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Tsirkin" , Cornelia Huck , Paolo Bonzini , Hendrik Brueckner , kvm@vger.kernel.org, Christoph Schlameuss X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=899; i=schlameuss@linux.ibm.com; h=from:subject:message-id; bh=aguW8fYG0qpSz/k+6lHIr+3GbPHh6X/lMXQp85Z0fSg=; b=owGbwMvMwCUmoqVx+bqN+mXG02pJDJmHNroy3pqQPdFTWPvH00eaYs7Wcg/YFYU8/KaJLO02e mH78FFgRykLgxgXg6yYIku1uHVeVV/r0jkHLa/BzGFlAhnCwMUpABNpLmJk2Hzp6N3S5dN/WTBK Hc/3nrw0rtxKvbj2lN7KnWZb1wq6/WL4nzf93mehWdfPdi/viLv67vPrbo0k76WJvJfy3R32VH6 awAIA X-Developer-Key: i=schlameuss@linux.ibm.com; a=openpgp; fpr=0E34A68642574B2253AF4D31EEED6AB388551EC3 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: dHEQX7RCwiJGkPrO79YzfWpn4Uya3J6q X-Proofpoint-ORIG-GUID: dHEQX7RCwiJGkPrO79YzfWpn4Uya3J6q X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI0MDExOSBTYWx0ZWRfX/JkWA0XBAdF6 FfKhvYQVApuiUuvKk0NHiF5jm8iiZmUb8MZOFxs6V3QI8Oyx2z2hgrZjmpJ9Ry5vBQCwy7Rm4HV IKUrNARFwiYHmRIfYkjPL9qEZ7Xps82+XyGdLPHQlXA2nvJUMw4GNgEfnM+3xjDlWsUoUJS1/HN YV9vdWyr+nz04SLD3gCclbG4HjYgc3tjmMGnfRRQTUNqIbExKdf7Ir/HfP6sG1VnHLoFuhcN+hJ 931oI33d6ivLeqDM0/BZAxuT5eVPuNv/M8edWs0xNuwQZpC6Ri1flbTmSsam2NOfnUI2PIC95xD FgdWoB6Z2DGm8qWY/UFV2VpMl3/5iXfrzNgHZeBNdNOCFNCzMrJ6TGURnlOw8njSuoc65P7CWZq VaKlXt41klMk5owDYDLm0JnXEGRI8Y7Z3uxOlCk1pURd9SQYslXuVP1ZBJ+VINLFsEPiIWE7vzc APAgWm/990jES3XfFSg== X-Authority-Analysis: v=2.4 cv=KbXfcAYD c=1 sm=1 tr=0 ts=69c2b14c cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=owZ0ccYYszmCy-IndPwA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-24_03,2026-03-23_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 lowpriorityscore=0 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603240119 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=148.163.158.5; envelope-from=schlameuss@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: qemu development 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: 1774367132938158500 Need KVM_S390_VM_CPU_FEAT_ASTFLEIE2 specifically. Signed-off-by: Christoph Schlameuss --- To merge this this needs to be changed to a proper update of the linux-headers once the kernel change is upstream. For now only include the needed change here. --- linux-headers/asm-s390/kvm.h | 1 + 1 file changed, 1 insertion(+) diff --git a/linux-headers/asm-s390/kvm.h b/linux-headers/asm-s390/kvm.h index ab5a6bce590c722452dac5aeb476bd1969d2235b..45a6d0a7406a3f1b71026c49e00= ac25a6fc620ef 100644 --- a/linux-headers/asm-s390/kvm.h +++ b/linux-headers/asm-s390/kvm.h @@ -444,6 +444,7 @@ struct kvm_s390_vm_cpu_machine { #define KVM_S390_VM_CPU_FEAT_PFMFI 11 #define KVM_S390_VM_CPU_FEAT_SIGPIF 12 #define KVM_S390_VM_CPU_FEAT_KSS 13 +#define KVM_S390_VM_CPU_FEAT_ASTFLEIE2 14 struct kvm_s390_vm_cpu_feat { __u64 feat[16]; }; --=20 2.53.0 From nobody Sun Apr 5 16:31:17 2026 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=1774367104; 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Tue, 24 Mar 2026 15:44:07 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=DOvoxt /dv8MUFgtQa8JC8Zxbpi/ZvyJVq94Iqcmyp7w=; b=bdSZ5hqqzjrs+NqA8QnFJM 