netdev - Re: [Xen-devel] printk from softirq on xen: hard lockup

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]

Date:	Thu, 6 Aug 2015 17:58:29 +0200
From:	"Jason A. Donenfeld" <Jason@...c4.com>
To:	David Vrabel <david.vrabel@...rix.com>,
	Ian Campbell <ian.campbell@...rix.com>
Cc:	netdev@...r.kernel.org, Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, xen-devel@...ts.xen.org
Subject: Re: [Xen-devel] printk from softirq on xen: hard lockup

On Thu, Aug 6, 2015 at 12:02 PM, David Vrabel <david.vrabel@...rix.com> wrote:
> Linux PV guests must use the "Xen PV" APIC driver.  You need to
> investigate why your PV guest is not using this (although I'm surprised
> it works at all with the wrong one).

Actually it appears this PV Guest is using the "flat" APIC driver
instead of the Xen APIC driver.

But upon further investigation into why:

arch/x86/xen/Makefile:
    obj-$(CONFIG_XEN_DOM0)          += apic.o vga.o

It would appear that only dom0 gets to use the Xen APIC driver.

What gives?

Jason
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html