVM_GET_FPU, fpu);
+ TEST_ASSERT(ret == 0, "KVM_GET_FPU failed, rc: %i errno: %i (%s)",
+ ret, errno, strerror(errno));
+}
+
+void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_fpu *fpu)
+{
+ int ret;
+
+ ret = _vcpu_ioctl(vm, vcpuid, KVM_SET_FPU, fpu);
+ TEST_ASSERT(ret == 0, "KVM_SET_FPU failed, rc: %i errno: %i (%s)",
+ ret, errno, strerror(errno));
+}
+
+void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg)
+{
+ int ret;
+
+ ret = _vcpu_ioctl(vm, vcpuid, KVM_GET_ONE_REG, reg);
+ TEST_ASSERT(ret == 0, "KVM_GET_ONE_REG failed, rc: %i errno: %i (%s)",
+ ret, errno, strerror(errno));
+}
+
+void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg)
+{
+ int ret;
+
+ ret = _vcpu_ioctl(vm, vcpuid, KVM_SET_ONE_REG, reg);
+ TEST_ASSERT(ret == 0, "KVM_SET_ONE_REG failed, rc: %i errno: %i (%s)",
+ ret, errno, strerror(errno));
+}
+
/*
* VCPU Ioctl
*
diff --git a/tools/testing/selftests/kvm/s390x/resets.c b/tools/testing/selftests/kvm/s390x/resets.c
new file mode 100644
index 000000000000..1485bc6c8999
--- /dev/null
+++ b/tools/testing/selftests/kvm/s390x/resets.c
@@ -0,0 +1,197 @@
+// 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"
+
+#define VCPU_ID 3
+#define LOCAL_IRQS 32
+
+struct kvm_s390_irq buf[VCPU_ID + LOCAL_IRQS];
+
+struct kvm_vm *vm;
+struct kvm_run *run;
+struct kvm_sync_regs *regs;
+static uint64_t regs_null[16];
+
+static uint64_t crs[16] = { 0x40000ULL,
+ 0x42000ULL,
+ 0, 0, 0, 0, 0,
+ 0x43000ULL,
+ 0, 0, 0, 0, 0,
+ 0x44000ULL,
+ 0, 0
+};
+
+static void guest_code_initial(void)
+{
+ /* Round toward 0 */
+ uint32_t fpc = 0x11;
+
+ /* Dirty registers */
+ asm volatile (
+ " lctlg 0,15,%0\n"
+ " sfpc %1\n"
+ : : "Q" (crs), "d" (fpc));
+ GUEST_SYNC(0);
+}
+
+static void test_one_reg(uint64_t id, uint64_t value)
+{
+ struct kvm_one_reg reg;
+ uint64_t eval_reg;
+
+ reg.addr = (uintptr_t)&eval_reg;
+ reg.id = id;
+ vcpu_get_reg(vm, VCPU_ID, &reg);
+ TEST_ASSERT(eval_reg == value, "value == %s", value);
+}
+
+static void assert_noirq(void)
+{
+ struct kvm_s390_irq_state irq_state;
+ int irqs;
+
+ irq_state.len = sizeof(buf);
+ irq_state.buf = (unsigned long)buf;
+ irqs = _vcpu_ioctl(vm, VCPU_ID, 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(void)
+{
+ struct kvm_sregs sregs;
+ struct kvm_regs regs;
+ struct kvm_fpu fpu;
+
+ vcpu_regs_get(vm, VCPU_ID, &regs);
+ TEST_ASSERT(!memcmp(&regs.gprs, regs_null, sizeof(regs.gprs)), "grs == 0");
+
+ vcpu_sregs_get(vm, VCPU_ID, &sregs);
+ TEST_ASSERT(!memcmp(&sregs.acrs, regs_null, sizeof(sregs.acrs)), "acrs == 0");
