From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 993D2279791; Thu, 21 Aug 2025 14:26:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755786363; cv=none; b=IHR+yEWoS7Vc4bANomUFZ7UZfkB2zhBwsALmkj7jE3/D6lvh0/tE4G7ePSrNWCSk3Cm9JOfhtuPlFrIlKulFoK44aXhaSFMGA3mmeI/VNgZNNpIj1PJ/nQI9pwe32cbAw07y3XricniFMC5+wDP6+0dB1+1UmzG/+WWRyGSFidU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755786363; c=relaxed/simple; bh=vf5Fi2dD1hhyyDWhuRPa6MLAXnOLAHxSyHEh1kLOyk8=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Vowouz86gWSs/2FmP1FK3bwy4IYYFa0cJ5dr6OQuX7SXgXayrrUOBWs1og1g0s54y/oE8oCQaVAwv860uBxk3+Z/GtrmfG6ekSeFoHW1s4qa8UuMGUqDhf8Dk0h3ahPjTLMwTZD/J9keNZKdB3RopMByVCXXbaO0Qwk3CuSscxE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jqBcBWXi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jqBcBWXi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3F3AC4CEEB; Thu, 21 Aug 2025 14:25:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755786363; bh=vf5Fi2dD1hhyyDWhuRPa6MLAXnOLAHxSyHEh1kLOyk8=; h=From:To:Cc:Subject:Date:From; b=jqBcBWXif+fIThL2sAHLO6P+dezcJUD6B52uyjHEhlGr4G2F3sudhSN7uIWye1M4F mrwuL1Yyarc1DGE5SuyKM0Pq2xOfSzMT1BbQZL9OWHjwlrJvTRSMGe65mxyaCn7zck ICYuQ7jaay+7UeUdQiSrERxZH50CFVgAh83mhcgZRsev0oUaYncD4XqaQwOUYYivMl P5FxSILMXi8HpKYDy6z/JdrUzYAd2UaufXHKE4ULD1M3OjrK9PnwTf/cnsL/R28Y7d OUppzyuTbuuURCsHkqxKvxmSfdaUFU9Y5mM4tQThNIm6d8eQKB8bHje65F5YU5I7kB mNNuFXp94m/sA== 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 RESEND 0/3] Fixup & optimize hgatp mode & vmid detect functions Date: Thu, 21 Aug 2025 10:25:39 -0400 Message-Id: <20250821142542.2472079-1-guoren@kernel.org> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Guo Ren (Alibaba DAMO Academy)" 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