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From: Jason Gunthorpe <jgg@nvidia.com>
To: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	ankita@nvidia.com, maz@kernel.org, oliver.upton@linux.dev,
	will@kernel.org, aniketa@nvidia.com, cjia@nvidia.com,
	kwankhede@nvidia.com, targupta@nvidia.com, vsethi@nvidia.com,
	acurrid@nvidia.com, apopple@nvidia.com, jhubbard@nvidia.com,
	danw@nvidia.com, linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 2/2] KVM: arm64: allow the VM to select DEVICE_* and NORMAL_NC for IO memory
Date: Thu, 5 Oct 2023 08:56:30 -0300	[thread overview]
Message-ID: <20231005115630.GL682044@nvidia.com> (raw)
In-Reply-To: <ZR6IZwcFNw55asW0@lpieralisi>

On Thu, Oct 05, 2023 at 11:56:55AM +0200, Lorenzo Pieralisi wrote:
> On Tue, Sep 26, 2023 at 02:52:13PM +0100, Catalin Marinas wrote:
> 
> [...]
> 
> > Anyway, the text looks fine to me. Thanks for putting it together
> > Lorenzo.
> 
> Thanks !
> 
> > One thing not mentioned here is that pci-vfio still maps such memory as
> > Device-nGnRnE in user space and relaxing this potentially creates an
> > alias. But such alias is only relevant of both the VMM and the VM try to
> > access the same device which I doubt is a realistic scenario.
> 
> A revised log, FWIW:

What is the plan here, do you want Ankit to resend the series with
this text?

There were no comments on patch 1/2?

Thanks,
Jason

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@nvidia.com>
To: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	ankita@nvidia.com, maz@kernel.org, oliver.upton@linux.dev,
	will@kernel.org, aniketa@nvidia.com, cjia@nvidia.com,
	kwankhede@nvidia.com, targupta@nvidia.com, vsethi@nvidia.com,
	acurrid@nvidia.com, apopple@nvidia.com, jhubbard@nvidia.com,
	danw@nvidia.com, linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 2/2] KVM: arm64: allow the VM to select DEVICE_* and NORMAL_NC for IO memory
Date: Thu, 5 Oct 2023 08:56:30 -0300	[thread overview]
Message-ID: <20231005115630.GL682044@nvidia.com> (raw)
In-Reply-To: <ZR6IZwcFNw55asW0@lpieralisi>

On Thu, Oct 05, 2023 at 11:56:55AM +0200, Lorenzo Pieralisi wrote:
> On Tue, Sep 26, 2023 at 02:52:13PM +0100, Catalin Marinas wrote:
> 
> [...]
> 
> > Anyway, the text looks fine to me. Thanks for putting it together
> > Lorenzo.
> 
> Thanks !
> 
> > One thing not mentioned here is that pci-vfio still maps such memory as
> > Device-nGnRnE in user space and relaxing this potentially creates an
> > alias. But such alias is only relevant of both the VMM and the VM try to
> > access the same device which I doubt is a realistic scenario.
> 
> A revised log, FWIW:

What is the plan here, do you want Ankit to resend the series with
this text?

There were no comments on patch 1/2?

Thanks,
Jason

  reply	other threads:[~2023-10-05 11:57 UTC|newest]

