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| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-01-25 17:31:13 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 18:34:18 +0000 |
| commit | d98ecdaca296815b3c4d11032b3699af6b49b70b (patch) | |
| tree | 55421a6070487ad0f694fb28da3441c471bb2d39 /arch/arm64/kernel/perf_event.c | |
| parent | 5f05a72aed023e5824eebb2542b5397cb89188f4 (diff) | |
| download | lwn-d98ecdaca296815b3c4d11032b3699af6b49b70b.tar.gz lwn-d98ecdaca296815b3c4d11032b3699af6b49b70b.zip | |
arm64: perf: Count EL2 events if the kernel is running in HYP
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.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kernel/perf_event.c')
| -rw-r--r-- | arch/arm64/kernel/perf_event.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index f7ab14c4d5df..1b52269ffa87 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -20,6 +20,7 @@ */ #include <asm/irq_regs.h> +#include <asm/virt.h> #include <linux/of.h> #include <linux/perf/arm_pmu.h> @@ -691,9 +692,12 @@ static int armv8pmu_set_event_filter(struct hw_perf_event *event, if (attr->exclude_idle) return -EPERM; + if (is_kernel_in_hyp_mode() && + attr->exclude_kernel != attr->exclude_hv) + return -EINVAL; if (attr->exclude_user) config_base |= ARMV8_EXCLUDE_EL0; - if (attr->exclude_kernel) + if (!is_kernel_in_hyp_mode() && attr->exclude_kernel) config_base |= ARMV8_EXCLUDE_EL1; if (!attr->exclude_hv) config_base |= ARMV8_INCLUDE_EL2; |