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 9FB5734EEE3; Mon, 22 Jun 2026 04:01:41 +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=1782100901; cv=none; b=ZyB4sIxozHstk0OnKyEN8QbvoL9LYsmXNWwLN7vij1LF3am+zcBg41NkcOfPKKDctGO45qzgWpR36SvL6mFZ0tko0Lvu8KkkfXLGYOq+PLHdysCb4JFoLpFRK1JJJK5iuc2zdhXSdJJmXeMY+Bb0gmsCuz1jNqZJme2rC4nv+U0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782100901; c=relaxed/simple; bh=2Ue0OQWnzEfJvkx9yKoYjaChcgTBWEXuzcW+rzKXsR8=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=ZvUgkLP9sW/sh3suWOBkFrjp3PjjLZegB1W+5m8KYe7zFADmWfVL7XZi5n5vAMSiDve4cYqzIZW4v9KMx+Y5qLMivP9T/USLbso8Kip0CC+3EmWhKIMQfBNrsfW/NaWnZRHfzNjYQOEVRaCWmtZnLHV+9m+mBuMysvSbE/dd1BE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SLA34/lO; 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="SLA34/lO" Received: by smtp.kernel.org (Postfix) with ESMTPS id 45224C2BCB4; Mon, 22 Jun 2026 04:01:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1782100901; bh=2Ue0OQWnzEfJvkx9yKoYjaChcgTBWEXuzcW+rzKXsR8=; h=From:Subject:Date:To:Cc:Reply-To:From; b=SLA34/lORaq2vkbGVFcFXeaClBUdvgLejrAyf6dDarlAcLMHXyRXjwPu8O8cySp6+ 4VT981sldiiCAU5IDyVhvFBOfTsuscyI8ffF8PdMcMjuty0HmiSgq9iUahleLqKQ6/ COlJ/aBt+z4/9daFb3yB90wdNptgAQQxGESdhXMbCCv2Ys7WeGsi5xwD8L+EoAGNkQ hNG4Dvg1bK7OplDRptvAXJHUHG+UWDtAPbDOSPcXK0WB08sxp0E18Qn6ggVEw6VAMU +n/B1+usjS7sGtY/rnU58YfgYnTpbgpHpx/Vu0xaKg5eCjkamz31xZOaHVX2f2z01/ ijotvrfwL9Z4w== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2827FCDB46F; Mon, 22 Jun 2026 04:01:41 +0000 (UTC) From: Charlie Jenkins via B4 Relay Subject: [PATCH v2 00/16] riscv: Generate riscv instruction functions Date: Sun, 21 Jun 2026 21:01:18 -0700 Message-Id: <20260621-riscv_insn_table-v2-0-7f0810ee2274@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/2WNQQqDMBREryJ/3ZTERNN21XsUkWi++kGTkkhoE e/e1C4Ls3kD82aDiIEwwq3YIGCiSN5lKE8F9JNxIzKymaHkZc2FUCxQ7FNLLrp2Nd2MTF7Utcq xg5WQZ8+AA70O5aPJPFFcfXgfD0l8259Mcf0vS4JxVqlOaVkbgVrfx8XQfO79As2+7x81PW/7s AAAAA== X-Change-ID: 20260114-riscv_insn_table-38495495dfd3 To: Paul Walmsley , Palmer Dabbelt , Nam Cao , Alexandre Ghiti , Anup Patel , Atish Patra , Conor Dooley , Paolo Bonzini , Andrew Morton , Shuah Khan , =?utf-8?q?Radim_Kr=C4=8Dm=C3=A1=C5=99?= Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org, Charlie Jenkins X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1782100900; l=5328; i=thecharlesjenkins@gmail.com; s=20260605; h=from:subject:message-id; bh=2Ue0OQWnzEfJvkx9yKoYjaChcgTBWEXuzcW+rzKXsR8=; b=ne5wljDoG4zphFx5l9ULUKiRBpeUuwuxY2AbZ2BeN3QgGMMOIAhW6sy1FiM117AEx+Bc6kL8v lqEFZx/bszkD8yBFpdr3oY3ukUz9KPteAWALGmMar+HG5pTqTeSTnDX X-Developer-Key: i=thecharlesjenkins@gmail.com; a=ed25519; pk=ajnnRQ98PIdwKp4HeMkq9U32okYbnh6Zb4G3o5XXvkg= X-Endpoint-Received: by B4 Relay for thecharlesjenkins@gmail.com/20260605 with auth_id=810 X-Original-From: Charlie Jenkins Reply-To: thecharlesjenkins@gmail.com There is a lot of code that is manually manipulating riscv instructions. Constructing these headers for new instructions is time consuming and error prone. The first patch in this series introduces the instruction definition table along with a script that runs at compile time to create all of the associated instruction manipulation functions. The remaining patches migrate all of the manual instruction code to use these generated functions. The instruction definition table is generated from the riscv-unified-db[1], an open source RVI project for instruction specifications. I got this table generation merged into riscv-unified-db, that PR can be accessed on github [2]. A lot