From mboxrd@z Thu Jan 1 00:00:00 1970 From: plagnioj@jcrosoft.com (Jean-Christophe PLAGNIOL-VILLARD) Date: Thu, 18 Apr 2013 12:01:32 +0200 Subject: [RFC] arm64: Early printk support for virtio-mmio console devices. In-Reply-To: References: <1366264344-28025-1-git-send-email-pranavkumar@linaro.org> <87wqs02uws.fsf@rustcorp.com.au> Message-ID: <20130418100132.GE4998@game.jcrosoft.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 13:02 Thu 18 Apr , Pranavkumar Sawargaonkar wrote: > On 18 April 2013 12:21, Rusty Russell wrote: > > > > PranavkumarSawargaonkar writes: > > > From: Pranavkumar Sawargaonkar > > > > > > This patch implements early printk support for virtio-mmio console devices without using any hypercalls. > > > > This makes some sense, though not sure that early console *read* makes > > much sense. I can see the PCI version of this being useful as well. > > Read can be useful for "mach-virt" which will have only virtio console > as a console device. Then if someone wants to have UEFI or any other > boot-loader emulation, which expects user to input few things, in that > case read might become handy. yes I'm adding barebox on arm64 and will need it for virt target Best Regards, J. > > > > > > The spec definition for this will be interesting, because it can be used > > before the device is initialized (something which is generally > > verboten). > > > > Cheers, > > Rusty. > > Thanks, > Pranav > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel