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Date: Tue, 17 May 2016 07:34:05 -0400 From: Prarit Bhargava <prarit@...hat.com> To: linux-kernel@...r.kernel.org Cc: Prarit Bhargava <prarit@...hat.com>, Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Jacob Jun Pan <jacob.jun.pan@...el.com>, "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org Subject: [PATCH] powercap/rapl: Do not load in virtualized environments intel_rapl is currently not supported in virtualized environments. When booting the warning message intel_rapl: no valid rapl domains found in package 0 is output for every virtual core. This patch stops the driver from being loaded in virtual boots. Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com> Cc: Jacob Jun Pan <jacob.jun.pan@...el.com> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net> Cc: linux-pm@...r.kernel.org Signed-off-by: Prarit Bhargava <prarit@...hat.com> --- drivers/powercap/intel_rapl.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c index f2201d42a9cd..bebfbe8acccd 100644 --- a/drivers/powercap/intel_rapl.c +++ b/drivers/powercap/intel_rapl.c @@ -29,6 +29,7 @@ #include <linux/sysfs.h> #include <linux/cpu.h> #include <linux/powercap.h> +#include <asm/hypervisor.h> #include <asm/iosf_mbi.h> #include <asm/processor.h> @@ -1600,6 +1601,10 @@ static int __init rapl_init(void) return -ENODEV; } + /* Intel RAPL is not supported on virtualized environments */ + if (x86_hyper) + return -ENODEV; + rapl_defaults = (struct rapl_defaults *)id->driver_data; cpu_notifier_register_begin(); -- 1.7.9.3
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