From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E63CE374A1D; Mon, 31 Aug 2026 14:48:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788187718; cv=none; b=cAsXTnX+s4oMxSjEGKbL2/rk2qJmj4qn8pKBKz0vp4ERqsN5SVtWo/BV7TU8drAA1qfukmIYbYE3pdU8Oa5GJ1YsSRqEpLsgvndxZdQK+7h5xNclvpWd/nRLCttRfVD4/3W0jyhaJiWDRtwHEEdGL+opCYfH1cLCR6dti5Ih8Rg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788187718; c=relaxed/simple; bh=uAFcd8HQIqh0gz9X0Fd7BXVaB2dY5KFUiz6/VWzDECI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jnXNZ9d68xVZbQSrtlOn4PPPWgVVbKVqAujcYVI3B8TeMSUPW2urtEpZ2rxVb/2EIhp+SOUcVjGgf/9DHFO4zbpZRaT/T+41ya05kgNvCspjkrJFD4LrqEeaP3zfK8gNUAxkdPWJFAugwcGTkl+CukmYesowhHsF37UC6AxJmZs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=WF3oihdM; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="WF3oihdM" Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 67VEZBwB1398300; Mon, 31 Aug 2026 14:48:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=Hkd03Tw3GQhq5aCfJ fTH2yNNeWWRwh+ubgEBypEn00Y=; b=WF3oihdMCht2FvJxrlHga8YU8W8+3SD0i vsNPgGBvlEvi9Cp+C7PMxaxuTWosWA3sZ1tZ6CQ8CCiVqGlpTCApp+mlHa0T02ml v4h7nSe477EF9iKCGCFaUP3/cmO5RMHX9uXp878YDocW0hVfc5akAlvRBps/13p9 cor/tfjai1grkzotHsYWghzvXbfrrpyJj0TSqi812eMgIdj/xZc/SbmdJ8iEfzcP x8bNCkGmCydhWv7oLvVjNTq+Wz930sJp7u++pdK1hNSquN3FlR+5oyVUZH3nQQVd G+5R++WapPOQX/WbIPLNTukH0tnciY7T0aYHCxsr5wYTxVbJnxmgg== Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4gbnudhysc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Aug 2026 14:48:15 +0000 (GMT) Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 67VEfe53029556; Mon, 31 Aug 2026 14:48:14 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 4gccexx7nu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Aug 2026 14:48:14 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 67VEmAgf42926508 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 31 Aug 2026 14:48:10 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5C8462004B; Mon, 31 Aug 2026 14:48:10 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E63D82004F; Mon, 31 Aug 2026 14:48:09 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 31 Aug 2026 14:48:09 +0000 (GMT) From: Steffen Eiden To: kvm@vger.kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Alexander Gordeev , Andreas Grapentin , Arnd Bergmann , Catalin Marinas , Christian Borntraeger , Claudio Imbrenda , David Hildenbrand , Friedrich Welter , Fuad Tabba , Gautam Gala , Hariharan Mari , Heiko Carstens , Hendrik Brueckner , Ilya Leoshkevich , Janosch Frank , Joey Gouly , Marc Zyngier , Nico Boehr , Nina Schoetterl-Glausch , Oliver Upton , Paolo Bonzini , Sean Christopherson , Suzuki K Poulose , Sven Schnelle , Ulrich Weigand , Vasily Gorbik , Will Deacon , Zenghui Yu Subject: [PATCH v7 16/23] KVM: s390: arm64: Introduce host definitions Date: Mon, 31 Aug 2026 16:47:53 +0200 Message-ID: <20260831144802.834315-17-seiden@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260831144802.834315-1-seiden@linux.ibm.com> References: <20260831144802.834315-1-seiden@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: dOXOye89J-4tGjxxIHRLSN1sL3Ey_WZP X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODMxMDEyNSBTYWx0ZWRfX+45iQunjxgxh ODJCEvJWxRkbZ1c2NJJ91i7LVMmRTXOSz7zMQlFEM0tBKC2Qm8nOt+Ue8jYOZi9Ji/J51bLWdHD RY+GZgtQ/Xl2ZuKv4thraMvGAVwbcDd4OdtLCjtVEgkAlVvgAutD/gOB7zioh4xLuu9jMBZYlf2 BciB137T3jSm8QGfwJtihpsDukPNbCYRVW9oYXRAAGo2ccLLOqq9eJQa1OiM502lbXCUTxyr1rL Cbn/Mvq/Mlu/6D93ocUoR0245RGyRVtAzzx0xUvJZ4qFdPoYhc3LDhStZMY1vmU7nhmHtwzrDJx X037CgST1voGIgiA+cYVKJmz3bWVixe2fV4bMm54tibjSQBHAT0euTUHcp7bEh7dhUvxTihYGD3 ttoTtu2GrbW5kc29ZV+6/yGLY7rRb9zYtQjrIslOYv3n4soVwYskyyfXv27p98Y0Hwotr0JgaGV wVBF0Z3yeFsJqK/EO+Q== X-Proofpoint-ORIG-GUID: