From nobody Mon Feb 9 14:20:36 2026 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 52F29C43334 for ; Mon, 27 Jun 2022 21:59:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242230AbiF0V7m (ORCPT ); Mon, 27 Jun 2022 17:59:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241519AbiF0Vzb (ORCPT ); Mon, 27 Jun 2022 17:55:31 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B316BDECF; Mon, 27 Jun 2022 14:55:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1656366902; x=1687902902; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=YTRyMTy4Cbklvo2axfnNj1XLWBlbWaoRN/EJpr2hGEo=; b=LPXa6aXLJNVkVV1mv0qcuePg+wIzndrbc168IwJhJfKNCjeK1BjCGLFm 77VdiQwTnt5j+lU/sC0PjP99epgBtuOLdiPa9rqcWNxHZKCy/9pbBKFb4 zBXIOfENj7PZ22ONhhVuBeJjIdTl1nSm2tRT69ppOeKQ9BrTZPJrjeYKQ sw/5LKSWSF8GY50OQxajNO/Py+i8DyYjMCMdd/M9TJsVr5bjCLaLoz2i5 16UCZLszhpKxy68qKUDauZtrrfA2Rh1d/whBl0lsGuFl3YYAv3OTkOKDu uQ8PEvhg74zm+bKEu0qIENPTmEMyfAARHBPbA1DAB5MlOdp+iGEFj6J6X Q==; X-IronPort-AV: E=McAfee;i="6400,9594,10391"; a="279116113" X-IronPort-AV: E=Sophos;i="5.92,227,1650956400"; d="scan'208";a="279116113" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2022 14:54:58 -0700 X-IronPort-AV: E=Sophos;i="5.92,227,1650956400"; d="scan'208";a="657863667" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2022 14:54:58 -0700 From: isaku.yamahata@intel.com To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Paolo Bonzini Subject: [PATCH v7 071/102] KVM: TDX: restore debug store when TD exit Date: Mon, 27 Jun 2022 14:54:03 -0700 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Isaku Yamahata Because debug store is clobbered, restore it on TD exit. Signed-off-by: Isaku Yamahata Reviewed-by: Paolo Bonzini --- arch/x86/events/intel/ds.c | 1 + arch/x86/kvm/vmx/tdx.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index 376cc3d66094..cdba4227ad3b 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -2256,3 +2256,4 @@ void perf_restore_debug_store(void) =20 wrmsrl(MSR_IA32_DS_AREA, (unsigned long)ds); } +EXPORT_SYMBOL_GPL(perf_restore_debug_store); diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index c9cb9670f7cf..0de113a643e4 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -663,6 +663,7 @@ fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu) tdx_vcpu_enter_exit(vcpu, tdx); =20 tdx_user_return_update_cache(); + perf_restore_debug_store(); tdx_restore_host_xsave_state(vcpu); tdx->host_state_need_restore =3D true; =20 --=20 2.25.1