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 1EF0D2E11B6 for ; Fri, 13 Jun 2025 15:48:24 +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=1749829706; cv=none; b=ATvFiskNL62H4RDeEm4mAh16yCUYK68c/MuxsBpf9vqE/ibfQZDNp/p2J9nfmfNWpr6zN59HFcAvIaPwdJ6rd/L5IZoAdtqIMayHQV0B5dh4r40IHl7mhlVT4b5Fy+nlykVGgTL6ZgTM0ksMljsXP3gk2HbmfWErt43z/Pr/El4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749829706; c=relaxed/simple; bh=FojZyvLVbhO1afwcCGOtvbSFV9LqE1bZ/a0IHjoWFZQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=HjVqVfoUFMsBwEKQFJ+MKfqJvy7ha2YdTvNU1Winim9ZYZEK3VI6Q2L892KwyQu+CSKec1lkjCYN79apn4f1VNVPw9eK1ADrrKxohIsf45aDZZVOpqVe/f86LkUVfPyUTZlri5oSuTXby0k3MzEfrs5gEIsTRERqrVhm5OjFFQw= 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=ni2rhUk0; arc=none smtp.client-ip=198.175.65.15 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="ni2rhUk0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1749829705; x=1781365705; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=FojZyvLVbhO1afwcCGOtvbSFV9LqE1bZ/a0IHjoWFZQ=; b=ni2rhUk0bWZKuM5adwln+YpZ9nIDyvzbasZSU58CyrKHJlslKLQNT0Qx ESrAItbWaw2Dg1BuWAeI74D9osDlQChYXFpV3L7/V9U4wyMPa2EgS8Zpf 27VMLAf0oSauRcL2ExYUaWvTisN4psvexVOJTz1YedugvJ9mwj9vgk/Zp x69xaLXvib7uxJLz/UegPyIvPXEJXBKiYVI9ag46ESCw32ZauSVpttLem yhGDvX38svqAPL5YRhWPB6HJumvIxSybKC18YJ0nGp3WwYmZ7lX9tgbMP el1LDf69JkLy09TkdzFXqw3/2QLq7wzqiI1TyWCFT2JrwCNwNOhmo+4PL Q==; X-CSE-ConnectionGUID: EsBrfXTzTreObQHaEPAJXQ== X-CSE-MsgGUID: nz9VzIzfSai0hsShdJgYqQ== X-IronPort-AV: E=McAfee;i="6800,10657,11463"; a="55722662" X-IronPort-AV: E=Sophos;i="6.16,234,1744095600"; d="scan'208";a="55722662" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jun 2025 08:48:24 -0700 X-CSE-ConnectionGUID: 3T00fa6sRz+6KT/aqLL89Q== X-CSE-MsgGUID: pWa7o3/LQd6HxTN2cMgw8Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,234,1744095600"; d="scan'208";a="178756248" Received: from spandruv-desk1.amr.corp.intel.com (HELO [10.125.111.228]) ([10.125.111.228]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jun 2025 08:48:24 -0700 Message-ID: <71968fb3-198f-4334-95ea-30a9dfba1935@intel.com> Date: Fri, 13 Jun 2025 08:48:23 -0700 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: [RFC PATCH 07/12] perf/x86: Add YMMH in extended regs To: kan.liang@linux.intel.com, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, tglx@linutronix.de, dave.hansen@linux.intel.com, irogers@google.com, adrian.hunter@intel.com, jolsa@kernel.org, alexander.shishkin@linux.intel.com, linux-kernel@vger.kernel.org Cc: dapeng1.mi@linux.intel.com, ak@linux.intel.com, zide.chen@intel.com References: <20250613134943.3186517-1-kan.liang@linux.intel.com> <20250613134943.3186517-8-kan.liang@linux.intel.com> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; keydata= xsFNBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABzUVEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gKEludGVsIFdvcmsgQWRkcmVzcykgPGRhdmUuaGFuc2VuQGludGVs