From patchwork Mon Nov 22 10:41:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: WANG Xuerui X-Patchwork-Id: 12631579 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D9E07C433F5 for ; Mon, 22 Nov 2021 10:43:59 +0000 (UTC) Received: from localhost ([::1]:50858 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mp6nm-0002HU-F6 for qemu-devel@archiver.kernel.org; Mon, 22 Nov 2021 05:43:58 -0500 Received: from eggs.gnu.org ([209.51.188.92]:52472) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mp6mM-0008St-Aj for qemu-devel@nongnu.org; Mon, 22 Nov 2021 05:42:30 -0500 Received: from mail.xen0n.name ([115.28.160.31]:40522 helo=mailbox.box.xen0n.name) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mp6mC-0007aa-7x for qemu-devel@nongnu.org; Mon, 22 Nov 2021 05:42:30 -0500 Received: from ld50.lan (unknown [101.88.31.179]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by mailbox.box.xen0n.name (Postfix) with ESMTPSA id 1066E60184; Mon, 22 Nov 2021 18:42:10 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=xen0n.name; s=mail; t=1637577730; bh=oFKT6W0UbcoV40CEA2vxr29af8P44h04fZqPKGG9Yjk=; h=From:To:Cc:Subject:Date:From; b=dWt4YGuZW22g2aMsU1dc14+LVX9OFnrPWnfBMa7fuDK1HTXlxBVIBBHdAQ+cUHMky 4SsNIU/NiSeaeekVaDjvnRPMgIa/D8hJ5ugUz3z8Rb4BgGrj5TkLZkgVvW+wJMnSmz 5LOD7JpRiW6HRnWTGzQ6uFxiaWdcpN+Wr1lH7QXU= From: WANG Xuerui To: qemu-devel@nongnu.org Subject: [PATCH v7 00/31] LoongArch64 port of QEMU TCG Date: Mon, 22 Nov 2021 18:41:30 +0800 Message-Id: <20211122104201.112695-1-git@xen0n.name> X-Mailer: git-send-email 2.34.0 MIME-Version: 1.0 Received-SPF: pass client-ip=115.28.160.31; envelope-from=git@xen0n.name; helo=mailbox.box.xen0n.name X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , XiaoJuan Yang , Richard Henderson , =?utf-8?q?Philippe_Mathie?= =?utf-8?q?u-Daud=C3=A9?= , Laurent Vivier , WANG Xuerui , =?utf-8?q?Alex_Benn=C3=A9e?= , Song Gao Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi all, This is a port of QEMU TCG to the brand-new CPU architecture LoongArch, introduced by Loongson with their 3A5000 chips. Tests (run with `ninja test`) all passed, as usual; I also boot-tested x86_64 (Debian and Gentoo installation CDs) and install-tested aarch64 (Debian netboot installer), and ran riscv64 linux-user emulation with a chroot; everything seems fine. Cross LoongArch64 builds are also added to CI matrix in this revision. ## About the series Only the LP64D ABI is supported, as this is the only one fully implemented and supported by Loongson. 32-bit support is incomplete from outset, and removed from the very latest upstream submissions, so you can't even configure for that. The architecture's documentation is already translated into English; it can be browsed at https://loongson.github.io/LoongArch-Documentation/. The LoongArch ELF psABI doc (version 1.00) could be found at [1]; if anything is missing there, it's most likely the same as RISC-V, but you can always raise an issue over their issue tracker at [2]. [1]: https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html [2]: https://github.com/loongson/LoongArch-Documentation/issues In this series I made use of generated instruction encodings and emitters from https://github.com/loongson-community/loongarch-opcodes (a community project started by myself, something I must admit), as the LoongArch encoding is highly irregular even for a fixed 32-bit ISA, and I want to minimize the maintenance burden for future collaboration. This is something not seen in any of the other TCG ports out there, so I'd like to see if this is acceptable practice (and also maybe bikeshed the file name). This series touches some of the same files as Song Gao's previous submission of LoongArch *target* support, which is a bit unfortunate; one of us