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From: "Alex Bennée" <alex.bennee@linaro.org>
To: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
	"Ben Widawsky" <ben.widawsky@intel.com>,
	"Michael S . Tsirkin" <mst@redhat.com>,
	"Samarth Saxena" <samarths@cadence.com>,
	"Chris Browy" <cbrowy@avery-design.com>,
	qemu-devel@nongnu.org, linux-cxl@vger.kernel.org,
	linuxarm@huawei.com, "Shreyas Shah" <shreyas.shah@elastics.cloud>,
	"Saransh Gupta1" <saransh@ibm.com>,
	"Shameerali Kolothum Thodi"
	<shameerali.kolothum.thodi@huawei.com>,
	"Marcel Apfelbaum" <marcel@redhat.com>,
	"Igor Mammedov" <imammedo@redhat.com>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: Re: [PATCH v4 01/42] hw/pci/cxl: Add a CXL component type (interface)
Date: Tue, 25 Jan 2022 13:53:45 +0000	[thread overview]
Message-ID: <875yq7exao.fsf@linaro.org> (raw)
In-Reply-To: <20220124171705.10432-2-Jonathan.Cameron@huawei.com>


Jonathan Cameron <Jonathan.Cameron@huawei.com> writes:

> From: Ben Widawsky <ben.widawsky@intel.com>
>
> A CXL component is a hardware entity that implements CXL component
> registers from the CXL 2.0 spec (8.2.3). Currently these represent 3
> general types.
> 1. Host Bridge
> 2. Ports (root, upstream, downstream)
> 3. Devices (memory, other)
>
> A CXL component can be conceptually thought of as a PCIe device with
> extra functionality when enumerated and enabled. For this reason, CXL
> does here, and will continue to add on to existing PCI code paths.
>
> Host bridges will typically need to be handled specially and so they can
> implement this newly introduced interface or not. All other components
> should implement this interface. Implementing this interface allows the
> core PCI code to treat these devices as special where appropriate.
>
> Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée


  reply	other threads:[~2022-01-25 15:05 UTC|newest]