LmNvbT7CwXgEEwECACIFAlQ+9J0CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEGg1 lTBwyZKwLZUP/0dnbhDc229u2u6WtK1s1cSd9WsflGXGagkR6liJ4um3XCfYWDHvIdkHYC1t MNcVHFBwmQkawxsYvgO8kXT3SaFZe4ISfB4K4CL2qp4JO+nJdlFUbZI7cz/Td9z8nHjMcWYF IQuTsWOLs/LBMTs+ANumibtw6UkiGVD3dfHJAOPNApjVr+M0P/lVmTeP8w0uVcd2syiaU5jB aht9CYATn+ytFGWZnBEEQFnqcibIaOrmoBLu2b3fKJEd8Jp7NHDSIdrvrMjYynmc6sZKUqH2 I1qOevaa8jUg7wlLJAWGfIqnu85kkqrVOkbNbk4TPub7VOqA6qG5GCNEIv6ZY7HLYd/vAkVY E8Plzq/NwLAuOWxvGrOl7OPuwVeR4hBDfcrNb990MFPpjGgACzAZyjdmYoMu8j3/MAEW4P0z F5+EYJAOZ+z212y1pchNNauehORXgjrNKsZwxwKpPY9qb84E3O9KYpwfATsqOoQ6tTgr+1BR CCwP712H+E9U5HJ0iibN/CDZFVPL1bRerHziuwuQuvE0qWg0+0SChFe9oq0KAwEkVs6ZDMB2 P16MieEEQ6StQRlvy2YBv80L1TMl3T90Bo1UUn6ARXEpcbFE0/aORH/jEXcRteb+vuik5UGY 5TsyLYdPur3TXm7XDBdmmyQVJjnJKYK9AQxj95KlXLVO38lczsFNBFRjzmoBEACyAxbvUEhd GDGNg0JhDdezyTdN8C9BFsdxyTLnSH31NRiyp1QtuxvcqGZjb2trDVuCbIzRrgMZLVgo3upr MIOx1CXEgmn23Zhh0EpdVHM8IKx9Z7V0r+rrpRWFE8/wQZngKYVi49PGoZj50ZEifEJ5qn/H Nsp2+Y+bTUjDdgWMATg9DiFMyv8fvoqgNsNyrrZTnSgoLzdxr89FGHZCoSoAK8gfgFHuO54B lI8QOfPDG9WDPJ66HCodjTlBEr/Cwq6GruxS5i2Y33YVqxvFvDa1tUtl+iJ2SWKS9kCai2DR 3BwVONJEYSDQaven/EHMlY1q8Vln3lGPsS11vSUK3QcNJjmrgYxH5KsVsf6PNRj9mp8Z1kIG qjRx08+nnyStWC0gZH6NrYyS9rpqH3j+hA2WcI7De51L4Rv9pFwzp161mvtc6eC/GxaiUGuH BNAVP0PY0fqvIC68p3rLIAW3f97uv4ce2RSQ7LbsPsimOeCo/5vgS6YQsj83E+AipPr09Caj 0hloj+hFoqiticNpmsxdWKoOsV0PftcQvBCCYuhKbZV9s5hjt9qn8CE86A5g5KqDf83Fxqm/ vXKgHNFHE5zgXGZnrmaf6resQzbvJHO0Fb0CcIohzrpPaL3YepcLDoCCgElGMGQjdCcSQ+Ci FCRl0Bvyj1YZUql+ZkptgGjikQARAQABwsFfBBgBAgAJBQJUY85qAhsMAAoJEGg1lTBwyZKw l4IQAIKHs/9po4spZDFyfDjunimEhVHqlUt7ggR1Hsl/tkvTSze8pI1P6dGp2XW6AnH1iayn yRcoyT0ZJ+Zmm4xAH1zqKjWplzqdb/dO28qk0bPso8+1oPO8oDhLm1+tY+cOvufXkBTm+whm +AyNTjaCRt6aSMnA/QHVGSJ8grrTJCoACVNhnXg/R0g90g8iV8Q+IBZyDkG0tBThaDdw1B2l asInUTeb9EiVfL/Zjdg5VWiF9LL7iS+9hTeVdR09vThQ/DhVbCNxVk+DtyBHsjOKifrVsYep WpRGBIAu3bK8eXtyvrw1igWTNs2wazJ71+0z2jMzbclKAyRHKU9JdN6Hkkgr2nPb561yjcB8 sIq1pFXKyO+nKy6SZYxOvHxCcjk2fkw6UmPU6/j/nQlj2lfOAgNVKuDLothIxzi8pndB8Jju KktE5HJqUUMXePkAYIxEQ0mMc8Po7tuXdejgPMwgP7x65xtfEqI0RuzbUioFltsp1jUaRwQZ MTsCeQDdjpgHsj+P2ZDeEKCbma4m6Ez/YWs4+zDm1X8uZDkZcfQlD9NldbKDJEXLIjYWo1PH hYepSffIWPyvBMBTW2W5FRjJ4vLRrJSUoEfJuPQ3vW9Y73foyo/qFoURHO48AinGPZ7PC7TF vUaNOTjKedrqHkaOcqB185ahG2had0xnFsDPlx5y In-Reply-To: <20250613134943.3186517-8-kan.liang@linux.intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/13/25 06:49, kan.liang@linux.intel.com wrote: > size = FXSAVE_SIZE + XSAVE_HDR_SIZE; > > + if (x86_pmu.ext_regs_mask & BIT_ULL(X86_EXT_REGS_YMM)) > + size += XSAVE_YMM_SIZE; Sorry, but this is probably buggy too: > The value returned by ECX[1] indicates the alignment of state > component i when the compacted format of the extended region of an > XSAVE area is used (see Section 13.4.3). You can't simply stack all the sizes on top of each other. You have to align some of the components individually to a 64-byte boundary. It works for the large components because they're multiples of 64 bytes already.