From patchwork Fri May 24 10:05:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13673005 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (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 2F2DB85631 for ; Fri, 24 May 2024 10:05:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716545115; cv=none; b=sQRmfTVAPgXGe5gAO5vP+J8Mmpks3K0AXGEbueEe+HhDmsA9p9+N/I4yI/Qa1BEZ3kQLohjT9r3ggHJDmaz0ubKpaWwI58btMTqMb7Rm4r9qa7V+6+MjUbC4fE9Dpm6jxNhFNthD/fNA2FkaySyzHg01NUzplwJal7H1na8yRxA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716545115; c=relaxed/simple; bh=l3HxCmjUTCVgjWGmkd1wWCMrQZ5mSYF1OszHNvGSflA=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=IoTVJ/z6PJsot22QBmLXImsWXW7EY1SHDEsOWkhjQqnVrKs1ztPOnZdjKYRqosxxKZgW5DlceREXuq80ZHb2VKHwjs7Gcagd/NoKlmsWjvt0XLBaCqRi9cnfS8kaEqEPHeUJZ0sZn8wdAPC51njE372ljUuszC21/b74VtMnP5o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Vm0tW5h79z6JBVy; Fri, 24 May 2024 18:01:23 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id 6A274140B54; Fri, 24 May 2024 18:05:08 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 24 May 2024 11:05:07 +0100 From: Jonathan Cameron To: , Markus Armbruster , , , , CC: Dave Jiang , Huang Ying , Paolo Bonzini , , , , , Michael Roth , Ani Sinha Subject: [PATCH v2 qemu 0/6] acpi: NUMA nodes for CXL HB as GP + complex NUMA test. Date: Fri, 24 May 2024 11:05:01 +0100 Message-ID: <20240524100507.32106-1-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml500006.china.huawei.com (7.191.161.198) To lhrpeml500005.china.huawei.com (7.191.163.240) v2: Improve (mostly add detail) the qmp documentatation (thanks Markus!) ACPI 6.5 introduced Generic Port Affinity Structures to close a system description gap that was a problem for CXL memory systems. It defines an new SRAT Affinity structure (and hence allows creation of an ACPI Proximity Node which can only be defined via an SRAT structure) for the boundary between a discoverable fabric and a non discoverable system interconnects etc. The HMAT data on latency and bandwidth is combined with discoverable information from the CXL bus (link speeds, lane counts) and CXL devices (switch port to port characteristics and USP to memory, via CDAT tables read from the device). QEMU has supported the rest of the elements of this chain for a while but now the kernel has caught up and we need the missing element of Generic Ports (this code has been used extensively in testing and debugging that kernel support, some resulting fixes currently under review). Generic Port Affinity Structures are very similar to the recently added Generic Initiator Affinity Structures (GI) so this series factors out and reuses much of that infrastructure for reuse There are subtle differences (beyond the obvious structure ID change). - The ACPI spec example (and linux kernel support) has a Generic Port not as associated with the CXL root port, but rather with the CXL Host bridge. As a result, an ACPI handle is used (rather than the PCI SBDF option for GIs). In QEMU the easiest way to get to this is to target the root bridge PCI Bus, and conveniently the root bridge bus number is used for the UID allowing us to construct an appropriate entry. A key addition of this series is a complex NUMA topology example that stretches the QEMU emulation code for GI, GP and nodes with just CPUS, just memory, just hot pluggable memory, mixture of memory and CPUs. A similar test showed up a few NUMA related bugs with fixes applied for 9.0 (note that one of these needs linux booted to identify that it rejects the HMAT table and this test is a regression test for the table generation only). https://lore.kernel.org/qemu-devel/2eb6672cfdaea7dacd8e9bb0523887f13b9f85ce.1710282274.git.mst@redhat.com/ https://lore.kernel.org/qemu-devel/74e2845c5f95b0c139c79233ddb65bb17f2dd679.1710282274.git.mst@redhat.com/ Jonathan Cameron (6): hw/acpi/GI: Fix trivial parameter alignment issue. hw/acpi: Insert an acpi-generic-node base under acpi-generic-initiator hw/acpi: Generic Port Affinity Structure support bios-tables-test: Allow for new acpihmat-generic-x test data. bios-tables-test: Add complex SRAT / HMAT test for GI GP bios-tables-test: Add data for complex numa test (GI, GP etc) qapi/qom.json | 35 ++++ include/hw/acpi/acpi_generic_initiator.h | 33 +++- include/hw/pci/pci_bridge.h | 1 + hw/acpi/acpi_generic_initiator.c | 199 ++++++++++++++------ hw/pci-bridge/pci_expander_bridge.c | 1 - tests/qtest/bios-tables-test.c | 92 +++++++++ tests/data/acpi/q35/APIC.acpihmat-generic-x | Bin 0 -> 136 bytes tests/data/acpi/q35/CEDT.acpihmat-generic-x | Bin 0 -> 68 bytes tests/data/acpi/q35/DSDT.acpihmat-generic-x | Bin 0 -> 10400 bytes tests/data/acpi/q35/HMAT.acpihmat-generic-x | Bin 0 -> 360 bytes tests/data/acpi/q35/SRAT.acpihmat-generic-x | Bin 0 -> 520 bytes 11 files changed, 302 insertions(+), 59 deletions(-) create mode 100644 tests/data/acpi/q35/APIC.acpihmat-generic-x create mode 100644 tests/data/acpi/q35/CEDT.acpihmat-generic-x create mode 100644 tests/data/acpi/q35/DSDT.acpihmat-generic-x create mode 100644 tests/data/acpi/q35/HMAT.acpihmat-generic-x create mode 100644 tests/data/acpi/q35/SRAT.acpihmat-generic-x