s390 architecture · Supported

Maintainers

• M Heiko Carstens <hca@linux.ibm.com>
• M Vasily Gorbik <gor@linux.ibm.com>
• M Alexander Gordeev <agordeev@linux.ibm.com>
• R Christian Borntraeger <borntraeger@linux.ibm.com>
• R Sven Schnelle <svens@linux.ibm.com>

Paths

• F Documentation/driver-api/s390-drivers.rst
• F Documentation/arch/s390/
• F arch/s390/
• F drivers/s390/
• F drivers/watchdog/diag288_wdt.c

Last 30 days

Most active threads (last 7 days)

• WARM1d [PATCH 00/60] KVM Planes + SEV-SNP Support
  2026-06-08 14:43 · 8 replies in 7d · Jörg Rödel <joro@8bytes.org>

Active reviewers (last 30 days)

• Jiri Pirko <hidden>
  2 attestations (2 Tested-by) · last on 2026-06-04
• Carlos López <hidden>
  1 attestation (1 Co-developed-by) · last on 2026-06-08
• Joerg Roedel <hidden>
  1 attestation (1 Co-developed-by) · last on 2026-06-08
• Michael Kelley <hidden>
  1 attestation (1 Tested-by) · last on 2026-06-04
• Mostafa Saleh <smostafa@google.com>
  1 attestation (1 Tested-by) · last on 2026-06-04

Recent patches

Most-recent 30 patches in this subsystem on linuxppc-dev (capped at 30), ordered by date desc.

• WARM1d [PATCH 37/60] kvm: Pass plane_level to kvm_set_routing_entry()
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• WARM1d [PATCH 33/60] KVM: Implement KVM_CREATE_VCPU ioctl for planes
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• WARM1d [PATCH 27/60] kvm: Introduce arch-specific part of struct kvm_vcpu_common
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• WARM1d [PATCH 31/60] kvm: Allocate struct kvm_plane in architecture code
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• WARM1d [PATCH 28/60] kvm: Implement KVM_CAP_PLANES
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• WARM1d [PATCH 26/60] kvm: Introduce arch-specific plane state
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• WARM1d [PATCH 16/60] kvm: Add accessors for kvm_vcpu->mutex
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• WARM1d [PATCH 13/60] kvm: Add read accessors for kvm_vcpu scheduling state
  2026-06-08 · Jörg Rödel <joro@8bytes.org>
• COOLING6d [RFC 08/12] PCI: Add is_sriov bit to struct pci_dev
  2026-06-04 · Dimitri Daskalakis <hidden>
• COOLING6d [RFC 05/12] PCI: Convert s390/pci/pci.c to pci_is_sriov_* helpers
  2026-06-04 · Dimitri Daskalakis <hidden>
• HOTtoday REVIEWED: 3 (1M) [PATCH v6 09/20] dma-direct: make dma_direct_map_phys() honor DMA_ATTR_CC_SHARED
  2026-06-04 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• HOTtoday [PATCH v6 01/20] s390: Expose protected virtualization through cc_platform_has()
  2026-06-04 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• WARM3d REVIEWED: 1 (0M) [PATCH v5 10/20] dma-direct: make dma_direct_map_phys() honor DMA_ATTR_CC_SHARED
  2026-05-22 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• WARM3d [PATCH v5 02/20] [DO NOT MERGE] s390: Expose protected virtualization through cc_platform_has()
  2026-05-22 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• WARM1d [PATCH 09/11] treewide: Convert custom kernel_param_ops .get callbacks to seq_buf via cocci
  2026-05-21 · Kees Cook <kees@kernel.org>
• WARM1d [PATCH 04/11] treewide: Convert struct kernel_param_ops initializers to DEFINE_KERNEL_PARAM_OPS
  2026-05-21 · Kees Cook <kees@kernel.org>
• COLD17d [PATCH v2 54/69] mm/sparse-vmemmap: Drop @pgmap from vmemmap population APIs
  2026-05-13 · Muchun Song <hidden>
• COLD21d [PATCH v4 07/13] dma-direct: make dma_direct_map_phys() honor DMA_ATTR_CC_SHARED
  2026-05-12 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• COLD29d IN MM: 32 (31M) [PATCH v2] drivers/base/memory: make memory block get/put explicit
  2026-05-12 · Muchun Song <hidden>
• COLD30d Re: [PATCH] drivers/base/memory: make memory block get/put explicit
  2026-05-12 · Muchun Song <muchun.song@linux.dev>
• COLD21d IN MM [PATCH 7/8] s390/mm: use free_reserved_page() in vmem_free_pages()
  2026-05-11 · "David Hildenbrand (Arm)" <david@kernel.org>
• COLD30d [PATCH] drivers/base/memory: make memory block get/put explicit
  2026-05-11 · Muchun Song <hidden>
• COOLING9d REVIEWED: 1 (0M) [PATCH 06/15] s390/time: Prepare to stop elapsing in dynticks-idle
  2026-05-08 · Frederic Weisbecker <frederic@kernel.org>
• COLD20d REVIEWED: 5 (1M) [PATCH v2 1/5] mm/filemap: Retry fault by VMA lock if the lock was released for I/O
  2026-04-30 · "Barry Song (Xiaomi)" <baohua@kernel.org>
• COLD23d IN MM: 28 (28M) [PATCH v8 3/6] mm/sparse-vmemmap: Pass @pgmap argument to memory deactivation paths
  2026-04-28 · Muchun Song <hidden>
• COLD43d [RFC PATCH v1 5/9] uaccess: Switch to copy_{to/from}_user_partial() when relevant
  2026-04-27 · "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
• COLD43d [RFC PATCH v1 2/9] uaccess: Convert INLINE_COPY_{TO/FROM}_USER to kconfig and reduce ifdefery
  2026-04-27 · "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
• COLD44d REVIEWED: 28 (28M) [PATCH v7 3/6] mm/sparse-vmemmap: Pass @pgmap argument to memory deactivation paths
  2026-04-26 · Muchun Song <hidden>
• COLD47d REVIEWED: 28 (28M) [PATCH v6 3/7] mm/sparse-vmemmap: Pass @pgmap argument to memory deactivation paths
  2026-04-24 · Muchun Song <hidden>
• COLD49d REVIEWED: 28 (28M) [PATCH v5 v5 3/6] mm/sparse-vmemmap: Pass @pgmap argument to memory deactivation paths
  2026-04-23 · Muchun Song <hidden>

