linux-kernel - Re: [PATCH v9 5/5] Documentation: PCI: endpoint: Clarify pci_epc_set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aXHo2YDMkMnFb2LI@ryzen>
Date: Thu, 22 Jan 2026 10:07:37 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Koichiro Den <den@...inux.co.jp>
Cc: jingoohan1@...il.com, mani@...nel.org, lpieralisi@...nel.org,
	kwilczynski@...nel.org, robh@...nel.org, bhelgaas@...gle.com,
	vigneshr@...com, s-vadapalli@...com, hongxing.zhu@....com,
	l.stach@...gutronix.de, shawnguo@...nel.org, s.hauer@...gutronix.de,
	kernel@...gutronix.de, festevam@...il.com, minghuan.Lian@....com,
	mingkai.hu@....com, roy.zang@....com, jesper.nilsson@...s.com,
	heiko@...ech.de, srikanth.thokala@...el.com,
	marek.vasut+renesas@...il.com, yoshihiro.shimoda.uh@...esas.com,
	geert+renesas@...der.be, magnus.damm@...il.com,
	christian.bruel@...s.st.com, mcoquelin.stm32@...il.com,
	alexandre.torgue@...s.st.com, thierry.reding@...il.com,
	jonathanh@...dia.com, hayashi.kunihiko@...ionext.com,
	mhiramat@...nel.org, kishon@...nel.org, jirislaby@...nel.org,
	rongqianfeng@...o.com, 18255117159@....com,
	shawn.lin@...k-chips.com, nicolas.frattaroli@...labora.com,
	linux.amoon@...il.com, vidyas@...dia.com, Frank.Li@....com,
	linux-omap@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev, linuxppc-dev@...ts.ozlabs.org,
	linux-arm-kernel@...s.com, linux-rockchip@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-tegra@...r.kernel.org
Subject: Re: [PATCH v9 5/5] Documentation: PCI: endpoint: Clarify
 pci_epc_set_bar() usage

On Thu, Jan 22, 2026 at 05:49:09PM +0900, Koichiro Den wrote:
> The current documentation implies that pci_epc_set_bar() is only used
> before the host enumerates the endpoint.
> 
> In practice, some Endpoint Controllers support calling pci_epc_set_bar()
> multiple times for the same BAR (without clearing it) in order to update
> inbound address translations after the host has programmed the BAR base
> address, which some Endpoint Functions such as vNTB already rely on.
> Add document text for that.
> 
> Also document the expected call flow for BAR subrange mapping
> (pci_epf_bar.num_submap / pci_epf_bar.submap), which may require a
> second pci_epc_set_bar() call after the host has programmed the BAR base
> address.
> 
> Reviewed-by: Frank Li <Frank.Li@....com>
> Signed-off-by: Koichiro Den <den@...inux.co.jp>
> ---

Reviewed-by: Niklas Cassel <cassel@...nel.org>