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Date: Mon, 31 Jul 2006 10:28:14 +0200
From: Edgar Hucek <hostmaster@...soft.at>
To: LKML <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...l.org>,
Andrew Morton <akpm@...l.org>
Subject: [PATCH 2/3] add-force-of-use-mmconfig.patch
This Patch add force for mmconfig. On Intel Macs the efi firmaware gives
a different memory map then ACPI_MCFG provides. This makes the check wether
to use mmconfig or not fail.
Signed-off-by: Edgar Hucek <hostmaster@...soft.at>
diff -uNr linux-2.6.18-rc3/arch/i386/Kconfig linux-2.6.18-rc3.mactel/arch/i386/Kconfig
--- linux-2.6.18-rc3/arch/i386/Kconfig 2006-07-31 09:24:20.000000000 +0200
+++ linux-2.6.18-rc3.mactel/arch/i386/Kconfig 2006-07-31 09:27:55.000000000 +0200
@@ -1027,6 +1027,7 @@
default y
config PCI_MMCONFIG
+ depends on DMI
bool
depends on PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
default y
diff -uNr linux-2.6.18-rc3/arch/i386/pci/mmconfig.c linux-2.6.18-rc3.mactel/arch/i386/pci/mmconfig.c
--- linux-2.6.18-rc3/arch/i386/pci/mmconfig.c 2006-07-31 09:24:20.000000000 +0200
+++ linux-2.6.18-rc3.mactel/arch/i386/pci/mmconfig.c 2006-07-31 09:27:57.000000000 +0200
@@ -12,6 +12,8 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/efi.h>
#include <asm/e820.h>
#include "pci.h"
@@ -187,6 +189,54 @@
}
}
+/*
+ * Print system on which MMCONFIG is forced.
+ */
+
+static int __init pci_mmcfg_force_system(struct dmi_system_id *id)
+{
+ printk(KERN_INFO "PCI: System %s detected. Force MMCONFIG\n",
+ id->ident);
+
+ return 0;
+}
+
+/*
+ * DMI table of forced MMCONFIG systems.
+ */
+
+static struct dmi_system_id __initdata pci_mmcfg_dmi_system_apple[] = {
+ { pci_mmcfg_force_system, "iMac4,1", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
+ DMI_MATCH(DMI_BIOS_VERSION,"iMac4,1") }},
+ { pci_mmcfg_force_system, "MacBookPro1,1", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
+ DMI_MATCH(DMI_BIOS_VERSION,"MacBookPro1,1") }},
+ { pci_mmcfg_force_system, "MacBook1,1", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME,"MacBook1,1")}},
+ { pci_mmcfg_force_system, "Macmini1,1", {
+ DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME,"Macmini1,1")}},
+ {},
+};
+
+/*
+ * Check force MMCONFIG.
+ */
+
+int __init pci_mmcfg_force(void)
+{
+ if (efi_enabled) {
+ if (dmi_check_system(pci_mmcfg_dmi_system_apple)) {
+ add_memory_region(pci_mmcfg_config[0].base_address,
+ pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN, E820_RESERVED);
+ return 1;
+ }
+ }
+ return 0;
+}
+
void __init pci_mmcfg_init(void)
{
if ((pci_probe & PCI_PROBE_MMCONF) == 0)
@@ -198,13 +248,15 @@
(pci_mmcfg_config[0].base_address == 0))
return;
- if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
- pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
- E820_RESERVED)) {
- 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;
+ if (!pci_mmcfg_force()) {
+ if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
+ pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
+ E820_RESERVED)) {
+ 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;
+ }
}
printk(KERN_INFO "PCI: Using MMCONFIG\n");
-
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