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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8BEEBC4332D for ; Fri, 20 Mar 2020 17:29:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 64D4E20722 for ; Fri, 20 Mar 2020 17:29:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RbkJQ8QQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727269AbgCTR27 (ORCPT ); Fri, 20 Mar 2020 13:28:59 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:35354 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727197AbgCTR27 (ORCPT ); Fri, 20 Mar 2020 13:28:59 -0400 Received: by mail-wm1-f68.google.com with SMTP id m3so7289552wmi.0; Fri, 20 Mar 2020 10:28:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=bF7ST+Uw4AP61YhxxvxFJK3psApCGN0GVo19aRVBb+k=; b=RbkJQ8QQKdMX25KSA2Et2VsxBEOhkKWd8C0EPVQwzaiZAFN5g8J7DK9bEWXsyF7yTy 2tOt3nYaMcIz/ubNAvPxA/0N1a+jqG7MNrn/iJUNZcyEyTgvlQ4kktJpud4nlaBgt3Rf lFOT3OCzL5KCHw5DDD9mUuxkGNeB7teAZ0UnkgZ6MpqtEI5o+jp1ltJOzwSGFBFz0zGx EqXgy06s9AXVzxxze3adyYR7MJLR72LZL3V0tzAPXtMTR2nCdCnk0kYR5mEmmuxY75NJ JejKiF89e3IOu/1ibgewwR2KfpR/B32rn5V6bbtcX4Hbh1u7SJXLgJAY/oVSujkZR8/Q JSMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bF7ST+Uw4AP61YhxxvxFJK3psApCGN0GVo19aRVBb+k=; b=AbXBoOJ9YJuKh+Wej9mMnlmlRVu6HUiHBOgwUubkOjEDL6QlBVfCBAhVtORrP33kkR +kiXVcPRpjINiMYTnCIZ3wtQm/L+9Deb5hjjO4uyepvYj3BntuA7HjTqhm3wuY3S68OM C2/JlxW+cvTxLgF9JHkfUYPqRPu/EkJaElH4rdQIWuuYkPU9UPulfYRMXQ+ZMOXpTZDQ d0T6D4a61PJdP9f8z9NIznXSaAQ9i9aN8JhFHuqwWZYTgmYpx9LXxjJzpgzT0g/fJuVy 4RnZMsJmFB16AmWTvuyu1Qioy9TB8OlT8dq0bA/vJIEkSiVyZV2Fq5ulq43Ce5osFGzZ mQvA== X-Gm-Message-State: ANhLgQ15BPXmjlzjV3mV7tApoIPvv98tsNAcmvL70uZvMnDMc2B5C/NN 8Ji2vuGsrwZH38BY25DRy+Vyw+uYcc4= X-Google-Smtp-Source: ADFU+vuPRAkCXWQGqIt8DiRO6X0wzcHXMyKhfH4/qINz4oo0MU24Q2dX5qcB01+Hl39yU6ChI4eoZA== X-Received: by 2002:a1c:25c5:: with SMTP id l188mr12027372wml.105.1584725335196; Fri, 20 Mar 2020 10:28:55 -0700 (PDT) Received: from jondnuc.lan (IGLD-84-229-155-229.inter.net.il. [84.229.155.229]) by smtp.gmail.com with ESMTPSA id q4sm11028333wmj.1.2020.03.20.10.28.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2020 10:28:54 -0700 (PDT) From: Jon Doron To: kvm@vger.kernel.org, linux-hyperv@vger.kernel.org Cc: vkuznets@redhat.com, Jon Doron Subject: [PATCH v9 6/6] x86/kvm/hyper-v: Add support for synthetic debugger via hypercalls Date: Fri, 20 Mar 2020 19:28:39 +0200 Message-Id: <20200320172839.1144395-7-arilou@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200320172839.1144395-1-arilou@gmail.com> References: <20200320172839.1144395-1-arilou@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org There is another mode for the synthetic debugger which uses hypercalls to send/recv network data instead of the MSR interface. This interface is much slower and less recommended since you might get a lot of VMExits while KDVM polling for new packets to recv, rather than simply checking the pending page to see if there is data avialble and then request. Signed-off-by: Jon Doron --- arch/x86/kvm/hyperv.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index c130a386f4c1..f17156d36419 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1829,6 +1829,34 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu) } ret = kvm_hv_send_ipi(vcpu, ingpa, outgpa, true, false); break; + case HVCALL_POST_DEBUG_DATA: + case HVCALL_RETRIEVE_DEBUG_DATA: + if (unlikely(fast)) { + ret = HV_STATUS_INVALID_PARAMETER; + break; + } + fallthrough; + case HVCALL_RESET_DEBUG_SESSION: { + struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu); + + if (!syndbg->active) { + ret = HV_STATUS_INVALID_HYPERCALL_CODE; + break; + } + + if (!(syndbg->options & HV_X64_SYNDBG_OPTION_USE_HCALLS)) { + ret = HV_STATUS_OPERATION_DENIED; + break; + } + vcpu->run->exit_reason = KVM_EXIT_HYPERV; + vcpu->run->hyperv.type = KVM_EXIT_HYPERV_HCALL; + vcpu->run->hyperv.u.hcall.input = param; + vcpu->run->hyperv.u.hcall.params[0] = ingpa; + vcpu->run->hyperv.u.hcall.params[1] = outgpa; + vcpu->arch.complete_userspace_io = + kvm_hv_hypercall_complete_userspace; + return 0; + } default: ret = HV_STATUS_INVALID_HYPERCALL_CODE; break; -- 2.24.1