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

From: guoren@kernel.org
To: guoren@kernel.org, troy.mitchell@linux.dev
Cc: alex@ghiti.fr, anup@brainfault.org, aou@eecs.berkeley.edu,
	atish.patra@linux.dev, fangyu.yu@linux.alibaba.com,
	guoren@linux.alibaba.com, kvm-riscv@lists.infradead.org,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org, palmer@dabbelt.com,
	paul.walmsley@sifive.com
Subject: [PATCH V4 0/3] Fixup & optimize hgatp mode & vmid detect functions
Date: Wed, 20 Aug 2025 23:17:15 -0400	[thread overview]
Message-ID: <20250821031719.2366017-1-guoren@kernel.org> (raw)
In-Reply-To: <CAJF2gTQFWJzHhRoQ-oASO9nn1kC0dv+NuK-DD=JgfeHE90RWqw@mail.gmail.com>

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.

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

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