Commit 216c3087 authored Apr 16, 2019 by Madhavan Srinivasan Committed by Michael Ellerman May 03, 2019

powerpc/perf: Add privileged access check for thread_imc



Add code to restrict user access to thread_imc pmu since
some event report privilege level information.

Fixes: f74c89bd ("powerpc/perf: Add thread IMC PMU support")
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent dd50cf7c

arch/powerpc/perf/imc-pmu.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -864,6 +864,9 @@ static int thread_imc_event_init(struct perf_event *event)
		if (event->attr.type != event->pmu->type)
		return -ENOENT;

		if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

		/* Sampling not supported */
		if (event->hw.sample_period)
		return -EINVAL;