linux-kernel - Re: [Xen-devel] HPET enabled in BIOS, not presented as available_clocksource -- config, kernel code, &/or BIOS?

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: <dcd8d407-4597-b754-2efa-a81fcd9e8a83@gmail.com>
Date:   Sat, 13 May 2017 13:05:22 -0700
From:   PGNet Dev <pgnet.dev@...il.com>
To:     Andrew Cooper <andrew.cooper3@...rix.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Clemens Ladisch <clemens@...isch.de>,
        xen-devel@...ts.xenproject.org
Subject: Re: [Xen-devel] HPET enabled in BIOS, not presented as
 available_clocksource -- config, kernel code, &/or BIOS?

On 5/13/17 12:59 PM, Andrew Cooper wrote:
> Ok.  Lack of a clocksource is to be expected.
> 
> The reason why the HPETs are unavailable is that dom0 is not a position
> to program them; dom0 doesn't know what Xen has set up in the IDT.
> 
> Use `xl dmesg` to get to the hypervisor dmesg log.  You should see
> mention of the HPET in there if Xen has found it.

back to the error at hand ...

  xl dmesg | grep -i hpet
   [    1.365876] hpet_acpi_add: no address or irqs in _CRS
   [    1.365876] hpet_acpi_add: no address or irqs in _CRS

again, only present when booting with Xen.

same kernel, no Xen, no such error.