[Xen-devel] [Patch v2] xen/cpuidle: Change logging for unknown apic_ids

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Dom0 uses this hypercall to pass ACPI information to Xen.  It is not very
uncommon for more cpus to be listed in the ACPI tables than are present on the
system, particularly on systems with a common BIOS for a 2 and 4 socket server
varients.

As Dom0 does not control the number of entries in the ACPI tables, and is
required to pass everything it finds to Xen, change the logging.

There is now an single unconditional warning for the first unknown ID, and
further warnings if "cpuinfo" is requested by the user on the command line.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CC: Keir Fraser <keir@xxxxxxx>
CC: Jan Beulich <JBeulich@xxxxxxxx>
---
 xen/arch/x86/acpi/cpu_idle.c |    5 ++++-
 xen/arch/x86/cpu/common.c    |    2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/acpi/cpu_idle.c b/xen/arch/x86/acpi/cpu_idle.c
index 8cb1514..dfc38f3 100644
--- a/xen/arch/x86/acpi/cpu_idle.c
+++ b/xen/arch/x86/acpi/cpu_idle.c
@@ -1031,7 +1031,10 @@ long set_cx_pminfo(uint32_t cpu, struct 
xen_processor_power *power)
     cpu_id = get_cpu_id(cpu);
     if ( cpu_id == -1 )
     {
-        printk(XENLOG_ERR "no cpu_id for acpi_id %d\n", cpu);
+        static bool_t warn_once = 1;
+        if ( warn_once || opt_cpu_info )
+            printk(XENLOG_WARNING "No CPU ID for APIC ID %#x\n", cpu);
+        warn_once = 0;
         return -EINVAL;
     }
 
diff --git a/xen/arch/x86/cpu/common.c b/xen/arch/x86/cpu/common.c
index 5e8a758..24c3dd8 100644
--- a/xen/arch/x86/cpu/common.c
+++ b/xen/arch/x86/cpu/common.c
@@ -63,7 +63,7 @@ static struct cpu_dev default_cpu = {
 };
 static struct cpu_dev * this_cpu = &default_cpu;
 
-bool_t __cpuinitdata opt_cpu_info;
+bool_t opt_cpu_info;
 boolean_param("cpuinfo", opt_cpu_info);
 
 int __cpuinit get_model_name(struct cpuinfo_x86 *c)
-- 
1.7.10.4


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