From patchwork Tue Feb 16 02:13:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isaku Yamahata X-Patchwork-Id: 12089453 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 2CF6CC43381 for ; Tue, 16 Feb 2021 02:19:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0AFA764DF4 for ; Tue, 16 Feb 2021 02:19:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230077AbhBPCTl (ORCPT ); Mon, 15 Feb 2021 21:19:41 -0500 Received: from mga06.intel.com ([134.134.136.31]:39373 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229977AbhBPCRA (ORCPT ); Mon, 15 Feb 2021 21:17:00 -0500 IronPort-SDR: 5dPLPtRBfs6IVkKKLQggkcqJ0YQVAuXwWYCZUradwIG87XpfKm1eXaV+pGD5Yjuvh4HJAl05VZ r4wmTVj83mXw== X-IronPort-AV: E=McAfee;i="6000,8403,9896"; a="244270209" X-IronPort-AV: E=Sophos;i="5.81,182,1610438400"; d="scan'208";a="244270209" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2021 18:14:52 -0800 IronPort-SDR: bTa1V5nNWnVHlu6obW20lt5sVgr0Pj1YcFNm5PpOHi1oRbxr5dqA8HeXEGI8aoHUWBMRFVGeCN gy31Vn4/T52w== X-IronPort-AV: E=Sophos;i="5.81,182,1610438400"; d="scan'208";a="591705429" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Feb 2021 18:14:52 -0800 From: Isaku Yamahata To: qemu-devel@nongnu.org, pbonzini@redhat.com, alistair@alistair23.me, ehabkost@redhat.com, marcel.apfelbaum@gmail.com, mst@redhat.com, cohuck@redhat.com, mtosatti@redhat.com, xiaoyao.li@intel.com, seanjc@google.com Cc: kvm@vger.kernel.org, isaku.yamahata@gmail.com, isaku.yamahata@intel.com, Sean Christopherson Subject: [RFC PATCH 15/23] i386/tdx: Add hook to require generic device loader Date: Mon, 15 Feb 2021 18:13:11 -0800 Message-Id: <2ea61dad121c2ec89597b3b6dbfe538be22ac2cc.1613188118.git.isaku.yamahata@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Sean Christopherson Add a hook for TDX to denote that the TD Virtual Firmware must be provided via the "generic" device loader. Error out if pflash is used in conjuction with TDX. Suggested-by: Isaku Yamahata Signed-off-by: Sean Christopherson --- hw/i386/pc_sysfw.c | 6 ++++++ include/sysemu/tdx.h | 2 ++ target/i386/kvm/tdx-stub.c | 5 +++++ target/i386/kvm/tdx.c | 25 +++++++++++++++++++++++++ 4 files changed, 38 insertions(+) diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c index 11172214f1..65eed485ff 100644 --- a/hw/i386/pc_sysfw.c +++ b/hw/i386/pc_sysfw.c @@ -39,6 +39,7 @@ #include "hw/block/flash.h" #include "sysemu/kvm.h" #include "sysemu/sev.h" +#include "sysemu/tdx.h" #define FLASH_SECTOR_SIZE 4096 @@ -207,6 +208,11 @@ void pc_system_firmware_init(PCMachineState *pcms, int i; BlockBackend *pflash_blk[ARRAY_SIZE(pcms->flash)]; + if (!tdx_system_firmware_init(pcms, rom_memory)) { + pc_system_flash_cleanup_unused(pcms); + return; + } + if (!pcmc->pci_enabled) { x86_bios_rom_init(MACHINE(pcms), "bios.bin", rom_memory, true); return; diff --git a/include/sysemu/tdx.h b/include/sysemu/tdx.h index 03461b6ae8..70eb01348f 100644 --- a/include/sysemu/tdx.h +++ b/include/sysemu/tdx.h @@ -3,8 +3,10 @@ #ifndef CONFIG_USER_ONLY #include "sysemu/kvm.h" +#include "hw/i386/pc.h" bool kvm_has_tdx(KVMState *s); +int tdx_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory); #endif void tdx_pre_create_vcpu(CPUState *cpu); diff --git a/target/i386/kvm/tdx-stub.c b/target/i386/kvm/tdx-stub.c index 93afe07ddb..4e1a0a4280 100644 --- a/target/i386/kvm/tdx-stub.c +++ b/target/i386/kvm/tdx-stub.c @@ -7,6 +7,11 @@ bool kvm_has_tdx(KVMState *s) { return false; } + +int tdx_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory) +{ + return -ENOSYS; +} #endif void tdx_pre_create_vcpu(CPUState *cpu) diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index d095dab662..e8cd2a7672 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -106,6 +106,31 @@ int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp) return 0; } +int tdx_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory) +{ + MachineState *ms = MACHINE(pcms); + TdxGuest *tdx = (TdxGuest *)object_dynamic_cast(OBJECT(ms->cgs), + TYPE_TDX_GUEST); + int i; + + if (!tdx) { + return -ENOSYS; + } + + /* + * Sanitiy check for tdx: + * TDX uses generic loader to load bios instead of pflash. + */ + for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) { + if (drive_get(IF_PFLASH, 0, i)) { + error_report("pflash not supported by VM type, " + "use -device loader,file="); + exit(1); + } + } + return 0; +} + void tdx_get_supported_cpuid(KVMState *s, uint32_t function, uint32_t index, int reg, uint32_t *ret) {