* 2.6.17-rc6 does not boot on HP dc7600u - MCFG area is not E820-reserved
@ 2006-06-15 12:20 Barry Scott
2006-06-15 14:35 ` Barry Scott
0 siblings, 1 reply; 3+ messages in thread
From: Barry Scott @ 2006-06-15 12:20 UTC (permalink / raw)
To: linux-kernel
I'm trying to boot 2.6.17-rc6 with Mismatched section patches applied.
On my HP dc7600U the last messages printed are:
PCI: BUIS Bug: MCFG area is not E820-reserved
PCI: Not using MMCONFIG
Googling I found a message about a IBM laptop reporting this message
but that it did go on to boot. THere was a suggestion that the test
should be
removed. I commented out the code and I can boot further.
Here is the code I patched.
--- arch/i386/pci/mmconfig.c~ 2006-06-15 13:04:58.000000000 +0100
+++ arch/i386/pci/mmconfig.c 2006-06-15 13:04:58.000000000 +0100
@@ -194,17 +194,19 @@
if ((pci_mmcfg_config_num == 0) ||
(pci_mmcfg_config == NULL) ||
(pci_mmcfg_config[0].base_address == 0))
return;
+/* qqq
if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
pci_mmcfg_config[0].base_address +
MMCONFIG_APER_SIZE,
E820_RESERVED)) {
printk(KERN_ERR "PCI: BIOS Bug: MCFG area is not
E820-reserved\n");
printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
return;
}
+qqq */
printk(KERN_INFO "PCI: Using MMCONFIG\n");
raw_pci_ops = &pci_mmcfg;
pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
Barry
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 2.6.17-rc6 does not boot on HP dc7600u - MCFG area is not E820-reserved
2006-06-15 12:20 2.6.17-rc6 does not boot on HP dc7600u - MCFG area is not E820-reserved Barry Scott
@ 2006-06-15 14:35 ` Barry Scott
0 siblings, 0 replies; 3+ messages in thread
From: Barry Scott @ 2006-06-15 14:35 UTC (permalink / raw)
Cc: linux-kernel
Barry Scott wrote:
> I'm trying to boot 2.6.17-rc6 with Mismatched section patches applied.
>
> On my HP dc7600U the last messages printed are:
>
> PCI: BUIS Bug: MCFG area is not E820-reserved
> PCI: Not using MMCONFIG
>
> Googling I found a message about a IBM laptop reporting this message
> but that it did go on to boot. THere was a suggestion that the test
> should be
> removed. I commented out the code and I can boot further.
>
> Here is the code I patched.
>
> --- arch/i386/pci/mmconfig.c~ 2006-06-15 13:04:58.000000000 +0100
> +++ arch/i386/pci/mmconfig.c 2006-06-15 13:04:58.000000000 +0100
> @@ -194,17 +194,19 @@
> if ((pci_mmcfg_config_num == 0) ||
> (pci_mmcfg_config == NULL) ||
> (pci_mmcfg_config[0].base_address == 0))
> return;
>
> +/* qqq
> if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
> pci_mmcfg_config[0].base_address +
> MMCONFIG_APER_SIZE,
> E820_RESERVED)) {
> printk(KERN_ERR "PCI: BIOS Bug: MCFG area is not
> E820-reserved\n");
> printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
> return;
> }
> +qqq */
>
> printk(KERN_INFO "PCI: Using MMCONFIG\n");
> raw_pci_ops = &pci_mmcfg;
> pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
>
> Barry
>
> -
> 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/
Chuck Ebbert's MMCONFIG patch fixes this problem for me.
Barry
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 2.6.17-rc6 does not boot on HP dc7600u - MCFG area is not E820-reserved
@ 2006-06-16 3:00 Chuck Ebbert
0 siblings, 0 replies; 3+ messages in thread
From: Chuck Ebbert @ 2006-06-16 3:00 UTC (permalink / raw)
To: Barry Scott; +Cc: linux-kernel
In-Reply-To: <44915098.3070404@onelan.co.uk>
On Thu, 15 Jun 2006 13:20:40, Barry Scott wrote:
> I'm trying to boot 2.6.17-rc6 with Mismatched section patches applied.
>
> On my HP dc7600U the last messages printed are:
>
> PCI: BUIS Bug: MCFG area is not E820-reserved
> PCI: Not using MMCONFIG
I posted this today. Please test. It is less picky and will print
the address of the MMCONFIG area if it fails.
--- 2.6.17-rc6-64.orig/arch/i386/pci/mmconfig.c
+++ 2.6.17-rc6-64/arch/i386/pci/mmconfig.c
@@ -15,7 +15,9 @@
#include <asm/e820.h>
#include "pci.h"
-#define MMCONFIG_APER_SIZE (256*1024*1024)
+/* aperture is up to 256MB but BIOS may reserve less */
+#define MMCONFIG_APER_MIN (2 * 1024*1024)
+#define MMCONFIG_APER_MAX (256 * 1024*1024)
/* Assume systems with more busses have correct MCFG */
#define MAX_CHECK_BUS 16
@@ -197,9 +199,10 @@ void __init pci_mmcfg_init(void)
return;
if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
- pci_mmcfg_config[0].base_address + MMCONFIG_APER_SIZE,
+ pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
E820_RESERVED)) {
- printk(KERN_ERR "PCI: BIOS Bug: MCFG area is not E820-reserved\n");
+ printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",
+ pci_mmcfg_config[0].base_address);
printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
return;
}
--- 2.6.17-rc6-64.orig/arch/x86_64/pci/mmconfig.c
+++ 2.6.17-rc6-64/arch/x86_64/pci/mmconfig.c
@@ -13,7 +13,10 @@
#include "pci.h"
-#define MMCONFIG_APER_SIZE (256*1024*1024)
+/* aperture is up to 256MB but BIOS may reserve less */
+#define MMCONFIG_APER_MIN (2 * 1024*1024)
+#define MMCONFIG_APER_MAX (256 * 1024*1024)
+
/* Verify the first 16 busses. We assume that systems with more busses
get MCFG right. */
#define MAX_CHECK_BUS 16
@@ -175,9 +178,10 @@ void __init pci_mmcfg_init(void)
return;
if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
- pci_mmcfg_config[0].base_address + MMCONFIG_APER_SIZE,
+ pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
E820_RESERVED)) {
- printk(KERN_ERR "PCI: BIOS Bug: MCFG area is not E820-reserved\n");
+ printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",
+ pci_mmcfg_config[0].base_address);
printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
return;
}
@@ -190,7 +194,8 @@ void __init pci_mmcfg_init(void)
}
for (i = 0; i < pci_mmcfg_config_num; ++i) {
pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i];
- pci_mmcfg_virt[i].virt = ioremap_nocache(pci_mmcfg_config[i].base_address, MMCONFIG_APER_SIZE);
+ pci_mmcfg_virt[i].virt = ioremap_nocache(pci_mmcfg_config[i].base_address,
+ MMCONFIG_APER_MAX);
if (!pci_mmcfg_virt[i].virt) {
printk("PCI: Cannot map mmconfig aperture for segment %d\n",
pci_mmcfg_config[i].pci_segment_group_number);
--
Chuck
^ permalink raw reply [flat|nested] 3+ messages in thread
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