+
+ vcpu_fpu_get(vm, VCPU_ID, &fpu);
+ TEST_ASSERT(!memcmp(&fpu.fprs, regs_null, sizeof(fpu.fprs)), "fprs == 0");
+}
+
+static void assert_initial(void)
+{
+ struct kvm_sregs sregs;
+ struct kvm_fpu fpu;
+
+ vcpu_sregs_get(vm, VCPU_ID, &sregs);
+ TEST_ASSERT(sregs.crs[0] == 0xE0UL, "cr0 == 0xE0");
+ TEST_ASSERT(sregs.crs[14] == 0xC2000000UL, "cr14 == 0xC2000000");
+ TEST_ASSERT(!memcmp(&sregs.crs[1], regs_null, sizeof(sregs.crs[1]) * 12),
+ "cr1-13 == 0");
+ TEST_ASSERT(sregs.crs[15] == 0, "cr15 == 0");
+
+ vcpu_fpu_get(vm, VCPU_ID, &fpu);
+ TEST_ASSERT(!fpu.fpc, "fpc == 0");
+
+ test_one_reg(KVM_REG_S390_GBEA, 1);
+ test_one_reg(KVM_REG_S390_PP, 0);
+ test_one_reg(KVM_REG_S390_TODPR, 0);
+ test_one_reg(KVM_REG_S390_CPU_TIMER, 0);
+ test_one_reg(KVM_REG_S390_CLOCK_COMP, 0);
+}
+
+static void assert_normal(void)
+{
+ test_one_reg(KVM_REG_S390_PFTOKEN, KVM_S390_PFAULT_TOKEN_INVALID);
+ assert_noirq();
+}
+
+static void inject_irq(int cpu_id)
+{
+ 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 = cpu_id;
+ irqs = _vcpu_ioctl(vm, cpu_id, KVM_S390_SET_IRQ_STATE, &irq_state);
+ TEST_ASSERT(irqs >= 0, "Error injecting EMERGENCY IRQ errno %d\n", errno);
+}
+
+static void test_normal(void)
+{
+ printf("Testing normal reset\n");
+ /* Create VM */
+ vm = vm_create_default(VCPU_ID, 0, guest_code_initial);
+ run = vcpu_state(vm, VCPU_ID);
+ regs = &run->s.regs;
+
+ vcpu_run(vm, VCPU_ID);
+
+ inject_irq(VCPU_ID);
+
+ vcpu_ioctl(vm, VCPU_ID, KVM_S390_NORMAL_RESET, 0);
+ assert_normal();
+ kvm_vm_free(vm);
+}
+
+static void test_initial(void)
+{
+ printf("Testing initial reset\n");
+ vm = vm_create_default(VCPU_ID, 0, guest_code_initial);
+ run = vcpu_state(vm, VCPU_ID);
+ regs = &run->s.regs;
+
+ vcpu_run(vm, VCPU_ID);
+
+ inject_irq(VCPU_ID);
+
+ vcpu_ioctl(vm, VCPU_ID, KVM_S390_INITIAL_RESET, 0);
+ assert_normal();
+ assert_initial();
+ kvm_vm_free(vm);
+}
+
+static void test_clear(void)
+{
+ printf("Testing clear reset\n");
+ vm = vm_create_default(VCPU_ID, 0, guest_code_initial);
+ run = vcpu_state(vm, VCPU_ID);
+ regs = &run->s.regs;
+
+ vcpu_run(vm, VCPU_ID);
+
+ inject_irq(VCPU_ID);
+
+ vcpu_ioctl(vm, VCPU_ID, KVM_S390_CLEAR_RESET, 0);
+ assert_normal();
+ assert_initial();
+ assert_clear();
+ kvm_vm_free(vm);
+}
+
+int main(int argc, char *argv[])
+{
+ setbuf(stdout, NULL); /* Tell stdout not to buffer its content */
+
+ test_initial();
+ if (kvm_check_cap(KVM_CAP_S390_VCPU_RESETS)) {
+ test_normal();
+ test_clear();
+ }
+ return 0;
+}