From nobody Tue Nov 26 19:42:49 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1706153870; cv=none; d=zohomail.com; s=zohoarc; b=ZmdMHMCRaHDIXh/yRmyS/464HMuwO0jucAb9MWt2nrFXhf6OAM6bBWHqdt9MAkuALvjiUpsivbv/Umezz5DpTcI0GRc7n8Howf0Ksq5IQpO+Su+keiqSegWQDcu6/w+zg34l1TKWSZEJ88CTiF0rhsFx5msBy3B27XxvsLdg3Xk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1706153870; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=CIlX0r91UBX9QuSFS2trNgYerTBJt/P8Xuid0DvaRXU=; b=PajDK0HPxEkXgAVMvYa5VdD2JJTMdpjIa1Vv8iD8WFpw+TfwnqwC6It+6ZHOAjh72274hR5qpCS1LgLIbS6F5DwbJ6PmRLsRpnzUK3nhHennmySzNWs1QLJHT0Pjpgcz0wOC/nj6nszAbkY3dfFU77U/pDO+DZL9XX43zxRuxeM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1706153870975958.6450583041411; Wed, 24 Jan 2024 19:37:50 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSqSy-0005mS-1D; Wed, 24 Jan 2024 22:31:48 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqSb-0005Lf-9l for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:31:26 -0500 Received: from mgamail.intel.com ([192.198.163.10]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqSW-0001Dr-GO for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:31:24 -0500 Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2024 19:28:12 -0800 Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orviesa005.jf.intel.com with ESMTP; 24 Jan 2024 19:28:06 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706153480; x=1737689480; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cFDdRJq7x7Q2vvZO3JoCS5Qlpsvshit/wI+5qgyo6o0=; b=Vy4bhYZKKm5jC/GIxAqS5i0INvhSM6CqR/koeEVu2q/e8ORic+ILYF01 8Jd9idEyiv9+bTd3UNX69RSG5wgH8nF3iUgrV794MtUxANBOHZwH5Vn14 VYlY/Fub1/V6cLC5iDrLSl6FPCw4pi8IpJ+ZFfApPogUbWlnP1CkAtiFf S/2UyEqq/CI8Ooq9WuHSo1vtOoK5OJ9SEMY5baVslzsChIStkK+8A95NO xYpzM6f2q8xnqGRcpCvMFN7FZWUhylCiggT15NayscVKsd3Pdd/HUzC+x VMpTopBXmgLSLkdwfXGSuoNgjP6JC2DGqRdniZLl4VlVyvbPQ97k6JpwG w==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="9430002" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="9430002" X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="2086114" From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Cornelia Huck , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com, Michael Roth , Sean Christopherson , Claudio Fontana , Gerd Hoffmann , Isaku Yamahata , Chenyi Qiang Subject: [PATCH v4 50/66] i386/tdx: handle TDG.VP.VMCALL Date: Wed, 24 Jan 2024 22:23:12 -0500 Message-Id: <20240125032328.2522472-51-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125032328.2522472-1-xiaoyao.li@intel.com> References: <20240125032328.2522472-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.198.163.10; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.5, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.999, HK_RANDOM_FROM=1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1706153871450100011 Content-Type: text/plain; charset="utf-8" From: Isaku Yamahata Add property "quote-generation-socket" to tdx-guest, which is a property of type SocketAddress to specify Quote Generation Service(QGS). On request of GetQuote, it connects to the QGS socket, read request data from