of the validation for these changes is from running all possible 32-bit or 16-bit integers through these functions to see that any given instruction will produce to expected result. I give more detail on the test cases in the notes of the first couple of patches. For the KVM patches, I also introduce two test cases to ensure that the instruction manipulation is working as expected. [1] https://github.com/riscv/riscv-unified-db [2] https://github.com/riscv/riscv-unified-db/pull/1780 Signed-off-by: Charlie Jenkins --- Changes in v2: - rebased on v7.1 - I dropped the patch fixing the mmio bug in kvm because in the meantime that bug has been fixed in a different patch - Calls to panic() for instructions not support on current hardware have been changed into BUG_ON() - Fixed incorrect handling of branches in simulate_*() - Added CONFIG_RISCV_KPROBES_SIMULATE_KUNIT for more detailed simulate_*() testing - Updated insn.tbl based on new merged in changes to riscv-unified-db - Link to v1: https://lore.kernel.org/r/20260407-riscv_insn_table-v1-0-54b4736a1e77@gmail.com --- Charlie Jenkins (16): riscv: Introduce instruction table generation riscv: alternatives: Use generated instruction headers for patching code riscv: kgdb: Use generated instruction headers riscv: Add kprobes instruction simulation KUnit riscv: kprobes: Use generated instruction headers riscv: cfi: Use generated instruction headers riscv: Use generated instruction headers for misaligned loads/stores riscv: kvm: Use generated instruction headers for csr code KVM: device: Add test device KVM: riscv: selftests: Add mmio test riscv: kvm: Use generated instruction headers for mmio emulation riscv: kvm: Add emulated test csr KVM: riscv: selftests: Add csr emulation test riscv: kvm: Use generated instruction headers for csr emulation riscv: kexec: Use generated instruction headers for kexec relocations riscv: Remove unused instruction headers arch/riscv/Kconfig.debug | 1 + arch/riscv/Makefile | 3 + arch/riscv/include/asm/Kbuild | 1 + arch/riscv/include/asm/insn.h | 563 +------- arch/riscv/include/asm/kvm_host.h | 10 + arch/riscv/include/asm/kvm_vcpu_insn.h | 5 +- arch/riscv/include/asm/kvm_vcpu_test_csr.h | 15 + arch/riscv/kernel/alternative.c | 23 +- arch/riscv/kernel/cfi.c | 6 +- arch/riscv/kernel/kgdb.c | 102 +- arch/riscv/kernel/machine_kexec_file.c | 55 +- arch/riscv/kernel/probes/decode-insn.c | 7 +- arch/riscv/kernel/probes/simulate-insn.c | 253 ++-- arch/riscv/kernel/probes/simulate-insn.h | 7 +- arch/riscv/kernel/tests/Kconfig.debug | 13 + arch/riscv/kernel/tests/kprobes/Makefile | 2 + .../kernel/tests/kprobes/test-kprobes-simulate.c | 250 ++++ arch/riscv/kernel/tests/kprobes/test-kprobes.h | 6 + arch/riscv/kernel/traps_misaligned.c | 183 ++- arch/riscv/kvm/Kconfig.debug | 16 + arch/riscv/kvm/Makefile | 1 + arch/riscv/kvm/vcpu_insn.c | 232 ++-- arch/riscv/kvm/vcpu_test_csr.c | 21 + arch/riscv/tools/Makefile | 22 + arch/riscv/tools/insn.tbl | 1392 ++++++++++++++++++++ arch/riscv/tools/insn_tbl.sh | 256 ++++ include/uapi/linux/kvm.h | 2 + lib/Kconfig.debug | 6 + tools/testing/selftests/kvm/Makefile.kvm | 2 + tools/testing/selftests/kvm/riscv/csr_test.c | 126 ++ tools/testing/selftests/kvm/riscv/mmio_test.c | 184 +++ virt/kvm/Kconfig.debug | 16 + virt/kvm/Makefile.kvm | 1 + virt/kvm/kvm_main.c | 8 + virt/kvm/mmio_test.c | 95 ++ virt/kvm/mmio_test.h | 18 + 36 files changed, 2897 insertions(+), 1006 deletions(-) --- base-commit: 8cd9520d35a6c38db6567e97dd93b1f11f185dc6 change-id: 20260114-riscv_insn_table-38495495dfd3 Best regards, -- Charlie Jenkins