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Tue, 28 Apr 2026 16:05:27 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 28 Apr 2026 16:05:27 +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: Andreas Grapentin , Arnd Bergmann , Catalin Marinas , Christian Borntraeger , Claudio Imbrenda , David Hildenbrand , Gautam Gala , Hendrik Brueckner , Janosch Frank , Joey Gouly , Marc Zyngier , Nina Schoetterl-Glausch , Oliver Upton , Paolo Bonzini , Suzuki K Poulose , Ulrich Weigand , Will Deacon , Zenghui Yu Subject: [RFC PATCH v2 00/28] KVM: s390: Introduce arm64 KVM - using symlinks Date: Tue, 28 Apr 2026 18:04:57 +0200 Message-ID: <20260428160527.1378085-1-seiden@linux.ibm.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: _k_e1EFXCh5PugmhUtP8LSK7iZ02ozQa X-Authority-Analysis: v=2.4 cv=Ft81OWrq c=1 sm=1 tr=0 ts=69f0dacd cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=UgY_9lrrsBdwoOJ0i9gA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: _k_e1EFXCh5PugmhUtP8LSK7iZ02ozQa X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDI4MDE1MSBTYWx0ZWRfX0DchNp1VdgtV gkpzIKX3SsN64NbXfY/8TRUuJTN/Y7ZcL2o+ghv6eQmAiHrnPkpUd0+MNWhXinAj13VPOtZDGYv ORyUZ0PQeSvM4k1EuxARfnR9HYI4uldC3YQ217vWTW2QrKnAFnMNpGk8RrD1mxWzoKiIHx608zC A6dEZqmLCeR3XqRjgyui7khac9nkR8KxF6BAA8s11sm2gvlYB8rogP1RRBn3RB0funGKx8mkrCm uYs9EpR3u8mx9hCAVlcZFE+zNWp2Wi1KMcMHB+qH+V8wqcCvZIxUs5QcPm57VMGtZ9KNPu9kRF7 yaWK7hancRVBGWW2Ab2mFznPvt8YGBKEbGb3ymjRD5capfDtLctWK4YVgMDvZVCvSqbmOe0+uuq 3dfhOSMSFQ3/hJMV2xX/Hjd2QLUyv6ZtBGumpW0sxTKgR45377pe7ntMR5UwOvP7xS8tvwUjsYm BtBiriIHbKqrth92Fcw== 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=2026-04-28_05,2026-04-28_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 spamscore=0 impostorscore=0 clxscore=1015 malwarescore=0 phishscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604280151 Hi all, This is a variant of [PATCH v2 00/28] KVM: s390: Introduce arm64 KVM Message-ID: 20260428155622.1361364-1-seiden@linux.ibm.com using symlinks for the arm headers instead of moving them. Thank you Andreas! Beside that, it is the same series. The (range-)diff to the 'original' series is: b is this series. 4: 9b7e04e2b41e ! 4: 49571c6bc977 arm64: Provide arm64 UAPI for other host architectures a => b | 121 ++++++++++++++--------------------------------------------------- 1 file changed, 26 insertions(+), 95 deletions(-) 5: ec761405f6b8 = 5: 2f264e59cf30 arm64: Extract sysreg definitions 6: 204d98beea66 ! 6: 85ad00827e9a arm64: Provide arm64 API for non-native architectures a => b | 169 +++++++++++++++++++++++++++++++++++------------------------------ 1 file changed, 92 insertions(+), 77 deletions(-) 7: 01a6ef0ec29b ! 7: 4e8fa04aabfa KVM: arm64: Provide arm64 KVM API for non-native architectures a => b | 49 +++++++++++++++++++++++++++---------------------- 1 file changed, 27 insertions(+), 22 deletions(-) 8: 4dc45327c239 ! 