From 65d1d181ba7236d4d537faa545afc6d72c3db091 Mon Sep 17 00:00:00 2001

From: Thomas Huth <thuth@redhat.com>

Date: Thu, 9 Aug 2018 10:15:09 +0000

Subject: [PATCH 21/21] s390x/kvm: add etoken facility

RH-Author: Thomas Huth <thuth@redhat.com>

Message-id: <1533813309-9643-3-git-send-email-thuth@redhat.com>

Patchwork-id: 81687

O-Subject: [RHEL-8.0 qemu-kvm PATCH 2/2] s390x/kvm: add etoken facility

Bugzilla: 1612938

RH-Acked-by: David Hildenbrand <david@redhat.com>

RH-Acked-by: Cornelia Huck <cohuck@redhat.com>

RH-Acked-by: Jens Freimann <jfreiman@redhat.com>

Provide the etoken facility. We need to handle cpu model, migration and

clear reset.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

Acked-by: Janosch Frank <frankja@linux.ibm.com>

Signed-off-by: Thomas Huth <thuth@redhat.com>

---

 target/s390x/cpu.h              |  3 +++

 target/s390x/cpu_features.c     |  3 ++-

 target/s390x/cpu_features_def.h |  3 ++-

 target/s390x/gen-features.c     |  3 ++-

 target/s390x/kvm.c              | 11 +++++++++++

 target/s390x/machine.c          | 20 +++++++++++++++++++-

 6 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h

index 3ee40f0..86d08fa 100644

--- a/target/s390x/cpu.h

+++ b/target/s390x/cpu.h

@@ -2,6 +2,7 @@

  * S/390 virtual CPU header

  *

  *  Copyright (c) 2009 Ulrich Hecht

+ *  Copyright IBM Corp. 2012, 2018

  *

  * This library is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public

@@ -68,6 +69,8 @@ struct CPUS390XState {

     uint32_t aregs[16];    /* access registers */

     uint8_t riccb[64];     /* runtime instrumentation control */

     uint64_t gscb[4];      /* guarded storage control */

+    uint64_t etoken;       /* etoken */

+    uint64_t etoken_extension; /* etoken extension */

     /* Fields up to this point are not cleared by initial CPU reset */

     struct {} start_initial_reset_fields;

diff --git a/target/s390x/cpu_features.c b/target/s390x/cpu_features.c

index 3b9e274..e05e6aa 100644

--- a/target/s390x/cpu_features.c

+++ b/target/s390x/cpu_features.c

@@ -1,7 +1,7 @@

 /*

  * CPU features/facilities for s390x

  *

- * Copyright 2016 IBM Corp.

+ * Copyright IBM Corp. 2016, 2018

  *

  * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com>

  *

@@ -106,6 +106,7 @@ static const S390FeatDef s390_features[] = {

     FEAT_INIT("irbm", S390_FEAT_TYPE_STFL, 145, "Insert-reference-bits-multiple facility"),

     FEAT_INIT("msa8-base", S390_FEAT_TYPE_STFL, 146, "Message-security-assist-extension-8 facility (excluding subfunctions)"),

     FEAT_INIT("cmmnt", S390_FEAT_TYPE_STFL, 147, "CMM: ESSA-enhancement (no translate) facility"),

+    FEAT_INIT("etoken", S390_FEAT_TYPE_STFL, 156, "Etoken facility"),

     /* SCLP SCCB Byte 80 - 98  (bit numbers relative to byte-80) */

     FEAT_INIT("gsls", S390_FEAT_TYPE_SCLP_CONF_CHAR, 40, "SIE: Guest-storage-limit-suppression facility"),

diff --git a/target/s390x/cpu_features_def.h b/target/s390x/cpu_features_def.h

index 7c5915c..ac2c947 100644

--- a/target/s390x/cpu_features_def.h

+++ b/target/s390x/cpu_features_def.h

@@ -1,7 +1,7 @@

 /*

  * CPU features/facilities for s390

  *

- * Copyright 2016 IBM Corp.

