qemu-kvm/SOURCES/kvm-s390x-Move-clear-reset.patch

147 lines
4.8 KiB
Diff

From f268cc7071ecb4322c03f3183acbcf90421da3c7 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 29 May 2020 05:53:48 -0400
Subject: [PATCH 06/42] s390x: Move clear reset
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Thomas Huth <thuth@redhat.com>
Message-id: <20200529055420.16855-7-thuth@redhat.com>
Patchwork-id: 97019
O-Subject: [RHEL-8.3.0 qemu-kvm PATCH v2 06/38] s390x: Move clear reset
Bugzilla: 1828317
RH-Acked-by: Claudio Imbrenda <cimbrend@redhat.com>
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
From: Janosch Frank <frankja@linux.ibm.com>
Let's also move the clear reset function into the reset handler.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20191127175046.4911-5-frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
(cherry picked from commit eb8adcc3e9e3b8405c104ede72cf9f3bb2a5e226)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
target/s390x/cpu-qom.h | 1 +
target/s390x/cpu.c | 58 +++++++++++++-----------------------------
2 files changed, 18 insertions(+), 41 deletions(-)
diff --git a/target/s390x/cpu-qom.h b/target/s390x/cpu-qom.h
index 6f0a12042e..dbe5346ec9 100644
--- a/target/s390x/cpu-qom.h
+++ b/target/s390x/cpu-qom.h
@@ -37,6 +37,7 @@ typedef struct S390CPUDef S390CPUDef;
typedef enum cpu_reset_type {
S390_CPU_RESET_NORMAL,
S390_CPU_RESET_INITIAL,
+ S390_CPU_RESET_CLEAR,
} cpu_reset_type;
/**
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index ca62fe7685..bd39cb54b7 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -94,6 +94,9 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);
switch (type) {
+ case S390_CPU_RESET_CLEAR:
+ memset(env, 0, offsetof(CPUS390XState, start_initial_reset_fields));
+ /* fall through */
case S390_CPU_RESET_INITIAL:
/* initial reset does not clear everything! */
memset(&env->start_initial_reset_fields, 0,
@@ -107,6 +110,14 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
env->cregs[0] = CR0_RESET;
env->cregs[14] = CR14_RESET;
+#if defined(CONFIG_USER_ONLY)
+ /* user mode should always be allowed to use the full FPU */
+ env->cregs[0] |= CR0_AFP;
+ if (s390_has_feat(S390_FEAT_VECTOR)) {
+ env->cregs[0] |= CR0_VECTOR;
+ }
+#endif
+
/* tininess for underflow is detected before rounding */
set_float_detect_tininess(float_tininess_before_rounding,
&env->fpu_status);
@@ -125,46 +136,6 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
}
}
-/* CPUClass:reset() */
-static void s390_cpu_full_reset(CPUState *s)
-{
- S390CPU *cpu = S390_CPU(s);
- S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
- CPUS390XState *env = &cpu->env;
-
- scc->parent_reset(s);
- cpu->env.sigp_order = 0;
- s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);
-
- memset(env, 0, offsetof(CPUS390XState, end_reset_fields));
-
- /* architectured initial values for CR 0 and 14 */
- env->cregs[0] = CR0_RESET;
- env->cregs[14] = CR14_RESET;
-
-#if defined(CONFIG_USER_ONLY)
- /* user mode should always be allowed to use the full FPU */
- env->cregs[0] |= CR0_AFP;
- if (s390_has_feat(S390_FEAT_VECTOR)) {
- env->cregs[0] |= CR0_VECTOR;
- }
-#endif
-
- /* architectured initial value for Breaking-Event-Address register */
- env->gbea = 1;
-
- env->pfault_token = -1UL;
-
- /* tininess for underflow is detected before rounding */
- set_float_detect_tininess(float_tininess_before_rounding,
- &env->fpu_status);
-
- /* Reset state inside the kernel that we cannot access yet from QEMU. */
- if (kvm_enabled()) {
- kvm_s390_reset_vcpu(cpu);
- }
-}
-
#if !defined(CONFIG_USER_ONLY)
static void s390_cpu_machine_reset_cb(void *opaque)
{
@@ -456,6 +427,11 @@ static Property s390x_cpu_properties[] = {
DEFINE_PROP_END_OF_LIST()
};
+static void s390_cpu_reset_full(CPUState *s)
+{
+ return s390_cpu_reset(s, S390_CPU_RESET_CLEAR);
+}
+
static void s390_cpu_class_init(ObjectClass *oc, void *data)
{
S390CPUClass *scc = S390_CPU_CLASS(oc);
@@ -472,7 +448,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
scc->load_normal = s390_cpu_load_normal;
#endif
scc->reset = s390_cpu_reset;
- cc->reset = s390_cpu_full_reset;
+ cc->reset = s390_cpu_reset_full;
cc->class_by_name = s390_cpu_class_by_name,
cc->has_work = s390_cpu_has_work;
#ifdef CONFIG_TCG
--
2.27.0