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Wed, 12 Aug 2026 15:36:36 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 12 Aug 2026 15:36:36 +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 v6 11/33] KVM: arm64: Share arm64 code with s390 Date: Wed, 12 Aug 2026 17:36:07 +0200 Message-ID: <20260812153631.3376090-12-seiden@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260812153631.3376090-1-seiden@linux.ibm.com> References: <20260812153631.3376090-1-seiden@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@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-Spam-Details-Enc: AW1haW4tMjYwODEyMDEyNiBTYWx0ZWRfX1BhaPEZos6ct RO0pbWeTlCzCEUWhgrp9NQxCDaZE9fKXxOZJMX+uzKXnit0Icwob0ca1lCbjr/MPWuTx7ao58P8 thVDmSKJT1ApuShVVAFFUm3TJDVQt5EWoIUFjipW1eJoaWEK0WOAaczYrt9Pk2hn2MQ8zG+fYLA eQaO3nmbzMQJi3DoNVMFJOydU/el8ySSy583jBr+lzoWI+2auyeqZbcxxgKLCA0E7Cxdsbc0lDe VDI4Tr2h/FSnKOrZMY3d248JJGMyWmlzhaXvpQNP8eQMJZ7abr18N9kWq7PcgiczlPh6wNMkMVW sU1SpaNobT7YQzsrEDVEgXSqgvLQOrGHEswjqShFLBi+qE4HrzJDqG4Icjh+ZF0CgBS/F+NtD/O GghaK/wCReYMvhri0l6HYtCelBxg4wR8GbWvvQAdvk+BJy67l1hlTwvZZvXli2QGbDpJKok5XFn VGAma8qh3OR8fn2xnCQ== X-Proofpoint-Spam-Info: AW1haW4tMjYwODEyMDEyNiBTYWx0ZWRfX1yPf6ykDrKjC UKMEtLbIinV58ppVQwtWAkSY/nGJIDQJQprxVjfGfbxLJo49ht+P6uUiOan7b0tbpO4PumbCtZG BNeghFTrZ3LY0rO9V6ju02Panb8mGIs= X-Authority-Analysis: v=2.4 cv=RqD16imK c=1 sm=1 tr=0 ts=6a7c9309 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=DWVxlzv4wnVo_M8M_fcA:9 X-Proofpoint-GUID: RzOi_joBKYaBt7eikWmH33uUyADdeH-G X-Proofpoint-ORIG-GUID: CqTfyBBWehjnw3w_OEzzq3sCLHnrxF-M 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=2026-08-12_04,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 bulkscore=0 malwarescore=0 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608120126 Mark functions that s390 can use to implement arm on s390 as shared functions. No functional change. Signed-off-by: Steffen Eiden --- arch/arm64/kvm/arm.c | 3 +++ arch/arm64/kvm/guest.c | 6 ++++++ arch/arm64/kvm/handle_exit.c | 6 ++++++ arch/arm64/kvm/mmio.c | 2 ++ 4 files changed, 17 insertions(+) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 8b080804bc90..6b92a3c1d490 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1603,6 +1603,7 @@ static unsigned long system_supported_vcpu_features(void) return features; } +#ifdef ARM64_S390_COMMON static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu, const struct kvm_vcpu_init *init) { @@ -1656,6 +1657,8 @@ static bool kvm_vcpu_init_changed(struct kvm_vcpu *vcpu, KVM_VCPU_MAX_FEATURES); } +#endif /* ARM64_S390_COMMON */ + static int kvm_setup_vcpu(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 773f6c8e5026..6ca5a9f357cd 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -62,6 +62,7 @@ const struct kvm_stats_header kvm_vcpu_stats_header = { sizeof(kvm_vcpu_stats_desc), }; +#ifdef ARM64_S390_COMMON static bool core_reg_offset_is_vreg(u64 off) { return off >= KVM_REG_ARM_CORE_REG(fp_regs.vregs) && @@ -306,6 +307,8 @@ static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) return err; } +#endif /* ARM64_S390_COMMON */ + #define vq_word(vq) (((vq) - SVE_VQ_MIN) / 64) #define vq_mask(vq) ((u64)1 << ((vq) - SVE_VQ_MIN) % 64) #define vq_present(vqs, vq) (!!((vqs)[vq_word(vq)] & vq_mask(vq))) @@ -543,6 +546,7 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) return -EINVAL; } +#ifdef ARM64_S390_COMMON static int copy_core_reg_indices(const struct kvm_vcpu *vcpu, u64 __user *uindices) { @@ -591,6 +595,8 @@ static unsigned long num_core_regs(const struct kvm_vcpu *vcpu) return copy_core_reg_indices(vcpu, NULL); } +#endif /* ARM64_S390_COMMON */ + static unsigned long num_sve_regs(const struct kvm_vcpu *vcpu) { const unsigned int slices = vcpu_sve_slices(vcpu); diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 29108e5c0206..6a6ef2c074f4 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -213,6 +213,7 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu) return 0; } +#ifdef ARM64_S390_COMMON static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu) { u64 esr = kvm_vcpu_get_esr(vcpu); @@ -224,6 +225,8 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu) return 1; } +#endif /* ARM64_S390_COMMON */ + /* * Guest access to SVE registers should be routed to this handler only * when the system doesn't support SVE. @@ -404,6 +407,7 @@ static exit_handle_fn arm_exit_handlers[] = { [ESR_ELx_EC_GCS] = kvm_handle_gcs, }; +#ifdef ARM64_S390_COMMON static exit_handle_fn kvm_get_exit_handler(struct kvm_vcpu *vcpu) { u64 esr = kvm_vcpu_get_esr(vcpu); @@ -439,6 +443,8 @@ static int handle_trap_exceptions(struct kvm_vcpu *vcpu) return handled; } +#endif /* ARM64_S390_COMMON */ + /* * Return > 0 to return to guest, < 0 on error, 0 (and set exit_reason) on * proper exit to userspace. diff --git a/arch/arm64/kvm/mmio.c b/arch/arm64/kvm/mmio.c index d1c3a352d5a2..5161102da507 100644 --- a/arch/arm64/kvm/mmio.c +++ b/arch/arm64/kvm/mmio.c @@ -10,6 +10,7 @@ #include "trace.h" +#ifdef ARM64_S390_COMMON void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data) { void *datap = NULL; @@ -258,3 +259,4 @@ int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa) run->exit_reason = KVM_EXIT_MMIO; return 0; } +#endif /* ARM64_S390_COMMON */ -- 2.53.0