shared guest memory, send the request data to the QGS, and store the response into shared guest memory, at last notify TD guest by interrupt. command line example: qemu-system-x86_64 \ -object '{"qom-type":"tdx-guest","id":"tdx0","quote-generation-socket":= {"type": "vsock", "cid":"1","port":"1234"}}' \ -machine confidential-guest-support=3Dtdx0 Note, above example uses vsock type socket because the QGS we used implements the vsock socket. It can be other types, like UNIX socket, which depends on the implementation of QGS. To avoid no response from QGS server, setup a timer for the transaction. If timeout, make it an error and interrupt guest. Define the threshold of time to 30s at present, maybe change to other value if not appropriate. Signed-off-by: Isaku Yamahata Codeveloped-by: Chenyi Qiang Signed-off-by: Chenyi Qiang Codeveloped-by: Xiaoyao Li Signed-off-by: Xiaoyao Li --- Changes in v4: - merge next patch "i386/tdx: setup a timer for the qio channel"; Changes in v3: - rename property "quote-generation-service" to "quote-generation-socket"; - change the type of "quote-generation-socket" from str to SocketAddress; - squash next patch into this one; --- qapi/qom.json | 6 +- target/i386/kvm/meson.build | 2 +- target/i386/kvm/tdx-quote-generator.c | 170 ++++++++++++++++++++ target/i386/kvm/tdx-quote-generator.h | 95 +++++++++++ target/i386/kvm/tdx.c | 216 ++++++++++++++++++++++++++ target/i386/kvm/tdx.h | 6 + 6 files changed, 493 insertions(+), 2 deletions(-) create mode 100644 target/i386/kvm/tdx-quote-generator.c create mode 100644 target/i386/kvm/tdx-quote-generator.h diff --git a/qapi/qom.json b/qapi/qom.json index 15445f9e41fc..c60fb5710961 100644 --- a/qapi/qom.json +++ b/qapi/qom.json @@ -914,13 +914,17 @@ # e.g., specific to the workload rather than the run-time or OS. # base64 encoded SHA384 digest. # +# @quote-generation-socket: socket address for Quote Generation +# Service(QGS) +# # Since: 9.0 ## { 'struct': 'TdxGuestProperties', 'data': { '*sept-ve-disable': 'bool', '*mrconfigid': 'str', '*mrowner': 'str', - '*mrownerconfig': 'str' } } + '*mrownerconfig': 'str', + '*quote-generation-socket': 'SocketAddress' } } =20 ## # @ThreadContextProperties: diff --git a/target/i386/kvm/meson.build b/target/i386/kvm/meson.build index 30a90b4d371d..2fd7c27b76c4 100644 --- a/target/i386/kvm/meson.build +++ b/target/i386/kvm/meson.build @@ -9,7 +9,7 @@ i386_kvm_ss.add(when: 'CONFIG_XEN_EMU', if_true: files('xen= -emu.c')) =20 i386_kvm_ss.add(when: 'CONFIG_SEV', if_false: files('sev-stub.c')) =20 -i386_kvm_ss.add(when: 'CONFIG_TDX', if_true: files('tdx.c'), if_false: fil= es('tdx-stub.c')) +i386_kvm_ss.add(when: 'CONFIG_TDX', if_true: files('tdx.c', 'tdx-quote-gen= erator.c'), if_false: files('tdx-stub.c')) =20 i386_system_ss.add(when: 'CONFIG_HYPERV', if_true: files('hyperv.c'), if_f= alse: files('hyperv-stub.c')) =20 diff --git a/target/i386/kvm/tdx-quote-generator.c b/target/i386/kvm/tdx-qu= ote-generator.c new file mode 100644 index 000000000000..057ad09e7e95 --- /dev/null +++ b/target/i386/kvm/tdx-quote-generator.c @@ -0,0 +1,170 @@ +/* + * QEMU TDX support + * + * Copyright Intel + * + * Author: + * Xiaoyao Li + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory + * + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "qapi/error.h" +#include "qapi/qapi-visit-sockets.h" + +#include "tdx-quote-generator.h" + +typedef struct TdxQuoteGeneratorClass { + DeviceClass parent_class; +} TdxQuoteGeneratorClass; + +OBJECT_DEFINE_TYPE(TdxQuoteGenerator, tdx_quote_generator, TDX_QUOTE_GENER= ATOR, OBJECT) + +static void tdx_quote_generator_finalize(Object *obj) +{ +} + +static void tdx_quote_generator_class_init(ObjectClass *oc, void *data) +{ +} + +static void tdx_quote_generator_init(Object *obj) +{ +} + +static void tdx_generate_quote_cleanup(struct tdx_generate_quote_task *tas= k) +{ + timer_del(&task->timer); + + g_source_remove(task->watch); + qio_channel_close(QIO_CHANNEL(task->sioc), NULL); + object_unref(OBJECT(task->sioc)); + + /* Maintain the number of in-flight requests. */ + qemu_mutex_lock(&task->quote_gen->lock); + task->quote_gen->num--; + qemu_mutex_unlock(&task->quote_gen->lock); + + task->completion(task); +} + +static gboolean tdx_get_quote_read(QIOChannel *ioc, GIOCondition condition, + gpointer opaque) +{ + struct tdx_generate_quote_task *task =3D opaque; + Error *err =3D NULL; + int ret; + + ret =3D qio_channel_read(ioc, task->receive_buf + task->receive_buf_re= ceived, + task->payload_len - task->receive_buf_received,= &err); + if (ret < 0) { + if (ret =3D=3D QIO_CHANNEL_ERR_BLOCK) { + return G_SOURCE_CONTINUE; + } else { + error_report_err(err); + task->status_code =3D TDX_VP_GET_QUOTE_ERROR; + goto end; + } + } + + task->receive_buf_received +=3D ret; + if (ret =3D=3D 0 || task->receive_buf_received =3D=3D task->payload_le= n) { + task->status_code =3D TDX_VP_GET_QUOTE_SUCCESS; + goto end; + } + + return G_SOURCE_CONTINUE; + +end: + tdx_generate_quote_cleanup(task); + return G_SOURCE_REMOVE; +} + +static gboolean tdx_send_report(QIOChannel *ioc, GIOCondition condition, + gpointer opaque) +{ + struct tdx_generate_quote_task *task =3D opaque; + Error *err =3D NULL; + int ret; + + ret =3D qio_channel_write(ioc, task->send_data + task->send_data_sent, + task->send_data_size - task->send_data_sent, &= err); + if (ret < 0) { + if (ret =3D=3D QIO_CHANNEL_ERR_BLOCK) { + ret =3D 0; + } else { + error_report_err(err); + task->status_code =3D TDX_VP_GET_QUOTE_ERROR; + tdx_generate_quote_cleanup(task); + goto end; + } + } + task->send_data_sent +=3D ret; + + if (task->send_data_sent =3D=3D task->send_data_size) { + task->watch =3D qio_channel_add_watch(QIO_CHANNEL(task->sioc), G_I= O_IN, + tdx_get_quote_read, task, NULL= ); + goto end; + } + + return G_SOURCE_CONTINUE; + +end: + return G_SOURCE_REMOVE; +} + +static void tdx_quote_generator_connected(QIOTask *qio_task, gpointer opaq= ue) +{ + struct tdx_generate_quote_task *task =3D opaque; + Error *err =3D NULL; + int ret; + + ret =3D qio_task_propagate_error(qio_task, &err); + if (ret) { + error_report_err(err); + task->status_code =3D TDX_VP_GET_QUOTE_QGS_UNAVAILABLE; + tdx_generate_quote_cleanup(task); + return; + } + + task->watch =3D