From nobody Mon Sep 15 11:37:36 2025 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 26097C61DB3 for ; Thu, 12 Jan 2023 16:39:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240233AbjALQjw (ORCPT ); Thu, 12 Jan 2023 11:39:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232555AbjALQhY (ORCPT ); Thu, 12 Jan 2023 11:37:24 -0500 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 846A510041; Thu, 12 Jan 2023 08:33:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1673541224; x=1705077224; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=6Cs+vnL5xeV//APM1/4rRZmxU4rCJeFcpisPPdJiZQ8=; b=RjXgPgH0p7HKKxeXKdt4X0xzg0BcKxcbhhgfofeyGI/Thb603AiiosTt cG9fpbJ3oukUWC36yOsw2AQBYYJnpU87t/PYNCK3d5aYMmvbSXU5gNrOG WRisLf2AaomV1CdPN2Fyo2baoznjzzZt/F8hcHrmb7YrEnUbr9ZC7r91X +ZXgGvxm9Gh47mpeDf9f7R3+ZL04F8kR80VGCcK+AiCHSt8ayv54CKgbJ XXyP6yEwqOp7HnGg8dvNOpT8JdLgrRzDHypKI7iMBzGm3utz+mLpITh0Z JUi8g2GVVVeXclu5IROD4EVilWXiEuAzY4KVDzvkaJ8j/9aluWrwoc0ka g==; X-IronPort-AV: E=McAfee;i="6500,9779,10588"; a="386089721" X-IronPort-AV: E=Sophos;i="5.97,211,1669104000"; d="scan'208";a="386089721" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jan 2023 08:33:36 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10588"; a="726372557" X-IronPort-AV: E=Sophos;i="5.97,211,1669104000"; d="scan'208";a="726372557" 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; 12 Jan 2023 08:33:36 -0800 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 Subject: [PATCH v11 092/113] KVM: TDX: Handle TDX PV CPUID hypercall Date: Thu, 12 Jan 2023 08:32:40 -0800 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 Wire up TDX PV CPUID hypercall to the KVM backend function. Signed-off-by: Isaku Yamahata --- arch/x86/kvm/vmx/tdx.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 89693405892d..6419cb741996 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -923,12 +923,34 @@ static int tdx_vp_vmcall_to_user(struct kvm_vcpu *vcp= u) return 0; } =20 +static int tdx_emulate_cpuid(struct kvm_vcpu *vcpu) +{ + u32 eax, ebx, ecx, edx; + + /* EAX and ECX for cpuid is stored in R12 and R13. */ + eax =3D tdvmcall_a0_read(vcpu); + ecx =3D tdvmcall_a1_read(vcpu); + + kvm_cpuid(vcpu, &eax, &ebx, &ecx, &edx, false); + + tdvmcall_a0_write(vcpu, eax); + tdvmcall_a1_write(vcpu, ebx); + tdvmcall_a2_write(vcpu, ecx); + tdvmcall_a3_write(vcpu, edx); + + tdvmcall_set_return_code(vcpu, TDG_VP_VMCALL_SUCCESS); + + return 1; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { if (tdvmcall_exit_type(vcpu)) return tdx_emulate_vmcall(vcpu); =20 switch (tdvmcall_leaf(vcpu)) { + case EXIT_REASON_CPUID: + return tdx_emulate_cpuid(vcpu); default: break; } --=20 2.25.1