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 CD4FC18C933; Thu, 21 Aug 2025 03:17:39 +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=1755746259; cv=none; b=E9UDxhXRPkUP4vNvbD0kqsp/B2QaAVegzLFFhNuhI/aSui7chHNGvZVzKKt5PxcxYIVJsKl8eOmcqXf6wfuqaLMH5Sn+U7VzR/QLZW+2v7mFow6pkYEebIJdfew7zAz2RyQLEgEYXgWDphVgiTbTrgUl5ayOAQovGhqUosV4qAA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755746259; c=relaxed/simple; bh=CBOysjUe33h5qBQdWPGsKZycqcns/K6/wD6KCp8bJ4M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=EV2Yj6OaqN9HZPi7ZzHutKgAo7TjPSpyqVDdAPF01fre+pXKGwGVzY2eVPqrLNKpaPI0IoMuIXo8GNbKzgueKylb+NCisS7YmVJsxw9WvM+Cec5zkikXTMq1PxcE0OvKjfH6ozdR0xkaeYjPgkah7P6lQKWkQepR5zSXOxyifKk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gERcbd2E; 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="gERcbd2E" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B18E6C4CEF4; Thu, 21 Aug 2025 03:17:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755746259; bh=CBOysjUe33h5qBQdWPGsKZycqcns/K6/wD6KCp8bJ4M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gERcbd2EuZ5hjCz6I/jeym8J3EtLtekmyIuMroYF7gM9WQFIylCeQu1vHpKDbNN50 qgig2GOUoHsHwrZ0eVUJYRrb8qMifxNkRh8yODx146yCCz+OKihkkgeVt27nCbmo2x wTrWU6rOpl/D+IYNyT4TetLt/dI9AlUKioCA3A5cEu6twe14BdqjQf3vL57aL1lK6X 1Gi9UpplCQ/mQ/beqxvv3tnOlkXCAKWHRpmdbycU+b7T3OBsILddI14pJd97bDoi9K m10+ihe31cgcBljRdtYo2avcMJXS4P9/Ben6ge0TNGq/pMWTMzQvaNFz8lX++E8bKM EJlnV/NyP6/MQ== 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 Message-Id: <20250821031719.2366017-1-guoren@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@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. 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