qio_channel_add_watch(QIO_CHANNEL(task->sioc), G_IO_OU= T, + tdx_send_report, task, NULL); +} + +#define TRANSACTION_TIMEOUT 30000 + +static void getquote_expired(void *opaque) +{ + struct tdx_generate_quote_task *task =3D opaque; + + task->status_code =3D TDX_VP_GET_QUOTE_ERROR; + tdx_generate_quote_cleanup(task); +} + +static void setup_get_quote_timer(struct tdx_generate_quote_task *task) +{ + int64_t time; + + timer_init_ms(&task->timer, QEMU_CLOCK_VIRTUAL, getquote_expired, task= ); + time =3D qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); + timer_mod(&task->timer, time + TRANSACTION_TIMEOUT); +} + +void tdx_generate_quote(struct tdx_generate_quote_task *task) +{ + struct TdxQuoteGenerator *quote_gen =3D task->quote_gen; + QIOChannelSocket *sioc; + + sioc =3D qio_channel_socket_new(); + task->sioc =3D sioc; + + setup_get_quote_timer(task); + + qio_channel_socket_connect_async(sioc, quote_gen->socket, + tdx_quote_generator_connected, task, + NULL, NULL); +} diff --git a/target/i386/kvm/tdx-quote-generator.h b/target/i386/kvm/tdx-qu= ote-generator.h new file mode 100644 index 000000000000..54899d44aa6f --- /dev/null +++ b/target/i386/kvm/tdx-quote-generator.h @@ -0,0 +1,95 @@ +#ifndef QEMU_I386_TDX_QUOTE_GENERATOR_H +#define QEMU_I386_TDX_QUOTE_GENERATOR_H + +#include "qom/object_interfaces.h" +#include "io/channel-socket.h" +#include "exec/hwaddr.h" + +/* tdx quote generation */ +struct TdxQuoteGenerator { + Object parent_obj; + + int num; + SocketAddress *socket; + + QemuMutex lock; +}; + +#define TYPE_TDX_QUOTE_GENERATOR "tdx-quote-generator" + +OBJECT_DECLARE_SIMPLE_TYPE(TdxQuoteGenerator, TDX_QUOTE_GENERATOR) + + +#define TDX_GET_QUOTE_STRUCTURE_VERSION 1ULL + +#define TDX_VP_GET_QUOTE_SUCCESS 0ULL +#define TDX_VP_GET_QUOTE_IN_FLIGHT (-1ULL) +#define TDX_VP_GET_QUOTE_ERROR 0x8000000000000000ULL +#define TDX_VP_GET_QUOTE_QGS_UNAVAILABLE 0x8000000000000001ULL + +/* Limit to avoid resource starvation. */ +#define TDX_GET_QUOTE_MAX_BUF_LEN (128 * 1024) +#define TDX_MAX_GET_QUOTE_REQUEST 16 + +#define TDX_GET_QUOTE_HDR_SIZE 24 + +/* Format of pages shared with guest. */ +struct tdx_get_quote_header { + /* Format version: must be 1 in little endian. */ + uint64_t structure_version; + + /* + * GetQuote status code in little endian: + * Guest must set error_code to 0 to avoid information leak. + * Qemu sets this before interrupting guest. + */ + uint64_t error_code; + + /* + * in-message size in little endian: The message will follow this head= er. + * The in-message will be send to QGS. + */ + uint32_t in_len; + + /* + * out-message size in little endian: + * On request, out_len must be zero to avoid information leak. + * On return, message size from QGS. Qemu overwrites this field. + * The message will follows this header. The in-message is overwritte= n. + */ + uint32_t out_len; + + /* + * Message buffer follows. + * Guest sets message that will be send to QGS. If out_len > in_len, = guest + * should zero remaining buffer to avoid information leak. + * Qemu overwrites this buffer with a message returned from QGS. + */ +}; + +struct tdx_generate_quote_task { + hwaddr