From patchwork Wed Dec 20 16:00:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Jones X-Patchwork-Id: 13500323 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 49DDDC3DA6E for ; Wed, 20 Dec 2023 16:00:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ABSdupdRTM7Wj1uwS3m248fyPJQy/swdcBFX3sjbeiA=; b=Ro8DjbT40sz8YX CociqwWddQGOi6S4ZQRKhLcWG6bsD9lPHy0n/D0/TdVrFD04RWz79NDS9aUzGOIp9DasTQ4R9BZUU lkzaE59maEOyBE3khcDNjvu5pIy+fv1KLDmOs1TMahCBcPOBpEVZzNDDXAVLj/shZxn0DVF6VnEJK QRJHOrafTWfby7ombc5DXDdBH67sYwVjv1j4zojLy9wy+IsQsSBqH1yNhBrmGpieq97BtRGg/1HZy mr2NS2bjerT+ZCghlPKmKWT+oR0O4iXciY3gaH2bC5ZGs0TdW1hN2RxEUnj1UVpoZriB5f8fNSm5T sWDbEnDL7Xp/GiTfK6vw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rFz05-000ME4-30; Wed, 20 Dec 2023 16:00:49 +0000 Received: from mail-wr1-x42c.google.com ([2a00:1450:4864:20::42c]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rFyzp-000Lsm-1Q for linux-riscv@lists.infradead.org; Wed, 20 Dec 2023 16:00:36 +0000 Received: by mail-wr1-x42c.google.com with SMTP id ffacd0b85a97d-33666946422so3076952f8f.1 for ; Wed, 20 Dec 2023 08:00:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1703088028; x=1703692828; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Ef7BOv98cAGOovGfjdBZq243xgaKf+nknpOtiiGkzlE=; b=LQ3hmuWy0700PmPAqI3E/mv7gevGLrKS2QnZ6yPhwpuWrz+T5UbopuW5kIrCvXact9 L+uULQgKY6/bpdDhj760bO0eB7Om+qpYCMuOxdAiSlAY7kLZTBXRKbKv1AGQhM8M5NZj aoJ7kwau1Zir48iGNTnvQbfrHpOOmYrC/WHYbGaWku0NNsmeXy3Z2kn/zGmEpHkgEf5i 7MELyo3Ga3Masbs0MwRH95zn7E7VBh72vxW+0SPDTP9K42aMpQlBz+XYALcRa6XBXdMH JG7doSPyPXAPJoswVtrZQbWGawPuOsztT7dXl7O1EAA0GcIRhRInXcIYUmqpY3Hn6HVM mIeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703088028; x=1703692828; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Ef7BOv98cAGOovGfjdBZq243xgaKf+nknpOtiiGkzlE=; b=SBqnEnTzZgW9C2ztMLs8fkLR42XvTWyPu48MJL98AFYdj75scCaH3b6lZOMiwBRr/l GRT3ZPzpEd3ZVaye6nnwsf1XBvZGwlUACTFwsROyS9xrjPWj7EI7KZxftBAmv8i3ufdL mr3OwbHgOC3AgkkeZ4s+9C5OqGeM3OXsm6lRiGgcXMML2SrtJpNGUD5aIxnJoP37RUja 3GrffOJ3aH/Pq7Zs0mpiWlA4bKA8gP4NKCymvt00oZppwRHRjqGwyxKa5x7zryTIUTwP LTqt/IEzJ3SixZYrzU8A3ze0xloNJtOH/EOhQ579VcYj68HpmS/7xuZlqW69TmoGIseB +AWQ== X-Gm-Message-State: AOJu0YyZrMt6fnFeXiTEpE7Fthlm6wfDhnnbGMELe1v/oeM8AdHpXdvN kcsz4GvjvsuXoBpDnySa5Pf9HQ== X-Google-Smtp-Source: AGHT+IEUaGQVUmOJpZrX/6wcMiUkr7MlMCgJwXmlqp3SKkS+7blylWY6WOfvZFXTaKATAxCW7rwCPQ== X-Received: by 2002:adf:f68c:0:b0:336:64cd:3fc3 with SMTP id v12-20020adff68c000000b0033664cd3fc3mr3328065wrp.59.1703088027960; Wed, 20 Dec 2023 08:00:27 -0800 (PST) Received: from localhost (cst-prg-16-115.cust.vodafone.cz. [46.135.16.115]) by smtp.gmail.com with ESMTPSA id d5-20020a5d5385000000b0033662cf5e51sm10303884wrv.93.2023.12.20.08.00.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Dec 2023 08:00:27 -0800 (PST) From: Andrew Jones To: kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, virtualization@lists.linux-foundation.org Cc: anup@brainfault.org, atishp@atishpatra.org, pbonzini@redhat.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, jgross@suse.com, srivatsa@csail.mit.edu, guoren@kernel.org, conor.dooley@microchip.com, Atish Patra Subject: [PATCH v4 04/13] RISC-V: KVM: Add SBI STA extension skeleton Date: Wed, 20 Dec 2023 17:00:17 +0100 Message-ID: <20231220160012.40184-19-ajones@ventanamicro.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231220160012.40184-15-ajones@ventanamicro.com> References: <20231220160012.40184-15-ajones@ventanamicro.