YFM_mUXa0ArZzfUnEE5hMEgweSV6CH0a X-Proofpoint-Spam-Info: AW1haW4tMjYwODMxMDEyNSBTYWx0ZWRfX6MJCeZJx11Sf ET4+JZ4Y2+wMm269RAHZCf+mKSyWXDYPnOpJympH3ZHZLTVPrcUFTiTGL6KbCD0J/pQmOg3FhP5 njWAabiRDW2NAWCrIm9MmwYERHQ1Zv8= X-Authority-Analysis: v=2.4 cv=B92JFutM c=1 sm=1 tr=0 ts=6a95942f cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=NkYWUXnGwG2_pH3cPtwA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-31_05,2026-08-27_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 spamscore=0 clxscore=1015 suspectscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608310125 Add all basic definitions the arm on s390 KVM host requires. Including, but not limited to, struct kvm*arch definitions, various functions (to be implemented in the following patches), and various defines required to run arm64 guests. Enlighten asm/kvm_host.h for the new header variant. The new header is chosen instead of asm/kvm_host_s390.h if KVM_S390_ARM64 is defined. Co-developed-by: Andreas Grapentin Signed-off-by: Andreas Grapentin Co-developed-by: Nina Schoetterl-Glausch Signed-off-by: Nina Schoetterl-Glausch Signed-off-by: Steffen Eiden --- arch/s390/include/asm/kvm.h | 6 + arch/s390/include/asm/kvm_host.h | 9 ++ arch/s390/include/asm/kvm_host_arm64.h | 211 +++++++++++++++++++++++++ 3 files changed, 226 insertions(+) create mode 100644 arch/s390/include/asm/kvm.h create mode 100644 arch/s390/include/asm/kvm_host_arm64.h diff --git a/arch/s390/include/asm/kvm.h b/arch/s390/include/asm/kvm.h new file mode 100644 index 000000000000..aeb11dc631d5 --- /dev/null +++ b/arch/s390/include/asm/kvm.h @@ -0,0 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifdef KVM_S390_ARM64 +#include +#else +#include +#endif diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 147325978225..cd6d572883ab 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -3,7 +3,16 @@ #ifndef ASM_KVM_HOST_H #define ASM_KVM_HOST_H +#ifdef KVM_S390_ARM64 +#include +#else #include +#endif + +static inline bool kvm_arch_pmi_in_guest(struct kvm_vcpu *vcpu) +{ + return false; +} #define PGM_OPERATION 0x01 #define PGM_PRIVILEGED_OP 0x02 diff --git a/arch/s390/include/asm/kvm_host_arm64.h b/arch/s390/include/asm/kvm_host_arm64.h new file mode 100644 index 000000000000..b8a689c649bd --- /dev/null +++ b/arch/s390/include/asm/kvm_host_arm64.h @@ -0,0 +1,211 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef ASM_KVM_HOST_ARM64_H +#define ASM_KVM_HOST_ARM64_H + +#include + +#include +#include + +#define vcpu_gp_regs(v) ((v)->arch.sae_block.gpr) + +#include +#include + +#include + +#define KVM_HAVE_MMU_RWLOCK +#define KVM_MAX_VCPUS 1 +#define KVM_S390_ARM64_IMPL_FEATURES \ + (BIT(KVM_ARM_VCPU_PTRAUTH_ADDRESS) | BIT(KVM_ARM_VCPU_PTRAUTH_GENERIC)) + +#define KVM_HALT_POLL_NS_DEFAULT 50000 + +#define KVM_S390_MANAGES_S390_GUEST 0 + +/* Minimal (=no) vgic definitions */ +#define KVM_IRQCHIP_NUM_PINS 1 +#define irqchip_in_kernel(_k) false + +#define __ctxt_sys_reg(ctx, reg) NULL +struct kvm_cpu_context { + /* + * These are just for 32 bit, which we don't have, making them RES0. + * They are exposed to user space. + */ + u64 spsr_abt; + u64 spsr_und; + u64 spsr_irq; + u64 spsr_fiq; + + __vector128 __aligned(16) vregs[32]; +}; + +struct kvm_vcpu_arch { + struct kvm_sae_block sae_block; + struct kvm_sae_save_area save_area; + struct kvm_cpu_context ctxt; + + u32 host_acrs[NUM_ACRS]; + + /* Hypervisor Configuration Register */ + u64 hcr_elz; + + /* Configuration flags, set once and for all before the vcpu can run */ + u8 cflags; + + /* Input flags to the hypervisor code, potentially cleared after use */ + u8 iflags; + + /* State flags for kernel bookkeeping, unused by the hypervisor code */ + u8 sflags; + + /* + * Don't run the