buf_gpa; + hwaddr payload_gpa; + uint64_t payload_len; + + char *send_data; + uint64_t send_data_size; + uint64_t send_data_sent; + + char *receive_buf; + uint64_t receive_buf_received; + + uint64_t status_code; + struct tdx_get_quote_header hdr; + + QIOChannelSocket *sioc; + guint watch; + QEMUTimer timer; + struct TdxQuoteGenerator *quote_gen; + + void (*completion)(struct tdx_generate_quote_task *task); +}; + +void tdx_generate_quote(struct tdx_generate_quote_task *task); + +#endif /* QEMU_I386_TDX_QUOTE_GENERATOR_H */ diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index 602b5656d462..d27e775eec5d 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -16,6 +16,7 @@ #include "qemu/base64.h" #include "qemu/mmap-alloc.h" #include "qapi/error.h" +#include "qapi/qapi-visit-sockets.h" #include "qom/object_interfaces.h" #include "standard-headers/asm-x86/kvm_para.h" #include "sysemu/kvm.h" @@ -23,12 +24,16 @@ #include "exec/address-spaces.h" #include "exec/ramblock.h" =20 +#include "hw/i386/apic_internal.h" +#include "hw/i386/apic-msidef.h" #include "hw/i386/e820_memory_layout.h" #include "hw/i386/x86.h" #include "hw/i386/tdvf.h" #include "hw/i386/tdvf-hob.h" +#include "hw/pci/msi.h" #include "kvm_i386.h" #include "tdx.h" +#include "tdx-quote-generator.h" #include "../cpu-internal.h" =20 #define TDX_SUPPORTED_KVM_FEATURES ((1U << KVM_FEATURE_NOP_IO_DELAY) | \ @@ -852,6 +857,175 @@ int tdx_parse_tdvf(void *flash_ptr, int size) return tdvf_parse_metadata(&tdx_guest->tdvf, flash_ptr, size); } =20 +static void tdx_inject_interrupt(uint32_t apicid, uint32_t vector) +{ + int ret; + + if (vector < 32 || vector > 255) { + return; + } + + MSIMessage msg =3D { + .address =3D ((apicid & 0xff) << MSI_ADDR_DEST_ID_SHIFT) | + (((uint64_t)apicid & 0xffffff00) << 32), + .data =3D vector | (APIC_DM_FIXED << MSI_DATA_DELIVERY_MODE_SHIFT), + }; + + ret =3D kvm_irqchip_send_msi(kvm_state, msg); + if (ret < 0) { + /* In this case, no better way to tell it to guest. Log it. */ + error_report("TDX: injection %d failed, interrupt lost (%s).\n", + vector, strerror(-ret)); + } +} + +static hwaddr tdx_shared_bit(X86CPU *cpu) +{ + return (cpu->phys_bits > 48) ? BIT_ULL(51) : BIT_ULL(47); +} + +static void tdx_get_quote_completion(struct tdx_generate_quote_task *task) +{ + int ret; + + if (task->status_code =3D=3D TDX_VP_GET_QUOTE_SUCCESS) { + ret =3D address_space_write(&address_space_memory, task->payload_g= pa, + MEMTXATTRS_UNSPECIFIED, task->receive_bu= f, + task->receive_buf_received); + if (ret !=3D MEMTX_OK) { + error_report("TDX: get-quote: failed to write quote data.\n"); + } else { + task->hdr.out_len =3D cpu_to_le64(task->receive_buf_received); + } + } + task->hdr.error_code =3D cpu_to_le32(task->status_code); + + /* Publish the response contents before marking this request completed= . */ + smp_wmb(); + ret =3D address_space_write(&address_space_memory, task->buf_gpa, + MEMTXATTRS_UNSPECIFIED, &task->hdr, + TDX_GET_QUOTE_HDR_SIZE); + if (ret !