From patchwork Thu Nov 18 08:39:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Atish Kumar Patra X-Patchwork-Id: 12626281 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52FE4C433F5 for ; Thu, 18 Nov 2021 08:40:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32B4661B30 for ; Thu, 18 Nov 2021 08:40:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244713AbhKRInG (ORCPT ); Thu, 18 Nov 2021 03:43:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49052 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244706AbhKRInE (ORCPT ); Thu, 18 Nov 2021 03:43:04 -0500 Received: from mail-oi1-x22b.google.com (mail-oi1-x22b.google.com [IPv6:2607:f8b0:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 87A91C061570 for ; Thu, 18 Nov 2021 00:40:04 -0800 (PST) Received: by mail-oi1-x22b.google.com with SMTP id t23so12738147oiw.3 for ; Thu, 18 Nov 2021 00:40:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=NZ5d2Mg97hCmt2Auy3YSJwXJWgHFgaajhKOEaXBwnhg=; b=CibBKtO6qxuKTBTJ0psPoXn9amPcjTOpSGsm9vUUpAg8kHeq+Dmf7Zh1G3f2iLXGIo yHwmQzIYjGadq07oNk0RVUB3BfkBp2w2fuJGxEbQ7JGBiQ5A4dlTwquUKZWgvqlzGQdp hJsoGgnEjBrUQvCB7c4g/mHIqgT/WsTz6cSReQoKxm9M7cAeIAflut7WjJNWEr2/GPZe npHxNRBqmJBYVTGtoqTAS/xKuWg0U3ZBL34B3caoTHEqix9ocmXME+k4SfncdccsY8CE dpvHxU8Pu/SnP397X/30Ws8jCSFFj4HVmQg2+pEcjEyWiRuVftk3z9XL/o5eZ/r8Bw0y O8ZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=NZ5d2Mg97hCmt2Auy3YSJwXJWgHFgaajhKOEaXBwnhg=; b=3OTrtFoNasdAsCKUfJkG+HIwMj8Gw1Q0cX1BqokBTYr/jeK4SK93XkgMY4AsB8lA5+ x3IXWRhf7lV2a5MKfLUnVUPXGsfNFiFYA350aeuqQnaeaQpJonZSuLx8rH/pCfgamci0 LdV6k+gQB6AQ7P3CepRQ5ezBEkLrgB7kh9A9G8uod3tfbUgO50G22kSSjQWaTiEJ/gOG M/GGp8g6JU4iRmeQfmUCtbnWReXVSYD7TTYeuVrIQwI9DcA6YCBQ+ypNxEtLOrAl9Idr royeLwJJv6eDZCKXQV6fjP09I10Af4fHPBh9Ho290T9NiBeUWhXKJg8hx3whcj7RIDe4 OkAw== X-Gm-Message-State: AOAM533qyMeAPrG7lcvy8+JdtmvckoHpPTg1r2Iwo/dT0P1RFsvjlHV5 9D5+T4T/h7IqT/QW/Y+63pm+DQ== X-Google-Smtp-Source: ABdhPJxVg8pZ9U2lJaHKgd16zEGWSw2zFeEUTc1fmN5tAS2Msi4uRoVOvNoWLXa28uD9pKte8FCZ9Q== X-Received: by 2002:a05:6808:2187:: with SMTP id be7mr6203100oib.97.1637224803916; Thu, 18 Nov 2021 00:40:03 -0800 (PST) Received: from fedora.. (99-13-229-45.lightspeed.snjsca.sbcglobal.net. [99.13.229.45]) by smtp.gmail.com with ESMTPSA id p14sm422100oov.0.2021.11.18.00.40.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Nov 2021 00:40:03 -0800 (PST) From: Atish Patra To: linux-kernel@vger.kernel.org Cc: Atish Patra , Albert Ou , Anup Patel , Heinrich Schuchardt , Kefeng Wang , kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-riscv@lists.infradead.org, Palmer Dabbelt , Paul Walmsley Subject: [PATCH v5 0/5] Add SBI v0.2 support for KVM Date: Thu, 18 Nov 2021 00:39:07 -0800 Message-Id: <20211118083912.981995-1-atishp@rivosinc.com> X-Mailer: git-send-email 2.33.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The Supervisor Binary Interface(SBI) specification[1] now defines a base extension that provides extendability to add future extensions while maintaining backward compatibility with previous versions. The new version is defined as 0.2 and older version is marked as 0.1. This series adds following features to RISC-V Linux KVM. 1. Adds support for SBI v0.2 in KVM 2. SBI Hart state management extension (HSM) in KVM 3. Ordered booting of guest vcpus in guest Linux This series is based on base KVM series which is already part of the kvm-next[2]. Guest kernel needs to also support SBI v0.2 and HSM extension in Kernel to boot multiple vcpus. Linux kernel supports both starting v5.7. In absense of that, guest can only boot 1 vcpu. Changes from v4->v5: 1. Added reviewed-by tags. 2. Removed the redundant kvm_cpu_context pointer sanity check. Changes from v3->v4: 1. Fixed the commit text title. 2. Removed a redundant memory barrier from patch 4. 3. Replaced preempt_enable/disable with get_cpu/put_cpu. 4. Renamed the exixting implementation as v01 instead of legacy. Changes from v2->v3: 1. Rebased on the latest merged kvm series. 2. Dropped the reset extension patch because reset extension is not merged in kernel. However, my tree[3] still contains it in case anybody wants to test it. Changes from v1->v2: 1. Sent the patch 1 separately as it can merged independently. 2. Added Reset extension functionality. Tested on Qemu and Rocket core FPGA. [1] https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc [3] https://github.com/atishp04/linux/tree/kvm_sbi_v05_reset [4] https://github.com/atishp04/linux/tree/kvm_sbi_v05 Atish Patra (5): RISC-V: KVM: Mark the existing SBI implementation as v01 RISC-V: KVM: Reorganize SBI code by moving SBI v0.1 to its own file RISC-V: KVM: Add SBI v0.2 base extension RISC-V: KVM: Add v0.1 replacement SBI extensions defined in v02 RISC-V: KVM: Add SBI HSM extension in KVM arch/riscv/include/asm/kvm_vcpu_sbi.h | 33 ++++ arch/riscv/include/asm/sbi.h | 9 ++ arch/riscv/kvm/Makefile | 4 + arch/riscv/kvm/vcpu.c | 23 +++ arch/riscv/kvm/vcpu_sbi.c | 211 ++++++++++++-------------- arch/riscv/kvm/vcpu_sbi_base.c | 70 +++++++++ arch/riscv/kvm/vcpu_sbi_hsm.c | 105 +++++++++++++ arch/riscv/kvm/vcpu_sbi_replace.c | 133 ++++++++++++++++ arch/riscv/kvm/vcpu_sbi_v01.c | 126 +++++++++++++++ 9 files changed, 599 insertions(+), 115 deletions(-) create mode 100644 arch/riscv/include/asm/kvm_vcpu_sbi.h create mode 100644 arch/riscv/kvm/vcpu_sbi_base.c create mode 100644 arch/riscv/kvm/vcpu_sbi_hsm.c create mode 100644 arch/riscv/kvm/vcpu_sbi_replace.c create mode 100644 arch/riscv/kvm/vcpu_sbi_v01.c --- 2.33.1