8: 08fd8c972984 arm64: Extract pstate definitions from ptrace a => b | 222 ++++++++++++++++++++++++++++++++--------------------------------- 1 file changed, 110 insertions(+), 112 deletions(-) 9: ff405f180fb5 = 9: dc86db4b65c6 KVM: arm64: Share kvm_emulate definitions 10: eface4a46adc ! 10: b7543c130090 KVM: arm64: Make some arm64 KVM code shareable a => b | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) What do you think about that? Steffen since v1: - use symlinks for arm headers - moved mispositioned kvm_supports_32bit_el0 from shared to s390 (thanks Marc) - various small issues fixed (non exhaustive) - un-move macros creating arm instructions from sysreg-defs.h back to sysreg.h - reset sp register - use 'a' inline asm modifier for address registers in stiasrm and lasrm - clear x2 after SAE exit - fix unnecessary recompilations of the kvm-arm64 module Hendrik Brueckner (1): s390/hwcaps: Report SAE support as hwcap Nina Schoetterl-Glausch (3): arm64: Extract sysreg definitions arm64: Extract pstate definitions from ptrace KVM: arm64: Share reset general register code Paolo Bonzini (3): VFIO: take reference to the KVM module KVM, vfio: remove symbol_get(kvm_get_kvm_safe) from vfio KVM, vfio: remove symbol_get(kvm_put_kvm) from vfio Steffen Eiden (21): arm64: Provide arm64 UAPI for s390 host architecture arm64: Provide arm64 API for non-native architectures KVM: arm64: Provide arm64 KVM API for non-native architectures KVM: arm64: Share kvm_emulate definitions KVM: arm64: Make some arm64 KVM code shareable KVM: arm64: Access elements of vcpu_gp_regs individually KVM: arm64: Extract & share ipa size shift calculation KVM: s390: arm64: Implement required functions MAINTAINERS: Add Steffen as reviewer for KVM/arm64 KVM: s390: Move s390 kvm code into a subdirectory KVM: S390: Refactor gmap KVM: Make device name configurable KVM: Remove KVM_MMIO as config option KVM: s390: Prepare kvm-s390 for a second kvm module s390: Introduce Start Arm Execution instruction KVM: s390: arm64: Introduce host definitions KVM: s390: Add basic arm64 kvm module KVM: s390: arm64: Implement vm/vcpu create destroy. KVM: s390: arm64: Implement vCPU IOCTLs KVM: s390: arm64: Implement basic page fault handler KVM: s390: arm64: Enable KVM_ARM64 config and Kbuild MAINTAINERS | 5 + arch/arm64/Makefile | 2 + arch/arm64/include/asm/Kbuild | 2 +- arch/arm64/include/asm/brk-imm.h | 6 +- arch/arm64/include/asm/el2_setup.h | 2 +- arch/arm64/include/asm/esr.h | 62 +- arch/arm64/include/asm/hardirq.h | 2 +- arch/arm64/include/asm/kvm_arm.h | 5 +- arch/arm64/include/asm/kvm_emulate.h | 245 +-- arch/arm64/include/asm/kvm_host.h | 200 +- arch/arm64/include/asm/kvm_mmu.h | 41 +- arch/arm64/include/asm/ptrace.h | 34 +- .../include/asm/{sysreg.h => sysreg-defs.h} | 351 +--- arch/arm64/include/asm/sysreg.h | 960 +--------- arch/arm64/include/uapi/asm/kvm.h | 24 +- arch/arm64/include/uapi/asm/pstate.h | 53 + arch/arm64/include/uapi/asm/ptrace.h | 49 +- arch/arm64/include/uapi/linux/kvm.h | 8 + arch/arm64/kernel/head.S | 2 +- arch/arm64/kernel/hyp-stub.S | 2 +- arch/arm64/kernel/traps.c | 53 - arch/arm64/kvm/Kconfig | 1 - arch/arm64/kvm/Makefile | 5 +- arch/arm64/kvm/arm.c | 54 +- arch/arm64/kvm/debug.c | 2 +- arch/arm64/kvm/guest.c | 294 +-- arch/arm64/kvm/handle_exit.c | 52 +- arch/arm64/kvm/hyp/entry.S | 2 +- arch/arm64/kvm/hyp/exception.c | 7 +- arch/arm64/kvm/hyp/hyp-entry.S | 2 +- arch/arm64/kvm/hyp/include/hyp/adjust_pc.h | 17 +- arch/arm64/kvm/hyp/include/hyp/switch.h | 6 +- arch/arm64/kvm/hyp/nvhe/host.S | 2 +- arch/arm64/kvm/hyp/nvhe/hyp-init.S | 2 +- arch/arm64/kvm/mmio.c | 1 + arch/arm64/kvm/mmu.c | 21 +- arch/arm64/kvm/nested.c | 2 +- arch/arm64/kvm/reset.c | 34 +- arch/arm64/kvm/sys_regs.c | 2 +- arch/arm64/kvm/trace_arm.h | 25 - arch/arm64/kvm/vgic/vgic-its.c | 2 +- arch/arm64/kvm/vgic/vgic-mmio-v3.c | 2 +- arch/arm64/kvm/vgic/vgic-v3-nested.c | 2 +- arch/arm64/tools/Makefile | 14 +- arch/arm64/tools/Makefile.sysreg | 12 + arch/arm64/tools/gen-sysreg.awk | 6 +- arch/loongarch/include/asm/kvm_host.h | 2 + arch/loongarch/kvm/Kconfig | 1 - arch/mips/include/asm/kvm_host.h | 2 + arch/mips/kvm/Kconfig | 1 - arch/powerpc/include/asm/kvm_host.h | 7 + arch/powerpc/kvm/Kconfig | 4 - arch/riscv/include/asm/kvm_host.h | 2 + arch/riscv/kvm/Kconfig | 1 - arch/s390/Kconfig | 2 +- arch/s390/boot/ipl_parm.c | 2 +- arch/s390/boot/uv.c | 2 +- arch/s390/configs/debug_defconfig | 2 +- arch/s390/configs/defconfig | 3 +- arch/s390/include/asm/Kbuild | 3 + arch/s390/include/asm/asm-prototypes.h | 1 + arch/s390/include/asm/elf.h | 2 + arch/s390/include/asm/kvm.h | 6 + arch/s390/include/asm/kvm_emulate.h | 135 ++ arch/s390/include/asm/kvm_host.h | 748 +------- arch/s390/include/asm/kvm_host_arm64.h | 202 ++ arch/s390/include/asm/kvm_host_arm64_types.h | 129 ++ .../asm/{kvm_host.h => kvm_host_s390.h} | 19 +- ...kvm_host_types.h => kvm_host_s390_types.h} | 0 arch/s390/include/asm/kvm_mmu.h | 12 + arch/s390/include/asm/kvm_nested.h | 13 + arch/s390/include/asm/sae.h | 39 + arch/s390/include/asm/sclp.h | 5 +- arch/s390/include/asm/stacktrace.h | 5 + arch/s390/include/uapi/arch/arm64/asm/kvm.h | 1 + .../s390/include/uapi/arch/arm64/asm/pstate.h | 1 + .../include/uapi/arch/arm64/asm/sve_context.h | 1 + arch/s390/include/uapi/arch/arm64/linux/kvm.h | 1 + arch/s390/kernel/asm-offsets.c | 3 +- arch/s390/kernel/early.c | 2 +- arch/s390/kernel/entry.S | 35 +- arch/s390/kernel/perf_event.c | 2 +- arch/s390/kernel/processor.c | 3 + arch/s390/kvm/Kconfig | 36 +- arch/s390/kvm/Makefile | 12 +- arch/s390/kvm/arm64/Kconfig | 21 + arch/s390/kvm/arm64/Makefile | 108 ++ arch/s390/kvm/arm64/arm.c | 698 +++++++ arch/s390/kvm/arm64/arm.h | 61 + arch/s390/kvm/arm64/guest.c | 162 ++ arch/s390/kvm/arm64/guest.h | 15 + arch/s390/kvm/arm64/handle_exit.c | 52 + arch/s390/kvm/arm64/inject_fault.c | 21 + arch/s390/kvm/arm64/mmu.c | 178 ++ arch/s390/kvm/arm64/reset.c | 45 + arch/s390/kvm/arm64/reset.h | 11 + arch/s390/kvm/gmap/Makefile | 5 + arch/s390/kvm/{ => gmap}/dat.c | 0 arch/s390/kvm/{ => gmap}/dat.h | 6 +- arch/s390/kvm/{ => gmap}/faultin.c | 11 +- arch/s390/kvm/{ => gmap}/faultin.h | 6 +- arch/s390/kvm/{ => gmap}/gmap.c | 13 +- arch/s390/kvm/{ => gmap}/gmap.h | 17 +- arch/s390/kvm/gmap/mmu.c | 154 ++ arch/s390/kvm/gmap/trace-gmap.h | 59 + arch/s390/kvm/{ => s390}/Kconfig | 26 +- arch/s390/kvm/{ => s390}/Makefile | 10 +- arch/s390/kvm/{ => s390}/diag.c | 2 +- arch/s390/kvm/{ => s390}/gaccess.c | 2 +- arch/s390/kvm/{ => s390}/gaccess.h | 2 +- arch/s390/kvm/{ => s390}/guestdbg.c | 2 +- arch/s390/kvm/{ => s390}/intercept.c | 2 +- arch/s390/kvm/{ => s390}/interrupt.c | 2 +- arch/s390/kvm/{ => s390}/pci.c | 2 +- arch/s390/kvm/{ => s390}/pci.h | 0 arch/s390/kvm/{ => s390}/priv.c | 2 +- arch/s390/kvm/{ => s390}/pv.c | 2 +- arch/s390/kvm/{kvm-s390.c => s390/s390.c} | 126 +- arch/s390/kvm/{kvm-s390.h => s390/s390.h} | 18 +- arch/s390/kvm/{ => s390}/sigp.c | 2 +- arch/s390/kvm/{ => s390}/trace-s390.h | 0 arch/s390/kvm/{ => s390}/trace.h | 14 - arch/s390/kvm/{ => s390}/vsie.c | 2 +- arch/s390/tools/Makefile | 2 + arch/s390/tools/opcodes.txt | 3 + arch/x86/include/asm/kvm_host.h | 2 + arch/x86/kvm/Kconfig | 1 - arch/x86/kvm/mmu/tdp_mmu.c | 2 +- arch/x86/kvm/vmx/nested.h | 4 +- drivers/s390/char/sclp_early.c | 1 + drivers/vfio/device_cdev.c | 2 +- drivers/vfio/group.c | 5 +- drivers/vfio/vfio.h | 15 +- drivers/vfio/vfio_main.c | 51 +- include/arch/arm64/asm/brk-imm.h | 1 + include/arch/arm64/asm/esr.h | 1 + include/arch/arm64/asm/pstate.h | 46 + include/arch/arm64/asm/sysreg-defs.h | 1 + include/kvm/arm64/guest.h | 13 + include/kvm/arm64/handle_exit.h | 14 + include/kvm/arm64/kvm_arm.h | 1 + include/kvm/arm64/kvm_emulate.h | 268 +++ include/kvm/arm64/kvm_host.h | 197 ++ include/kvm/arm64/kvm_mmu.h | 47 + include/kvm/arm64/reset.h | 8 + include/linux/kvm_host.h | 17 +- include/linux/kvm_types.h | 30 + include/linux/vfio.h | 4 +- include/uapi/linux/{kvm.h => kvm-generic.h} | 11 +- include/uapi/linux/kvm.h | 1649 +---------------- usr/include/Makefile | 1 + virt/kvm/Kconfig | 3 - virt/kvm/Makefile.kvm | 3 +- virt/kvm/arm64/Makefile.kvm | 13 + virt/kvm/arm64/arm.c | 75 + virt/kvm/arm64/guest.c | 302 +++ virt/kvm/arm64/handle_exit.c | 54 + virt/kvm/arm64/mmio.c | 1 + virt/kvm/arm64/reset.c | 43 + virt/kvm/arm64/trace.h | 42 + virt/kvm/coalesced_mmio.c | 3 + virt/kvm/coalesced_mmio.h | 2 +- virt/kvm/kvm_main.c | 63 +- virt/kvm/vfio.c | 4 +- 164 files changed, 3865 insertions(+), 5123 deletions(-) copy arch/arm64/include/asm/{sysreg.h => sysreg-defs.h} (79%) create mode 100644 arch/arm64/include/uapi/asm/pstate.h create mode 100644 arch/arm64/include/uapi/linux/kvm.h create mode 100644 arch/arm64/tools/Makefile.sysreg create mode 100644 arch/s390/include/asm/kvm.h create mode 100644 arch/s390/include/asm/kvm_emulate.h create mode 100644 arch/s390/include/asm/kvm_host_arm64.h create mode 100644 arch/s390/include/asm/kvm_host_arm64_types.h copy arch/s390/include/asm/{kvm_host.h => kvm_host_s390.h} (98%) rename arch/s390/include/asm/{kvm_host_types.h => kvm_host_s390_types.h} (100%) create mode 100644 arch/s390/include/asm/kvm_mmu.h create mode 100644 arch/s390/include/asm/kvm_nested.h create mode 100644 arch/s390/include/asm/sae.h