From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 8DAF732ED26; Fri, 31 Oct 2025 09:08:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761901706; cv=none; b=YzbkOzr2npg4/5JLdsI+UjUm5bzrDJ7rPlIIIHrmUF1Df1AcqqxhZbLEV0QJHI1iZnw78Ws/EQ48D8RYghYAhAww23KuslBJfDbnuPn667YbhCZYVJ7c/AgIs5jOaQ4AkEQFTWl8mb1EXtYJlqG5usaIFo6l9VY5WTU/MRNCiKs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761901706; c=relaxed/simple; bh=8N9WDGemUWQsRelXH+GyTq3qC+LNB5rRhJXjTRawBT4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=pyUFYAkc0LWWk3Es+ivLTbslAwDjDcVX4/lwzXRI3kd1sAzZneYJL/2mcrPWaF10eFofjJNHNgu0Q1mrq8Q3M195UTZGGiPCo5SdQOpaWClI7X/bMRLK7ueI/YA+Qbz6Irl4fbzy8l10zDp0GW0eg+wcNGbOE6aDudBvo7HgkZg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=ToT3puQr; arc=none smtp.client-ip=198.175.65.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="ToT3puQr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1761901705; x=1793437705; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=8N9WDGemUWQsRelXH+GyTq3qC+LNB5rRhJXjTRawBT4=; b=ToT3puQr95h3ixsM5l1c4mmBdAIOQ56YI9hVdoqC0x616bjmSecem0I/ z9Zps0tKbaaMELMjDJIQOqkSKxRNaEQDa4tRaXE3vVyqZpW3gCBSJPkGL FALBl8AQd9Bq0oog0ob+BJuPDz1wNhEtUitCwU6dy1+KwYQhMpXatn8gD 5CgM2/Fr9Zogxb1S4bdqHplvWYF+2ISJWPYv+YF/KaeRNt6FdmQ/fKi+Q fQf/inB9cL+J3eO50rQZZdkP/9+Yenlvcp5q1FcJJrfuH422+b+Zgrdcz 9p9SsPBwz4yI03N+3SjJUUaApBwRMHitcYpoC3mkcBVABenCsQ0dbjcSw g==; X-CSE-ConnectionGUID: 3e0yBdwrQ7yXzN07X3S0qA== X-CSE-MsgGUID: 8aiBk38kS9+3/LooniKDYg== X-IronPort-AV: E=McAfee;i="6800,10657,11598"; a="67713279" X-IronPort-AV: E=Sophos;i="6.19,269,1754982000"; d="scan'208";a="67713279" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Oct 2025 02:08:25 -0700 X-CSE-ConnectionGUID: GjHDbGLnSWakhDM9/CBrlg== X-CSE-MsgGUID: Gbbob1bvT8C2WhgnaRVktg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,269,1754982000"; d="scan'208";a="186123013" Received: from binbinwu-mobl.ccr.corp.intel.com (HELO [10.124.240.28]) ([10.124.240.28]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Oct 2025 02:08:16 -0700 Message-ID: Date: Fri, 31 Oct 2025 17:08:13 +0800 Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 21/28] KVM: TDX: Add macro to retry SEAMCALLs when forcing vCPUs out of guest To: Sean Christopherson Cc: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Madhavan Srinivasan , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Paolo Bonzini , "Kirill A. Shutemov" , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, Ira Weiny , Kai Huang , Michael Roth , Yan Zhao , Vishal Annapurve , Rick Edgecombe , Ackerley Tng References: <20251030200951.3402865-1-seanjc@google.com> <20251030200951.3402865-22-seanjc@google.com> Content-Language: en-US From: Binbin Wu In-Reply-To: <20251030200951.3402865-22-seanjc@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/31/2025 4:09 AM, Sean Christopherson wrote: > Add a macro to handle kicking vCPUs out of the guest and retrying > SEAMCALLs on -EBUSY instead of providing small helpers to be used by each > SEAMCALL. Wrapping the SEAMCALLs in a macro makes it a little harder to > tease out which SEAMCALL is being made, but significantly reduces the > amount of copy+paste code and makes it all but impossible to leave an > elevated wait_for_sept_zap. > > Signed-off-by: Sean Christopherson Reviewed-by: Binbin Wu