[Xen-devel] [PATCH v2] tools/misc/xenpm: fix getting info when some CPUs are offline

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

Use physinfo.max_cpu_id instead of physinfo.nr_cpus to get max CPU id.
This fixes for example 'xenpm get-cpufreq-para' with smt=off, which
otherwise would miss half of the cores.

Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
---
Reported by @tfm1:
https://github.com/QubesOS/qubes-issues/issues/4456

Changes in v2:
 - fix off by one error
---
 tools/misc/xenpm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c
index 86c12ea5fb..65aa4c9d42 100644
--- a/tools/misc/xenpm.c
+++ b/tools/misc/xenpm.c
@@ -1231,7 +1231,7 @@ int main(int argc, char *argv[])
         xc_interface_close(xc_handle);
         return ret;
     }
-    max_cpu_nr = physinfo.nr_cpus;
+    max_cpu_nr = physinfo.max_cpu_id + 1;
 
     /* calculate how many options match with user's input */
     for ( i = 0; i < ARRAY_SIZE(main_options); i++ )
-- 
2.17.2


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