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b=VvMbHSRDy4C48XqUMq0X66ZS5aSGG8l6rMLlyfFluHQvvMwrR9puN4DYq3u2qu1OXgWe hOVISPIXN66kQ9RAp+p2nNCnj/sZcfWmJBGAhci4oNvSpemDULMr4gQrKTtdxB/47MUQ +ZwHWumTnoz0aVPQLZZxLHDqkPjBeYPXVpY6Hxd8/vCB33pg5bLZJc+fvKBi5exhHqYJ wACIa4sfSahuyPCWD7q3qpuClRWUmyyz6TwJXJbisWb28+bS8laMXN1rYJYeMiudsj70 DftrAKmE02JWf6PrPUKfAOvUUeYbfx+SLYU35ocObUss2Mle7n5/k8DGA9bzLgMECJyF fQ== From: Steffen Eiden To: qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: Janosch Frank , Thomas Huth , David Hildenbrand , Michael Mueller , Marc Hartmayer , Christian Borntraeger Subject: [PATCH v2 1/3] linux-headers: update asm-s390/kvm.h Date: Thu, 10 Aug 2023 14:47:17 +0200 Message-Id: <20230810124719.2167260-2-seiden@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230810124719.2167260-1-seiden@linux.ibm.com> References: <20230810124719.2167260-1-seiden@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: tSz1H6dJYdO_EaYnBgvN80oHQbZvXtOH X-Proofpoint-ORIG-GUID: khAbxkAEYmIw9ZS4BqvJVIjOygSJ8pU6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-10_10,2023-08-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 spamscore=0 clxscore=1015 suspectscore=0 malwarescore=0 mlxscore=0 phishscore=0 mlxlogscore=999 adultscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308100106 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=seiden@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1691671728634100001 Content-Type: text/plain; charset="utf-8" Signed-off-by: Steffen Eiden --- linux-headers/asm-s390/kvm.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/linux-headers/asm-s390/kvm.h b/linux-headers/asm-s390/kvm.h index e2afd95420..023a2763a9 100644 --- a/linux-headers/asm-s390/kvm.h +++ b/linux-headers/asm-s390/kvm.h @@ -159,6 +159,22 @@ struct kvm_s390_vm_cpu_subfunc { __u8 reserved[1728]; }; =20 +#define KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST 6 +#define KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST 7 + +#define KVM_S390_VM_CPU_UV_FEAT_NR_BITS 64 +struct kvm_s390_vm_cpu_uv_feat { + union { + struct { + __u64 : 4; + __u64 ap : 1; /* bit 4 */ + __u64 ap_intr : 1; /* bit 5 */ + __u64 : 58; + }; + __u64 feat; + }; +}; + /* kvm attributes for crypto */ #define KVM_S390_VM_CRYPTO_ENABLE_AES_KW 0 #define KVM_S390_VM_CRYPTO_ENABLE_DEA_KW 1 --=20 2.40.1 From nobody Wed May 15 20:04:39 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1691671698; cv=none; d=zohomail.com; s=zohoarc; b=nRSDoYYLSucUA6wjtzaJZMgEjZOPPuBpErWePfGOJgAzXr0mlpSN1ygUy0lO4zNRjqA/wX2nlq3xKA9cDsZMkLt1/wqgwOefBo4QliRYt47wL53VoqVYTem1lCoA1zRHBqY5gdDTYMjVEOUGKvKYoTvXIw1Athwg0cDLYjWCCUA= ARC-Message-Signature: i=1; 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Thu, 10 Aug 2023 12:47:19 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=Dbl5e9By7wFoeBzMHQw/0uc9N/WWJJUlKQF146dWnbA=; b=PladOix7mhcRRR5Hk/j5ssf5KWCgZ01H/brhqNK4CNqyhPFv3zO5dUFlFjZkhAYuNpll 0EQJdJG56FNriP9hdkunsQmzM+i1ObbUTdrVQGBJyZ88JZvLyRKA6ZA1hn9LwSrqOVsy XH5i+mW6fm6oTZ1mQoLW83OXFYXTTGCDQ+e6OWxcjYuONQ1v/3YBvHNbsE3gMlKoCvsw MV4zRRmmPajFMbLxuOjGEA/QCgRDtrV6s761T3TpgHV64G+mJ9X59qXLqE06RCMi3MBT ltOYgGpufEBPt/skA/sJ69Wd8dUA5NL6evSxtUnk6NIhQ+YmtVoKYdVP+OveyaJq0EUK Hw== From: Steffen Eiden To: qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: Janosch Frank , Thomas Huth , David Hildenbrand , Michael Mueller , Marc Hartmayer , Christian Borntraeger Subject: [PATCH v2 2/3] target/s390x/kvm: Refactor AP functionalities Date: Thu, 10 Aug 2023 14:47:18 +0200 Message-Id: <20230810124719.2167260-3-seiden@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230810124719.2167260-1-seiden@linux.ibm.com> References: <20230810124719.2167260-1-seiden@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: SqWrWZgMIT1xg193n5g-c-QKygHntd53 X-Proofpoint-ORIG-GUID: _iDmsv17Qdg-GOkTgOQ-dtiGdqABT5DD X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-10_10,2023-08-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 mlxlogscore=999 clxscore=1015 mlxscore=0 spamscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308100106 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=seiden@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1691671699406100001 Content-Type: text/plain; charset="utf-8" kvm_s390_set_attr() is a misleading name as it only sets attributes for the KVM_S390_VM_CRYPTO group. Therefore, rename it to kvm_s390_set_crypto_attr(). Add new functions ap_available() and ap_enabled() to avoid code duplication later. Signed-off-by: Steffen Eiden Reviewed-by: Michael Mueller --- target/s390x/kvm/kvm.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index a9e5880349..a7e2cdf668 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -250,7 +250,7 @@ static void kvm_s390_enable_cmma(void) trace_kvm_enable_cmma(rc); } =20 -static void kvm_s390_set_attr(uint64_t attr) +static void kvm_s390_set_crypto_attr(uint64_t attr) { struct kvm_device_attr attribute =3D { .group =3D KVM_S390_VM_CRYPTO, @@ -275,7 +275,7 @@ static void kvm_s390_init_aes_kw(void) } =20 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { - kvm_s390_set_attr(attr); + kvm_s390_set_crypto_attr(attr); } } =20 @@ -289,7 +289,7 @@ static void kvm_s390_init_dea_kw(void) } =20 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { - kvm_s390_set_attr(attr); + kvm_s390_set_crypto_attr(attr); } } =20 @@ -2296,6 +2296,17 @@ static int configure_cpu_subfunc(const S390FeatBitma= p features) return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); } =20 +static bool ap_available(void) +{ + return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, + KVM_S390_VM_CRYPTO_ENABLE_APIE); +} + +static bool ap_enabled(const S390FeatBitmap features) +{ + return test_bit(S390_FEAT_AP, features); +} + static int kvm_to_feat[][2] =3D { { KVM_S390_VM_CPU_FEAT_ESOP, S390_FEAT_ESOP }, { KVM_S390_VM_CPU_FEAT_SIEF2, S390_FEAT_SIE_F2 }, @@ -2475,8 +2486,7 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model,= Error **errp) return; } /* for now, we can only provide the AP feature with HW support */ - if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, - KVM_S390_VM_CRYPTO_ENABLE_APIE)) { + if (ap_available()) { set_bit(S390_FEAT_AP, model->features); } =20 @@ -2502,7 +2512,7 @@ static void kvm_s390_configure_apie(bool interpret) KVM_S390_VM_CRYPTO_DISABLE_APIE; =20 if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) { - kvm_s390_set_attr(attr); + kvm_s390_set_crypto_attr(attr); } } =20 @@ -2556,7 +2566,7 @@ void kvm_s390_apply_cpu_model(const S390CPUModel *mod= el, Error **errp) kvm_s390_enable_cmma(); } =20 - if (test_bit(S390_FEAT_AP, model->features)) { + if (ap_enabled(model->features)) { kvm_s390_configure_apie(true); } } --=20 2.40.1 From nobody Wed May 15 20:04:39 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1691671709; cv=none; d=zohomail.com; s=zohoarc; b=EHCFYikqE+k+VUL/IgyXLjzACJTxjfEFaU+rvkzGkJflX/OCJPD9FGm/elTAi9dRScG/vO5iqC9RoMJKIEusCLrtCUUSeviUzAmmMA8Kge1uI6fV1TWNR+M/6Qnja+lFJdyHa2fwA6w1Wndx6xfSuM2GQd6WA75u/+k6LqfY7F8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1691671709; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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Thu, 