=3D MEMTX_OK) { + error_report("TDX: get-quote: failed to update GetQuote header."); + } + + tdx_inject_interrupt(tdx_guest->event_notify_apicid, + tdx_guest->event_notify_vector); + + g_free(task->send_data); + g_free(task->receive_buf); + g_free(task); +} + +static int tdx_handle_get_quote(X86CPU *cpu, struct kvm_tdx_vmcall *vmcall) +{ + struct tdx_generate_quote_task *task; + struct tdx_get_quote_header hdr; + hwaddr buf_gpa =3D vmcall->in_r12; + uint64_t buf_len =3D vmcall->in_r13; + + QEMU_BUILD_BUG_ON(sizeof(struct tdx_get_quote_header) !=3D TDX_GET_QUO= TE_HDR_SIZE); + + vmcall->status_code =3D TDG_VP_VMCALL_INVALID_OPERAND; + + if (buf_len =3D=3D 0) { + return 0; + } + + /* GPA must be shared. */ + if (!(buf_gpa & tdx_shared_bit(cpu))) { + return 0; + } + buf_gpa &=3D ~tdx_shared_bit(cpu); + + if (!QEMU_IS_ALIGNED(buf_gpa, 4096) || !QEMU_IS_ALIGNED(buf_len, 4096)= ) { + vmcall->status_code =3D TDG_VP_VMCALL_ALIGN_ERROR; + return 0; + } + + if (address_space_read(&address_space_memory, buf_gpa, MEMTXATTRS_UNSP= ECIFIED, + &hdr, TDX_GET_QUOTE_HDR_SIZE) !=3D MEMTX_OK) { + error_report("TDX: get-quote: failed to read GetQuote header.\n"); + return -1; + } + + if (le64_to_cpu(hdr.structure_version) !=3D TDX_GET_QUOTE_STRUCTURE_VE= RSION) { + return 0; + } + + /* + * Paranoid: Guest should clear error_code and out_len to avoid inform= ation + * leak. Enforce it. The initial value of them doesn't matter for qe= mu to + * process the request. + */ + if (le64_to_cpu(hdr.error_code) !=3D TDX_VP_GET_QUOTE_SUCCESS || + le32_to_cpu(hdr.out_len) !=3D 0) { + return 0; + } + + /* Only safe-guard check to avoid too large buffer size. */ + if (buf_len > TDX_GET_QUOTE_MAX_BUF_LEN || + le32_to_cpu(hdr.in_len) > buf_len - TDX_GET_QUOTE_HDR_SIZE) { + return 0; + } + + vmcall->status_code =3D TDG_VP_VMCALL_SUCCESS; + if (!tdx_guest->quote_generator) { + hdr.error_code =3D cpu_to_le64(TDX_VP_GET_QUOTE_QGS_UNAVAILABLE); + if (address_space_write(&address_space_memory, buf_gpa, + MEMTXATTRS_UNSPECIFIED, + &hdr, TDX_GET_QUOTE_HDR_SIZE) !=3D MEMTX_O= K) { + error_report("TDX: failed to update GetQuote header.\n"); + return -1; + } + return 0; + } + + qemu_mutex_lock(&tdx_guest->quote_generator->lock); + if (tdx_guest->quote_generator->num >=3D TDX_MAX_GET_QUOTE_REQUEST) { + qemu_mutex_unlock(&tdx_guest->quote_generator->lock); + vmcall->status_code =3D TDG_VP_VMCALL_RETRY; + return 0; + } + tdx_guest->quote_generator->num++; + qemu_mutex_unlock(&tdx_guest->quote_generator->lock); + + /* Mark the buffer in-flight. */ + hdr.error_code =3D cpu_to_le64(TDX_VP_GET_QUOTE_IN_FLIGHT); + if (address_space_write(&address_space_memory, buf_gpa, + MEMTXATTRS_UNSPECIFIED, + &hdr, TDX_GET_QUOTE_HDR_SIZE) !=3D MEMTX_OK) { + error_report("TDX: failed to update GetQuote header.\n"); + return -1; + } + + task =3D g_malloc(sizeof(*task)); + task->buf_gpa =3D buf_gpa; + task->payload_gpa =3D buf_gpa + TDX_GET_QUOTE_HDR_SIZE; + task->payload_len =3D buf_len - TDX_GET_QUOTE_HDR_SIZE; + task->hdr =3D hdr; + task->quote_gen =3D tdx_guest->quote_generator; + task->completion =3D tdx_get_quote_completion; + + task->send_data_size =3D le32_to_cpu(hdr.in_len); + task->send_data =3D g_malloc(task->send_data_size); + task->send_data_sent =3D 0; + + if (address_space_read(&address_space_memory, task->payload_gpa, + MEMTXATTRS_UNSPECIFIED, task->send_data, + task->send_data_size) !