Thread overview: 110+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-07 18:14 [PATCH v1 0/2] KVM: arm64: support write combining and cachable IO memory in VMs ankita
2023-09-07 18:14 ` ankita
2023-09-07 18:14 ` [PATCH v1 1/2] KVM: arm64: determine memory type from VMA ankita
2023-09-07 18:14   ` ankita
2023-09-07 19:12   ` Jason Gunthorpe
2023-09-07 19:12     ` Jason Gunthorpe
2023-10-05 16:15   ` Catalin Marinas
2023-10-05 16:15     ` Catalin Marinas
2023-10-05 16:54     ` Jason Gunthorpe
2023-10-05 16:54       ` Jason Gunthorpe
2023-10-10 14:25       ` Catalin Marinas
2023-10-10 14:25         ` Catalin Marinas
2023-10-10 15:05         ` Jason Gunthorpe
2023-10-10 15:05           ` Jason Gunthorpe
2023-10-10 17:19           ` Catalin Marinas
2023-10-10 17:19             ` Catalin Marinas
2023-10-10 18:23             ` Jason Gunthorpe
2023-10-10 18:23               ` Jason Gunthorpe
2023-10-11 17:45               ` Catalin Marinas
2023-10-11 17:45                 ` Catalin Marinas
2023-10-11 18:38                 ` Jason Gunthorpe
2023-10-11 18:38                   ` Jason Gunthorpe
2023-10-12 16:16                   ` Catalin Marinas
2023-10-12 16:16                     ` Catalin Marinas
2024-03-10  3:49                     ` Ankit Agrawal
2024-03-10  3:49                       ` Ankit Agrawal
2024-03-19 13:38                       ` Jason Gunthorpe
2024-03-19 13:38                         ` Jason Gunthorpe
2023-10-23 13:20   ` Shameerali Kolothum Thodi
2023-10-23 13:20     ` Shameerali Kolothum Thodi
2023-09-07 18:14 ` [PATCH v1 2/2] KVM: arm64: allow the VM to select DEVICE_* and NORMAL_NC for IO memory ankita
2023-09-07 18:14   ` ankita
2023-09-08 16:40   ` Catalin Marinas
2023-09-08 16:40     ` Catalin Marinas
2023-09-11 14:57   ` Lorenzo Pieralisi
2023-09-11 14:57     ` Lorenzo Pieralisi
2023-09-11 17:20     ` Jason Gunthorpe
2023-09-11 17:20       ` Jason Gunthorpe
2023-09-13 15:26       ` Lorenzo Pieralisi
2023-09-13 15:26         ` Lorenzo Pieralisi
2023-09-13 18:54         ` Jason Gunthorpe
2023-09-13 18:54           ` Jason Gunthorpe
2023-09-26  8:31           ` Lorenzo Pieralisi
2023-09-26  8:31             ` Lorenzo Pieralisi
2023-09-26 12:25             ` Jason Gunthorpe
2023-09-26 12:25               ` Jason Gunthorpe
2023-09-26 13:52             ` Catalin Marinas
2023-09-26 13:52               ` Catalin Marinas
2023-09-26 16:12               ` Lorenzo Pieralisi
2023-09-26 16:12                 ` Lorenzo Pieralisi
2023-10-05  9:56               ` Lorenzo Pieralisi
2023-10-05  9:56                 ` Lorenzo Pieralisi
2023-10-05 11:56                 ` Jason Gunthorpe [this message]
2023-10-05 11:56                   ` Jason Gunthorpe
2023-10-05 14:08                   ` Lorenzo Pieralisi
2023-10-05 14:08                     ` Lorenzo Pieralisi
2023-10-12 12:35                 ` Will Deacon
2023-10-12 12:35                   ` Will Deacon
2023-10-12 13:20                   ` Jason Gunthorpe
2023-10-12 13:20                     ` Jason Gunthorpe
2023-10-12 14:29                     ` Lorenzo Pieralisi
2023-10-12 14:29                       ` Lorenzo Pieralisi
2023-10-12 13:53                   ` Catalin Marinas
2023-10-12 13:53                     ` Catalin Marinas
2023-10-12 14:48                     ` Will Deacon
2023-10-12 14:48                       ` Will Deacon
2023-10-12 15:44                       ` Jason Gunthorpe
2023-10-12 15:44                         ` Jason Gunthorpe
2023-10-12 16:39                         ` Will Deacon
2023-10-12 16:39                           ` Will Deacon
2023-10-12 18:36                           ` Jason Gunthorpe
2023-10-12 18:36                             ` Jason Gunthorpe
2023-10-13  9:29                             ` Will Deacon
2023-10-13  9:29                               ` Will Deacon
2023-10-12 17:26                       ` Catalin Marinas
2023-10-12 17:26                         ` Catalin Marinas
2023-10-13  9:29                         ` Will Deacon
2023-10-13  9:29                           ` Will Deacon
2023-10-13 13:08                           ` Catalin Marinas
2023-10-13 13:08                             ` Catalin Marinas
2023-10-13 13:45                             ` Jason Gunthorpe
2023-10-13 13:45                               ` Jason Gunthorpe
2023-10-19 11:07                               ` Catalin Marinas
2023-10-19 11:07                                 ` Catalin Marinas
2023-10-19 11:51                                 ` Jason Gunthorpe
2023-10-19 11:51                                   ` Jason Gunthorpe
2023-10-20 11:21                                   ` Catalin Marinas
2023-10-20 11:21                                     ` Catalin Marinas
2023-10-20 11:47                                     ` Jason Gunthorpe
2023-10-20 11:47                                       ` Jason Gunthorpe
2023-10-20 14:03                                       ` Lorenzo Pieralisi
2023-10-20 14:03                                         ` Lorenzo Pieralisi
2023-10-20 14:28                                         ` Jason Gunthorpe
2023-10-20 14:28                                           ` Jason Gunthorpe
2023-10-19 13:35                                 ` Lorenzo Pieralisi
2023-10-19 13:35                                   ` Lorenzo Pieralisi
2023-10-13 15:28                             ` Lorenzo Pieralisi
2023-10-13 15:28                               ` Lorenzo Pieralisi
2023-10-19 11:12                               ` Catalin Marinas
2023-10-19 11:12                                 ` Catalin Marinas
2023-11-09 15:34                             ` Lorenzo Pieralisi
2023-11-09 15:34                               ` Lorenzo Pieralisi
2023-11-10 14:26                               ` Jason Gunthorpe
2023-11-10 14:26                                 ` Jason Gunthorpe
2023-11-13  0:42                                 ` Lorenzo Pieralisi
2023-11-13  0:42                                   ` Lorenzo Pieralisi
2023-11-13 17:41                               ` Catalin Marinas
2023-11-13 17:41                                 ` Catalin Marinas
2023-10-12 12:27   ` Will Deacon
2023-10-12 12:27     ` Will Deacon

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