From: Thomas Gleixner <tglx@linutronix.de>
To: "Tian, Kevin" <kevin.tian@intel.com>,
LKML <linux-kernel@vger.kernel.org>
Cc: "x86@kernel.org" <x86@kernel.org>, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Marc Zyngier <maz@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jason Gunthorpe <jgg@mellanox.com>,
"Jiang, Dave" <dave.jiang@intel.com>,
Alex Williamson <alex.williamson@redhat.com>,
"Williams, Dan J" <dan.j.williams@intel.com>,
Logan Gunthorpe <logang@deltatee.com>,
"Raj, Ashok" <ashok.raj@intel.com>, Jon Mason <jdmason@kudzu.us>,
Allen Hubbe <allenbh@gmail.com>
Subject: RE: [patch V2 28/33] PCI/MSI: Provide IMS (Interrupt Message Store) support
Date: Thu, 24 Nov 2022 10:10:41 +0100 [thread overview]
Message-ID: <87leo0d8fi.ffs@tglx> (raw)
In-Reply-To: <BN9PR11MB5276549A90576254ACCCBED48C0F9@BN9PR11MB5276.namprd11.prod.outlook.com>
On Thu, Nov 24 2022 at 03:10, Kevin Tian wrote:
>> From: Thomas Gleixner <tglx@linutronix.de>
>> Sent: Monday, November 21, 2022 10:38 PM
>>
>> The IMS domains have a few constraints:
>>
>> - The index space is managed by the core code.
>>
>> Device memory based IMS provides a storage array with a fixed size
>> which obviously requires an index. But there is no association between
>> index and functionality so the core can randomly allocate an index in
>> the array.
>>
>> Queue memory based IMS does not have the concept of an index as the
>> storage is somewhere in memory. In that case the index is purely
>> software based to keep track of the allocations.
>
> 'Queue' could be a HW queue or SW queue. Is it clearer to just use
> 'system memory based IMS" here?
Yes
next prev parent reply other threads:[~2022-11-24 9:10 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-21 14:37 [patch V2 00/33] genirq, PCI/MSI: Support for per device MSI and PCI/IMS - Part 3 implementation Thomas Gleixner
2022-11-21 14:37 ` [patch V2 01/33] genirq/msi: Rearrange MSI domain flags Thomas Gleixner
2022-11-21 14:37 ` [patch V2 02/33] genirq/msi: Provide struct msi_parent_ops Thomas Gleixner
2022-11-23 7:57 ` Tian, Kevin
2022-11-23 11:28 ` Thomas Gleixner
2022-11-24 0:53 ` Tian, Kevin
2022-11-21 14:37 ` [patch V2 03/33] genirq/msi: Provide data structs for per device domains Thomas Gleixner
2022-11-23 7:57 ` Tian, Kevin
2022-11-23 11:29 ` Thomas Gleixner
2022-11-21 14:37 ` [patch V2 04/33] genirq/msi: Add size info to struct msi_domain_info Thomas Gleixner
2022-11-21 14:37 ` [patch V2 05/33] genirq/msi: Split msi_create_irq_domain() Thomas Gleixner
2022-11-21 14:37 ` [patch V2 06/33] genirq/irqdomain: Add irq_domain::dev for per device MSI domains Thomas Gleixner
2022-11-21 14:37 ` [patch V2 07/33] genirq/msi: Provide msi_create/free_device_irq_domain() Thomas Gleixner
2022-11-23 8:02 ` Tian, Kevin
2022-11-23 11:38 ` Thomas Gleixner
2022-11-23 21:01 ` Thomas Gleixner
2022-11-24 1:07 ` Tian, Kevin
2022-11-24 8:36 ` Thomas Gleixner
2022-11-28 1:47 ` Tian, Kevin
2022-11-21 14:37 ` [patch V2 08/33] genirq/msi: Provide msi_match_device_domain() Thomas Gleixner
2022-11-21 14:37 ` [patch V2 09/33] genirq/msi: Add range checking to msi_insert_desc() Thomas Gleixner
2022-11-21 14:37 ` [patch V2 10/33] PCI/MSI: Split __pci_write_msi_msg() Thomas Gleixner
