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Date: Sat, 2 Apr 2016 02:19:50 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: Borislav Petkov <bp@...e.de>
Cc: Stephane Eranian <eranian@...gle.com>,
Peter Zijlstra <peterz@...radead.org>,
Andi Kleen <ak@...ux.intel.com>,
LKML <linux-kernel@...r.kernel.org>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
"mingo@...e.hu" <mingo@...e.hu>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Zhang Rui <rui.zhang@...el.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: [bug] mapping multiple BARs
ping
On Thu, Mar 24, 2016 at 02:36:56PM +0100, Jiri Olsa wrote:
> On Thu, Mar 24, 2016 at 11:15:06AM +0100, Borislav Petkov wrote:
> > On Thu, Mar 24, 2016 at 10:44:41AM +0100, Jiri Olsa wrote:
> > > hi,
> > > I'm hitting following lines in dmesg:
> > > resource sanity check: requesting [mem 0xfed10000-0xfed15fff], which spans more than reserved [mem 0xfed10000-0xfed13fff]
> > > caller snb_uncore_imc_init_box+0x7c/0xa0 mapping multiple BARs
> > >
> > > I'm on IvyBridge model 58
> > > vendor_id : GenuineIntel
> > > cpu family : 6
> > > model : 58
> > > model name : Intel(R) Core(TM) i7-3720QM CPU @ 2.60GHz
> > > stepping : 9
> > > microcode : 0x1c
> > >
> > > I've read following threads:
> > > http://marc.info/?w=2&r=1&s=mapping+multiple+BARs&q=t
> > >
> > > and it seems this is supposed to be already fixed by:
> > > cb171f7abb9a PNP: Work around BIOS defects in Intel MCH area reporting
> >
> > And as we talked on IRC, it looked like the quirk gets applied on my
> > machine and not on yours. I.e., I see:
> >
> > [ 0.669351] pnp 00:01: [Firmware Bug]: PNP resource [mem 0xfed10000-0xfed13fff] covers only part of 0000:00:00.0 Intel MCH; extending to [mem 0xfed10000-0xfed17fff]
> >
> > and you don't.
> >
> > Can you add some debug printks to quirk_intel_mch() to find out why?
>
> seems like this function did not find any quirk
> (patch for the output attached)
>
> [root@...el-chiefriver-04 ~]# dmesg | grep quirk_intel_mch
> quirk_intel_mch dev WDT0
> quirk_intel_mch region start ffff880244617778, end fed10000
> quirk_intel_mch mch start fed10000, end fed17fff
> quirk_intel_mch res start 6a4, end 6a4
> quirk_intel_mch res start 6a0, end 6a0
> quirk_intel_mch dev LDRC
> quirk_intel_mch region start ffff880244617378, end fed10000
> quirk_intel_mch mch start fed10000, end fed17fff
> quirk_intel_mch res start 2e, end 2f
> quirk_intel_mch res start 4e, end 4f
> quirk_intel_mch res start 61, end 61
> quirk_intel_mch res start 63, end 63
> quirk_intel_mch res start 65, end 65
> quirk_intel_mch res start 67, end 67
> quirk_intel_mch res start 70, end 70
> quirk_intel_mch res start 80, end 80
> quirk_intel_mch res start 92, end 92
> quirk_intel_mch res start b2, end b3
> quirk_intel_mch res start 680, end 69f
> quirk_intel_mch res start 1004, end 1013
> quirk_intel_mch res start ffff, end ffff
> quirk_intel_mch res start ffff, end ffff
> quirk_intel_mch res start 400, end 453
> quirk_intel_mch res start 458, end 47f
> quirk_intel_mch res start 500, end 57f
> quirk_intel_mch res start 164e, end 164f
> quirk_intel_mch dev CWDT
> quirk_intel_mch region start ffff8802446b8b78, end fed10000
> quirk_intel_mch mch start fed10000, end fed17fff
> quirk_intel_mch res start 454, end 457
> quirk_intel_mch dev PDRC
> quirk_intel_mch region start ffff8802446bcb78, end fed10000
> quirk_intel_mch mch start fed10000, end fed17fff
> quirk_intel_mch res start fed1c000, end fed1ffff
> quirk_intel_mch res start fed10000, end fed17fff
> quirk_intel_mch res start fed18000, end fed18fff
> quirk_intel_mch res start fed19000, end fed19fff
> quirk_intel_mch res start f8000000, end fbffffff
> quirk_intel_mch res start fed20000, end fed3ffff
> quirk_intel_mch res start fed90000, end fed93fff
> quirk_intel_mch res start fed45000, end fed8ffff
> quirk_intel_mch res start ff000000, end ffffffff
> quirk_intel_mch res start fee00000, end feefffff
> quirk_intel_mch res start b15b0000, end b15b0fff
>
>
> but AFAICS the following dmesg output:
>
> resource sanity check: requesting [mem 0xfed10000-0xfed15fff], which spans more than reserved [mem 0xfed10000-0xfed13fff]
> caller snb_uncore_imc_init_box+0x7c/0xa0 mapping multiple BARs
>
> is related to checking of iomem_resource, which I haven't
> found connected to the pnp_dev resources from the quirk code
>
>
> thanks,
> jirka
>
>
> ---
> diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
> index d28e3ab..964ba12 100644
> --- a/drivers/pnp/quirks.c
> +++ b/drivers/pnp/quirks.c
> @@ -397,13 +397,22 @@ static void quirk_intel_mch(struct pnp_dev *dev)
> mch.flags = IORESOURCE_MEM;
> pcibios_bus_to_resource(host->bus, &mch, ®ion);
>
> +printk("quirk_intel_mch dev %s\n", dev->name);
> +printk("quirk_intel_mch region start %llx, end %llx\n", dev->name, region.start, region.end);
> +printk("quirk_intel_mch mch start %llx, end %llx\n", mch.start, mch.end);
> +
> list_for_each_entry(pnp_res, &dev->resources, list) {
> res = &pnp_res->res;
> +
> +printk("quirk_intel_mch res start %llx, end %llx\n", res->start, res->end);
> +
> if (res->end < mch.start || res->start > mch.end)
> continue; /* no overlap */
> if (res->start == mch.start && res->end == mch.end)
> continue; /* exact match */
>
> +printk("quirk_intel_mch GOT IT\n");
> +
> dev_info(&dev->dev, FW_BUG "PNP resource %pR covers only part of %s Intel MCH; extending to %pR\n",
> res, pci_name(host), &mch);
> res->start = mch.start;
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