xen/pci: don't use PCI BIOS service for configuration space accesses

[pandora-kernel.git] / arch / x86 / xen / smp.c

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index e79dbb9..9a23fff 100644 (file)
--- 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"
 
@@ -171,6 +172,7 @@ static void __init xen_fill_possible_map(void)
 static void __init xen_filter_cpu_maps(void)
 {
        int i, rc;
+       unsigned int subtract = 0;
 
        if (!xen_initial_domain())
                return;
@@ -185,8 +187,22 @@ static void __init xen_filter_cpu_maps(void)
                } else {
                        set_cpu_possible(i, false);
                        set_cpu_present(i, false);
+                       subtract++;
                }
        }
+#ifdef CONFIG_HOTPLUG_CPU
+       /* This is akin to using 'nr_cpus' on the Linux command line.
+        * Which is OK as when we use 'dom0_max_vcpus=X' we can only
+        * have up to X, while nr_cpu_ids is greater than X. This
+        * normally is not a problem, except when CPU hotplugging
+        * is involved and then there might be more than X CPUs
+        * in the guest - which will not work as there is no
+        * hypercall to expand the max number of VCPUs an already
+        * running guest has. So cap it up to X. */
+       if (subtract)
+               nr_cpu_ids = nr_cpu_ids - subtract;
+#endif
+
 }
 
 static void __init xen_smp_prepare_boot_cpu(void)
@@ -207,6 +223,15 @@ static void __init xen_smp_prepare_cpus(unsigned int max_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);
@@ -522,7 +547,6 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
        WARN_ON(xen_smp_intr_init(0));
 
        xen_init_lock_cpu(0);
-       xen_init_spinlocks();
 }
 
 static int __cpuinit xen_hvm_cpu_up(unsigned int cpu)