From: Christoph Hellwig <hch@infradead.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>,
Saheed Bolarinwa <refactormyself@gmail.com>,
trix@redhat.com, Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Joerg Roedel <joro@8bytes.org>,
bjorn@helgaas.com, skhan@linuxfoundation.org,
linux-kernel-mentees@lists.linuxfoundation.org,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-mtd@lists.infradead.org, iommu@lists.linux-foundation.org,
linux-rdma@vger.kernel.org, linux-ide@vger.kernel.org,
linux-i2c@vger.kernel.org, linux-hwmon@vger.kernel.org,
dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
linux-gpio@vger.kernel.org, linux-fpga@vger.kernel.org,
linux-edac@vger.kernel.org, dmaengine@vger.kernel.org,
linux-crypto@vger.kernel.org,
linux-atm-general@lists.sourceforge.net
Subject: Re: [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Mon, 3 Aug 2020 07:56:29 +0100 [thread overview]
Message-ID: <20200803065629.GA19534@infradead.org> (raw)
In-Reply-To: <20200802191406.GA248232@bjorn-Precision-5520>
On Sun, Aug 02, 2020 at 02:14:06PM -0500, Bjorn Helgaas wrote:
> But what guarantees that a PCI config register cannot contain ~0?
> If there's something about that in the spec I'd love to know where it
> is because it would simplify a lot of things.
There isn't. An we even have cases like the NVMe controller memory
buffer and persistent memory region, which are BARs that store
abritrary values for later retreival, so it can't. (now those
features have a major issue with error detection, but that is another
issue)
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Joerg Roedel <joro@8bytes.org>,
linux-atm-general@lists.sourceforge.net, trix@redhat.com,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Borislav Petkov <bp@alien8.de>,
skhan@linuxfoundation.org, bjorn@helgaas.com,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
Saheed Bolarinwa <refactormyself@gmail.com>,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org, linux-crypto@vger.kernel.org,
netdev@vger.kernel.org, dmaengine@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Mon, 3 Aug 2020 07:56:29 +0100 [thread overview]
Message-ID: <20200803065629.GA19534@infradead.org> (raw)
In-Reply-To: <20200802191406.GA248232@bjorn-Precision-5520>
On Sun, Aug 02, 2020 at 02:14:06PM -0500, Bjorn Helgaas wrote:
> But what guarantees that a PCI config register cannot contain ~0?
> If there's something about that in the spec I'd love to know where it
> is because it would simplify a lot of things.
There isn't. An we even have cases like the NVMe controller memory
buffer and persistent memory region, which are BARs that store
abritrary values for later retreival, so it can't. (now those
features have a major issue with error detection, but that is another
issue)
______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
linux-atm-general@lists.sourceforge.net, trix@redhat.com,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Borislav Petkov <bp@alien8.de>,
skhan@linuxfoundation.org, bjorn@helgaas.com,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
Saheed Bolarinwa <refactormyself@gmail.com>,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org, linux-crypto@vger.kernel.org,
netdev@vger.kernel.org, dmaengine@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Mon, 3 Aug 2020 07:56:29 +0100 [thread overview]
Message-ID: <20200803065629.GA19534@infradead.org> (raw)
In-Reply-To: <20200802191406.GA248232@bjorn-Precision-5520>
On Sun, Aug 02, 2020 at 02:14:06PM -0500, Bjorn Helgaas wrote:
> But what guarantees that a PCI config register cannot contain ~0?
> If there's something about that in the spec I'd love to know where it
> is because it would simplify a lot of things.
There isn't. An we even have cases like the NVMe controller memory
buffer and persistent memory region, which are BARs that store
abritrary values for later retreival, so it can't. (now those
features have a major issue with error detection, but that is another
issue)
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Joerg Roedel <joro@8bytes.org>,
linux-atm-general@lists.sourceforge.net, trix@redhat.com,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Borislav Petkov <bp@alien8.de>, Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
Saheed Bolarinwa <refactormyself@gmail.com>,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org, linux-crypto@vger.kernel.org,
netdev@vger.kernel.org, dmaengine@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [Linux-kernel-mentees] [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Mon, 3 Aug 2020 07:56:29 +0100 [thread overview]
Message-ID: <20200803065629.GA19534@infradead.org> (raw)
In-Reply-To: <20200802191406.GA248232@bjorn-Precision-5520>
On Sun, Aug 02, 2020 at 02:14:06PM -0500, Bjorn Helgaas wrote:
> But what guarantees that a PCI config register cannot contain ~0?
> If there's something about that in the spec I'd love to know where it
> is because it would simplify a lot of things.