70WWgE9EAu9csdSp9lw67bHWwAB7Oecm7E+N403pa1DGjunJ9z9AcgO/a1YgYuI0 FHbUoPR8Pxyg/r8PQwlgS9dFplenAVKjLUVdHNO3oC9bOM3bH0bxAR7zxGJ6JhR9 GEn/5E/YqO0IgVraOZXY55vTigsDfhQqbDLCfLt0ASs1c/Tvj8CDjtgq8U/VkGJV IymxewDikjvN4+gUhIpUFhXXgtt95fdkQKIlaPicy8WJ7Gwc+IUDxlHPoMj/Dmzx SzX4vhmARg16ijk0apMMXmxkKjlEdz3sUmz4ZIh1Jw+u40xngORuCQ560pkWbk9g == From: Christoph Schlameuss Date: Tue, 24 Mar 2026 16:43:45 +0100 Subject: [PATCH v2 2/2] s390x/kvm: Add ASTFLE facility 2 for nested virtualization MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260324-astfleie2-v2-2-13008712da00@linux.ibm.com> References: <20260324-astfleie2-v2-0-13008712da00@linux.ibm.com> In-Reply-To: <20260324-astfleie2-v2-0-13008712da00@linux.ibm.com> To: qemu-s390x@nongnu.org Cc: qemu-devel@nongnu.org, Halil Pasic , Christian Borntraeger , Eric Farman , Matthew Rosato , Richard Henderson , Ilya Leoshkevich , Thomas Huth , "Michael S. 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If the host does have the ASTFLE Interpretive Execution Facility 2 the guest can enable the ASTFLE format 2 for its guests. Signed-off-by: Christoph Schlameuss Reviewed-by: Nina Schoetterl-Glausch --- hw/s390x/sclp.c | 2 ++ include/hw/s390x/sclp.h | 4 +++- target/s390x/cpu_features.c | 3 +++ target/s390x/cpu_features.h | 1 + target/s390x/cpu_features_def.h.inc | 3 +++ target/s390x/cpu_models.c | 2 ++ target/s390x/gen-features.c | 1 + target/s390x/kvm/kvm.c | 1 + 8 files changed, 16 insertions(+), 1 deletion(-) diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c index b9c3983df195c4130ad91e06d05c43afc6f5d9d2..2d2cde7803ff45f531047944a15= 308d4077eda3a 100644 --- a/hw/s390x/sclp.c +++ b/hw/s390x/sclp.c @@ -146,6 +146,8 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb) if (s390_has_feat(S390_FEAT_EXTENDED_LENGTH_SCCB)) { s390_get_feat_block(S390_FEAT_TYPE_SCLP_FAC134, &read_info->fac134); + s390_get_feat_block(S390_FEAT_TYPE_SCLP_FAC139, + &read_info->fac139); } =20 read_info->facilities =3D cpu_to_be64(SCLP_HAS_CPU_INFO | diff --git a/include/hw/s390x/sclp.h b/include/hw/s390x/sclp.h index ddc61f1c21480824971888207c4ffbfb381b464b..e1f9b0f6bc10d4b2157da2e5fc8= f85f8f755efb3 100644 --- a/include/hw/s390x/sclp.h +++ b/include/hw/s390x/sclp.h @@ -136,7 +136,9 @@ typedef struct ReadInfo { uint32_t hmfai; uint8_t _reserved7[134 - 128]; /* 128-133 */ uint8_t fac134; - uint8_t _reserved8[144 - 135]; /* 135-143 */ + uint8_t _reserved8[139 - 135]; /* 135-138 */ + uint8_t fac139; + uint8_t _reserved9[144 - 140]; /* 140-143 */ struct CPUEntry entries[]; /* * When the Extended-Length SCCB (ELS) feature is enabled the diff --git a/target/s390x/cpu_features.c b/target/s390x/cpu_features.c index 4b5be6798ef5460c71aa0f2567ebeb0aeb9551da..896914888aa98938f4e1984cec5= 99c5f823b0d9a 100644 --- a/target/s390x/cpu_features.c +++ b/target/s390x/cpu_features.c @@ -148,6 +148,9 @@ void s390_fill_feat_block(const S390FeatBitmap features= , S390FeatType type, case S390_FEAT_TYPE_SCLP_FAC134: clear_be_bit(s390_feat_def(S390_FEAT_DIAG_318)->bit, data); break; + case S390_FEAT_TYPE_SCLP_FAC139: + clear_be_bit(s390_feat_def(S390_FEAT_SIE_ASTFLEIE2)->bit, data); + break; default: