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From 65d1d181ba7236d4d537faa545afc6d72c3db091 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Thu, 9 Aug 2018 10:15:09 +0000
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Subject: [PATCH 21/21] s390x/kvm: add etoken facility
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <1533813309-9643-3-git-send-email-thuth@redhat.com>
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Patchwork-id: 81687
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O-Subject: [RHEL-8.0 qemu-kvm PATCH 2/2] s390x/kvm: add etoken facility
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Bugzilla: 1612938
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Jens Freimann <jfreiman@redhat.com>
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Provide the etoken facility. We need to handle cpu model, migration and
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clear reset.
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Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Acked-by: Janosch Frank <frankja@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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---
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 target/s390x/cpu.h              |  3 +++
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 target/s390x/cpu_features.c     |  3 ++-
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 target/s390x/cpu_features_def.h |  3 ++-
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 target/s390x/gen-features.c     |  3 ++-
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 target/s390x/kvm.c              | 11 +++++++++++
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 target/s390x/machine.c          | 20 +++++++++++++++++++-
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 6 files changed, 39 insertions(+), 4 deletions(-)
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diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
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index 3ee40f0..86d08fa 100644
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--- a/target/s390x/cpu.h
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+++ b/target/s390x/cpu.h
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@@ -2,6 +2,7 @@
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  * S/390 virtual CPU header
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  *
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  *  Copyright (c) 2009 Ulrich Hecht
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+ *  Copyright IBM Corp. 2012, 2018
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  *
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  * This library is free software; you can redistribute it and/or
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  * modify it under the terms of the GNU Lesser General Public
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@@ -68,6 +69,8 @@ struct CPUS390XState {
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     uint32_t aregs[16];    /* access registers */
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     uint8_t riccb[64];     /* runtime instrumentation control */
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     uint64_t gscb[4];      /* guarded storage control */
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+    uint64_t etoken;       /* etoken */
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+    uint64_t etoken_extension; /* etoken extension */
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     /* Fields up to this point are not cleared by initial CPU reset */
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     struct {} start_initial_reset_fields;
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diff --git a/target/s390x/cpu_features.c b/target/s390x/cpu_features.c
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index 3b9e274..e05e6aa 100644
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--- a/target/s390x/cpu_features.c
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+++ b/target/s390x/cpu_features.c
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@@ -1,7 +1,7 @@
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 /*
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  * CPU features/facilities for s390x
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  *
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- * Copyright 2016 IBM Corp.
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+ * Copyright IBM Corp. 2016, 2018
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  *
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  * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com>
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  *
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@@ -106,6 +106,7 @@ static const S390FeatDef s390_features[] = {
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     FEAT_INIT("irbm", S390_FEAT_TYPE_STFL, 145, "Insert-reference-bits-multiple facility"),
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     FEAT_INIT("msa8-base", S390_FEAT_TYPE_STFL, 146, "Message-security-assist-extension-8 facility (excluding subfunctions)"),
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     FEAT_INIT("cmmnt", S390_FEAT_TYPE_STFL, 147, "CMM: ESSA-enhancement (no translate) facility"),
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+    FEAT_INIT("etoken", S390_FEAT_TYPE_STFL, 156, "Etoken facility"),
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     /* SCLP SCCB Byte 80 - 98  (bit numbers relative to byte-80) */
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     FEAT_INIT("gsls", S390_FEAT_TYPE_SCLP_CONF_CHAR, 40, "SIE: Guest-storage-limit-suppression facility"),
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diff --git a/target/s390x/cpu_features_def.h b/target/s390x/cpu_features_def.h
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index 7c5915c..ac2c947 100644
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--- a/target/s390x/cpu_features_def.h
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+++ b/target/s390x/cpu_features_def.h
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@@ -1,7 +1,7 @@
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 /*
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  * CPU features/facilities for s390
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  *
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- * Copyright 2016 IBM Corp.
