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From: Nick Kossifidis <mick@ics.forth.gr>
To: Zong Li <zong.li@sifive.com>
Cc: Tomasz Jeznach <tjeznach@rivosinc.com>,
	Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Anup Patel <apatel@ventanamicro.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	linux@rivosinc.com, linux-kernel@vger.kernel.org,
	Sebastien Boeuf <seb@rivosinc.com>,
	iommu@lists.linux.dev, Palmer Dabbelt <palmer@dabbelt.com>,
	linux-riscv@lists.infradead.org
Subject: Re: [PATCH 06/11] RISC-V: drivers/iommu/riscv: Add command, fault, page-req queues
Date: Tue, 1 Aug 2023 02:35:20 +0300	[thread overview]
Message-ID: <dc3974f0-500c-b7d3-c8ca-df069dbd02a8@ics.forth.gr> (raw)
In-Reply-To: <CANXhq0puxuHA2cEyb2+TobkoFTc=7MQqtv7DYbuZdvf0T8+iUQ@mail.gmail.com>

On 7/31/23 16:15, Zong Li wrote:
> On Mon, Jul 31, 2023 at 5:32 PM Nick Kossifidis <mick@ics.forth.gr> wrote:
>>
>> On 7/29/23 15:58, Zong Li wrote:
>>> On Thu, Jul 20, 2023 at 3:34 AM Tomasz Jeznach <tjeznach@rivosinc.com> wrote:
>>>> +       iommu->cap = riscv_iommu_readq(iommu, RISCV_IOMMU_REG_CAP);
>>>> +
>>>> +       /* For now we only support WSIs until we have AIA support */
>>>
>>> I'm not completely understand AIA support here, because I saw the pci
>>> case uses the MSI, and kernel seems to have the AIA implementation.
>>> Could you please elaborate it?
>>>
>>
>> When I wrote this we didn't have AIA in the kernel, and without IMSIC we
>> can't have MSIs in the hart (we can still have MSIs in the PCIe controller).
> 
> Thanks for your clarification, do we support the MSI in next version?
> 

I don't think there is an IOMMU implementation out there (emulated or in 
hw) that can do MSIs and is not a pcie device (the QEMU implementation 
is a pcie device). If we have something to test this against, and we 
also have an IMSIC etc, we can work on that.

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  reply	other threads:[~2023-07-31 23:35 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-19 19:33 [PATCH 00/13] Linux RISC-V IOMMU Support Tomasz Jeznach
2023-07-19 19:33 ` [PATCH 01/11] RISC-V: drivers/iommu: Add RISC-V IOMMU - Ziommu support Tomasz Jeznach
2023-07-19 20:49   ` Conor Dooley
2023-07-19 21:43     ` Tomasz Jeznach
2023-07-20 19:27       ` Conor Dooley
2023-07-21  9:44       ` Conor Dooley
2023-07-20 10:38   ` Baolu Lu
2023-07-20 12:31   ` Baolu Lu
2023-07-20 17:30     ` Tomasz Jeznach
2023-07-28  2:42   ` Zong Li
2023-08-02 20:15     ` Tomasz Jeznach
2023-08-02 20:25       ` Conor Dooley
2023-08-03  3:37       ` Zong Li
2023-08-03  0:18   ` Jason Gunthorpe
2023-08-03  8:27   ` Zong Li
2023-08-16 18:05   ` Robin Murphy
2024-04-13 10:15   ` Xingyou Chen
2023-07-19 19:33 ` [PATCH 02/11] RISC-V: arch/riscv/config: enable RISC-V IOMMU support Tomasz Jeznach
2023-07-19 20:22   ` Conor Dooley
2023-07-19 21:07     ` Tomasz Jeznach
2023-07-20  6:37       ` Krzysztof Kozlowski
2023-07-19 19:33 ` [PATCH 03/11] dt-bindings: Add RISC-V IOMMU bindings Tomasz Jeznach
2023-07-19 20:19   ` Conor Dooley
     [not found]     ` <CAH2o1u6CZSb7pXcaXmh7dJQmNZYh3uORk4x7vJPrb+uCwFdU5g@mail.gmail.com>
2023-07-19 20:57       ` Conor Dooley
2023-07-19 21:37     ` Rob Herring
2023-07-19 23:04       ` Tomasz Jeznach
2023-07-24  8:03   ` Zong Li
2023-07-24 10:02     ` Anup Patel
2023-07-24 11:31       ` Zong Li
2023-07-24 12:10         ` Anup Patel
2023-07-24 13:23           ` Zong Li
2023-07-26  3:21             ` Baolu Lu
2023-07-26  4:26               ` Zong Li
2023-07-26 12:17                 ` Jason Gunthorpe
2023-07-27  2:42                   ` Zong Li
2023-08-09 14:57                     ` Jason Gunthorpe
2023-08-15  1:28                       ` Zong Li
2023-08-15 18:38                         ` Jason Gunthorpe
2023-08-16  2:16                           ` Zong Li
2023-08-16  4:10                             ` Baolu Lu
2023-07-19 19:33 ` [PATCH 04/11] MAINTAINERS: Add myself for RISC-V IOMMU driver Tomasz Jeznach
2023-07-20 12:42   ` Baolu Lu
2023-07-20 17:32     ` Tomasz Jeznach
2023-07-19 19:33 ` [PATCH 05/11] RISC-V: drivers/iommu/riscv: Add sysfs interface Tomasz Jeznach
2023-07-20  6:38   ` Krzysztof Kozlowski
2023-07-20 18:30     ` Tomasz Jeznach
2023-07-20 21:37       ` Krzysztof Kozlowski
2023-07-20 22:08         ` Conor Dooley
2023-07-21  3:49           ` Tomasz Jeznach
2023-07-20 12:50   ` Baolu Lu
2023-07-20 17:47     ` Tomasz Jeznach
2023-07-19 19:33 ` [PATCH 06/11] RISC-V: drivers/iommu/riscv: Add command, fault, page-req queues Tomasz Jeznach
2023-07-20  3:11   ` Nick Kossifidis
2023-07-20 18:00     ` Tomasz Jeznach
2023-07-20 18:43       ` Conor Dooley
2023-07-24  9:47       ` Zong Li
2023-07-28  5:18         ` Tomasz Jeznach
2023-07-28  8:48           ` Zong Li
2023-07-20 13:08   ` Baolu Lu
2023-07-20 17:49     ` Tomasz Jeznach
2023-07-29 12:58   ` Zong Li
2023-07-31  9:32     ` Nick Kossifidis
2023-07-31 13:15       ` Zong Li
2023-07-31 23:35         ` Nick Kossifidis [this message]
2023-08-01  0:37           ` Zong Li
2023-08-02 20:28             ` Tomasz Jeznach
2023-08-02 20:50     ` Tomasz Jeznach
2023-08-03  8:24       ` Zong Li
2023-08-16 18:49   ` Robin Murphy
2023-07-19 19:33 ` [PATCH 07/11] RISC-V: drivers/iommu/riscv: Add device context support Tomasz Jeznach
2023-08-16 19:08   ` Robin Murphy
2023-07-19 19:33 ` [PATCH 08/11] RISC-V: drivers/iommu/riscv: Add page table support Tomasz Jeznach
2023-07-25 13:13   ` Zong Li
2023-07-31  7:19   ` Zong Li
2023-08-16 21:04   ` Robin Murphy
2023-07-19 19:33 ` [PATCH 09/11] RISC-V: drivers/iommu/riscv: Add SVA with PASID/ATS/PRI support Tomasz Jeznach
2023-07-31  9:04   ` Zong Li
2023-07-19 19:33 ` [PATCH 10/11] RISC-V: drivers/iommu/riscv: Add MSI identity remapping Tomasz Jeznach
2023-07-31  8:02   ` Zong Li
2023-08-16 21:43   ` Robin Murphy
2023-07-19 19:33 ` [PATCH 11/11] RISC-V: drivers/iommu/riscv: Add G-Stage translation support Tomasz Jeznach
2023-07-31  8:12   ` Zong Li
2023-08-16 21:13   ` Robin Murphy
     [not found] ` <CAHCEehJKYu3-GSX2L6L4_VVvYt1MagRgPJvYTbqekrjPw3ZSkA@mail.gmail.com>
2024-02-23 14:04   ` [PATCH 00/13] Linux RISC-V IOMMU Support Zong Li
2024-04-04 17:37     ` Tomasz Jeznach
2024-04-10  5:38       ` Zong Li

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