From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D162D21FF2E; Sun, 16 Nov 2025 17:25:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763313923; cv=none; b=WSmWGRsOV0+tL4pbbGTukS2r+wectwG/1lqtIATDn14D9utenZUU+Osmzcx/Y/GFLt8URQtzQYka6dBuAZ484IW6tdz2rhBHtS8eODyYxeDskVgKrKP20D6LHd4Z9tdHTpmRxVjMzeD2iRtHzLybNDMMSWBj8gV3hnlT6TY1+yQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763313923; c=relaxed/simple; bh=PnQmzRvxYj3xJBIpIHJUKlkpSpQzmHG2z4omra3y988=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dKn2OoX5/sF8y6Reg0Jf6oI8mKPhbHxZiOBt3c17ytXgCzCNQVFb/+OnZqYVsZg9TH0brUdYbB9PiMzGzKVm84cRvUIvjP1ZXwPmcjVIWfgOt/kf3b9v7h8uZVZeqahacKgOiekWisj2p2P68JZnrwAh2mftQYXSv6iXZpzILw0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hSysxEte; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hSysxEte" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8D92C4CEF1; Sun, 16 Nov 2025 17:25:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763313923; bh=PnQmzRvxYj3xJBIpIHJUKlkpSpQzmHG2z4omra3y988=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hSysxEte094y1ePz44qMmh8youDVXxpi8kQBZj/KjrhDUlj7q6RA64kBQPlvr4LJK Wf71HhtuIJfu/XRtVtGAiujx5mHtlcUQ0JxLLko+kKlocKZHAIQfiBfJLec0LLC7F7 LDAxNcFb4kD55M++D5XSI8KZeDS7XIRJuXEraXXqO7bbSFHqcgSE12b1V6SQvv4O+r lsLARY34VB3V0CdCA+YNW2ConRyTmCz5Sn7Ehdq+M+eX91JQJAxRFeMzcgdHs34Ldr fh1qWjIPRvKceg6MxCMeTH+jeERISQ6eWQLPQKIP1+f+etevLO6Bb6H9aCnk3pjm3z MPaygpLiC0Ctg== Date: Sun, 16 Nov 2025 09:25:21 -0800 From: Drew Fustini To: Babu Moger Cc: corbet@lwn.net, tony.luck@intel.com, reinette.chatre@intel.com, Dave.Martin@arm.com, james.morse@arm.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, kas@kernel.org, rick.p.edgecombe@intel.com, akpm@linux-foundation.org, paulmck@kernel.org, frederic@kernel.org, pmladek@suse.com, rostedt@goodmis.org, kees@kernel.org, arnd@arndb.de, fvdl@google.com, seanjc@google.com, thomas.lendacky@amd.com, pawan.kumar.gupta@linux.intel.com, perry.yuan@amd.com, manali.shukla@amd.com, sohil.mehta@intel.com, xin@zytor.com, Neeraj.Upadhyay@amd.com, peterz@infradead.org, tiala@microsoft.com, mario.limonciello@amd.com, dapeng1.mi@linux.intel.com, michael.roth@amd.com, chang.seok.bae@intel.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, kvm@vger.kernel.org, peternewman@google.com, eranian@google.com, gautham.shenoy@amd.com Subject: Re: [PATCH v18 00/33] x86,fs/resctrl: Support AMD Assignable Bandwidth Monitoring Counters (ABMC) Message-ID: References: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Fri, Sep 05, 2025 at 04:33:59PM -0500, Babu Moger wrote: > > This series adds the support for Assignable Bandwidth Monitoring Counters > (ABMC). It is also called QoS RMID Pinning feature. > > Series is written such that it is easier to support other assignable > features supported from different vendors. Is there a way to find out which EPYC parts support ABMC? I'm rebasing the RISC-V resctrl support on 6.18 and I noticed there are a lot of changes to how events work. I've been reading the ABMC code but I would like to get a better feel for how it works. I found an EPYC 9124P on Cherry Servers which I was able to experiment with using resctrl on x86. It has the following in cpuinfo: cat_l3 cdp_l3 cqm cqm_llc cqm_mbm_local cqm_mbm_total cqm_occup_llc mba It also has SMBA and BMEC based on the contents of /sys/fs/resctrl. Ideally, I'd like to find a bare metal EPYC server that has ABMC, too. Thanks, Drew