From: Guenter Roeck <linux@roeck-us.net>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Joerg Roedel <joro@8bytes.org>,
"open list:INTEL IOMMU (VT-d)" <iommu@lists.linux-foundation.org>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: WARNING: at drivers/iommu/dmar.c:484 warn_invalid_dmar with Intel Motherboard
Date: Tue, 9 Jul 2013 15:31:06 -0700 [thread overview]
Message-ID: <20130709223106.GA16429@roeck-us.net> (raw)
In-Reply-To: <CAErSpo6Ma1TnBP-UGGhWFN1rj48y+yTS=VmVw_s30_FWgjfdpg@mail.gmail.com>
On Tue, Jul 09, 2013 at 03:05:39PM -0600, Bjorn Helgaas wrote:
> [+cc Joerg, David, iommu list]
>
> On Tue, Jul 9, 2013 at 2:24 PM, Guenter Roeck <linux@roeck-us.net> wrote:
> > I started seeing this problem after updating the BIOS trying fix another issue,
> > though I may have missed it earlier.
> >
> > I understand this is a BIOS bug. Would be great if someone can pass this on
> > to Intel BIOS engineers.
>
> Maybe. It'd be nice if Linux handled it better, though.
>
If anyone has an idea how to do that, I'll be happy to write a patch.
Guenter
> > CPU is i7-4770K.
> >
> > Guenter
> >
> > ---
> >
> > [ 0.000000] WARNING: at drivers/iommu/dmar.c:484 warn_invalid_dmar+0x86/0xa0()
> > [ 0.000000] Your BIOS is broken; DMAR reported at address 0!
> > [ 0.000000] BIOS vendor: Intel Corp.; Ver: RLH8710H.86A.0320.2013.0606.1802; Product Version:
> > [ 0.000000] Modules linked in:
> > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.10.0+ #1
> > [ 0.000000] Hardware name: /DH87RL, BIOS RLH8710H.86A.0320.2013.0606.1802 06/06/2013
> > [ 0.000000] 000000000000000b ffffffff81c01e20 ffffffff81671cfc ffffffff81c01e68
> > [ 0.000000] ffffffff81c01e58 ffffffff81043370 ffffffff81f6800c ffffffff81cbb520
> > [ 0.000000] 0000000000000000 ffff88061fdaad40 00000000c73cc018 ffffffff81c01eb8
> > [ 0.000000] Call Trace:
> > [ 0.000000] [<ffffffff81671cfc>] dump_stack+0x45/0x56
> > [ 0.000000] [<ffffffff81043370>] warn_slowpath_common+0x70/0xa0
> > [ 0.000000] [<ffffffff81043404>] warn_slowpath_fmt_taint+0x44/0x50
> > [ 0.000000] [<ffffffff81d162eb>] ? early_ioremap+0x13/0x15
> > [ 0.000000] [<ffffffff81d0d6a6>] ? __acpi_map_table+0x13/0x1a
> > [ 0.000000] [<ffffffff81548bf6>] warn_invalid_dmar+0x86/0xa0
> > [ 0.000000] [<ffffffff81d4b994>] check_zero_address+0x57/0xf7
> > [ 0.000000] [<ffffffff81d4ba49>] detect_intel_iommu+0x15/0xb6
> > [ 0.000000] [<ffffffff81d07d28>] pci_iommu_alloc+0x49/0x70
> > [ 0.000000] [<ffffffff81d15de4>] mem_init+0x17/0x9c
> > [ 0.000000] [<ffffffff81d01c54>] start_kernel+0x1c5/0x3e2
> > [ 0.000000] [<ffffffff81d01898>] ? repair_env_string+0x5e/0x5e
> > [ 0.000000] [<ffffffff81d015a3>] x86_64_start_reservations+0x2a/0x2c
> > [ 0.000000] [<ffffffff81d0169b>] x86_64_start_kernel+0xf6/0xf9
> > [ 0.000000] ---[ end trace a7e3512e2fa85eaf ]---
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
>
next prev parent reply other threads:[~2013-07-09 22:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-09 20:24 Guenter Roeck
2013-07-09 21:05 ` Bjorn Helgaas
2013-07-09 22:31 ` Guenter Roeck [this message]
2013-07-09 23:22 ` Chris Wright
2013-07-09 23:43 ` Guenter Roeck
2013-07-10 0:05 ` Chris Wright
2013-07-10 0:18 ` Guenter Roeck
2013-07-10 0:53 ` David Woodhouse
2013-07-10 3:55 ` Guenter Roeck
2013-07-11 19:00 ` Chris Wright
2013-07-11 20:59 ` Guenter Roeck
2013-07-11 22:31 ` Chris Wright
2013-08-14 9:36 ` Joerg Roedel
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