From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7523243933D; Fri, 14 Aug 2026 08:10:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786695057; cv=none; b=oyUXpnsd1yf+JqW1l2/9ueWSUbUrNcbcQvTxBGTBPStFJJXyvvxXfmVpSqUeRgDSw1mlbfmxDgiHZmZ73Lsx6cXmB4OJhsSfoehvYemEH6dVT9c3bkfzjohDOOPbVykC9o/OXyWl3lfj7nwgDBVa8+Rc2zYe/6yFjGWoLbKKqcY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786695057; c=relaxed/simple; bh=TCo4oSBCLYQ9tZ2Jg7BbfO8LlZ51oESg/QABBLpe7q4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Lg/AwaiL1BXL3jegur2tq4AR2hAlllJ6iGMgMhnuehAnTEwqp5OGMoqDhKJvqA90UMeFujub2GrISUwo92hm84VYjRIy3ZiWVHlTPINa89oKarmKqP9wydqGvxIDx9pz9g+5Cm8CulMz3UcnS1AtbQiFuPDSXvktcCqAXKmSsXo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=SDHbPUSO; arc=none smtp.client-ip=192.198.163.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="SDHbPUSO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1786695055; x=1818231055; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=TCo4oSBCLYQ9tZ2Jg7BbfO8LlZ51oESg/QABBLpe7q4=; b=SDHbPUSO9xWzkt6TfejIxuuIPdrvHsnphH+El4OqTX/XQUUDe0WJK26p 15SQlfuyteh8/lnlg2Q97GjNzGKgldN4cbDI+YrT+I75SzgmQFG6M0U6u /p+tv6yw269NztOkOdN30wL1ByOptUes3DTr3L3Ouwwz0sl7o4jxpDhPl HQQpCawI045P1cmqN/AJ56IDtjVW7EH5cfpttJMADw9ROWxtQnYBGgtIl XvBTTO+dAGSqZYtFak2de3cOdejibvc/TZIm2mlXZEuXT/gUyb7Eg/+Np crJbcPgi9KMxks5pKyMk4CkmKeigE029XoN8i9tLxpPOOvZjVX3x6ymVC Q==; X-CSE-ConnectionGUID: eDfI+JJXSPu/jiQ/70mb4A== X-CSE-MsgGUID: WmOjo6ZaTYe1GYK3JqTHuQ== X-IronPort-AV: E=McAfee;i="6800,10657,11874"; a="87296788" X-IronPort-AV: E=Sophos;i="6.25,222,1779174000"; d="scan'208";a="87296788" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Aug 2026 01:10:53 -0700 X-CSE-ConnectionGUID: bmW3pYeoTT6o7eRHfs86Jg== X-CSE-MsgGUID: TO7aI/dkQZ6jLYNEMqqdLg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,222,1779174000"; d="scan'208";a="263719606" Received: from unknown (HELO [10.238.208.98]) ([10.238.208.98]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Aug 2026 01:10:48 -0700 Message-ID: <693b060b-accf-462b-a069-245e05ff6283@intel.com> Date: Fri, 14 Aug 2026 16:10:44 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v14 14/22] KVM: selftests: Expose function to allocate vCPU stack To: Lisa Wang , Andrew Jones , Ackerley Tng , Binbin Wu , Chao Gao , Dave Hansen , Erdem Aktas , Kiryl Shutsemau , linux-kselftest@vger.kernel.org, Paolo Bonzini , "Pratik R. Sampat" , Reinette Chatre , Rick Edgecombe , Roger Wang , Ryan Afranji , Sagi Shahar , Sean Christopherson , Shuah Khan , Oliver Upton Cc: Jeremiah McReynolds , kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, x86@kernel.org References: <20260722-tdx-selftests-v14-0-15ad654a50db@google.com> <20260722-tdx-selftests-v14-14-15ad654a50db@google.com> Content-Language: en-US From: Xiaoyao Li In-Reply-To: <20260722-tdx-selftests-v14-14-15ad654a50db@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/23/2026 7:13 AM, Lisa Wang wrote: > From: Sagi Shahar > > Introduce kvm_allocate_vcpu_stack() to allocate a vCPU's stack > in preparation for TDX to allocate a vCPU's stack and initialize > its stack pointer. > > TDX VMs' registers are protected state and cannot be initialized > using the KVM_SET_REGS ioctl() that is used for normal VMs. A TDX > vCPU's stack address will be a property of the TDX specific boot code > that initializes the vCPUs' stack pointers at boot. > > Reviewed-by: Binbin Wu > Signed-off-by: Sagi Shahar > Reviewed-by: Ira Weiny > Signed-off-by: Lisa Wang Reviewed-by: Xiaoyao Li