create mode 120000 arch/s390/include/uapi/arch/arm64/asm/kvm.h create mode 120000 arch/s390/include/uapi/arch/arm64/asm/pstate.h create mode 120000 arch/s390/include/uapi/arch/arm64/asm/sve_context.h create mode 120000 arch/s390/include/uapi/arch/arm64/linux/kvm.h create mode 100644 arch/s390/kvm/arm64/Kconfig create mode 100644 arch/s390/kvm/arm64/Makefile create mode 100644 arch/s390/kvm/arm64/arm.c create mode 100644 arch/s390/kvm/arm64/arm.h create mode 100644 arch/s390/kvm/arm64/guest.c create mode 100644 arch/s390/kvm/arm64/guest.h create mode 100644 arch/s390/kvm/arm64/handle_exit.c create mode 100644 arch/s390/kvm/arm64/inject_fault.c create mode 100644 arch/s390/kvm/arm64/mmu.c create mode 100644 arch/s390/kvm/arm64/reset.c create mode 100644 arch/s390/kvm/arm64/reset.h create mode 100644 arch/s390/kvm/gmap/Makefile rename arch/s390/kvm/{ => gmap}/dat.c (100%) rename arch/s390/kvm/{ => gmap}/dat.h (99%) rename arch/s390/kvm/{ => gmap}/faultin.c (96%) rename arch/s390/kvm/{ => gmap}/faultin.h (96%) rename arch/s390/kvm/{ => gmap}/gmap.c (99%) rename arch/s390/kvm/{ => gmap}/gmap.h (93%) create mode 100644 arch/s390/kvm/gmap/mmu.c create mode 100644 arch/s390/kvm/gmap/trace-gmap.h copy arch/s390/kvm/{ => s390}/Kconfig (61%) copy arch/s390/kvm/{ => s390}/Makefile (53%) rename arch/s390/kvm/{ => s390}/diag.c (99%) rename arch/s390/kvm/{ => s390}/gaccess.c (99%) rename arch/s390/kvm/{ => s390}/gaccess.h (99%) rename arch/s390/kvm/{ => s390}/guestdbg.c (99%) rename arch/s390/kvm/{ => s390}/intercept.c (99%) rename arch/s390/kvm/{ => s390}/interrupt.c (99%) rename arch/s390/kvm/{ => s390}/pci.c (99%) rename arch/s390/kvm/{ => s390}/pci.h (100%) rename arch/s390/kvm/{ => s390}/priv.c (99%) rename arch/s390/kvm/{ => s390}/pv.c (99%) rename arch/s390/kvm/{kvm-s390.c => s390/s390.c} (98%) rename arch/s390/kvm/{kvm-s390.h => s390/s390.h} (97%) rename arch/s390/kvm/{ => s390}/sigp.c (99%) rename arch/s390/kvm/{ => s390}/trace-s390.h (100%) rename arch/s390/kvm/{ => s390}/trace.h (97%) rename arch/s390/kvm/{ => s390}/vsie.c (99%) create mode 120000 include/arch/arm64/asm/brk-imm.h create mode 120000 include/arch/arm64/asm/esr.h create mode 100644 include/arch/arm64/asm/pstate.h create mode 120000 include/arch/arm64/asm/sysreg-defs.h create mode 100644 include/kvm/arm64/guest.h create mode 100644 include/kvm/arm64/handle_exit.h create mode 120000 include/kvm/arm64/kvm_arm.h create mode 100644 include/kvm/arm64/kvm_emulate.h create mode 100644 include/kvm/arm64/kvm_host.h create mode 100644 include/kvm/arm64/kvm_mmu.h create mode 100644 include/kvm/arm64/reset.h copy include/uapi/linux/{kvm.h => kvm-generic.h} (99%) create mode 100644 virt/kvm/arm64/Makefile.kvm create mode 100644 virt/kvm/arm64/arm.c create mode 100644 virt/kvm/arm64/guest.c create mode 100644 virt/kvm/arm64/handle_exit.c create mode 120000 virt/kvm/arm64/mmio.c create mode 100644 virt/kvm/arm64/reset.c create mode 100644 virt/kvm/arm64/trace.h base-commit: 7f87a5ea75f011d2c9bc8ac0167e5e2d1adb1594 -- 2.51.0