From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6882C433F5 for ; Tue, 12 Apr 2022 11:27:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349554AbiDLL13 (ORCPT ); Tue, 12 Apr 2022 07:27:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352845AbiDLLZm (ORCPT ); Tue, 12 Apr 2022 07:25:42 -0400 Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED6642C136 for ; Tue, 12 Apr 2022 03:08:39 -0700 (PDT) Received: by mail-pf1-x429.google.com with SMTP id bo5so17067746pfb.4 for ; Tue, 12 Apr 2022 03:08:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5aKqoFa3PS3ofFsonmsRpILD1LHcN5f7ZDBzSGfsEbM=; b=ipNGq4iM0/5nlKBcJA0RfUYvp9Rr6U2GBDVhfGzDbwMM7QRqxO3tkO71gzVyoaVmyw pxYq72frVesdN580nWmwdlgZjtdbjkHgDPRknZvPvC77QqSIPucZ3kzcs1iduI71F9VD CJuegbEDoSDKgK4VR/rjXyqXmEcsk2DgX+ILLvm86Q0Bh1BaVgux/GspmTOI+cb5pEjI pxDAf5zVkqsYVX2BwgHBGLurHEQXOUE2Thu28cfE0yA5NfkFaKHm2Tj7ynpHHaMVos5Q eeaNbwd5u3GbYkrSh8PslJkhe7B1bvA14msLKO6BZE18MLW3Iuwk3h3bp1834tybWMuk CGHw== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=5aKqoFa3PS3ofFsonmsRpILD1LHcN5f7ZDBzSGfsEbM=; b=adsbZt0dXRtRsyrOYBVM+uOQW45BPCchgvOAx9QfowuJzFVntSvmJJNhwmT9QlGlVV BSxPTomDuSXkykRVWUeqktaS7fSe7bEuV2Cqm3C3LNUMnPP1lCVeb2J3MTcVBcmuFFOV kW/16GKxfNS3rAo4JrvaSlzH6rGwyyEo+tSSGbZRLgBNC3wqg/7ah3jNkkEQYuQ5G/6j yZwg6BcRZd5MfOTy0+DQt3FhgRWiqH/tzRvh9gn+MVjBa2+yFqriequF6gEbwjDXNWbA rFUqYn2bf1bF/KsYpMXqwaB+5AZoCV+8lYiQEAOm5WkcyRdKrgRt3UxsBfayfSxwVMmh BmNw== X-Gm-Message-State: AOAM531QhLqBHkjOmarSLPlEnu3SvYg8qQUalPFGLPV2VIp63hrL//iy d/zo87z1AuQBtZI6qo+cU53KeQ== X-Google-Smtp-Source: ABdhPJwMUMajCWSxEXnVkYfknKU+dGYsenmvrM0qkhhwA3pG3r6bUDiyxS+dtaTDRrgSBmM0/+q7sg== X-Received: by 2002:aa7:88ca:0:b0:505:d092:16c8 with SMTP id k10-20020aa788ca000000b00505d09216c8mr6642112pff.22.1649758119472; Tue, 12 Apr 2022 03:08:39 -0700 (PDT) Received: from localhost.localdomain ([122.182.197.47]) by smtp.gmail.com with ESMTPSA id j9-20020a056a00130900b004f73df40914sm37515088pfu.82.2022.04.12.03.08.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Apr 2022 03:08:38 -0700 (PDT) From: Anup Patel To: Paolo Bonzini , Atish Patra Cc: Palmer Dabbelt , Paul Walmsley , Alistair Francis , Anup Patel , kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel Subject: [PATCH 3/6] RISC-V: KVM: Treat SBI HFENCE calls as NOPs Date: Tue, 12 Apr 2022 15:37:10 +0530 Message-Id: <20220412100713.1415094-4-apatel@ventanamicro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220412100713.1415094-1-apatel@ventanamicro.com> References: <20220412100713.1415094-1-apatel@ventanamicro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We should treat SBI HFENCE calls as NOPs until nested virtualization is supported by KVM RISC-V. This will help us test booting a hypervisor under KVM RISC-V. Signed-off-by: Anup Patel --- arch/riscv/kvm/vcpu_sbi_replace.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/riscv/kvm/vcpu_sbi_replace.c b/arch/riscv/kvm/vcpu_sbi_replace.c index 0f217365c287..3c1dcd38358e 100644 --- a/arch/riscv/kvm/vcpu_sbi_replace.c +++ b/arch/riscv/kvm/vcpu_sbi_replace.c @@ -117,7 +117,11 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID: case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA: case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID: - /* TODO: implement for nested hypervisor case */ + /* + * Until nested virtualization is implemented, the + * SBI HFENCE calls should be treated as NOPs + */ + break; default: ret = -EOPNOTSUPP; } -- 2.25.1