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-24 17:16 [PATCH v4 00/42] CXl 2.0 emulation Support Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 01/42] hw/pci/cxl: Add a CXL component type (interface) Jonathan Cameron via
2022-01-25 13:53   ` Alex Bennée [this message]
2022-01-24 17:16 ` [PATCH v4 02/42] hw/cxl/component: Introduce CXL components (8.1.x, 8.2.5) Jonathan Cameron via
2022-01-26 12:32   ` Alex Bennée
2022-01-28 14:22     ` Jonathan Cameron via
2022-01-28 14:46       ` Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 03/42] MAINTAINERS: Add entry for Compute Express Link Emulation Jonathan Cameron via
2022-01-26 18:06   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 04/42] hw/cxl/device: Introduce a CXL device (8.2.8) Jonathan Cameron via
2022-01-26 18:07   ` Alex Bennée
2022-01-28 15:02     ` Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 05/42] hw/cxl/device: Implement the CAP array (8.2.8.1-2) Jonathan Cameron via
2022-01-26 18:17   ` Alex Bennée
2022-01-28 15:16     ` Jonathan Cameron via
2022-01-28 16:37       ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 06/42] hw/cxl/device: Implement basic mailbox (8.2.8.4) Jonathan Cameron via
2022-01-26 18:22   ` Alex Bennée
2022-01-28 15:52     ` Jonathan Cameron via
2022-01-27 11:31   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 07/42] hw/cxl/device: Add memory device utilities Jonathan Cameron via
2022-01-27 11:28   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 08/42] hw/cxl/device: Add cheap EVENTS implementation (8.2.9.1) Jonathan Cameron via
2022-01-27 11:43   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 09/42] hw/cxl/device: Timestamp implementation (8.2.9.3) Jonathan Cameron via
2022-01-27 11:50   ` Alex Bennée
2022-01-28 17:52     ` Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 10/42] hw/cxl/device: Add log commands (8.2.9.4) + CEL Jonathan Cameron via
2022-01-27 11:55   ` Alex Bennée
2022-01-28 16:47     ` Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 11/42] hw/pxb: Use a type for realizing expanders Jonathan Cameron via
2022-01-27 12:01   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 12/42] hw/pci/cxl: Create a CXL bus type Jonathan Cameron via
2022-01-27 12:05   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 13/42] hw/pxb: Allow creation of a CXL PXB (host bridge) Jonathan Cameron via
2022-01-27 13:59   ` Alex Bennée
2022-01-28 18:20     ` Jonathan Cameron via
2022-01-28 18:48       ` Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 14/42] tests/acpi: allow DSDT.viot table changes Jonathan Cameron via
2022-01-27 14:06   ` Alex Bennée
2022-01-28 18:26     ` Jonathan Cameron via
2022-01-28 18:34       ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 15/42] acpi/pci: Consolidate host bridge setup Jonathan Cameron via
2022-01-27 14:10   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 16/42] tests/acpi: Add update DSDT.viot Jonathan Cameron via
2022-01-27 14:12   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 17/42] cxl: Machine level control on whether CXL support is enabled Jonathan Cameron via
2022-01-27 14:18   ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 18/42] hw/cxl/component: Implement host bridge MMIO (8.2.5, table 142) Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 19/42] hw/cxl/rp: Add a root port Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 20/42] hw/cxl/device: Add a memory device (8.2.8.5) Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 21/42] hw/cxl/device: Implement MMIO HDM decoding (8.2.5.12) Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 22/42] acpi/cxl: Add _OSC implementation (9.14.2) Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 23/42] tests/acpi: allow CEDT table addition Jonathan Cameron via
2022-02-09 18:18   ` Jonathan Cameron via
2022-02-09 19:09     ` Michael S. Tsirkin
2022-01-24 17:16 ` [PATCH v4 24/42] acpi/cxl: Create the CEDT (9.14.1) Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 25/42] hw/cxl/device: Add some trivial commands Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 26/42] hw/cxl/device: Plumb real Label Storage Area (LSA) sizing Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 27/42] hw/cxl/device: Implement get/set Label Storage Area (LSA) Jonathan Cameron via
2022-01-28 17:29   ` Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 28/42] hw/cxl/component: Add utils for interleave parameter encoding/decoding Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 29/42] hw/cxl/host: Add support for CXL Fixed Memory Windows Jonathan Cameron via
2022-01-25 17:02   ` Alex Bennée
2022-01-25 17:51     ` Jonathan Cameron via
2022-01-25 22:53       ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 30/42] acpi/cxl: Introduce CFMWS structures in CEDT Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 31/42] hw/pci-host/gpex-acpi: Add support for dsdt construction for pxb-cxl Jonathan Cameron via
2022-01-25 17:15   ` Alex Bennée
2022-01-25 18:13     ` Jonathan Cameron via
2022-01-25 18:16       ` Michael S. Tsirkin
2022-01-26 12:24       ` Alex Bennée
2022-01-24 17:16 ` [PATCH v4 32/42] pci/pcie_port: Add pci_find_port_by_pn() Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 33/42] CXL/cxl_component: Add cxl_get_hb_cstate() Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 34/42] mem/cxl_type3: Add read and write functions for associated hostmem Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 35/42] cxl/cxl-host: Add memops for CFMWS region Jonathan Cameron via
2022-01-24 17:16 ` [PATCH v4 36/42] arm/virt: Allow virt/CEDT creation Jonathan Cameron via
2022-01-24 17:17 ` [PATCH v4 37/42] hw/arm/virt: Basic CXL enablement on pci_expander_bridge instances pxb-cxl Jonathan Cameron via
2022-01-24 17:17 ` [PATCH v4 38/42] RFC: softmmu/memory: Add ops to memory_region_ram_init_from_file Jonathan Cameron via
2022-01-24 17:17 ` [PATCH v4 39/42] hw/cxl/component Add a dumb HDM decoder handler Jonathan Cameron via
2022-01-24 17:17 ` [PATCH v4 40/42] i386/pc: Enable CXL fixed memory windows Jonathan Cameron via
2022-01-24 17:17 ` [PATCH v4 41/42] qtest/acpi: Add reference CEDT tables Jonathan Cameron via
2022-01-24 17:17 ` [PATCH v4 42/42] qtest/cxl: Add very basic sanity tests Jonathan Cameron via
2022-01-24 18:11 ` [PATCH v4 00/42] CXl 2.0 emulation Support Jonathan Cameron via
2022-01-25 13:55 ` Alex Bennée
2022-01-25 15:49   ` Jonathan Cameron via
2022-01-25 19:18 ` Ben Widawsky
2022-01-25 23:55   ` Ben Widawsky
2022-01-26  9:46     ` Jonathan Cameron via
2022-01-27 14:22 ` Alex Bennée
2022-01-27 16:42   ` Jonathan Cameron via

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