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231220_080033_519883_4A99EF9F X-CRM114-Status: GOOD ( 15.53 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add the files and functions needed to support the SBI STA (steal-time accounting) extension. In the next patches we'll complete the functions to fully enable SBI STA support. Reviewed-by: Anup Patel Reviewed-by: Atish Patra Signed-off-by: Andrew Jones --- arch/riscv/include/asm/kvm_vcpu_sbi.h | 1 + arch/riscv/include/uapi/asm/kvm.h | 1 + arch/riscv/kvm/Makefile | 1 + arch/riscv/kvm/vcpu_sbi.c | 4 +++ arch/riscv/kvm/vcpu_sbi_sta.c | 47 +++++++++++++++++++++++++++ 5 files changed, 54 insertions(+) create mode 100644 arch/riscv/kvm/vcpu_sbi_sta.c diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/asm/kvm_vcpu_sbi.h index bffda0ac59b6..99c23bb37a37 100644 --- a/arch/riscv/include/asm/kvm_vcpu_sbi.h +++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h @@ -76,6 +76,7 @@ extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_rfence; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_srst; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn; +extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental; extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor; diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h index 60d3b21dead7..e961d79622fb 100644 --- a/arch/riscv/include/uapi/asm/kvm.h +++ b/arch/riscv/include/uapi/asm/kvm.h @@ -157,6 +157,7 @@ enum KVM_RISCV_SBI_EXT_ID { KVM_RISCV_SBI_EXT_EXPERIMENTAL, KVM_RISCV_SBI_EXT_VENDOR, KVM_RISCV_SBI_EXT_DBCN, + KVM_RISCV_SBI_EXT_STA, KVM_RISCV_SBI_EXT_MAX, }; diff --git a/arch/riscv/kvm/Makefile b/arch/riscv/kvm/Makefile index 4c2067fc59fc..c9646521f113 100644 --- a/arch/riscv/kvm/Makefile +++ b/arch/riscv/kvm/Makefile @@ -26,6 +26,7 @@ kvm-$(CONFIG_RISCV_SBI_V01) += vcpu_sbi_v01.o kvm-y += vcpu_sbi_base.o kvm-y += vcpu_sbi_replace.o kvm-y += vcpu_sbi_hsm.o +kvm-y += vcpu_sbi_sta.o kvm-y += vcpu_timer.o kvm-$(CONFIG_RISCV_PMU_SBI) += vcpu_pmu.o vcpu_sbi_pmu.o kvm-y += aia.o diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c index dcdff4458190..088daaa23dd8 100644 --- a/arch/riscv/kvm/vcpu_sbi.c +++ b/arch/riscv/kvm/vcpu_sbi.c @@ -70,6 +70,10 @@ static const struct kvm_riscv_sbi_extension_entry sbi_ext[] = { .ext_idx = KVM_RISCV_SBI_EXT_DBCN, .ext_ptr = &vcpu_sbi_ext_dbcn, }, + { + .ext_idx = KVM_RISCV_SBI_EXT_STA, + .ext_ptr = &vcpu_sbi_ext_sta, + }, { .ext_idx = KVM_RISCV_SBI_EXT_EXPERIMENTAL, .ext_ptr = &vcpu_sbi_ext_experimental, diff --git a/arch/riscv/kvm/vcpu_sbi_sta.c b/arch/riscv/kvm/vcpu_sbi_sta.c new file mode 100644 index 000000000000..839911dcd837 --- /dev/null +++ b/arch/riscv/kvm/vcpu_sbi_sta.c @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 Ventana Micro Systems Inc. + */ + +#include + +#include +#include + +static int kvm_sbi_sta_steal_time_set_shmem(struct kvm_vcpu *vcpu) +{ + return SBI_ERR_FAILURE; +} + +static int kvm_sbi_ext_sta_handler(struct kvm_vcpu *vcpu, struct kvm_run *run, + struct kvm_vcpu_sbi_return *retdata) +{ + struct kvm_cpu_context *cp = &vcpu->arch.guest_context; + unsigned long funcid = cp->a6; + int ret; + + switch (funcid) { + case SBI_EXT_STA_STEAL_TIME_SET_SHMEM: + ret = kvm_sbi_sta_steal_time_set_shmem(vcpu); + break; + default: + ret = SBI_ERR_NOT_SUPPORTED; + break; + } + + retdata->err_val = ret; + + return 0; +} + +static unsigned long kvm_sbi_ext_sta_probe(struct kvm_vcpu *vcpu) +{ + return 0; +} + +const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta = { + .extid_start = SBI_EXT_STA, + .extid_end = SBI_EXT_STA, + .handler = kvm_sbi_ext_sta_handler, + .probe = kvm_sbi_ext_sta_probe, +};