=3D MEMTX_OK) { + g_free(task->send_data); + return -1; + } + + task->receive_buf =3D g_malloc0(task->payload_len); + task->receive_buf_received =3D 0; + + tdx_generate_quote(task); + + return 0; +} + static int tdx_handle_setup_event_notify_interrupt(X86CPU *cpu, struct kvm_tdx_vmcall *= vmcall) { @@ -882,6 +1056,8 @@ static int tdx_handle_vmcall(X86CPU *cpu, struct kvm_t= dx_vmcall *vmcall) } =20 switch (vmcall->subfunction) { + case TDG_VP_VMCALL_GET_QUOTE: + return tdx_handle_get_quote(cpu, vmcall); case TDG_VP_VMCALL_SETUP_EVENT_NOTIFY_INTERRUPT: return tdx_handle_setup_event_notify_interrupt(cpu, vmcall); default: @@ -978,6 +1154,40 @@ static void tdx_guest_set_mrownerconfig(Object *obj, = const char *value, Error ** tdx->mrownerconfig =3D g_strdup(value); } =20 +static void tdx_guest_get_quote_generation(Object *obj, Visitor *v, + const char *name, void *opaque, + Error **errp) +{ + TdxGuest *tdx =3D TDX_GUEST(obj); + + visit_type_SocketAddress(v, name, &tdx->quote_generator->socket, errp); +} + +static void tdx_guest_set_quote_generation(Object *obj, Visitor *v, + const char *name, void *opaque, + Error **errp) +{ + TdxGuest *tdx =3D TDX_GUEST(obj); + SocketAddress *sock =3D NULL; + Object *qg_obj; + TdxQuoteGenerator *quote_generator; + + if (!visit_type_SocketAddress(v, name, &sock, errp)) { + return; + } + + if (tdx->quote_generator) { + object_unref(tdx->quote_generator); + } + + qg_obj =3D object_new(TYPE_TDX_QUOTE_GENERATOR); + quote_generator =3D TDX_QUOTE_GENERATOR(qg_obj); + quote_generator->socket =3D sock; + qemu_mutex_init("e_generator->lock); + + tdx->quote_generator =3D quote_generator; +} + /* tdx guest */ OBJECT_DEFINE_TYPE_WITH_INTERFACES(TdxGuest, tdx_guest, @@ -1012,6 +1222,12 @@ static void tdx_guest_init(Object *obj) tdx_guest_get_mrownerconfig, tdx_guest_set_mrownerconfig); =20 + tdx->quote_generator =3D NULL; + object_property_add(obj, "quote-generation-socket", "SocketAddress", + tdx_guest_get_quote_generation, + tdx_guest_set_quote_generation, + NULL, NULL); + tdx->event_notify_vector =3D -1; tdx->event_notify_apicid =3D -1; } diff --git a/target/i386/kvm/tdx.h b/target/i386/kvm/tdx.h index 992916e4c905..c6e4c275262d 100644 --- a/target/i386/kvm/tdx.h +++ b/target/i386/kvm/tdx.h @@ -9,6 +9,8 @@ #include "hw/i386/tdvf.h" #include "sysemu/kvm.h" =20 +#include "tdx-quote-generator.h" + #define TYPE_TDX_GUEST "tdx-guest" #define TDX_GUEST(obj) OBJECT_CHECK(TdxGuest, (obj), TYPE_TDX_GUEST) =20 @@ -16,6 +18,7 @@ typedef struct TdxGuestClass { ConfidentialGuestSupportClass parent_class; } TdxGuestClass; =20 +#define TDG_VP_VMCALL_GET_QUOTE 0x10002ULL #define TDG_VP_VMCALL_SETUP_EVENT_NOTIFY_INTERRUPT 0x10004ULL =20 #define TDG_VP_VMCALL_SUCCESS 0x0000000000000000ULL @@ -55,6 +58,9 @@ typedef struct TdxGuest { /* runtime state */ uint32_t event_notify_vector; uint32_t event_notify_apicid; + + /* GetQuote */ + TdxQuoteGenerator *quote_generator; } TdxGuest; =20 #ifdef CONFIG_TDX --=20 2.34.1