guest (internal implementation need). + * + * Contrary to the flags above, this is set/cleared outside of + * a vcpu context, and thus cannot be mixed with the flags + * themselves (or the flag accesses need to be made atomic). + */ + bool pause; + + /* vcpu power state */ + struct kvm_mp_state mp_state; + /* lock for mp_state & reset_state.reset */ + spinlock_t mp_state_lock; + + /* vcpu reset state */ + struct vcpu_reset_state reset_state; + + /* GMAP */ + struct gmap *gmap; + struct kvm_s390_mmu_cache *mc; + + void *debugfs_state_data; +}; + +struct kvm_vcpu_stat { + struct kvm_vcpu_stat_generic generic; + /* ARM64 stats */ + u64 hvc_exit_stat; + u64 wfe_exit_stat; + u64 wfi_exit_stat; + u64 mmio_exit_user; + u64 mmio_exit_kernel; + u64 signal_exits; + u64 exits; + /* GMAP stats */ + u64 pfault_sync; +}; + +#define kvm_has_mte(_kvm) false +#define vcpu_has_sve(_vcpu) false +#define vcpu_has_ptrauth(_vcpu) false + +struct kvm_arch_memory_slot { +}; + +struct kvm_arch { + struct gmap *gmap; + u64 guest_phys_size; + + /* VM-wide vCPU feature set */ + unsigned long flags; + + /* Protects VM-scoped configuration data */ + struct mutex config_lock; + + debug_info_t *dbf; + + DECLARE_BITMAP(vcpu_features, KVM_VCPU_MAX_FEATURES); + + unsigned long mem_limit; +}; + +static inline bool __vcpu_has_feature(const struct kvm_arch *ka, int feature) +{ + return test_bit(feature, ka->vcpu_features); +} + +struct kvm_vm_stat { + struct kvm_vm_stat_generic generic; +}; + +static inline bool system_has_full_ptr_auth(void) +{ + return true; +} + +#define kvm_vm_is_protected(_kvm) false +#define vcpu_is_protected(_vcpu) false + +#define vcpu_is_loaded(_vcpu) ((_vcpu)->cpu != -1) + +#define KVM_HVA_ERR_BAD -1UL +#define KVM_HVA_ERR_RO_BAD -2UL + +static inline bool kvm_is_error_hva(unsigned long addr) +{ + return IS_ERR_VALUE(addr); +} + +u32 get_kvm_ipa_limit(void); + +/* unused, but required functions */ +static inline void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) {} +static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {} +static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {} +static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) {} +static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {} +static inline void kvm_arch_sync_events(struct kvm *kvm) {} +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} +static inline void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, + struct kvm_memory_slot *slot, + gfn_t gfn_offset, + unsigned long mask) {} + +int kvm_handle_guest_abort(struct kvm_vcpu *vcpu); +void kvm_reset_vcpu(struct kvm_vcpu *vcpu); + +/* arm64 guests do not use async-pf. Defined because Kbuild requires it as s390 kvm turns it on. */ +#define ASYNC_PF_PER_VCPU 0 +struct kvm_arch_async_pf { + unsigned long pfault_token; +}; + +#define __unsupp_async_call(fn) WARN_ONCE(true, "async not supported on kvm-arm64 %s", fn) + +static inline bool kvm_arch_can_dequeue_async_page_present(struct kvm_vcpu *vcpu) +{ + __unsupp_async_call(__func__); + return false; +}; + +static inline void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, + struct kvm_async_pf *work) +{ + __unsupp_async_call(__func__); +}; + +static inline bool kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, + struct kvm_async_pf *work) +{ + __unsupp_async_call(__func__); + return false; +}; + +static inline void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, + struct kvm_async_pf *work) +{ + __unsupp_async_call(__func__); +}; + +static inline void kvm_arch_async_page_present_queued(struct kvm_vcpu *vcpu) +{ + __unsupp_async_call(__func__); +}; + +#define kvm_supports_32bit_el0() false + +#endif /* ASM_KVM_HOST_ARM64_H */ -- 2.53.0