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE131d [PATCH v4 44/54] hypfs: don't pin dentries twice
  2025-11-18 · Al Viro <viro@zeniv.linux.org.uk>
• STALE131d [PATCH v4 45/54] hypfs: switch hypfs_create_str() to returning int
  2025-11-18 · Al Viro <viro@zeniv.linux.org.uk>
• STALE131d [PATCH v4 47/54] convert hypfs
  2025-11-18 · Al Viro <viro@zeniv.linux.org.uk>
• STALE131d [PATCH v4 46/54] hypfs: swich hypfs_create_u64() to returning int
  2025-11-18 · Al Viro <viro@zeniv.linux.org.uk>
• STALE175d [RFC PATCH 2/2] mm/pgtable: convert pgtable_trans_huge_withdraw to ptdesc
  2025-12-14 · alexs@kernel.org
• STALE160d [PATCH 16/28] s390: introduce arch_zone_limits_init()
  2025-12-28 · Mike Rapoport <rppt@kernel.org>
• STALE160d [PATCH 22/28] arch, mm: consolidate initialization of nodes, zones and memory map
  2025-12-28 · Mike Rapoport <rppt@kernel.org>
• STALE160d [PATCH 23/28] arch, mm: consolidate initialization of SPARSE memory model
  2025-12-28 · Mike Rapoport <rppt@kernel.org>
• STALE160d [PATCH 26/28] mm, arch: consolidate hugetlb CMA reservation
  2025-12-28 · Mike Rapoport <rppt@kernel.org>
• STALE111d [PATCH v2 16/28] s390: introduce arch_zone_limits_init()
  2026-01-02 · Mike Rapoport <rppt@kernel.org>