Re: [PATCH v4 0/9] RISC-V KVM virtualize AIA CSRs

[Anup Patel]

On Tue, Apr 4, 2023 at 9:05 PM Anup Patel <apatel@xxxxxxxxxxxxxxxx> wrote:
>
> The RISC-V AIA specification is now frozen as-per the RISC-V international
> process. The latest frozen specifcation can be found at:
> https://github.com/riscv/riscv-aia/releases/download/1.0-RC3/riscv-interrupts-1.0-RC3.pdf
>
> This series implements first phase of AIA virtualization which targets
> virtualizing AIA CSRs. This also provides a foundation for the second
> phase of AIA virtualization which will target in-kernel AIA irqchip
> (including both IMSIC and APLIC).
>
> The first two patches are shared with the "Linux RISC-V AIA Support"
> series which adds AIA driver support.
>
> To test this series, use AIA drivers from the "Linux RISC-V AIA Support"
> series and use KVMTOOL from the riscv_aia_v1 branch at:
> https://github.com/avpatel/kvmtool.git
>
> These patches can also be found in the riscv_kvm_aia_csr_v4 branch at:
> https://github.com/avpatel/linux.git
>
> Based-on: 20230401112730.2105240-1-apatel@xxxxxxxxxxxxxxxx
> (https://lore.kernel.org/lkml/20230401112730.2105240-1-apatel@xxxxxxxxxxxxxxxx/)
>
> Based-on: 20230403121527.2286489-1-apatel@xxxxxxxxxxxxxxxx
> (https://lore.kernel.org/lkml/20230403121527.2286489-1-apatel@xxxxxxxxxxxxxxxx/)
>
> Changes since v3:
>  - Split PATCH7 into two patches
>  - Addressed comments in PATCH7, PATCH8 and PATCH9
>
> Changes since v2:
>  - Rebased on Linux-6.3-rc5
>  - Split PATCH5 into two separate patches as suggested by Atish.
>
> Changes since v1:
>  - Addressed from Drew and Conor in PATCH1
>  - Use alphabetical ordering for SMAIA and SSAIA enum in PATCH2
>  - Use GENMASK() in PATCH3
>
> Anup Patel (9):
>   RISC-V: Add AIA related CSR defines
>   RISC-V: Detect AIA CSRs from ISA string
>   RISC-V: KVM: Drop the _MASK suffix from hgatp.VMID mask defines
>   RISC-V: KVM: Initial skeletal support for AIA
>   RISC-V: KVM: Implement subtype for CSR ONE_REG interface
>   RISC-V: KVM: Add ONE_REG interface for AIA CSRs
>   RISC-V: KVM: Use bitmap for irqs_pending and irqs_pending_mask
>   RISC-V: KVM: Virtualize per-HART AIA CSRs
>   RISC-V: KVM: Implement guest external interrupt line management

I have queued PATCH1 to PATCH8 for Linux-6.4

The PATCH9 depends on "RISC-V IPI Improvements" series
so this patch will be sent as separate PR or differed to Linux-6.5

Regards,
Anup

>
>  arch/riscv/include/asm/csr.h      | 107 ++++-
>  arch/riscv/include/asm/hwcap.h    |   8 +
>  arch/riscv/include/asm/kvm_aia.h  | 137 +++++++
>  arch/riscv/include/asm/kvm_host.h |  14 +-
>  arch/riscv/include/uapi/asm/kvm.h |  18 +-
>  arch/riscv/kernel/cpu.c           |   2 +
>  arch/riscv/kernel/cpufeature.c    |   2 +
>  arch/riscv/kvm/Makefile           |   1 +
>  arch/riscv/kvm/aia.c              | 627 ++++++++++++++++++++++++++++++
>  arch/riscv/kvm/main.c             |  23 +-
>  arch/riscv/kvm/mmu.c              |   3 +-
>  arch/riscv/kvm/vcpu.c             | 190 +++++++--
>  arch/riscv/kvm/vcpu_insn.c        |   1 +
>  arch/riscv/kvm/vm.c               |   4 +
>  arch/riscv/kvm/vmid.c             |   4 +-
>  15 files changed, 1083 insertions(+), 58 deletions(-)
>  create mode 100644 arch/riscv/include/asm/kvm_aia.h
>  create mode 100644 arch/riscv/kvm/aia.c
>
> --
> 2.34.1
>