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+ * Copyright IBM Corp. 2016, 2018
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  *
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  * Author(s): Michael Mueller <mimu@linux.vnet.ibm.com>
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  *            David Hildenbrand <dahi@linux.vnet.ibm.com>
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@@ -93,6 +93,7 @@ typedef enum {
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     S390_FEAT_INSERT_REFERENCE_BITS_MULT,
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     S390_FEAT_MSA_EXT_8,
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     S390_FEAT_CMM_NT,
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+    S390_FEAT_ETOKEN,
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     /* Sclp Conf Char */
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     S390_FEAT_SIE_GSLS,
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diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
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index 6626b6f..5af042c 100644
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--- a/target/s390x/gen-features.c
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+++ b/target/s390x/gen-features.c
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@@ -1,7 +1,7 @@
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 /*
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  * S390 feature list generator
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  *
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- * Copyright 2016 IBM Corp.
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+ * Copyright IBM Corp. 2016, 2018
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  *
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  * Author(s): Michael Mueller <mimu@linux.vnet.ibm.com>
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  *            David Hildenbrand <dahi@linux.vnet.ibm.com>
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@@ -471,6 +471,7 @@ static uint16_t full_GEN14_GA1[] = {
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     S390_FEAT_GROUP_MSA_EXT_7,
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     S390_FEAT_GROUP_MSA_EXT_8,
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     S390_FEAT_CMM_NT,
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+    S390_FEAT_ETOKEN,
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     S390_FEAT_HPMA2,
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     S390_FEAT_SIE_KSS,
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     S390_FEAT_GROUP_MULTIPLE_EPOCH_PTFF,
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diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
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index 3474310a9..2a63499 100644
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--- a/target/s390x/kvm.c
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+++ b/target/s390x/kvm.c
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@@ -524,6 +524,12 @@ int kvm_arch_put_registers(CPUState *cs, int level)
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         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_BPBC;
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     }
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+    if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) {
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+        cs->kvm_run->s.regs.etoken = env->etoken;
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+        cs->kvm_run->s.regs.etoken_extension  = env->etoken_extension;
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+        cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ETOKEN;
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+    }
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+
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     /* Finally the prefix */
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     if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {
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         cs->kvm_run->s.regs.prefix = env->psa;
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@@ -638,6 +644,11 @@ int kvm_arch_get_registers(CPUState *cs)
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         env->bpbc = cs->kvm_run->s.regs.bpbc;
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     }
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+    if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) {
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+        env->etoken = cs->kvm_run->s.regs.etoken;
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+        env->etoken_extension = cs->kvm_run->s.regs.etoken_extension;
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+    }
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+
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     /* pfault parameters */
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     if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
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         env->pfault_token = cs->kvm_run->s.regs.pft;
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diff --git a/target/s390x/machine.c b/target/s390x/machine.c
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index 84b4928..8421deb 100644
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--- a/target/s390x/machine.c
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+++ b/target/s390x/machine.c
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@@ -1,7 +1,7 @@
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 /*
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  * S390x machine definitions and functions
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  *
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- * Copyright IBM Corp. 2014
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+ * Copyright IBM Corp. 2014, 2018
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  *
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  * Authors:
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  *   Thomas Huth <thuth@linux.vnet.ibm.com>
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@@ -210,6 +210,23 @@ const VMStateDescription vmstate_bpbc = {
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     }
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 };
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+static bool etoken_needed(void *opaque)
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+{
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+    return s390_has_feat(S390_FEAT_ETOKEN);
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+}
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+
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+const VMStateDescription vmstate_etoken = {
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+    .name = "cpu/etoken",
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+    .version_id = 1,
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+    .minimum_version_id = 1,
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+    .needed = etoken_needed,
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+    .fields = (VMStateField[]) {
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+        VMSTATE_UINT64(env.etoken, S390CPU),
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+        VMSTATE_UINT64(env.etoken_extension, S390CPU),
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+        VMSTATE_END_OF_LIST()
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+    }
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+};
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+
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 const VMStateDescription vmstate_s390_cpu = {
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     .name = "cpu",
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     .post_load = cpu_post_load,
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@@ -245,6 +262,7 @@ const VMStateDescription vmstate_s390_cpu = {
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         &vmstate_exval,
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         &vmstate_gscb,
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         &vmstate_bpbc,
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+        &vmstate_etoken,
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         NULL
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     },
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 };
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-- 
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1.8.3.1
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