return; } diff --git a/target/s390x/cpu_features.h b/target/s390x/cpu_features.h index 5635839d032900089515a440bedb0aca6139a41a..52a82da751ec5ac10fc738121ea= 28a095c08e8c4 100644 --- a/target/s390x/cpu_features.h +++ b/target/s390x/cpu_features.h @@ -24,6 +24,7 @@ typedef enum { S390_FEAT_TYPE_SCLP_CONF_CHAR, S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT, S390_FEAT_TYPE_SCLP_FAC134, + S390_FEAT_TYPE_SCLP_FAC139, S390_FEAT_TYPE_SCLP_CPU, S390_FEAT_TYPE_MISC, S390_FEAT_TYPE_PLO, diff --git a/target/s390x/cpu_features_def.h.inc b/target/s390x/cpu_feature= s_def.h.inc index c017bffcdc4d6fb14855ceaf1e47a2c58865befd..a822f0f2fe99239fe8051f54db4= 9773d73d20996 100644 --- a/target/s390x/cpu_features_def.h.inc +++ b/target/s390x/cpu_features_def.h.inc @@ -139,6 +139,9 @@ DEF_FEAT(SIE_IBS, "ibs", SCLP_CONF_CHAR_EXT, 10, "SIE: = Interlock-and-broadcast-s /* Features exposed via SCLP SCCB Facilities byte 134 (bit numbers relativ= e to byte-134) */ DEF_FEAT(DIAG_318, "diag318", SCLP_FAC134, 0, "Control program name and ve= rsion codes") =20 +/* Features exposed via SCLP SCCB Facilities byte 139 (bit numbers relativ= e to byte-139) */ +DEF_FEAT(SIE_ASTFLEIE2, "astfleie2", SCLP_FAC139, 1, "SIE: ASTFLE interpre= tation execution facility 2") + /* Features exposed via SCLP CPU info. */ DEF_FEAT(SIE_F2, "sief2", SCLP_CPU, 4, "SIE: interception format 2 (Virtua= l SIE)") DEF_FEAT(SIE_SKEY, "skey", SCLP_CPU, 5, "SIE: Storage-key facility") diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c index 954a7a99a9e9b79dfb48639993055a10f8f281d8..128f6643ea235a4ab43834b7044= 929de885a7fab 100644 --- a/target/s390x/cpu_models.c +++ b/target/s390x/cpu_models.c @@ -263,6 +263,7 @@ bool s390_has_feat(S390Feat feat) case S390_FEAT_SIE_PFMFI: case S390_FEAT_SIE_IBS: case S390_FEAT_CONFIGURATION_TOPOLOGY: + case S390_FEAT_SIE_ASTFLEIE2: return false; break; default: @@ -553,6 +554,7 @@ static void check_consistency(const S390CPUModel *model) { S390_FEAT_PLO_QSTG, S390_FEAT_PLO_EXT }, { S390_FEAT_PLO_QSTX, S390_FEAT_PLO_EXT }, { S390_FEAT_PLO_QSTO, S390_FEAT_PLO_EXT }, + { S390_FEAT_SIE_ASTFLEIE2, S390_FEAT_STFLE }, }; int i; =20 diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index 8218e6470ec9c8c5eaa3eb7c56f04ee44e8b7ea0..a309dc2c09ab0abc7cbea32d207= ce3e1c2fa195e 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -720,6 +720,7 @@ static uint16_t full_GEN16_GA1[] =3D { S390_FEAT_PAIE, S390_FEAT_UV_FEAT_AP, S390_FEAT_UV_FEAT_AP_INTR, + S390_FEAT_SIE_ASTFLEIE2, }; =20 static uint16_t full_GEN17_GA1[] =3D { diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 54d28e37d4dda8e341675e6bbaf5cc74ca80f45f..a4733365db3702ea17719a68cef= d6fd85d2c8633 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2305,6 +2305,7 @@ static int kvm_to_feat[][2] =3D { { KVM_S390_VM_CPU_FEAT_PFMFI, S390_FEAT_SIE_PFMFI}, { KVM_S390_VM_CPU_FEAT_SIGPIF, S390_FEAT_SIE_SIGPIF}, { KVM_S390_VM_CPU_FEAT_KSS, S390_FEAT_SIE_KSS}, + { KVM_S390_VM_CPU_FEAT_ASTFLEIE2, S390_FEAT_SIE_ASTFLEIE2 }, }; =20 static int query_cpu_feat(S390FeatBitmap features) --=20 2.53.0