linux-kernel - [PATCH 4/4] MMCONFIG: Fix x86_64 ioremap base

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 10 Jan 2007 04:01:13 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Andi Kleen <ak@...e.de>
Subject: [PATCH 4/4] MMCONFIG: Fix x86_64 ioremap base_address

Current mmconfig has some problems of remapped range.  The base
address always corresponds to bus number 0, but currently we are
assuming it corresponds to start bus number.

This patch fixes the above problems.

Signed-off-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
---

 arch/x86_64/pci/mmconfig.c |   21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff -puN arch/x86_64/pci/mmconfig.c~pci-mmconfig-ioremap-range-fix-mm arch/x86_64/pci/mmconfig.c
--- linux-2.6/arch/x86_64/pci/mmconfig.c~pci-mmconfig-ioremap-range-fix-mm	2007-01-06 01:04:47.000000000 +0900
+++ linux-2.6-hirofumi/arch/x86_64/pci/mmconfig.c	2007-01-06 01:05:35.000000000 +0900
@@ -118,6 +118,20 @@ int __init pci_mmcfg_arch_reachable(unsi
 	return pci_dev_base(seg, bus, devfn) != NULL;
 }
 
+static void __iomem * __init mcfg_ioremap(struct acpi_table_mcfg_config *cfg)
+{
+	void __iomem *addr;
+	u32 size;
+
+	size = (cfg->end_bus_number + 1) << 20;
+	addr = ioremap_nocache(cfg->base_address, size);
+	if (addr) {
+		printk(KERN_INFO "PCI: Using MMCONFIG at %x - %x\n",
+		       cfg->base_address, cfg->base_address + size - 1);
+	}
+	return addr;
+}
+
 int __init pci_mmcfg_arch_init(void)
 {
 	int i;
@@ -128,19 +142,14 @@ int __init pci_mmcfg_arch_init(void)
 	}
 
 	for (i = 0; i < pci_mmcfg_config_num; ++i) {
-		u32 size = (pci_mmcfg_config[0].end_bus_number - pci_mmcfg_config[0].start_bus_number + 1) << 20;
 		pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i];
-		pci_mmcfg_virt[i].virt = ioremap_nocache(pci_mmcfg_config[i].base_address,
-							 size);
+		pci_mmcfg_virt[i].virt = mcfg_ioremap(&pci_mmcfg_config[i]);
 		if (!pci_mmcfg_virt[i].virt) {
 			printk(KERN_ERR "PCI: Cannot map mmconfig aperture for "
 					"segment %d\n",
 			       pci_mmcfg_config[i].pci_segment_group_number);
 			return 0;
 		}
-		printk(KERN_INFO "PCI: Using MMCONFIG at %x-%x\n",
-		       pci_mmcfg_config[i].base_address,
-		       pci_mmcfg_config[i].base_address + size - 1);
 	}
 
 	raw_pci_ops = &pci_mmcfg;
_
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/