[v2,0/7] RISC-V KVM virtualize AIA CSRs

Message

Anup Patel Jan. 28, 2023, 7:27 a.m. UTC

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-RC1/riscv-interrupts-1.0-RC1.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_v2 branch at:
https://github.com/avpatel/linux.git

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 (7):
  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: Add ONE_REG interface for AIA CSRs
  RISC-V: KVM: Virtualize per-HART AIA CSRs
  RISC-V: KVM: Implement guest external interrupt line management

 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 |  22 +-
 arch/riscv/kernel/cpu.c           |   2 +
 arch/riscv/kernel/cpufeature.c    |   2 +
 arch/riscv/kvm/Makefile           |   1 +
 arch/riscv/kvm/aia.c              | 624 ++++++++++++++++++++++++++++++
 arch/riscv/kvm/main.c             |  14 +
 arch/riscv/kvm/mmu.c              |   3 +-
 arch/riscv/kvm/vcpu.c             | 185 +++++++--
 arch/riscv/kvm/vcpu_insn.c        |   4 +-
 arch/riscv/kvm/vm.c               |   4 +
 arch/riscv/kvm/vmid.c             |   4 +-
 15 files changed, 1075 insertions(+), 56 deletions(-)
 create mode 100644 arch/riscv/include/asm/kvm_aia.h
 create mode 100644 arch/riscv/kvm/aia.c

Comments

Anup Patel Jan. 31, 2023, 6:01 a.m. UTC | #1

Hi Palmer,

On Sat, Jan 28, 2023 at 12:57 PM Anup Patel <[e-mail]> 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-RC1/riscv-interrupts-1.0-RC1.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_v2 branch at:
> https://github.com/avpatel/linux.git
>
> 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 (7):
>   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: Add ONE_REG interface for AIA CSRs
>   RISC-V: KVM: Virtualize per-HART AIA CSRs
>   RISC-V: KVM: Implement guest external interrupt line management

Can you please provide ACK for the first two patches so that I can
take it through the KVM RISC-V tree. ?

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 |  22 +-
>  arch/riscv/kernel/cpu.c           |   2 +
>  arch/riscv/kernel/cpufeature.c    |   2 +
>  arch/riscv/kvm/Makefile           |   1 +
>  arch/riscv/kvm/aia.c              | 624 ++++++++++++++++++++++++++++++
>  arch/riscv/kvm/main.c             |  14 +
>  arch/riscv/kvm/mmu.c              |   3 +-
>  arch/riscv/kvm/vcpu.c             | 185 +++++++--
>  arch/riscv/kvm/vcpu_insn.c        |   4 +-
>  arch/riscv/kvm/vm.c               |   4 +
>  arch/riscv/kvm/vmid.c             |   4 +-
>  15 files changed, 1075 insertions(+), 56 deletions(-)
>  create mode 100644 arch/riscv/include/asm/kvm_aia.h
>  create mode 100644 arch/riscv/kvm/aia.c
>
> --
> 2.34.1
>