From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v3 20/23] arm64: perf: Count EL2 events if the kernel is running in HYP Date: Wed, 3 Feb 2016 18:00:13 +0000 Message-ID: <1454522416-6874-21-git-send-email-marc.zyngier@arm.com> References: <1454522416-6874-1-git-send-email-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org To: Catalin Marinas , Will Deacon , Christoffer Dall Return-path: In-Reply-To: <1454522416-6874-1-git-send-email-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org When the kernel is running in HYP (with VHE), it is necessary to include EL2 events if the user requests counting kernel or hypervisor events. Signed-off-by: Marc Zyngier --- arch/arm64/kernel/perf_event.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index f7ab14c..6013a38 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -20,6 +20,7 @@ */ #include +#include #include #include @@ -693,10 +694,15 @@ static int armv8pmu_set_event_filter(struct hw_perf_event *event, return -EPERM; if (attr->exclude_user) config_base |= ARMV8_EXCLUDE_EL0; - if (attr->exclude_kernel) - config_base |= ARMV8_EXCLUDE_EL1; - if (!attr->exclude_hv) - config_base |= ARMV8_INCLUDE_EL2; + if (is_kernel_in_hyp_mode()) { + if (!attr->exclude_kernel || !attr->exclude_hv) + config_base |= ARMV8_INCLUDE_EL2; + } else { + if (attr->exclude_kernel) + config_base |= ARMV8_EXCLUDE_EL1; + if (!attr->exclude_hv) + config_base |= ARMV8_INCLUDE_EL2; + } /* * Install the filter into config_base as this is used to -- 2.1.4