2022-11-21 14:37 ` [patch V2 11/33] genirq/msi: Provide BUS_DEVICE_PCI_MSI[X] Thomas Gleixner
2022-11-21 14:38 ` [patch V2 12/33] PCI/MSI: Add support for per device MSI[X] domains Thomas Gleixner
2022-11-23 8:08 ` Tian, Kevin
2022-11-23 11:41 ` Thomas Gleixner
2022-11-23 21:50 ` Thomas Gleixner
2022-11-24 1:08 ` Tian, Kevin
2022-11-21 14:38 ` [patch V2 13/33] x86/apic/vector: Provide MSI parent domain Thomas Gleixner
2022-11-23 8:16 ` Tian, Kevin
2022-11-23 13:42 ` Thomas Gleixner
2022-11-24 1:10 ` Tian, Kevin
2022-11-21 14:38 ` [patch V2 14/33] PCI/MSI: Remove unused pci_dev_has_special_msi_domain() Thomas Gleixner
2022-11-21 14:38 ` [patch V2 15/33] iommu/vt-d: Switch to MSI parent domains Thomas Gleixner
2022-11-21 14:38 ` [patch V2 16/33] iommu/amd: Switch to MSI base domains Thomas Gleixner
2022-11-21 14:38 ` [patch V2 17/33] x86/apic/msi: Remove arch_create_remap_msi_irq_domain() Thomas Gleixner
2022-11-21 14:38 ` [patch V2 18/33] genirq/msi: Provide struct msi_map Thomas Gleixner
2022-11-21 14:38 ` [patch V2 19/33] genirq/msi: Provide msi_desc::msi_data Thomas Gleixner
2022-11-23 8:27 ` Tian, Kevin
2022-11-23 11:41 ` Thomas Gleixner
2022-11-21 14:38 ` [patch V2 20/33] genirq/msi: Provide msi_domain_ops::prepare_desc() Thomas Gleixner
2022-11-21 14:38 ` [patch V2 21/33] genirq/msi: Provide msi_domain_alloc_irq_at() Thomas Gleixner
2022-11-24 2:54 ` Tian, Kevin
2022-11-21 14:38 ` [patch V2 22/33] genirq/msi: Provide MSI_FLAG_MSIX_ALLOC_DYN Thomas Gleixner
2022-11-21 14:38 ` [patch V2 23/33] PCI/MSI: Split MSI-X descriptor setup Thomas Gleixner
2022-11-21 14:38 ` [patch V2 24/33] PCI/MSI: Provide prepare_desc() MSI domain op Thomas Gleixner
2022-11-21 14:38 ` [patch V2 25/33] PCI/MSI: Provide post-enable dynamic allocation interfaces for MSI-X Thomas Gleixner
2022-11-24 2:58 ` Tian, Kevin
2022-11-24 9:08 ` Thomas Gleixner
2022-11-28 1:49 ` Tian, Kevin
2023-02-21 7:32 ` [tip: irq/urgent] PCI/MSI: Clarify usage of pci_msix_free_irq() tip-bot2 for Reinette Chatre
2022-11-21 14:38 ` [patch V2 26/33] x86/apic/msi: Enable MSI_FLAG_PCI_MSIX_ALLOC_DYN Thomas Gleixner
2022-11-21 14:38 ` [patch V2 27/33] genirq/msi: Provide constants for PCI/IMS support Thomas Gleixner
2022-11-24 3:01 ` Tian, Kevin
2022-11-24 9:10 ` Thomas Gleixner
2022-11-24 13:09 ` Jason Gunthorpe
2022-11-24 13:28 ` Thomas Gleixner
2022-11-21 14:38 ` [patch V2 28/33] PCI/MSI: Provide IMS (Interrupt Message Store) support Thomas Gleixner
2022-11-24 3:10 ` Tian, Kevin
2022-11-24 9:10 ` Thomas Gleixner [this message]
2022-11-21 14:38 ` [patch V2 29/33] PCI/MSI: Provide pci_ims_alloc/free_irq() Thomas Gleixner
2022-11-24 3:11 ` Tian, Kevin
2022-11-21 14:38 ` [patch V2 30/33] x86/apic/msi: Enable PCI/IMS Thomas Gleixner
2022-11-21 14:38 ` [patch V2 31/33] iommu/vt-d: " Thomas Gleixner
2022-11-24 3:17 ` Tian, Kevin
2022-11-24 9:37 ` Thomas Gleixner
2022-11-24 13:14 ` Jason Gunthorpe
2022-11-24 13:21 ` Thomas Gleixner
2022-11-28 1:54 ` Tian, Kevin
2022-11-21 14:38 ` [patch V2 32/33] iommu/amd: " Thomas Gleixner
2022-11-21 14:38 ` [patch V2 33/33] irqchip: Add IDXD Interrupt Message Store driver Thomas Gleixner
2022-11-24 3:19 ` Tian, Kevin
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