There isn't. An we even have cases like the NVMe controller memory
buffer and persistent memory region, which are BARs that store
abritrary values for later retreival, so it can't. (now those
features have a major issue with error detection, but that is another
issue)
_______________________________________________
Linux-kernel-mentees mailing list
Linux-kernel-mentees@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
linux-pci@vger.kernel.org, linux-fpga@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-ide@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>,
linux-rdma@vger.kernel.org, Richard Weinberger <richard@nod.at>,
Joerg Roedel <joro@8bytes.org>,
linux-atm-general@lists.sourceforge.net, trix@redhat.com,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel-mentees@lists.linuxfoundation.org,
Wolfgang Grandegger <wg@grandegger.com>,
intel-gfx@lists.freedesktop.org, linux-gpio@vger.kernel.org,
Borislav Petkov <bp@alien8.de>,
skhan@linuxfoundation.org, bjorn@helgaas.com,
Kalle Valo <kvalo@codeaurora.org>,
linux-edac@vger.kernel.org, linux-hwmon@vger.kernel.org,
Saheed Bolarinwa <refactormyself@gmail.com>,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org, linux-crypto@vger.kernel.org,
netdev@vger.kernel.org, dmaengine@vger.kernel.org,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [Intel-gfx] [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value
Date: Mon, 3 Aug 2020 07:56:29 +0100 [thread overview]
Message-ID: <20200803065629.GA19534@infradead.org> (raw)
In-Reply-To: <20200802191406.GA248232@bjorn-Precision-5520>
On Sun, Aug 02, 2020 at 02:14:06PM -0500, Bjorn Helgaas wrote:
> But what guarantees that a PCI config register cannot contain ~0?
> If there's something about that in the spec I'd love to know where it
> is because it would simplify a lot of things.
There isn't. An we even have cases like the NVMe controller memory
buffer and persistent memory region, which are BARs that store
abritrary values for later retreival, so it can't. (now those
features have a major issue with error detection, but that is another
issue)
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2020-08-03 6:57 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-01 11:24 [RFC PATCH 00/17] Drop uses of pci_read_config_*() return value Saheed O. Bolarinwa
2020-08-01 11:24 ` [Intel-gfx] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 01/17] ata: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 02/17] atm: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-05 10:51 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 03/17] bcma: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 04/17] hwrng: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 05/17] dmaengine: ioat: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 06/17] edac: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 21:38 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 07/17] fpga: altera-cvp: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 22:32 ` kernel test robot
2020-08-05 12:31 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 08/17] gpio: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-18 19:59 ` Bartosz Golaszewski
2020-08-18 19:59 ` [Linux-kernel-mentees] " Bartosz Golaszewski
2020-08-19 2:21 ` Bjorn Helgaas
2020-08-19 2:21 ` [Linux-kernel-mentees] " Bjorn Helgaas
2020-08-01 11:24 ` [RFC PATCH 09/17] drm/i915/vga: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Intel-gfx] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 10/17] hwmon: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-04 21:26 ` Guenter Roeck
2020-08-04 21:26 ` [Linux-kernel-mentees] " Guenter Roeck
2020-08-01 11:24 ` [RFC PATCH 11/17] intel_th: pci: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 12/17] i2c: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 13/17] ide: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 14/17] IB: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 14:18 ` kernel test robot
2020-08-01 11:24 ` [RFC PATCH 15/17] iommu/vt-d: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 16/17] mtd: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 11:24 ` Saheed O. Bolarinwa
2020-08-01 11:24 ` [RFC PATCH 17/17] net: " Saheed O. Bolarinwa
2020-08-01 11:24 ` [Linux-kernel-mentees] " Saheed O. Bolarinwa
2020-08-01 14:58 ` kernel test robot
2020-08-01 12:56 ` [RFC PATCH 00/17] " Borislav Petkov
2020-08-01 12:56 ` [Intel-gfx] " Borislav Petkov
2020-08-01 12:56 ` Borislav Petkov
2020-08-01 12:56 ` [Linux-kernel-mentees] " Borislav Petkov
2020-08-01 12:56 ` Borislav Petkov
2020-08-01 12:56 ` Borislav Petkov
2020-08-02 14:53 ` Tom Rix
2020-08-02 14:53 ` [Intel-gfx] " Tom Rix
2020-08-02 14:53 ` Tom Rix
2020-08-02 14:53 ` [Linux-kernel-mentees] " Tom Rix
2020-08-02 14:53 ` Tom Rix
2020-08-02 14:53 ` Tom Rix
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 17:28 ` [Intel-gfx] " Saheed Bolarinwa
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 17:28 ` [Linux-kernel-mentees] " Saheed Bolarinwa
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 17:28 ` Saheed Bolarinwa
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 18:46 ` [Intel-gfx] " Borislav Petkov
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 18:46 ` [Linux-kernel-mentees] " Borislav Petkov
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 18:46 ` Borislav Petkov
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 19:14 ` [Intel-gfx] " Bjorn Helgaas
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 19:14 ` [Linux-kernel-mentees] " Bjorn Helgaas
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 19:14 ` Bjorn Helgaas
2020-08-02 20:18 ` Borislav Petkov
2020-08-02 20:18 ` [Intel-gfx] " Borislav Petkov
2020-08-02 20:18 ` Borislav Petkov
2020-08-02 20:18 ` [Linux-kernel-mentees] " Borislav Petkov
2020-08-02 20:18 ` Borislav Petkov
2020-08-02 20:18 ` Borislav Petkov
2020-08-03 6:56 ` Christoph Hellwig [this message]
2020-08-03 6:56 ` [Intel-gfx] " Christoph Hellwig
2020-08-03 6:56 ` [Linux-kernel-mentees] " Christoph Hellwig
2020-08-03 6:56 ` Christoph Hellwig
2020-08-03 6:56 ` Christoph Hellwig
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