From mboxrd@z Thu Jan 1 00:00:00 1970 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 41E6AC7EE45 for ; Mon, 29 May 2023 04:35:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232663AbjE2EfJ (ORCPT ); Mon, 29 May 2023 00:35:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48920 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232179AbjE2E3B (ORCPT ); Mon, 29 May 2023 00:29:01 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44F5E199C; Sun, 28 May 2023 21:25:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685334325; x=1716870325; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=58NDj2goq9yqIbEbRdLYrs8oCByn7UZBJiVRhHhY/2E=; b=gFiVRWHxqd8nLUF7+8bnGpdhgr9S6JyIu8crzK0yf0AhO6bRmjFIULDX FlLktP+xxwuvW2TBN5XsTDI61bijQrCPSD83JolnbNeRWmia0bI9QmFwW qkpqsiJElwwd3yLpPC4eSO+bcUeCObzQOwPLcnIIFLFLkBVTyh/h2TPeE /l1KA6yuMb//r5n3NjucfRGurVn0NYuvS9pXsFACMrfpQktcf3S8/EOAT HvJA6JJdE+GtPmSonytQ9geDpTlLaxRkUri5OBw7XQMWv9p+5em2xXHbR +JUfhl0/8DnfPF41Iutn7U+RRXRhTGuCYwqSxQwSzkmVPWb3+6KKWWUA6 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10724"; a="356993523" X-IronPort-AV: E=Sophos;i="6.00,200,1681196400"; d="scan'208";a="356993523" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2023 21:21:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10724"; a="830223578" X-IronPort-AV: E=Sophos;i="6.00,200,1681196400"; d="scan'208";a="830223578" Received: from ls.sc.intel.com (HELO localhost) ([172.25.112.31]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2023 21:21:51 -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 Subject: [PATCH v14 105/113] KVM: TDX: Add methods to ignore accesses to TSC Date: Sun, 28 May 2023 21:20:27 -0700 Message-Id: <51d07cabb3ff9c386b78273b0774d8acfc37d378.1685333728.git.isaku.yamahata@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Isaku Yamahata TDX protects TDX guest TSC state from VMM. Implement access methods to ignore guest TSC. Signed-off-by: Isaku Yamahata --- arch/x86/kvm/vmx/main.c | 44 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 40 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c index da963f305170..166bf274e597 100644 --- a/arch/x86/kvm/vmx/main.c +++ b/arch/x86/kvm/vmx/main.c @@ -827,6 +827,42 @@ static u8 vt_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) return vmx_get_mt_mask(vcpu, gfn, is_mmio); } +static u64 vt_get_l2_tsc_offset(struct kvm_vcpu *vcpu) +{ + /* TDX doesn't support L2 guest at the moment. */ + if (KVM_BUG_ON(is_td_vcpu(vcpu), vcpu->kvm)) + return 0; + + return vmx_get_l2_tsc_offset(vcpu); +} + +static u64 vt_get_l2_tsc_multiplier(struct kvm_vcpu *vcpu) +{ + /* TDX doesn't support L2 guest at the moment. */ + if (KVM_BUG_ON(is_td_vcpu(vcpu), vcpu->kvm)) + return 0; + + return vmx_get_l2_tsc_multiplier(vcpu); +} + +static void vt_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) +{ + /* In TDX, tsc offset can't be changed. */ + if (is_td_vcpu(vcpu)) + return; + + vmx_write_tsc_offset(vcpu, offset); +} + +static void vt_write_tsc_multiplier(struct kvm_vcpu *vcpu, u64 multiplier) +{ + /* In TDX, tsc multiplier can't be changed. */ + if (is_td_vcpu(vcpu)) + return; + + vmx_write_tsc_multiplier(vcpu, multiplier); +} + static void vt_update_cpu_dirty_logging(struct kvm_vcpu *vcpu) { if (KVM_BUG_ON(is_td_vcpu(vcpu), vcpu->kvm)) @@ -985,10 +1021,10 @@ struct kvm_x86_ops vt_x86_ops __initdata = { .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, - .get_l2_tsc_offset = vmx_get_l2_tsc_offset, - .get_l2_tsc_multiplier = vmx_get_l2_tsc_multiplier, - .write_tsc_offset = vmx_write_tsc_offset, - .write_tsc_multiplier = vmx_write_tsc_multiplier, + .get_l2_tsc_offset = vt_get_l2_tsc_offset, + .get_l2_tsc_multiplier = vt_get_l2_tsc_multiplier, + .write_tsc_offset = vt_write_tsc_offset, + .write_tsc_multiplier = vt_write_tsc_multiplier, .load_mmu_pgd = vt_load_mmu_pgd, -- 2.25.1