3.0 patches

diff --git a/queue-3.0/series b/queue-3.0/series
index 98e3de6523a5bd8bbb0f05d1a14702ddedc86b16..155f50f9134fd8bf9a76939b3933a24b59c0ce67 100644 (file)
--- a/queue-3.0/series
+++ b/queue-3.0/series
@@ -68,3 +68,4 @@ mmc-core-use-non-reentrant-workqueue-for-clock-gating.patch
 mmc-sdhci-s3c-fix-mmc-card-i-o-problem.patch
 xen-use-maximum-reservation-to-limit-amount-of-usable-ram.patch
 xen-x86_32-do-not-enable-iterrupts-when-returning-from.patch
+xen-smp-warn-user-why-they-keel-over-nosmp-or-noapic-and-what-to-use-instead.patch

diff --git a/queue-3.0/xen-smp-warn-user-why-they-keel-over-nosmp-or-noapic-and-what-to-use-instead.patch b/queue-3.0/xen-smp-warn-user-why-they-keel-over-nosmp-or-noapic-and-what-to-use-instead.patch
new file mode 100644 (file)
index 0000000..cb08918
--- /dev/null
+++ b/queue-3.0/xen-smp-warn-user-why-they-keel-over-nosmp-or-noapic-and-what-to-use-instead.patch
@@ -0,0 +1,52 @@
+From ed467e69f16e6b480e2face7bc5963834d025f91 Mon Sep 17 00:00:00 2001
+From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Date: Thu, 1 Sep 2011 09:48:27 -0400
+Subject: xen/smp: Warn user why they keel over - nosmp or noapic and what to use instead.
+
+From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+
+commit ed467e69f16e6b480e2face7bc5963834d025f91 upstream.
+
+We have hit a couple of customer bugs where they would like to
+use those parameters to run an UP kernel - but both of those
+options turn of important sources of interrupt information so
+we end up not being able to boot. The correct way is to
+pass in 'dom0_max_vcpus=1' on the Xen hypervisor line and
+the kernel will patch itself to be a UP kernel.
+
+Fixes bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637308
+
+Acked-by: Ian Campbell <Ian.Campbell@eu.citrix.com>
+Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+---
+ arch/x86/xen/smp.c |   10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+--- a/arch/x86/xen/smp.c
++++ b/arch/x86/xen/smp.c
+@@ -32,6 +32,7 @@
+ #include <xen/page.h>
+ #include <xen/events.h>
+ 
++#include <xen/hvc-console.h>
+ #include "xen-ops.h"
+ #include "mmu.h"
+ 
+@@ -207,6 +208,15 @@ static void __init xen_smp_prepare_cpus(
+       unsigned cpu;
+       unsigned int i;
+ 
++      if (skip_ioapic_setup) {
++              char *m = (max_cpus == 0) ?
++                      "The nosmp parameter is incompatible with Xen; " \
++                      "use Xen dom0_max_vcpus=1 parameter" :
++                      "The noapic parameter is incompatible with Xen";
++
++              xen_raw_printk(m);
++              panic(m);
++      }
+       xen_init_lock_cpu(0);
+ 
+       smp_store_cpu_info(0);