From nobody Mon Feb 9 07:26:56 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 D64CFC001DF for ; Tue, 25 Jul 2023 22:24:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232838AbjGYWYu (ORCPT ); Tue, 25 Jul 2023 18:24:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39262 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232842AbjGYWXD (ORCPT ); Tue, 25 Jul 2023 18:23:03 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AB5A5249; Tue, 25 Jul 2023 15:18:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690323494; x=1721859494; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0201nZOQNDeXU1m+PIlO4jk2v5Jd3RpUfZElkXE2XPI=; b=eC1rgBXWX3B0CH1TbmzoWaRoZdZDDeF36mQC69KwnAIponCJySHC7OH0 E41Sc9kledoJGT/KOz9HOOBjFcgkHkzpiuSLrIeA2GFaisz4KwhwXcmzp v5zGUhRMkiiHRLAlxfgNGacFE0GPxHP9Y2BUDcOlDoSvnY2sVi+B6+Fp+ KY+QOlpdtCRZ4RXoXV/JZiZkqHnQ6Zq3lU6eMx6Fy6WIXbbem9AO1Pooc OWfE6wuaqjO7sEx8WcmpcJsWPpSgDwUhu+mH/610hN1nlOjni01ryO7Qd uAd+TFHhEVsYmXWKAajBmWJY3OdhcigjHeBILx+SISKObhna7hAdBWoxz w==; X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="367882690" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="367882690" 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 15:16:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="840001890" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="840001890" 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 15:16:02 -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 090/115] KVM: TDX: handle KVM hypercall with TDG.VP.VMCALL Date: Tue, 25 Jul 2023 15:14:41 -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 The TDX Guest-Host communication interface (GHCI) specification defines the ABI for the guest TD to issue hypercall. It reserves vendor specific arguments for VMM specific use. Use it as KVM hypercall and handle it. Signed-off-by: Isaku Yamahata --- arch/x86/kvm/vmx/tdx.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 0a1ccd16d17f..19500a05f7b5 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -889,8 +889,39 @@ static int tdx_handle_triple_fault(struct kvm_vcpu *vc= pu) return 0; } =20 +static int tdx_emulate_vmcall(struct kvm_vcpu *vcpu) +{ + unsigned long nr, a0, a1, a2, a3, ret; + + /* + * ABI for KVM tdvmcall argument: + * In Guest-Hypervisor Communication Interface(GHCI) specification, + * Non-zero leaf number (R10 !=3D 0) is defined to indicate + * vendor-specific. KVM uses this for KVM hypercall. NOTE: KVM + * hypercall number starts from one. Zero isn't used for KVM hypercall + * number. + * + * R10: KVM hypercall number + * arguments: R11, R12, R13, R14. + */ + nr =3D kvm_r10_read(vcpu); + a0 =3D kvm_r11_read(vcpu); + a1 =3D kvm_r12_read(vcpu); + a2 =3D kvm_r13_read(vcpu); + a3 =3D kvm_r14_read(vcpu); + + ret =3D __kvm_emulate_hypercall(vcpu, nr, a0, a1, a2, a3, true); + + tdvmcall_set_return_code(vcpu, ret); + + return 1; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { + if (tdvmcall_exit_type(vcpu)) + return tdx_emulate_vmcall(vcpu); + switch (tdvmcall_leaf(vcpu)) { default: break; --=20 2.25.1