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

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Message-ID: <CAJF2gTQ3XJB_UtziyfV0aFdg=L=mqc7KJPv4a8=3Z5pQYNDLng@mail.gmail.com>
Date: Thu, 4 Sep 2025 11:08:58 +0800
From: Guo Ren <guoren@...nel.org>
To: anup@...infault.org
Cc: alex@...ti.fr, aou@...s.berkeley.edu, atish.patra@...ux.dev, 
	guoren@...nel.org, troy.mitchell@...ux.dev, fangyu.yu@...ux.alibaba.com, 
	guoren@...ux.alibaba.com, kvm-riscv@...ts.infradead.org, kvm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	palmer@...belt.com, paul.walmsley@...ive.com
Subject: Re: [PATCH V4 RESEND 0/3] Fixup & optimize hgatp mode & vmid detect functions

Hi Anup,

Ping..., hope for feedback.

On Thu, Aug 21, 2025 at 10:26 PM <guoren@...nel.org> wrote:
>
> From: "Guo Ren (Alibaba DAMO Academy)" <guoren@...nel.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