linux-kernel - [PATCH] supporting MMCONFIG over 4GB on x86

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>] [day] [month] [year] [list]

Message-ID: <43c301fe0703020307g37f7df7dxd8f94adaac3acaf3@mail.gmail.com>
Date:	Fri, 2 Mar 2007 20:07:58 +0900
From:	"Takayoshi Kochi" <takayoshi.kochi@...il.com>
To:	linux-acpi@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] supporting MMCONFIG over 4GB on x86_64

Hi,

Currently MMCONFIG is ignored if it is located over 4G, but I see no reason
to reject it on x86_64 platform.

This patch is against 2.6.21-rc2 and was tested on
such a machine (MMCONFIG is located at 0xfe10000000)
without any problem.

Any comments?

-- 
Takayoshi Kochi

Signed-off-by: Takayoshi Kochi <takayoshi.kochi@...il.com>
---
 boot.c |    2 ++
 1 files changed, 2 insertions(+)

--- linux-2.6.20/arch/i386/kernel/acpi/boot.c.orig	2007-03-02
14:34:02.000000000 +0900
+++ linux-2.6.20/arch/i386/kernel/acpi/boot.c	2007-03-02
19:38:10.000000000 +0900
@@ -198,6 +198,7 @@ int __init acpi_parse_mcfg(struct acpi_t

 	memcpy(pci_mmcfg_config, &mcfg[1], config_size);
 	for (i = 0; i < pci_mmcfg_config_num; ++i) {
+#ifndef CONFIG_X86_64
 		if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
 			printk(KERN_ERR PREFIX
 			       "MMCONFIG not in low 4GB of memory\n");
@@ -205,6 +206,7 @@ int __init acpi_parse_mcfg(struct acpi_t
 			pci_mmcfg_config_num = 0;
 			return -ENODEV;
 		}
+#endif
 	}

 	return 0;
-
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/