Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp1229pxf; Wed, 31 Mar 2021 14:44:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzTWMeN/GfVmNHai/lwBky973nYpZ5v6M6AmpxXHm3/JF3gLNq+biu+2RGChvozMx9OBy5W X-Received: by 2002:a17:906:938f:: with SMTP id l15mr5795660ejx.15.1617227041723; Wed, 31 Mar 2021 14:44:01 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1617227041; cv=none; d=google.com; s=arc-20160816; b=nkdzpaIzQ4Zw/dq+ThUam6zraotHXDcCbJDHzhkhzHxNwIFB9DQPy9m4MqMpAqpt8C BmAxUZ6498V7T/FI3wDDBztGpK5AQUPNdkvOxepRXcYcZZICLGxW4R40EOToED39C11b XGil2qXxkOM+Jn2h1pyCaBBpSLHk8UfeWQT9rULhyqsrZES6PN5myyoySSUgNbhdn5Nk KYIyMTNophuzmep/KF2+Bw+dTddaqAz9nE7z4qXvpdq0mFv7iDys2KF37ZK83Tz5apiU Pyfdm7ael2DZ3cbOQfDC1EAAzDt/JdnncdiUOz5Vf8BWaowp7QOkv8SfpLbSSBKuUHJs qu/Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:subject:message-id:date:from:reply-to :in-reply-to:references:mime-version:dkim-signature; bh=Dm0wbOpFh785zQvfbpu+Gc+GoqlFqm/RgMC8mqoD454=; b=WOsp2zYSlWm0QkV0oFPJuMY7vZXjpBq5xgLylt+qraJy6MkYqmUNlPhUSwW7oDMKjI nDclXtQww725YJcK/GfDHz2x86dU48M4lN3Qxi/1A4D5LJhUU6uWhAaDIW2h3v697eM+ iYrGdbg1saT/HcgrHJrl9tWoa0Ft+1SjHhiAP58Rbzz9fIc6YopYR34BGuFLxo/muuD7 6f886RS9T+mluSR0VOVxFaNfmJdednm8IXktLJwVtP3TtjnUc42Zs/xf9d8fiuT9ksEq PHCtt4ArgV/byrcQfZMRt2Krrae8fh1+S85C/dnfsWb0N7NhzCHX2jxzwS6JP0T6YrEc xHFg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ocallahan-org.20150623.gappssmtp.com header.s=20150623 header.b=WErKMdfw; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id s13si3141949edc.150.2021.03.31.14.43.34; Wed, 31 Mar 2021 14:44:01 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@ocallahan-org.20150623.gappssmtp.com header.s=20150623 header.b=WErKMdfw; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232271AbhCaVmh (ORCPT + 99 others); Wed, 31 Mar 2021 17:42:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231180AbhCaVmW (ORCPT ); Wed, 31 Mar 2021 17:42:22 -0400 Received: from mail-ua1-x934.google.com (mail-ua1-x934.google.com [IPv6:2607:f8b0:4864:20::934]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED9CCC061574; Wed, 31 Mar 2021 14:42:21 -0700 (PDT) Received: by mail-ua1-x934.google.com with SMTP id h34so6607952uah.5; Wed, 31 Mar 2021 14:42:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ocallahan-org.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:reply-to:from:date:message-id :subject:to:cc; bh=Dm0wbOpFh785zQvfbpu+Gc+GoqlFqm/RgMC8mqoD454=; b=WErKMdfwEEzxHs7ggw/O2PQZpwoXB2Iotis7qJYEo0LRMCZXsa+qYkwiSOCFmPYHSa Liu6m1KZBi2RPMTFSN6sNzBiRYruN286prnZ5ftunCiK7tKu5bIHt7mBwhOZ+H7HTnQF AKw0Au9LcsoOAs4NgfVmrL8a+W37Ub2+pqsY//5W3xDYPFdqHmnlsRvQamuZLFdncL2z YjmXe8tXjicjVLSxR0u/VH82Ks94K1sTf8f16ZZnvDYLVWE73Fx/MusoAtKEfKGRqc+q 4w7yY9ULAMo/gfWNdh0RakFn36LylnUnn4LIU8KJ+f37gOVtSFeTCeaY3Zj+mBqxwgFz qLMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc; bh=Dm0wbOpFh785zQvfbpu+Gc+GoqlFqm/RgMC8mqoD454=; b=eYWm2KA1pt3qNY1kOOWNzB39qhncuSHTmRy0FvClfgahfshFggpoIw1REbKqCEzcLv bHxOEh9DqfVMEKG+YnOm9FeIZrSibPUOmDiBsSy5gfExl8emeLQS6fuDWKwJdMHsdrDu mQjYgmijXSJTDuCbX1JGN2zRbDXb29DPFT+MtAJAnkGszQswGEIiNycP27Abiavmz/AR e1tOGJa8JFezqRkPxxZZic48Qt6dxQrm5zSpIcgPcIljSfrgSGVU4glUyKVt+cnRWJYU 9DyAsILY1ZeRQ+RHUIMpZMUMiXHvXsy0pgm8p+cTSXs3H2tPUnIc3r+rFLX3v+mGBDLN rUDA== X-Gm-Message-State: AOAM531+Yy4IDFtbS/mM6V1qp7wEjN5t+4wRZTA0c4kAOvGhh8io/h4U 6K0QkkLJqiY8WJXZ4HawMGlQjkg20ZGl9WnG+OY= X-Received: by 2002:ab0:4042:: with SMTP id h60mr3070914uad.133.1617226940932; Wed, 31 Mar 2021 14:42:20 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Reply-To: robert@ocallahan.org From: "Robert O'Callahan" Date: Thu, 1 Apr 2021 10:42:09 +1300 Message-ID: Subject: Re: Candidate Linux ABI for Intel AMX and hypothetical new related features To: Andy Lutomirski Cc: Len Brown , David Laight , Dave Hansen , Andy Lutomirski , Greg KH , "Bae, Chang Seok" , X86 ML , LKML , libc-alpha , Florian Weimer , Rich Felker , Kyle Huey , Keno Fischer , Linux API Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For the record, the benefits of dynamic XCR0 for rr recording portability still apply. I guess it'd be useful for CRIU too. We would also benefit from anything that incentivizes increased support for CPUID faulting. Rob -- Su ot deraeppa sah dna Rehtaf eht htiw saw hcihw, efil lanrete eht uoy ot mialcorp ew dna, ti ot yfitset dna ti nees evah ew; deraeppa efil eht. Efil fo Drow eht gninrecnoc mialcorp ew siht - dehcuot evah sdnah ruo dna ta dekool evah ew hcihw, seye ruo htiw nees evah ew hcihw, draeh evah ew hcihw, gninnigeb eht morf saw hcihw taht.