10 Aug 2023 12:47:19 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=g06oV7B9yyB59BYQ33KFJlu2dJh6t51Y+NZt33IGor4=; b=TJQjT+YlOq8qxOseaarLLMD7D1fymSTZeg5t+LWPh0x2jyu8RmpPM0APsMY6HdwdgmC2 sKkr3nU1+KXiXKADNlmvrhOLckLazv60iw7cbpl6uANYEDuoNcnxsuuDXf4HThPDH0RU aonzJOaeXp+20G4arqGgcr+9ZJ70I7X/SMaz2QGcg4koBJgEUNhtrqistTl3D4wnpLQ5 l4HjN3Bic+lmRXRa9TPHaw5GMUColba0XejQI18UMUf0X12ZwmlU5huW6mvB6Dgapuys 4/okwZU7FZqFxeINQqHNtS+pVP03RWlmI6nFT1Hv3J8AZOch5xGvBx9VneBS9sHkNPTR uQ== From: Steffen Eiden To: qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: Janosch Frank , Thomas Huth , David Hildenbrand , Michael Mueller , Marc Hartmayer , Christian Borntraeger Subject: [PATCH v2 3/3] target/s390x: AP-passthrough for PV guests Date: Thu, 10 Aug 2023 14:47:19 +0200 Message-Id: <20230810124719.2167260-4-seiden@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230810124719.2167260-1-seiden@linux.ibm.com> References: <20230810124719.2167260-1-seiden@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: npIcFQjRq8KS9EulL5pp2sPCiJF2nqJ5 X-Proofpoint-ORIG-GUID: h5QzXXOYHoQVxF93x4MlcdAYZg9UxDpq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-10_10,2023-08-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 mlxscore=0 suspectscore=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 adultscore=0 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308100106 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=seiden@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1691671711462100003 Content-Type: text/plain; charset="utf-8" Enabling AP-passthrough(AP-pt) for PV-guest by using the new CPU features for PV-AP-pt of KVM. As usual QEMU first checks which CPU features are available and then sets them if available and selected by user. An additional check is done to verify that PV-AP can only be enabled if "regular" AP-pt is enabled as well. Note that KVM itself does not enforce this restriction. Signed-off-by: Steffen Eiden --- target/s390x/cpu_features.h | 1 + target/s390x/cpu_features_def.h.inc | 4 ++ target/s390x/cpu_models.c | 2 + target/s390x/gen-features.c | 2 + target/s390x/kvm/kvm.c | 73 +++++++++++++++++++++++++++++ 5 files changed, 82 insertions(+) diff --git a/target/s390x/cpu_features.h b/target/s390x/cpu_features.h index 87463f064d..40928c60e9 100644 --- a/target/s390x/cpu_features.h +++ b/target/s390x/cpu_features.h @@ -43,6 +43,7 @@ typedef enum { S390_FEAT_TYPE_KDSA, S390_FEAT_TYPE_SORTL, S390_FEAT_TYPE_DFLTCC, + S390_FEAT_TYPE_UV_CALL, } S390FeatType; =20 /* Definition of a CPU feature */ diff --git a/target/s390x/cpu_features_def.h.inc b/target/s390x/cpu_feature= s_def.h.inc index e3cfe63735..9a2c5a9dfc 100644 --- a/target/s390x/cpu_features_def.h.inc +++ b/target/s390x/cpu_features_def.h.inc @@ -379,3 +379,7 @@ DEF_FEAT(DEFLATE_GHDT, "dfltcc-gdht", DFLTCC, 1, "DFLTC= C GDHT") DEF_FEAT(DEFLATE_CMPR, "dfltcc-cmpr", DFLTCC, 2, "DFLTCC CMPR") DEF_FEAT(DEFLATE_XPND, "dfltcc-xpnd", DFLTCC, 4, "DFLTCC XPND") DEF_FEAT(DEFLATE_F0, "dfltcc-f0", DFLTCC, 192, "DFLTCC format 0 parameter-= block") + +/* Features exposed via the UV-CALL instruction */ +DEF_FEAT(UV_CALL_AP, "appv", UV_CALL, 4, "AP instructions installed for se= cure guests") +DEF_FEAT(UV_CALL_AP_INTR, "appvi", UV_CALL, 5, "AP instructions interpreta= tion for secure guests") diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c index 42b52afdb4..a7900a8a5c 100644 --- a/target/s390x/cpu_models.c +++ b/target/s390x/cpu_models.c @@ -483,6 +483,8 @@ static void check_consistency(const S390CPUModel *model) { S390_FEAT_DIAG_318, S390_FEAT_EXTENDED_LENGTH_SCCB }, { S390_FEAT_NNPA, S390_FEAT_VECTOR }, { S390_FEAT_RDP, S390_FEAT_LOCAL_TLB_CLEARING }, + { S390_FEAT_UV_CALL_AP, S390_FEAT_AP }, + { S390_FEAT_UV_CALL_AP_INTR, S390_FEAT_UV_CALL_AP }, }; int i; =20 diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index 1e3b7c0dc9..6ae10a2cd8 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -576,6 +576,8 @@ static uint16_t full_GEN16_GA1[] =3D { S390_FEAT_RDP, S390_FEAT_PAI, S390_FEAT_PAIE, + S390_FEAT_UV_CALL_AP, + S390_FEAT_UV_CALL_AP_INTR, }; =20 =20 diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index a7e2cdf668..500b9d894d 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2307,6 +2307,42 @@ static bool ap_enabled(const S390FeatBitmap features) return test_bit(S390_FEAT_AP, features); } =20 +static bool uv_feat_supported(void) +{ + return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL, + KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST); +} + +static int query_uv_feat_guest(S390FeatBitmap features) +{ + struct kvm_s390_vm_cpu_uv_feat prop =3D {}; + struct kvm_device_attr attr =3D { + .group =3D KVM_S390_VM_CPU_MODEL, + .attr =3D KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST, + .addr =3D (uint64_t) &prop, + }; + int rc; + + if (!uv_feat_supported()) { + return 0; + } + + rc =3D kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); + if (rc) { + return rc; + } + + if (ap_available()) { + if (prop.ap) { + set_bit(S390_FEAT_UV_CALL_AP, features); + } + if (prop.ap_intr) { + set_bit(S390_FEAT_UV_CALL_AP_INTR, features); + } + } + return 0; +} + static int kvm_to_feat[][2] =3D { { KVM_S390_VM_CPU_FEAT_ESOP, S390_FEAT_ESOP }, { KVM_S390_VM_CPU_FEAT_SIEF2, S390_FEAT_SIE_F2 }, @@ -2501,11 +2537,41 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *mode= l, Error **errp) set_bit(S390_FEAT_DIAG_318, model->features); } =20 + /* Test for Ultravisor features that influence secure guest behavior */ + query_uv_feat_guest(model->features); + /* strip of features that are not part of the maximum model */ bitmap_and(model->features, model->features, model->def->full_feat, S390_FEAT_MAX); } =20 +static int configure_uv_feat_guest(const S390FeatBitmap features, + bool interpret) +{ + + struct kvm_s390_vm_cpu_uv_feat uv_feat =3D {}; + struct kvm_device_attr attribute =3D { + .group =3D KVM_S390_VM_CPU_MODEL, + .attr =3D KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST, + .addr =3D (__u64) &uv_feat, + }; + + if (!uv_feat_supported()) { + return 0; + } + + if (ap_enabled(features)) { + if (test_bit(S390_FEAT_UV_CALL_AP, features)) { + uv_feat.ap =3D 1; + } + if (test_bit(S390_FEAT_UV_CALL_AP_INTR, features) && interpret) { + uv_feat.ap_intr =3D 1; + } + } + + return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); +} + static void kvm_s390_configure_apie(bool interpret) { uint64_t attr =3D interpret ? KVM_S390_VM_CRYPTO_ENABLE_APIE : @@ -2569,6 +2635,13 @@ void kvm_s390_apply_cpu_model(const S390CPUModel *mo= del, Error **errp) if (ap_enabled(model->features)) { kvm_s390_configure_apie(true); } + + /* configure UV-features for the guest indicated via query / test_bit = */ + rc =3D configure_uv_feat_guest(model->features, true); + if (rc) { + error_setg(errp, "KVM: Error configuring CPU UV features %d", rc); + return; + } } =20 void kvm_s390_restart_interrupt(S390CPU *cpu) --=20 2.40.1