will have to rebase after either series gets in. Actual conflict should only happen on build system bits and include/elf.h, though, as we're working on entirely different areas. ## How to build and test this Upstream support for LoongArch is largely WIP for now, which means you must apply a lot of patches if you want to even cross-build for this arch. The main sources I used are as follows: * binutils: (already upstream as of November 2021) * gcc: https://github.com/xen0n/gcc/tree/for-gentoo-gcc-12-v2 based on https://github.com/loongson/gcc/tree/loongarch_upstream * glibc: https://github.com/xen0n/glibc/tree/for-gentoo-glibc-2.34 based on https://github.com/loongson/glibc/tree/loongarch_2_34_for_upstream * Linux: https://github.com/xen0n/linux/tree/loongarch-playground based on https://github.com/loongson/linux/tree/loongarch-next * Gentoo overlay: https://github.com/xen0n/loongson-overlay I have made ready-to-use Gentoo stage3 tarballs, but they're served with CDN off my personal cloud account, and I don't want the link to be exposed so that my bills skyrocket; you can reach me off-list to get the links if you're interested. As for the hardware availability, the boards can already be bought in China on Taobao, and I think some people at Loongson might be able to arrange for testing environments, if testing on real hardware other than mine is required before merging; they have their in-house Debian spin-off from the early days of this architecture. Their kernel is ABI-incompatible with the version being upstreamed and used by me, but QEMU should work there regardless. Lastly, I'm new to QEMU development and this is my first patch series here; apologizes if I get anything wrong, and any help or suggestion is certainly appreciated! ## New patches in need of review Only the last (31st) patch is new in this round; others are mostly untouched, save for build fixes during rebase. ## Changelog v7 -> v6: - Rebased to latest development branch - Added Docker image for cross-compilation and cross-build CI jobs v6 -> v5: - Fixed many places using 0/1 to say false/true - Tweaks to tcg_out_movi - Moved variable declarations to top of function, as per QEMU coding style - Added ASCII art to better explain names like `hi12` `hi32` and `hi52` - Added example `uname -a` outputs to commit message of Patch 30 to help people make sense of the change v5 -> v4: - Updated generated instruction definition to latest (added ldx/stx family of indexed load/stores) - Incorporated Richard's suggestion for tcg_out_movi, tested to cover the cases it's supposed to improve - Fixed a "size == MO_64" occurrence to just say "type" - Used indexed load/stores to optimize qemu_ld/st - Fixed zero-extension of address register for qemu_ld/st on 32-bit targets v4 -> v3: - Addressed all review comments from v3 - Made MAX_CODE_GEN_BUFFER_SIZE to be just SIZE_MAX (but kept TCG_TARGET_NB_REGS as macro definition) - Updated generated instruction definition, made it clear that the whole file is generated - Used deposit64 for hand-written relocation code - Reworked tcg_out_movi - Use pcalau12i + ori for PC-relative values whose offset fits in 32-bit - Every individual insn in the slow path (lu12i.w + ori + cu32i.d + cu52i.d) can be suppressed if not needed - Fixed constraint of setcond ops, don't allow constant zero for 1st operand v3 -> v2: - Addressed all review comments from v2 - Re-organized changes to tcg-target.h so that it's incrementally updated in each commit implementing ops - Removed support for the eqv op - Added support for bswap16_i{32,64} ops - Fixed and refactored various places as pointed out during review - Updated generated instruction definitions to latest v2 -> v1: - Addressed all review comments from v1 - Use "loongarch64" everywhere, tcg