+ * Copyright IBM Corp. 2016, 2018

  *

  * Author(s): Michael Mueller <mimu@linux.vnet.ibm.com>

  *            David Hildenbrand <dahi@linux.vnet.ibm.com>

@@ -93,6 +93,7 @@ typedef enum {

     S390_FEAT_INSERT_REFERENCE_BITS_MULT,

     S390_FEAT_MSA_EXT_8,

     S390_FEAT_CMM_NT,

+    S390_FEAT_ETOKEN,

     /* Sclp Conf Char */

     S390_FEAT_SIE_GSLS,

diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c

index 6626b6f..5af042c 100644

--- a/target/s390x/gen-features.c

+++ b/target/s390x/gen-features.c

@@ -1,7 +1,7 @@

 /*

  * S390 feature list generator

  *

- * Copyright 2016 IBM Corp.

+ * Copyright IBM Corp. 2016, 2018

  *

  * Author(s): Michael Mueller <mimu@linux.vnet.ibm.com>

  *            David Hildenbrand <dahi@linux.vnet.ibm.com>

@@ -471,6 +471,7 @@ static uint16_t full_GEN14_GA1[] = {

     S390_FEAT_GROUP_MSA_EXT_7,

     S390_FEAT_GROUP_MSA_EXT_8,

     S390_FEAT_CMM_NT,

+    S390_FEAT_ETOKEN,

     S390_FEAT_HPMA2,

     S390_FEAT_SIE_KSS,

     S390_FEAT_GROUP_MULTIPLE_EPOCH_PTFF,

diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c

index 3474310a9..2a63499 100644

--- a/target/s390x/kvm.c

+++ b/target/s390x/kvm.c

@@ -524,6 +524,12 @@ int kvm_arch_put_registers(CPUState *cs, int level)

         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_BPBC;

     }

+    if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) {

+        cs->kvm_run->s.regs.etoken = env->etoken;

+        cs->kvm_run->s.regs.etoken_extension  = env->etoken_extension;

+        cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ETOKEN;

+    }

+

     /* Finally the prefix */

     if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {

         cs->kvm_run->s.regs.prefix = env->psa;

@@ -638,6 +644,11 @@ int kvm_arch_get_registers(CPUState *cs)

         env->bpbc = cs->kvm_run->s.regs.bpbc;

     }

+    if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) {

+        env->etoken = cs->kvm_run->s.regs.etoken;

+        env->etoken_extension = cs->kvm_run->s.regs.etoken_extension;

+    }

+

     /* pfault parameters */

     if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {

         env->pfault_token = cs->kvm_run->s.regs.pft;

diff --git a/target/s390x/machine.c b/target/s390x/machine.c

index 84b4928..8421deb 100644

--- a/target/s390x/machine.c

+++ b/target/s390x/machine.c

@@ -1,7 +1,7 @@

 /*

  * S390x machine definitions and functions

  *

- * Copyright IBM Corp. 2014

+ * Copyright IBM Corp. 2014, 2018

  *

  * Authors:

  *   Thomas Huth <thuth@linux.vnet.ibm.com>

@@ -210,6 +210,23 @@ const VMStateDescription vmstate_bpbc = {

     }

 };

+static bool etoken_needed(void *opaque)

+{

+    return s390_has_feat(S390_FEAT_ETOKEN);

+}

+

+const VMStateDescription vmstate_etoken = {

+    .name = "cpu/etoken",

+    .version_id = 1,

+    .minimum_version_id = 1,

+    .needed = etoken_needed,

+    .fields = (VMStateField[]) {

+        VMSTATE_UINT64(env.etoken, S390CPU),

+        VMSTATE_UINT64(env.etoken_extension, S390CPU),

+        VMSTATE_END_OF_LIST()

+    }

+};

+

 const VMStateDescription vmstate_s390_cpu = {

     .name = "cpu",

     .post_load = cpu_post_load,

@@ -245,6 +262,7 @@ const VMStateDescription vmstate_s390_cpu = {

         &vmstate_exval,

         &vmstate_gscb,

         &vmstate_bpbc,

+        &vmstate_etoken,

         NULL

     },

 };

-- 

1.8.3.1