From nobody Mon Feb 9 13:59:04 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 AEB50C0015E for ; Tue, 25 Jul 2023 22:21:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232471AbjGYWV3 (ORCPT ); Tue, 25 Jul 2023 18:21:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232467AbjGYWT6 (ORCPT ); Tue, 25 Jul 2023 18:19:58 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BD6E49CF; Tue, 25 Jul 2023 15:17:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690323420; x=1721859420; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hN9pn4xLjC0uRDj1rBgILXa96lY/y2sl8BLB+qTChQs=; b=ghL23Os5EAbzmZBjRJcaf7lyJ955buYaNCNcvjvTPs++MOVeQysGaj8R TcQ9QGgnX/QaAYmBmlwNMY5kf0SAwQDSxHdWg0b3JWvvVJgctV1CH8Ztq s6u3vT4NO7a7aLQsqa5/v7rsfq/L+NiPVfJMhzecnCl9iDtuFphbT+lXx nqhI+Mgkg9GtLvy1b6YwX8HUGuOyjFu2hXfnjZqCZ8i115Pzby9BzDssx DPM+3H7EfO1TbjbGQX/wayQIW/GLaCeeQPBKkotzXm6kXU2wRFhU2yl2K kGNZL9x8UVGCsWU3sD5POo6Od+kLfyNkLA7dvhWu/m1nzBALl4Qtd7HW+ Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="367882579" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="367882579" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 15:15:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="840001814" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="840001814" Received: from ls.sc.intel.com (HELO localhost) ([172.25.112.31]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 15:15:54 -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 , erdemaktas@google.com, Sean Christopherson , Sagi Shahar , David Matlack , Kai Huang , Zhi Wang , chen.bo@intel.com, hang.yuan@intel.com, tina.zhang@intel.com Subject: [PATCH v15 071/115] KVM: TDX: restore debug store when TD exit Date: Tue, 25 Jul 2023 15:14:22 -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 df88576d6b2a..71d0b95b80dc 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -2423,3 +2423,4 @@ 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 6e08d4ec132e..b46bd963349c 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -563,6 +563,7 @@ fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu) tdx_vcpu_enter_exit(vcpu, tdx); =20 tdx_user_return_update_cache(vcpu); + perf_restore_debug_store(); tdx_restore_host_xsave_state(vcpu); tdx->host_state_need_restore =3D true; =20 --=20 2.25.1