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From: Edgar Hucek <hostmaster@ed-soft.at>
To: Linus Torvalds <torvalds@osdl.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	LKML <linux-kernel@vger.kernel.org>,
	akpm@osdl.org
Subject: [PATCH 1/1] Add force of use MMCONFIG [try #1]
Date: Sun, 16 Jul 2006 11:00:21 +0200
Message-ID: <44BA0025.6020105@ed-soft.at> (raw)
In-Reply-To: <Pine.LNX.4.64.0607140901200.5623@g5.osdl.org>

This Patch add force for mmconfig.
On Intel Macs the efi firmaware gives
a different memory map then ACPI_MCFG
provides. This makes the chack wether
to use mmconfig or not fail.

Signed-off-by: Edgar Hucek <hostmaster@ed-soft.at>

diff -uNr linux-2.6.18-rc2/arch/i386/Kconfig linux-2.6.18-rc2.mactel/arch/i386/Kconfig
--- linux-2.6.18-rc2/arch/i386/Kconfig	2006-07-16 10:38:09.000000000 +0200
+++ linux-2.6.18-rc2.mactel/arch/i386/Kconfig	2006-07-16 10:16:12.000000000 +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-rc2/arch/i386/pci/mmconfig.c linux-2.6.18-rc2.mactel/arch/i386/pci/mmconfig.c
--- linux-2.6.18-rc2/arch/i386/pci/mmconfig.c	2006-07-16 10:38:10.000000000 +0200
+++ linux-2.6.18-rc2.mactel/arch/i386/pci/mmconfig.c	2006-07-16 10:18:04.000000000 +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 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");




  parent reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-06-26 21:19 [PATCH 1/1] Fix boot on efi 32 bit Machines [try #4] Edgar Hucek
2006-06-26 21:33 ` Linus Torvalds
2006-06-27  6:15   ` Edgar Hucek
2006-06-27  6:20     ` Linus Torvalds
2006-06-28 22:37       ` H. Peter Anvin
2006-07-02 17:39         ` Eric W. Biederman
2006-07-02 17:42           ` H. Peter Anvin
2006-07-02 18:26             ` Eric W. Biederman
2006-07-02 18:46               ` Arjan van de Ven
2006-07-05  9:38               ` Edgar Hucek
2006-07-05 15:52                 ` Eric W. Biederman
2006-07-13 21:46                   ` Edgar Hucek
2006-07-13 22:15                     ` Linus Torvalds
2006-07-14  4:23                       ` Eric W. Biederman
2006-07-14  6:22                         ` H. Peter Anvin
2006-07-14  6:20                       ` Edgar Hucek
2006-07-14 16:09                         ` Linus Torvalds
2006-07-16  8:55                           ` [PATCH 1/1] Add efi e820 memory mapping on x86 [try #1] Edgar Hucek
2006-07-25  4:29                             ` Andrew Morton
2006-07-25  5:17                               ` Eric W. Biederman
2006-07-25  5:32                               ` Linus Torvalds
2006-07-25  5:34                                 ` H. Peter Anvin
2006-07-25  5:44                                   ` Linus Torvalds
2006-07-25  6:26                                     ` H. Peter Anvin
2006-07-25  6:00                                 ` Linus Torvalds
2006-07-16  9:00                           ` Edgar Hucek [this message]
2006-07-25  4:33                             ` [PATCH 1/1] Add force of use MMCONFIG " Andrew Morton
2006-07-25  5:27                               ` Linus Torvalds
2006-07-26 15:05                                 ` Andi Kleen

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