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Date: Tue, 6 Oct 2015 14:17:03 -0400 From: "Gabriel L. Somlo" <somlo@....edu> To: Andy Lutomirski <luto@...capital.net> Cc: Greg KH <gregkh@...uxfoundation.org>, paul@...an.com, galak@...eaurora.org, Will Deacon <will.deacon@....com>, agross@...eaurora.org, Mark Rutland <mark.rutland@....com>, zajec5@...il.com, hanjun.guo@...aro.org, Catalin Marinas <catalin.marinas@....com>, Linux API <linux-api@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, kernelnewbies@...nelnewbies.org, Matt Fleming <matt.fleming@...el.com>, Laszlo Ersek <lersek@...hat.com>, "Jordan Justen (Intel address)" <jordan.l.justen@...el.com>, "Michael S. Tsirkin" <mst@...hat.com>, peter.maydell@...aro.org, Leif Lindholm <leif.lindholm@...aro.org>, Ard Biesheuvel <ard.biesheuvel@...aro.org>, Paolo Bonzini <pbonzini@...hat.com>, kraxel@...hat.com, "qemu-devel@...gnu.org Developers" <qemu-devel@...gnu.org> Subject: Re: [PATCH v3 1/4] firmware: introduce sysfs driver for QEMU's fw_cfg device On Tue, Oct 06, 2015 at 10:54:42AM -0700, Andy Lutomirski wrote: > On Sat, Oct 3, 2015 at 4:28 PM, Gabriel L. Somlo <somlo@....edu> wrote: > > From: Gabriel Somlo <somlo@....edu> > > > > Make fw_cfg entries of type "file" available via sysfs. Entries > > are listed under /sys/firmware/qemu_fw_cfg/by_key, in folders > > named after each entry's selector key. Filename, selector value, > > and size read-only attributes are included for each entry. Also, > > a "raw" attribute allows retrieval of the full binary content of > > each entry. > > > > This patch also provides a documentation file outlining the > > guest-side "hardware" interface exposed by the QEMU fw_cfg device. > > > > What's the status of "by_name"? There's a single (presumably > incorrect) mention of it in a comment in this patch. > > I would prefer if the kernel populated by_name itself rather than > deferring that to udev, since I'd like to use this facility in virtme, > and I'd like to use fw_cfg very early on boot before I even start > udev. "by_name" is added with patch 4/4 of the series, which I kept separate due to the "To udev or not to udev" conversation from earlier. So far I haven't yet figured out just HOW I'd set it up in udev, but it works already if done in the kernel :) Thanks, --Gabriel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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