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Thu, 27 Mar 2025 05:36:10 -0700 (PDT) Date: Thu, 27 Mar 2025 08:36:07 -0400 From: Gregory Price To: Yuquan Wang Cc: Jonathan Cameron , lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org, linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [LSF/MM] CXL Boot to Bash - Section 0: ACPI and Linux Resources Message-ID: References: <20250313165539.000001f4@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@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 Thu, Mar 27, 2025 at 05:34:54PM +0800, Yuquan Wang wrote: > > In the future, srat.c would add one seperate NUMA node for each > Generic Port in SRAT. > > System firmware should know the performance characteristics between > CPU/GI to the GP, and the static HMAT should include this coordinate. > > Is my understanding right? > > HMAT is static configuration data. A GI/GP might not have its performance data known until the device is added. In this case, the HMAT may only contain generic (inaccurate) information - or more likely just nothing. It's up to the platform vendor. ~Gregory