From patchwork Tue Jun 4 06:43:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 13684780 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 6A057C41513 for ; Tue, 4 Jun 2024 06:49:29 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sENwn-0006Tw-S4; Tue, 04 Jun 2024 02:47:06 -0400 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 1sENvT-0004Ka-Om for qemu-devel@nongnu.org; Tue, 04 Jun 2024 02:45:48 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sENvR-0007ar-RZ for qemu-devel@nongnu.org; Tue, 04 Jun 2024 02:45:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1717483541; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=vMPOLamSRHQE7IaaVLuvYJHjbkszPghyVoT4hxWvYC4=; b=ek+jKqaauw2NZ3q9SOp/6VrBwK2oQj7uBwwHVdxOfh/s0pSRLr+Phg67jMDNhD72wIMSPm r64dcn/sM6KwiRusTp5X2MRq0Od2+OozJ+W5WObO4u3RwzyfdTLogf4oWXcCG0PUax0iD1 WNFPpcnSkiMDEXjPwb0x5lZpsHp0lF4= Received: from mail-ej1-f72.google.com (mail-ej1-f72.google.com [209.85.218.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-604-ydpJTyzvMMKKsquPwGO5iA-1; Tue, 04 Jun 2024 02:45:40 -0400 X-MC-Unique: ydpJTyzvMMKKsquPwGO5iA-1 Received: by mail-ej1-f72.google.com with SMTP id a640c23a62f3a-a68cc214ac7so103219166b.2 for ; Mon, 03 Jun 2024 23:45:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717483538; x=1718088338; 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=vMPOLamSRHQE7IaaVLuvYJHjbkszPghyVoT4hxWvYC4=; b=UE16a5tHuH8/2IbM1yOpBnWKp1E1w0B4WO5gsltoWCkQS9D2RxeaZzS5CGd6osDToB TDHLk34GPM3bYmOg9GBe+1EFE+QVkPFy8LCvN/fbKcsno6VwNifYk2vK2eO1lfaCDFdK beb/4oQtuQ98gaW6gK1EnXTBCkdq0VFa1z13r6GUOyLLHQUEtMEVhsmrfE3+GEe2ZhzH 8KHU/CaV1yfiuaOVMBBOlM2FVf3OvqsoBdLABpOXjwRT8v8Q/JFhFUg/yrtvx/oy6CLr kfOHmiwoS+8oRSigI9w0wqLxcZTgZFPEsOwsKcDCwIZGLYtHXeftiFRG9iqB0oBN8+4n Ts/w== X-Gm-Message-State: AOJu0YxjqLAfk1qf/WFKke+YLWJd6IaOtM417WutXQO2YDk4fXSPdBZc wHdBqObuKkft8DdfZ870eaLOTZw9ffxUAPhQio5oJkS/i+DHQQhd0p9l1lI4huKrMzifRsuhcPi k3JUgGtrlKTeOUNG9ua2HD/lDqSZg95al9Ex41CDxFXmy00V2MhOs9th0FdQUFZX2T2YDbNvK9K 4HYrtzFiFGhs4bxwdMyRTwEC21Gm+DzCbm85zy X-Received: by 2002:a17:906:f585:b0:a68:f0ce:9f2e with SMTP id a640c23a62f3a-a68f0cea079mr433530666b.44.1717483538240; Mon, 03 Jun 2024 23:45:38 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEKle5H+3DrBU9+OF2gPlcaVM44gOko9Z9cDrlWegkVah7ZgLJD1D73IM3Sb43xe69JS89bCg== X-Received: by 2002:a17:906:f585:b0:a68:f0ce:9f2e with SMTP id a640c23a62f3a-a68f0cea079mr433528566b.44.1717483537829; Mon, 03 Jun 2024 23:45:37 -0700 (PDT) Received: from avogadro.local ([151.81.115.112]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a69043af942sm277148966b.72.2024.06.03.23.45.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jun 2024 23:45:37 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Brijesh Singh , Michael Roth , Pankaj Gupta Subject: [PULL 30/45] i386/sev: Add handling to encrypt/finalize guest launch data Date: Tue, 4 Jun 2024 08:43:54 +0200 Message-ID: <20240604064409.957105-31-pbonzini@redhat.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240604064409.957105-1-pbonzini@redhat.com> References: <20240604064409.957105-1-pbonzini@redhat.com> MIME-Version: 1.0 Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Brijesh Singh Process any queued up launch data and encrypt/measure it into the SNP guest instance prior to initial guest launch. This also updates the KVM_SEV_SNP_LAUNCH_UPDATE call to handle partial update responses. Signed-off-by: Brijesh Singh Co-developed-by: Michael Roth Signed-off-by: Michael Roth Co-developed-by: Pankaj Gupta Signed-off-by: Pankaj Gupta Message-ID: <20240530111643.1091816-17-pankaj.gupta@amd.com> Signed-off-by: Paolo Bonzini --- target/i386/sev.c | 112 ++++++++++++++++++++++++++++++++++++++- target/i386/trace-events | 2 + 2 files changed, 113 insertions(+), 1 deletion(-) diff --git a/target/i386/sev.c b/target/i386/sev.c index e89b87d2f55..ef2e592ca76 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -756,6 +756,76 @@ out: return ret; } +static const char * +snp_page_type_to_str(int type) +{ + switch (type) { + case KVM_SEV_SNP_PAGE_TYPE_NORMAL: return "Normal"; + case KVM_SEV_SNP_PAGE_TYPE_ZERO: return "Zero"; + case KVM_SEV_SNP_PAGE_TYPE_UNMEASURED: return "Unmeasured"; + case KVM_SEV_SNP_PAGE_TYPE_SECRETS: return "Secrets"; + case KVM_SEV_SNP_PAGE_TYPE_CPUID: return "Cpuid"; + default: return "unknown"; + } +} + +static int +sev_snp_launch_update(SevSnpGuestState *sev_snp_guest, + SevLaunchUpdateData *data) +{ + int ret, fw_error; + struct kvm_sev_snp_launch_update update = {0}; + + if (!data->hva || !data->len) { + error_report("SNP_LAUNCH_UPDATE called with invalid address" + "/ length: %p / %lx", + data->hva, data->len); + return 1; + } + + update.uaddr = (__u64)(unsigned long)data->hva; + update.gfn_start = data->gpa >> TARGET_PAGE_BITS; + update.len = data->len; + update.type = data->type; + + /* + * KVM_SEV_SNP_LAUNCH_UPDATE requires that GPA ranges have the private + * memory attribute set in advance. + */ + ret = kvm_set_memory_attributes_private(data->gpa, data->len); + if (ret) { + error_report("SEV-SNP: failed to configure initial" + "private guest memory"); + goto out; + } + + while (update.len || ret == -EAGAIN) { + trace_kvm_sev_snp_launch_update(update.uaddr, update.gfn_start << + TARGET_PAGE_BITS, update.len, + snp_page_type_to_str(update.type)); + + ret = sev_ioctl(SEV_COMMON(sev_snp_guest)->sev_fd, + KVM_SEV_SNP_LAUNCH_UPDATE, + &update, &fw_error); + if (ret && ret != -EAGAIN) { + error_report("SNP_LAUNCH_UPDATE ret=%d fw_error=%d '%s'", + ret, fw_error, fw_error_to_str(fw_error)); + break; + } + } + +out: + if (!ret && update.gfn_start << TARGET_PAGE_BITS != data->gpa + data->len) { + error_report("SEV-SNP: expected update of GPA range %lx-%lx," + "got GPA range %lx-%llx", + data->gpa, data->gpa + data->len, data->gpa, + update.gfn_start << TARGET_PAGE_BITS); + ret = -EIO; + } + + return ret; +} + static int sev_launch_update_data(SevGuestState *sev_guest, uint8_t *addr, uint64_t len) { @@ -901,6 +971,46 @@ sev_launch_finish(SevCommonState *sev_common) migrate_add_blocker(&sev_mig_blocker, &error_fatal); } +static void +sev_snp_launch_finish(SevCommonState *sev_common) +{ + int ret, error; + Error *local_err = NULL; + SevLaunchUpdateData *data; + SevSnpGuestState *sev_snp = SEV_SNP_GUEST(sev_common); + struct kvm_sev_snp_launch_finish *finish = &sev_snp->kvm_finish_conf; + + QTAILQ_FOREACH(data, &launch_update, next) { + ret = sev_snp_launch_update(sev_snp, data); + if (ret) { + exit(1); + } + } + + trace_kvm_sev_snp_launch_finish(sev_snp->id_block, sev_snp->id_auth, + sev_snp->host_data); + ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_SNP_LAUNCH_FINISH, + finish, &error); + if (ret) { + error_report("SNP_LAUNCH_FINISH ret=%d fw_error=%d '%s'", + ret, error, fw_error_to_str(error)); + exit(1); + } + + sev_set_guest_state(sev_common, SEV_STATE_RUNNING); + + /* add migration blocker */ + error_setg(&sev_mig_blocker, + "SEV-SNP: Migration is not implemented"); + ret = migrate_add_blocker(&sev_mig_blocker, &local_err); + if (local_err) { + error_report_err(local_err); + error_free(sev_mig_blocker); + exit(1); + } +} + + static void sev_vm_state_change(void *opaque, bool running, RunState state) { @@ -1832,10 +1942,10 @@ sev_snp_guest_class_init(ObjectClass *oc, void *data) X86ConfidentialGuestClass *x86_klass = X86_CONFIDENTIAL_GUEST_CLASS(oc); klass->launch_start = sev_snp_launch_start; + klass->launch_finish = sev_snp_launch_finish; klass->kvm_init = sev_snp_kvm_init; x86_klass->kvm_type = sev_snp_kvm_type; - object_class_property_add(oc, "policy", "uint64", sev_snp_guest_get_policy, sev_snp_guest_set_policy, NULL, NULL); diff --git a/target/i386/trace-events b/target/i386/trace-events index cb26d8a9257..06b44ead2e2 100644 --- a/target/i386/trace-events +++ b/target/i386/trace-events @@ -12,3 +12,5 @@ kvm_sev_launch_finish(void) "" kvm_sev_launch_secret(uint64_t hpa, uint64_t hva, uint64_t secret, int len) "hpa 0x%" PRIx64 " hva 0x%" PRIx64 " data 0x%" PRIx64 " len %d" kvm_sev_attestation_report(const char *mnonce, const char *data) "mnonce %s data %s" kvm_sev_snp_launch_start(uint64_t policy, char *gosvw) "policy 0x%" PRIx64 " gosvw %s" +kvm_sev_snp_launch_update(uint64_t src, uint64_t gpa, uint64_t len, const char *type) "src 0x%" PRIx64 " gpa 0x%" PRIx64 " len 0x%" PRIx64 " (%s page)" +kvm_sev_snp_launch_finish(char *id_block, char *id_auth, char *host_data) "id_block %s id_auth %s host_data %s"