LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Yinghai Lu <Yinghai.Lu@Sun.COM>
To: Ingo Molnar <mingo@elte.hu>, Greg KH <greg@kroah.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Jeff Garzik <jeff@garzik.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [PATCH] x86: skip it if Fam 10h only handle bus 0
Date: Wed, 20 Feb 2008 17:36:19 -0800	[thread overview]
Message-ID: <200802201736.19685.yinghai.lu@sun.com> (raw)
In-Reply-To: <200802190313.02551.yinghai.lu@sun.com>


need to apply after
	x86_64: check MSR to get MMCONFIG for AMD Family 10h Opteron v3

some BIOS only let AMD fam 10h handle bus0, and nvidia mcp55/ck804
to handle other buses. at that case MCFG will cover all over them.

this patch will skip it so to use MCFG later.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>

Index: linux-2.6/arch/x86/pci/mmconfig-shared.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/mmconfig-shared.c
+++ linux-2.6/arch/x86/pci/mmconfig-shared.c
@@ -123,6 +123,14 @@ static const char __init *pci_mmcfg_amd_
 
 	busnbits = (msr >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) &
 			 FAM10H_MMIO_CONF_BUSRANGE_MASK;
+
+	/*
+	 * only handle bus 0 ?
+	 * need to skip it
+	 */
+	if (!busnbits)
+		return NULL;
+
 	if (busnbits > 8) {
 		segnbits = busnbits - 8;
 		busnbits = 8;

  reply	other threads:[~2008-02-21  1:28 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <200802190311.44404.yinghai.lu@sun.com>
2008-02-19 11:13 ` [PATCH 1/8] x86_64: check MSR to get MMCONFIG for AMD Family 10h Opteron v3 Yinghai Lu
2008-02-21  1:36   ` Yinghai Lu [this message]
2008-02-19 11:13 ` [PATCH 2/8] x86_64: check and enable " Yinghai Lu
2008-02-19 11:15 ` [PATCH 4/8] x86_64: use bus conf in NB conf fun1 to get bus range on node Yinghai Lu
2008-02-19 11:20 ` [PATCH 3/8] x86_64: get mp_bus_to_node as early v4 Yinghai Lu
2008-02-19 11:20 ` [PATCH 5/8] try parent numa_node at first before using default v2 Yinghai Lu
2008-02-19 17:54   ` Greg KH
2008-02-19 19:51     ` Yinghai Lu
2008-02-19 11:20 ` [PATCH 6/8] net: use numa_node in net_devcice->dev instead of parent Yinghai Lu
2008-02-19 11:21   ` Ingo Molnar
2008-02-19 11:41     ` David Miller
2008-02-19 19:42       ` Yinghai Lu
2008-02-19 19:47         ` Yinghai Lu
2008-02-19 22:55         ` David Miller
2008-02-19 23:10           ` Yinghai Lu
2008-02-20  6:27             ` Ingo Molnar
2008-02-20  8:33               ` Yinghai Lu
2008-02-19 11:21 ` [PATCH 7/8] x86_64: get boot_cpu_id as early for k8_scan_nodes Yinghai Lu
2008-02-19 11:21 ` [PATCH 8/8] x86_64: multi pci root bus with different io resource range Yinghai Lu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200802201736.19685.yinghai.lu@sun.com \
    --to=yinghai.lu@sun.com \
    --cc=akpm@linux-foundation.org \
    --cc=greg@kroah.com \
    --cc=jeff@garzik.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --subject='Re: [PATCH] x86: skip it if Fam 10h only handle bus 0' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).