[GIT PULL] KVM/riscv changes for 7.1

[Anup Patel]

Hi Paolo,

We have the following KVM RISC-V changes for 7.1:
1) Fixes for issues in steal time accounting, vector and
    PMU which were discovered by KVM API fuzzing
2) Split huge pages during fault handling for dirty logging
    so that write permission is restored for smaller pages
3) Improve kvm_arch_vcpu_load() performance by skipping
    CSR restore if VCPU is reloaded on the same core
4) Implement kvm_arch_has_default_irqchip() for KVM selftests
5) Support configuration of per-VM HGATP mode from KVM
    user space
6) Some more preparatory changes for nested virtualization
    such as:
    6.1) Factored-out ISA checks into separate sources
    6.2) Added hideleg to struct kvm_vcpu_config
    6.3) Factored-out VCPU config into separate sources

Please pull.

Regards,
Anup

The following changes since commit c369299895a591d96745d6492d4888259b004a9e:

  Linux 7.0-rc5 (2026-03-22 14:42:17 -0700)

are available in the Git repository at:

  https://github.com/kvm-riscv/linux.git tags/kvm-riscv-7.1-1

for you to fetch changes up to ddbf9c76c4020bf63a0799b00faad40caa3de6c2:

  RISC-V: KVM: Fix shift-out-of-bounds in make_xfence_request()
(2026-04-06 09:43:02 +0530)

----------------------------------------------------------------
KVM/riscv changes for 7.1

 - Fix steal time shared memory alignment checks
 - Fix vector context allocation leak
 - Fix array out-of-bounds in pmu_ctr_read() and pmu_fw_ctr_read_hi()
 - Fix double-free of sdata in kvm_pmu_clear_snapshot_area()
 - Fix integer overflow in kvm_pmu_validate_counter_mask()
 - Fix shift-out-of-bounds in make_xfence_request()
 - Fix lost write protection on huge pages during dirty logging
 - Split huge pages during fault handling for dirty logging
 - Skip CSR restore if VCPU is reloaded on the same core
 - Implement kvm_arch_has_default_irqchip() for KVM selftests
 - Factored-out ISA checks into separate sources
 - Added hideleg to struct kvm_vcpu_config
 - Factored-out VCPU config into separate sources
 - Support configuration of per-VM HGATP mode from KVM user space

----------------------------------------------------------------
Anup Patel (6):
      RISC-V: KVM: Introduce common kvm_riscv_isa_check_host()
      RISC-V: KVM: Factor-out ISA checks into separate sources
      RISC-V: KVM: Move timer state defines closer to struct in UAPI header
      RISC-V: KVM: Add hideleg to struct kvm_vcpu_config
      RISC-V: KVM: Factor-out VCPU config into separate sources
      RISC-V: KVM: Don't check hstateen0 when updating sstateen0 CSR

Fangyu Yu (3):
      RISC-V: KVM: Support runtime configuration for per-VM's HGATP mode
      RISC-V: KVM: Cache gstage pgd_levels in struct kvm_gstage
      RISC-V: KVM: Reuse KVM_CAP_VM_GPA_BITS to select HGATP.MODE

Jiakai Xu (8):
      RISC-V: KVM: Validate SBI STA shmem alignment in kvm_sbi_ext_sta_set_reg()
      KVM: selftests: Refactor UAPI tests into dedicated function
      RISC-V: KVM: selftests: Add RISC-V SBI STA shmem alignment tests
      RISC-V: KVM: Fix array out-of-bounds in pmu_ctr_read() and
pmu_fw_ctr_read_hi()
      RISC-V: KVM: selftests: Fix firmware counter read in sbi_pmu_test
      RISC-V: KVM: Fix double-free of sdata in kvm_pmu_clear_snapshot_area()
      RISC-V: KVM: Fix integer overflow in kvm_pmu_validate_counter_mask()
      RISC-V: KVM: Fix shift-out-of-bounds in make_xfence_request()

Jinyu Tang (1):
      KVM: riscv: Skip CSR restore if VCPU is reloaded on the same core

Mayuresh Chitale (1):
      KVM: riscv: selftests: Implement kvm_arch_has_default_irqchip

Osama Abdelkader (2):
      RISC-V: KVM: fix PMU snapshot_set_shmem on 32-bit hosts
      riscv: kvm: fix vector context allocation leak

Wang Yechao (2):
      RISC-V: KVM: Fix lost write protection on huge pages during dirty logging
      RISC-V: KVM: Split huge pages during fault handling for dirty logging

Yufeng Wang (1):
      riscv: kvm: add null pointer check for vector datap

 arch/riscv/include/asm/kvm_gstage.h                |  51 +++-
 arch/riscv/include/asm/kvm_host.h                  |  23 +-
 arch/riscv/include/asm/kvm_isa.h                   |  20 ++
 arch/riscv/include/asm/kvm_vcpu_config.h           |  25 ++
 arch/riscv/include/uapi/asm/kvm.h                  |   8 +-
 arch/riscv/kvm/Makefile                            |   2 +
 arch/riscv/kvm/aia_device.c                        |   4 +-
 arch/riscv/kvm/gstage.c                            | 198 +++++++++++---
 arch/riscv/kvm/isa.c                               | 253 ++++++++++++++++++
 arch/riscv/kvm/main.c                              |  16 +-
 arch/riscv/kvm/mmu.c                               |  70 ++---
 arch/riscv/kvm/tlb.c                               |   3 +-
 arch/riscv/kvm/vcpu.c                              | 111 +++-----
 arch/riscv/kvm/vcpu_config.c                       | 103 ++++++++
 arch/riscv/kvm/vcpu_fp.c                           |   9 +-
 arch/riscv/kvm/vcpu_onereg.c                       | 284 ++-------------------
 arch/riscv/kvm/vcpu_pmu.c                          |  33 ++-
 arch/riscv/kvm/vcpu_sbi_sta.c                      |  16 +-
 arch/riscv/kvm/vcpu_timer.c                        |   3 +-
 arch/riscv/kvm/vcpu_vector.c                       |  11 +-
 arch/riscv/kvm/vm.c                                |  49 +++-
 arch/riscv/kvm/vmid.c                              |   3 +-
 .../testing/selftests/kvm/include/kvm_util_types.h |   2 +
 tools/testing/selftests/kvm/include/riscv/sbi.h    |  37 +++
 tools/testing/selftests/kvm/lib/riscv/processor.c  |   5 +
 tools/testing/selftests/kvm/riscv/sbi_pmu_test.c   |  20 +-
 tools/testing/selftests/kvm/steal_time.c           |  98 +++++--
 27 files changed, 956 insertions(+), 501 deletions(-)
 create mode 100644 arch/riscv/include/asm/kvm_isa.h
 create mode 100644 arch/riscv/include/asm/kvm_vcpu_config.h
 create mode 100644 arch/riscv/kvm/isa.c
 create mode 100644 arch/riscv/kvm/vcpu_config.c