directory renamed to "tcg/loongarch64" - Removed all redundant TCG_TARGET_REG_BITS conditional - Removed support for the neg op - Added support for eqv and bswap32_i64 ops - Added safe syscall handling for linux-user - Fixed everything else I could see - Updated generated instruction definitions to latest - Reordered the configure/meson.build changes to come last v6: https://patchew.org/QEMU/20210925173032.2434906-1-git@xen0n.name/ v5: https://patchew.org/QEMU/20210924172527.904294-1-git@xen0n.name/ v4: https://patchew.org/QEMU/20210923165939.729081-1-git@xen0n.name/ v3: https://patchew.org/QEMU/20210922180927.666273-1-git@xen0n.name/ v2: https://patchew.org/QEMU/20210921201915.601245-1-git@xen0n.name/ v1: https://patchew.org/QEMU/20210920080451.408655-1-git@xen0n.name/ WANG Xuerui (31): elf: Add machine type value for LoongArch MAINTAINERS: Add tcg/loongarch64 entry with myself as maintainer tcg/loongarch64: Add the tcg-target.h file tcg/loongarch64: Add generated instruction opcodes and encoding helpers tcg/loongarch64: Add register names, allocation order and input/output sets tcg/loongarch64: Define the operand constraints tcg/loongarch64: Implement necessary relocation operations tcg/loongarch64: Implement the memory barrier op tcg/loongarch64: Implement tcg_out_mov and tcg_out_movi tcg/loongarch64: Implement goto_ptr tcg/loongarch64: Implement sign-/zero-extension ops tcg/loongarch64: Implement not/and/or/xor/nor/andc/orc ops tcg/loongarch64: Implement deposit/extract ops tcg/loongarch64: Implement bswap{16,32,64} ops tcg/loongarch64: Implement clz/ctz ops tcg/loongarch64: Implement shl/shr/sar/rotl/rotr ops tcg/loongarch64: Implement add/sub ops tcg/loongarch64: Implement mul/mulsh/muluh/div/divu/rem/remu ops tcg/loongarch64: Implement br/brcond ops tcg/loongarch64: Implement setcond ops tcg/loongarch64: Implement tcg_out_call tcg/loongarch64: Implement simple load/store ops tcg/loongarch64: Add softmmu load/store helpers, implement qemu_ld/qemu_st ops tcg/loongarch64: Implement tcg_target_qemu_prologue tcg/loongarch64: Implement exit_tb/goto_tb tcg/loongarch64: Implement tcg_target_init tcg/loongarch64: Register the JIT linux-user: Add safe syscall handling for loongarch64 hosts accel/tcg/user-exec: Implement CPU-specific signal handler for loongarch64 hosts configure, meson.build: Mark support for loongarch64 hosts tests/docker: Add gentoo-loongarch64-cross image and run cross builds in GitLab .gitlab-ci.d/container-cross.yml | 27 + .gitlab-ci.d/crossbuilds.yml | 16 + MAINTAINERS | 7 + configure | 7 +- include/elf.h | 2 + linux-user/host/loongarch64/host-signal.h | 82 + linux-user/host/loongarch64/hostdep.h | 34 + .../host/loongarch64/safe-syscall.inc.S | 80 + meson.build | 2 +- tcg/loongarch64/tcg-insn-defs.c.inc | 979 ++++++++++ tcg/loongarch64/tcg-target-con-set.h | 31 + tcg/loongarch64/tcg-target-con-str.h | 28 + tcg/loongarch64/tcg-target.c.inc | 1677 +++++++++++++++++ tcg/loongarch64/tcg-target.h | 180 ++ tests/docker/Makefile.include | 21 + .../gentoo-loongarch64-cross.docker | 19 + .../build-toolchain.sh | 123 ++ 17 files changed, 3313 insertions(+), 2 deletions(-) create mode 100644 linux-user/host/loongarch64/host-signal.h create mode 100644 linux-user/host/loongarch64/hostdep.h create mode 100644 linux-user/host/loongarch64/safe-syscall.inc.S create mode 100644 tcg/loongarch64/tcg-insn-defs.c.inc create mode 100644 tcg/loongarch64/tcg-target-con-set.h create mode 100644 tcg/loongarch64/tcg-target-con-str.h create mode 100644 tcg/loongarch64/tcg-target.c.inc create mode 100644 tcg/loongarch64/tcg-target.h create mode 100644 tests/docker/dockerfiles/gentoo-loongarch64-cross.docker create mode 100755 tests/docker/dockerfiles/gentoo-loongarch64-cross.docker.d/build-toolchain.sh