[PATCH 5/5] perf/core: Allow kernel address filter when not filtering the kernel

From: Adrian Hunter <adrian.hunter@intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Jiri Olsa <jolsa@redhat.com>,
	linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org, kvm@vger.kernel.org,
	H Peter Anvin <hpa@zytor.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Leo Yan <leo.yan@linaro.org>
Subject: [PATCH 5/5] perf/core: Allow kernel address filter when not filtering the kernel
Date: Mon, 31 Jan 2022 09:24:53 +0200	[thread overview]
Message-ID: <20220131072453.2839535-6-adrian.hunter@intel.com> (raw)
In-Reply-To: <20220131072453.2839535-1-adrian.hunter@intel.com>

The so-called 'kernel' address filter can also be useful for filtering
fixed addresses in user space.  Allow that.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 kernel/events/core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index af043a1a06ca..7670b0918e46 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10454,8 +10454,6 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
 		 */
 		if (state == IF_STATE_END) {
 			ret = -EINVAL;
-			if (kernel && event->attr.exclude_kernel)
-				goto fail;
 
 			/*
 			 * ACTION "filter" must have a non-zero length region
-- 
2.25.1

