[v4] Fixup & optimize hgatp mode & vmid detect functions

[PATCH V4 RESEND 0/3] Fixup & optimize hgatp mode & vmid detect functions

Posted by guoren@kernel.org 1 month, 1 week ago

From: "Guo Ren (Alibaba DAMO Academy)" <guoren@kernel.org>

Here are serval fixup & optmizitions for hgatp detect according
to the RISC-V Privileged Architecture Spec.

---
Changes in v4:
 - Involve ("RISC-V: KVM: Prevent HGATP_MODE_BARE passed"), which
   explain why gstage_mode_detect needs reset HGATP to zero.
 - RESEND for wrong mailing thread.
 
Changes in v3:
 - Add "Fixes" tag.
 - Involve("RISC-V: KVM: Remove unnecessary HGATP csr_read"), which
   depends on patch 1.

Changes in v2:
 - Fixed build error since kvm_riscv_gstage_mode() has been modified.
---

Fangyu Yu (1):
  RISC-V: KVM: Write hgatp register with valid mode bits

Guo Ren (Alibaba DAMO Academy) (2):
  RISC-V: KVM: Remove unnecessary HGATP csr_read
  RISC-V: KVM: Prevent HGATP_MODE_BARE passed

 arch/riscv/kvm/gstage.c | 27 ++++++++++++++++++++++++---
 arch/riscv/kvm/main.c   | 35 +++++++++++++++++------------------
 arch/riscv/kvm/vmid.c   |  8 +++-----
 3 files changed, 44 insertions(+), 26 deletions(-)

-- 
2.40.1

Re: [PATCH V4 RESEND 0/3] Fixup & optimize hgatp mode & vmid detect functions

Posted by Anup Patel 4 weeks ago

On Thu, Aug 21, 2025 at 7:56 PM <guoren@kernel.org> wrote:
>
> From: "Guo Ren (Alibaba DAMO Academy)" <guoren@kernel.org>
>
> Here are serval fixup & optmizitions for hgatp detect according
> to the RISC-V Privileged Architecture Spec.
>
> ---
> Changes in v4:
>  - Involve ("RISC-V: KVM: Prevent HGATP_MODE_BARE passed"), which
>    explain why gstage_mode_detect needs reset HGATP to zero.
>  - RESEND for wrong mailing thread.
>
> Changes in v3:
>  - Add "Fixes" tag.
>  - Involve("RISC-V: KVM: Remove unnecessary HGATP csr_read"), which
>    depends on patch 1.
>
> Changes in v2:
>  - Fixed build error since kvm_riscv_gstage_mode() has been modified.
> ---
>
> Fangyu Yu (1):
>   RISC-V: KVM: Write hgatp register with valid mode bits
>
> Guo Ren (Alibaba DAMO Academy) (2):
>   RISC-V: KVM: Remove unnecessary HGATP csr_read
>   RISC-V: KVM: Prevent HGATP_MODE_BARE passed
>
>  arch/riscv/kvm/gstage.c | 27 ++++++++++++++++++++++++---
>  arch/riscv/kvm/main.c   | 35 +++++++++++++++++------------------
>  arch/riscv/kvm/vmid.c   |  8 +++-----
>  3 files changed, 44 insertions(+), 26 deletions(-)
>
> --
> 2.40.1
>

Queued this series for Linux-6.18

Regards,
Anup

Re: [PATCH V4 RESEND 0/3] Fixup & optimize hgatp mode & vmid detect functions

Posted by Guo Ren 4 weeks, 1 day ago

Hi Anup,

Ping..., hope for feedback.

On Thu, Aug 21, 2025 at 10:26 PM <guoren@kernel.org> wrote:
>
> From: "Guo Ren (Alibaba DAMO Academy)" <guoren@kernel.org>
>
> Here are serval fixup & optmizitions for hgatp detect according
> to the RISC-V Privileged Architecture Spec.
>
> ---
> Changes in v4:
>  - Involve ("RISC-V: KVM: Prevent HGATP_MODE_BARE passed"), which
>    explain why gstage_mode_detect needs reset HGATP to zero.
>  - RESEND for wrong mailing thread.
>
> Changes in v3:
>  - Add "Fixes" tag.
>  - Involve("RISC-V: KVM: Remove unnecessary HGATP csr_read"), which
>    depends on patch 1.
>
> Changes in v2:
>  - Fixed build error since kvm_riscv_gstage_mode() has been modified.
> ---
>
> Fangyu Yu (1):
>   RISC-V: KVM: Write hgatp register with valid mode bits
>
> Guo Ren (Alibaba DAMO Academy) (2):
>   RISC-V: KVM: Remove unnecessary HGATP csr_read
>   RISC-V: KVM: Prevent HGATP_MODE_BARE passed
>
>  arch/riscv/kvm/gstage.c | 27 ++++++++++++++++++++++++---
>  arch/riscv/kvm/main.c   | 35 +++++++++++++++++------------------
>  arch/riscv/kvm/vmid.c   |  8 +++-----
>  3 files changed, 44 insertions(+), 26 deletions(-)
>
> --
> 2.40.1
>


-- 
Best Regards
 Guo Ren