From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f46.google.com (mail-oa1-f46.google.com [209.85.160.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C14517E8FF for ; Tue, 28 May 2024 05:33:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.46 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716874415; cv=none; b=mjxF9jKeMaUe/DUxesYaizFwMvboASo4/41xbFVyDIpdLX0fQRo5E+i0BOzCi3JTaKCwGVCMRe9CsqSeshcJkXKyGb5cHKmTMPNo0slIgyzIF2hw99WLeQYAKUPvrHwCX4UK6K2Rzck1txWanFFs4mn5KKs/o5y01AREbvbkwbw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716874415; c=relaxed/simple; bh=8LC1IXOriw4pChGUu6KrCD/lFtUczRYV7fhf7+E9wUA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WnCzWYYl2BqymRKA10uJPVURYZxSsQE8NzeIPJrC8RuPUSLoB1KtQE21tHdbb+z+YsF98VqYfrCKUTmRcYgrOkiPYem4MQVVRNObNrOkGe9WDhwKSWkSUixrCNrrmXLvTQ3JML+jOccg16nXtP5FVMsiPQuIaKJLwR4QLLj6xrk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.160.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-oa1-f46.google.com with SMTP id 586e51a60fabf-24ca079af98so237201fac.3 for ; Mon, 27 May 2024 22:33:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716874413; x=1717479213; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=ptjC09kdGjdpXiVrATn7mphaV9X4ACIvPxTCurbJjBs=; b=qGOSGytglDZqjMWRAr423CU7lRkZjNke6zRLzC/QUFb3nHgVyKcMR6dnlkkheWQoli 86TkOefUXtm4wt7uZ148fodmq2Nb8M0mHhDhclfz+wQBOYihb4jfdJ2i0ww53BFaOkaL bRRez/ljL8YHwfdWrUPpHZA6KApWRzdw4gcssGbNgsDh2Ni0ZhHVtqf9a9A/DnX5l8e7 t98M4jr+cRe+4G48pui+/pYwgWLx/zKQbWeOUntMZwoGe30Met9bKu2uspq6v+f+q3fC vAdrpHbqC0OglMwWfBU5J8MpUz+R7Wf8WIs1yXoEG3MslpHrjkjn+eFxK4ptm5CKrJF3 YQrA== X-Forwarded-Encrypted: i=1; AJvYcCWUPsjSaVgSzYVNXun5Zt7CRdXBUmYaqJj6v0tfJnm1VwF4HjAFLsRq+fYYQ9bs46t2vrnn/U8rvKEADlwRxbRjGcZO1u2an+Hq9Q== X-Gm-Message-State: AOJu0YxDIjt9DKV41TA2536S6ihSMAXwcjPS+nsunZwGfBRuIOsb4BS6 1z90nUDVc74yYN1zBeSpz+Je7TnOaootrUzGLSsifyWjJVGoQlTO X-Google-Smtp-Source: AGHT+IGM6gvEo9DzXV02LAfnEdgOeXVU9tLNw5T+R2ZMb83bodzfFygmaQpQMaamwlG42uS+oTA7Xg== X-Received: by 2002:a05:6870:4722:b0:24e:4fef:61df with SMTP id 586e51a60fabf-24e4fef737fmr9044548fac.54.1716874413334; Mon, 27 May 2024 22:33:33 -0700 (PDT) Received: from liuwe-devbox-debian-v2 ([20.69.120.36]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-701908d14c2sm1791616b3a.152.2024.05.27.22.33.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 May 2024 22:33:32 -0700 (PDT) Date: Tue, 28 May 2024 05:33:31 +0000 From: Wei Liu To: "Kirill A. Shutemov" Cc: Sean Christopherson , Paolo Bonzini , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Josh Poimboeuf , Peter Zijlstra , linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org Subject: Re: [PATCH 05/20] x86/tdx: Convert MSR read handling to use new TDVMCALL_1() Message-ID: References: <20240517141938.4177174-1-kirill.shutemov@linux.intel.com> <20240517141938.4177174-6-kirill.shutemov@linux.intel.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240517141938.4177174-6-kirill.shutemov@linux.intel.com> On Fri, May 17, 2024 at 05:19:23PM +0300, Kirill A. Shutemov wrote: > Use newly introduced TDVMCALL_1() instead of __tdx_hypercall() to handle > MSR read emulation. > > It cuts code bloat substantially: > > Function old new delta > tdx_handle_virt_exception 2052 1947 -105 > > Signed-off-by: Kirill A. Shutemov > --- > arch/x86/coco/tdx/tdx.c | 15 +++++++-------- > arch/x86/hyperv/ivm.c | 10 ++-------- Acked-by: Wei Liu