linux-kernel - [PATCH 00/13] MMU related improvements for KVM RISC-V

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Message-ID: <20250605061458.196003-1-apatel@ventanamicro.com>
Date: Thu,  5 Jun 2025 11:44:45 +0530
From: Anup Patel <apatel@...tanamicro.com>
To: Atish Patra <atish.patra@...ux.dev>
Cc: Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Alexandre Ghiti <alex@...ti.fr>,
	Andrew Jones <ajones@...tanamicro.com>,
	Anup Patel <anup@...infault.org>,
	kvm@...r.kernel.org,
	kvm-riscv@...ts.infradead.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH 00/13] MMU related improvements for KVM RISC-V

This series primarily has various MMU improvements for KVM RISC-V
and it also serves as a preparatory series for the upcoming nested
virtualization support.

PATCH1 to PATCH2: SBI spec related fixes in SBI RFENCE extension
PATCH3 to PATCH6: Few cosmetic improvements
PATCH7 to PATCH8: TLB maintenance related improvements
PATCH9 to PATCH13: MMU related preparatory work for nested virtualization

These patches can also be found in the riscv_kvm_mmu_imp_v1 branch
at: https://github.com/avpatel/linux.git

Anup Patel (13):
  RISC-V: KVM: Fix the size parameter check in SBI SFENCE calls
  RISC-V: KVM: Don't treat SBI HFENCE calls as NOPs
  RISC-V: KVM: Check kvm_riscv_vcpu_alloc_vector_context() return value
  RISC-V: KVM: Drop the return value of kvm_riscv_vcpu_aia_init()
  RISC-V: KVM: Rename and move kvm_riscv_local_tlb_sanitize()
  RISC-V: KVM: Replace KVM_REQ_HFENCE_GVMA_VMID_ALL with
    KVM_REQ_TLB_FLUSH
  RISC-V: KVM: Don't flush TLB in gstage_set_pte() when PTE is unchanged
  RISC-V: KVM: Implement kvm_arch_flush_remote_tlbs_range()
  RISC-V: KVM: Factor-out MMU related declarations into separate headers
  RISC-V: KVM: Introduce struct kvm_gstage_mapping
  RISC-V: KVM: Add vmid field to struct kvm_riscv_hfence
  RISC-V: KVM: Factor-out g-stage page table management
  RISC-V: KVM: Pass VMID as parameter to kvm_riscv_hfence_xyz() APIs

 arch/riscv/include/asm/kvm_aia.h    |   2 +-
 arch/riscv/include/asm/kvm_gstage.h |  72 ++++
 arch/riscv/include/asm/kvm_host.h   | 103 +-----
 arch/riscv/include/asm/kvm_mmu.h    |  21 ++
 arch/riscv/include/asm/kvm_tlb.h    |  84 +++++
 arch/riscv/include/asm/kvm_vmid.h   |  27 ++
 arch/riscv/kvm/Makefile             |   1 +
 arch/riscv/kvm/aia_device.c         |   6 +-
 arch/riscv/kvm/aia_imsic.c          |  12 +-
 arch/riscv/kvm/gstage.c             | 336 +++++++++++++++++++
 arch/riscv/kvm/main.c               |   3 +-
 arch/riscv/kvm/mmu.c                | 499 ++++++----------------------
 arch/riscv/kvm/tlb.c                | 110 +++---
 arch/riscv/kvm/vcpu.c               |  27 +-
 arch/riscv/kvm/vcpu_exit.c          |   7 +-
 arch/riscv/kvm/vcpu_sbi_replace.c   |  25 +-
 arch/riscv/kvm/vcpu_sbi_v01.c       |  25 +-
 arch/riscv/kvm/vm.c                 |   7 +-
 arch/riscv/kvm/vmid.c               |  25 ++
 19 files changed, 791 insertions(+), 601 deletions(-)
 create mode 100644 arch/riscv/include/asm/kvm_gstage.h
 create mode 100644 arch/riscv/include/asm/kvm_mmu.h
 create mode 100644 arch/riscv/include/asm/kvm_tlb.h
 create mode 100644 arch/riscv/include/asm/kvm_vmid.h
 create mode 100644 arch/riscv/kvm/gstage.c

-- 
2.43.0